| This document details the changes between this version, bash-4.3-release, and |
| the previous version, bash-4.3-rc2. |
| |
| 1. Changes to Bash |
| |
| a. Only Posix-mode shells should exit on an assignment failure in the |
| temporary environment preceding a special builtin. This is how it's been |
| documented. |
| |
| b. Fixed a bug that caused a failed special builtin to not exit a posix-mode |
| shell if the failing builtin was on the LHS of a && or ||. |
| |
| c. Changed the handling of unquoted backslashes in regular expressions to be |
| closer to bash-4.2. |
| |
| d. globstar (**) no longer traverses symbolic links that resolve to |
| directories. This eliminates some duplicate entries. |
| |
| e. Fixed a bug that caused a SIGCHLD trap handler to not be able to change the |
| SIGCHLD disposition. |
| |
| f. Fixed a bug that caused a crash when -x was enabled and a command |
| contained a printable multibyte (wide) character. |
| |
| g. Fixed a bug that caused an interactive shell without line editing enabled |
| to read invalid data after receiving a SIGINT. |
| |
| h. Fixed a bug that caused command word completion to fail if the directory in |
| $PATH where the completion would be found contained single or double quotes. |
| |
| i. Fixed a bug that caused a shell with -v enabled to print commands in $() |
| multiple times. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that caused `undo' to reference freed memory or null pointers. |
| |
| 3. New Features in Bash |
| |
| a. The [[ -v ]] option now understands array references (foo[1]) and returns |
| success if the referenced element has a value. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.3-rc2, and the |
| previous version, bash-4.3-rc1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that left variables set by printf -v marked as invisible. |
| |
| b. Fixed an off-by-one error in a job control warning message. |
| |
| c. Fixed a bug that caused the shell to crash after declaring a nameref variable |
| without a value. |
| |
| d. Fixed a bug that caused asynchronous commands to not set $? correctly. |
| |
| e. Fixed a bug that caused out-of-order execution when executing aliases with |
| embedded newlines containing `.' commands. |
| |
| f. Fixed a bug that caused error messages generated by expansion errors in |
| `for' commands to have the wrong line number. |
| |
| g. Fixed a bug that caused the `wait' builtin to not be interruptible in an |
| interactive shell with job control enabled. |
| |
| h. Fixed a bug that caused SIGINT and SIGQUIT to not be trappable in |
| asynchronous subshell commands. |
| |
| i. Bash now requires that the value assigned to a nameref variable be a valid |
| shell identifier (variable name or array reference). |
| |
| j. Converting an existing variable to a nameref variable now turns off the |
| -i/-l/-u/-c attributes. |
| |
| k. Displaying a nameref variable with `declare -p' now displays the nameref |
| variable and its value rather than following the nameref chain. |
| |
| l. Fixed a problem with interrupt handling that caused a second and subsequent |
| SIGINT to be ignored by interactive shells. |
| |
| m. Fixed a bug that caused certain positional parameter and array expansions |
| to mishandle (discard) null positional parameters and array elements. |
| |
| n. The shell no longer blocks receipt of signals while running trap handlers |
| for those signals, and allows most trap handlers to be run recursively |
| (running trap handlers while a trap handler is executing). |
| |
| o. The shell now handles backslashes in regular expression arguments to the |
| [[ command's =~ operator slightly differently, resulting in more |
| consistent behavior. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that could cause readline to crash and seg fault attempting to |
| expand an empty history entry. |
| |
| b. Fixed a bug that caused a bad entry in the $LS_COLORS variable to abort all |
| color processing but leave color enabled. |
| |
| c. Fixed a bug that caused display problems with multi-line prompts containing |
| invisible characters on multiple lines. |
| |
| d. Fixed a bug that caused effects made by undoing changes to a history line to |
| be discarded. |
| |
| 3. New Features in Bash |
| |
| 4. New Features in Readline |
| |
| a. When creating shared libraries on Mac OS X, the pathname written into the |
| library (install_name) no longer includes the minor version number. |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.3-rc1, and the |
| previous version, bash-4.3-beta2. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug in bash completion that caused a tilde to be expanded even if |
| the `direxpand' option was not enabled. |
| |
| b. Fixed a potential bug that could cause corrupted input in interactive shells |
| running without line editing and with `ignoreeof' enabled. |
| |
| c. Fixed a bug that could cause failures when opening pipes back to shells |
| created to run process substitutions. |
| |
| d. Fixed a bug that caused an assignment to TEXTDOMAIN to require TEXTDOMAINDIR |
| to be set in order to actually change the current text domain. |
| |
| e. Changed the way redirections are printed to avoid confusion when the target |
| of an output redirection is a process substitution beginning with `>'. |
| |
| 2. Changes to Readline |
| |
| a. Shared library building is now supported on Mac OS X 10.9 (Darwin 13). |
| |
| 3. New Features in Bash |
| |
| a. `cd' has a new `-@' option to browse a file's extended attributes on |
| systems that support O_XATTR. |
| |
| 4. New Features in Readline |
| |
| a. There are additional default key bindings for MinGW32 |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.3-beta2, and the |
| previous version, bash-4.3-beta. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused assignment to an unset variable using a negative |
| subscript to result in a segmentation fault. |
| |
| b. Fixed a bug that caused assignment to a string variable using a negative |
| subscript to use the incorrect index. |
| |
| c. Fixed a bug that caused some strings to be interpreted as invalid |
| extended globbing expressions when used with the help builtin. |
| |
| d. Fixed a bug that caused an attempt to trap a signal whose disposition |
| cannot be changed to reference uninitialized memory. |
| |
| e. Command completion now skips assignment statements preceding a command |
| name and completes the command. |
| |
| f. Fixed a bug that caused `compgen -f' in a non-interactive shell to dump |
| core under certain circumstances. |
| |
| g. Fixed a bug that caused the `read -N' to misbehave when the input stream |
| contains 0xff. |
| |
| 2. Changes to Readline |
| |
| a. Changed message when an incremental search fails to include "failed" in |
| the prompt and display the entire search string instead of just the last |
| matching portion. |
| |
| b. Fixed a bug that caused an arrow key typed to an incremental search prompt |
| to process the key sequence incorrectly. |
| |
| c. Additional key bindings for arrow keys on MinGW. |
| |
| 3. New Features in Bash |
| |
| a. The help builtin now attempts substring matching (as it did through |
| bash-4.2) if exact string matching fails. |
| |
| b. The fc builtin now interprets -0 as the current command line. |
| |
| c. Completing directory names containing shell variables now adds a trailing |
| slash if the expanded result is a directory. |
| |
| 4. New Features in Readline |
| |
| a. rl_change_environment: new application-settable variable that controls |
| whether or not Readline modifies the environment (currently readline |
| modifies only LINES and COLUMNS). |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.3-beta, and the |
| previous version, bash-4.3-alpha. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug in the prompt directory name "trimming" code that caused |
| memory corruption and garbled the results. |
| |
| b. Fixed a bug that caused single quotes that resulted from $'...' quoting |
| in the replacement portion of a double-quoted ${word/pat/rep} expansion |
| to be treated as quote characters. |
| |
| c. Fixed a bug that caused assignment statements preceding a command word to |
| result in assignment statements following a declaration command to not be |
| expanded like assignment statements. |
| |
| d. Fixed a bug with variable search order in the presence of local variables |
| with the same name as variables in the temporary environment supplied to |
| a shell function. |
| |
| e. Fixed a bug that caused constructs like 1<(2) to be interpreted as process |
| substitutions even in an arithmetic context. |
| |
| f. Fixed several cases where `invisible' variables (variables with attributes |
| but no values, which are technically unset) were treated incorrectly. |
| |
| g. Fixed a bug that caused group commands in pipelines that were not the |
| last element to not run the EXIT trap. |
| |
| h. Fixed a bug that caused `unset -n' to not unset a nameref variable in |
| certain cases. |
| |
| i. Fixed the nameref circular reference checking to be less strict and only |
| disallow a nameref variable with the same value as its name at the global |
| scope. |
| |
| j. Fixed a bug that caused trap handlers to be executed recursively, |
| corrupting internal data structures. |
| |
| k. Fixed a bug that could result in bash not compiling if certain options were |
| not enabled. |
| |
| l. Fixed a bug that caused the arithmetic expansion code to attempt variable |
| assignments when operator precedence prohibited them. |
| |
| m. Word expansions like ${foo##bar} now understand indirect variable references. |
| |
| n. Fixed a bug that caused `declare -fp name' to not display a function |
| definition. |
| |
| o. Fixed a bug that caused asynchronous child processes to modify the stdin |
| file pointer when bash was using it to read a script, which modified the |
| parent's value as well. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug in vi mode that caused the arrow keys to set the saved last |
| vi-mode command to the wrong value. |
| |
| b. Fixed a bug that caused double-quoted strings to be scanned incorrectly |
| when being used as the value of a readline variable assignment. |
| |
| c. Fixed a bug with vi mode that prevented `.' from repeating a command |
| entered on a previous line (command). |
| |
| d. Fixed a bug that could cause completion to core dump if it was interrupted |
| by a signal. |
| |
| e. Readline now sends the meta-key enable string to the terminal if the |
| terminal has been successfully initialized. |
| |
| f. Readline now calls the signal hook after resizing the terminal when it |
| receives a SIGWINCH. |
| |
| g. Fixed a bug that could cause the history list code to perform an out-of- |
| bounds array reference if the history list is empty. |
| |
| 3. New Features in Bash |
| |
| a. Shells started to run process substitutions now run any trap set on EXIT. |
| |
| b. There is now a configure-time option to enable the globasciiranges option |
| by default. |
| |
| c. The read builtin now checks its first variable argument for validity before |
| trying to read any input. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.3-alpha, |
| and the previous version, bash-4.2-release. |
| |
| 1. Changes to Bash |
| |
| a. Fixed several bugs concerning incomplete bracket expressions in filename |
| generation (globbing) patterns. |
| |
| b. Fixed a bug with single quotes and WORD in ${param op WORD} when running |
| in Posix mode. |
| |
| c. Fixed a bug that caused the pattern removal and pattern substitution word |
| expansions and case statement word expansion to not match the empty string. |
| |
| d. Fixed a bug that caused the tzset() function to not work after changing |
| the TZ enviroment variable. |
| |
| e. Fixed a bug that caused the RHS of an assignment statement to undergo |
| word splitting when it contained an unquoted $@. |
| |
| f. Fixed bugs that caused the shell to not react to a SIGINT sent while |
| waiting for a child process to exit. |
| |
| g. Bash doesn't try to run things in a signal handler context when it gets a |
| signal (SIGINT/SIGHUP/etc) while reading input using readline but still |
| be responsive to terminating signals. |
| |
| h. Fixed a bug that caused bash to go into an infinite loop if a filename |
| to be matched contained an invalid multibyte character. |
| |
| i. Fixed a bug that caused PS4 to end up being truncated if it is longer |
| than 128 bytes. |
| |
| j. Fixed a bug that caused brace expansion to not skip over double-quoted |
| command substitution. |
| |
| k. System-specific updates for: DJGPP, HP/UX, Mac OS X |
| |
| l. Fixed a bug in displaying commands that caused redirections to be associated |
| with the wrong part of the command. |
| |
| m. Fixed the coproc cleanup to unset the appropriate shell variables when a |
| coproc terminates. |
| |
| n. Fixed a bug that caused `fc' to dump core due to incorrect calculation of |
| the last history entry. |
| |
| o. Added workarounds for FreeBSD's implementation of faccessat/eaccess and |
| `test -x'. |
| |
| p. Fixed a bug that caused the shell to not match patterns containing |
| control-A. |
| |
| q. Fixed a bug that could result in doubled error messages when the `printf' |
| builtin got a write error. |
| |
| r. Fixed a bug that caused the shell to not correctly expand words containing |
| multiple consecutive quoted empty strings (""""""aa). |
| |
| s. Fixed a bug that caused the shell to not correctly parse multi-line |
| process substitutions containing comments and quoted strings. |
| |
| t. Fixed a problem with the bash malloc's internal idea of the top of the |
| memory heap that resulted in incorrect decisions to try to reduce the |
| break and give memory back to the kernel. |
| |
| u. There are changes to the expansions peformed on compound array assignments, |
| in an effort to make foo=( [ind1]=bar [ind2]=baz ) identical to |
| foo[ind1]=bar foo[ind2]=baz. |
| |
| v. Bash now reports an error if `read -a name' is used when `name' is an |
| existing associative array. |
| |
| w. Fixed a bug that allowed an attempted assignment to a readonly variable |
| in an arithmetic expression to not return failure. |
| |
| x. Fixed several bugs that caused completion functions to be invoked even when |
| the cursor was before the first word in the command. |
| |
| y. Fixed a bug that caused parsing a command substitution to overwrite the |
| parsing state associated with the complete input line. |
| |
| z. Fixed several bugs with the built-in snprintf replacement and field widths |
| and floating point. |
| |
| aa. Fixed a bug that caused incorrect offset calculations and input buffer |
| corruption when reading files longer than 2^31 bytes. |
| |
| bb. Fixed several bugs where bash performed arithmetic evaluation in contexts |
| where evaluation is suppressed. |
| |
| cc. Fixed a bug that caused bash to close FIFOs used for process substitution |
| too early when a shell function was executing, but protect against using |
| all file descriptors when the shell functions are invoked inside loops. |
| |
| dd. Added checks for printable (and non-printable) multibyte characters for |
| use in error messages. |
| |
| ee. Fixed a bug that caused ^O (operate-and-get-next) to not work correctly |
| at the end of the history list. |
| |
| ff. Fixed a bug that caused command-oriented history to incorrectly combine |
| here documents into one line. |
| |
| gg. Fixed a bug that caused importing SHELLOPTS from the environment into a |
| Posix-mode shell to print an error message and refuse to parse it. |
| |
| hh. Fixed a bug that caused the shell to delete an extra history entry when |
| using `history -s'. |
| |
| ii. Fixed a bug that caused floating-point exceptions and overflow errors |
| for the / and % arithmetic operators when using INTMAX_MIN and -1. |
| |
| jj. Fixed a bug that caused parsing errors when reading an arithmetic for |
| loop inside a command substitution. |
| |
| kk. Fixed a bug that caused a readonly function to be unset when unset was |
| called without the -f or -v option. |
| |
| ll. Fixed several bugs in the code that quotes characters special to regular |
| expressions when used in a quoted string on the RHS of the =~ operator |
| to the [[ command. |
| |
| mm. Fixed a bug that caused redirections to fail because the file descriptor |
| limit was set to a value less than 10. |
| |
| nn. Fixed a bug that caused the `read' builtin to execute code in a signal |
| handler context if read timed out. |
| |
| oo. Fixed a bug that caused extended globbing patterns to not match files |
| beginning with `.' correctly when a `.' was explicitly supplied in the |
| pattern. |
| |
| pp. Fixed a bug that caused key sequences longer than two characters to not |
| work when used with `bind -x'. |
| |
| qq. Fixed a bug that resulted in redefined functions having the wrong source |
| file names in BASH_SOURCE. |
| |
| rr. Fixed a bug that caused the read builtin to assign null strings to variables |
| when using `read -N', which caused core dumps when referenced |
| |
| ss. Fixed a bug that caused `bash -m script' to not enable job control while |
| running the script. |
| |
| tt. Fixed a bug that caused `printf -v var' to dump core when used with the |
| %b format code. |
| |
| uu. Fixed a bug that caused the shell to exit with the wrong status if -e was |
| active and the shell exited on a substitution error. |
| |
| vv. Fixed a bug that caused the shell to seg fault if an array variable with |
| the same name as an existing associative array was implicitly created by |
| an assignment (declare a[n]=b). |
| |
| ww. Fixed a bug that caused a redirection to misbehave if the number specified |
| for a file descriptor overflows an intmax_t. |
| |
| xx. Fixed several bugs with the handling of valid and invalid unicode character |
| values when used with the \u and \U escape sequences to printf and $'...'. |
| |
| yy. Fixed a bug that caused tildes to not be escaped in expanded filenames, |
| making them subject to later expansion. |
| |
| zz. When using the pattern substitution word expansion, bash now runs the |
| replacement string through quote removal, since it allows quotes in that |
| string to act as escape characters. This is not backwards compatible, so |
| it can be disabled by setting the bash compatibility mode to 4.2. |
| |
| aaa. Fixed the rest of the cases where the shell runs non-allowed code in a |
| signal handler context. |
| |
| bbb. Fixed a bug that caused spurious DEL characters (\177) to appear in |
| double-quoted expansion where the RHS is evaluated to the empty string. |
| |
| ccc. Fixed a bug that caused the use of the shell's internal random number |
| generator for temporary file names to perturb the random number |
| sequence. |
| |
| ddd. Fixed several bugs that caused `declare -g' to not set the right global |
| variables or to misbehave when declaring global indexed arrays. |
| |
| eee. Fixed a logic bug that caused extended globbing in a multibyte locale to |
| cause failures when using the pattern substititution word expansions. |
| |
| fff. Fixed a bug that caused the `lastpipe' option to corrupt the file |
| descriptor used to read the script. |
| |
| ggg. Fixed a bug that causes the shell to delete DEL characters in the |
| expanded value of variables used in the same quoted string as variables |
| that expand to nothing. |
| |
| hhh. Fixed a bug that caused the shell to assign the wrong value from an |
| assignment like (( x=7 )) when `x' was an existing array variable. |
| |
| iii. Fixed a bug that caused the shell to misbehave when generating sequences |
| and the boundary values overflow an intmax_t. |
| |
| jjj. Fixed a bug caused expansion errors if an expansion of "$@" appeared |
| next to another expansion (e.g.. "${@}${x}"). |
| |
| kkk. Fixed a potential buffer overflow bug when performing /dev/fd expansion. |
| |
| lll. Fixed a bug that resulted in an extra semicolon being added to compound |
| assignments when they were added to the history list. |
| |
| mmm. Fixed a bug that caused mapfile to read one extra line from the input. |
| |
| nnn. Fixed a bug that caused the mail checking code to use uninitialized |
| values. |
| |
| ooo. Fixed a bug that prevented history timestamps from being saved if the |
| history comment character is unset. |
| |
| ppp. Fixed a bug that caused the case-modifying expansions to not work with |
| multibyte characters. |
| |
| qqq. Fixed a bug that caused the edit-and-execute bindable readline command |
| to see the wrong data if invoked in the middle of a multi-line quoted |
| string. |
| |
| rrr. Fixed a bug that resulted in the shell returning the wrong exit status |
| for a background command on systems that recycle PIDs very quickly. |
| |
| sss. Fixed a bug that caused asynchronous group commands to not run any EXIT |
| trap defined in the body of the command. |
| |
| ttt. Fixed a bug that caused `eval "... ; return"' to not clean up properly. |
| |
| uuu. Fixed a bug that caused the shell to dump core if `read' reads an escaped |
| IFS whitespace character. |
| |
| vvv. Fixed a bug that caused BASH_COMMAND to be set to an incorrect value when |
| executing a (...) subshell. |
| |
| www. Fixed a couple of pointer aliasing bugs with the token string in arithmetic |
| evaluation. |
| |
| xxx. Fixed a bug with parsing multi-line command substitutions when reading |
| the `do' keyword followed by whitespace. |
| |
| yyy. Fixed a bug that caused the shell to seg fault if the time given to the |
| printf %(...)T format overflowed the value accepted by localtime(3). |
| |
| zzz. Fixed a problem with displaying help topics in two columns when the |
| translated text contained multibyte characters. |
| |
| aaaa. Fixed a bug with the extended globbing pattern matcher where a `*' was |
| followed by a negated extended glob pattern. |
| |
| bbbb. Fixed a race condition with short-lived coproc creation and reaping that |
| caused the child process to be reaped before the various coproc shell |
| variables were initialized. |
| |
| cccc. Fixed a bug where turning off `errexit' in command substitution subshells |
| was not reflected in $SHELLOPTS. |
| |
| dddd. Partially fixed an inconsistency in how the shell treated shell |
| functions run from an EXIT trap. |
| |
| eeee. Fixed a bug in how the shell invalidated FIFOs used for process |
| substitution when executing a pipeline (once rather than in every child). |
| |
| ffff. Fixed a bug that occurred when expanding a special variable ($@, $*) |
| within double quotes and the expansion resulted in an empty string. |
| |
| gggg. Fixed bugs with executing a SIGCHLD trap handler to make sure that it's |
| executed once per exited child. |
| |
| hhhh. Fixed a bug that caused `declare' and `test' to find variables that |
| had been given attributes but not assigned values. Such variables are |
| not set. |
| |
| iiii. Fixed a bug that caused commands in process substitutions to not look in |
| the local temporary environment when performing word expansions. |
| |
| jjjj. Fixed several problems with globstar expansions (**/**) returning null |
| filenames and multiple instances of the same pathname. |
| |
| kkkk. Fixed an oversight that did not allow the exit status of `coproc' to |
| be inverted using `!'. |
| |
| llll. Fixed a bug that caused the -e option to be re-enabled using `set -e' |
| even when executing in a context where -e is ignored. |
| |
| mmmm. Fixed a (mostly theoretical) bug with input lines longer than SIZE_MAX. |
| |
| nnnn. Fixed a bug that could result in double evaluation of command |
| substitutions when they appear in failed redirections. |
| |
| oooo. Fixed a bug that could cause seg faults during `mapfile' callbacks if |
| the callback unsets the array variable mapfile is using. |
| |
| pppp. Fixed several problems with variable assignments using ${var:=value} |
| when the variable assignment is supposed to have side effects. |
| |
| qqqq. Fixed a bug that caused a failure of an assignment statement preceding a |
| builtin caused the next invocation of a special builtin to exit the shell. |
| |
| rrrr. Fixed several problems with IFS when it appears in the temporary environment |
| and is used in redirections. |
| |
| ssss. Fixed a problem that caused IFS changes using ${IFS:=value} to modify |
| how preceding expansions were split. |
| |
| tttt. Fixed a problem that caused subshells to not run an EXIT trap they set. |
| |
| uuuu. Fixed a problem that caused shells started in posix mode to attempt to |
| import shell functions with invalid names from the environment. We now |
| print a warning. |
| |
| vvvv. Worked around a kernel problem that caused SIGCHLD to interrupt open(2) |
| on a FIFO used for process substitution, even if the SIGCHLD handler was |
| installed with the SA_RESTART flag. |
| |
| wwww. Fixed a problem that resulted in inconsistent expansion of $* and ${a[*]}. |
| |
| xxxx. Fixed a problem that caused `read -t' to crash when interrupted by |
| SIGINT. |
| |
| yyyy. Fixed a problem that caused pattern removal to fail randomly because the |
| pattern matcher read beyond the end of a string. |
| |
| zzzz. Fixed a bug that caused core dumps when shell functions tried to create |
| local shadow copies of special variables like GROUPS. |
| |
| aaaaa. Fixed a bug that caused SIGTERM to be occasionally lost by children of |
| interactive shells when it arrived before the child process reset the |
| handler from SIG_DFL. |
| |
| bbbbb. Fixed a bug that caused redirections like <&n- to leave file descriptor |
| n closed if executed with a builtin command. |
| |
| ccccc. Fixed a bug that caused incorrect completion quoting when completing a |
| word containing a globbing character with `show-all-if-ambiguous' set. |
| |
| ddddd. Fixed a bug that caused printf's %q format specifier not to quote a |
| tilde even if it appeared in a location where it would be subject to |
| tilde expansion. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that did not allow the `dd', `cc', or `yy' vi editing mode |
| commands to work on the entire line. |
| |
| b. Fixed a bug that caused redisplay problems with prompts longer than 128 |
| characters and history searches. |
| |
| c. Fixed a bug that caused readline to try and run code to modify its idea |
| of the screen size in a signal handler context upon receiving a SIGWINCH. |
| |
| d. Fixed a bug that caused the `meta' key to be enabled beyond the duration |
| of an individual call top readline(). |
| |
| e. Added a workaround for a wcwidth bug in Mac OS X that caused readline's |
| redisplay to mishandle zero-width combining characters. |
| |
| f. Fixed a bug that caused readline to `forget' part of a key sequence when |
| a multiple-key sequence caused it to break out of an incremental search. |
| |
| g. Fixed bugs that caused readline to execute code in a signal handler |
| context if interrupted while reading from the file system during completion. |
| |
| h. Fixed a bug that caused readline to `forget' part of a key sequence when |
| reading an unbound multi-character key sequence. |
| |
| i. Fixed a bug that caused Readline's signal handlers to be installed beyond |
| the bounds of a single call to readline(). |
| |
| j. Fixed a bug that caused the `.' command to not redo the most recent `R' |
| command in vi mode. |
| |
| k. Fixed a bug that caused ignoring case in completion matches to result in |
| readline using the wrong match. |
| |
| l. Paren matching now works in vi insert mode. |
| |
| m. Fix menu-completion to make show-all-if-ambiguous and menu-complete-display-prefix |
| work together. |
| |
| n. Fixed a bug that didn't allow the `cc', `dd', or `yy' commands to be redone |
| in vi editing mode. |
| |
| o. Fixed a bug that caused the filename comparison code to not compare |
| multibyte characters correctly when using case-sensitive or case-mapping |
| comparisons. |
| |
| p. Fixed the input reading loop to call the input hook function only when there |
| is no terminal input available. |
| |
| q. Fixed a bug that caused binding a macro to a multi-character key sequence |
| where the sequence and macro value share a common prefix to not perform |
| the macro replacement. |
| |
| r. Fixed several redisplay errors with multibyte characters and prompts |
| containing invisible characters when using horizontal scrolling. |
| |
| s. Fixed a bug that caused redisplay errors when trying to overwrite |
| existing characters using multibyte characters. |
| |
| 3. New Features in Bash |
| |
| a. The `helptopic' completion action now maps to all the help topics, not just |
| the shell builtins. |
| |
| b. The `help' builtin no longer does prefix substring matching, so `help read' |
| does not match `readonly'. |
| |
| c. The shell can be compiled to not display a message about processes that |
| terminate due to SIGTERM. |
| |
| d. Non-interactive shells now react to the setting of checkwinsize and set |
| LINES and COLUMNS after a foreground job exits. |
| |
| e. There is a new shell option, `globasciiranges', which, when set to on, |
| forces globbing range comparisons to use character ordering as if they |
| were run in the C locale. |
| |
| f. There is a new shell option, `direxpand', which makes filename completion |
| expand variables in directory names in the way bash-4.1 did. |
| |
| g. In Posix mode, the `command' builtin does not change whether or not a |
| builtin it shadows is treated as an assignment builtin. |
| |
| h. The `return' and `exit' builtins accept negative exit status arguments. |
| |
| i. The word completion code checks whether or not a filename containing a |
| shell variable expands to a directory name and appends `/' to the word |
| as appropriate. The same code expands shell variables in command names |
| when performing command completion. |
| |
| j. In Posix mode, it is now an error to attempt to define a shell function |
| with the same name as a Posix special builtin. |
| |
| k. When compiled for strict Posix conformance, history expansion is disabled |
| by default. |
| |
| l. The history expansion character (!) does not cause history expansion when |
| followed by the closing quote in a double-quoted string. |
| |
| m. `complete' and its siblings compgen/compopt now takes a new `-o noquote' |
| option to inhibit quoting of the completions. |
| |
| n. Setting HISTSIZE to a value less than zero causes the history list to be |
| unlimited (setting it 0 zero disables the history list). |
| |
| o. Setting HISTFILESIZE to a value less than zero causes the history file size |
| to be unlimited (setting it to 0 causes the history file to be truncated |
| to zero size). |
| |
| p. The `read' builtin now skips NUL bytes in the input. |
| |
| q. There is a new `bind -X' option to print all key sequences bound to Unix |
| commands. |
| |
| r. When in Posix mode, `read' is interruptible by a trapped signal. After |
| running the trap handler, read returns 128+signal and throws away any |
| partially-read input. |
| |
| s. The command completion code skips whitespace and assignment statements |
| before looking for the command name word to be completed. |
| |
| t. The build process has a new mechanism for constructing separate help files |
| that better reflects the current set of compilation options. |
| |
| u. The -nt and -ot options to test now work with files with nanosecond |
| timestamp resolution. |
| |
| v. The shell saves the command history in any shell for which history is |
| enabled and HISTFILE is set, not just interactive shells. |
| |
| w. The shell has `nameref' variables and new -n(/+n) options to declare and |
| unset to use them, and a `test -R' option to test for them. |
| |
| x. The shell now allows assigning, referencing, and unsetting elements of |
| indexed arrays using negative subscripts (a[-1]=2, echo ${a[-1]}) which |
| count back from the last element of the array. |
| |
| y. The {x}<word redirection feature now allows words like {array[ind]} and |
| can use variables with special meanings to the shell (e.g., BASH_XTRACEFD). |
| |
| z. There is a new CHILD_MAX special shell variable; its value controls the |
| number of exited child statues the shell remembers. |
| |
| aa. There is a new configuration option (--enable-direxpand-default) that |
| causes the `direxpand' shell option to be enabled by default. |
| |
| bb. Bash does not do anything special to ensure that the file descriptor |
| assigned to X in {x}<foo remains open after the block containing it |
| completes. |
| |
| cc. The `wait' builtin has a new `-n' option to wait for the next child to |
| change status. |
| |
| dd. The `printf' %(...)T format specifier now uses the current time if no |
| argument is supplied. |
| |
| ee. There is a new variable, BASH_COMPAT, that controls the current shell |
| compatibility level. |
| |
| ff. The `popd' builtin now treats additional arguments as errors. |
| |
| gg. The brace expansion code now treats a failed sequence expansion as a |
| simple string and will continue to expand brace terms in the remainder |
| of the word. |
| |
| 4. New Features in Readline |
| |
| a. Readline is now more responsive to SIGHUP and other fatal signals when |
| reading input from the terminal or performing word completion but no |
| longer attempts to run any not-allowable functions from a signal handler |
| context. |
| |
| b. There are new bindable commands to search the history for the string of |
| characters between the beginning of the line and the point |
| (history-substring-search-forward, history-substring-search-backward) |
| |
| c. Readline allows quoted strings as the values of variables when setting |
| them with `set'. As a side effect, trailing spaces and tabs are ignored |
| when setting a string variable's value. |
| |
| d. The history library creates a backup of the history file when writing it |
| and restores the backup on a write error. |
| |
| e. New application-settable variable: rl_filename_stat_hook: a function called |
| with a filename before using it in a call to stat(2). Bash uses it to |
| expand shell variables so things like $HOME/Downloads have a slash |
| appended. |
| |
| f. New bindable function `print-last-kbd-macro', prints the most-recently- |
| defined keyboard macro in a reusable format. |
| |
| g. New user-settable variable `colored-stats', enables use of colored text |
| to denote file types when displaying possible completions (colored analog |
| of visible-stats). |
| |
| h. New user-settable variable `keyseq-timout', acts as an inter-character |
| timeout when reading input or incremental search strings. |
| |
| i. New application-callable function: rl_clear_history. Clears the history list |
| and frees all readline-associated private data. |
| |
| j. New user-settable variable, show-mode-in-prompt, adds a characters to the |
| beginning of the prompt indicating the current editing mode. |
| |
| k. New application-settable variable: rl_input_available_hook; function to be |
| called when readline needs to check whether there is data available on its |
| input source. The default hook checks rl_instream. |
| |
| l. Readline calls an application-set event hook (rl_signal_event_hook) after |
| it gets a signal while reading input (read returns -1/EINTR but readline |
| does not handle the signal immediately) to allow the application to handle |
| or otherwise note it. Not currently called for SIGHUP or SIGTERM. |
| |
| m. If the user-settable variable `history-size' is set to a value less than |
| 0, the history list size is unlimited. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.2-release, |
| and the previous version, bash-4.2-rc2. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused some variables to be clobbered by a longjmp, |
| resulting in stack corruption. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.2-rc2, |
| and the previous version, bash-4.2-rc1. |
| |
| 1. Changes to Bash |
| |
| a. Changes to bash_directory_completion_hook so that it's assigned to the |
| readline rl_directory_rewrite_hook variable, which modifies the directory |
| name passed to opendir without modifying the directory name the user |
| typed. |
| |
| b. Fixed bug in select builtin that caused it to not terminate correctly if |
| the read timed out due to $TMOUT. |
| |
| c. Fixed a problem that resulted in non-repeatable sequences of random |
| numbers when RANDOM=0. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.2-rc1, |
| and the previous version, bash-4.2-beta. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused some redirection errors to leak file descriptors. |
| |
| b. Fixed a bug that caused unary `+' and `-' arithmetic operators to have a |
| higher precedence than unary `!' and `~'. |
| |
| c. Fixed a bug that caused simple commands in a pipeline to affect the exit |
| status ($?) seen by subsequent pipeline commands. |
| |
| d. A number of cygwin-specific changes to avoid the use of text-mode files |
| and file access, and to make sure that \r is handled correctly. |
| |
| e. Fixed a bug that caused the read builtin to not return failure if an |
| attempt is made to assign to a readonly variable. |
| |
| f. Fixed a bug that caused some builtin usage messages to not be translated. |
| |
| g. Fixed a bug that caused the getopts builtin to not return failure if an |
| attempt is made to assign to a readonly variable. Now it returns 2. |
| |
| h. Fixed the cd and pwd builtins to return failure if PWD is readonly and |
| cannot be assigned to. |
| |
| i. Added code to check the return value of access(2) on Solaris systems, |
| since it returns success for executable tests (e.g., `test -x') when |
| run by root, even if the file permissions don't allow execution. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that caused directory names in words to be completed to not |
| be dequoted correctly. |
| |
| 3. New Features in Bash |
| |
| 4. New Features in Readline |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.2-beta, |
| and the previous version, bash-4.2-alpha. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused the \W prompt string escape to not add a closing |
| NULL. |
| |
| b. Fixed a bug that caused partially-quoted words that were not subject to |
| word splitting to retained quoted NULLs. |
| |
| c. Added considerable efficiency speedups when pattern matching in multibyte |
| locales by skipping multibyte character functions where possible. |
| |
| d. Added considerable speedups to variable expansion when in multibyte locales. |
| |
| e. Fixed a bug that caused the expansion of $* when there are no positional |
| parameters to cause the shell to dump core when used in a pattern |
| matching context. |
| |
| f. Fixed a bug that caused variable expansions preceding regular builtins to |
| not change the shell environment during their execution. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that made an explicit argument of 0 to yank-last-arg behave |
| as if it were a negative argument. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.2-alpha, |
| and the previous version, bash-4.1-release. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug in the parser when processing alias expansions containing |
| quoted newlines. |
| |
| b. Fixed a memory leak in associative array expansion. |
| |
| c. Fixed a bug that caused quoted here-strings to be requoted when printed. |
| |
| d. Fixed a bug in arithmetic expansion that caused the index in an array |
| expansion to be evaluated twice under certain circumstances. |
| |
| e. Fixed several bugs with the expansion and display of variables that have |
| been given attributes but not values and are technically unset. |
| |
| f. Fixed a bug that caused core dumps when using filename completion that |
| expands to a filename containing a globbing character. |
| |
| g. Fixed a bug that caused assignment statements preceding a special builtin |
| when running in Posix mode to not persist after the builtin completed |
| when the special builtin was executed in a shell function without any |
| local variables. |
| |
| h. Fixed a bug that caused a command to remain in the hash table even after |
| `hash command' did not find anything if there was already an existing |
| hashed pathname. |
| |
| i. Fixed several bugs caused by executing unsafe functions from a signal |
| handler in the cases where a signal handler is executed immediately |
| rather than setting a flag for later execution. |
| |
| j. Fixed a bug that caused some internal flag variables to be set |
| incorrectly if `read -t' timed out. |
| |
| k. Fixed a Posix compatibility issue by making sure that a backslash escaping |
| a `}' within a double-quoted ${...} parameter expansion is removed as part |
| of the parameter expansion. |
| |
| l. Fixed a bug that caused execution of a trap to overwrite PIPESTATUS. |
| |
| m. Fixed a bug that caused here documents to not be displayed correctly |
| when attached to commands inside compound commands. |
| |
| n. Fixed a bug that caused the printf builtin to use the wrong precision |
| when using the `*' modifier. |
| |
| o. Fixed a bug that caused an arriving SIGCHLD to interrupt output functions |
| like those invoked by echo or printf. |
| |
| p. Changed to use a more robust mechanism than eaccess(2) when test is |
| checking filenames for execution permission. |
| |
| q. Fixed a bug that caused spurious semicolons to be added into the command |
| history in certain cases. |
| |
| r. Fixed a bug that caused the shell to free non-allocated memory when |
| unsetting element 0 of an associative array after it was assigned |
| implicitly. |
| |
| s. Fixed a bug that could cause the shell to dump core if using the `v' |
| vi editing command on a multi-line command. |
| |
| t. Fixed a bug that left FIFOs opened by process substitutions open long |
| enough to potentially cause file descriptor exhaustion when running a |
| shell function or shell builtin. |
| |
| u. Fixed a bug that caused the history expansion functions to not recognize |
| process substitution or extended glob patterns as single words. |
| |
| v. Fixed a bug that caused restricted shells to set a restricted command's |
| exit status incorrectly. |
| |
| w. Fixed a bug that caused bash to ignore the wrong set of filenames when |
| completing a command using the `complete-filename' readline command. |
| |
| x. Fixed a bug that caused a -PID argument following a -s sig or -n sig to |
| not be interpreted as a signal specification. |
| |
| y. Changed posix-mode behavior of a parse error in a `.' script or `eval' |
| command to exit the shell under Posix-specified conditions. Previous |
| versions printed a warning. |
| |
| z. Fixed a bug in \W prompt expansion that resulted in incorrect expansion |
| in the event of overlapping strings. |
| |
| aa. Fixed a bug that caused the := parameter expansion operator to return the |
| wrong value as the result of the expansion. |
| |
| bb. When in Posix mode, a single quote is not treated specially in a |
| double-quoted ${...} expansion, unless the expansion operator is |
| # or % or the non-Posix `//', `^', and `,'. In particular, it does |
| not define a new quoting context. This is from Posix interpretation 221. |
| |
| cc. Fixed a bug that inadvertently allowed program names containing slashes |
| to be entered into the command hash table. |
| |
| dd. Fixed a bug that caused the select builtin to incorrectly compute the |
| display width of the arguments in the presence of multibyte characters. |
| |
| ee. Fixed a bug that caused bash to not change the xtrace file descriptor if |
| BASH_XTRACEFD was found in the shell environment at startup. |
| |
| ff. Fixed a memory leak in the pattern removal parameter expansion. |
| |
| gg. Fixed a bug that caused SIGINT to fail to interrupt a nested loop if the |
| loop was in a pipeline. |
| |
| hh. Fixed a problem in $(...) parsing that caused the parser to add an extra |
| space to a here-document delimiter if the first word contained a `/'. |
| |
| ii. Fixed a bug that caused functions defined with the `function' reserved |
| word to require braces around the function body. |
| |
| jj. Fixed a bug that caused bash to dump core when a variable expansion being |
| used as an array subscript failed. |
| |
| kk. Fixed a bug that caused bash to dump core if the case-modification |
| expansions were used on a variable with a null value. |
| |
| ll. Fixed a bug that caused partially-quoted strings to be split incorrectly |
| if a variable with a null value was expanded within double quotes. |
| |
| mm. The pattern substitution word expansion has been sped up dramatically |
| when running in a locale with multibyte characters. |
| |
| nn. Fixed a bug that caused history -a to not write the correct lines to |
| the history file if all the new lines in the history list were added |
| since the last time the history file was read or written. |
| |
| oo. Fixed a bug that caused completion of a word with an unclosed `` command |
| substitution to set the prompt incorrectly. |
| |
| pp. Fixed a bug that caused extended globbing patterns in $HISTIGNORE or |
| $GLOBIGNORE to be incorrectly scanned. |
| |
| qq. Fixed a bug caused by closing file descriptors 3-20 on shell startup. The |
| shell now sets them to close-on-exec. |
| |
| rr. Fixed a bug that caused the exit status of `exec file' to be set incorrectly |
| if `file' was a directory. |
| |
| ss. Fixed a bug in the `.' builtin to make a non-interactive posix-mode shell |
| exit if the file argument to `.' is not found. Prefixing exec with |
| `command' makes the shell not exit. Posix requires this behavior. |
| |
| tt. Fixed a bug that caused `sh -c 'command exec; exit 1' to hang. |
| |
| uu. Fixed a bug in $(...) command substitution parsing that caused the shell |
| to treat backslash-newline incorrectly when parsing a comment. |
| |
| vv. Fixed bug that caused brace expansion sequence generation to misbehave |
| when supplied integers greater than 2**31 - 1. |
| |
| ww. Fixed a bug that caused failure to save file descriptors for redirections |
| to corrupt shell file descriptors. |
| |
| xx. Fixed a bug that caused bash-forward-shellword to not correctly handle |
| quoted strings. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that caused the unconverted filename to be added to the list of |
| completions when the application specified filename conversion functions. |
| |
| b. Fixed a bug that caused the wrong filename to be passed to opendir when the |
| application has specified a filename dequoting function. |
| |
| c. Fixed a bug when repeating a character search in vi mode in the case where |
| there was no search to repeat. |
| |
| d. When show-all-if-ambiguous is set, the completion routines no longer insert |
| a common match prefix that is shorter than the text being completed. |
| |
| e. The full set of vi editing commands may now be used in callback mode. |
| |
| f. Fixed a bug that caused readline to not update its idea of the terminal |
| dimensions while running in `no-echo' mode. |
| |
| h. Fixed a bug that caused readline to dump core if an application called |
| rl_prep_terminal without setting rl_instream. |
| |
| i. Fixed a bug that caused meta-prefixed characters bound to incremental |
| search forward or backward to not be recognized if they were typed |
| subsequently. |
| |
| j. The incremental search code treats key sequences that map to the same |
| functions as (default) ^G, ^W, and ^Y as equivalent to those characters. |
| |
| k. Fixed a bug in menu-complete that caused it to misbehave with large |
| negative argument. |
| |
| l. Fixed a bug that caused vi-mode yank-last-arg to ring the bell when invoked |
| at the end of the line. |
| |
| 3. New Features in Bash |
| |
| a. `exec -a foo' now sets $0 to `foo' in an executable shell script without a |
| leading #!. |
| |
| b. Subshells begun to execute command substitutions or run shell functions or |
| builtins in subshells do not reset trap strings until a new trap is |
| specified. This allows $(trap) to display the caller's traps and the |
| trap strings to persist until a new trap is set. |
| |
| c. `trap -p' will now show signals ignored at shell startup, though their |
| disposition still cannot be modified. |
| |
| d. $'...', echo, and printf understand \uXXXX and \UXXXXXXXX escape sequences. |
| |
| e. declare/typeset has a new `-g' option, which creates variables in the |
| global scope even when run in a shell function. |
| |
| f. test/[/[[ have a new -v variable unary operator, which returns success if |
| `variable' has been set. |
| |
| g. Posix parsing changes to allow `! time command' and multiple consecutive |
| instances of `!' (which toggle) and `time' (which have no cumulative |
| effect). |
| |
| h. Posix change to allow `time' as a command by itself to print the elapsed |
| user, system, and real times for the shell and its children. |
| |
| j. $((...)) is always parsed as an arithmetic expansion first, instead of as |
| a potential nested command substitution, as Posix requires. |
| |
| k. A new FUNCNEST variable to allow the user to control the maximum shell |
| function nesting (recursive execution) level. |
| |
| l. The mapfile builtin now supplies a third argument to the callback command: |
| the line about to be assigned to the supplied array index. |
| |
| m. The printf builtin has a new %(fmt)T specifier, which allows time values |
| to use strftime-like formatting. |
| |
| n. There is a new `compat41' shell option. |
| |
| o. The cd builtin has a new Posix-mandated `-e' option. |
| |
| p. Negative subscripts to indexed arrays, previously errors, now are treated |
| as offsets from the maximum assigned index + 1. |
| |
| q. Negative length specifications in the ${var:offset:length} expansion, |
| previously errors, are now treated as offsets from the end of the variable. |
| |
| r. Parsing change to allow `time -p --'. |
| |
| s. Posix-mode parsing change to not recognize `time' as a keyword if the |
| following token begins with a `-'. This means no more Posix-mode |
| `time -p'. Posix interpretation 267. |
| |
| t. There is a new `lastpipe' shell option that runs the last command of a |
| pipeline in the current shell context. The lastpipe option has no |
| effect if job control is enabled. |
| |
| u. History expansion no longer expands the `$!' variable expansion. |
| |
| v. Posix mode shells no longer exit if a variable assignment error occurs |
| with an assignment preceding a command that is not a special builtin. |
| |
| w. Non-interactive mode shells exit if -u is enabled and an attempt is made |
| to use an unset variable with the % or # expansions, the `//', `^', or |
| `,' expansions, or the parameter length expansion. |
| |
| x. Posix-mode shells use the argument passed to `.' as-is if a $PATH search |
| fails, effectively searching the current directory. Posix-2008 change. |
| |
| 4. New Features in Readline |
| |
| a. The history library does not try to write the history filename in the |
| current directory if $HOME is unset. This closes a potential security |
| problem if the application does not specify a history filename. |
| |
| b. New bindable variable `completion-display-width' to set the number of |
| columns used when displaying completions. |
| |
| c. New bindable variable `completion-case-map' to cause case-insensitive |
| completion to treat `-' and `_' as identical. |
| |
| d. There are new bindable vi-mode command names to avoid readline's case- |
| insensitive matching not allowing them to be bound separately. |
| |
| e. New bindable variable `menu-complete-display-prefix' causes the menu |
| completion code to display the common prefix of the possible completions |
| before cycling through the list, instead of after. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.1-rc, |
| and the previous version, bash-4.1-beta. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused printf to not return a partial value when it |
| encountered an error while converting an integer argument. |
| |
| b. Fixed a bug that caused setting one of the compatNN options to not |
| turn off the others. |
| |
| c. The (undocumented) --wordexp option is no longer included by default. |
| |
| d. Fixed a bug in conditional command execution that caused it to not |
| correctly ignore the exit status under certain circumstances. |
| |
| e. Added a configure-time check for correctly-working asprintf/snprintf. |
| |
| f. Fixed some problems with line number calculation and display when sourcing |
| a file in an interactive shell. |
| |
| g. Fixed a bug that caused the shell to crash when using `declare -A foo=bar'. |
| |
| h. Fixed a bug that caused an off-by-one error when calculating the directories |
| to display with the PROMPT_DIRTRIM option. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that caused applications using the callback interface to not |
| react to SIGINT (or other signals) until another character arrived. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.1-beta, |
| and the previous version, bash-4.1-alpha. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug in mapfile that caused the shell to crash if it was passed the |
| name of an associative array. |
| |
| b. Fixed a bug that caused the shell to incorrectly split case patterns if |
| they contained characters in $IFS. |
| |
| c. Fixed a bug that caused the shell to set $? to the wrong value when using |
| a construct ending with a variable assignment with set -x enabled and PS4 |
| containing a command substitution. |
| |
| d. Fixed a bug that caused the shell to read commands incorrectly if an |
| expansion error occurred under certain conditions in a user-specified |
| subshell. |
| |
| e. Fixed a bug that caused the shell to set $? incorrectly if a parse error |
| occurred in an evaluation context ("eval", trap command, dot script, etc.) |
| |
| f. Fixed a bug that caused the shell to attempt command substitution |
| completion within a single-quoted string. |
| |
| g. Fixed a bug that caused the shell to insert an extra single quote during |
| word completion. |
| |
| h. Fixed a bug that caused the shell to crash if invoked with the environment |
| variable EMACS having a null value. |
| |
| i. Fixed a bug that caused bash to incorrectly report the presence of new |
| mail in a `maildir' environment. |
| |
| j. Fixed a bug that caused the shell to not recognize a here-document ending |
| delimiter inside a command substitution. |
| |
| k. Fixed a bug that caused the shell to crash when a a dynamic array variable |
| was assigned a scalar value. |
| |
| 2. Changes to Readline |
| |
| 3. New Features in Bash |
| |
| a. The mapfile/readarray builtin no longer stores the commands it invokes via |
| callbacks in the history list. |
| |
| b. There is a new `compat40' shopt option. |
| |
| c. The < and > operators to [[ do string comparisons using the current locale |
| only if the compatibility level is greater than 40 (set to 41 by default). |
| |
| 4. New Features in Readline |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.1-alpha, |
| and the previous version, bash-4.0-release. |
| |
| 1. Changes to Bash |
| |
| a. Fixed bugs in the parser involving new parsing of the commands contained |
| in command substitution when the substitution is read. |
| |
| b. Fixed a bug that caused the shell to dump core when performing programmable |
| completion using a shell function. |
| |
| c. Fixed a bug in `mapfile' that caused it to invoke callbacks at the wrong |
| time. |
| |
| d. Fixed a bug that caused the shell to dump core when listing jobs in the |
| `exit' builtin. |
| |
| e. Fixed several bugs encountered when reading subscripts in associative |
| array assignments and expansions. |
| |
| f. Fixed a bug that under some circumstances caused an associative array to |
| be converted to an indexed array. |
| |
| g. Fixed a bug that caused syntax errors and SIGINT interrupts to not set |
| $? to a value > 128. |
| |
| h. Fixed a bug that caused the shell to remove FIFOs associated with process |
| substitution inside shell functions. |
| |
| i. Fixed a bug that caused terminal attributes to not be reset when the |
| `read' builtin timed out. |
| |
| j. Fixed a bug in brace expansion that caused unwanted zero padding of the |
| expanded terms. |
| |
| k. Fixed a bug that prevented the |& construct from working as intended when |
| used with a simple command with additional redirections. |
| |
| l. Fixed a bug with the case statment ;& terminator that caused the shell to |
| dereference a NULL pointer. |
| |
| m. Fixed a bug that caused assignment statements or redirections preceding |
| a simple command name to inhibit alias expansion. |
| |
| n. Fixed the behavior of `set -u' to conform to the latest Posix interpretation: |
| every expansion of an unset variable except $@ and $* will cause the |
| shell to exit. |
| |
| o. Fixed a bug that caused double-quoted expansions of $* inside word |
| expansions like ${x#$*} to not expand properly when $IFS is empty. |
| |
| p. Fixed a bug that caused traps to set $LINENO to the wrong value when they |
| execute. |
| |
| q. Fixed a bug that caused off-by-one errors when computing history lines in |
| the `fc' builtin. |
| |
| r. Fixed a bug that caused some terminating signals to not exit the shell |
| quickly enough, forcing the kernel to send the signal (e.g., SIGSEGV) |
| multiple times. |
| |
| s. Fixed a bug that caused the shell to attempt to add empty lines to the |
| history list when reading here documents. |
| |
| t. Made some internal changes that dramatically speeds up sequential indexed |
| array access. |
| |
| u. Fixed a bug that caused the shell to write past the end of a string when |
| completing a double-quoted string ending in a backslash. |
| |
| v. Fixed a bug that caused the shell to replace too many characters when a |
| pattern match was null in a ${foo//bar} expansion. |
| |
| w. Fixed bugs in the expansion of ** that caused duplicate directory names |
| and the contents of the current directory to be omitted. |
| |
| x. Fixed a bug that caused $? to not be set correctly when referencing an |
| unset variable with set -u and set -e enabled. |
| |
| y. Fixed a bug caused by executing an external program from the DEBUG trap |
| while a pipeline was running. The effect was to disturb the pipeline |
| state, occasionally causing it to hang. |
| |
| z. Fixed a bug that caused the ** glob expansion to dump core if it |
| encountered an unsearchable directory. |
| |
| aa. Fixed a bug that caused `command -v' and `command -V' to not honor the |
| path set by the -p option. |
| |
| bb. Fixed a bug that caused brace expansion to take place too soon in some |
| compound array assignments. |
| |
| cc. Fixed a bug that caused programmable completion functions' changes to |
| READLINE_POINT to not be reflected back to readline. |
| |
| dd. Fixed a bug that caused the shell to dump core if a trap was executed |
| during a shell assignment statement. |
| |
| ee. Fixed an off-by-one error when computing the number of positional |
| parameters for the ${@:0:n} expansion. |
| |
| ff. Fixed a problem with setting COMP_CWORD for programmable completion |
| functions that could leave it set to -1. |
| |
| gg. Fixed a bug that caused the ERR trap to be triggered in some cases where |
| `set -e' would not have caused the shell to exit. |
| |
| hh. Fixed a bug that caused changes made by `compopt' to not persist past the |
| completion function in which compopt was executed. |
| |
| ii. Fixed a bug that caused the list of hostname completions to not be cleared |
| when HOSTNAME was unset. |
| |
| jj. Fixed a bug that caused variable expansion in here documents to look in |
| any temporary environment. |
| |
| kk. Bash and readline can now convert file names between precomposed and |
| decomposed Unicode on Mac OS X ("keyboard" and file system forms, |
| respectively). This affects filename completion (using new |
| rl_filename_rewrite_hook), globbing, and readline redisplay. |
| |
| ll. The ERR and EXIT traps now see a non-zero value for $? when a parser |
| error after set -e has been enabled causes the shell to exit. |
| |
| mm. Fixed a bug that in brace expansion that caused zero-prefixed terms to |
| not contain the correct number of digits. |
| |
| nn. Fixed a bug that caused the shell to free non-allocated memory when |
| unsetting an associative array which had had a value implicitly assigned |
| to index "0". |
| |
| oo. Fixed a memory leak in the ${!prefix@} expansion. |
| |
| pp. Fixed a bug that caused printf to not correctly report all write errors. |
| |
| qq. Fixed a bug that caused single and double quotes to act as delimiters |
| when splitting a command line into words for programmable completion. |
| |
| rr. Fixed a bug that caused ** globbing that caused **/path/* to match every |
| directory, not just those matching `path'. |
| |
| ss. Fixed a bug that caused the shell to dump core when running `help' without |
| arguments if the terminal width was fewer than 7 characters. |
| |
| 2. Changes to Readline |
| |
| a. The SIGWINCH signal handler now avoids calling the redisplay code if |
| one arrives while in the middle of redisplay. |
| |
| b. Changes to the timeout code to make sure that timeout values greater |
| than one second are handled better. |
| |
| c. Fixed a bug in the redisplay code that was triggered by a prompt |
| containing invisible characters exactly the width of the screen. |
| |
| d. Fixed a bug in the redisplay code encountered when running in horizontal |
| scroll mode. |
| |
| e. Fixed a bug that prevented menu completion from properly completing |
| filenames. |
| |
| f. Fixed a redisplay bug caused by a multibyte character causing a line to |
| wrap. |
| |
| g. Fixed a bug that caused key sequences of two characters to not be |
| recognized when a longer sequence identical in the first two characters |
| was bound. |
| |
| h. Fixed a bug that caused history expansion to be attempted on $'...' |
| single-quoted strings. |
| |
| i. Fixed a bug that caused incorrect redisplay when the prompt contained |
| multibyte characters in an `invisible' sequence bracketed by \[ and |
| \]. |
| |
| j. Fixed a bug that caused history expansion to short-circuit after |
| encountering a multibyte character. |
| |
| 3. New Features in Bash |
| |
| a. Here-documents within $(...) command substitutions may once more be |
| delimited by the closing right paren, instead of requiring a newline. |
| |
| b. Bash's file status checks (executable, readable, etc.) now take file |
| system ACLs into account on file systems that support them. |
| |
| c. Bash now passes environment variables with names that are not valid |
| shell variable names through into the environment passed to child |
| processes. |
| |
| d. The `execute-unix-command' readline function now attempts to clear and |
| reuse the current line rather than move to a new one after the command |
| executes. |
| |
| e. `printf -v' can now assign values to array indices. |
| |
| f. New `complete -E' and `compopt -E' options that work on the "empty" |
| completion: completion attempted on an empty command line. |
| |
| g. New complete/compgen/compopt -D option to define a `default' completion: |
| a completion to be invoked on command for which no completion has been |
| defined. If this function returns 124, programmable completion is |
| attempted again, allowing a user to dynamically build a set of completions |
| as completion is attempted by having the default completion function |
| install individual completion functions each time it is invoked. |
| |
| h. When displaying associative arrays, subscripts are now quoted. |
| |
| i. Changes to dabbrev-expand to make it more `emacs-like': no space appended |
| after matches, completions are not sorted, and most recent history entries |
| are presented first. |
| |
| j. The [[ and (( commands are now subject to the setting of `set -e' and the |
| ERR trap. |
| |
| k. The source/. builtin now removes NUL bytes from the file before attempting |
| to parse commands. |
| |
| l. There is a new configuration option (in config-top.h) that forces bash to |
| forward all history entries to syslog. |
| |
| m. A new variable $BASHOPTS to export shell options settable using `shopt' to |
| child processes. |
| |
| n. There is a new confgure option that forces the extglob option to be |
| enabled by default. |
| |
| o. New variable $BASH_XTRACEFD; when set to an integer bash will write xtrace |
| output to that file descriptor. |
| |
| p. If the optional left-hand-side of a redirection is of the form {var}, the |
| shell assigns the file descriptor used to $var or uses $var as the file |
| descriptor to move or close, depending on the redirection operator. |
| |
| q. The < and > operators to the [[ conditional command now do string |
| comparison according to the current locale. |
| |
| r. Programmable completion now uses the completion for `b' instead of `a' |
| when completion is attempted on a line like: a $(b c. |
| |
| s. Force extglob on temporarily when parsing the pattern argument to |
| the == and != operators to the [[ command, for compatibility. |
| |
| t. Changed the behavior of interrupting the wait builtin when a SIGCHLD is |
| received and a trap on SIGCHLD is set to be Posix-mode only. |
| |
| u. The read builtin has a new `-N nchars' option, which reads exactly NCHARS |
| characters, ignoring delimiters like newline. |
| |
| 4. New Features in Readline |
| |
| a. New bindable function: menu-complete-backward. |
| |
| b. In the vi insertion keymap, C-n is now bound to menu-complete by default, |
| and C-p to menu-complete-backward. |
| |
| c. When in vi command mode, repeatedly hitting ESC now does nothing, even |
| when ESC introduces a bound key sequence. This is closer to how |
| historical vi behaves. |
| |
| d. New bindable function: skip-csi-sequence. Can be used as a default to |
| consume key sequences generated by keys like Home and End without having |
| to bind all keys. |
| |
| e. New application-settable function: rl_filename_rewrite_hook. Can be used |
| to rewite or modify filenames read from the file system before they are |
| compared to the word to be completed. |
| |
| f. New bindable variable: skip-completed-text, active when completing in the |
| middle of a word. If enabled, it means that characters in the completion |
| that match characters in the remainder of the word are "skipped" rather |
| than inserted into the line. |
| |
| g. The pre-readline-6.0 version of menu completion is available as |
| "old-menu-complete" for users who do not like the readline-6.0 version. |
| |
| h. New bindable variable: echo-control-characters. If enabled, and the |
| tty ECHOCTL bit is set, controls the echoing of characters corresponding |
| to keyboard-generated signals. |
| |
| i. New bindable variable: enable-meta-key. Controls whether or not readline |
| sends the smm/rmm sequences if the terminal indicates it has a meta key |
| that enables eight-bit characters. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.0-release, |
| and the previous version, bash-4.0-rc1. |
| |
| 1. Changes to Bash |
| |
| a. Changed the message printed when setlocale(3) fails to only include the |
| strerror error text if the call changes errno. |
| |
| b. Changed trap command execution to reset the line number before running a |
| trap (except DEBUG and RETURN traps). |
| |
| c. Fixed behavior of case-modifiying word expansions to not work on |
| individual words within a variable's value. |
| |
| d. Fixed a bug that caused mapfile to not be interruptible when run in an |
| interactive shell. |
| |
| e. Fixed a bug that caused mapfile to not run callbacks for the first line |
| read. |
| |
| f. Fixed a bug that caused mapfile to not honor EOF typed in an interactive |
| shell. |
| |
| g. Fixed the coprocess reaping code to not run straight from a signal handler. |
| |
| h. Fixed a bug that caused printf -b to ignore the first % conversion specifier |
| in the format string on 64-bit systems. |
| |
| i. Fixed a bug that caused incorrect word splitting when `:', `=', or `~' |
| appeared in $IFS. |
| |
| j. Fixed a bug that caused data corruption in the programmable completion code |
| when a shell function called from a completion aborted execution. |
| |
| k. Fixed a bug that caused the CPU usage reported by the `time' builtin to be |
| capped at 100%. |
| |
| l. Changed behavior of shell when -e option is in effect to reflect consensus |
| of Posix shell standardization working group. |
| |
| m. Fixed a bug introduced in bash-4.0-alpha that caused redirections to not |
| be displayed by `type' or `declare' when appearing in functions under |
| certain circumstances. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that caused !(...) extended glob patterns to inhibit later |
| history expansion. |
| |
| b. Reworked the signal handling to avoid calling disallowed functions from a |
| signal handler. |
| |
| 3. New Features in Bash |
| |
| a. `readarray' is now a synonym for `mapfile'. |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.0-rc1, |
| and the previous version, bash-4.0-beta2. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused parsing errors when a $()-style command |
| substitution was follwed immediately by a quoted newline. |
| |
| b. Fixed a bug that caused extended shell globbing patterns beginning with |
| `*(' to not work when used with pattern substitution word expansions. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.0-beta2, |
| and the previous version, bash-4.0-beta. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused failed word expansions to set $? but not |
| PIPESTATUS. |
| |
| b. Changed filename completion to quote the tilde in a filename with a |
| leading tilde that exists in the current directory. |
| |
| c. Fixed a bug that caused a file descriptor leak when performing |
| redirections attached to a compound command. |
| |
| d. Fixed a bug that caused expansions of $@ and $* to not exit the shell if |
| the -u option was enabled and there were no posititional parameters. |
| |
| e. Fixed a bug that resulted in bash not terminating immediately if a |
| terminating signal was received while performing output. |
| |
| f. Fixed a bug that caused the shell to crash after creating 256 process |
| substitutions during word completion. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that caused redisplay errors when using prompts with invisible |
| characters and numeric arguments to a command in a multibyte locale. |
| |
| b. Fixed a bug that caused redisplay errors when using prompts with invisible |
| characters spanning more than two physical screen lines. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.0-beta, |
| and the previous version, bash-4.0-alpha. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a typo that caused a variable to be used before initialization |
| while parsing Posix-style command substitutions. |
| |
| b. Fixed a bug that caused stray ^? when the expansion of a parameter used |
| as part of a pattern removal expansion is empty, but part of a non- |
| empty string. |
| |
| c. Fixed a bug that could cause strings not converted to numbers by strtol |
| to be treated as if the conversion had been successful. |
| |
| d. The `return' builtin now accepts no options and requires a `--' before |
| a negative return value, as Posix requires. |
| |
| e. Fixed a bug that caused local variables to be created with the empty |
| string for a value rather than no value. |
| |
| f. Changed behavior so the shell now acts as if it received an interrupt |
| when a pipeline is killed by SIGINT while executing a list. |
| |
| g. Fixed a bug that caused `declare var' and `typeset var' to initialize |
| `var' to the empty string. |
| |
| h. Changed `bind' builtin to print a warning but proceed if invoked when |
| line editing is not active. |
| |
| i. Fixed a bug that caused the shell to exit when the `errexit' option is |
| set and a command in a pipeline returns a non-zero exit status. |
| |
| j. Fixed a bug that caused the shell to not run the exit trap in a command |
| run with `bash -c' under some circumstances. |
| |
| k. Fixed a bug that caused parser errors to occasionally not set $? when |
| running commands with `eval'. |
| |
| l. Fixed a bug that caused stray control characters when evaluating compound |
| array assignments containing $'\x7f' escapes. |
| |
| m. Fixed a bug that caused redirections involving file descriptor 10 as the |
| target to behave incorrectly. |
| |
| n. Fixed a bug that could cause memory to be freed multiple times when |
| assigning to COMP_WORDBREAKS. |
| |
| o. Fixed a bug that could cause NULL pointer dereferences when COMP_WORDBREAKS |
| was unset. |
| |
| 2. Changes to Readline |
| |
| 3. New Features in Bash |
| |
| a. A value of 0 for the -t option to `read' now returns success if there is |
| input available to be read from the specified file descriptor. |
| |
| b. CDPATH and GLOBIGNORE are ignored when the shell is running in privileged |
| mode. |
| |
| c. New bindable readline functions shell-forward-word and shell-backward-word, |
| which move forward and backward words delimited by shell metacharacters |
| and honor shell quoting. |
| |
| d. New bindable readline functions shell-backward-kill-word and shell-kill-word |
| which kill words backward and forward, but use the same word boundaries |
| as shell-forward-word and shell-backward-word. |
| |
| 4. New Features in Readline |
| |
| a. If the kernel supports it, readline displays special characters |
| corresponding to a keyboard-generated signal when the signal is received. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-4.0-alpha, |
| and the previous version, bash-3.2-release. |
| |
| 1. Changes to Bash |
| |
| a. Fixed several bugs in old-style `` command substitution parsing, including |
| comment parsing and quoted string handling. |
| |
| b. Fixed problems parsing arguments to the [[ command's =~ regular expression |
| matching operator: metacharacter and whitespace parsing. |
| |
| c. Fixed a bug that caused the shell to inappropriately reuse high-numbered |
| file descriptors it used internally. |
| |
| d. Fixed a bug in pattern replacement word expansions that caused a `/' as |
| the first character of an expanded pattern to be mistaken for a global |
| replacement specifier. |
| |
| e. Fixed several problems with the asprintf and snprintf replacement functions |
| that caused hangs and crashes. |
| |
| f. Fixed a bug in the calculation of the current and previous job that caused |
| it to refer to incorrect jobs. |
| |
| g. Fixed a bug in the check for the validity of a hashed command pathname that |
| caused unnecessary hash table deletions and additions. |
| |
| h. Fixed a bug that caused child processes to inherit the wrong value for $!. |
| |
| i. Fixed a bug that caused `.' to fail to read and execute commands from non- |
| regular files such as devices or named pipes. |
| |
| j. Fixed a bug in printf formatting for the %x and %X expansions that occurred |
| on some systems. |
| |
| k. Fixed a bug that caused the shell to crash when creating temporary files if |
| $TMPDIR named a non-writable directory. |
| |
| l. Fixed a bug that caused the shell to ignore $TMPDIR when creating temporary |
| files under some circumstances. |
| |
| m. Fixed a bug that caused named pipes created by process substitution to not |
| be cleaned up. |
| |
| n. Fixed a bug that caused HISTTIMEFORMAT to not be honored when it appeared |
| in the initial shell environment. |
| |
| o. Fixed several bugs in the expansion of $* and $@ (quoted and unquoted) |
| when IFS is null or contains non-whitespace characters; the same changes |
| apply to arrays subscripted with * or @. |
| |
| p. Fixed several problems with pattern substitution expansions on the |
| positional parameters and arrays subscripted with * or @ that occurred |
| when $IFS was set to the empty string. |
| |
| q. Made a change to the default locale initialization code that should |
| result in better behavior from the locale-aware library functions. |
| |
| r. Fixed a bug that caused compacting the jobs list to drop jobs. |
| |
| s. Fixed a bug that caused jumps back to the top-level processing loop from |
| a builtin command to leave the shell in an inconsistent state. |
| |
| t. Fixed a bug that caused characters that would be escaped internally to be |
| doubled when escaped with a backslash. |
| |
| u. Fixed the initialization of mailboxes to not cause maildirs to be read |
| (and stat(2) called for every message file) at shell startup. |
| |
| v. Fixed a bug that caused the shell to not display $PS2 when the read builtin |
| reads a line continued with a backslash. |
| |
| w. Fixed a bug that caused errors in word splitting when $IFS contained |
| characters used for internal quoting. |
| |
| x. Fixed bugs that caused problems with output from shell builtins not being |
| completely displayed on some systems. |
| |
| y. Fixed a bug that caused output to be lost when a redirection is acting on |
| the shell's output file descriptor. |
| |
| z. Fixed bugs caused by shell builtins not checking for all write errors. |
| |
| aa. Fixed a problem that caused the shell to dump core if expansions on the |
| pattern passed to the pattern removal word expansions resulted in expansion |
| errors. |
| |
| bb. Fixed a bug that caused bash to loop infinitely after creating and |
| waiting for 4096 jobs. |
| |
| cc. Fixed a bug that caused bash to lose the status of a background job under |
| certain circumstances. |
| |
| dd. Fixed a bug that caused bash to not look in the temporary environment |
| when performing variable lookup under certain circumstances. |
| |
| ee. Fixed a bug that caused bash to close file descriptors greater than 10 |
| when they were used in redirections. |
| |
| ff. Fixed a problem that caused the shell to attempt to read from the standard |
| input when called as `bash -i script'. |
| |
| gg. Fixed a memory leak and variable initialization problems when the -v option |
| was supplied to `printf' that could cause incorrect results. |
| |
| hh. Fixed a bug that caused the `read' builtin to count bytes when the -n option |
| was supplied, rather than (possibly multibyte) characters. |
| |
| ii. Fixed a bug when displaying a function due to not converting the function |
| to an external form. |
| |
| jj. Changed job control initialization to ensure that the shell has a tty |
| as its controlling terminal before enabling job control. |
| |
| kk. Fixed a bug with the `test' builtin that caused it to misinterpret |
| arguments beginning with `-' but containing more than one character. |
| |
| ll. Fixed bug that could cause the shell to dump core in certain cases where |
| a command sets the SIGINT disposition to the default. |
| |
| mm. Fixed a bug in the pattern replacement (affecting both word expansion |
| and the `fc' builtin) that occurred when the pattern and replacement |
| strings were empty. |
| |
| nn. Fixed a bug that caused an arithmetic evaluation error to disable all |
| further evaluation. |
| |
| oo. Fixed a bug in pathname expansion that caused it to interpret backslashes |
| in the pathname as quoting characters. |
| |
| pp. Fixed a bug in the replacement getcwd() implementation that could cause |
| memory to be overwritten. |
| |
| qq. When in Posix mode, the `ulimit' builtin now uses a block size of 512 for |
| the `-c' and `-f' options. |
| |
| rr. Brace expansion now allows process substitutions to pass through unchanged. |
| |
| ss. Fixed a problem in the command name completion code to avoid quoting |
| escaped special characters twice when the command name begins with a tilde. |
| |
| tt. Fixed a problem in the printf builtin that resulted in single-byte |
| output for the "'" escape, even when using multibyte characters. |
| |
| uu. Fixed a bug that caused the failure exit status to be lost when redirections |
| attached to a compound command failed. |
| |
| vv. Fixed a bug that caused the internal random number generator to not be |
| re-seeded correctly when creating a subshell. |
| |
| ww. Fixed a bug that could cause the bash replacement getcwd to overwrite |
| memory. |
| |
| xx. Fixed a bug that caused the shell to not receive SIGINT if it was sent |
| while the shell was waiting for a command substitution to terminate, and |
| make sure the exit status is correct when it does. |
| |
| yy. Fixed a bug that resulted in the second and subsequent children spawned |
| by a shell begun to run a command substitution being placed into the |
| wrong process group. |
| |
| zz. Fixed a bug that caused the results of successful tilde expansion to be |
| subject to pathname expansion and word splitting. |
| |
| aaa. Fixed a bug that could cause the shell to hang if it encountered an |
| error that caused it to jump back to the top processing loop during a |
| command substitution or `eval' command. |
| |
| bbb. Fixed a bug that caused the `read' builtin to use the tty's attributes |
| instead of those of the file descriptor passed with the -u option when |
| processing the -n and -d options. |
| |
| ccc. Fixed a bug that caused incorrect expansion of ${array[@]:foo} if the |
| first character of $IFS was not whitespace. |
| |
| ddd. Fixed a bug that occurred when scanning for the ending delimiter of a |
| ${parameter/pat/sub} expansion. |
| |
| eee. Fixed a bug that caused the shell to inappropriately expand command |
| substitutions in words when expanding directory names for completion. |
| |
| fff. Fixed a bug that caused the `fc' builtin to look too far back in the |
| history list under certain circumstances. |
| |
| ggg. Fixed a bug that caused a shell running in Posix mode to search $PWD for |
| a file specified as an argument to source/. when the file was not found |
| in $PATH. |
| |
| hhh. Fixed a bug that caused the shell to modify the case of a command word |
| found via command completion when the shell was performing case- |
| insensitive completion. |
| |
| iii. Fixed a bug that caused the shell to search $PATH for an argument to |
| source/. even when it contained a `/'. |
| |
| jjj. Fixed a bug that caused brace expansion to misorder expansions when the |
| locale did not have a collating order like aAbBcC...zZ. |
| |
| kkk. Fixed a bug that did not allow `set +o history' to have any effect when |
| run in a startup file or from a sourced file. |
| |
| lll. Fixed a bug with the precedence of the ?: conditional arithmetic operator. |
| |
| mmm. Fixed a bug that caused side effects of temporary variable assignments |
| to persist in the shell environment. |
| |
| nnn. Fixed a bug that caused the terminal to be left in non-canonical mode |
| when using editing commands that invoke the an editor on the current |
| command line. |
| |
| ooo. Fixed a bug that caused globbing characters and characters in $IFS to not |
| be quoted appropriately when displaying assignment statements. |
| |
| ppp. Fixed a bug that caused the `-e' option to be inherited when sourcing a |
| file or evaluating a command with `eval' even if the return value of the |
| command was supposed to be ignored. |
| |
| qqq. Fixed a bug that caused the shell to attempt to created variables with |
| invalid names if such names appeared in the initial environment. |
| |
| rrr. Fixed a bug with quote removal in strings where the final character is a |
| backslash. |
| |
| sss. Fixed a bug that caused the effects of special variables to persist even |
| when the variables were unset as part of the shell reinitializing itself |
| to execute a shell script. |
| |
| ttt. Fixed a bug that caused the history to not be saved after `history -c' or |
| `history -d' was executed until a sufficient number of commands had been |
| saved to the history. |
| |
| uuu. Bash now parses command substitutions according to Posix rules: parsing |
| the command contained in $() to find the closing delimiter. |
| |
| vvv. Fixed a bug that caused traps on SIGCHLD set in a SIGCHLD handler to |
| not persist. |
| |
| www. Fixed a bug that didn't allow SIGCHLD to interrupt the `wait' builtin |
| as Posix specifies. |
| |
| xxx. Invalid numeric arguments to shell builtins no longer cause the shell to |
| short-circuit any executing compound command. |
| |
| yyy. Fixed a bug that caused the exit status to be lost when `break' was |
| used to short-circuit a loop's execution. |
| |
| zzz. Fixed a bug that caused stray ^? characters to be left in expansions of |
| "${array[*]}". |
| |
| aaaa. Bash now prints better error messages for here documents terminated by |
| EOF and for identifying the incorrect token in an invalid arithmetic |
| expression. |
| |
| bbbb. Fixed a bug in the variable length word expansion that caused it to |
| incorrectly calculate the number of multibyte characters. |
| |
| cccc. Fixed a race condition that could result in the top-level shell setting |
| the terminal's process group to an incorrect value if the process |
| group was changed by a child of a child of the shell. |
| |
| dddd. Fixed a bug that caused here documents belonging to commands within a |
| compound command to be displayed in a syntactially-incorrect form, which |
| prevented them from being re-read as input. |
| |
| eeee. The shell displays more warnings about failures to set the locale. |
| |
| ffff. Fixed a bug that caused the body of a here-document to not be saved to |
| the history list. |
| |
| gggg. Fixed a bug that caused configure to incorrectly conclude that FreeBSD |
| had /dev/fd available, resulting in problems with process substitution. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a number of redisplay errors in environments supporting multibyte |
| characters. |
| |
| b. Fixed bugs in vi command mode that caused motion commands to inappropriately |
| set the mark. |
| |
| c. When using the arrow keys in vi insertion mode, readline allows movement |
| beyond the current end of the line (unlike command mode). |
| |
| d. Fixed bugs that caused readline to loop when the terminal has been taken |
| away and reads return -1/EIO. |
| |
| e. Fixed bugs in redisplay occurring when displaying prompts containing |
| invisible characters. |
| |
| f. Fixed a bug that caused the completion append character to not be reset to |
| the default after an application-specified completion function changed it. |
| |
| g. Fixed a problem that caused incorrect positioning of the cursor while in |
| emacs editing mode when moving forward at the end of a line while using |
| a locale supporting multibyte characters. |
| |
| h. Fixed an off-by-one error that caused readline to drop every 511th |
| character of buffered input. |
| |
| i. Fixed a bug that resulted in SIGTERM not being caught or cleaned up. |
| |
| j. Fixed redisplay bugs caused by multiline prompts with invisible characters |
| or no characters following the final newline. |
| |
| k. Fixed redisplay bug caused by prompts consisting solely of invisible |
| characters. |
| |
| l. Fixed a bug in the code that buffers characters received very quickly in |
| succession which caused characters to be dropped. |
| |
| m. Fixed a bug that caused readline to reference uninitialized data structures |
| if it received a SIGWINCH before completing initialzation. |
| |
| n. Fixed a bug that caused the vi-mode `last command' to be set incorrectly |
| and therefore unrepeatable. |
| |
| o. Fixed a bug that caused readline to disable echoing when it was being used |
| with an output file descriptor that was not a terminal. |
| |
| p. Readline now blocks SIGINT while manipulating internal data structures |
| during redisplay. |
| |
| q. Fixed a bug in redisplay that caused readline to segfault when pasting a |
| very long line (over 130,000 characters). |
| |
| r. Fixed bugs in redisplay when using prompts with no visible printing |
| characters. |
| |
| 3. New Features in Bash |
| |
| a. When using substring expansion on the positional parameters, a starting |
| index of 0 now causes $0 to be prefixed to the list. |
| |
| b. The `help' builtin now prints its columns with entries sorted vertically |
| rather than horizontally. |
| |
| c. There is a new variable, $BASHPID, which always returns the process id of |
| the current shell. |
| |
| d. There is a new `autocd' option that, when enabled, causes bash to attempt |
| to `cd' to a directory name that is supplied as the first word of a |
| simple command. |
| |
| e. There is a new `checkjobs' option that causes the shell to check for and |
| report any running or stopped jobs at exit. |
| |
| f. The programmable completion code exports a new COMP_TYPE variable, set to |
| a character describing the type of completion being attempted. |
| |
| g. The programmable completion code exports a new COMP_KEY variable, set to |
| the character that caused the completion to be invoked (e.g., TAB). |
| |
| h. If creation of a child process fails due to insufficient resources, bash |
| will try again several times before reporting failure. |
| |
| i. The programmable completion code now uses the same set of characters as |
| readline when breaking the command line into a list of words. |
| |
| j. The block multiplier for the ulimit -c and -f options is now 512 when in |
| Posix mode, as Posix specifies. |
| |
| k. Changed the behavior of the read builtin to save any partial input received |
| in the specified variable when the read builtin times out. This also |
| results in variables specified as arguments to read to be set to the empty |
| string when there is no input available. When the read builtin times out, |
| it returns an exit status greater than 128. |
| |
| l. The shell now has the notion of a `compatibility level', controlled by |
| new variables settable by `shopt'. Setting this variable currently |
| restores the bash-3.1 behavior when processing quoted strings on the rhs |
| of the `=~' operator to the `[[' command. |
| |
| m. The `ulimit' builtin now has new -b (socket buffer size) and -T (number |
| of threads) options. |
| |
| n. The -p option to `declare' now displays all variable values and attributes |
| (or function values and attributes if used with -f). |
| |
| o. There is a new `compopt' builtin that allows completion functions to modify |
| completion options for existing completions or the completion currently |
| being executed. |
| |
| p. The `read' builtin has a new -i option which inserts text into the reply |
| buffer when using readline. |
| |
| q. A new `-E' option to the complete builtin allows control of the default |
| behavior for completion on an empty line. |
| |
| r. There is now limited support for completing command name words containing |
| globbing characters. |
| |
| s. Changed format of internal help documentation for all builtins to roughly |
| follow man page format. |
| |
| t. The `help' builtin now has a new -d option, to display a short description, |
| and a -m option, to print help information in a man page-like format. |
| |
| u. There is a new `mapfile' builtin to populate an array with lines from a |
| given file. |
| |
| v. If a command is not found, the shell attempts to execute a shell function |
| named `command_not_found_handle', supplying the command words as the |
| function arguments. |
| |
| w. There is a new shell option: `globstar'. When enabled, the globbing code |
| treats `**' specially -- it matches all directories (and files within |
| them, when appropriate) recursively. |
| |
| x. There is a new shell option: `dirspell'. When enabled, the filename |
| completion code performs spelling correction on directory names during |
| completion. |
| |
| y. The `-t' option to the `read' builtin now supports fractional timeout |
| values. |
| |
| z. Brace expansion now allows zero-padding of expanded numeric values and |
| will add the proper number of zeroes to make sure all values contain the |
| same number of digits. |
| |
| aa. There is a new bash-specific bindable readline function: `dabbrev-expand'. |
| It uses menu completion on a set of words taken from the history list. |
| |
| bb. The command assigned to a key sequence with `bind -x' now sets two new |
| variables in the environment of the executed command: READLINE_LINE_BUFFER |
| and READLINE_POINT. The command can change the current readline line |
| and cursor position by modifying READLINE_LINE_BUFFER and READLINE_POINT, |
| respectively. |
| |
| cc. There is a new &>> redirection operator, which appends the standard output |
| and standard error to the named file. |
| |
| dd. The parser now understands `|&' as a synonym for `2>&1 |', which redirects |
| the standard error for a command through a pipe. |
| |
| ee. The new `;&' case statement action list terminator causes execution to |
| continue with the action associated with the next pattern in the |
| statement rather than terminating the command. |
| |
| ff. The new `;;&' case statement action list terminator causes the shell to |
| test the next set of patterns after completing execution of the current |
| action, rather than terminating the command. |
| |
| gg. The shell understands a new variable: PROMPT_DIRTRIM. When set to an |
| integer value greater than zero, prompt expansion of \w and \W will |
| retain only that number of trailing pathname components and replace |
| the intervening characters with `...'. |
| |
| hh. There are new case-modifying word expansions: uppercase (^[^]) and |
| lowercase (,[,]). They can work on either the first character or |
| array element, or globally. They accept an optional shell pattern |
| that determines which characters to modify. There is an optionally- |
| configured feature to include capitalization operators. |
| |
| ii. The shell provides associative array variables, with the appropriate |
| support to create, delete, assign values to, and expand them. |
| |
| jj. The `declare' builtin now has new -l (convert value to lowercase upon |
| assignment) and -u (convert value to uppercase upon assignment) options. |
| There is an optionally-configurable -c option to capitalize a value at |
| assignment. |
| |
| kk. There is a new `coproc' reserved word that specifies a coprocess: an |
| asynchronous command run with two pipes connected to the creating shell. |
| Coprocs can be named. The input and output file descriptors and the |
| PID of the coprocess are available to the calling shell in variables |
| with coproc-specific names. |
| |
| 4. New Features in Readline |
| |
| a. A new variable, rl_sort_completion_matches; allows applications to inhibit |
| match list sorting (but beware: some things don't work right if |
| applications do this). |
| |
| b. A new variable, rl_completion_invoking_key; allows applications to discover |
| the key that invoked rl_complete or rl_menu_complete. |
| |
| c. The functions rl_block_sigint and rl_release_sigint are now public and |
| available to calling applications who want to protect critical sections |
| (like redisplay). |
| |
| d. The functions rl_save_state and rl_restore_state are now public and |
| available to calling applications; documented rest of readline's state |
| flag values. |
| |
| e. A new user-settable variable, `history-size', allows setting the maximum |
| number of entries in the history list. |
| |
| f. There is a new implementation of menu completion, with several improvements |
| over the old; the most notable improvement is a better `completions |
| browsing' mode. |
| |
| g. The menu completion code now uses the rl_menu_completion_entry_function |
| variable, allowing applications to provide their own menu completion |
| generators. |
| |
| h. There is support for replacing a prefix of a pathname with a `...' when |
| displaying possible completions. This is controllable by setting the |
| `completion-prefix-display-length' variable. Matches with a common prefix |
| longer than this value have the common prefix replaced with `...'. |
| |
| i. There is a new `revert-all-at-newline' variable. If enabled, readline will |
| undo all outstanding changes to all history lines when `accept-line' is |
| executed. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.2-release, |
| and the previous version, bash-3.2-beta. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused the temporary environment passed to a command to |
| affect the shell's environment under certain circumstances. |
| |
| b. Fixed a bug in the printf builtin that caused the %q format specifier to |
| ignore empty string arguments. |
| |
| c. Improved multibyte character environment detection at configuration time. |
| |
| d. Fixed a bug in the read builtin that left spurious escape characters in the |
| input after processing backslashes when assigning to an array variable. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a redisplay bug that occurred in multibyte-capable locales when the |
| prompt was one character longer than the screen width. |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.2-beta, |
| and the previous version, bash-3.2-alpha. |
| |
| 1. Changes to Bash |
| |
| a. Changed the lexical analyzer to treat locale-specific blank characters as |
| white space. |
| |
| b. Fixed a bug in command printing to avoid confusion between redirections and |
| process substitution. |
| |
| c. Fixed problems with cross-compiling originating from inherited environment |
| variables. |
| |
| d. Added write error reporting to printf builtin. |
| |
| e. Fixed a bug in the variable expansion code that could cause a core dump in |
| a multi-byte locale. |
| |
| f. Fixed a bug that caused substring expansion of a null string to return |
| incorrect results. |
| |
| g. BASH_COMMAND now retains its previous value while executing commands as the |
| result of a trap, as the documentation states. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug with prompt redisplay in a multi-byte locale to avoid redrawing |
| the prompt and input line multiple times. |
| |
| b. Fixed history expansion to not be confused by here-string redirection. |
| |
| c. Readline no longer treats read errors by converting them to newlines, as |
| it does with EOF. This caused partial lines to be returned from readline(). |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.2-alpha, |
| and the previous version, bash-3.1-release. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a source bug that caused the minimal configuration to not compile. |
| |
| b. Fixed memory leaks in error handling for the `read' builtin. |
| |
| c. Changed the [[ and (( compound commands to set PIPESTATUS with their exit |
| status. |
| |
| d. Fixed some parsing problems with compound array assignments. |
| |
| e. Added additional configuration changes for: NetBSD (incomplete multibyte |
| character support) |
| |
| f. Fixed two bugs with local array variable creation when shadowing a variable |
| of the same name from a previous context. |
| |
| g. Fixed the `read' builtin to restore the correct set of completion functions |
| if a timeout occurs. |
| |
| h. Added code to defer the initialization of HISTSIZE (and its stifling of the |
| history list) until the history file is loaded, allowing a startup file to |
| override the default value. |
| |
| i. Tightened up the arithmetic expression parsing to produce better error |
| messages when presented with invalid operators. |
| |
| j. Fixed the cross-compilation support to build the signal list at shell |
| invocation rather than compile time if cross-compiling. |
| |
| k. Fixed multibyte support for non-gcc compilers (or compilers that do not |
| allow automatic array variable sizing based on a non-constant value). |
| |
| l. Several fixes to the code that manages the list of terminated jobs and |
| their exit statuses, and the list of active and recently-terminated jobs |
| to avoid pid aliasing/wraparound and allocation errors. |
| |
| m. Fixed a problem that allowed scripts to die due to SIGINT while waiting |
| for children, even when started in the background or otherwise ignoring |
| SIGINT. |
| |
| n. Fixed a bug that caused shells invoked as -/bin/bash from not being |
| recognized as login shells. |
| |
| o. Fixed a problem that caused shells in the background to give the terminal |
| to a process group other than the foreground shell process group. |
| |
| p. Fixed a problem with extracting the `varname' in ${#varname}. |
| |
| q. Fixed the code that handles SIGQUIT to not exit immediately -- thereby |
| calling functions that may not be called in a signal handler context -- |
| but set a flag and exit afterward (like SIGINT). |
| |
| r. Changed the brace expansion code to skip over braces that don't begin a |
| valid matched brace expansion construct. |
| |
| s. Fixed `typeset' and `declare' to not require that their shell function |
| operands to be valid shell identifiers. |
| |
| t. Changed `test' to use access(2) with a temporary uid/euid swap when testing |
| file attributes and running setuid, and access(2) in most other cases. |
| |
| u. Changed completion code to not attempt command name completion on a line |
| consisting solely of whitespace when no_empty_command_completion is set. |
| |
| v. The `hash' builtin now prints nothing in posix mode when the hash table is |
| empty, and prints a message to that effect to stdout instead of stderr |
| when not in posix mode. |
| |
| w. Fixed a bug in the extended pattern matching code that caused it to fail to |
| match periods with certain patterns. |
| |
| x. Fixed a bug that caused the shell to dump core when performing filename |
| generation in directories with thousands of files. |
| |
| y. Returned to the original Bourne shell rules for parsing ``: no recursive |
| parsing of embedded quoted strings or ${...} constructs. |
| |
| z. The inheritence of the DEBUG, RETURN, and ERR traps is now dependent only |
| on the settings of the `functrace' and `errtrace' shell options, rather |
| than whether or not the shell is in debugging mode. |
| |
| aa. Fixed a problem with $HOME being converted to ~ in the expansion of |
| members of the DIRSTACK array. |
| |
| bb. Fixed a problem with quoted arguments to arithmetic expansions in certain |
| constructs. |
| |
| cc. The command word completion code now no longer returns matching directories |
| while searching $PATH. |
| |
| dd. Fixed a bug with zero-padding and precision handling in snprintf() |
| replacement. |
| |
| ee. Fixed a bug that caused the command substitution code not to take embedded |
| shell comments into account. |
| |
| ff. Fixed a bug that caused $((...);(...)) to be misinterpreted as an |
| arithmetic substitution. |
| |
| gg. Fixed a bug in the prompt expansion code that inappropriately added a |
| \001 before a \002 under certain circumstances. |
| |
| hh. Fixed a bug that caused `unset LANG' to not properly reset the locale |
| (previous versions would set the locale back to what it was when bash |
| was started rather than the system's "native" locale). |
| |
| ii. Fixed a bug that could cause file descriptors > 10 to not be closed even |
| when closed explicitly by a script. |
| |
| jj. Fixed a bug that caused single quotes to be stripped from ANSI-C quoting |
| inside double-quoted command substitutions. |
| |
| kk. Fixed a bug that could cause core dumps when `return' was executed as the |
| last element of a pipeline inside a shell function. |
| |
| ll. Fixed a bug that caused DEBUG trap strings to overwrite commands stored in |
| the jobs list. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a problem that caused segmentation faults when using readline in |
| callback mode and typing consecutive DEL characters on an empty line. |
| |
| b. Fixed several redisplay problems with multibyte characters, all having to |
| do with the different code paths and variable meanings between single-byte |
| and multibyte character redisplay. |
| |
| c. Fixed a problem with key sequence translation when presented with the |
| sequence \M-\C-x. |
| |
| d. Fixed a problem that prevented the `a' command in vi mode from being |
| undone and redone properly. |
| |
| e. Fixed a problem that prevented empty inserts in vi mode from being undone |
| properly. |
| |
| f. Fixed a problem that caused readline to initialize with an incorrect idea |
| of whether or not the terminal can autowrap. |
| |
| g. Fixed output of key bindings (like bash `bind -p') to honor the setting of |
| convert-meta and use \e where appropriate. |
| |
| h. Changed the default filename completion function to call the filename |
| dequoting function if the directory completion hook isn't set. This means |
| that any directory completion hooks need to dequote the directory name, |
| since application-specific hooks need to know how the word was quoted, |
| even if no other changes are made. |
| |
| i. Fixed a bug with creating the prompt for a non-interactive search string |
| when there are non-printing characters in the primary prompt. |
| |
| j. Fixed a bug that caused prompts with invisible characters to be redrawn |
| multiple times in a multibyte locale. |
| |
| k. Fixed a bug that could cause the key sequence scanning code to return the |
| wrong function. |
| |
| l. Fixed a problem with the callback interface that caused it to fail when |
| using multi-character keyboard macros. |
| |
| m. Fixed a bug that could cause a core dump when an edited history entry was |
| re-executed under certain conditions. |
| |
| n. Fixed a bug that caused readline to reference freed memory when attmpting |
| to display a portion of the prompt. |
| |
| 3. New Features in Bash |
| |
| a. Changed the parameter pattern replacement functions to not anchor the |
| pattern at the beginning of the string if doing global replacement - that |
| combination doesn't make any sense. |
| |
| b. When running in `word expansion only' mode (--wordexp option), inhibit |
| process substitution. |
| |
| c. Loadable builtins now work on MacOS X 10.[34]. |
| |
| d. Shells running in posix mode no longer set $HOME, as POSIX requires. |
| |
| e. The code that checks for binary files being executed as shell scripts now |
| checks only for NUL rather than any non-printing character. |
| |
| f. Quoting the string argument to the [[ command's =~ operator now forces |
| string matching, as with the other pattern-matching operators. |
| |
| 4. New Features in Readline |
| |
| a. Calling applications can now set the keyboard timeout to 0, allowing |
| poll-like behavior. |
| |
| b. The value of SYS_INPUTRC (configurable at compilation time) is now used as |
| the default last-ditch startup file. |
| |
| c. The history file reading functions now allow windows-like \r\n line |
| terminators. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.1-release, |
| and the previous version, bash-3.1-rc2. |
| |
| 1. Changes to Readline |
| |
| a. Several changes to the multibyte redisplay code to fix problems with |
| prompts containing invisible characters. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.1-rc2, |
| and the previous version, bash-3.1-rc1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused a DEBUG trap to overwrite a command string that's |
| eventually attached to a background job. |
| |
| b. Changed some code so that filenames with leading tildes with spaces in the |
| name aren't tilde-expanded by the bash completion code. |
| |
| c. Fixed a bug that caused the pushd builtin to fail to change to |
| directories with leading `-'. |
| |
| d. Fixed a small memory leak in the programmable completion code. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a redisplay bug caused by moving the cursor vertically to a line |
| with invisible characters in the prompt in a multibyte locale. |
| |
| b. Fixed a bug that could cause the terminal special chars to be bound in the |
| wrong keymap in vi mode. |
| |
| 3. New Features in Bash |
| |
| a. If compiled for strict POSIX conformance, LINES and COLUMNS may now |
| override the true terminal size. |
| |
| 4. New Features in Readline |
| |
| a. A new external application-controllable variable that allows the LINES |
| and COLUMNS environment variables to set the window size regardless of |
| what the kernel returns. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.1-rc1, |
| and the previous version, bash-3.1-beta1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that could cause core dumps due to accessing the current |
| pipeline while in the middle of modifying it. |
| |
| b. Fixed a bug that caused pathnames with backslashes still quoting characters |
| to be passed to opendir(). |
| |
| c. Command word completion now obeys the setting of completion-ignore-case. |
| |
| d. Fixed a problem with redirection that caused file descriptors greater than |
| 2 to be inappropriately marked as close-on-exec. |
| |
| e. In Posix mode, after `wait' is called to wait for a particular process |
| explicitly, that process is removed from the list of processes known to |
| the shell, and subsequent attempts to wait for it return errors. |
| |
| f. Fixed a bug that caused extended pattern matching to incorrectly scan |
| backslash-escaped pattern characters. |
| |
| g. Fixed a synchronization problem that could cause core dumps when handling |
| a SIGWINCH. |
| |
| h. Fixed a bug that caused an unmatched backquote to be accepted without an |
| error when processing here documents. |
| |
| i. Fixed a small memory leak in the `cd' builtin. |
| |
| j. Fix for MacOS X so it gets the values for the HOSTTYPE, MACHTYPE, and |
| OSTYPE variables at build time, to support universal binaries. |
| |
| k. Fixed a bug that could cause an exit trap to return the exit status of |
| the trap command rather than the status as it was before the trap was |
| run as the shell's exit status. |
| |
| 2. New Features in Bash |
| |
| 3. Changes to Readline |
| |
| a. Fixed a bug that caused reversing the incremental search direction to |
| not work correctly. |
| |
| b. Fixed the vi-mode `U' command to only undo up to the first time insert mode |
| was entered, as Posix specifies. |
| |
| c. Fixed a bug in the vi-mode `r' command that left the cursor in the wrong |
| place. |
| |
| 4. New Features in Readline |
| |
| a. New application-callable auxiliary function, rl_variable_value, returns |
| a string corresponding to a readline variable's value. |
| |
| b. When parsing inputrc files and variable binding commands, the parser |
| strips trailing whitespace from values assigned to boolean variables |
| before checking them. |
| |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.1-beta1, |
| and the previous version, bash-3.1-alpha1. |
| |
| 1. Changes to Bash |
| |
| a. Added some system-specific signal names. |
| |
| b. Fixed a typo in the ulimit builtin to make `x' the right option to |
| maniuplate the limit on file locks. |
| |
| c. Fixed a problem with using += to append to index 0 of an array variable |
| when not using subscript syntax. |
| |
| d. A few changes to configure.in to remove calls to obsolete or outdated |
| macros. |
| |
| e. Make sure changes to variables bash handles specially (e.g., LC_ALL) are |
| made when the variable is set in the temporary environment to a command. |
| |
| f. Make sure changes to variables bash handles specially (e.g., LC_ALL) are |
| made when the variable is modified using `printf -v'. |
| |
| g. The export environment is now remade on cygwin when HOME is changed, so |
| DLLs bash is linked against pick up the new value. This fixes problems |
| with tilde expansion when linking against and already-installed readline. |
| |
| h. Small fix to the logic for performing tilde expansion in posix mode, so |
| expansion on the right-hand side of an assignment statement takes place. |
| |
| i. Fixed a bug that prevented redirections associated with a shell function |
| from being executed when in a subshell. |
| |
| j. Fixed `source' and `.' builtins to not require an executable file when |
| searching $PATH for a file to source. |
| |
| k. Fixed a bug that caused incorrect word splitting in a function when IFS |
| was declared local, then unset. |
| |
| l. Fixed a problem with the `kill' builtin that prevented sending signals |
| to a process group under certain circumstances when providing a pid < 0. |
| |
| m. When in POSIX mode, `pwd' now checks that the value it prints is the same |
| directory as `.', even when displaying $PWD. |
| |
| n. Fixed a problem with the `read' builtin when reading a script from standard |
| input and reading data from the same file. |
| |
| o. Fixed a problem with the `type' and `command' builtins that caused absolute |
| pathnames to be displayed incorrectly. |
| |
| p. Some changes to the `bg' builtin for POSIX conformance. |
| |
| q. The `fc' builtin now removes the `fc' command that caused it to invoke an |
| editor on specified history entries from the history entirely, rather than |
| simply ignoring it. |
| |
| r. When in POSIX mode, the `v' command in vi editing mode simply invokes vi |
| on the current command, rather than checking $FCEDIT and $EDITOR. |
| |
| s. Fixed a small memory leak in the pathname canonicalization code. |
| |
| t. Fixed a bug that caused the expanded value of a $'...' string to be |
| incorrectly re-quoted if it occurred within a double-quoted ${...} |
| parameter expansion. |
| |
| u. Restored default emacs-mode key binding of M-TAB to dynamic-complete-history. |
| |
| v. Fixed a bug that caused core dumps when interrupting loops running builtins |
| on some systems. |
| |
| w. Make sure that some of the functions bash provides replacements for are |
| not cpp defines. |
| |
| x. The code that scans embedded commands for the parser (`...` and $(...)) is |
| now more aware of embedded comments and their effect on quoted strings. |
| |
| y. Changed the `-n' option to the `history' builtin to not reset the number of |
| history lines read in the current session after reading the new lines from |
| the history file if the history is being appended when it is written to |
| the file, since the appending takes care of the problem that the adjustment |
| was intended to solve. |
| |
| z. Improved the error message displayed when a shell script fails to execute |
| because the environment and size of command line arguments are too large. |
| |
| aa. A small fix to make sure that $HISTCMD is evaluated whenever the shell is |
| saving commands to the history list, not just when HISTSIZE is defined. |
| |
| 2. Changes to Readline |
| |
| a. The `change-case' command now correctly changes the case of multibyte |
| characters. |
| |
| b. Changes to the shared library construction scripts to deal with Windows |
| DLL naming conventions for Cygwin. |
| |
| c. Fixed the redisplay code to avoid core dumps resulting from a poorly-timed |
| SIGWINCH. |
| |
| d. Fixed the non-incremental search code in vi mode to dispose of any current |
| undo list when copying a line from the history into the current editing |
| buffer. |
| |
| e. The variable assignment code now ignores whitespace at the end of lines |
| when assigning to boolean variables. |
| |
| f. The `C-w' binding in incremental search now understands multibyte |
| characters. |
| |
| 3. New Features in Bash |
| |
| a. A new configuration option, `--enable-strict-posix-default', which will |
| build bash to be POSIX conforming by default. |
| |
| 4. New Features in Readline |
| |
| a. If the rl_completion_query_items is set to a value < 0, readline never |
| asks the user whether or not to view the possible completions. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.1-alpha1, |
| and the previous version, bash-3.0-release. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused bash to crash if referencing an unset local array. |
| |
| b. Fixed a problem that caused tilde expansion to not be performed before |
| attempting globbing word completion. |
| |
| c. Fixed an incompatibility so that a first argument to trap that's a valid |
| signal number will be trated as a signal rather than a command to execute. |
| |
| d. Fixed ${#word} expansion to correctly compute the length of a string |
| containing multibyte characters. |
| |
| e. Fixed a bug that caused bash to not pass the correct flags for signal |
| disposition to child processes. |
| |
| f. Fixed a bug that caused `fc -l' to list one too many history entries. |
| |
| g. Some fixes to `fc' for POSIX conformance. |
| |
| h. Some fixes to job status display for POSIX conformance. |
| |
| i. Fixed a bug that caused `command -v' to display output if a command was not |
| found -- it should be silent. |
| |
| j. In POSIX mode, `type' and `command -[vV]' do not report non-executable |
| files, even if the shell will attempt to execute them. |
| |
| k. Fixed a bug that caused the `==' operator to the [[ command to not attempt |
| extended pattern matching. |
| |
| l. Fixed the brace expansion code to handle characters whose value exceeds 128. |
| |
| m. Fixed `printf' to handle strings with a leading `\0' whose length is |
| non-zero. |
| |
| n. Fixed a couple of problems with brace expansion where `${' was handled |
| incorrectly. |
| |
| o. Fixed off-by-one error when calculating the upper bound of `offset' when |
| processing the ${array[@]:offset:length} expansion. |
| |
| p. System-specific configuration changes for: FreeBSD 5.x, Interix, MacOS X |
| 10.4, Linux 2.4+ kernels, Linux 3.x kernels, Dragonfly BSD, QNX 6.x, |
| Cygwin |
| |
| q. Fixed a bug that caused the shell to ignore the status of the rightmost |
| command in a pipeline when the `pipefail' option was enabled. |
| |
| r. Fixed a completion bug that caused core dumps when expanding a directory |
| name. |
| |
| s. Fixed a bug that prevented `hash -d' from removing commands from the hash |
| table. |
| |
| t. Fixed word splitting to avoid really bad quadratic performance when |
| expanding long lists. |
| |
| u. Fixed a bug that caused negative offsets in substring expansion to use the |
| wrong values. |
| |
| v. Fixed a bug in printf that caused it to not return failure on write errors. |
| |
| w. Fixed a bug that caused commands in subshells to not be properly timed. |
| |
| x. The shell parser no longer attempts to parse a compound assignment specially |
| unless in a position where an assignment statement is acceptable or parsing |
| arguments to a builtin that accepts assignment statements. |
| |
| y. Fixed a problem that caused a `case' statement to be added to the history |
| incorrectly as a single command if the `case word' was on one line and the |
| `in' on another. |
| |
| z. Fixed a problem that caused internal shell quoting characters to be |
| incorrectly quoted with backslashes under some circumstances. |
| |
| aa. The shell now performs correct word splitting when IFS contains multibyte |
| characters. |
| |
| bb. The mail checking code now resets the cached file information if the size |
| drops to 0, even if the times don't change. |
| |
| cc. A completed command name that is found in $PATH as well as the name of a |
| directory in the current directory no longer has a slash appended in certain |
| circumstances: a single instance found in $PATH when `.' is not in $PATH, |
| and multiple instances found in $PATH, even when `.' is in $PATH. |
| |
| dd. Incorporated tilde expansion into the word expansion code rather than as a |
| separately-called function, fixing some cases where it was performed |
| inappropriately (e.g., after the second `=' in an assignment statement or |
| in a double-quoted parameter expansion). |
| |
| ee. Fixed several bugs encountered when parsing compound assignment statements, |
| so that compound assignments appearing as arguments to builtins are no |
| longer double-expanded. |
| |
| ff. Fixed a bug in the command execution code that caused asynchronous commands |
| containing command substitutions to not put the terminal in the wrong |
| process group. |
| |
| gg. Bash now handles the case where the WCONTINUED flag causes waitpid() to |
| return -1/EINVAL at runtime as well as configuration time. |
| |
| hh. Fixed parser to generate an error when the pipeline `argument' to `!' or |
| `time' is NULL. |
| |
| ii. The shell now takes a little more care when manipulating file descriptors |
| greater than 9 with the `exec' builtin. |
| |
| jj. Fixed a bug that caused variable assignments preceding the `command' builtin |
| preceding a special builtin to be preserved after the command completed in |
| POSIX mode. |
| |
| kk. Fixed a bug that allowed variables beginning with a digit to be created. |
| |
| ll. Fixed a bug that caused a \<newline> to be removed when parsing a $'...' |
| construct. |
| |
| mm. A shell whose name begins with `-' will now be a restricted shell if the |
| remainder of the name indicates it should be restricted. |
| |
| nn. Fixed a bug that could cause a core dump if FUNCNAME were changed or unset |
| during a function's execution. |
| |
| oo. Fixed a bug that caused executing a `return' in a function to not execute |
| a RETURN trap. The RETURN trap is inherited by shell functions only if |
| function tracing is globally enabled or has been enabled for that function. |
| |
| pp. Fixed cases where var[@] was not handled exactly like var, when var is a |
| scalar variable. |
| |
| qq. Fixed a bug that caused the first character after a SIGINT to be discarded |
| under certain circumstances. |
| |
| rr. Fixed exit status code so that a suspended job returns 128+signal as its |
| exit status (preventing commands after it in `&&' lists from being |
| executed). |
| |
| ss. Fixed a bug that caused the shell parser state to be changed by executing |
| a shell function as a result of word completion. |
| |
| tt. Fixed a long-standing bug that caused '\177' characters in variable |
| values to be discarded when expanded in double-quoted strings. |
| |
| uu. Fixed a bug that caused $RANDOM to be re-seeded multiple times in a |
| subshell environment. |
| |
| vv. Extensive changes to the job management code to avoid the pid-reuse and |
| pid-aliasing problems caused by retaining the exit status of too many jobs, |
| but still retain as many background job statuses as POSIX requires. |
| |
| ww. Fixed a parser bug in processing \<newline> that caused things like |
| |
| ((echo 5) \ |
| (echo 6)) |
| |
| to not work correctly. |
| |
| xx. `pwd -P' now sets $PWD to a directory name containing no symbolic links |
| when in posix mode, as POSIX requires. |
| |
| yy. In posix mode, bash no longer sets $PWD to a name containing no symbolic |
| links if a directory is chosen from $CDPATH. |
| |
| zz. The word splitting code now treats an IFS character that is not space, |
| tab, or newline and any adjacent IFS white space as a single delimiter, as |
| SUSv3/XPG6 require. |
| |
| aaa. The `read' builtin now checks whether or not the number of fields read is |
| exactly the same as the number of variables instead of just assigning the |
| rest of the line (minus any trailing IFS white space) to the last |
| variable. This is what POSIX/SUS/XPG all require. |
| |
| bbb. Fixed a bug that caused `read' to always check whether or not fd 0 was a |
| pipe, even when reading from another file descriptor. |
| |
| ccc. Fixed a bug that caused short-circuiting of execution even if the return |
| value was being inverted. |
| |
| ddd. Fixed a bug that caused a core dump while decoding \W escapes in PS1 if |
| PWD was unset. |
| |
| eee. Fixed a bug in `read' that counted internal quoting characters for the |
| purposes of `read -n'. |
| |
| fff. Fixed a bug so that a function definition in a pipeline causes a child |
| process to be forked at the right time. |
| |
| ggg. Bash will not attempt to link against a readline library that doesn't |
| have rl_gnu_readline_p == 1. |
| |
| hhh. Fixed a bug that caused `read' to consume one too many characters when |
| reading a fixed number of characters and the Nth character is a backslash. |
| |
| iii. Fixed a bug that caused `unset' on variables in the temporary environment |
| to leave them set when `unset' completed. |
| |
| jjj. Fixed a bug that caused bash to close fd 2 if an `exec' failed and the |
| shell didn't exit. |
| |
| kkk. The completion code is more careful to not turn `/' or `///' into `//', |
| for those systems on which `//' has special meaning. |
| |
| lll. Fixed a bug that caused command substitution in asynchronous commands to |
| close the wrong file descriptors. |
| |
| mmm. The shell no longer prints status messages about terminated background |
| processes unless job control is active. |
| |
| nnn. Fixed a bug that prevented multiple consecutive invocations of `history -s' |
| from adding all the commands to the history list. |
| |
| ooo. Added a couple of changes to make arithmetic expansion more consistent in |
| all its contexts (still not perfect). |
| |
| ppp. Fixed a bug that caused the parser to occasionally not find the right |
| terminating "`" in an old-style command substitution. |
| |
| qqq. Fixed a bug that caused core dumps when the shell was reading its non- |
| interactive input from fd 0 and fd 0 was duplicated and restored using a |
| combination of `exec' (to save) and redirection (to restore). |
| |
| rrr. Fixed a problem that caused loops in sourced scripts to not be cleaned |
| up properly when a `return' is executed. |
| |
| sss. Change internal command substitution completion function to append a slash |
| to directory names in the command. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that caused multiliine prompts to be wrapped and displayed |
| incorrectly. |
| |
| b. Fixed a bug that caused ^P/^N in emacs mode to fail to display the current |
| line correctly. |
| |
| c. Fixed a problem in computing the number of invisible characters on the first |
| line of a prompt whose length exceeds the screen width. |
| |
| d. Fixed vi-mode searching so that failure preserves the current line rather |
| than the last line in the history list. |
| |
| e. Fixed the vi-mode `~' command (change-case) to have the correct behavior at |
| end-of-line when manipulating multibyte characters. |
| |
| f. Fixed the vi-mode `r' command (change-char) to have the correct behavior at |
| end-of-line when manipulating multibyte characters. |
| |
| g. Fixed multiple bugs in the redisplay of multibyte characters: displaying |
| prompts longer than the screen width containing multibyte characters, |
| |
| h. Fix the calculation of the number of physical characters in the prompt |
| string when it contains multibyte characters. |
| |
| i. A non-zero value for the `rl_complete_suppress_append' variable now causes |
| no `/' to be appended to a directory name. |
| |
| j. Fixed forward-word and backward-word to work when words contained |
| multibyte characters. |
| |
| k. Fixed a bug in finding the delimiter of a `?' substring when performing |
| history expansion in a locale that supports multibyte characters. |
| |
| l. Fixed a memory leak caused by not freeing the timestamp in a history entry. |
| |
| m. Fixed a bug that caused "\M-x" style key bindings to not obey the setting |
| of the `convert-meta' variable. |
| |
| n. Fixed saving and restoring primary prompt when prompting for incremental |
| and non-incremental searches; search prompts now display multibyte |
| characters correctly. |
| |
| o. Fixed a bug that caused keys originally bound to self-insert but shadowed |
| by a multi-character key sequence to not be inserted. |
| |
| p. Fixed code so rl_prep_term_function and rl_deprep_term_function aren't |
| dereferenced if NULL (matching the documentation). |
| |
| q. Extensive changes to readline to add enough state so that commands |
| requiring additional characters (searches, multi-key sequences, numeric |
| arguments, commands requiring an additional specifier character like |
| vi-mode change-char, etc.) work without synchronously waiting for |
| additional input. |
| |
| r. Lots of changes so readline builds and runs on MinGW. |
| |
| s. Readline no longer tries to modify the terminal settings when running in |
| callback mode. |
| |
| t. The Readline display code no longer sets the location of the last invisible |
| character in the prompt if the \[\] sequence is empty. |
| |
| 3. New Features in Bash |
| |
| a. Bash now understands LC_TIME as a special variable so that time display |
| tracks the current locale. |
| |
| b. BASH_ARGC, BASH_ARGV, BASH_SOURCE, and BASH_LINENO are no longer created |
| as `invisible' variables and may not be unset. |
| |
| c. In POSIX mode, if `xpg_echo' option is enabled, the `echo' builtin doesn't |
| try to interpret any options at all, as POSIX requires. |
| |
| d. The `bg' builtin now accepts multiple arguments, as POSIX seems to specify. |
| |
| e. Fixed vi-mode word completion and glob expansion to perform tilde |
| expansion. |
| |
| f. The `**' mathematic exponentiation operator is now right-associative. |
| |
| g. The `ulimit' builtin has new options: -i (max number of pending signals), |
| -q (max size of POSIX message queues), and -x (max number of file locks). |
| |
| h. A bare `%' once again expands to the current job when used as a job |
| specifier. |
| |
| i. The `+=' assignment operator (append to the value of a string or array) is |
| now supported for assignment statements and arguments to builtin commands |
| that accept assignment statements. |
| |
| j. BASH_COMMAND now preserves its value when a DEBUG trap is executed. |
| |
| k. The `gnu_errfmt' option is enabled automatically if the shell is running |
| in an emacs terminal window. |
| |
| l. New configuration option: --single-help-strings. Causes long help text |
| to be written as a single string; intended to ease translation. |
| |
| m. The COMP_WORDBREAKS variable now causes the list of word break characters |
| to be emptied when the variable is unset. |
| |
| n. An unquoted expansion of $* when $IFS is empty now causes the positional |
| parameters to be concatenated if the expansion doesn't undergo word |
| splitting. |
| |
| o. Bash now inherits $_ from the environment if it appears there at startup. |
| |
| p. New shell option: nocasematch. If non-zero, shell pattern matching ignores |
| case when used by `case' and `[[' commands. |
| |
| q. The `printf' builtin takes a new option: -v var. That causes the output |
| to be placed into var instead of on stdout. |
| |
| r. By default, the shell no longer reports processes dying from SIGPIPE. |
| |
| s. Bash now sets the extern variable `environ' to the export environment it |
| creates, so C library functions that call getenv() (and can't use the |
| shell-provided replacement) get current values of environment variables. |
| |
| 4. New Features in Readline |
| |
| a. The key sequence sent by the keypad `delete' key is now automatically |
| bound to delete-char. |
| |
| b. A negative argument to menu-complete now cycles backward through the |
| completion list. |
| |
| c. A new bindable readline variable: bind-tty-special-chars. If non-zero, |
| readline will bind the terminal special characters to their readline |
| equivalents when it's called (on by default). |
| |
| d. New bindable command: vi-rubout. Saves deleted text for possible |
| reinsertion, as with any vi-mode `text modification' command; `X' is bound |
| to this in vi command mode. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.0-release, |
| and the previous version, bash-3.0-rc1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a boundary overrun that could cause segmentation faults when the |
| completion code hands an incomplete construct to the word expansion |
| functions. |
| |
| b. Changed posix mode behavior so that an error in a variable assignment |
| preceding a special builtin causes a non-interactive shell to exit. |
| |
| c. Change the directory expansion portion of the completion code to not |
| expand embedded command substitutions if the directory name appears in |
| the file system. |
| |
| d. Fixed a problem that caused `bash -r' to turn on restrictions before |
| reading the startup files. |
| |
| e. Fixed a problem with the default operation of the `umask' builtin. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a problem with readline saving the contents of the current line |
| before beginning a non-interactive search. |
| |
| b. Fixed a problem with EOF detection when using rl_event_hook. |
| |
| c. Fixed a problem with the vi mode `p' and `P' commands ignoring numeric |
| arguments. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.0-rc1, |
| and the previous version, bash-3.0-beta1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that caused incorrect behavior when referecing element 0 of |
| an array using $array, element 0 was unset, and `set -u' was enabled. |
| |
| b. System-specific changes for: SCO Unix 3.2, Tandem. |
| |
| c. Fixed a bug that caused inappropriate word splitting when a variable was |
| expanded within a double-quoted string that also included $@. |
| |
| d. Fixed a bug that caused `pwd' to not display anything in physical mode |
| when the file system had changed underneath the shell. |
| |
| e. Fixed a bug in the pre- and post- increment and decrement parsing in the |
| expression evaluator that caused errors when the operands and corresponding |
| operators were separated by whitespace. |
| |
| f. Fixed a bug that caused `history -p' to add an entry to the history list, |
| counter to the documentation. (Keeps the history expansions invoked by |
| emacs-mode command line editing from doing that as well.) |
| |
| g. Fixed a bug that could cause a core dump if `cd' is asked to print out a |
| pathname longer than PATH_MAX characters. |
| |
| h. Fixed a bug that caused jobs to be put into the wrong process group under |
| some circumstances after enabling job control with `set -m'. |
| |
| i. `unalias' now returns failure if no alias name arguments are supplied. |
| |
| j. Documented the characters not allowed to appear in an alias name. |
| |
| k. $* is no longer expanded as if in double quotes when it appears in the |
| body of a here document, as the SUS seems to require. |
| |
| l. The `bashbug' script now uses a directory in $TMPDIR for exclusive |
| access rather than trying to guess how the underlying OS provides for |
| secure temporary file creation. |
| |
| m. Fixed a few problems with `cd' and `pwd' when asked to operate on pathnames |
| longer than PATH_MAX characters. |
| |
| n. Fixed a memory leak caused when creating multiple local array variables |
| with identical names. |
| |
| o. Fixed a problem with calls to getcwd() so that bash now operates better |
| when the full pathname to the current directory is longer than PATH_MAX |
| bytes. |
| |
| p. The `trap' builtin now reports an error if a single non-signal argument |
| is specified. |
| |
| q. Fixed a bug that caused `umask' to not work correctly when presented |
| with a mask of all 0s. |
| |
| r. When `getopts' reaches the end of options, OPTARG is unset, as POSIX |
| appears to specify. |
| |
| s. Interactive mode now depends on whether or not stdin and stderr are |
| connected to a tty; formerly it was stdin and stdout. POSIX requires |
| this. |
| |
| t. Fixed vi-mode completion to work more as POSIX specifies (e.g., doing the |
| right kind of filename generation). |
| |
| 2. Changes to Readline |
| |
| a. Fixed a problem that could cause readline to refer to freed memory when |
| moving between history lines while doing searches. |
| |
| b. Improvements to the code that expands and displays prompt strings |
| containing multibyte characters. |
| |
| c. Fixed a problem with vi-mode not correctly remembering the numeric argument |
| to the last `c'hange command for later use with `.'. |
| |
| d. Fixed a bug in vi-mode that caused multi-digit count arguments to work |
| incorrectly. |
| |
| e. Fixed a problem in vi-mode that caused the last text modification command |
| to not be remembered across different command lines. |
| |
| f. Fixed problems with changing characters and changing case at the end of |
| the line. |
| |
| 3. New Features in Bash |
| |
| a. The `jobs', `kill', and `wait' builtins now accept job control notation |
| even if job control is not enabled. |
| |
| b. The historical behavior of `trap' that allows a missing `action' argument |
| to cause each specified signal's handling to be reset to its default is |
| now only supported when `trap' is given a single non-option argument. |
| |
| 4. New Features in Readline |
| |
| a. When listing completions, directories have a `/' appended if the |
| `mark-directories' option has been enabled. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.0-beta1, |
| and the previous version, bash-3.0-alpha. |
| |
| 1. Changes to Bash |
| |
| a. Fixes to build correctly when arrays are not compiled into the shell. |
| |
| b. Fixed command substitution to run any exit trap defined in the command |
| substitution before returning; the exit trap is not inherited from the |
| calling shell. |
| |
| c. Fixes to process group synchronization code so that every child process |
| attempts to set the terminal's process group; fixes some synchronization |
| problems on Linux kernels that schedule the child to always run before |
| the parent. |
| |
| d. Fixed processing of octal and hex constants in printf builtin for POSIX.2 |
| compliance. |
| |
| e. Fixed a couple of core dumps in the pattern removal code. |
| |
| f. Fixes to the array subrange extraction code to deal better with sparse |
| arrays. |
| |
| g. Parser errors and other errors that result in the shell exiting now cause |
| the exit trap to be run. |
| |
| h. Change the command substitution completion functions to not append any |
| closing quote, because it would be inserted a closing "`" or ")". |
| |
| i. Fix history initialization so assignments to $histchars made in startup |
| files are honored. |
| |
| j. If an exit trap does not contain a call to `exit', the shell now uses |
| the exit status of the last command executed before the trap as the exit |
| status of the shell. |
| |
| k. The parser now prompts with $PS2 if it reads a newline while parsing a |
| compound array assignment statement. |
| |
| l. When performing a compound array assignment, the parser doesn't treat |
| words of the form [index]=value as assignments if they're the result of |
| expansions. |
| |
| m. Fixed a bug that caused `return' executed in a trap command to make the |
| shell think it was still running the trap. |
| |
| n. Fixed the value of errno set by the pathname canonicalization functions. |
| |
| o. Changed the grammar so that `time' alone on a line times a null command |
| rather than being a syntax error. |
| |
| p. The pattern substitution code no longer performs quote removal on the |
| pattern before trying to match it, as the pattern removal functions do. |
| |
| q. Fixed a bug that could cause core dumps when checking whether a quoted |
| command name was being completed. |
| |
| r. Fixes to the pattern removal and pattern replacement expansions to deal |
| with multibyte characters better (and faster). |
| |
| s. Fix to the substring expansion (${param:off[:len]}) to deal with (possibly |
| multibyte) characters instead of raw bytes. |
| |
| t. Fixed a bug that caused some key bindings set in an inputrc to be ignored |
| at shell startup. |
| |
| u. Fixed a bug that caused unsetting a local variable within a function to |
| not work correctly. |
| |
| v. Fixed a bug that caused invalid variables to be created when using |
| `read -a'. |
| |
| w. Fixed a bug that caused "$@" to expand incorrectly when used as the right |
| hand side of a parameter expansion such as ${word:="$@"} if the first |
| character of $IFS was not a space. |
| |
| x. Fixed a slight cosmetic problem when printing commands containing a |
| `>&word' redirection. |
| |
| y. Fixed a problem that could cause here documents to not be created correctly |
| if the system temporary directory did not allow writing. |
| |
| 2. Changes to Readline |
| |
| a. Change to history expansion functions to treat `^' as equivalent to word |
| one, as the documention states. |
| |
| b. Some changes to the display code to improve display and redisplay of |
| multibyte characters. |
| |
| c. Changes to speed up the multibyte character redisplay code. |
| |
| d. Fixed a bug in the vi-mode `E' command that caused it to skip over the |
| last character of a word if invoked while point was on the word's |
| next-to-last character. |
| |
| e. Fixed a bug that could cause incorrect filename quoting when |
| case-insensitive completion was enabled and the word being completed |
| contained backslashes quoting word break characters. |
| |
| f. Fixed a bug in redisplay triggered when the prompt string contains |
| invisible characters. |
| |
| g. Fixed some display (and other) bugs encountered in multibyte locales |
| when a non-ascii character was the last character on a line. |
| |
| h. Fixed some display bugs caused by multibyte characters in prompt strings. |
| |
| i. Fixed a problem with history expansion caused by non-whitespace characters |
| used as history word delimiters. |
| |
| 3. New Features in Bash |
| |
| a. printf builtin understands two new escape sequences: \" and \?. |
| |
| b. `echo -e' understands two new escape sequences: \" and \?. |
| |
| c. The GNU `gettext' package and libintl have been integrated; the shell's |
| messages can be translated into different languages. |
| |
| d. The `\W' prompt expansion now abbreviates $HOME as `~', like `\w'. |
| |
| e. The error message printed when bash cannot open a shell script supplied |
| as argument 1 now includes the name of the shell, to better identify |
| the error as coming from bash. |
| |
| 4. New Features in Readline |
| |
| a. New application variable, rl_completion_quote_character, set to any |
| quote character readline finds before it calls the application completion |
| function. |
| |
| b. New application variable, rl_completion_suppress_quote, settable by an |
| application completion function. If set to non-zero, readline does not |
| attempt to append a closing quote to a completed word. |
| |
| c. New application variable, rl_completion_found_quote, set to a non-zero |
| value if readline determines that the word to be completed is quoted. |
| Set before readline calls any application completion function. |
| |
| d. New function hook, rl_completion_word_break_hook, called when readline |
| needs to break a line into words when completion is attempted. Allows |
| the word break characters to vary based on position in the line. |
| |
| e. New bindable command: unix-filename-rubout. Does the same thing as |
| unix-word-rubout, but adds `/' to the set of word delimiters. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-3.0-alpha, |
| and the previous version, bash-2.05b-release. |
| |
| 1. Changes to Bash |
| |
| a. Fixes so that the shell will compile without some of the default options |
| defined. |
| |
| b. Fixed an error message that did not pass enough arguments to printf. |
| |
| c. Fixed a bug that caused input redirection to a builtin inside a script |
| being read from standard input to result in the rest of the already- |
| read and buffered script to be discarded. |
| |
| d. Fixed a bug that caused subshell initialization to close the file |
| descriptor from which the shell was reading a script under certain |
| circumstances. |
| |
| e. Fixed a bug that caused the shell to not advance a string pointer over |
| a null wide character when doing string operations. |
| |
| f. Fixed the internal logout code so that shells that time out waiting for |
| input (using $TMOUT) run ~/.bash_logout. |
| |
| g. Portability and configuration changes for: cygwin, HP/UX, GNU/FreeBSD. |
| |
| h. The parser no longer adds implicit double quotes to ((...)) arithmetic |
| commands. |
| |
| i. The ((...)) arithmetic command evaluation code was fixed to not dump core |
| when the expanded string is null. |
| |
| j. The ((...)) arithmetic command evaluation code was fixed to not perform |
| variable assignments while expanding the expression. |
| |
| k. Fixed a bug that caused word splitting to be performed incorrectly when |
| IFS is set, but null. |
| |
| l. Fixed a bug in brace expansion that caused a quoted `$' preceding an |
| open brace to inhibit brace expansion. |
| |
| m. Fixed a bug that caused a leading `-' in the shell's name to cause it to |
| not be recognized as a restricted shell. |
| |
| n. Fixed a bug in the arithmetic evaluation code that could cause longjmps |
| to an invalid location and result in a core dump. |
| |
| o. Fixed a bug in the calculation of how many history lines are new in a |
| single shell session when reading new history lines from a file with |
| `history -n'. |
| |
| p. Fixed a bug in pathname canonicalization that caused the shell to dump |
| core when presented with a pathname longer than PATH_MAX. |
| |
| q. Fixed the parser so that it doesn't try to compare a char variable to |
| EOF, which fails when chars are unsigned. |
| |
| r. Fixed a bug in the simple command execution code that caused occasional |
| core dumps. |
| |
| s. The shell does a better job of saving any partial parsing state during |
| operations which cause a command to be executed while a line is being |
| entered and parsed. |
| |
| t. The completion code now splits words more like the expansion code when |
| $IFS is used to split. |
| |
| u. The locale code does a better job of recomputing the various locale |
| variable values when LC_ALL is unset. |
| |
| v. The programmable completion code does a better job of dequoting expanded |
| word lists before comparing them against the word to be matched. |
| |
| w. The shell no longer seg faults if the expanded value of $PS4 is null |
| and `set -x' is enabled. |
| |
| x. Fixed a bug that caused core dumps when a here string expanded to NULL. |
| |
| y. The mail checking code now makes sure the mailbox is bigger before |
| reporting the existence of new mail. |
| |
| z. The parser does not try to expand $'...' and $"..." when the appear |
| within double quotes unless the `extquote' option has been enabled with |
| `shopt'. For backwards compatibility, it is enabled by default. |
| |
| aa. Fixed a bug that caused `for x; do ...' and `select x; do ... to use |
| $@ instead of "$@" for the implicit list of arguments. |
| |
| bb. Fixed a bug that caused a subshell of a restricted shell (e.g., one |
| spawned to execute a pipeline) to not exit immediately if attempting |
| to use a command containing a slash. |
| |
| cc. Fixed a problem with empty replacements for a pattern that doesn't match |
| when performing ${param/word/} expansion. |
| |
| dd. Word expansions performed while expanding redirections no longer search |
| a command's temporary environment to expand variable values. |
| |
| ee. Improvements to the alias expansion code when expanding subsequent words |
| because an aliase's value ends with a space. |
| |
| ff. `cd -' now prints the current working directory after a successful chdir |
| even when the shell is not interactive, as the standard requires. |
| |
| gg. The shell does a better job of ensuring a child process dies of SIGINT |
| before resending SIGINT to itself. |
| |
| hh. The arithmetic expansion variable assignment code now does the right |
| thing when assigning to `special' variables like OPTIND. |
| |
| ii. When history expansion verification is enabled, the bash readline helper |
| functions that do history expansion on the current line don't print |
| the results. |
| |
| jj. Fixed bugs with multiple consecutive alias expansion when one of the |
| expansions ends with a space. |
| |
| kk. Fixed a problem in the programmable completion code that could cause core |
| dumps when trying to initialize a set of possible completions from a |
| list of variables. |
| |
| ll. The \[ and \] escape characters are now ignored when decoding the prompt |
| string if the shell is started with editing disabled. |
| |
| mm. Fixed a bug that could leave extra characters in a string when doing |
| quoted null character removal. |
| |
| nn. Command substitution and other subshell operations no longer reset the |
| line number (aids the bash debugger). |
| |
| oo. Better line number management when executing simple commands, conditional |
| commands, for commands, and select commands. |
| |
| pp. The globbing code now uses malloc, with its better failure properties, |
| rather than alloca(). |
| |
| qq. Fixed a bug that caused expansions like #{a[2]:=value} to create the |
| appropriate array element instead of a variable named `a[2]'. |
| |
| rr. Fixed a bug in the handling of a `?(...)' pattern immediately following |
| a `*' when extglob is enabled. |
| |
| ss. Fixed a bug that caused a `return' invoked in an exit trap when exit is |
| invoked in a function to misbehave. |
| |
| tt. Fixed a bug that caused CTLESC and CTLNUL characters to not be escaped |
| by the internal shell string quoting functions. |
| |
| uu. Fixed a bug that caused quoted null characters in an expanded word list |
| to be inappropriately assigned to an array variable when using `read -a'. |
| |
| vv. Fixed a bug that caused redirections accompanying a null command to persist |
| in the current shell. |
| |
| ww. Fixed a bug that caused the prompt to be printed when the shell was |
| expanding a multiline alias. |
| |
| xx. Fixed a bug that resulted in core dumps when the completion for a command |
| changed the compspec. |
| |
| yy. Fixed a bug that caused evaluation of programmable completions to print |
| notifications of completed jobs. |
| |
| zz. Bash now disables line editing when $EMACS == `t' and $TERM == `dumb' |
| (which is what emacs shell windows do). |
| |
| aaa. In posix mode, `kill -l' causes signal names to be displayed without |
| a leading `SIG'. |
| |
| bbb. Clear error flag on standard output so it doesn't persist across multiple |
| builtin commands. |
| |
| ccc. In posix mode, `alias' displays alias values without the leading `alias', |
| so the output cannot be used as subsequent input. |
| |
| ddd. In posix mode, the `trap' builtin doesn't check whether or not its |
| first argument is a signal specification and revert the signal handling |
| to its original disposition if it is. |
| |
| eee. Fixed several bugs in the handling of "$*" and "${array[*]}" by the |
| pattern substitution and removal expansions. |
| |
| fff. Fixed several problems with the handling of ${array[@]}, ${array[*]}, |
| $@, and $* by the indirect variable expansion code. |
| |
| ggg. Fixed a bug that did not allow `time' to be aliased. |
| |
| hhh. Improved the mail checking code so it won't check (and possibly cause an |
| NFS file system mount) until MAILPATH or MAIL is given a value -- there |
| is no default if DEFAULT_MAIL_DIRECTORY is not defined at compile time. |
| (It is computed by configure, but can be #undef'd in config-bot.h.) |
| |
| iii. If the `chkwinsize' option is enabled, the shell checks for window size |
| changes if a child process exits due to a signal. |
| |
| jjj. Removed the attempts to avoid adding a slash at the end of a completed |
| executable name if there was a directory with the same name in the |
| current directory. |
| |
| kkk. Fixed PATH lookup code so it treats the permission bits separately for |
| owner, group, and other, rather than checking them all. |
| |
| lll. Fixed the locale code to reset the parser's idea of the character class |
| <blank>, which controls how it splits tokens, when the locale changes. |
| |
| mmm. The shell now binds its special readline functions and key bindings only |
| if the user's inputrc file has not already bound them. |
| |
| nnn. The shell now reports on processes that dump core due to signals when |
| invoked as `-c command'. |
| |
| 2. Changes to Readline |
| |
| a. Fixes to avoid core dumps because of null pointer references in the |
| multibyte character code. |
| |
| b. Fix to avoid infinite recursion caused by certain key combinations. |
| |
| c. Fixed a bug that caused the vi-mode `last command' to be set incorrectly. |
| |
| d. Readline no longer tries to read ahead more than one line of input, even |
| when more is available. |
| |
| e. Fixed the code that adjusts the point to not mishandle null wide |
| characters. |
| |
| f. Fixed a bug in the history expansion `g' modifier that caused it to skip |
| every other match. |
| |
| g. Fixed a bug that caused the prompt to overwrite previous output when the |
| output doesn't contain a newline and the locale supports multibyte |
| characters. This same change fixes the problem of readline redisplay |
| slowing down dramatically as the line gets longer in multibyte locales. |
| |
| h. History traversal with arrow keys in vi insertion mode causes the cursor |
| to be placed at the end of the new line, like in emacs mode. |
| |
| i. The locale initialization code does a better job of using the right |
| precedence and defaulting when checking the appropriate environment |
| variables. |
| |
| j. Fixed the history word tokenizer to handle <( and >( better when used as |
| part of bash. |
| |
| k. The overwrite mode code received several bug fixes to improve undo. |
| |
| l. Many speedups to the multibyte character redisplay code. |
| |
| m. The callback character reading interface should not hang waiting to read |
| keyboard input. |
| |
| n. Fixed a bug with redoing vi-mode `s' command. |
| |
| o. The code that initializes the terminal tracks changes made to the terminal |
| special characters with stty(1) (or equivalent), so that these changes |
| are reflected in the readline bindings. New application-callable function |
| to make it work: rl_tty_unset_default_bindings(). |
| |
| p. Fixed a bug that could cause garbage to be inserted in the buffer when |
| changing character case in vi mode when using a multibyte locale. |
| |
| q. Fixed a bug in the redisplay code that caused problems on systems |
| supporting multibyte characters when moving between history lines when the |
| new line has more glyphs but fewer bytes. |
| |
| r. Undo and redo now work better after exiting vi insertion mode. |
| |
| s. Make sure system calls are restarted after a SIGWINCH is received using |
| SA_RESTART. |
| |
| t. Improvements to the code that displays possible completions when using |
| multibyte characters. |
| |
| u. Fixed a problem when parsing nested if statements in inputrc files. |
| |
| v. The completer now takes multibyte characters into account when looking for |
| quoted substrings on which to perform completion. |
| |
| w. The history search functions now perform better bounds checking on the |
| history list. |
| |
| 3. New Features in Bash |
| |
| a. ANSI string expansion now implements the \x{hexdigits} escape. |
| |
| b. There is a new loadable `strftime' builtin. |
| |
| c. New variable, COMP_WORDBREAKS, which controls the readline completer's |
| idea of word break characters. |
| |
| d. The `type' builtin no longer reports on aliases unless alias expansion |
| will actually be performed. |
| |
| e. HISTCONTROL is now a colon-separated list of values, which permits |
| more extensibility and backwards compatibility. |
| |
| f. HISTCONTROL may now include the `erasedups' option, which causes all lines |
| matching a line being added to be removed from the history list. |
| |
| g. `configure' has a new `--enable-multibyte' argument that permits multibyte |
| character support to be disabled even on systems that support it. |
| |
| h. New variables to support the bash debugger: BASH_ARGC, BASH_ARGV, |
| BASH_SOURCE, BASH_LINENO, BASH_SUBSHELL, BASH_EXECUTION_STRING, |
| BASH_COMMAND |
| |
| i. FUNCNAME has been changed to support the debugger: it's now an array |
| variable. |
| |
| j. for, case, select, arithmetic commands now keep line number information |
| for the debugger. |
| |
| k. There is a new `RETURN' trap executed when a function or sourced script |
| returns (not inherited child processes; inherited by command substitution |
| if function tracing is enabled and the debugger is active). |
| |
| l. New invocation option: --debugger. Enables debugging and turns on new |
| `extdebug' shell option. |
| |
| m. New `functrace' and `errtrace' options to `set -o' cause DEBUG and ERR |
| traps, respectively, to be inherited by shell functions. Equivalent to |
| `set -T' and `set -E' respectively. The `functrace' option also controls |
| whether or not the DEBUG trap is inherited by sourced scripts. |
| |
| n. The DEBUG trap is run before binding the variable and running the action |
| list in a `for' command, binding the selection variable and running the |
| query in a `select' command, and before attempting a match in a `case' |
| command. |
| |
| o. New `--enable-debugger' option to `configure' to compile in the debugger |
| support code. |
| |
| p. `declare -F' now prints out extra line number and source file information |
| if the `extdebug' option is set. |
| |
| q. If `extdebug' is enabled, a non-zero return value from a DEBUG trap causes |
| the next command to be skipped, and a return value of 2 while in a |
| function or sourced script forces a `return'. |
| |
| r. New `caller' builtin to provide a call stack for the bash debugger. |
| |
| s. The DEBUG trap is run just before the first command in a function body is |
| executed, for the debugger. |
| |
| t. `for', `select', and `case' command heads are printed when `set -x' is |
| enabled. |
| |
| u. There is a new {x..y} brace expansion, which is shorthand for {x.x+1, |
| x+2,...,y}. x and y can be integers or single characters; the sequence |
| may ascend or descend; the increment is always 1. |
| |
| v. New ksh93-like ${!array[@]} expansion, expands to all the keys (indices) |
| of array. |
| |
| w. New `force_fignore' shopt option; if enabled, suffixes specified by |
| FIGNORE cause words to be ignored when performing word completion even |
| if they're the only possibilities. |
| |
| x. New `gnu_errfmt' shopt option; if enabled, error messages follow the `gnu |
| style' (filename:lineno:message) format. |
| |
| y. New `-o bashdefault' option to complete and compgen; if set, causes the |
| whole set of bash completions to be performed if the compspec doesn't |
| result in a match. |
| |
| z. New `-o plusdirs' option to complete and compgen; if set, causes directory |
| name completion to be performed and the results added to the rest of the |
| possible completions. |
| |
| aa. `kill' is available as a builtin even when the shell is built without |
| job control. |
| |
| bb. New HISTTIMEFORMAT variable; value is a format string to pass to |
| strftime(3). If set and not null, the `history' builtin prints out |
| timestamp information according to the specified format when displaying |
| history entries. If set, bash tells the history library to write out |
| timestamp information when the history file is written. |
| |
| cc. The [[ ... ]] command has a new binary `=~' operator that performs |
| extended regular expression (egrep-like) matching. |
| |
| dd. `configure' has a new `--enable-cond-regexp' option (enabled by default) |
| to enable the =~ operator and regexp matching in [[ ... ]]. |
| |
| ee. Subexpressions matched by the =~ operator are placed in the new |
| BASH_REMATCH array variable. |
| |
| ff. New `failglob' option that causes an expansion error when pathname |
| expansion fails to produce a match. |
| |
| gg. New `set -o pipefail' option that causes a pipeline to return a failure |
| status if any of the processes in the pipeline fail, not just the last |
| one. |
| |
| 4. New Features in Readline |
| |
| a. History expansion has a new `a' modifier equivalent to the `g' modifier |
| for compatibility with the BSD csh. |
| |
| b. History expansion has a new `G' modifier equivalent to the BSD csh `g' |
| modifier, which performs a substitution once per word. |
| |
| c. All non-incremental search operations may now undo the operation of |
| replacing the current line with the history line. |
| |
| d. The text inserted by an `a' command in vi mode can be reinserted with |
| `.'. |
| |
| e. New bindable variable, `show-all-if-unmodified'. If set, the readline |
| completer will list possible completions immediately if there is more |
| than one completion and partial completion cannot be performed. |
| |
| f. There is a new application-callable `free_history_entry()' function. |
| |
| g. History list entries now contain timestamp information; the history file |
| functions know how to read and write timestamp information associated |
| with each entry. |
| |
| h. Four new key binding functions have been added: |
| |
| rl_bind_key_if_unbound() |
| rl_bind_key_if_unbound_in_map() |
| rl_bind_keyseq_if_unbound() |
| rl_bind_keyseq_if_unbound_in_map() |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05b-release, |
| and the previous version, bash-2.05b-beta2. |
| |
| 1. Changes to Bash |
| |
| a. Fixed an off-by-one error in the function that translates job |
| specifications. |
| |
| b. Note that we're running under Emacs and disable line editing if |
| $EMACS == `t'. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05b-beta2, |
| and the previous version, bash-2.05b-beta1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed the /= and %= arithmetic operators to catch division by zero. |
| |
| b. Added putenv, setenv, unsetenv to getenv replacement for completeness. |
| |
| c. Fixed a bug that could cause the -O expand_aliases invocation option |
| to not take effect. |
| |
| d. Fixed a problem with process substitution that resulted in incorrect |
| behavior when the number of process substitutions in an individual |
| command approached 64. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a problem with backward-char-search when on a system with support |
| for multibyte characters when running in a locale without any multibyte |
| characters. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05b-beta1, |
| and the previous version, bash-2.05b-alpha1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a problem when parsing a POSIX.2 character class name while |
| evaluating a bracket expression containing multibyte characters. |
| |
| b. Changed the help text for `bind' to make it clear that any command |
| that may be placed in ~/.inputrc is a valid argument to `bind'. |
| |
| c. Added `help' builtin entries for `((', `[[', and arithmetic for. |
| |
| d. malloc updated again: |
| o slightly better overflow and underflow detection by putting the |
| chunk size at the beginning and end of the chunk and making |
| sure they match in free/realloc |
| o partial page allocated to make things page-aligned no longer |
| completely wasted |
| o block coalescing now enabled by default |
| o splitting and coalescing enabled for 32-byte chunks, the most |
| common size requested |
| o fixed a problem that resulted in spurious underflow messages and |
| aborts |
| o bin sizes are precomputed and stored in an array rather than |
| being computed at run time |
| o malloc will return memory blocks back to the system if the block |
| being freed is at the top of the heap and of sufficient size to |
| make it worthwhile |
| o malloc/free/realloc now inline memset instead of calling the |
| libc function; uses Duff's device for good performance |
| |
| e. Check for getservent(); make the service name completion code dependent |
| on its presence. |
| |
| f. Changed the readline callback that executes a command bound to a key |
| sequence to not save the executed command on the history list and to |
| save and restore the parsing state. |
| |
| g. Changes to lib/sh/snprintf.c: fixed some bugs in the `g' and `G' |
| floating point format display; implemented the "'" flag character |
| that turns on thousands' grouping; fixed behavior on systems where |
| MB_CUR_MAX does not evaluate to a constant. |
| |
| h. The `unset' builtin no longer returns a failure status when asked to |
| unset a previously-unset variable or function. |
| |
| i. Changes to the build system to make it easier to cross-compile bash |
| for different systems. |
| |
| j. Added `,' to the characters that are backslash-escaped during filename |
| completion, to avoid problems with complete-into-braces and RCS filenames |
| containing commas. |
| |
| k. Some changes to the multibyte character support code to avoid many calls |
| to strlen(). |
| |
| l. Bash now correctly honors setting LANG to some value when LC_ALL does not |
| already have a value. |
| |
| m. Fixed a bug that could cause SIGSEGV when processing nested traps with |
| trap handlers. |
| |
| n. The `source/.' builtin now restores the positional parameters when it |
| returns unless they were changed using the `set' builtin during the file's |
| execution. |
| |
| o. Fixed a bug that caused a syntax error when a command was terminated by |
| EOF. |
| |
| 2. New Features in Bash |
| |
| a. There is now support for placing the long help text into separate files |
| installed into ${datadir}/bash. Not enabled by default; can be turned |
| on with `--enable-separate-helpfiles' option to configure. |
| |
| b. All builtins that take operands accept a `--' pseudo-option, except |
| `echo'. |
| |
| c. The `echo' builtin now accepts \0xxx (zero to three octal digits following |
| the `0') in addition to \xxx (one to three octal digits) for SUSv3/XPG6/ |
| POSIX.1-2001 compliance. |
| |
| 3. Changes to Readline |
| |
| a. Fixed a small problem in _rl_insert_char with multibyte characters. |
| |
| b. Fixes from IBM for line wrapping problems when using multibyte characters. |
| |
| c. Fixed a problem which caused the display to be messed up when the last |
| line of a multi-line prompt (possibly containing invisible characters) |
| was longer than the screen width. |
| |
| d. Fixed a problem with the vi-mode `r' command that ocurred on systems with |
| support for multibyte characters when running in a locale without any |
| multibyte characters. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05b-alpha1, |
| and the previous version, bash-2.05a-release. |
| |
| 1. Changes to Bash |
| |
| a. Some changes to work around inlining differences between compilers. |
| |
| b. Added more prototypes for internal shell typedefs, to catch argument |
| passing errors when using pointers to functions. |
| |
| c. The `cd' builtin now fails in posix mode when a valid directory cannot be |
| constructed from a relative pathname argument and the $PWD using pathname |
| canonicalization, and the -P option has not been supplied. Previously, |
| the shell would attempt to use what the user typed, leading to weird |
| values for $PWD and discrepancies between the value of $PWD and the |
| actual working directory. |
| |
| d. The `cd' builtin now resets $PWD when canonicalization fails but a chdir |
| to the pathname passed as an argument succeeds (when not in posix mode). |
| |
| e. The `fc' builtin has been fixed, as POSIX requires, to use the closest |
| history position in range when given an out-of-range argument. |
| |
| f. The history file loading code was changed to allow lines to be saved in |
| the history list from the shell startup files. |
| |
| g. `history -s args' now works better in compound commands. |
| |
| h. The tilde expansion code was fixed to better recognize when it's being |
| invoked in an assignment context, which enables expansion after `=' |
| and `:'. |
| |
| i. Fixed the command name completion code so a slash is no longer appended |
| to a single match if there happens to be a directory with that name in |
| $PWD. |
| |
| j. Fixed compound array assignment to no longer perform alias expansion, to |
| allow reserved words as array members, and to not produce extra output |
| when the `-v' option had been enabled. |
| |
| k. Fixed the programmable completion code to better handle newlines in lists |
| of possible completions (e.g., `complete -W'). |
| |
| l. Removed the reserved words from the `bash-builtins' manual page. |
| |
| m. Parser error reporting now attempts to do a better job of identifying the |
| token in error rather than doing straight textual analysis. |
| |
| n. Fixes for Inf/NaN, locales, wide/multibyte characters and zero-length |
| arguments in the library snprintf(3) replacement. |
| |
| o. `read -e' no longer does command name completion on the first word on |
| the line being read. |
| |
| p. `select' now returns failure if the read of the user's selection fails. |
| |
| q. Fixed a bug that could cause a core dump when setting $PIPESTATUS. |
| |
| r. Fixes to not allocate so many job slots when the shell is running a loop |
| with job control enabled in a subshell of an interactive shell. |
| |
| s. Fixed a bug in the trap code that caused traps to be inherited by |
| command substitutions in some cases. |
| |
| t. Fixed a bug that could cause alias expansion to inappropriately expand |
| the word following the alias. |
| |
| u. Fixed a bug in the `kill' builtin that mishandled negative pid arguments. |
| |
| v. The parser is less lenient when parsing assignment statements where the |
| characters before the `=' don't comprise a valid identifier. |
| |
| w. The arithmetic expression evaluation code now honors the setting of the |
| `-u' option when expanding variable names. |
| |
| x. Fixed the arithmetic evaluation code to allow array subscripts to be |
| assigned (`let b[7]=42') and auto-incremented and auto-decremented |
| (e.g., b[7]++). |
| |
| y. Reimplemented the existing prompt string date and time expansions using |
| strftime(3), which changed the output of \@ in some locales. |
| |
| z. Fixed a bug that could cause a core dump when a special shell variable |
| (like RANDOM) was converted to an array with a variable assignment. |
| |
| aa. Fixed a bug that would reset the handler for a signal the user had |
| trapped to a function that would exit the shell when setting the exit |
| trap in a non-interactive shell. |
| |
| bb. Changed the execve(2) wrapper code to check whether or not a failing |
| command is a directory before looking at whether a `#!' interpreter |
| failed for some reason. |
| |
| cc. Fixed a bug in the command printing code so it no longer inserts a `;' |
| after a newline, which produces a syntax error when reused as input. |
| |
| dd. The code that expands $PS4 no longer inherits the `-x' flag. |
| |
| ee. The bash-specific completion functions may now take advantage of the |
| double-TAB and M-? features of the standard readline completion |
| functions. |
| |
| ff. The mail checking code no longer prints a message if the checked file's |
| size has not increased, even if the access time is less than the modification time. |
| |
| gg. Rewrote the variable symbol table code: there is now a stack of |
| contexts, each possibly including a separate symbol table; there can |
| be more than one temporary environment supplied to nested invocations |
| of `./source'; the temporary environments no longer require so much |
| special-case code; shell functions now handle the temporary environment |
| and local variables more consistently; function scope exit is faster now |
| that the entire symbol table does not have to be traversed to dispose of |
| local variables; it is now easier to push vars from the temporary |
| environment to the shell's variable table in posix mode; some duplicated |
| code has been removed. |
| |
| hh. Regularized the error message printing code; builtin_error is now called |
| more consistently, and common error message strings are handled by small |
| functions. This should make eventual message translation easier. |
| |
| ii. Error messages now include the line number in a script when the shell |
| is not interactive. |
| |
| jj. Array subscript expansion now takes place even when the array variable is |
| unset, so side effects will take place. |
| |
| kk. Fixed a bug in the SICGHLD child-reaping code so that it won't find |
| jobs already marked as terminated if the OS reuses pids quickly enough. |
| |
| ll. Fixed a bug that could cause a signal to not interrupt the `wait' |
| builtin while it was waiting for a background process to terminate. |
| |
| mm. A couple of changes to make it easier for multiple shells to share history |
| files using `history -n', `history -r', and `history -w'. |
| |
| nn. The `getopts' builtin always increments OPTIND to point to the next |
| option to be handled when an option is returned, whether it's valid |
| or not, as POSIX 1003.x-2001 requires. |
| |
| oo. Changed some parts of the expansion code to avoid allocating and |
| immediately freeing memory without using the results for anything. |
| |
| pp. The shell now keeps track of $IFS internally, updating its internal map |
| each time the variable is assigned a new value (or at local scope exit). |
| This saves thousands of hash lookups for IFS, which, while individually |
| cheap, add up. |
| |
| qq. Rewrote the hash table code: searching and insertion are much faster now, |
| and it uses a better string hashing function; augmented the function |
| interface to simplify other parts of the code and remove duplicated code |
| |
| rr. The shell now uses a simple, generic `object cache' for allocating and |
| caching words and word lists, which were the major users of |
| malloc/free. |
| |
| ss. Fixed the assignment statement parsing code to allow whitespace and |
| newlines in subscripts when performing array element assignment. |
| |
| tt. The shell now issues many fewer calls to sigprocmask and other signal |
| masking system calls. |
| |
| uu. Fixed the `test' and conditional command file comparison operators to |
| work right when one file has a non-positive timestamp and the other |
| does not exist. |
| |
| vv. Fixed some cases where the special characters '\001' and '\177' in the |
| values of variables or positional parameters caused incorrect expansion |
| results. |
| |
| 2. Changes to Readline |
| |
| a. Fixed output of comment-begin character when listing variable values. |
| |
| b. Added some default key bindings for common escape sequences produced by |
| HOME and END keys. |
| |
| c. Fixed the mark handling code to be more emacs-compatible. |
| |
| d. A bug was fixed in the code that prints possible completions to keep it |
| from printing empty strings in certain circumstances. |
| |
| e. Change the key sequence printing code to print ESC as M\- if ESC is a |
| meta-prefix character -- it's easier for users to understand than \e. |
| |
| f. Fixed unstifle_history() to return values that match the documentation. |
| |
| g. Fixed the event loop (rl_event_hook) to handle the case where the input |
| file descriptor is invalidated. |
| |
| h. Fixed the prompt display code to work better when the application has a |
| custom redisplay function. |
| |
| i. Changes to make reading and writing the history file a little faster, and |
| to cope with huge history files without calling abort(3) from xmalloc. |
| |
| j. The vi-mode `S' and `s' commands are now undone correctly. |
| |
| 3. New Features in Bash |
| |
| a. If set, TMOUT is the default timeout for the `read' builtin. |
| |
| b. `type' has two new options: `-f' suppresses shell function lookup, and |
| `-P' forces a $PATH search. |
| |
| c. New code to handle multibyte characters. |
| |
| d. `select' was changed to be more ksh-compatible, in that the menu is |
| reprinted each time through the loop only if REPLY is set to NULL. |
| The previous behavior is available as a compile-time option. |
| |
| e. `complete -d' and `complete -o dirnames' now force a slash to be |
| appended to names which are symlinks to directories. |
| |
| f. There is now a bindable edit-and-execute-command readline command, |
| like the vi-mode `v' command, bound to C-xC-e in emacs mode. |
| |
| g. Added support for ksh93-like [:word:] character class in pattern matching. |
| |
| h. The $'...' quoting construct now expands \cX to Control-X. |
| |
| i. A new \D{...} prompt expansion; passes the `...' to strftime and inserts |
| the result into the expanded prompt. |
| |
| j. The shell now performs arithmetic in the largest integer size the |
| machine supports (intmax_t), instead of long. |
| |
| k. If a numeric argument is supplied to one of the bash globbing completion |
| functions, a `*' is appended to the word before expansion is attempted. |
| |
| l. The bash globbing completion functions now allow completions to be listed |
| with double tabs or if `show-all-if-ambiguous' is set. |
| |
| m. New `-o nospace' option for `complete' and `compgen' builtins; suppresses |
| readline's appending a space to the completed word. |
| |
| n. New `here-string' redirection operator: <<< word. |
| |
| o. When displaying variables, function attributes and definitions are shown |
| separately, allowing them to be re-used as input (attempting to re-use |
| the old output would result in syntax errors). |
| |
| p. There is a new configuration option `--enable-mem-scramble', controls |
| bash malloc behavior of writing garbage characters into memory at |
| allocation and free time. |
| |
| q. The `complete' and `compgen' builtins now have a new `-s/-A service' |
| option to complete on names from /etc/services. |
| |
| r. `read' has a new `-u fd' option to read from a specified file descriptor. |
| |
| s. Fix the completion code so that expansion errors in a directory name |
| don't cause a longjmp back to the command loop. |
| |
| t. Fixed word completion inside command substitution to work a little more |
| intuitively. |
| |
| u. The `printf' %q format specifier now uses $'...' quoting to print the |
| argument if it contains non-printing characters. |
| |
| v. The `declare' and `typeset' builtins have a new `-t' option. When applied |
| to functions, it causes the DEBUG trap to be inherited by the named |
| function. Currently has no effect on variables. |
| |
| w. The DEBUG trap is now run *before* simple commands, ((...)) commands, |
| [[...]] conditional commands, and for ((...)) loops. |
| |
| x. The expansion of $LINENO inside a shell function is only relative to the |
| function start if the shell is interactive -- if the shell is running a |
| script, $LINENO expands to the line number in the script. This is as |
| POSIX-2001 requires. |
| |
| y. The bash debugger in examples/bashdb has been modified to work with the |
| new DEBUG trap semantics, the command set has been made more gdb-like, |
| and the changes to $LINENO make debugging functions work better. Code |
| from Gary Vaughan. |
| |
| z. New [n]<&word- and [n]>&word- redirections from ksh93 -- move fds (dup |
| and close). |
| |
| aa. There is a new `-l' invocation option, equivalent to `--login'. |
| |
| bb. The `hash' builtin has a new `-l' option to list contents in a reusable |
| format, and a `-d' option to remove a name from the hash table. |
| |
| 4. New Features in Readline |
| |
| a. Support for key `subsequences': allows, e.g., ESC and ESC-a to both |
| be bound to readline functions. Now the arrow keys may be used in vi |
| insert mode. |
| |
| b. When listing completions, and the number of lines displayed is more than |
| the screen length, readline uses an internal pager to display the results. |
| This is controlled by the `page-completions' variable (default on). |
| |
| c. New code to handle editing and displaying multibyte characters. |
| |
| d. The behavior introduced in bash-2.05a of deciding whether or not to |
| append a slash to a completed name that is a symlink to a directory has |
| been made optional, controlled by the `mark-symlinked-directories' |
| variable (default is the 2.05a behavior). |
| |
| e. The `insert-comment' command now acts as a toggle if given a numeric |
| argument: if the first characters on the line don't specify a |
| comment, insert one; if they do, delete the comment text |
| |
| f. New application-settable completion variable: |
| rl_completion_mark_symlink_dirs, allows an application's completion |
| function to temporarily override the user's preference for appending |
| slashes to names which are symlinks to directories. |
| |
| g. New function available to application completion functions: |
| rl_completion_mode, to tell how the completion function was invoked |
| and decide which argument to supply to rl_complete_internal (to list |
| completions, etc.). |
| |
| h. Readline now has an overwrite mode, toggled by the `overwrite-mode' |
| bindable command, which could be bound to `Insert'. |
| |
| i. New application-settable completion variable: |
| rl_completion_suppress_append, inhibits appending of |
| rl_completion_append_character to completed words. |
| |
| j. New key bindings when reading an incremental search string: ^W yanks |
| the currently-matched word out of the current line into the search |
| string; ^Y yanks the rest of the current line into the search string, |
| DEL or ^H deletes characters from the search string. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05a-release, |
| and the previous version, bash-2.05a-rc1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed the `printf' builtin so that the variable name supplied as an |
| argument to a %n conversion must be a valid shell identifier. |
| |
| b. Improved the random number generator slightly. |
| |
| c. Changes to configuration to not put -I/usr/include into $CFLAGS, since |
| it messes up some includes. |
| |
| d. Corrected description of POSIXLY_CORRECT in man page and info manual. |
| |
| e. Fixed a couple of cases of incorrect function prototypes that sneaked |
| through and caused compilation problems. |
| |
| f. A few changes to avoid potential core dumps in the programmable completion |
| code. |
| |
| g. Fixed a configure problem that could cause a non-existent file to show |
| up in LIBOBJS. |
| |
| h. Fixed a configure problem that could cause siglist.o to not be built when |
| required. |
| |
| i. Changes to the strtoimax and strtoumax replacement functions to work |
| around buggy compilers. |
| |
| j. Fixed a problem with the snprintf replacement function that could |
| potentially cause a core dump. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a locale-specific problem in the vi-mode `goto mark' command. |
| |
| b. Fixed Makefile to not put -I/usr/include into CFLAGS, since it can cause |
| include file problems. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05a-rc1, |
| and the previous version, bash-2.05a-beta1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed the snprintf replacement to correctly implement the `alternate form' |
| of the %g and %G conversions. |
| |
| b. Fixed snprintf to correctly handle the optional precision with the %g and |
| %G conversions. |
| |
| c. Fixed the arithmetic evaluation code to correct the values of `@' and `_' |
| when translating base-64 constants (they were backwards). |
| |
| d. New library functions for formatting long and long long ints. |
| |
| e. Fixed a few places where negative array subscripts could have occurred, |
| mostly as the result of systems using signed characters. |
| |
| f. Fixed a few places that assumed a pid_t was no wider than an int. |
| |
| g. Fixed the `maildir' mail checking code to work on systems where a |
| `struct stat' doesn't include an `st_blocks' member. |
| |
| h. Fixed snprintf to make `unsigned long long' conversion formats (%llu) |
| work better. |
| |
| i. Fixed snprintf to not print a sign when asked to do an unsigned conversion. |
| |
| j. Made configure changes to avoid compiling empty source files in lib/sh. |
| |
| k. New replacement functions (if necessary) for strtoull, strtoll, strtoimax, |
| strtoumax. |
| |
| l. The `printf' builtin now handles the `ll' and `j' length modifiers |
| directly, since they can affect the type and width of the argument |
| passed to printf(3). |
| |
| m. Renamed a number of the bash-specific autoconf macros in aclocal.m4 to |
| have more sytematic naming, with accompanying changes to configure.in. |
| |
| n. Fixed snprintf to handle long doubles and the %a/%A conversions by |
| falling back to sprintf, as long as sprintf supports them. |
| |
| o. Fixed return value from vsnprintf/snprintf to be the number of characters |
| that would have been printed, even if that number exceeds the buffer |
| size passed as an argument. |
| |
| p. Bash no longer attempts to define its own versions of some ctype macros |
| if they are implemented as functions in libc but not as macros in |
| <ctype.h>. |
| |
| q. Changed the variable printing code (used by `set', `export', etc.) to |
| not use the $'...' syntax when in posix mode, since that caused |
| interoperability problems with other shells (most notably with autoconf). |
| When not in posix mode, it uses $'...' if the string to be printed |
| contains non-printing characters and regular single quotes otherwise. |
| |
| r. snprintf now recognizes the %F conversion. |
| |
| s. Fixed a bug that could cause the wrong status to be returned by a shell |
| function when the shell is compiled without job control and a null |
| command containing a command substutition was executed in the function. |
| |
| t. When in posix mode, the default value for MAILCHECK is 600. |
| |
| u. Bash only initializes FUNCNAME, GROUPS, and DIRSTACK as special variables |
| if they're not in the initial environment. |
| |
| v. If SECONDS appears in the initial environment with a valid integer value, |
| bash uses that as the starting value, as if an assignment had been |
| performed. |
| |
| w. Bash no longer auto-exports HOME, PATH, SHELL, or TERM, even though it |
| gives them default values if they don't appear in the initial environment. |
| |
| x. Bash no longer auto-exports HOSTNAME, HOSTTYPE, MACHTYPE, or OSTYPE, |
| even if it assigns them default values. |
| |
| y. Bash no longer removes the export attribute from SSH_CLIENT or SSH2_CLIENT |
| if they appear in the initial environment. |
| |
| z. Bash no longer attempts to discover if it's being run by sshd in order to |
| run the startup files. If the SSH_SOURCE_BASHRC is uncommented in |
| config-top.h it will attempt to do so as previously, but that's commented |
| out in the distributed version. |
| |
| aa. Fixed a typo in the code that tests for LC_NUMERIC. |
| |
| bb. The POSIXLY_CORRECT shell variable and its effects are now documented. |
| |
| cc. Some changes to several of the support shell scripts included in the |
| definitions to try to avoid race conditions and attacks. |
| |
| dd. Several changes to avoid warnings from `gcc -Wall'. |
| |
| ee. Fixed a problem with the `unset' builtin that could cause incorrect |
| results if asked to unset a variable and an array subscript in the |
| same command. |
| |
| ff. A few changes to the shell's temporary file creation code to avoid |
| potential file descriptor leaks and to prefer the system's idea of |
| the temporary directory to use. |
| |
| gg. Fixes to build with the C alloca in lib/malloc/alloca.c if the system |
| requires it but the shell has been configured --without-bash-malloc. |
| |
| hh. Updated the documentation to note that only interactive shells resend |
| SIGHUP to all jobs before exiting. |
| |
| ii. Fixes to only pass unquoted tilde words to tilde_expand, rather than |
| rely on tilde_expand or getpwnam(3) to handle the quotes (MacOS 10.x |
| will remove backslashes in any login name passed to getpwnam(3)). |
| |
| jj. Small change from Paul Eggert to make LINENO right in commands run with |
| `bash -c'. |
| |
| 2. New Features in Bash |
| |
| a. The `printf' builtin now handles the %a and %A conversions if they're |
| implemented by printf(3). |
| |
| b. The `printf' builtin now handles the %F conversion (just about like %f). |
| |
| c. The `printf' builtin now handles the %n conversion like printf(3). The |
| corresponding argument is the name of a shell variable to which the |
| value is assigned. |
| |
| 3. Changes to Readline |
| |
| a. Fixed a few places where negative array subscripts could have occurred. |
| |
| b. Fixed the vi-mode code to use a better method to determine the bounds of |
| the array used to hold the marks. |
| |
| c. Fixed the defines in chardefs.h to work better when chars are signed. |
| |
| d. Fixed configure.in to use the new names for bash autoconf macros. |
| |
| e. Readline no longer attempts to define its own versions of some ctype |
| macros if they are implemented as functions in libc but not as macros in |
| <ctype.h>. |
| |
| f. Fixed a problem where rl_backward could possibly set point to before |
| the beginning of the line. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05a-beta1, |
| and the previous version, bash-2.05a-alpha1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug in the evalution of arithmetic `for' statements when the |
| expanded expression is NULL. |
| |
| b. Fixed an unassigned variable problem in the redirection printing code. |
| |
| c. Added more prototypes to extern function declarations in the header |
| files and to static function declarations in C source files. |
| |
| d. Make sure called functions have a prototype in scope, to get the arguments |
| and return values right instead of casting. Removed extern function |
| declarations from C source files that were already included in header |
| files. |
| |
| e. Changed some function arguments to use function typedefs in general.h so |
| the prototypes can be checked. The only use of Function and VFunction |
| now is for unwind-protects. |
| |
| f. More const changes to function arguments and appropriate variables. |
| |
| g. Changed the mail checking support to handle `maildir'-style mail |
| directories. |
| |
| h. Augmented the bash malloc to pass in the file and line number information |
| for each malloc, realloc, and free. This should result in better error |
| messages. |
| |
| i. The `old' gnu malloc is no longer a configuration option. |
| |
| j. Augmented the bash malloc with optional tracing and registering allocated |
| and freed memory. |
| |
| k. Prompt string decoding now saves and restores the value of $? when it |
| expands the prompt string, so command substitutions don't change $?. |
| |
| i. Array indices are now `long', since shell arithmetic is performed as long, |
| and the internal arrayind_t type is used consistently. |
| |
| j. Some more `unsigned char *' fixes from Paul Eggert. |
| |
| k. Fixed a bad call to builtin_error that could cause core dumps when making |
| local variables. |
| |
| l. `return' may no longer be used to terminate a `select' command, for |
| compatibility with ksh. |
| |
| m. Changed code that reads octal numbers to do a better job of detecting |
| overflows. |
| |
| n. The time formatting code no longer uses absolute indices into a buffer, |
| because the buffer size changes depending on the size of a `time_t'. |
| |
| o. `umask' now prints four digits when printing in octal mode, for |
| compatibility with other shells. |
| |
| p. Lots of changes to the `printf' builtin from Paul Eggert: it handles `L' |
| formats and long doubles better, and internal functions have been |
| simpified where appropriate. |
| |
| q. Some `time_t' fixes for machines were a time_t is bigger than a long. |
| |
| r. Replaced some bash-specific autoconf macros with standard equivalents. |
| |
| s. Improvmed the code that constructs temporary filenames to make the |
| generated names a bit more random. |
| |
| t. Added code that checks for ascii before calling any of the is* ctype |
| functions. |
| |
| u. Changed some places where a `char' was used as an array subscript to use |
| `unsigned char', since a `char' can be negative if it's signed by default. |
| |
| v. Lots of changes to the `ulimit' builtin from Paul Eggert to add support |
| for the new POSIX-200x RLIM_SAVED_CUR and RLIM_SAVED_MAX values and |
| simplify the code. |
| |
| w. `ulimit' now prints the description of a resource in any error message |
| relating to fetching or setting that resource's limits. |
| |
| x. The `snprintf' replacement now computes maximum values at compile |
| time rather than using huge constants for things like long long. |
| |
| y. Interactive shells now ignore `set -n'. |
| |
| z. Changed the malloc bookkeeping information so that it's now 8 bytes |
| instead of 12 on most 32-bit machines (saving 4 bytes per allocation), |
| restoring 8-byte alignment. |
| |
| aa. The malloc error reporting code now attempts to print the file and line |
| number of the call that caused the error. |
| |
| bb. Changed the redirection error reporting code to catch EBADF errors and |
| report the file descriptor number rather than the file being redirected |
| to or from (e.g., things like `exec 4242<x' where 4242 is an out-of-range |
| file descriptor). |
| |
| cc. `printf', `echo -e', and the $'...' code now process only two hex digits |
| after a `\x' escape sequence for compatibility with other shells, and |
| the documentation was changed to note that the octal and hex escape |
| sequences result in an eight-bit value rather than strict ASCII. |
| |
| 2. Changes to Readline |
| |
| a. The completion code now attempts to do a better job of preserving the |
| case of the word the user typed if ignoring case in completions. |
| |
| b. Readline defaults to not echoing the input and lets the terminal |
| initialization code enable echoing if there is a controlling terminal. |
| |
| c. The key binding code now processes only two hex digits after a `\x' |
| escape sequence, and the documentation was changed to note that the |
| octal and hex escape sequences result in an eight-bit value rather |
| than strict ASCII. |
| |
| 3. New Features in Bash |
| |
| a. The builtin `ulimit' now takes two new non-numeric arguments: `hard', |
| meaning the current hard limit, and `soft', meaning the current soft |
| limit, in addition to `unlimited' |
| |
| b. `ulimit' now prints the option letter associated with a particular |
| resource when printing more than one limit. |
| |
| c. `ulimit' prints `hard' or `soft' when a value is not `unlimited' but is |
| one of RLIM_SAVED_MAX or RLIM_SAVED_CUR, respectively. |
| |
| 4. New Features in Readline |
| |
| a. New bindable variable `history-preserve-point'. If set, the history |
| code attempts to place the user at the same location on each history |
| line retrived with previous-history or next-history. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05a-alpha1, |
| and the previous version, bash-2.05-release. |
| |
| 1. Changes to Bash |
| |
| a. Better checks in the redirection code for write errors. |
| |
| b. bashbug now uses $TMPDIR, defaulting to /tmp, and uses mktemp(1) more |
| portably. |
| |
| c. System-specific configuration changes for: Interix, OpenBSD, FreeBSD, |
| MacOS X. |
| |
| d. Some more `const' cleanups through the code. |
| |
| e. Fixed a typo in the /dev/fd redirection code, better checks for valid |
| numeric fds in /dev/fd. |
| |
| f. Fixed many parts of the shell to handle integer overflow more gracefully |
| and to do more stringent checks for valid numbers. |
| |
| g. Fixed mksignames to include config.h. |
| |
| h. Fixed an uninitialized variable problem that could cause the shell to core |
| dump when replacing characters in a string. |
| |
| i. New mechanism for updating the patch level when official patches are |
| released (patchlevel.h). |
| |
| j. configure.in changed to no longer require external files _distribution and |
| _patchlevel. |
| |
| k. Fixed non-interactive shell initialization problem when bash started as |
| `bash -i filename'. |
| |
| l. Fixed printf builtin conversion error handling to be POSIX.2-conformant. |
| |
| m. autoconf-2.52 is now used to build configure; autoconf-2.50 or newer is |
| required. Some of the bash-specific macros were removed, since they are |
| now standard. |
| |
| n. Startup files and files read with source or `.' are no longer required to |
| be regular files. |
| |
| o. Fixed core dump in builtin printf when user-supplied precision or field |
| width is 0. |
| |
| p. Fixed builtin printf to treat a negative field width as a positive field |
| width with left-justification. |
| |
| r. New unwind-protect implementation from Paul Eggert. |
| |
| s. Fixed an inadvertently-unclosed comment in the bash completion code that |
| caused programmable completions to not add trailing slashes or spaces to |
| completions. |
| |
| t. Fixed the process substitution code to cope better when stdin is closed. |
| |
| v. Fixes, mostly from Paul Eggert, for a few possible buffer overflows in |
| the shell. |
| |
| w. Fixes from Paul Eggert to avoid most of the type casts in the shell code, |
| and use more appropriate types for a number of variables. |
| |
| x. Command substition no longer inherits the DEBUG trap. |
| |
| y. Some fixes to the process substition code on machines without /dev/fd so |
| that named pipes are not removed inappropriately. |
| |
| z. The loadable `getconf' builtin is now much more complete, and will become |
| part of the shell in the future. |
| |
| aa. The select command no longer terminates on a `return', so it can be used |
| to return from an enclosing function (as ksh does it). |
| |
| bb. Fixed the extended pattern matching code to behave better when presented |
| with incorrectly-formed patterns. |
| |
| cc. Some changes were made with the intent of making cross-compilation easier. |
| |
| dd. The network code (/dev/tcp and /dev/udp redirections) uses getaddrinfo(3) |
| if it's available, which adds support for IPv6. |
| |
| ee. Subshells of login shells no longer source ~/.bash_logout when they exit. |
| |
| ff. Fixes so that subshells don't exit inappropriately if the -e option has |
| been set. |
| |
| gg. Restricted shells no longer allow functions to be exported. |
| |
| hh. Changes to the pattern matching code so extended pattern matching works |
| on systems with deficient shared library implementations, like MacOS X. |
| |
| ii. Better error messages when a script with a leading `#!interp' fails |
| to execute because of problems with `interp'. |
| |
| jj. Fixed `compgen' to handle the `-o default' option better. |
| |
| kk. Fixed the job control code to force an asynchronous process's standard |
| input to /dev/null only if job control is not active. |
| |
| ll. Fixed a possible infinite recursion problem when `fc ""=abc' (a null |
| pattern) is used to re-execute a previous command. |
| |
| mm. Fixed `declare [-a] var=value' to assign VALUE to element 0 if VAR is an |
| array variable. Similarly for `declare [-a] var[N]=value'. This is like |
| ksh93. |
| |
| nn. Fixed a bug that caused `read -a aname' to work even if ANAME had been |
| declared readonly. |
| |
| oo. Fixed a possible integer overflow problem when constructing names for |
| temporary files. |
| |
| 2. New Features in Bash |
| |
| a. Added support for DESTDIR installation root prefix, so you can do a |
| `make install DESTDIR=bash-root' and do easier binary packaging. |
| |
| b. Added support for builtin printf "'" flag character as per latest POSIX |
| drafts. |
| |
| c. Support for POSIX.2 printf(1) length specifiers `j', `t', and `z' (from |
| ISO C99). |
| |
| d. New autoconf macro, RL_LIB_READLINE_VERSION, for use by other applications |
| (bash doesn't use very much of what it returns). |
| |
| e. `set [-+]o nolog' is recognized as required by the latest POSIX drafts, |
| but ignored. |
| |
| f. New read-only `shopt' option: login_shell. Set to non-zero value if the |
| shell is a login shell. |
| |
| g. New `\A' prompt string escape sequence; expands to time in 24 HH:MM format. |
| |
| h. New `-A group/-g' option to complete and compgen; does group name |
| completion. |
| |
| i. New `-t' option to `hash' to list hash values for each filename argument. |
| |
| j. New [-+]O invocation option to set and unset `shopt' options at startup. |
| |
| k. configure's `--with-installed-readline' option now takes an optional |
| `=PATH' suffix to set the root of the tree where readline is installed |
| to PATH. |
| |
| l. The ksh-like `ERR' trap has been added. The `ERR' trap will be run |
| whenever the shell would have exited if the -e option were enabled. |
| It is not inherited by shell functions. |
| |
| m. `readonly', `export', and `declare' now print variables which have been |
| given attributes but not set by assigning a value as just a command and |
| a variable name (like `export foo') when listing, as the latest POSIX |
| drafts require. |
| |
| n. `bashbug' now requires that the subject be changed from the default. |
| |
| o. configure has a new `--enable-largefile' option, like other GNU utilities. |
| |
| p. `for' loops now allow empty word lists after `in', like the latest POSIX |
| drafts require. |
| |
| 3. Changes to Readline |
| |
| a. More `const' and type casting fixes. |
| |
| b. Changed rl_message() to use vsnprintf(3) (if available) to fix buffer |
| overflow problems. |
| |
| c. The completion code no longer appends a `/' or ` ' to a match when |
| completing a symbolic link that resolves to a directory name, unless |
| the match does not add anything to the word being completed. This |
| means that a tab will complete the word up to the full name, but not |
| add anything, and a subsequent tab will add a slash. |
| |
| d. Fixed a trivial typo that made the vi-mode `dT' command not work. |
| |
| e. Fixed the tty code so that ^S and ^Q can be inserted with rl_quoted_insert. |
| |
| f. Fixed the tty code so that ^V works more than once. |
| |
| g. Changed the use of __P((...)) for function prototypes to PARAMS((...)) |
| because the use of __P in typedefs conflicted g++ and glibc. |
| |
| 4. New Features in Readline |
| |
| a. Added extern declaration for rl_get_termcap to readline.h, making it a |
| public function (it was always there, just not in readline.h). |
| |
| b. New #defines in readline.h: RL_READLINE_VERSION, currently 0x0402, |
| RL_VERSION_MAJOR, currently 4, and RL_VERSION_MINOR, currently 2. |
| |
| c. New readline variable: rl_readline_version, mirrors RL_READLINE_VERSION. |
| |
| d. New bindable boolean readline variable: match-hidden-files. Controls |
| completion of files beginning with a `.' (on Unix). Enabled by default. |
| |
| e. The history expansion code now allows any character to terminate a |
| `:first-' modifier, like csh. |
| |
| f. The incremental search code remembers the last search string and uses |
| it if ^R^R is typed without a search string. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05-release, |
| and the previous version, bash-2.05-beta2. |
| |
| 1. Changes to Bash |
| |
| a. Make sure we note that the first line of a multi-line command was not |
| saved in the history if the tests for HISTCONTROL succeed, but the |
| HISTIGNORE check fails. |
| |
| b. Fixed a bug in the pattern matching code that caused `[' to be treated |
| as a special character inside a `[...]' bracket expression. |
| |
| c. Fixed a bug in the pattern matching code that caused `]' to terminate |
| a bracket expression even if it was the first character after the `[' |
| (or a leading `!' or `^'). |
| |
| d. Made a small change to report a more user-friendly error message if |
| execve(2) fails because of an error with the interpreter in a script |
| with a leading `#! interpreter'. |
| |
| e. If the OS does not support an exec(2) magic number of `#!', make sure we |
| have a non-null interpreter name before attempting to execute it. |
| |
| f. Fixed a bug that caused the shell process to end up in a different |
| process group than the controlling terminal if a job-control shell was |
| run with `exec' in the startup files. |
| |
| g. When started in POSIX mode, either by `bash --posix', `bash -o posix', or |
| `sh', $SHELLOPTS includes `posix' and POSIXLY_CORRECT is set. |
| |
| h. Fixed a problem that caused the `\W' prompt string escape sequence to |
| expand to nothing when $PWD was `//'. |
| |
| i. The `bashbug' shell script no longer uses $(...) command substitution. |
| |
| j. When `set' is invoked without options in POSIX mode, it no longer prints |
| the names and definitions of shell functions. |
| |
| 2. Changes to Readline |
| |
| a. rl_set_paren_blink_timeout() is now documented. |
| |
| b. Corrected history.3 man page: `$' is not in the default value of |
| history_word_delimiters. |
| |
| c. If a hook function assigned to rl_event_hook sets rl_done to a non-zero |
| value, rl_read_key() now immediately returns '\n' (which is assumed to |
| be bound to accept-line). |
| |
| 3. New Features in Bash |
| |
| a. The `>&word' redirection now works in POSIX mode as it does by default, |
| since POSIX.2 leaves it unspecified. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05-beta2, |
| and the previous version, bash-2.05-beta1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug in the arithmetic evaluation code so that a^=b is supported. |
| |
| b. Fixed startup so posixly_correct is retained across subshells begun to |
| execute scripts without a leading `#!'. |
| |
| c. Fixed a bug that caused $(< file) to not work in a (...) subshell. |
| |
| d. Added config support for Linux running on the IBM S390. |
| |
| e. Fixed a bug that caused bash to get its input pointer out of sync when |
| reading commands through a pipe and running a command with standard |
| input redirected from a file. |
| |
| f. Made a change so that command completion now makes about half as many |
| stat(2) calls when searching the $PATH. |
| |
| g. Fixed a bug that caused variable assignments preceding `return' to not |
| be propagated to the shell environment in POSIX mode. |
| |
| h. Fixed a bug with ${parameter[:]?word} -- tilde expansion was not performed |
| on `word'. |
| |
| i. In POSIX mode, `break' and `continue' do not complain and return success |
| if called when the shell is not executing a loop. |
| |
| j. Fixed `bash -o posix' to work the same as `bash --posix'. |
| |
| k. Fixed a bug where variable assignments preceding `eval' or `source/.' |
| would not show up in the environment exported to subshells run by the |
| commands. |
| |
| l. In POSIX mode, shells started to execute command substitutions inherit |
| the value of the `-e' option from their parent shell. |
| |
| m. In POSIX mode, aliases are expanded even in non-interactive shells. |
| |
| n. Changed some of the job control messages to display the text required by |
| POSIX.2 when the shell is in POSIX mode. |
| |
| o. Fixed a bug in `test' that caused it to occasionally return incorrect |
| results when non-numeric arguments were supplied to `-t'. |
| |
| 2. Changes to Readline |
| |
| a. Some changes were made to avoid gcc warnings with -Wall. |
| |
| b. rl_get_keymap_by_name now finds keymaps case-insensitively, so |
| `set keymap EMACS' works. |
| |
| c. The history file writing and truncation functions now return a useful |
| status on error. |
| |
| d. Fixed a bug that could cause applications to dereference a NULL pointer |
| if a NULL second argument was passed to history_expand(). |
| |
| 3. New Features in Bash |
| |
| a. doc/readline.3 has been moved to the readline distribution. |
| |
| 4. New Features in Readline |
| |
| a. New function, rl_get_screen_size (int *rows, int *columns), returns |
| readline's idea of the screen dimensions. |
| |
| b. The timeout in rl_gather_tyi (readline keyboard input polling function) |
| is now settable via a function (rl_set_keyboard_input_timeout()). |
| |
| c. Renamed the max_input_history variable to history_max_entries; the old |
| variable is maintained for backwards compatibility. |
| |
| d. The list of characters that separate words for the history tokenizer is |
| now settable with a variable: history_word_delimiters. The default |
| value is as before. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05-beta1, |
| and the previous version, bash-2.05-alpha1. |
| |
| 1. Changes to Bash |
| |
| a. Changes to allow shared library and object building on the GNU Hurd. |
| |
| b. Fixes to the way exported functions are placed into the environment and |
| cached. |
| |
| c. The globbing library once again respects locales when processing ranges |
| in bracket expressions while doing pattern matching. |
| |
| d. System-specific configuration changes for: Tru 64, Interix |
| |
| e. Bashbug now uses /usr/bin/editor as one of the editing alternatives, and |
| will use mktemp(1) or tempfile(1), if present, for temporary file creation. |
| |
| f. Bash no longer performs a binary file check on a script argument that's |
| really a tty (like /dev/fd/0 or /dev/stdin). |
| |
| g. Fixed a bug in the execution of shell scripts that caused the effects of |
| $BASH_ENV to be undone in some cases. |
| |
| h. Fixed several bugs that made `bash [-i] /dev/stdin' not work correctly. |
| |
| i. Several changes to the job control code to avoid some signal state |
| manipulation. |
| |
| j. The Bash malloc no longer blocks signals as often, which should make it |
| faster. |
| |
| k. Fixed a parsing bug that did not allow backslash to escape a single quote |
| inside a $'...' construct. |
| |
| l. Fixed a bug that caused things like ${var:=$'value'} to be parsed |
| incorrectly. This showed up in newer versions of autoconf. |
| |
| m. Fixed a bug in the bash-specific readline initialization that caused |
| key bindings to bash-specific function names appearing in .inputrc to |
| not be honored. |
| |
| n. Bash now sets the file descriptor it uses to save the file descriptor |
| opened on a shell script to close on exec. |
| |
| o. Fixed a bug in the prompt string decoding that caused it to misbehave |
| when presented an octal sequence of fewer than three characters. |
| |
| p. Fixed the `test' builtin to return an error if `[' is supplied a single |
| argument that is not `]'. |
| |
| q. Fixed a bug that caused subshells started to run executable shell scripts |
| without a leading `#!' to incorrectly inherit an argument list preceding |
| a shell builtin (like such a script called from a script sourced with `.', |
| where there were variable assignments preceding the `.' command) |
| |
| r. Fixed a bug that caused changes to variables supplied in an assignment |
| statement preceding a shell builtin to not be honored (like a script |
| run with `.'). |
| |
| s. HOSTTYPE, OSTYPE, and MACHTYPE are set only if they do not have values |
| when the shell is started. |
| |
| t. Fixed a bug that caused SIGINT to kill shell scripts after the script |
| called `wait'. |
| |
| u. The `fc' builtin now tries to create its temporary files in the directory |
| named by $TMPDIR. |
| |
| v. Bash no longer calls any Readline functions or uses any Readline variables |
| not declared in readline.h. |
| |
| w. Fixed a bug that caused some substitutions involving $@ to not be split |
| correctly, especially expansions of the form ${paramterOPword}. |
| |
| x. SSH2_CLIENT is now treated like SSH_CLIENT and not auto-exported if it |
| appears in the initial environment. |
| |
| y. Fixed a couple of problems with shell scripts without a leading `#!' |
| being executed out of shell functions that could cause core dumps if |
| such a script attempted to execute `return'. |
| |
| z. Fixed a problem with the `-nt' and `-ot' binary operators for the |
| `test/[' builtin and the `[[' conditional command that caused wrong |
| return values if one of the file arguments did not exist. |
| |
| aa. Fixed a bug that caused non-interactive shells which had previously |
| executed `shopt -s expand_aliases' to fail to expand aliases in a |
| command like `(command) &'. |
| |
| 2. Changes to Readline |
| |
| a. Changes to make most (but not yet all -- there is still crlf()) of the |
| exported readline functions declared in readline.h have an rl_ prefix. |
| |
| b. More `const' changes in function arguments, mostly for completion |
| functions. |
| |
| c. Fixed a bug in rl_forward that could cause the point to be set to before |
| the beginning of the line in vi mode. |
| |
| d. Fixed a bug in the callback read-char interface to make it work when a |
| readline function pushes some input onto the input stream with |
| rl_execute_next (like the incremental search functions). |
| |
| e. Fixed a file descriptor leak in the history file manipulation code that |
| was tripped when attempting to truncate a non-regular file (like |
| /dev/null). |
| |
| f. Some existing variables are now documented and part of the public |
| interface (declared in readline.h): rl_explict_arg, rl_numeric_arg, |
| rl_editing_mode, rl_last_func. |
| |
| g. Renamed rltty_set_default_bindings to rl_tty_set_default_bindings and |
| crlf to rl_crlf, so there are no public functions declared in readline.h |
| without an `rl_' prefix. The old functions still exist for backwards |
| compatibility. |
| |
| 3. New Features in Bash |
| |
| a. A new loadable builtin, realpath, which canonicalizes and expands symlinks |
| in pathname arguments. |
| |
| b. When `set' is called without options, it prints function defintions in a |
| way that allows them to be reused as input. This affects `declare' and |
| `declare -p' as well. |
| |
| 4. New Features in Readline |
| |
| a. New application-callable function rl_set_prompt(const char *prompt): |
| expands its prompt string argument and sets rl_prompt to the result. |
| |
| b. New application-callable function rl_set_screen_size(int rows, int cols): |
| public method for applications to set readline's idea of the screen |
| dimensions. |
| |
| c. The history example program (examples/histexamp.c) is now built as one |
| of the examples. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.05-alpha1, |
| and the previous version, bash-2.04-release. |
| |
| 1. Changes to Bash |
| |
| a. A fix was made to allow newlines in compond array assignments. |
| |
| b. configure now checks for real-time signals with unusable values. |
| |
| c. Interactive shells no longer exit if a substitution fails because of an |
| unset variable within a sourced file. |
| |
| d. Fixed a problem with incorrect matching of extended glob patterns when |
| doing pattern substitution. |
| |
| e. `{' is now quoted by the completion code when it appears in a filename. |
| |
| f. Fixed an error in pattern matching that caused the matcher to not |
| correctly skip the rest of a bracket expression after a character |
| matched. |
| |
| g. Fixed a bug in the IFS word splitting code to make a non-whitespace IFS |
| character preceded by IFS whitespace part of the current delimiter rather |
| than generating a separate field. |
| |
| h. The {!prefix@} expansion now generates separate words, analogous to $@, |
| when double-quoted. |
| |
| i. Command substitution now ignores NUL bytes in the command output, and the |
| parser ignores them on input. |
| |
| j. A fix was made to the job control code to prevent hanging processes when |
| the shell thinks background processes are running but the kernel returns |
| -1/ECHILD from waitpid(). |
| |
| k. `pwd' now prints an error message if the write fails when displaying the |
| current directory. |
| |
| l. When in POSIX mode, the shell prints trap dispostions without a leading |
| `SIG' in the signal specification. |
| |
| m. Fixed a parser bug that caused the current command's line count to be |
| messed up by a compound array assignment. |
| |
| n. Fixed a bug in the unwind-protect code that caused bad behavior on machines |
| where ints and pointers are not the same size. |
| |
| o. System-specific configure changes for: MacOS X. |
| |
| p. Changes for Cygwin to translate \r\n and \r to \n and to set file |
| descriptors used for reading input to text mode in various places. |
| |
| q. Fixed a bug that caused `!' to occasionally not be honored when in |
| a (...) subshell. |
| |
| r. Bash no longer assumes that getcwd() will return any useful error message |
| in the buffer passed as an argument if the call fails. |
| |
| s. The `source', `.', and `fc' builtins no longer check whether a file is |
| binary before reading commands from it. |
| |
| t. Subshells no longer turn off job control when they exit, since that |
| sometimes resulted in the terminal being reset to the wrong process |
| group. |
| |
| u. The history code no longer tries to save the second and subsequent lines |
| of a multi-line command if the first line was not saved. |
| |
| v. The history saving code now does a better job of saving blank lines in a |
| multi-line command. |
| |
| w. Removed a `feature' that made `ulimit' silently translate `unlimited' to |
| the current hard limit, which obscured some kernel error returns. |
| |
| x. Fixed the grammar so that `}' is recognized as a reserved word after |
| another reserved word, rather than requiring a `;' or newline. This |
| means that constructs like |
| |
| { { echo a b c ; } } |
| |
| work as expected. |
| |
| y. Conditional commands ([[...]]) now perform tilde expansion on their |
| arguments. |
| |
| z. Noted in the documentation that `set -a' will cause functions to be |
| exported if they are defined after `set -a' is executed. |
| |
| aa. When an interactive login shell starts, if $PWD and $HOME refer to the |
| same directory but are not the same string, $PWD is set to $HOME. |
| |
| bb. Fixed `printf' to handle invalid floating point numbers better. |
| |
| cc. Temporary files are now created with random filenames, to improve security. |
| |
| dd. The readline initialization code now binds the custom bash functions and |
| key bindings after the readline defaults are set up. |
| |
| ee. Fixed the `source' builtin to no longer overwrite a shell function's |
| argument list, even if the sourced file changes the positional parameters. |
| |
| ff. A bug fix was made in the expansion of `$*' in contexts where it should |
| not be split, like assignment statements. |
| |
| gg. Fixed a bug in the parameter substring expansion to handle conditional |
| arithmetic expressions ( exp ? val1 : val2 ) without cutting the expression |
| off at the wrong `:'. |
| |
| hh. The `<>' redirection is no longer subject to the current setting of |
| `noclobber', as POSIX.2 specifies. |
| |
| ii. Fixed a bug in the conditional command parsing code that caused expressions |
| in parentheses to occasionally be parsed incorrectly. |
| |
| jj. Fixed a bug in the ((...)) arithmetic command to allow do...done or |
| {...} to follow the )) without an intervening list terminator. |
| |
| kk. `printf' now treats `\E' the same as `\e' when performing backslash escape |
| expansion for the `%b' format specifier. |
| |
| ll. When in POSIX mode, the shell no longer searches the current directory for |
| a file to be sourced with `.' or `source' if `.' is not in $PATH. |
| |
| mm. Interactive comments are no longer turned off when POSIX mode is disabled. |
| |
| nn. The UID, EUID, HOSTNAME variables are not set if they are in the shell's |
| environment when it starts up. |
| |
| oo. Fixed a bug in the `command' builtin so the effect of a command like |
| `command exec 4<file' is as if the `command' had been omitted. |
| |
| pp. ${foo[@]} and ${foo[*]} now work as in ksh93 if `foo' is not an array |
| variable. |
| |
| qq. ${#foo[X]}, where X is 0, @, or *, now work as in ksh93 if `foo' is not |
| an array variable. |
| |
| rr. The shell's idea of an absolute pathname now takes into account a |
| possible drive specification on Cygwin and other Windows systems. |
| |
| ss. Fixed a bug which caused incorrect parsing of some multi-character |
| constructs if they were split across input lines with backslash-newline |
| line continuation. |
| |
| tt. Fixed a bug that caused restricted shell mode to be set inappropriately |
| when trying to execute a shell script without a leading `#!'. |
| |
| uu. Shell function definitions no longer require that the body be a group |
| command ( {...} ), as POSIX.2 requires. |
| |
| vv. The `cd' and `pwd' builtins now process symlinks in pathnames internally |
| and should require many fewer calls to getcwd(). |
| |
| ww. Fixed a bug that caused a pipeline's process group to be set incorrectly |
| if one of the pipeline elements contained a command substitution. |
| |
| xx. Fixed a bug that caused core dumps when expanding the value of HISTIGNORE. |
| |
| yy. The output of `set' is now quoted using $'...' so invisible characters are |
| displayed as escape sequences. |
| |
| zz. Fixed the help text for `unset', since PATH and IFS may both be unset. |
| |
| aaa. The shell no longer puts directory names into the command hash table. |
| |
| bbb. Fixed a bug in `read' that caused it to occasionally free memory twice if |
| it was interrupted after reading a large amount of data. |
| |
| ccc. Assignment statements that attempt to assign values to readonly variables |
| now cause the command to return an error status. |
| |
| ddd. Fixed a bug that could cause incorrect output if a $(<file) construct was |
| interrupted. |
| |
| eee. GROUPS and FUNCNAME now return an error status when assignment is |
| attempted, but may be unset (in which case they lose their special |
| properties). In all respects except unsetting, they are readonly. |
| |
| fff. The string-to-integer conversion code now ignores trailing whitespace in |
| the string, even if strtol(3) does not. |
| |
| ggg. The tcsh magic-space function now does a better job of inserting the |
| space close to where the point was before the history expansion, rather |
| than just appending it. |
| |
| hhh. Fixed a bug which caused a file sourced from an interactive shell to |
| fill up the jobs table if it ran lots of jobs. |
| |
| iii. Fixed a bug in the parameter pattern substitution code to avoid infinite |
| recursion on zero-length matches. |
| |
| 2. Changes to Readline |
| |
| a. When setting the terminal attributes on systems using `struct termio', |
| readline waits for output to drain before changing the attributes. |
| |
| b. A fix was made to the history word tokenization code to avoid attempts to |
| dereference a null pointer. |
| |
| c. Readline now defaults rl_terminal_name to $TERM if the calling application |
| has left it unset, and tries to initialize with the resultant value. |
| |
| d. Instead of calling (*rl_getc_function)() directly to get input in certain |
| places, readline now calls rl_read_key() consistently. |
| |
| e. Fixed a bug in the completion code that allowed a backslash to quote a |
| single quote inside a single-quoted string. |
| |
| f. rl_prompt is no longer assigned directly from the argument to readline(), |
| but uses memory allocated by readline. This allows constant strings to |
| be passed to readline without problems arising when the prompt processing |
| code wants to modify the string. |
| |
| g. Fixed a bug that caused non-interactive history searches to return the |
| wrong line when performing multiple searches backward for the same string. |
| |
| h. Many variables, function arguments, and function return values are now |
| declared `const' where appropriate, to improve behavior when linking with |
| C++ code. |
| |
| i. The control character detection code now works better on systems where |
| `char' is unsigned by default. |
| |
| j. The vi-mode numeric argument is now capped at 999999, just like emacs mode. |
| |
| k. The Function, CPFunction, CPPFunction, and VFunction typedefs have been |
| replaced with a set of specific prototyped typedefs, though they are |
| still in the readline header files for backwards compatibility. |
| |
| m. Nearly all of the (undocumented) internal global variables in the library |
| now have an _rl_ prefix -- there were a number that did not, like |
| screenheight, screenwidth, alphabetic, etc. |
| |
| n. The ding() convenience function has been renamed to rl_ding(), though the |
| old function is still defined for backwards compatibility. |
| |
| o. The completion convenience functions filename_completion_function, |
| username_completion_function, and completion_matches now have an rl_ |
| prefix, though the old names are still defined for backwards compatibility. |
| |
| p. The functions shared by readline and bash (linkage is satisfied from bash |
| when compiling with bash, and internally otherwise) now have an sh_ prefix. |
| |
| q. Changed the shared library creation procedure on Linux and BSD/OS 4.x so |
| that the `soname' contains only the major version number rather than the |
| major and minor numbers. |
| |
| r. Fixed a redisplay bug that occurred when the prompt spanned more than one |
| physical line and contained invisible characters. |
| |
| 3. New Features in Bash |
| |
| a. Added a new `--init-file' invocation argument as a synonym for `--rcfile', |
| per the new GNU coding standards. |
| |
| b. The /dev/tcp and /dev/udp redirections now accept service names as well as |
| port numbers. |
| |
| c. `complete' and `compgen' now take a `-o value' option, which controls some |
| of the aspects of that compspec. Valid values are: |
| |
| default - perform bash default completion if programmable |
| completion produces no matches |
| dirnames - perform directory name completion if programmable |
| completion produces no matches |
| filenames - tell readline that the compspec produces filenames, |
| so it can do things like append slashes to |
| directory names and suppress trailing spaces |
| |
| 4. New Features in Readline |
| |
| a. The blink timeout for paren matching is now settable by applications. |
| |
| b. _rl_executing_macro has been renamed to rl_executing_macro, which means |
| it's now part of the public interface. |
| |
| c. Readline has a new variable, rl_readline_state, which is a bitmap that |
| encapsulates the current state of the library; intended for use by |
| callbacks and hook functions. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.04-release, |
| and the previous version, bash-2.04-beta5. |
| |
| 1. Changes to Bash |
| |
| a. Better compile-time and configure-time checks for the necessity of |
| inet_aton(). |
| |
| b. A bug was fixed in the expansion of "${@:-}" when there are positional |
| parameters. |
| |
| c. A typo was fixed in the output of `complete'. |
| |
| d. The matches generated for a word by the `-W' argument to complete and |
| compgen are now matched against the word being completed, and only |
| matches are returned as the result. |
| |
| e. Some fixes were made for systems which do not restart read(2) when a |
| signal caught by bash is received. |
| |
| f. A bug was fixed which caused the umask to be set to 0 when an invalid |
| symbolic mode mask was parsed. |
| |
| g. Fixed a bug that could cause a core dump if a SIGCHLD was received while |
| performing an assignment statement using command substitution. |
| |
| h. Changed the word splitting function for programmable completion so cases |
| in which the cursor is between words are handled a bit better. |
| |
| 2. Changes to Readline |
| |
| a. rl_funmap_names() is now documented. |
| |
| 3. New Features in Bash |
| |
| a. The LC_NUMERIC variable is now treated specially, and used to set the |
| LC_NUMERIC locale category for number formatting, e.g., when `printf' |
| displays floating-point numbers. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.04-beta5, |
| and the previous version, bash-2.04-beta4. |
| |
| 1. Changes to Bash |
| |
| a. A couple of changes were made to the Makefiles for easier building on |
| non-Unix systems. |
| |
| b. Fixed a bug where the current prompt would be set to $PS2 at startup. |
| |
| c. The shell script that tests an already-installed version was changed to |
| remove the directory it created its test programs in at exit. |
| |
| d. Several changes were made to the code that tokenizes an input line for |
| the programmable completion code. Shell metacharacters will now appear |
| as individual words in the word list passed to the completion functions. |
| Some of the example completion shell functions were changed to understand |
| redirection operators. |
| |
| e. A bug was fixed that, under obscure circumstances, could confuse the |
| parser when a shell function was run by the programmable completion code. |
| |
| f. A bug was fixed in the ulimit builtin for systems not using getrlimit(). |
| |
| g. The execution code now propagates the correct exit status back to the rest |
| of the code if the return value of a subshell command was being inverted. |
| Some new test cases for inverting return values with the `!' reserved |
| word have been added. |
| |
| h. Negative exponents in the arithmetic evaluation of v**e now return an |
| evaluation error. |
| |
| i. A bug that caused bash to check the wrong process in a pipeline for |
| abnormal termination (and consequently resetting the terminal attributes) |
| was fixed. |
| |
| j. Fixed a bug that caused $PS2 to be displayed after PROMPT_COMMAND was |
| executed. |
| |
| 2. Changes to Readline |
| |
| 1. Fixed a bug in a C preprocessor define that caused the keypad control |
| functions to be compiled out for all platforms except DJGPP. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.04-beta4, |
| and the previous version, bash-2.04-beta3. |
| |
| 1. Changes to Bash |
| |
| a. A couple of changes were made to the redirection to attempt to avoid |
| race conditions and malicious file replacement. |
| |
| 2. A change was made to the string evaluation code (used for command |
| substitution, `eval', and the `.' builtin) to fix an obscure core |
| dump on alpha machines. |
| |
| 3. A bug that caused $LINENO to be wrong when executing arithmetic for |
| commands was fixed. |
| |
| 4. A couple of memory leaks in the programmable completion code were fixed. |
| |
| 5. A bug that could cause a core dump by freeing memory twice during a call |
| to `eval' if `set -u' had been enabled and an undefined variable was |
| referenced was fixed. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.04-beta3, |
| and the previous version, bash-2.04-beta2. |
| |
| 1. Changes to Bash |
| |
| a. Bash should run the appropriate startup files when invoked by ssh2. |
| |
| b. Fixed a bug in the parsing of conditional commands that could cause a |
| core dump. |
| |
| c. Fixed a bug in parsing job specifications that occasionally caused |
| core dumps when an out-of-range job was referenced. |
| |
| d. Fixed the `type' and `command' builtins to do better reporting of |
| commands that are not found in $PATH or the hash table. |
| |
| e. Fixed a POSIX.2 compliance problem in the command builtin -- commands |
| are supposed to be reported as full pathnames. |
| |
| f. The `echo' builtin now returns failure if a write error occurs. |
| |
| g. Fixed a bug which caused the locale to not be reset correctly when |
| LC_ALL was unset. |
| |
| h. Changed description of `getopts' in man page and reference manual to make |
| it clear that option characters may be characters other than letters. |
| |
| i. If the shell exits while in a function, make sure that any trap on EXIT |
| doesn't think the function is still executing. |
| |
| j. Bashbug now tries harder to find a usable editor if $EDITOR is not set, |
| rather than simply defaulting to `emacs'. |
| |
| k. Changes to the scripts that guess and canonicalize the system type, from |
| the latest `automake' distribution via Debian. |
| |
| l. When using named pipes for process substitution, make sure the file |
| descriptors opened for reading are set to non-blocking mode. |
| |
| m. Fixed a bug that caused termination of pipelines that are killed by a |
| signal to not be reported in some cases. |
| |
| n. When not in literal-history mode, shell comment lines are not added to |
| the history list. |
| |
| o. When running in POSIX.2 mode, bash no longer performs word splitting on |
| the expanded value of the word supplied as the filename argument to |
| redirection operators. |
| |
| p. The prompt string decoding code now backslash-quotes only characters that |
| are special within double quotes when expanding the \w and \W escape |
| sequences. |
| |
| q. Fixed a bug in the prompt decoding code that could cause a non-interactive |
| shell to seg fault if `\u' was used in PS4 and the shell was in xtrace |
| mode. |
| |
| r. Fixed a bug that caused function definitions to be printed with any |
| redirections that should be attached to the entire function before the |
| closing brace. |
| |
| s. Changed the tilde expansion code for Cygwin systems to avoid creating |
| pathnames beginning with `//' if $HOME == `/'. |
| |
| t. Fixed a couple of autoconf tests to avoid creating files with fixed names |
| in /tmp. |
| |
| u. The `trap' and `kill' builtins now know the names of the POSIX.1b real- |
| time signals on systems which support them. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a problem with the single-quote quoting function that could cause |
| buffer overflows. |
| |
| b. Fixed a bug that caused incorrect `stat characters' to be printed if |
| the files being completed were in the root directory and visible-stats |
| was enabled. |
| |
| 3. New Features in Bash |
| |
| a. There is a new `rbash.1' manual page, from the Debian release. |
| |
| b. The `--enable-usg-echo-default' option to `configure' has been renamed to |
| `--enable-xpg-echo-default'. The old option is still there for backwards |
| compatibility. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.04-beta2, |
| and the previous version, bash-2.04-beta1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that could cause pipes to be closed inappropriately in |
| some obscure cases. |
| |
| b. Fixed a bug that caused creation of the exported environment to clobber |
| the current command string if there were any exported shell functions. |
| |
| c. Some changes were made to reduce bash's memory usage. |
| |
| d. Fixed a problem with programmable completion and filenames to be |
| completed containing quote characters. |
| |
| e. Changed the code the removes named pipes created for the <(...) and >(...) |
| expansions to defer removal until after any current shell function has |
| finished executing. |
| |
| f. Fixed a bug in `select' which caused it to not handle the `continue' |
| builtin correctly. |
| |
| g. Autoconf tests added for cygwin32 and mingw32. |
| |
| 2. New Features in Bash |
| |
| a. The `--with-bash-malloc' configure option replaces `--with-gnu-malloc' |
| (which is still there for backwards compatibility). |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.04-beta1, |
| and the previous version, bash-2.04-alpha1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug in the programmable completion code that occurred when |
| trying to complete command lines containing a `;' or `@'. |
| |
| b. The file descriptor from which the shell is reading a script is now |
| moved to a file descriptor above the user-addressible range. |
| |
| c. Changes to `printf' so that it can handle integers beginning with 0 |
| or 0x as octal and hex, respectively. |
| |
| d. Fixes to the programmable completion code so it handles nonsense like |
| `compgen -C xyz' gracefully. |
| |
| e. The shell no longer modifies the signal handler for SIGPROF, allowing |
| profiling again on certain systems. |
| |
| f. The shell checks for a new window size, if the user has requested it, |
| after a process exits due to a signal. |
| |
| g. Fixed a bug with variables with null values in a program's temporary |
| environment and the bash getenv() replacement. |
| |
| h. `declare' and the other builtins that take variable assignments as |
| arguments now honor `set -a' and mark modified variables for export. |
| |
| i. Some changes were made for --dump-po-strings mode when writing strings |
| with embedded newlines. |
| |
| j. The code that caches export strings from the initial environment now |
| duplicates the string rather than just pointing into the environment. |
| |
| k. The filename completion quoting code now uses single quotes by default |
| if the filename being completed contains newlines, since \<newline> |
| has a special meaning to the parser. |
| |
| l. Bash now uses typedefs bits32_t and u_bits32_t instead of int32_t and |
| u_int32_t, respectively to avoid conflicts on certain Unix versions. |
| |
| m. Configuration changes were made for: Rhapsody, Mac OS, FreeBSD-3.x. |
| |
| n. Fixed a problem with hostname-to-ip-address translation in the |
| /dev/(tcp|udp)/hostname/port redirection code. |
| |
| o. The texinfo manual has been reorganized slightly. |
| |
| p. Filename generation (globbing) range comparisons in bracket expressions |
| no longer use strcoll(3) even if it is available, since it has unwanted |
| effects in certain locales. |
| |
| q. Fixed a cosmetic problem in the source that caused the shell to not |
| compile if DPAREN_ARITHMETIC was not defined but ARITH_FOR_COMMAND was. |
| |
| r. Fixed a bug in the here-document code tripped when the file descriptor |
| opened to the file containing the text of the here document was the |
| same as a redirector specified by the user. |
| |
| s. Fixed a bug where the INVERT_RETURN flag was not being set for `pipeline' |
| in `time ! pipeline'. |
| |
| t. Fixed a bug with the `wait' builtin which manifested itself when an |
| interrupt was received while the shell was waiting for asynchronous |
| processes in a shell script. |
| |
| u. Fixed the DEBUG trap code so that it has the correct value of $?. |
| |
| v. Fixed a bug in the parameter pattern substitution code that could cause |
| the shell to attempt to free unallocated memory if the pattern started |
| with `/' and an expansion error occurs. |
| |
| w. Fixed a bug in the positional parameter substring code that could |
| cause the shell to loop freeing freed memory. |
| |
| x. Fixed a bug in the positional parameter pattern substitution code so |
| that it correctly handles null replacement strings with a pattern |
| string prefixed with `%' or `#'. |
| |
| y. The shell no longer attempts to import functions from the environment if |
| started with `-n'. |
| |
| z. Fixed a bug that caused `return' in a command substitution executed in |
| a shell function to return from the function in a subshell and continue |
| execution. |
| |
| aa. `hash -p /pathname/with/slashes name' is no longer allowed when the shell |
| is restricted. |
| |
| bb. The wait* job control functions now behave better if called when there |
| are no unwaited-for children. |
| |
| cc. Command substitution no longer unconditionally disables job control in |
| the subshell started to run the command. |
| |
| dd. A bug was fixed that occasionally caused traps to mess up the parser |
| state. |
| |
| ee. `bashbug' now honors user headers in the mail message it sends. |
| |
| ff. A bug was fixed that caused the `:p' history modifier to not print the |
| history expansion if the `histverify' option was set. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug in the redisplay code for lines with more than 256 line |
| breaks. |
| |
| b. A bug was fixed which caused invisible character markers to not be |
| stripped from the prompt string if the terminal was in no-echo mode. |
| |
| c. Readline no longer tries to get the variables it needs for redisplay |
| from the termcap entry if the calling application has specified its |
| own redisplay function. Readline treats the terminal as `dumb' in |
| this case. |
| |
| d. Fixes to the SIGWINCH code so that a multiple-line prompt with escape |
| sequences is redrawn correctly. |
| |
| 3. New Features in Bash |
| |
| a. `bashbug' now accepts `--help' and `--version' options. |
| |
| b. There is a new `xpg_echo' option to `shopt' that controls the behavior |
| of echo with respect to backslash-escaped characters at runtime. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.04-alpha1, |
| and the previous version, bash-2.04-devel. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a bug that could cause core dumps when performing substring |
| expansion. |
| |
| b. Shared object configuration changes for: Solaris, OSF/1 |
| |
| c. The POSIX_GLOB_LIBRARY code that uses the POSIX.2 globbing facilities |
| for pathname expansion now understands GLOBIGNORE. |
| |
| d. The code that implements `eval' was changed to save the value of the |
| current prompt, so an eval in a shell function called by the programmable |
| completion code will not change the prompt to $PS2. |
| |
| e. Restored the undocumented NON_INTERACTIVE_LOGIN_SHELLS #define to |
| config-top.h. If this is defined, all login shells will read the |
| startup files, not just interactive and non-interactive started with |
| the `--login' option. |
| |
| f. Fixed a bug that caused the expansion code to occasionally dump core if |
| IFS contained characters > 128. |
| |
| g. Fixed a problem with the grammar so that a newline is not required |
| after the `))' in the new-style arithmetic for statement; a semicolon |
| may be used as expected. |
| |
| h. Variable indirection may now reference the shell's special variables. |
| |
| i. The $'...' and $"..." constructs are now added to the history correctly |
| if they contain newlines and command-oriented history is enabled. |
| |
| j. It is now an error to try to assign a value to a function-local copy |
| of a readonly shell variable (declared with the `local' builtin). |
| |
| 2. Changes to Readline |
| |
| a. The history file code now uses O_BINARY mode when reading and writing |
| the history file on cygwin32. |
| |
| 3. New Features in Bash |
| |
| a. A new programmable completion facility, with two new builtin commands: |
| complete and compgen. |
| |
| b. configure has a new option, `--enable-progcomp', to compile in the |
| programmable completion features (enabled by default). |
| |
| c. `shopt' has a new option, `progcomp', to enable and disable programmable |
| completion at runtime. |
| |
| d. Unsetting HOSTFILE now clears the list of hostnames used for completion. |
| |
| 4. New Features in Readline |
| |
| a. A new variable, rl_gnu_readline_p, always 1. The intent is that an |
| application can verify whether or not it is linked with the `real' |
| readline library or some substitute. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.04-devel, |
| and the previous version, bash-2.03-release. |
| |
| 1. Changes to Bash |
| |
| a. System-specific configuration and source changes for: Interix, Rhapsody |
| |
| b. Fixed a bug in execute_cmd.c that resulted in a compile-time error if |
| JOB_CONTROL was not defined. |
| |
| c. An obscure race condition in the trap code was fixed. |
| |
| d. The string resulting from $'...' is now requoted to avoid any further |
| expansion. |
| |
| e. The $'...' quoting syntax now allows backslash to escape a single quote, |
| for ksh-93 compatibility. |
| |
| f. The $"..." quoting syntax now escapes backslashes and double quotes in |
| the translated string when displaying them with the --dump-po-strings |
| option. |
| |
| g. `echo -e' no longer converts \' to '. |
| |
| h. Fixes were made to the extended globbing code to handle embedded (...) |
| patterns better. |
| |
| i. Some improvements were made to the code that unsets `nodelay' mode on |
| the file descriptor from which bash is reading input. |
| |
| j. Some changes were made to the replacement termcap library for better |
| operation on MS-DOS. |
| |
| k. Some changes were made to the tilde expansion code to handle backslash |
| as a pathname separator on MS-DOS. |
| |
| l. The source has been reorganized a little bit -- there is now an `include' |
| subdirectory, and lib/posixheaders has been removed. |
| |
| m. Improvements were made to the `read' builtin so that it makes many |
| fewer read(2) system calls. |
| |
| n. The expansion of $- will include `c' and `s' when those options are |
| supplied at shell invocation. |
| |
| o. Several improvments were made to the completion code: variable completion |
| now works better when there are unterminated expansions, command |
| completion understands quotes better, and completion now works in certain |
| unclosed $(... constructs. |
| |
| p. The arithmetic expansion code was fixed to not need the value of a |
| variable being assigned a value (fixes the "ss=09; let ss=10" bug). |
| |
| q. Some changes were made to make exported environment creation faster. |
| |
| r. The html documentation will be installed into $(htmldir) if that variable |
| has a value when `make install' is run. |
| |
| s. Fixed a bug that would cause the bashrc file to be sourced inappropriately |
| when bash is started by sshd. |
| |
| t. The SSH_CLIENT environment variable is no longer auto-exported. |
| |
| u. A bug that caused redirections with (...) subshells to be performed in |
| the wrong order was fixed. |
| |
| v. A bug that occasionally caused inappropriate expansion of assignment |
| statements in compound array assignments was fixed. |
| |
| w. The code that parses the words in a compound array assignment was |
| simplified considerably and should work better now. |
| |
| x. Fixes to the non-job-control code in nojobs.c to make it POSIX.2-compliant |
| when a user attempts to retrieve the status of a terminated background |
| process. |
| |
| y. Fixes to the `printf' builtin so that it doesn't try to expand all |
| backslash escape sequences in the format string before parsing it for |
| % format specifiers. |
| |
| 2. Changes to Readline |
| |
| a. The history library tries to truncate the history file only if it is a |
| regular file. |
| |
| b. A bug that caused _rl_dispatch to address negative array indices on |
| systems with signed chars was fixed. |
| |
| c. rl-yank-nth-arg now leaves the history position the same as when it was |
| called. |
| |
| d. Changes to the completion code to handle MS-DOS drive-letter:pathname |
| filenames. |
| |
| e. Completion is now case-insensitive by default on MS-DOS. |
| |
| f. Fixes to the history file manipulation code for MS-DOS. |
| |
| g. Readline attempts to bind the arrow keys to appropriate defaults on MS-DOS. |
| |
| h. Some fixes were made to the redisplay code for better operation on MS-DOS. |
| |
| i. The quoted-insert code will now insert tty special chars like ^C. |
| |
| j. A bug was fixed that caused the display code to reference memory before |
| the start of the prompt string. |
| |
| k. More support for __EMX__ (OS/2). |
| |
| l. A bug was fixed in readline's signal handling that could cause infinite |
| recursion in signal handlers. |
| |
| m. A bug was fixed that caused the point to be less than zero when rl_forward |
| was given a very large numeric argument. |
| |
| n. The vi-mode code now gets characters via the application-settable value |
| of rl_getc_function rather than calling rl_getc directly. |
| |
| 3. New Features in Bash |
| |
| a. The history builtin has a `-d offset' option to delete the history entry |
| at position `offset'. |
| |
| b. The prompt expansion code has two new escape sequences: \j, the number of |
| active jobs; and \l, the basename of the shell's tty device name. |
| |
| c. The `bind' builtin has a new `-x' option to bind key sequences to shell |
| commands. |
| |
| d. There is a new shell option, no_empty_command_completion, which, when |
| enabled, disables command completion when TAB is typed on an empty line. |
| |
| e. The `help' builtin has a `-s' option to just print a builtin's usage |
| synopsys. |
| |
| f. There are several new arithmetic operators: id++, id-- (variable |
| post-increment/decrement), ++id, --id (variabl pre-increment/decrement), |
| expr1 , expr2 (comma operator). |
| |
| g. There is a new ksh-93 style arithmetic for command: |
| for ((expr1 ; expr2; expr3 )); do list; done |
| |
| h. The `read' builtin has a number of new options: |
| -t timeout only wait timeout seconds for input |
| -n nchars only read nchars from input instead of a full line |
| -d delim read until delim rather than newline |
| -s don't echo input chars as they are read |
| |
| i. The redirection code now handles several filenames specially: |
| /dev/fd/N, /dev/stdin, /dev/stdout, and /dev/stderr, whether or |
| not they are present in the file system. |
| |
| j. The redirection code now recognizes pathnames of the form |
| /dev/tcp/host/port and /dev/udp/host/port, and tries to open a socket |
| of the appropriate type to the specified port on the specified host. |
| |
| k. The ksh-93 ${!prefix*} expansion, which expands to the names of all |
| shell variables whose names start with prefix, has been implemented. |
| |
| l. There is a new dynamic variable, FUNCNAME, which expands to the name of |
| a currently-executing function. Assignments to FUNCNAME have no effect. |
| |
| m. The GROUPS variable is no longer readonly; assignments to it are silently |
| discarded. This means it can be unset. |
| |
| 4. New Features in Readline |
| |
| a. Parentheses matching is now always compiled into readline, and enabled |
| or disabled when the value of the `blink-matching-paren' variable is |
| changed. |
| |
| b. MS-DOS systems now use ~/_inputrc as the last-ditch inputrc filename. |
| |
| c. MS-DOS systems now use ~/_history as the default history file. |
| |
| d. history-search-{forward,backward} now leave the point at the end of the |
| line when the string to search for is empty, like |
| {reverse,forward}-search-history. |
| |
| e. history-search-{forward,backward} now leave the last history line found |
| in the readline buffer if the second or subsequent search fails. |
| |
| f. New function for use by applications: rl_on_new_line_with_prompt, used |
| when an application displays the prompt itself before calling readline(). |
| |
| g. New variable for use by applications: rl_already_prompted. An application |
| that displays the prompt itself before calling readline() must set this to |
| a non-zero value. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.03-release, |
| and the previous version, bash-2.03-beta2. |
| |
| 1. Changes to Bash |
| |
| a. A file descriptor leak in the `fc' builtin was fixed. |
| |
| b. A bug was fixed in the `read' builtin that caused occasional spurious |
| failures when using `read -e'. |
| |
| c. The version code needed to use the value of the cpp variable |
| CONF_MACHTYPE rather than MACHTYPE. |
| |
| d. A new test was added to exercise the command printing and copying code. |
| |
| e. A bug was fixed that caused `time' to be recognized as a reserved word |
| if it was the first pattern in a `case' statement pattern list. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.03-beta2, |
| and the previous version, bash-2.03-beta1. |
| |
| 1. Changes to Bash |
| |
| a. Slight additions to support/shobj-conf, mostly for the benefit of AIX 4.2. |
| |
| b. config.{guess,sub} support added for the NEC SX4. |
| |
| c. Changed some of the cross-compiling sections of the configure macros in |
| aclocal.m4 so that configure won't abort. |
| |
| d. Slight changes to how the HTML versions of the bash and readline manuals |
| are generated. |
| |
| e. Fixed conditional command printing to avoid interpreting printf `%'-escapes |
| in arguments to [[. |
| |
| f. Don't include the bash malloc on all variants of the alpha processor. |
| |
| g. Changes to configure to make --enable-profiling work on Solaris 2.x. |
| |
| h. Fixed a bug that manifested itself when shell functions were called |
| between calls to `getopts'. |
| |
| i. Fixed pattern substitution so that a bare `#'as a pattern causes the |
| replacement string to be prefixed to the search string, and a bare |
| `%' causes the replacement string to be appended to the search string. |
| |
| j. Fixed a bug in the command execution code that caused child processes |
| to occasionally have the wrong value for $!. |
| |
| 2. Changes to Readline |
| |
| a. Added code to the history library to catch history substitutions using |
| `&' without a previous history substitution or search having been |
| performed. |
| |
| 3. New Features in Bash |
| |
| 4. New Features in Readline |
| |
| a. New bindable variable: `isearch-terminators'. |
| |
| b. New bindable function: `forward-backward-delete-char' (unbound by default). |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.03-beta1, |
| and the previous version, bash-2.03-alpha. |
| |
| 1. Changes to Bash |
| |
| a. A change was made to the help text for `{...}' to make it clear that a |
| semicolon is required before the closing brace. |
| |
| b. A fix was made to the `test' builtin so that syntax errors cause test |
| to return an exit status > 1. |
| |
| c. Globbing is no longer performed on assignment statements that appear as |
| arguments to `assignment builtins' such as `export'. |
| |
| d. System-specific configuration changes were made for: Rhapsody, |
| AIX 4.2/gcc, BSD/OS 4.0. |
| |
| e. New loadable builtins: ln, unlink. |
| |
| f. Some fixes were made to the globbing code to handle extended glob patterns |
| which immediately follow a `*'. |
| |
| g. A fix was made to the command printing code to ensure that redirections |
| following compound commands have a space separating them from the rest |
| of the command. |
| |
| h. The pathname canonicalization code was changed to produce fewer leading |
| `//' sequences, since those are interpreted as network file system |
| pathnames on some systems. |
| |
| i. A fix was made so that loops containing `eval' commands in commands passed |
| to `bash -c' would not exit prematurely. |
| |
| j. Some changes were made to the job reaping code when the shell is not |
| interactive, so the shell will retain exit statuses longer for examination |
| by `wait'. |
| |
| k. A fix was made so that `jobs | command' works again. |
| |
| l. The erroneous compound array assignment var=((...)) is now a syntax error. |
| |
| m. A change was made to the dynamic loading code in `enable' to support |
| Tenon's MachTen. |
| |
| n. A fix was made to the globbing code so that extended globbing patterns |
| will correctly match `.' in a bracket expression. |
| |
| 2. Changes to Readline |
| |
| a. A fix was made to the completion code in which a typo caused the wrong |
| value to be passed to the function that computed the longest common |
| prefix of the list of matches. |
| |
| b. The completion code now checks the value of rl_filename_completion_desired, |
| which is set by application-supplied completion functions to indicate |
| that filename completion is being performed, to decide whether or not to |
| call an application-supplied `ignore completions' function. |
| |
| 3. New Features in Bash |
| |
| a. A change was made to the startup file code so that any shell begun with |
| the `--login' option, even non-interactive shells, will source the login |
| shell startup files. |
| |
| 4. New Features in Readline |
| |
| a. A new variable, rl_erase_empty_line, which, if set by an application using |
| readline, will cause readline to erase, prompt and all, lines on which the |
| only thing typed was a newline. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.03-alpha, |
| and the previous version, bash-2.02.1-release. |
| |
| 1. Changes to Bash |
| |
| a. System-specific configuration changes were made for: Irix 6.x, Unixware 7. |
| |
| b. The texi2dvi and texi2html scripts were updated to the latest versions |
| from the net. |
| |
| c. The configure tests that determine which native type is 32 bits were |
| changed to not require a compiled program. |
| |
| d. Fixed a bug in shell_execve that could cause memory to be freed twice |
| after a failed exec. |
| |
| e. The `printf' test uses `diff -a' if it's available to prevent confusion |
| due to the non-ascii output. |
| |
| f. Shared object configuration is now performed by a shell script, |
| support/shobj-conf, which generates values to be substituted into |
| makefiles by configure. |
| |
| g. Some changes were made to `ulimit' to avoid the use of RLIM_INVALID as a |
| return value. |
| |
| h. Changes were made to `ulimit' to work around HPUX 9.x's peculiar |
| handling of RLIMIT_FILESIZE. |
| |
| i. Some new loadable builtins were added: id, printenv, sync, whoami, push, |
| mkdir. `pushd', `popd', and `dirs' can now be built as regular or |
| loadable builtins from the same source file. |
| |
| j. Changes were made to `printf' to handle NUL bytes in the expanded format |
| string. |
| |
| k. The various `make clean' Makefile targets now descend into lib/sh. |
| |
| l. The `type' builtin was changed to use the internal `getopt' so that things |
| like `type -ap' work as expected. |
| |
| m. There is a new configuration option, --with-installed-readline, to link |
| bash with a locally-installed version of readline. Only readline version |
| 4.0 and later releases can support this. Shared and static libraries |
| are supported. The installed include files are used. |
| |
| n. There is a new autoconf macro used to find which basic type is 64 bits. |
| |
| o. Dynamic linking and loadable builtins should now work on SCO 3.2v5*, |
| AIX 4.2 with gcc, Unixware 7, and many other systems using gcc, where |
| the `-shared' options works correctly. |
| |
| p. A bug was fixed in the bash filename completion code that caused memory to |
| be freed twice if a directory name containing an unset variable was |
| completed and the -u option was set. |
| |
| q. The prompt expansion code now quotes the `$' in the `\$' expansion so it |
| is not processed by subsequent parameter expansion. |
| |
| r. Fixed a parsing bug that caused a single or double quote after a `$$' to |
| trigger ANSI C expansion or locale translation. |
| |
| s. Fixed a bug in the globbing code that caused quoted filenames containing |
| no globbing characters to sometimes be incorrectly expanded. |
| |
| t. Changes to the default prompt strings if prompt string decoding is not |
| compiled into the shell. |
| |
| u. Added `do', `then', `else', `{', and `(' to the list of keywords that may |
| precede the `time' reserved word. |
| |
| v. The shell may now be cross-built for BeOS as well as cygwin32. |
| |
| w. The conditional command execution code now treats `=' the same as `==' |
| for deciding when to perform pattern matching. |
| |
| x. The `-e' option no longer causes the shell to exit if a command exits |
| with a non-zero status while running the startup files. |
| |
| y. The `printf' builtin no longer dumps core if a modifier is supplied in |
| the format string without a conversion character (e.g. `%h'). |
| |
| z. Array assignments of the form a=(...) no longer show up in the history |
| list. |
| |
| aa. The parser was fixed to obey the POSIX.2 rules for finding the closing |
| `}' in a ${...} expression. |
| |
| bb. The history file is now opened with mode 0600 rather than 0666, so bash |
| no longer relies on the user's umask being set appropriately. |
| |
| cc. Setting LANG no longer causes LC_ALL to be assigned a value; bash now |
| relies on proper behavior from the C library. |
| |
| dd. Minor changes were made to allow quoted variable expansions using |
| ${...} to be completed correctly if there is no closing `"'. |
| |
| ee. Changes were made to builtins/Makefile.in so that configuring the shell |
| with `--enable-profiling' works right and builtins/mkbuiltins is |
| generated. |
| |
| 2. Changes to Readline |
| |
| a. The version number is now 4.0. |
| |
| b. There is no longer any #ifdef SHELL code in the source files. |
| |
| c. Some changes were made to the key binding code to fix memory leaks and |
| better support Win32 systems. |
| |
| d. Fixed a silly typo in the paren matching code -- it's microseconds, not |
| milliseconds. |
| |
| e. The readline library should be compilable by C++ compilers. |
| |
| f. The readline.h public header file now includes function prototypes for |
| all readline functions, and some changes were made to fix errors in the |
| source files uncovered by the use of prototypes. |
| |
| g. The maximum numeric argument is now clamped at 1000000. |
| |
| h. Fixes to rl_yank_last_arg to make it behave better. |
| |
| i. Fixed a bug in the display code that caused core dumps if the prompt |
| string length exceeded 1024 characters. |
| |
| j. The menu completion code was fixed to properly insert a single completion |
| if there is only one match. |
| |
| k. A bug was fixed that caused the display code to improperly display tabs |
| after newlines. |
| |
| 3. New Features in Bash |
| |
| a. New `shopt' option, `restricted_shell', indicating whether or not the |
| shell was started in restricted mode, for use in startup files. |
| |
| b. Filename generation is now performed on the words between ( and ) in |
| array assignments (which it probably should have done all along). |
| |
| c. OLDPWD is now auto-exported, as POSIX.2 seems to require. |
| |
| d. ENV and BASH_ENV are read-only variables in a restricted shell. |
| |
| 4. New Features in Readline |
| |
| a. Many changes to the signal handling: |
| o Readline now catches SIGQUIT and cleans up the tty before returning; |
| o A new variable, rl_catch_signals, is available to application writers |
| to indicate to readline whether or not it should install its own |
| signal handlers for SIGINT, SIGTERM, SIGQUIT, SIGALRM, SIGTSTP, |
| SIGTTIN, and SIGTTOU; |
| o A new variable, rl_catch_sigwinch, is available to application |
| writers to indicate to readline whether or not it should install its |
| own signal handler for SIGWINCH, which will chain to the calling |
| applications's SIGWINCH handler, if one is installed; |
| o There is a new function, rl_free_line_state, for application signal |
| handlers to call to free up the state associated with the current |
| line after receiving a signal; |
| o There is a new function, rl_cleanup_after_signal, to clean up the |
| display and terminal state after receiving a signal; |
| o There is a new function, rl_reset_after_signal, to reinitialize the |
| terminal and display state after an application signal handler |
| returns and readline continues |
| |
| b. There is a new function, rl_resize_terminal, to reset readline's idea of |
| the screen size after a SIGWINCH. |
| |
| c. New public functions: rl_save_prompt and rl_restore_prompt. These were |
| previously private functions with a `_' prefix. |
| |
| d. New function hook: rl_pre_input_hook, called just before readline starts |
| reading input, after initialization. |
| |
| e. New function hook: rl_display_matches_hook, called when readline would |
| display the list of completion matches. The new function |
| rl_display_match_list is what readline uses internally, and is available |
| for use by application functions called via this hook. |
| |
| f. New bindable function, delete-char-or-list, like tcsh. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.02.1-release, |
| and the previous version, bash-2.02-release. |
| |
| 1. Changes to Bash |
| |
| a. A bug that caused the bash readline support to not compile unless aliases |
| and csh-style history were configured into the shell was fixed. |
| |
| b. Fixed a bug that could cause a core dump when here documents contained |
| more than 1000 characters. |
| |
| c. Fixed a bug that caused a CDPATH entry of "" to not be treated the same |
| as the current directory when in POSIX mode. |
| |
| d. Fixed an alignment problem with the memory returned by the bash malloc, |
| so returned memory is now 64-bit aligned. |
| |
| e. Fixed a bug that caused command substitutions executed within pipelines |
| to put the terminal in the wrong process group. |
| |
| f. Fixes to support/config.sub for: alphas, SCO Open Server and Open Desktop, |
| Unixware 2, and Unixware 7. |
| |
| g. Fixes to the pattern matching code to make it work correctly for eight-bit |
| characters. |
| |
| h. Fixed a problem that occasionally caused the shell to display the wrong |
| value for the new working directory when changing to a directory found |
| in $CDPATH when in physical mode. |
| |
| i. Fixed a bug that caused core dumps when using conditional commands in |
| shell functions. |
| |
| j. Fixed a bug that caused the printf builtin to loop forever if the format |
| string did not consume any of the arguments. |
| |
| k. Fixed a bug in the parameter expansion code that caused "$@" to be |
| incorrectly split if $IFS did not contain a space character. |
| |
| l. Fixed a bug that could cause a core dump when completing hostnames if |
| the number of matching hostnames was an exact multiple of 16. |
| |
| m. Fixed a bug that caused the shell to fork too early when a command |
| such as `%2 &' was given. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a problem with redisplay that showed up when the prompt string was |
| longer than the screen width and the prompt contained invisible characters. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.02-release, |
| and the previous version, bash-2.02-beta2. |
| |
| 1. Changes to Bash |
| |
| a. A bug was fixed that caused the terminal process group to be set |
| incorrectly when performing command substitution of builtins in a |
| pipeline. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.02-beta2, |
| and the previous version, bash-2.02-beta1. |
| |
| 1. Changes to Bash |
| |
| a. Attempting to `wait' for stopped jobs now generates a warning message. |
| |
| b. Pipelines which exit due to SIGPIPE in non-interactive shells are now |
| not reported if the shell is compiled -DDONT_REPORT_SIGPIPE. |
| |
| c. Some changes were made to builtins/psize.sh and support/bashbug.sh to |
| attempt to avoid some /tmp file races and surreptitious file |
| substitutions. |
| |
| d. Fixed a bug that caused the shell not to compile if configured with |
| dparen arithmetic but without aliases. |
| |
| e. Fixed a bug that caused the input stream to be switched when assigning |
| empty arrays with `bash -c'. |
| |
| f. A bug was fixed in the readline expansion glue code that caused bash to |
| dump core when expanding lines with an unclosed single quote. |
| |
| g. A fix was made to the `cd' builtin so that using a non-empty directory |
| from $CDPATH results in an absolute pathname of the new current working |
| directory to be displayed after the current directory is changed. |
| |
| h. Fixed a bug in the variable assignment code that caused the shell to |
| dump core when referencing an unset variable with `set -u' enabled in |
| an assignment statement preceding a command. |
| |
| i. Fixed a bug in the exit trap code that caused reserved words to not be |
| recognized under certain circumstances. |
| |
| j. Fixed a bug in the parameter pattern substitution code so that quote |
| removal is performed. |
| |
| k. The shell should now configure correctly on Apple Rhapsody systems. |
| |
| l. The `kill' builtin now prints a usage message if it is not passed any |
| arguments. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.02-beta1, |
| and the previous version, bash-2.02-alpha1. |
| |
| 1. Changes to Bash |
| |
| a. A few compilation bugs were fixed in the new extended globbing code. |
| |
| b. Executing arithmetic commands now sets the command name to `((' so |
| error messages look right. |
| |
| c. Fixed some build problems with various configuration options. |
| |
| d. The `printf' builtin now aborts immediately if an illegal format |
| character is encountered. |
| |
| e. The code that creates here-documents now behaves better if the file it's |
| trying to create already exists for some reason. |
| |
| f. Fixed a problem with the extended globbing code that made patterns like |
| `x+*' expand incorrectly. |
| |
| g. The prompt string expansion code no longer quotes tildes with backslashes. |
| |
| h. The bash getcwd() implementation in lib/sh/getcwd.c now behaves better in |
| the presence of lstat(2) failures. |
| |
| i. Fixed a bug with strsub() that caused core dumps when executing `fc -s'. |
| |
| j. The mail checking code now ensures that it has a valid default mailpath. |
| |
| k. A bug was fixed that caused local variables to be unset inappropriately |
| when sourcing a script from within another sourced script. |
| |
| l. A bug was fixed in the history saving code so that functions are saved |
| in the history list correctly if `cmdhist' is enabled, but `lithist' |
| is not. |
| |
| m. A bug was fixed that caused printf overflows when displaying error |
| messages. |
| |
| n. It should be easier to build the loadble builtins in examples/loadables, |
| though some manual editing of the generated Makefile is still required. |
| |
| o. The user's primary group is now always ${GROUPS[0]}. |
| |
| p. Some updates were made to support/config.guess from the GNU master copy. |
| |
| q. Some changes were made to the autoconf support for Solaris 2.6 large |
| files. |
| |
| r. The `command' builtins now does the right thing when confstr(3) cannot |
| find a value for _CS_PATH. |
| |
| s. Extended globbing expressions like `*.!(c)' are not history expanded if |
| `extglob' is enabled. |
| |
| t. Using the `-P' option to `cd' will force the value that is assigned to |
| PWD to not contain any symbolic links. |
| |
| 2. Changes to Readline |
| |
| a. The code that prints completion listings now behaves better if one or |
| more of the filenames contains non-printable characters. |
| |
| b. The time delay when showing matching parentheses is now 0.5 seconds. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.02-alpha1, |
| and the previous version, bash-2.01.1-release. |
| |
| 1. Changes to Bash |
| |
| a. OS-specific configuration changes for: BSD/OS 3.x, Minix 2.x, |
| Solaris 2.6, SINIX SVR4. |
| |
| b. Changes were made to the generated `info' files so that `install-info' |
| works correctly. |
| |
| c. PWD is now auto-exported. |
| |
| d. A fix was made to the pipeline code to make sure that the shell forks |
| to execute simple commands consisting solely of assignment statements. |
| |
| e. Changes to the test suite for systems with 14-character filenames. |
| |
| f. The default sizes of some internal hash tables have been made smaller |
| to reduce the shell's memory footprint. |
| |
| g. The `((...))' arithmetic command is now executed directly instead of |
| being translated into `let "..."'. |
| |
| h. Fixes were made to the expansion code so that "$*", "$@", "${array[@]}", |
| and "${array[@]}" expand correctly when IFS does not contain a space |
| character, is unset, or is set to NULL. |
| |
| i. The indirect expansion code (${!var}) was changed so that the only |
| valid values of `var' are variable names, positional parameters, `#', |
| `@', and `*'. |
| |
| j. An arithmetic expression error in a $((...)) expansion now causes a |
| non-interactive shell running in posix mode to exit. |
| |
| k. Compound array assignment now splits the words within the parentheses |
| on shell metacharacters like the parser would before expansing them |
| and performing the assignment. This is for compatibility with ksh-93. |
| |
| l. The internal shell backslash-quoting code (used in the output of `set' |
| and completion) now quotes tildes if they appear at the start of the |
| string or after a `=' or `:'. |
| |
| m. A couple of bugs with `shopt -o' were fixed. |
| |
| n. `bash +o' now displays the same output as `set +o' before starting an |
| interactive shell. |
| |
| o. A bug that caused command substitution and the `eval' builtin to |
| occasionally free memory twice when an error was encountered was fixed. |
| |
| p. The filename globbing code no longer requires read permission for a |
| directory when the filename to be matched does not contain any globbing |
| characters, as POSIX.2 specifies. |
| |
| q. A bug was fixed so that the job containing the last asynchronous |
| process is not removed from the job table until a `wait' is executed |
| for that process or another asynchronous process is started. This |
| satisfies a POSIX.2 requirement. |
| |
| r. A `select' bug was fixed so that a non-numeric user response is treated |
| the same as a numeric response that is out of range. |
| |
| s. The shell no longer parses the value of SHELLOPTS from the environment |
| if it is restricted, running setuid, or running in `privileged mode'. |
| |
| t. Fixes were made to enable large file support on systems such as |
| Solaris 2.6, where the size of a file may be larger than can be held |
| in an `int'. |
| |
| u. The filename hashing code was fixed to not add `./' to the beginning of |
| filenames which already begin with `./'. |
| |
| v. The configure script was changed so that the GNU termcap library is not |
| compiled in if `prefer-curses' has been specified. |
| |
| w. HISTCONTROL and HISTIGNORE are no longer applied to the second and |
| subsequent lines of a multi-line command. |
| |
| x. A fix was made to `disown' so that it does a better job of catching |
| out-of-range jobs. |
| |
| y. Non-interactive shells no longer report the status of processes terminated |
| due to SIGINT, even if the standard output is a terminal. |
| |
| z. A bug that caused the output of `jobs' to have extra carriage returns |
| was fixed. |
| |
| aa. A bug that caused PIPESTATUS to not be set when builtins or shell |
| functions were executed in the foreground was fixed. |
| |
| bb. Bash now attempts to detect when it is being run by sshd, and treats |
| that case identically to being run by rshd. |
| |
| cc. A bug that caused `set -a' to export SHELLOPTS when one of the shell |
| options was changed was fixed. |
| |
| dd. The `kill' builtin now disallows empty or missing process id arguments |
| instead of treating them as identical to `0', which means the current |
| process. |
| |
| ee. `var=value declare -x var' now behaves identically to |
| `var=value export var'. Similarly for `var=value declare -r var' and |
| `var=value readonly var'. |
| |
| ff. A few memory leaks were fixed. |
| |
| gg. `alias' and `unalias' now print error messages when passed an argument |
| that is not an alias for printing or deletion, even when the shell is |
| not interactive, as POSIX.2 specifies. |
| |
| hh. `alias' and `alias -p' now return a status of 0 when no aliases are |
| defined, as POSIX.2 specifes. |
| |
| ii. `cd -' now prints the pathname of the new working directory if the shell |
| is interactive. |
| |
| jj. A fix was made so that the code that binds $PWD now copes with getcwd() |
| returning NULL. |
| |
| kk. `unset' now checks whether or not a function name it's trying to unset |
| is a valid shell identifier only when the shell is running in posix mode. |
| |
| ll. A change was made to the code that generates filenames for here documents |
| to make them less prone to name collisions. |
| |
| mm. The parser was changed so that `time' is recognized as a reserved word |
| only at the beginning of a pipeline. |
| |
| nn. The pathname canonicalization code was changed so that `//' is converted |
| into `/', but all other pathnames beginning with `//' are left alone, as |
| POSIX.2 specifies. |
| |
| oo. The `logout' builtin will no longer exit a non-interactive non-login |
| shell. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a problem in the readline test program rltest.c that caused a core |
| dump. |
| |
| b. The code that handles parser directives in inputrc files now displays |
| more error messages. |
| |
| c. The history expansion code was fixed so that the appearance of the |
| history comment character at the beginning of a word inhibits history |
| expansion for that word and the rest of the input line. |
| |
| 3. New Features in Bash |
| |
| a. A new version of malloc, based on the older GNU malloc, that has many |
| changes, is more page-based, is more conservative with memory usage, |
| and does not `orphan' large blocks when they are freed. |
| |
| b. A new version of gmalloc, based on the old GLIBC malloc, with many |
| changes and range checking included by default. |
| |
| c. A new implementation of fnmatch(3) that includes full POSIX.2 Basic |
| Regular Expression matching, including character classes, collating |
| symbols, equivalence classes, and support for case-insensitive pattern |
| matching. |
| |
| d. ksh-88 egrep-style extended pattern matching ([@+*?!](patlist)) has been |
| implemented, controlled by a new `shopt' option, `extglob'. |
| |
| e. There is a new ksh-like `[[' compound command, which implements |
| extended `test' functionality. |
| |
| f. There is a new `printf' builtin, implemented according to the POSIX.2 |
| specification. |
| |
| g. There is a new feature for command substitution: $(< filename) now expands |
| to the contents of `filename', with any trailing newlines removed |
| (equivalent to $(cat filename)). |
| |
| h. There are new tilde prefixes which expand to directories from the |
| directory stack. |
| |
| i. There is a new `**' arithmetic operator to do exponentiation. |
| |
| j. There are new configuration options to control how bash is linked: |
| `--enable-profiling', to allow bash to be profiled with gprof, and |
| `--enable-static-link', to allow bash to be linked statically. |
| |
| k. There is a new configuration option, `--enable-cond-command', which |
| controls whether or not the `[[' command is included. It is on by |
| default. |
| |
| l. There is a new configuration option, `--enable-extended-glob', which |
| controls whether or not the ksh extended globbing feature is included. |
| It is enabled by default. |
| |
| m. There is a new configuration #define in config.h.top that, when enabled, |
| will cause all login shells to source /etc/profile and one of the user- |
| specific login shell startup files, whether or not the shell is |
| interactive. |
| |
| n. There is a new invocation option, `--dump-po-strings', to dump |
| a shell script's translatable strings ($"...") in GNU `po' format. |
| |
| o. There is a new `shopt' option, `nocaseglob', to enable case-insensitive |
| pattern matching when globbing filenames and using the `case' construct. |
| |
| p. There is a new `shopt' option, `huponexit', which, when enabled, causes |
| the shell to send SIGHUP to all jobs when an interactive login shell |
| exits. |
| |
| q. `bind' has a new `-u' option, which takes a readline function name as an |
| argument and unbinds all key sequences bound to that function in a |
| specified keymap. |
| |
| r. `disown' now has `-a' and `-r' options, to limit operation to all jobs |
| and running jobs, respectively. |
| |
| s. The `shopt' `-p' option now causes output to be displayed in a reusable |
| format. |
| |
| t. `test' has a new `-N' option, which returns true if the filename argument |
| has been modified since it was last accessed. |
| |
| u. `umask' now has a `-p' option to print output in a reusable format. |
| |
| v. A new escape sequence, `\xNNN', has been added to the `echo -e' and $'...' |
| translation code. It expands to the character whose ascii code is NNN |
| in hexadecimal. |
| |
| w. The prompt string expansion code has a new `\r' escape sequence. |
| |
| x. The shell may now be cross-compiled for the CYGWIN32 environment on |
| a Unix machine. |
| |
| 4. New Features in Readline |
| |
| a. There is now an option for `iterative' yank-last-arg handline, so a user |
| can keep entering `M-.', yanking the last argument of successive history |
| lines. |
| |
| b. New variable, `print-completions-horizontally', which causes completion |
| matches to be displayed across the screen (like `ls -x') rather than up |
| and down the screen (like `ls'). |
| |
| c. New variable, `completion-ignore-case', which causes filename completion |
| and matching to be performed case-insensitively. |
| |
| d. There is a new bindable command, `magic-space', which causes history |
| expansion to be performed on the current readline buffer and a space to |
| be inserted into the result. |
| |
| e. There is a new bindable command, `menu-complete', which enables tcsh-like |
| menu completion (successive executions of menu-complete insert a single |
| completion match, cycling through the list of possible completions). |
| |
| f. There is a new bindable command, `paste-from-clipboard', for use on Win32 |
| systems, to insert the text from the Win32 clipboard into the editing |
| buffer. |
| |
| g. The key sequence translation code now understands printf-style backslash |
| escape sequences, including \NNN octal escapes. These escape sequences |
| may be used in key sequence definitions or macro values. |
| |
| h. An `$include' inputrc file parser directive has been added. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.01.1-release, |
| and the previous version, bash-2.01-release. |
| |
| 1. Changes to Bash |
| |
| a. The select command was fixed to check the validity of the user's |
| input more strenuously. |
| |
| b. A bug was fixed that prevented `time' from timing commands correctly |
| when supplied as an argument to `bash -c'. |
| |
| c. A fix was made to the mail checking code to keep from adding the same |
| mail file to the list of files to check multiple times when parsing |
| $MAILPATH. |
| |
| d. Fixed an off-by-one error in the tilde expansion library. |
| |
| e. When using the compound array assignment syntax, the old value of |
| the array is cleared before assigning the new value. |
| |
| f. Fixed a bug that could cause a core dump when a trap handler was reset |
| to the default in the trap command associated with that signal. |
| |
| g. Fixed a bug in the locale code that occurred when assigning a value |
| to LC_ALL. |
| |
| h. A change was made to the parser so that words of the form xxx=(...) |
| are not considered compound assignment statements unless there are |
| characters before the `='. |
| |
| i. A fix was made to the command tracing code to correctly quote each |
| word of output. |
| |
| j. Some changes were made to the bash-specific autoconf tests to make them |
| more portable. |
| |
| k. Completion of words with globbing characters now correctly quotes the |
| result. |
| |
| l. The directory /var/spool/mail is now preferred to /usr/spool/mail when |
| configure is deciding on the default mail directory. |
| |
| m. The brace completion code was fixed to not quote the `{' and `}'. |
| |
| n. Some fixes were made to make $RANDOM more random in subshells. |
| |
| o. System-specific changes were made to configure for: SVR4.2 |
| |
| p. Changes were made so that completion of words containing globbing chars |
| substitutes the result only if a single filename was matched. |
| |
| q. The window size is now recomputed after a job is stopped with SIGTSTP if |
| the user has set `checkwinsize' with `shopt'. |
| |
| r. When doing substring expansion, out-of-range substring specifiers now |
| cause nothing to be substituted rather than an expansion error. |
| |
| s. A fix was made so that you can no longer trap `SIGEXIT' or `SIGDEBUG' -- |
| only `EXIT' and `DEBUG' are accepted. |
| |
| t. The display of trapped signals now uses the signal number if signals |
| for which bash does not know the name are trapped. |
| |
| u. A fix was made so that `bash -r' does not turn on restricted mode until |
| after the startup files are executed. |
| |
| v. A bug was fixed that occasionally caused a core dump when a variable |
| found in the temporary environment of export/declare/readonly had a |
| null value. |
| |
| w. A bug that occasionally caused unallocated memory to be passed to free() |
| when doing arithmetic substitution was fixed. |
| |
| x. A bug that caused a buffer overrun when expanding a prompt string |
| containing `\w' and ${#PWD} exceeded PATH_MAX was fixed. |
| |
| y. A problem with the completion code that occasionally caused it to |
| refer to a character before the beginning of the readline line buffer |
| was fixed. |
| |
| z. A bug was fixed so that the `read' builtin restarts reads when |
| interrupted by signals other than SIGINT. |
| |
| aa. Fixed a bug that caused a command to be freed twice when there was |
| an evaluation error in the `eval' command. |
| |
| 2. Changes to Readline |
| |
| a. Added a missing `extern' to a declaration in readline.h that kept |
| readline from compiling cleanly on some systems. |
| |
| b. The history file is now opened with mode 0600 when it is written for |
| better security. |
| |
| c. Changes were made to the SIGWINCH handling code so that prompt redisplay |
| is done better. |
| |
| d. ^G now interrupts incremental searches correctly. |
| |
| e. A bug that caused a core dump when the set of characters to be quoted |
| when completing words was empty was fixed. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.01-release, |
| and the previous version, bash-2.01-beta2. |
| |
| 1. Changes to Bash |
| |
| a. The `distclean' target should remove the `printenv' executable if it |
| has been created. |
| |
| b. The test suite was changed slightly to ensure that the error messages |
| are printed in English. |
| |
| c. A bug that caused the shell to dump core when a filename containing a |
| `/' was passed to `hash' was fixed. |
| |
| d. Pathname canonicalization now leaves a leading `//' intact, as POSIX.1 |
| requires. |
| |
| e. A memory leak when completing commands was fixed. |
| |
| f. A memory leak that occurred when checking the hash table for commands |
| with relative paths was fixed. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.01-beta2, |
| and the previous version, bash-2.01-beta1. |
| |
| 1. Changes to Bash |
| |
| a. The `ulimit' builtin translates RLIM_INFINITY to the hard limit only if |
| the current (soft) limit is less than or equal to the hard limit. |
| |
| b. Fixed a bug that caused the bash emulation of strcasecmp to produce |
| incorrect results. |
| |
| c. A bug that caused memory to be freed twice when a trap handler resets |
| the trap more than once was fixed. |
| |
| d. A bug that caused machines where sizeof (pointer) > sizeof (int) to |
| fail (and possibly dump core) when trying to unwind-protect a null |
| pointer was fixed. |
| |
| e. The startup files should not be run with job control enabled. This fix |
| allows SIGINT to once again interrupt startup file execution. |
| |
| f. Bash should not change the SIGPROF handler if it is set to something |
| other than SIG_DFL. |
| |
| g. The completion code that provides bash-specific completions for readline |
| now quotes characters that the readline code would treat as word break |
| characters if they appear in a file name. |
| |
| h. The completion code now correctly quotes filenames containing a `!', |
| even if the user attempted to use double quotes when attempting |
| completion. |
| |
| i. A bug that caused the shell to dump core when `disown' was called without |
| arguments and there was no current job was fixed. |
| |
| j. A construct like $((foo);bar) is now processed as a command substitution |
| rather than as a bad arithmetic substitution. |
| |
| k. A couple of bugs that caused `fc' to not obey the `cmdhist' and `lithist' |
| shell options when editing and re-executing a series of commands were |
| fixed. |
| |
| l. A fix was made to the grammar -- the list of commands between `do' and |
| `done' in the body of a `for' command should be treated the same as a |
| while loop. |
| |
| 2. Changes to Readline |
| |
| a. A couple of bugs that caused the history search functions to attempt to |
| free a NULL pointer were fixed. |
| |
| b. If the C library provides setlocale(3), readline does not need to look |
| at various environment variables to decide whether or not to go into |
| eight-bit mode automatically -- just check whether the current locale |
| is not `C' or `POSIX'. |
| |
| c. If the filename completion function finds that a directory was not closed |
| by a previous (interrupted) completion, it closes the directory with |
| closedir(). |
| |
| 3. New Features in Bash |
| |
| a. New bindable readline commands: history-and-alias-expand-line and |
| alias-expand-line. The code was always in there, there was just no |
| way to execute it. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.01-beta1, |
| and the previous version, bash-2.01-alpha1. |
| |
| 1. Changes to Bash |
| |
| a. Fixed a problem that could cause file descriptors used for process |
| substitution to conflict with those used explicitly in redirections. |
| |
| b. Made it easier to regenerate configure if the user changes configure.in. |
| |
| c. ${GROUPS[0]} should always be the primary group, even on systems without |
| multiple groups. |
| |
| d. Spelling correction is no longer enabled by default. |
| |
| e. Fixes to quoting problems in `bashbug'. |
| |
| f. OS-specific configuration changes were made for: Irix 6. |
| |
| g. OS-specific code changes were made for: QNX. |
| |
| h. A more meaningful message is now printed when the file in /tmp for a |
| here document cannot be created. |
| |
| i. Many changes to the shell's variable initialization code to speed |
| non-interactive startup. |
| |
| j. Changes to the non-job-control code so that it does not try to open |
| /dev/tty. |
| |
| k. The output of `set' and `export' is once again sorted, as POSIX wants. |
| |
| l. Fixed a problem caused by a recursive call reparsing the value of |
| $SHELLOPTS. |
| |
| m. The tilde code no longer calls getenv() when it's compiled as part of |
| the shell, which should eliminate problems on systems that cannot |
| redefine getenv(), like the NeXT OS. |
| |
| n. Fixed a problem that caused `bash -o' or `bash +o' to not list all |
| the shell options. |
| |
| o. Fixed `ulimit' to convert RLIM_INFINITY to the appropriate hard limit |
| only if the hard limit is greater than the current (soft) limit. |
| |
| p. Fixed a problem that arose when building bash in a different directory |
| than the source and y.tab.[ch] were remade with something other than |
| bison. This came up most often on NetBSD. |
| |
| q. Fixed a problem with completion -- it thought that `pwd`/[TAB] indicated |
| an unfinished command completion (`/), which generated errors. |
| |
| r. The bash special tilde expansions (~-, ~+) are now attempted before |
| calling the standard tilde expansion code, which should eliminate the |
| problems people have been seeing with this on Solaris 2.5.1. |
| |
| s. Added support for <stdarg.h> to places where it was missing. |
| |
| t. Changed the code that reads the output of a command substitution to not |
| go through stdio. This reduces the memory requirements and is faster. |
| |
| u. A number of changes to speed up export environment creation were made. |
| |
| v. A number of memory leaks were fixed as the result of running the test |
| scripts through Purify. |
| |
| w. Fixed a bug that caused subshells forked to interpret executable |
| scripts without a leading `#!' to not reinitialize the values of |
| the shell options. |
| |
| 2. Changes to Readline |
| |
| a. History library has less `#ifdef SHELL' code -- abstracted stuff out |
| into application-specific function hooks. |
| |
| b. Readline no longer calls getenv() if it's compiled as part of the shell, |
| which should eliminate problems on systems that cannot redefine getenv(), |
| like the NeXT OS. |
| |
| c. Fixed translation of ESC when `untranslating' macro values. |
| |
| d. The region kill operation now fixes the mark if it ends up beyond the |
| boundaries of the line after the region is deleted. |
| |
| 3. New Features in Bash |
| |
| a. New argument for `configure': `--with-curses'. This can be used to |
| override the selection of the termcap library on systems where it is |
| deficient. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.01-alpha1, |
| and the previous version, bash-2.0-release. |
| |
| 1. Changes to Bash |
| |
| a. System-specific configuration changes for: FreeBSD, SunOS4, Irix, |
| MachTen, QNX 4.2, Harris Night Hawk, SunOS5. |
| |
| b. System-specific code changes were made for: Linux, 4.4 BSD, QNX 4.2, |
| HP-UX, AIX 4.2. |
| |
| c. A bug that caused the exec builtin to fail because the full pathname of |
| the command could not be found was fixed. |
| |
| d. The code that performs output redirections is now more resistant to |
| race conditions and possible security exploits. |
| |
| e. A bug that caused the shell to dump core when performing pattern |
| substitutions on variable values was fixed. |
| |
| f. More hosts are now recognized by the auto-configuration mechanism |
| (OpenBSD, QNX, others). |
| |
| g. Assignments to read-only variables that attempt to convert them to |
| arrays are now errors. |
| |
| h. A bug that caused shell scripts using array assignments in POSIX mode |
| to exit after the assignment was performed was fixed. |
| |
| i. The substring expansion code is now more careful about running off the |
| ends of the expanded variable value. |
| |
| j. A bug that caused completion to fail if a backquoted command substitution |
| appeared anywhere on the line was fixed. |
| |
| k. The `source' builtin no longer turns off history if it has been enabled |
| in a non-interactive shell. |
| |
| l. A bug that caused the shell to crash when `disown' was given a pid |
| instead of a job number was fixed. |
| |
| m. The `cd' spelling correction code will not try to change to `.' if no |
| directory entries match a single-character argument. |
| |
| n. A bad variable name supplied to `declare', `export', or `readonly' no |
| longer causes a non-interactive shell in POSIX mode to exit. |
| |
| o. Some fixes were made to the test suite to handle peculiarities of |
| various Unix versions. |
| |
| p. The bash completion code now quotes characters that readline would |
| treat as word breaks for completion but are not shell metacharacters. |
| |
| q. Bad options supplied at invocation now cause a usage message to be |
| displayed. |
| |
| r. Fixes were made to the code that handles DEBUG traps so that the trap |
| string is not freed inappropriately. |
| |
| s. Some changes were made to the bash debugger in examples/bashdb -- it |
| should be closer to working now. |
| |
| t. A problem that caused the default filename used for mail checking to be |
| wrong was fixed. |
| |
| u. A fix was made to the `echo' builtin so that NUL characters printed with |
| `echo -e' do not cause the output to be truncated. |
| |
| v. A fix was made to the job control code so that the shell behaves better |
| when monitor mode is enabled in a non-interactive shell. |
| |
| w. Bash no longer catches all of the terminating signals in a non- |
| interactive shell until a trap is set on EXIT, which should result in |
| quicker startup. |
| |
| x. A fix was made to the command timing code so that `time' can be used in |
| a loop. |
| |
| y. A fix was made to the parser so that `((cmd); cmd2)' is now parsed as |
| a nested subshell rather than strictly as an (erroneous) arithmetic |
| command. |
| |
| z. A fix was made to the globbing code so that it correctly matches quoted |
| filenames beginning with a `.'. |
| |
| aa. A bug in `fc' that caused some multi-line commands to not be stored as |
| one command in the history when they were re-executed after editing |
| (with `fc -e') was fixed. |
| |
| bb. The `ulimit' builtin now attempts to catch some classes of integer |
| overflows. |
| |
| cc. The command-oriented-history code no longer attempts to add `;' |
| inappropriately when a newline appears while reading a $(...) command |
| substitution. |
| |
| dd. A bug that caused the shell to dump core when `help --' was executed |
| was fixed. |
| |
| ee. A bug that caused the shell to crash when an unset variable appeared |
| in the body of a here document after `set -u' had been executed was |
| fixed. |
| |
| ff. Implicit input redirections from /dev/null for asynchronous commands |
| are now handled better. |
| |
| gg. A bug that caused the shell to fail to compile when configured with |
| `--disable-readline' was fixed. |
| |
| hh. The globbing code should now be interruptible. |
| |
| ii. Bash now notices when the `kill' builtin is used to send SIGCONT to a |
| stopped job and adjusts the data structures accordingly, as if `bg' had |
| been executed instead. |
| |
| jj. A bug that caused the shell to crash when mixing calls to `getopts' |
| and `shift' on the same set of positional parameters was fixed. |
| |
| kk. The command printing code now preserves the `-p' flag to `time'. |
| |
| ll. The command printing code now handles here documents better when there |
| are other redirections associated with the command. |
| |
| mm. The special glibc environment variable (NNN_GNU_nonoption_argv_flags_) |
| is no longer placed into the environment of executed commands -- users |
| of glibc had too many problems with it. |
| |
| nn. Reorganized the code that generates signames.h. The signal_names list |
| is now more complete but may be slightly different (SIGABRT is favored |
| over SIGIOT, for example). The preferred signal names are those |
| listed in the POSIX.2 standard. |
| |
| oo. `bashbug' now uses a filename shorter than 14 characters for its |
| temporary file, and asks for confirmation before sending the bug |
| report. |
| |
| pp. A bug that caused TAB completion in vi editing mode to not be turned |
| off when `set -o posix' was executed or back on when `set +o posix' |
| was executed was fixed. |
| |
| qq. A bug in the brace expansion code that caused brace expansions appearing |
| in new-style $(...) command substitutions to be inappropriately expanded |
| was fixed. |
| |
| rr. A bug in the readline hook shell-expand-line that could cause memory to |
| be inappropriately freed was fixed. |
| |
| ss. A bug that caused some arithmetic expressions containing `&&' and `||' |
| to be parsed with the wrong precedence has been fixed. |
| |
| tt. References to unbound variables after `set -u' has been executed now |
| cause the shell to exit immediately, as they should. |
| |
| uu. A bug that caused the shell to exit inappropriately when `set -e' had |
| been executed and a command's return status was being inverted with the |
| `!' reserved word was fixed. |
| |
| vv. A bug that could occasionally cause the shell to crash with a |
| divide-by-zero error when timing a command was fixed. |
| |
| ww. A bug that caused parameter pattern substitution to leave stray |
| backslashes in the replacement string when the expression is in |
| double quotes was fixed. |
| |
| xx. The `break' and `continue' builtins now break out of all loops when an |
| invalid count argument is supplied. |
| |
| yy. Fixed a bug that caused PATH to be set to the empty string if |
| `command -p' is executed with PATH unset. |
| |
| zz. Fixed `kill -l signum' to print the signal name without the `SIG' prefix, |
| as POSIX specifies. |
| |
| aaa. Fixed a bug that caused the shell to crash while setting $SHELLOPTS |
| if there were no shell options set. |
| |
| bbb. Fixed `export -p' and `readonly -p' so that when the shell is in POSIX |
| mode, their output is as POSIX.2 specifies. |
| |
| ccc. Fixed a bug in `readonly' so that `readonly -a avar=(...)' actually |
| creates an array variable. |
| |
| ddd. Fixed a bug that prevented `time' from correctly timing background |
| pipelines. |
| |
| 2. Changes to Readline |
| |
| a. A bug that caused an extra newline to be printed when the cursor was on |
| an otherwise empty line was fixed. |
| |
| b. An instance of memory being used after it was freed was corrected. |
| |
| c. The redisplay code now works when the prompt is longer than the screen |
| width. |
| |
| d. `dump-macros' is now a bindable name, as it should have been all along. |
| |
| e. Non-printable characters are now expanded when displaying macros and |
| their values. |
| |
| f. The `dump-variables' and `dump-macros' commands now output a leading |
| newline if they're called as the result of a key sequence, rather |
| than directly by an application. |
| |
| 3. New Features in Bash |
| |
| a. There is a new builtin array variable: GROUPS, the set of groups to which |
| the user belongs. This is used by the test suite. |
| |
| 4. New Features in Readline |
| |
| a. If a key sequence bound to `universal-argument' is read while reading a |
| numeric argument started with `universal-argument', it terminates the |
| argument but is otherwise ignored. This provides a way to insert multiple |
| instances of a digit string, and is how GNU emacs does it. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.0-release, |
| and the previous version, bash-2.0-beta3. |
| |
| 1. Changes to Bash |
| |
| a. Fix to the `getopts' builtin so that it does the right thing when a |
| required option argument is not present. |
| |
| b. The completion code now updates the common prefix of matched names |
| after FIGNORE processing is done, since any names that were removed |
| may have changed the common prefix. |
| |
| c. Fixed a bug that made messages in MAILPATH entries not work correctly. |
| |
| d. Fixed a serious documentation error in the description of the new |
| ${parameter:offset[:length]} expansion. |
| |
| e. Fixes to make parameter substring expansion ({$param:offset[:length]}) |
| work when within double quotes. |
| |
| f. Fixes to make ^A (CTLESC) survive an unquoted expansion of positional |
| parameters. |
| |
| g. Corrected a misspelling of `unlimited' in the output of `ulimit'. |
| |
| h. Fixed a bug that caused executable scripts without a leading `#!' to |
| occasionally pick up the wrong set of positional parameters. |
| |
| i. Linux systems now have a working `ulimit -v', using RLIMIT_AS. |
| |
| j. Updated config.guess so that many more machine types are recognized. |
| |
| k. Fixed a bug with backslash-quoted slashes in the ${param/pat[/sub]} |
| expansion. |
| |
| l. If the shell is named `-su', and `-c command' is supplied, read and |
| execute the login shell startup files even though the shell is not |
| interactive. This is to support the `-' option to `su'. |
| |
| m. Fixed a bug that caused core dumps when the DEBUG trap was ignored |
| with `trap "" DEBUG' and a shell function was subsequently executed. |
| |
| n. Fixed a bug that caused core dumps in the read builtin when IFS was |
| set to the null string and the input had leading whitespace. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a bug that caused a numeric argument of 1024 to be ignored when |
| inserting text. |
| |
| b. Fixed the display code so that the numeric argument is displayed as it's |
| being entered. |
| |
| c. Fixed the numeric argument reading code so that `M-- command' is |
| equivalent to `M--1 command', as the prompt implies. |
| |
| 3. New Features in Bash |
| |
| a. `ulimit' now sets both hard and soft limits and reports the soft limit |
| by default (when neither -H nor -S is specified). This is compatible |
| with versions of sh and ksh that implement `ulimit'. |
| |
| b. Integer constants have been extended to base 64. |
| |
| 4. New Features in Readline |
| |
| a. The `home' and `end' keys are now bound to beginning-of-line and |
| end-of-line, respectively, if the corresponding termcap capabilities |
| are present. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.0-beta3, |
| and the previous version, bash-2.0-beta2. |
| |
| 1. Changes to Bash |
| |
| a. System-specific changes for: AIX 4.2, SCO 3.2v[45], HP-UX. |
| |
| b. When in POSIX mode, variable assignments preceding a special builtin |
| persist in the shell environment after the builtin completes. |
| |
| c. Changed all calls to getwd() to getcwd(). Improved check for systems |
| where the libc getcwd() calls popen(), since that breaks on some |
| systems when job control is being used. |
| |
| d. Fixed a bug that caused seg faults when executing scripts with the |
| execute bit set but without a leading `#!'. |
| |
| e. The environment passed to executed commands is never sorted. |
| |
| f. A bug was fixed in the code that expands ${name[@]} to the number of |
| elements in an array variable. |
| |
| g. A bug was fixed in the array compound assignment code ( A=( ... ) ). |
| |
| h. Window size changes now correctly propagate down to readline if |
| the shopt `checkwinsize' option is enabled. |
| |
| i. A fix was made in the code that expands to the length of a variable |
| value (${#var}). |
| |
| j. A fix was made to the command builtin so that it did not turn on the |
| `no fork' flag inappropriately. |
| |
| k. A fix was made to make `set -n' work more reliably. |
| |
| l. A fix was made to the job control initialization code so that the |
| terminal process group is set to the shell's process group if the |
| shell changes its own process group. |
| |
| 2. Changes to Readline |
| |
| a. System-specific changes for: SCO 3.2v[45]. |
| |
| b. The behavior of the vi-mode `.' when redoing an `i' command was changed |
| to insert the text previously inserted by the `i' command rather than |
| simply entering insert mode. |
| |
| 3. New features in Bash |
| |
| a. There is a new version of the autoload function package, in |
| examples/functions/autoload.v2, that uses arrays and provides more |
| functionality. |
| |
| b. Support for LC_COLLATE and locale-specific sorting of the results of |
| pathname expansion if strcoll() is available. |
| |
| 4. New Features in Readline |
| |
| a. Support for locale-specific sorting of completion possibilities if |
| strcoll() is available. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.0-beta2, |
| and the previous version, bash-2.0-beta1. |
| |
| 1. Changes to Bash |
| |
| a. `pushd -' is once again equivalent to `pushd $OLDPWD'. |
| |
| b. OS-specific changes for: SCO 3.2v[45]. |
| |
| c. A change was made to the fix for the recently-reported security hole |
| when reading characters with octal value 255 to make it work better on |
| systems with restartable system calls when not using readline. |
| |
| d. Some changes were made to the test suite so that it works if you |
| configure bash with --enable-usg-echo-default. |
| |
| e. A fix was made to the parsing of conditional arithmetic expressions. |
| |
| f. Illegal arithmetic bases now cause an arithmetic evaluation error rather |
| than being silently reset. |
| |
| g. Multiple arithmetic bases now cause an arithmetic evaluation error |
| instead of being ignored. |
| |
| h. A fix was made to the evaluation of ${param?word} to conform to POSIX.2. |
| |
| i. A bug that sometimes caused array indices to be evaluated twice (which |
| would cause errors when they contained assignment statements) was fixed. |
| |
| j. `ulimit' was rewritten to avoid problems with getrlimit(2) returning |
| unsigned values and to simplify the code. |
| |
| k. A bug in the command-oriented-history code that caused it to sometimes |
| put semicolons after right parens inappropriately was fixed. |
| |
| l. The values inserted into the prompt by the \w and \W escape sequences |
| are now quoted to prevent further expansion. |
| |
| m. An interactive shell invoked as `sh' now reads and executes commands |
| from the file named by $ENV when it starts up. If it's a login shell, |
| it does this after reading /etc/profile and ~/.profile. |
| |
| n. The file named by $ENV is never read by non-interactive shells. |
| |
| 2. Changes to Readline |
| |
| a. A few changes were made to hide some macros and functions that should not |
| be public. |
| |
| b. An off-by-one error that caused seg faults in the history expansion code |
| was fixed. |
| |
| 3. New Features in Bash |
| |
| a. The ksh-style ((...)) arithmetic command was implemented. It is exactly |
| identical to let "...". This is controlled by a new option to configure, |
| `--enable-dparen-arithmetic', which is on by default. |
| |
| b. There is a new #define available in config.h.top: SYS_BASH_LOGOUT. If |
| defined to a filename, bash reads and executes commands from that file |
| when a login shell exits. It's commented out by default. |
| |
| c. `ulimit' has a `-l' option that reports the maximum amount of data that |
| may be locked into memory on 4.4BSD-based systems. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.0-beta1, |
| and the previous version, bash-2.0-alpha4. |
| |
| 1. Changes to Bash |
| |
| a. A bug that sometimes caused traps to be ignored on signals the |
| shell treats specially was fixed. |
| |
| b. The internationalization code was changed to track the values of |
| LC_* variables and call setlocale() as appropriate. The TEXTDOMAIN |
| and TEXTDOMAINDIR variables are also tracked; changes cause calls |
| to textdomain() and bindtextdomain(), if available. |
| |
| c. A bug was fixed that sometimes caused double-quoted strings to be |
| parsed incorrectly. |
| |
| d. Changes were made so that the siglist code compiles correctly on |
| Solaris 2.5. |
| |
| e. Added `:' to the set of characters that cause word breaks for the |
| completion code so that pathnames in assignments to $PATH can be |
| completed. |
| |
| f. The `select' command was fixed to print $PS3 to stderr. |
| |
| g. Fixed an error in the manual page section describing the effect that |
| setting and unsetting GLOBIGNORE has on the setting of the `dotglob' |
| option. |
| |
| h. The time conversion code now uses CLK_TCK rather than CLOCKS_PER_SEC |
| on systems without gettimeofday() and resources. |
| |
| i. The getopt static variables are now initialized each time a subshell |
| is started, so subshells using `getopts' work right. |
| |
| j. A sign-extension bug that caused a possible security hole was fixed. |
| |
| k. The parser now reads characters between backquotes within a double- |
| quoted string as a single word, so double quotes in the backquoted |
| string don't terminate the enclosing double-quoted string. |
| |
| l. A bug that caused `^O' to work incorrectly when typed as the first |
| thing to an interactive shell was fixed. |
| |
| m. A rarely-exercised off-by-one error in the code that quotes variable |
| values was fixed. |
| |
| n. Some memory and file descriptor leaks encountered when running a |
| shell script that is executable but does not have a leading `#!' |
| were plugged. |
| |
| 2. Changes to Readline |
| |
| a. A bug that sometimes caused incorrect results when trying to read |
| typeahead on systems without FIONREAD was fixed. |
| |
| 3. New Features in Bash |
| |
| a. The command timing code now uses the value of the TIMEFORMAT variable |
| to format and display timing statistics. |
| |
| b. The `time' reserved word now accepts a `-p' option to force the |
| POSIX.2 output format. |
| |
| c. There are a couple of new and updated scripts to convert csh startup |
| files to bash format. |
| |
| d. There is a new builtin array variable: BASH_VERSINFO. The various |
| members hold the parts of the version information in BASH_VERSION, |
| plus the value of MACHTYPE. |
| |
| 4. New Features in Readline |
| |
| a. Setting LANG to `en_US.ISO8859-1' now causes readline to enter |
| eight-bit mode. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.0-alpha4, |
| and the previous version, bash-2.0-alpha3. |
| |
| 1. Changes to Bash |
| |
| a. There is better detection of rsh connections on Solaris 2. |
| |
| b. Assignments to read-only variables preceding a command name are now |
| variable assignment errors. Variable assignment errors cause |
| non-interactive shells running in posix mode to exit. |
| |
| c. The word tokenizer was rewritten to handle nested quotes and pairs |
| ('', "", ``, ${...}, $(...), $[...], $'...', $"...", <(...), >(...)) |
| correctly. Some of the parameter expansion code was updated as a |
| consequence. |
| |
| d. A fix was made to `test' when given three arguments so that a binary |
| operator is checked for first, before checking that the first argument |
| is `!'. |
| |
| e. 2''>/dev/null is no longer equivalent to 2>/dev/null. |
| |
| f. Parser error messages were regularized, and in most cases the name of |
| the shell script being read by a non-interactive shell is not printed |
| twice. |
| |
| g. A fix was made to the completion code so that it no longer removes the |
| text the user typed in some cases. |
| |
| h. The special glibc `getopt' environment variable is no longer put into |
| the environment on machines with small values of ARG_MAX. |
| |
| i. The expansion of ${...} now follows the POSIX.2 rules for finding the |
| closing `}'. |
| |
| j. The shell no longer displays spurious status messages for background |
| jobs in shell scripts that complete successfully when the script is |
| run from a terminal. |
| |
| k. `shopt -o' now correctly updates $SHELLOPTS. |
| |
| l. A bug that caused the $PATH searching code to return a non-executable |
| file even when an executable file with the same name appeared later in |
| $PATH was fixed. |
| |
| m. The shell now does tilde expansions on unquoted `:~' in assignment |
| statements when not in posix mode. |
| |
| n. Variable assignment errors when a command consists only of assignments |
| now cause non-interactive shells to exit when in posix mode. |
| |
| o. If the variable in a `for' or `select' command is read-only, or not a |
| legal shell identifier, a variable assignment error occurs. |
| |
| p. `test' now handles `-a' and `-o' as binary operators when three arguments |
| are supplied, and correctly parses `( word )' as equivalent to `word'. |
| |
| q. `test' was fixed so that file names of the form /dev/fd/NN mean the same |
| thing on all systems, even Linux. |
| |
| r. Fixed a bug in the globbing code that caused patterns with multiple |
| consecutive `*'s to not be matched correctly. |
| |
| s. Fixed a bug that caused $PS2 to not be printed when an interactive shell |
| not using readline is reading a here document. |
| |
| t. Fixed a bug that caused history expansion to be performed inappropriately |
| when a single-quoted string spanned more than one line. |
| |
| u. `getopts' now checks that the variable name passed by the user as the |
| second argument is a legal shell identifier and that the variable is |
| not read-only. |
| |
| v. Fixed `getopts' to obey POSIX.2 rules for setting $OPTIND when it |
| encounters an error. |
| |
| w. Fixed `set' to display variable values in a form that can be re-read. |
| |
| x. Fixed a bug in the code that keeps track of whether or not local variables |
| have been declared at the current level of function nesting. |
| |
| y. Non-interactive shells in posix mode now exit if the name in a function |
| declaration is not a legal identifier. |
| |
| z. The job control code now ignores stopped children when the shell is not |
| interactive. |
| |
| aa. The `cd' builtin no longer attempts spelling correction on the directory |
| name if the shell is not interactive, regardless of the setting of the |
| `cdspell' option. |
| |
| bb. Some OS-specific changes were made for SCO 3.2v[45] and AIX 4.2. |
| |
| cc. `time' now prints its output to stderr, as POSIX.2 specifies. |
| |
| 2. Fixes to Readline |
| |
| a. After printing possible completions, all lines of a multi-line prompt |
| are redisplayed. |
| |
| b. Some changes were made to the terminal handling code in rltty.c to |
| work around AIX 4.2 bugs. |
| |
| 3. New Features in Bash |
| |
| a. There is a new loadable builtin: sprintf, with calling syntax |
| sprintf var format [args] |
| This provides an easy way to simulate ksh left- and right-justified |
| variable values. |
| |
| b. The expansions of \h and \H in prompt strings were swapped. \h now |
| expands to the hostname up to the first `.', as in bash-1.14. |
| |
| 4. New Features in Readline |
| |
| a. The bash-1.14 behavior when ^M is typed while doing an incremental |
| search was restored. ^J may now be used to terminate the search without |
| accepting the line. |
| |
| b. There is a new bindable variable: disable-completion. This inhibits |
| word completion and causes the completion character to be inserted as |
| if it had been bound to self-insert. |
| |
| ------------------------------------------------------------------------------ |
| This document details the changes between this version, bash-2.0-alpha3, |
| and the previous version, bash-2.0-alpha2. |
| |
| There is now a file `COMPAT' included in the distribution that lists the |
| user-visible incompatibilities between 1.14 and 2.0. |
| |
| 1. Changes to Bash |
| |
| a. Some work was done so that word splitting of the rhs of assignment |
| statements conforms more closely to historical practice. |
| |
| b. A couple of errant memory frees were fixed. |
| |
| c. A fix was made to the test builtin so it recognizes `<' and `>' as |
| binary operators. |
| |
| d. The GNU malloc in lib/malloc/malloc.c now scrambles memory as it's |
| allocated and freed. This is to catch callers that refer to freed |
| memory or assume something about newly-allocated memory. |
| |
| e. Fixed a problem with conversion to 12-hour time in the prompt |
| expansion code. |
| |
| f. Fixed a problem with configure's argument parsing order. Now you can |
| correctly turn on specific options after using --enable-minimal-config. |
| |
| g. The configure script now automatically disables the use of GNU malloc |
| on systems where it's appropriate (better than having people read the |
| NOTES file and do it manually). |
| |
| h. There are new prompt expansions (\v and \V) to insert version information |
| into the prompt strings. |
| |
| i. The default prompt string now includes the version number. |
| |
| j. Most of the builtins that take no options were changed to use the |
| internal getopt so they can produce proper error messages for -? |
| and incorrect options. |
| |
| k. Some system-specific changes were made for SVR4.2 and Solaris 2.5. |
| |
| l. Bash now uses PATH_MAX instead of MAXPATHLEN and NAME_MAX instead of |
| MAXNAMLEN. |
| |
| m. A couple of problems caused by uninitialized variables were fixed. |
| |
| n. There are a number of new loadable builtin examples: logname, basename, |
| dirname, tty, pathchk, tee, head, and rmdir. All of these conform to |
| POSIX.2. |
| |
| o. Bash now notices changes in TZ and calls tzset() if present, so |
| changing TZ will alter the time printed by prompt expansions. |
| |
| p. The source was reorganized a bit so I don't have to wait so long for |
| some files to compile, and to facilitate the creation of a `shell |
| library' at some future point. |
| |
| q. Bash no longer turns off job control if called as `sh', since the |
| POSIX.2 spec includes job control as a standard feature. |
| |
| r. `bash -o posix' now works as intended. |
| |
| s. Fixed a problem with the completion code: when completing a filename |
| that contained globbing characters, if show-all-if-ambiguous was set, |
| the completion code would remove the user's text. |
| |
| t. Fixed ulimit so that (hopefully) the full range of limits is available |
| on HPUX systems. |
| |
| u. A new `shopt' option (`hostcomplete') enables and disables hostname |
| completion. |
| |
| v. The shell no longer attempts to save the history on an abort(), |
| which is usually called by programming_error(). |
| |
| w. The `-s' option to `fc' was changed to echo the command to be executed |
| to stderr instead of stdout. |
| |
| x. If the editor invoked by `fc -e' exits with a non-zero status, no |
| commands are executed. |
| |
| y. Fixed a bug that made the shopt `histverify' option work incorrectly. |
| |
| z. There is a new variable `MACHTYPE' whose value is the GNU-style |
| `cpu-company-system' system description as set by configure. (The |
| values of MACHTYPE and HOSTTYPE should really be swapped.) |
| |
| aa. The `ulimit' builtin now allows the maximum virtual memory size to be |
| set via setrlimit(2) if RLIMIT_VMEM is defined. |
| |
| bb. `bash -nc 'command'' no longer runs `command'. |
| |
| 2. Changes to Readline |
| |
| a. Fixed a typo in the code that checked for FIONREAD in input.c. |
| |
| b. Fixed a bug in the code that outputs keybindings, so things like C-\ |
| are quoted properly. |
| |
| c. Fixed a bug in the inputrc file parsing code to handle the problems |
| caused by inputrc files created from the output of `bind -p' in |
| previous versions of bash. The problem was due to the bug fixed |
| in item b above. |
| |
| d. Readline no longer turns off the terminal's meta key, and turns it on |
| once the first time it's called. |
| |
| ------------------------------------------------------------------------------ |
| This file documents the changes between this version, bash-2.0-alpha2, |
| and the previous version, bash-2.0-alpha. |
| |
| 1. Changes to Bash |
| |
| a. The shell no longer thinks directories are executable. |
| |
| b. `disown' has a new option, `h', which inhibits the resending of SIGHUP |
| but does not remove the job from the jobs table. |
| |
| c. The varargs functions in error.c now use ANSI-C `stdarg' if available. |
| |
| d. The build process now treats the `build version' in .build as local to |
| the build directory, so different versions built from the same source |
| tree have different `build versions'. |
| |
| e. Some problems with the grammar have been fixed. (It used `list' in a few |
| productions where `compound_list' was needed. A `list' must be terminated |
| with a newline or semicolon; a `compound_list' need not be.) |
| |
| f. A fix was made to keep `wait' from hanging when waiting for all background |
| jobs. |
| |
| g. `bash --help' now writes its output to stdout, like the GNU Coding Standards |
| specify, and includes the machine type (the value of MACHTYPE). |
| |
| h. `bash --version' now prints more information and exits successfully, like |
| the GNU Coding Standards specify. |
| |
| i. The output of `time' and `times' now prints fractional seconds with three |
| places after the decimal point. |
| |
| j. A bug that caused process substitutions to screw up the pipeline printed |
| by `jobs' was fixed. |
| |
| k. Fixes were made to the code that implements $'...' and $"..." so they |
| work as documented. |
| |
| l. The process substitution code now opens named pipes for reading with |
| O_NONBLOCK to avoid hanging. |
| |
| m. Fixes were made to the trap code so the shell cleans up correctly if the |
| trap command contains a `return' and we're executing a function or |
| sourcing a script with `.'. |
| |
| n. Fixes to doc/Makefile.in so that it doesn't try to remake all of the |
| documentation (ps, dvi, etc.) on a `make install'. |
| |
| o. Fixed an auto-increment error that caused bash -c args to sometimes dump |
| core. |
| |
| p. Fixed a bug that caused $HISTIGNORE to fail when the history line |
| contained globbing characters. |
| |
| 2. Changes to Readline |
| |
| a. There is a new string variable, rl_library_version, available for use by |
| applications. The current value is "2.1". |
| |
| b. A bug encountered when expand-tilde was enabled and file completion was |
| attempted on a word beginning with `~/' was fixed. |
| |
| c. A slight change was made to the incremental search termination behavior. |
| ESC still terminates the search, but if input is pending or arrives |
| within 0.1 seconds (on systems with select(2)), it is used as a prefix |
| character. This is intented to allow users to terminate searches with |
| the arrow keys and get the behavior they expect. |