Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 1 | /* execute_cmd.c -- Execute a COMMAND structure. */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3 | /* Copyright (C) 1987-2013 Free Software Foundation, Inc. |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4 | |
| 5 | This file is part of GNU Bash, the Bourne Again SHell. |
| 6 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 7 | Bash is free software: you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation, either version 3 of the License, or |
| 10 | (at your option) any later version. |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 11 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 12 | Bash is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 16 | |
| 17 | You should have received a copy of the GNU General Public License |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
| 20 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 21 | #include "config.h" |
| 22 | |
| 23 | #if !defined (__GNUC__) && !defined (HAVE_ALLOCA_H) && defined (_AIX) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 24 | #pragma alloca |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 25 | #endif /* _AIX && RISC6000 && !__GNUC__ */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 26 | |
| 27 | #include <stdio.h> |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 28 | #include "chartypes.h" |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 29 | #include "bashtypes.h" |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 30 | #if !defined (_MINIX) && defined (HAVE_SYS_FILE_H) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 31 | # include <sys/file.h> |
| 32 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 33 | #include "filecntl.h" |
| 34 | #include "posixstat.h" |
| 35 | #include <signal.h> |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 36 | #if defined (HAVE_SYS_PARAM_H) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 37 | # include <sys/param.h> |
| 38 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 39 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 40 | #if defined (HAVE_UNISTD_H) |
| 41 | # include <unistd.h> |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 42 | #endif |
| 43 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 44 | #include "posixtime.h" |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 45 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 46 | #if defined (HAVE_SYS_RESOURCE_H) && !defined (RLIMTYPE) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 47 | # include <sys/resource.h> |
| 48 | #endif |
| 49 | |
| 50 | #if defined (HAVE_SYS_TIMES_H) && defined (HAVE_TIMES) |
| 51 | # include <sys/times.h> |
| 52 | #endif |
| 53 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 54 | #include <errno.h> |
| 55 | |
| 56 | #if !defined (errno) |
| 57 | extern int errno; |
| 58 | #endif |
| 59 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 60 | #define NEED_FPURGE_DECL |
| 61 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 62 | #include "bashansi.h" |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 63 | #include "bashintl.h" |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 64 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 65 | #include "memalloc.h" |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 66 | #include "shell.h" |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 67 | #include <y.tab.h> /* use <...> so we pick it up from the build directory */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 68 | #include "flags.h" |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 69 | #include "builtins.h" |
| 70 | #include "hashlib.h" |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 71 | #include "jobs.h" |
| 72 | #include "execute_cmd.h" |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 73 | #include "findcmd.h" |
| 74 | #include "redir.h" |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 75 | #include "trap.h" |
| 76 | #include "pathexp.h" |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 77 | #include "hashcmd.h" |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 78 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 79 | #if defined (COND_COMMAND) |
| 80 | # include "test.h" |
| 81 | #endif |
| 82 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 83 | #include "builtins/common.h" |
| 84 | #include "builtins/builtext.h" /* list of builtins */ |
| 85 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 86 | #include <glob/strmatch.h> |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 87 | #include <tilde/tilde.h> |
| 88 | |
| 89 | #if defined (BUFFERED_INPUT) |
| 90 | # include "input.h" |
| 91 | #endif |
| 92 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 93 | #if defined (ALIAS) |
| 94 | # include "alias.h" |
| 95 | #endif |
| 96 | |
| 97 | #if defined (HISTORY) |
| 98 | # include "bashhist.h" |
| 99 | #endif |
| 100 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 101 | extern int dollar_dollar_pid; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 102 | extern int posixly_correct; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 103 | extern int expand_aliases; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 104 | extern int autocd; |
| 105 | extern int breaking, continuing, loop_level; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 106 | extern int parse_and_execute_level, running_trap, sourcelevel; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 107 | extern int command_string_index, line_number; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 108 | extern int dot_found_in_search; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 109 | extern int already_making_children; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 110 | extern int tempenv_assign_error; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 111 | extern char *the_printed_command, *shell_name; |
| 112 | extern pid_t last_command_subst_pid; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 113 | extern sh_builtin_func_t *last_shell_builtin, *this_shell_builtin; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 114 | extern char **subshell_argv, **subshell_envp; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 115 | extern int subshell_argc; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 116 | extern time_t shell_start_time; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 117 | #if 0 |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 118 | extern char *glob_argv_flags; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 119 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 120 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 121 | extern int job_control; /* XXX */ |
| 122 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 123 | extern int close __P((int)); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 124 | |
| 125 | /* Static functions defined and used in this file. */ |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 126 | static void close_pipes __P((int, int)); |
| 127 | static void do_piping __P((int, int)); |
| 128 | static void bind_lastarg __P((char *)); |
| 129 | static int shell_control_structure __P((enum command_type)); |
| 130 | static void cleanup_redirects __P((REDIRECT *)); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 131 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 132 | #if defined (JOB_CONTROL) |
| 133 | static int restore_signal_mask __P((sigset_t *)); |
| 134 | #endif |
| 135 | |
| 136 | static void async_redirect_stdin __P((void)); |
| 137 | |
| 138 | static int builtin_status __P((int)); |
| 139 | |
| 140 | static int execute_for_command __P((FOR_COM *)); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 141 | #if defined (SELECT_COMMAND) |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 142 | static int displen __P((const char *)); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 143 | static int print_index_and_element __P((int, int, WORD_LIST *)); |
| 144 | static void indent __P((int, int)); |
| 145 | static void print_select_list __P((WORD_LIST *, int, int, int)); |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 146 | static char *select_query __P((WORD_LIST *, int, char *, int)); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 147 | static int execute_select_command __P((SELECT_COM *)); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 148 | #endif |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 149 | #if defined (DPAREN_ARITHMETIC) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 150 | static int execute_arith_command __P((ARITH_COM *)); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 151 | #endif |
| 152 | #if defined (COND_COMMAND) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 153 | static int execute_cond_node __P((COND_COM *)); |
| 154 | static int execute_cond_command __P((COND_COM *)); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 155 | #endif |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 156 | #if defined (COMMAND_TIMING) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 157 | static int mkfmt __P((char *, int, int, time_t, int)); |
| 158 | static void print_formatted_time __P((FILE *, char *, |
| 159 | time_t, int, time_t, int, |
| 160 | time_t, int, int)); |
| 161 | static int time_command __P((COMMAND *, int, int, int, struct fd_bitmap *)); |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 162 | #endif |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 163 | #if defined (ARITH_FOR_COMMAND) |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 164 | static intmax_t eval_arith_for_expr __P((WORD_LIST *, int *)); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 165 | static int execute_arith_for_command __P((ARITH_FOR_COM *)); |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 166 | #endif |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 167 | static int execute_case_command __P((CASE_COM *)); |
| 168 | static int execute_while_command __P((WHILE_COM *)); |
| 169 | static int execute_until_command __P((WHILE_COM *)); |
| 170 | static int execute_while_or_until __P((WHILE_COM *, int)); |
| 171 | static int execute_if_command __P((IF_COM *)); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 172 | static int execute_null_command __P((REDIRECT *, int, int, int)); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 173 | static void fix_assignment_words __P((WORD_LIST *)); |
| 174 | static int execute_simple_command __P((SIMPLE_COM *, int, int, int, struct fd_bitmap *)); |
| 175 | static int execute_builtin __P((sh_builtin_func_t *, WORD_LIST *, int, int)); |
| 176 | static int execute_function __P((SHELL_VAR *, WORD_LIST *, int, struct fd_bitmap *, int, int)); |
| 177 | static int execute_builtin_or_function __P((WORD_LIST *, sh_builtin_func_t *, |
| 178 | SHELL_VAR *, |
| 179 | REDIRECT *, struct fd_bitmap *, int)); |
| 180 | static void execute_subshell_builtin_or_function __P((WORD_LIST *, REDIRECT *, |
| 181 | sh_builtin_func_t *, |
| 182 | SHELL_VAR *, |
| 183 | int, int, int, |
| 184 | struct fd_bitmap *, |
| 185 | int)); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 186 | static int execute_disk_command __P((WORD_LIST *, REDIRECT *, char *, |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 187 | int, int, int, struct fd_bitmap *, int)); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 188 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 189 | static char *getinterp __P((char *, int, int *)); |
| 190 | static void initialize_subshell __P((void)); |
| 191 | static int execute_in_subshell __P((COMMAND *, int, int, int, struct fd_bitmap *)); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 192 | #if defined (COPROCESS_SUPPORT) |
| 193 | static int execute_coproc __P((COMMAND *, int, int, struct fd_bitmap *)); |
| 194 | #endif |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 195 | |
| 196 | static int execute_pipeline __P((COMMAND *, int, int, int, struct fd_bitmap *)); |
| 197 | |
| 198 | static int execute_connection __P((COMMAND *, int, int, int, struct fd_bitmap *)); |
| 199 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 200 | static int execute_intern_function __P((WORD_DESC *, FUNCTION_DEF *)); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 201 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 202 | /* Set to 1 if fd 0 was the subject of redirection to a subshell. Global |
| 203 | so that reader_loop can set it to zero before executing a command. */ |
| 204 | int stdin_redir; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 205 | |
| 206 | /* The name of the command that is currently being executed. |
| 207 | `test' needs this, for example. */ |
| 208 | char *this_command_name; |
| 209 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 210 | /* The printed representation of the currently-executing command (same as |
| 211 | the_printed_command), except when a trap is being executed. Useful for |
| 212 | a debugger to know where exactly the program is currently executing. */ |
| 213 | char *the_printed_command_except_trap; |
| 214 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 215 | /* For catching RETURN in a function. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 216 | int return_catch_flag; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 217 | int return_catch_value; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 218 | procenv_t return_catch; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 219 | |
| 220 | /* The value returned by the last synchronous command. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 221 | int last_command_exit_value; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 222 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 223 | /* Whether or not the last command (corresponding to last_command_exit_value) |
| 224 | was terminated by a signal, and, if so, which one. */ |
| 225 | int last_command_exit_signal; |
| 226 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 227 | /* Are we currently ignoring the -e option for the duration of a builtin's |
| 228 | execution? */ |
| 229 | int builtin_ignoring_errexit = 0; |
| 230 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 231 | /* The list of redirections to perform which will undo the redirections |
| 232 | that I made in the shell. */ |
| 233 | REDIRECT *redirection_undo_list = (REDIRECT *)NULL; |
| 234 | |
| 235 | /* The list of redirections to perform which will undo the internal |
| 236 | redirections performed by the `exec' builtin. These are redirections |
| 237 | that must be undone even when exec discards redirection_undo_list. */ |
| 238 | REDIRECT *exec_redirection_undo_list = (REDIRECT *)NULL; |
| 239 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 240 | /* When greater than zero, value is the `level' of builtins we are |
| 241 | currently executing (e.g. `eval echo a' would have it set to 2). */ |
| 242 | int executing_builtin = 0; |
| 243 | |
| 244 | /* Non-zero if we are executing a command list (a;b;c, etc.) */ |
| 245 | int executing_list = 0; |
| 246 | |
| 247 | /* Non-zero if failing commands in a command substitution should not exit the |
| 248 | shell even if -e is set. Used to pass the CMD_IGNORE_RETURN flag down to |
| 249 | commands run in command substitutions by parse_and_execute. */ |
| 250 | int comsub_ignore_return = 0; |
| 251 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 252 | /* Non-zero if we have just forked and are currently running in a subshell |
| 253 | environment. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 254 | int subshell_environment; |
| 255 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 256 | /* Count of nested subshells, like SHLVL. Available via $BASH_SUBSHELL */ |
| 257 | int subshell_level = 0; |
| 258 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 259 | /* Currently-executing shell function. */ |
| 260 | SHELL_VAR *this_shell_function; |
| 261 | |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 262 | /* If non-zero, matches in case and [[ ... ]] are case-insensitive */ |
| 263 | int match_ignore_case = 0; |
| 264 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 265 | int executing_command_builtin = 0; |
| 266 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 267 | struct stat SB; /* used for debugging */ |
| 268 | |
| 269 | static int special_builtin_failed; |
| 270 | |
| 271 | static COMMAND *currently_executing_command; |
| 272 | |
| 273 | /* The line number that the currently executing function starts on. */ |
| 274 | static int function_line_number; |
| 275 | |
| 276 | /* XXX - set to 1 if we're running the DEBUG trap and we want to show the line |
| 277 | number containing the function name. Used by executing_line_number to |
| 278 | report the correct line number. Kind of a hack. */ |
| 279 | static int showing_function_line; |
| 280 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 281 | /* $LINENO ($BASH_LINENO) for use by an ERR trap. Global so parse_and_execute |
| 282 | can save and restore it. */ |
| 283 | int line_number_for_err_trap; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 284 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 285 | /* A sort of function nesting level counter */ |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 286 | int funcnest = 0; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 287 | int funcnest_max = 0; /* bash-4.2 */ |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 288 | |
| 289 | int lastpipe_opt = 0; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 290 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 291 | struct fd_bitmap *current_fds_to_close = (struct fd_bitmap *)NULL; |
| 292 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 293 | #define FD_BITMAP_DEFAULT_SIZE 32 |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 294 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 295 | /* Functions to allocate and deallocate the structures used to pass |
| 296 | information from the shell to its children about file descriptors |
| 297 | to close. */ |
| 298 | struct fd_bitmap * |
| 299 | new_fd_bitmap (size) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 300 | int size; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 301 | { |
| 302 | struct fd_bitmap *ret; |
| 303 | |
| 304 | ret = (struct fd_bitmap *)xmalloc (sizeof (struct fd_bitmap)); |
| 305 | |
| 306 | ret->size = size; |
| 307 | |
| 308 | if (size) |
| 309 | { |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 310 | ret->bitmap = (char *)xmalloc (size); |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 311 | memset (ret->bitmap, '\0', size); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 312 | } |
| 313 | else |
| 314 | ret->bitmap = (char *)NULL; |
| 315 | return (ret); |
| 316 | } |
| 317 | |
| 318 | void |
| 319 | dispose_fd_bitmap (fdbp) |
| 320 | struct fd_bitmap *fdbp; |
| 321 | { |
| 322 | FREE (fdbp->bitmap); |
| 323 | free (fdbp); |
| 324 | } |
| 325 | |
| 326 | void |
| 327 | close_fd_bitmap (fdbp) |
| 328 | struct fd_bitmap *fdbp; |
| 329 | { |
| 330 | register int i; |
| 331 | |
| 332 | if (fdbp) |
| 333 | { |
| 334 | for (i = 0; i < fdbp->size; i++) |
| 335 | if (fdbp->bitmap[i]) |
| 336 | { |
| 337 | close (i); |
| 338 | fdbp->bitmap[i] = 0; |
| 339 | } |
| 340 | } |
| 341 | } |
| 342 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 343 | /* Return the line number of the currently executing command. */ |
| 344 | int |
| 345 | executing_line_number () |
| 346 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 347 | if (executing && showing_function_line == 0 && |
| 348 | (variable_context == 0 || interactive_shell == 0) && |
| 349 | currently_executing_command) |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 350 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 351 | #if defined (COND_COMMAND) |
| 352 | if (currently_executing_command->type == cm_cond) |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 353 | return currently_executing_command->value.Cond->line; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 354 | #endif |
| 355 | #if defined (DPAREN_ARITHMETIC) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 356 | if (currently_executing_command->type == cm_arith) |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 357 | return currently_executing_command->value.Arith->line; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 358 | #endif |
| 359 | #if defined (ARITH_FOR_COMMAND) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 360 | if (currently_executing_command->type == cm_arith_for) |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 361 | return currently_executing_command->value.ArithFor->line; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 362 | #endif |
| 363 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 364 | return line_number; |
| 365 | } |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 366 | else |
| 367 | return line_number; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 368 | } |
| 369 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 370 | /* Execute the command passed in COMMAND. COMMAND is exactly what |
| 371 | read_command () places into GLOBAL_COMMAND. See "command.h" for the |
| 372 | details of the command structure. |
| 373 | |
| 374 | EXECUTION_SUCCESS or EXECUTION_FAILURE are the only possible |
| 375 | return values. Executing a command with nothing in it returns |
| 376 | EXECUTION_SUCCESS. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 377 | int |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 378 | execute_command (command) |
| 379 | COMMAND *command; |
| 380 | { |
| 381 | struct fd_bitmap *bitmap; |
| 382 | int result; |
| 383 | |
| 384 | current_fds_to_close = (struct fd_bitmap *)NULL; |
| 385 | bitmap = new_fd_bitmap (FD_BITMAP_DEFAULT_SIZE); |
| 386 | begin_unwind_frame ("execute-command"); |
| 387 | add_unwind_protect (dispose_fd_bitmap, (char *)bitmap); |
| 388 | |
| 389 | /* Just do the command, but not asynchronously. */ |
| 390 | result = execute_command_internal (command, 0, NO_PIPE, NO_PIPE, bitmap); |
| 391 | |
| 392 | dispose_fd_bitmap (bitmap); |
| 393 | discard_unwind_frame ("execute-command"); |
| 394 | |
| 395 | #if defined (PROCESS_SUBSTITUTION) |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 396 | /* don't unlink fifos if we're in a shell function; wait until the function |
| 397 | returns. */ |
| 398 | if (variable_context == 0) |
| 399 | unlink_fifo_list (); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 400 | #endif /* PROCESS_SUBSTITUTION */ |
| 401 | |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 402 | QUIT; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 403 | return (result); |
| 404 | } |
| 405 | |
| 406 | /* Return 1 if TYPE is a shell control structure type. */ |
| 407 | static int |
| 408 | shell_control_structure (type) |
| 409 | enum command_type type; |
| 410 | { |
| 411 | switch (type) |
| 412 | { |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 413 | #if defined (ARITH_FOR_COMMAND) |
| 414 | case cm_arith_for: |
| 415 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 416 | #if defined (SELECT_COMMAND) |
| 417 | case cm_select: |
| 418 | #endif |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 419 | #if defined (DPAREN_ARITHMETIC) |
| 420 | case cm_arith: |
| 421 | #endif |
| 422 | #if defined (COND_COMMAND) |
| 423 | case cm_cond: |
| 424 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 425 | case cm_case: |
| 426 | case cm_while: |
| 427 | case cm_until: |
| 428 | case cm_if: |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 429 | case cm_for: |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 430 | case cm_group: |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 431 | case cm_function_def: |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 432 | return (1); |
| 433 | |
| 434 | default: |
| 435 | return (0); |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | /* A function to use to unwind_protect the redirection undo list |
| 440 | for loops. */ |
| 441 | static void |
| 442 | cleanup_redirects (list) |
| 443 | REDIRECT *list; |
| 444 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 445 | do_redirections (list, RX_ACTIVE); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 446 | dispose_redirects (list); |
| 447 | } |
| 448 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 449 | #if 0 |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 450 | /* Function to unwind_protect the redirections for functions and builtins. */ |
| 451 | static void |
| 452 | cleanup_func_redirects (list) |
| 453 | REDIRECT *list; |
| 454 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 455 | do_redirections (list, RX_ACTIVE); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 456 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 457 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 458 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 459 | void |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 460 | dispose_exec_redirects () |
| 461 | { |
| 462 | if (exec_redirection_undo_list) |
| 463 | { |
| 464 | dispose_redirects (exec_redirection_undo_list); |
| 465 | exec_redirection_undo_list = (REDIRECT *)NULL; |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | #if defined (JOB_CONTROL) |
| 470 | /* A function to restore the signal mask to its proper value when the shell |
| 471 | is interrupted or errors occur while creating a pipeline. */ |
| 472 | static int |
| 473 | restore_signal_mask (set) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 474 | sigset_t *set; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 475 | { |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 476 | return (sigprocmask (SIG_SETMASK, set, (sigset_t *)NULL)); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 477 | } |
| 478 | #endif /* JOB_CONTROL */ |
| 479 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 480 | #ifdef DEBUG |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 481 | /* A debugging function that can be called from gdb, for instance. */ |
| 482 | void |
| 483 | open_files () |
| 484 | { |
| 485 | register int i; |
| 486 | int f, fd_table_size; |
| 487 | |
| 488 | fd_table_size = getdtablesize (); |
| 489 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 490 | fprintf (stderr, "pid %ld open files:", (long)getpid ()); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 491 | for (i = 3; i < fd_table_size; i++) |
| 492 | { |
| 493 | if ((f = fcntl (i, F_GETFD, 0)) != -1) |
| 494 | fprintf (stderr, " %d (%s)", i, f ? "close" : "open"); |
| 495 | } |
| 496 | fprintf (stderr, "\n"); |
| 497 | } |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 498 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 499 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 500 | static void |
| 501 | async_redirect_stdin () |
| 502 | { |
| 503 | int fd; |
| 504 | |
| 505 | fd = open ("/dev/null", O_RDONLY); |
| 506 | if (fd > 0) |
| 507 | { |
| 508 | dup2 (fd, 0); |
| 509 | close (fd); |
| 510 | } |
| 511 | else if (fd < 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 512 | internal_error (_("cannot redirect standard input from /dev/null: %s"), strerror (errno)); |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 513 | } |
| 514 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 515 | #define DESCRIBE_PID(pid) do { if (interactive) describe_pid (pid); } while (0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 516 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 517 | /* Execute the command passed in COMMAND, perhaps doing it asynchronously. |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 518 | COMMAND is exactly what read_command () places into GLOBAL_COMMAND. |
| 519 | ASYNCHROUNOUS, if non-zero, says to do this command in the background. |
| 520 | PIPE_IN and PIPE_OUT are file descriptors saying where input comes |
| 521 | from and where it goes. They can have the value of NO_PIPE, which means |
| 522 | I/O is stdin/stdout. |
| 523 | FDS_TO_CLOSE is a list of file descriptors to close once the child has |
| 524 | been forked. This list often contains the unusable sides of pipes, etc. |
| 525 | |
| 526 | EXECUTION_SUCCESS or EXECUTION_FAILURE are the only possible |
| 527 | return values. Executing a command with nothing in it returns |
| 528 | EXECUTION_SUCCESS. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 529 | int |
| 530 | execute_command_internal (command, asynchronous, pipe_in, pipe_out, |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 531 | fds_to_close) |
| 532 | COMMAND *command; |
| 533 | int asynchronous; |
| 534 | int pipe_in, pipe_out; |
| 535 | struct fd_bitmap *fds_to_close; |
| 536 | { |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 537 | int exec_result, user_subshell, invert, ignore_return, was_error_trap; |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 538 | REDIRECT *my_undo_list, *exec_undo_list; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 539 | char *tcmd; |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 540 | volatile int last_pid; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 541 | volatile int save_line_number; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 542 | #if defined (PROCESS_SUBSTITUTION) |
| 543 | volatile int ofifo, nfifo, osize, saved_fifo; |
| 544 | volatile char *ofifo_list; |
| 545 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 546 | |
Jari Aalto | f1be666 | 2008-11-18 13:15:12 +0000 | [diff] [blame] | 547 | if (breaking || continuing) |
| 548 | return (last_command_exit_value); |
| 549 | if (command == 0 || read_but_dont_execute) |
| 550 | return (EXECUTION_SUCCESS); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 551 | |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 552 | QUIT; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 553 | run_pending_traps (); |
| 554 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 555 | #if 0 |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 556 | if (running_trap == 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 557 | #endif |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 558 | currently_executing_command = command; |
| 559 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 560 | invert = (command->flags & CMD_INVERT_RETURN) != 0; |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 561 | |
| 562 | /* If we're inverting the return value and `set -e' has been executed, |
| 563 | we don't want a failing command to inadvertently cause the shell |
| 564 | to exit. */ |
| 565 | if (exit_immediately_on_error && invert) /* XXX */ |
| 566 | command->flags |= CMD_IGNORE_RETURN; /* XXX */ |
| 567 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 568 | exec_result = EXECUTION_SUCCESS; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 569 | |
| 570 | /* If a command was being explicitly run in a subshell, or if it is |
| 571 | a shell control-structure, and it has a pipe, then we do the command |
| 572 | in a subshell. */ |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 573 | if (command->type == cm_subshell && (command->flags & CMD_NO_FORK)) |
| 574 | return (execute_in_subshell (command, asynchronous, pipe_in, pipe_out, fds_to_close)); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 575 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 576 | #if defined (COPROCESS_SUPPORT) |
| 577 | if (command->type == cm_coproc) |
| 578 | return (execute_coproc (command, pipe_in, pipe_out, fds_to_close)); |
| 579 | #endif |
| 580 | |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 581 | user_subshell = command->type == cm_subshell || ((command->flags & CMD_WANT_SUBSHELL) != 0); |
| 582 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 583 | if (command->type == cm_subshell || |
| 584 | (command->flags & (CMD_WANT_SUBSHELL|CMD_FORCE_SUBSHELL)) || |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 585 | (shell_control_structure (command->type) && |
| 586 | (pipe_out != NO_PIPE || pipe_in != NO_PIPE || asynchronous))) |
| 587 | { |
| 588 | pid_t paren_pid; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 589 | int s; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 590 | |
| 591 | /* Fork a subshell, turn off the subshell bit, turn off job |
| 592 | control and call execute_command () on the command again. */ |
Chet Ramey | 89a9286 | 2011-11-21 20:49:12 -0500 | [diff] [blame] | 593 | line_number_for_err_trap = line_number; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 594 | tcmd = make_command_string (command); |
| 595 | paren_pid = make_child (savestring (tcmd), asynchronous); |
| 596 | |
| 597 | if (user_subshell && signal_is_trapped (ERROR_TRAP) && |
| 598 | signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0) |
| 599 | { |
| 600 | FREE (the_printed_command_except_trap); |
| 601 | the_printed_command_except_trap = savestring (the_printed_command); |
| 602 | } |
| 603 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 604 | if (paren_pid == 0) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 605 | { |
| 606 | /* We want to run the exit trap for forced {} subshells, and we |
| 607 | want to note this before execute_in_subshell modifies the |
| 608 | COMMAND struct. Need to keep in mind that execute_in_subshell |
| 609 | runs the exit trap for () subshells itself. */ |
| 610 | /* This handles { command; } & */ |
| 611 | s = user_subshell == 0 && command->type == cm_group && pipe_in == NO_PIPE && pipe_out == NO_PIPE && asynchronous; |
| 612 | /* run exit trap for : | { ...; } and { ...; } | : */ |
| 613 | /* run exit trap for : | ( ...; ) and ( ...; ) | : */ |
| 614 | s += user_subshell == 0 && command->type == cm_group && (pipe_in != NO_PIPE || pipe_out != NO_PIPE) && asynchronous == 0; |
| 615 | |
| 616 | last_command_exit_value = execute_in_subshell (command, asynchronous, pipe_in, pipe_out, fds_to_close); |
| 617 | if (s) |
| 618 | subshell_exit (last_command_exit_value); |
| 619 | else |
| 620 | exit (last_command_exit_value); |
| 621 | /* NOTREACHED */ |
| 622 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 623 | else |
| 624 | { |
| 625 | close_pipes (pipe_in, pipe_out); |
| 626 | |
| 627 | #if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 628 | if (variable_context == 0) /* wait until shell function completes */ |
| 629 | unlink_fifo_list (); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 630 | #endif |
| 631 | /* If we are part of a pipeline, and not the end of the pipeline, |
| 632 | then we should simply return and let the last command in the |
| 633 | pipe be waited for. If we are not in a pipeline, or are the |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 634 | last command in the pipeline, then we wait for the subshell |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 635 | and return its exit status as usual. */ |
| 636 | if (pipe_out != NO_PIPE) |
| 637 | return (EXECUTION_SUCCESS); |
| 638 | |
| 639 | stop_pipeline (asynchronous, (COMMAND *)NULL); |
| 640 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 641 | if (asynchronous == 0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 642 | { |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 643 | was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0; |
| 644 | invert = (command->flags & CMD_INVERT_RETURN) != 0; |
| 645 | ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0; |
| 646 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 647 | exec_result = wait_for (paren_pid); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 648 | |
| 649 | /* If we have to, invert the return value. */ |
| 650 | if (invert) |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 651 | exec_result = ((exec_result == EXECUTION_SUCCESS) |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 652 | ? EXECUTION_FAILURE |
| 653 | : EXECUTION_SUCCESS); |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 654 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 655 | last_command_exit_value = exec_result; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 656 | if (user_subshell && was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS) |
| 657 | { |
Chet Ramey | 89a9286 | 2011-11-21 20:49:12 -0500 | [diff] [blame] | 658 | save_line_number = line_number; |
| 659 | line_number = line_number_for_err_trap; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 660 | run_error_trap (); |
Chet Ramey | 89a9286 | 2011-11-21 20:49:12 -0500 | [diff] [blame] | 661 | line_number = save_line_number; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | if (user_subshell && ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS) |
| 665 | { |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 666 | run_pending_traps (); |
| 667 | jump_to_top_level (ERREXIT); |
| 668 | } |
| 669 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 670 | return (last_command_exit_value); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 671 | } |
| 672 | else |
| 673 | { |
| 674 | DESCRIBE_PID (paren_pid); |
| 675 | |
| 676 | run_pending_traps (); |
| 677 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 678 | /* Posix 2013 2.9.3.1: "the exit status of an asynchronous list |
| 679 | shall be zero." */ |
| 680 | last_command_exit_value = 0; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 681 | return (EXECUTION_SUCCESS); |
| 682 | } |
| 683 | } |
| 684 | } |
| 685 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 686 | #if defined (COMMAND_TIMING) |
| 687 | if (command->flags & CMD_TIME_PIPELINE) |
| 688 | { |
| 689 | if (asynchronous) |
| 690 | { |
| 691 | command->flags |= CMD_FORCE_SUBSHELL; |
| 692 | exec_result = execute_command_internal (command, 1, pipe_in, pipe_out, fds_to_close); |
| 693 | } |
| 694 | else |
| 695 | { |
| 696 | exec_result = time_command (command, asynchronous, pipe_in, pipe_out, fds_to_close); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 697 | #if 0 |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 698 | if (running_trap == 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 699 | #endif |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 700 | currently_executing_command = (COMMAND *)NULL; |
| 701 | } |
| 702 | return (exec_result); |
| 703 | } |
| 704 | #endif /* COMMAND_TIMING */ |
| 705 | |
| 706 | if (shell_control_structure (command->type) && command->redirects) |
| 707 | stdin_redir = stdin_redirects (command->redirects); |
| 708 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 709 | #if defined (PROCESS_SUBSTITUTION) |
| 710 | if (variable_context != 0) |
| 711 | { |
| 712 | ofifo = num_fifos (); |
| 713 | ofifo_list = copy_fifo_list ((int *)&osize); |
| 714 | saved_fifo = 1; |
| 715 | } |
| 716 | else |
| 717 | saved_fifo = 0; |
| 718 | #endif |
| 719 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 720 | /* Handle WHILE FOR CASE etc. with redirections. (Also '&' input |
| 721 | redirection.) */ |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 722 | if (do_redirections (command->redirects, RX_ACTIVE|RX_UNDOABLE) != 0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 723 | { |
| 724 | cleanup_redirects (redirection_undo_list); |
| 725 | redirection_undo_list = (REDIRECT *)NULL; |
| 726 | dispose_exec_redirects (); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 727 | #if defined (PROCESS_SUBSTITUTION) |
| 728 | if (saved_fifo) |
| 729 | free ((void *)ofifo_list); |
| 730 | #endif |
Jari Aalto | f1be666 | 2008-11-18 13:15:12 +0000 | [diff] [blame] | 731 | return (last_command_exit_value = EXECUTION_FAILURE); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | if (redirection_undo_list) |
| 735 | { |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 736 | /* XXX - why copy here? */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 737 | my_undo_list = (REDIRECT *)copy_redirects (redirection_undo_list); |
| 738 | dispose_redirects (redirection_undo_list); |
| 739 | redirection_undo_list = (REDIRECT *)NULL; |
| 740 | } |
| 741 | else |
| 742 | my_undo_list = (REDIRECT *)NULL; |
| 743 | |
| 744 | if (exec_redirection_undo_list) |
| 745 | { |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 746 | /* XXX - why copy here? */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 747 | exec_undo_list = (REDIRECT *)copy_redirects (exec_redirection_undo_list); |
| 748 | dispose_redirects (exec_redirection_undo_list); |
| 749 | exec_redirection_undo_list = (REDIRECT *)NULL; |
| 750 | } |
| 751 | else |
| 752 | exec_undo_list = (REDIRECT *)NULL; |
| 753 | |
| 754 | if (my_undo_list || exec_undo_list) |
| 755 | begin_unwind_frame ("loop_redirections"); |
| 756 | |
| 757 | if (my_undo_list) |
| 758 | add_unwind_protect ((Function *)cleanup_redirects, my_undo_list); |
| 759 | |
| 760 | if (exec_undo_list) |
| 761 | add_unwind_protect ((Function *)dispose_redirects, exec_undo_list); |
| 762 | |
| 763 | ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0; |
| 764 | |
| 765 | QUIT; |
| 766 | |
| 767 | switch (command->type) |
| 768 | { |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 769 | case cm_simple: |
| 770 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 771 | save_line_number = line_number; |
| 772 | /* We can't rely on variables retaining their values across a |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 773 | call to execute_simple_command if a longjmp occurs as the |
| 774 | result of a `return' builtin. This is true for sure with gcc. */ |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 775 | #if defined (RECYCLES_PIDS) |
| 776 | last_made_pid = NO_PID; |
| 777 | #endif |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 778 | last_pid = last_made_pid; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 779 | was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 780 | |
| 781 | if (ignore_return && command->value.Simple) |
| 782 | command->value.Simple->flags |= CMD_IGNORE_RETURN; |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 783 | if (command->flags & CMD_STDIN_REDIR) |
| 784 | command->value.Simple->flags |= CMD_STDIN_REDIR; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 785 | |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 786 | line_number_for_err_trap = line_number = command->value.Simple->line; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 787 | exec_result = |
| 788 | execute_simple_command (command->value.Simple, pipe_in, pipe_out, |
| 789 | asynchronous, fds_to_close); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 790 | line_number = save_line_number; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 791 | |
| 792 | /* The temporary environment should be used for only the simple |
| 793 | command immediately following its definition. */ |
| 794 | dispose_used_env_vars (); |
| 795 | |
| 796 | #if (defined (ultrix) && defined (mips)) || defined (C_ALLOCA) |
| 797 | /* Reclaim memory allocated with alloca () on machines which |
| 798 | may be using the alloca emulation code. */ |
| 799 | (void) alloca (0); |
| 800 | #endif /* (ultrix && mips) || C_ALLOCA */ |
| 801 | |
| 802 | /* If we forked to do the command, then we must wait_for () |
| 803 | the child. */ |
| 804 | |
| 805 | /* XXX - this is something to watch out for if there are problems |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 806 | when the shell is compiled without job control. Don't worry about |
| 807 | whether or not last_made_pid == last_pid; already_making_children |
| 808 | tells us whether or not there are unwaited-for children to wait |
| 809 | for and reap. */ |
| 810 | if (already_making_children && pipe_out == NO_PIPE) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 811 | { |
| 812 | stop_pipeline (asynchronous, (COMMAND *)NULL); |
| 813 | |
| 814 | if (asynchronous) |
| 815 | { |
| 816 | DESCRIBE_PID (last_made_pid); |
| 817 | } |
| 818 | else |
| 819 | #if !defined (JOB_CONTROL) |
| 820 | /* Do not wait for asynchronous processes started from |
| 821 | startup files. */ |
| 822 | if (last_made_pid != last_asynchronous_pid) |
| 823 | #endif |
| 824 | /* When executing a shell function that executes other |
| 825 | commands, this causes the last simple command in |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 826 | the function to be waited for twice. This also causes |
| 827 | subshells forked to execute builtin commands (e.g., in |
| 828 | pipelines) to be waited for twice. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 829 | exec_result = wait_for (last_made_pid); |
| 830 | } |
| 831 | } |
| 832 | |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 833 | /* 2009/02/13 -- pipeline failure is processed elsewhere. This handles |
| 834 | only the failure of a simple command. */ |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 835 | if (was_error_trap && ignore_return == 0 && invert == 0 && pipe_in == NO_PIPE && pipe_out == NO_PIPE && exec_result != EXECUTION_SUCCESS) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 836 | { |
| 837 | last_command_exit_value = exec_result; |
Chet Ramey | 89a9286 | 2011-11-21 20:49:12 -0500 | [diff] [blame] | 838 | line_number = line_number_for_err_trap; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 839 | run_error_trap (); |
Chet Ramey | 89a9286 | 2011-11-21 20:49:12 -0500 | [diff] [blame] | 840 | line_number = save_line_number; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 841 | } |
| 842 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 843 | if (ignore_return == 0 && invert == 0 && |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 844 | ((posixly_correct && interactive == 0 && special_builtin_failed) || |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 845 | (exit_immediately_on_error && pipe_in == NO_PIPE && pipe_out == NO_PIPE && exec_result != EXECUTION_SUCCESS))) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 846 | { |
| 847 | last_command_exit_value = exec_result; |
| 848 | run_pending_traps (); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 849 | jump_to_top_level (ERREXIT); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 850 | } |
| 851 | |
| 852 | break; |
| 853 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 854 | case cm_for: |
| 855 | if (ignore_return) |
| 856 | command->value.For->flags |= CMD_IGNORE_RETURN; |
| 857 | exec_result = execute_for_command (command->value.For); |
| 858 | break; |
| 859 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 860 | #if defined (ARITH_FOR_COMMAND) |
| 861 | case cm_arith_for: |
| 862 | if (ignore_return) |
| 863 | command->value.ArithFor->flags |= CMD_IGNORE_RETURN; |
| 864 | exec_result = execute_arith_for_command (command->value.ArithFor); |
| 865 | break; |
| 866 | #endif |
| 867 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 868 | #if defined (SELECT_COMMAND) |
| 869 | case cm_select: |
| 870 | if (ignore_return) |
| 871 | command->value.Select->flags |= CMD_IGNORE_RETURN; |
| 872 | exec_result = execute_select_command (command->value.Select); |
| 873 | break; |
| 874 | #endif |
| 875 | |
| 876 | case cm_case: |
| 877 | if (ignore_return) |
| 878 | command->value.Case->flags |= CMD_IGNORE_RETURN; |
| 879 | exec_result = execute_case_command (command->value.Case); |
| 880 | break; |
| 881 | |
| 882 | case cm_while: |
| 883 | if (ignore_return) |
| 884 | command->value.While->flags |= CMD_IGNORE_RETURN; |
| 885 | exec_result = execute_while_command (command->value.While); |
| 886 | break; |
| 887 | |
| 888 | case cm_until: |
| 889 | if (ignore_return) |
| 890 | command->value.While->flags |= CMD_IGNORE_RETURN; |
| 891 | exec_result = execute_until_command (command->value.While); |
| 892 | break; |
| 893 | |
| 894 | case cm_if: |
| 895 | if (ignore_return) |
| 896 | command->value.If->flags |= CMD_IGNORE_RETURN; |
| 897 | exec_result = execute_if_command (command->value.If); |
| 898 | break; |
| 899 | |
| 900 | case cm_group: |
| 901 | |
| 902 | /* This code can be executed from either of two paths: an explicit |
| 903 | '{}' command, or via a function call. If we are executed via a |
| 904 | function call, we have already taken care of the function being |
| 905 | executed in the background (down there in execute_simple_command ()), |
| 906 | and this command should *not* be marked as asynchronous. If we |
| 907 | are executing a regular '{}' group command, and asynchronous == 1, |
| 908 | we must want to execute the whole command in the background, so we |
| 909 | need a subshell, and we want the stuff executed in that subshell |
| 910 | (this group command) to be executed in the foreground of that |
| 911 | subshell (i.e. there will not be *another* subshell forked). |
| 912 | |
| 913 | What we do is to force a subshell if asynchronous, and then call |
| 914 | execute_command_internal again with asynchronous still set to 1, |
| 915 | but with the original group command, so the printed command will |
| 916 | look right. |
| 917 | |
| 918 | The code above that handles forking off subshells will note that |
| 919 | both subshell and async are on, and turn off async in the child |
| 920 | after forking the subshell (but leave async set in the parent, so |
| 921 | the normal call to describe_pid is made). This turning off |
| 922 | async is *crucial*; if it is not done, this will fall into an |
| 923 | infinite loop of executions through this spot in subshell after |
| 924 | subshell until the process limit is exhausted. */ |
| 925 | |
| 926 | if (asynchronous) |
| 927 | { |
| 928 | command->flags |= CMD_FORCE_SUBSHELL; |
| 929 | exec_result = |
| 930 | execute_command_internal (command, 1, pipe_in, pipe_out, |
| 931 | fds_to_close); |
| 932 | } |
| 933 | else |
| 934 | { |
| 935 | if (ignore_return && command->value.Group->command) |
| 936 | command->value.Group->command->flags |= CMD_IGNORE_RETURN; |
| 937 | exec_result = |
| 938 | execute_command_internal (command->value.Group->command, |
| 939 | asynchronous, pipe_in, pipe_out, |
| 940 | fds_to_close); |
| 941 | } |
| 942 | break; |
| 943 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 944 | case cm_connection: |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 945 | exec_result = execute_connection (command, asynchronous, |
| 946 | pipe_in, pipe_out, fds_to_close); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 947 | break; |
| 948 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 949 | #if defined (DPAREN_ARITHMETIC) |
| 950 | case cm_arith: |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 951 | was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 952 | if (ignore_return) |
| 953 | command->value.Arith->flags |= CMD_IGNORE_RETURN; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 954 | line_number_for_err_trap = save_line_number = line_number; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 955 | exec_result = execute_arith_command (command->value.Arith); |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 956 | line_number = save_line_number; |
| 957 | |
| 958 | if (was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS) |
| 959 | { |
| 960 | last_command_exit_value = exec_result; |
| 961 | save_line_number = line_number; |
| 962 | line_number = line_number_for_err_trap; |
| 963 | run_error_trap (); |
| 964 | line_number = save_line_number; |
| 965 | } |
| 966 | |
| 967 | if (ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS) |
| 968 | { |
| 969 | last_command_exit_value = exec_result; |
| 970 | run_pending_traps (); |
| 971 | jump_to_top_level (ERREXIT); |
| 972 | } |
| 973 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 974 | break; |
| 975 | #endif |
| 976 | |
| 977 | #if defined (COND_COMMAND) |
| 978 | case cm_cond: |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 979 | was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 980 | if (ignore_return) |
| 981 | command->value.Cond->flags |= CMD_IGNORE_RETURN; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 982 | |
| 983 | line_number_for_err_trap = save_line_number = line_number; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 984 | exec_result = execute_cond_command (command->value.Cond); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 985 | line_number = save_line_number; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 986 | |
| 987 | if (was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS) |
| 988 | { |
| 989 | last_command_exit_value = exec_result; |
| 990 | save_line_number = line_number; |
| 991 | line_number = line_number_for_err_trap; |
| 992 | run_error_trap (); |
| 993 | line_number = save_line_number; |
| 994 | } |
| 995 | |
| 996 | if (ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS) |
| 997 | { |
| 998 | last_command_exit_value = exec_result; |
| 999 | run_pending_traps (); |
| 1000 | jump_to_top_level (ERREXIT); |
| 1001 | } |
| 1002 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 1003 | break; |
| 1004 | #endif |
| 1005 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1006 | case cm_function_def: |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1007 | exec_result = execute_intern_function (command->value.Function_def->name, |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1008 | command->value.Function_def); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1009 | break; |
| 1010 | |
| 1011 | default: |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 1012 | command_error ("execute_command", CMDERR_BADTYPE, command->type, 0); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1013 | } |
| 1014 | |
| 1015 | if (my_undo_list) |
| 1016 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1017 | do_redirections (my_undo_list, RX_ACTIVE); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1018 | dispose_redirects (my_undo_list); |
| 1019 | } |
| 1020 | |
| 1021 | if (exec_undo_list) |
| 1022 | dispose_redirects (exec_undo_list); |
| 1023 | |
| 1024 | if (my_undo_list || exec_undo_list) |
| 1025 | discard_unwind_frame ("loop_redirections"); |
| 1026 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1027 | #if defined (PROCESS_SUBSTITUTION) |
| 1028 | if (saved_fifo) |
| 1029 | { |
| 1030 | nfifo = num_fifos (); |
| 1031 | if (nfifo > ofifo) |
| 1032 | close_new_fifos ((char *)ofifo_list, osize); |
| 1033 | free ((void *)ofifo_list); |
| 1034 | } |
| 1035 | #endif |
| 1036 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1037 | /* Invert the return value if we have to */ |
| 1038 | if (invert) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1039 | exec_result = (exec_result == EXECUTION_SUCCESS) |
| 1040 | ? EXECUTION_FAILURE |
| 1041 | : EXECUTION_SUCCESS; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1042 | |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 1043 | #if defined (DPAREN_ARITHMETIC) || defined (COND_COMMAND) |
| 1044 | /* This is where we set PIPESTATUS from the exit status of the appropriate |
| 1045 | compound commands (the ones that look enough like simple commands to |
| 1046 | cause confusion). We might be able to optimize by not doing this if |
| 1047 | subshell_environment != 0. */ |
| 1048 | switch (command->type) |
| 1049 | { |
| 1050 | # if defined (DPAREN_ARITHMETIC) |
| 1051 | case cm_arith: |
| 1052 | # endif |
| 1053 | # if defined (COND_COMMAND) |
| 1054 | case cm_cond: |
| 1055 | # endif |
| 1056 | set_pipestatus_from_exit (exec_result); |
| 1057 | break; |
| 1058 | } |
| 1059 | #endif |
| 1060 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1061 | last_command_exit_value = exec_result; |
| 1062 | run_pending_traps (); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1063 | #if 0 |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1064 | if (running_trap == 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1065 | #endif |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1066 | currently_executing_command = (COMMAND *)NULL; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1067 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1068 | return (last_command_exit_value); |
| 1069 | } |
| 1070 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1071 | #if defined (COMMAND_TIMING) |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1072 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1073 | #if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1074 | extern struct timeval *difftimeval __P((struct timeval *, struct timeval *, struct timeval *)); |
| 1075 | extern struct timeval *addtimeval __P((struct timeval *, struct timeval *, struct timeval *)); |
| 1076 | extern int timeval_to_cpu __P((struct timeval *, struct timeval *, struct timeval *)); |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1077 | #endif |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1078 | |
| 1079 | #define POSIX_TIMEFORMAT "real %2R\nuser %2U\nsys %2S" |
| 1080 | #define BASH_TIMEFORMAT "\nreal\t%3lR\nuser\t%3lU\nsys\t%3lS" |
| 1081 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1082 | static const int precs[] = { 0, 100, 10, 1 }; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1083 | |
| 1084 | /* Expand one `%'-prefixed escape sequence from a time format string. */ |
| 1085 | static int |
| 1086 | mkfmt (buf, prec, lng, sec, sec_fraction) |
| 1087 | char *buf; |
| 1088 | int prec, lng; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1089 | time_t sec; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1090 | int sec_fraction; |
| 1091 | { |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1092 | time_t min; |
| 1093 | char abuf[INT_STRLEN_BOUND(time_t) + 1]; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1094 | int ind, aind; |
| 1095 | |
| 1096 | ind = 0; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1097 | abuf[sizeof(abuf) - 1] = '\0'; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1098 | |
| 1099 | /* If LNG is non-zero, we want to decompose SEC into minutes and seconds. */ |
| 1100 | if (lng) |
| 1101 | { |
| 1102 | min = sec / 60; |
| 1103 | sec %= 60; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1104 | aind = sizeof(abuf) - 2; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1105 | do |
| 1106 | abuf[aind--] = (min % 10) + '0'; |
| 1107 | while (min /= 10); |
| 1108 | aind++; |
| 1109 | while (abuf[aind]) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 1110 | buf[ind++] = abuf[aind++]; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1111 | buf[ind++] = 'm'; |
| 1112 | } |
| 1113 | |
| 1114 | /* Now add the seconds. */ |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1115 | aind = sizeof (abuf) - 2; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1116 | do |
| 1117 | abuf[aind--] = (sec % 10) + '0'; |
| 1118 | while (sec /= 10); |
| 1119 | aind++; |
| 1120 | while (abuf[aind]) |
| 1121 | buf[ind++] = abuf[aind++]; |
| 1122 | |
| 1123 | /* We want to add a decimal point and PREC places after it if PREC is |
| 1124 | nonzero. PREC is not greater than 3. SEC_FRACTION is between 0 |
| 1125 | and 999. */ |
| 1126 | if (prec != 0) |
| 1127 | { |
| 1128 | buf[ind++] = '.'; |
| 1129 | for (aind = 1; aind <= prec; aind++) |
| 1130 | { |
| 1131 | buf[ind++] = (sec_fraction / precs[aind]) + '0'; |
| 1132 | sec_fraction %= precs[aind]; |
| 1133 | } |
| 1134 | } |
| 1135 | |
| 1136 | if (lng) |
| 1137 | buf[ind++] = 's'; |
| 1138 | buf[ind] = '\0'; |
| 1139 | |
| 1140 | return (ind); |
| 1141 | } |
| 1142 | |
| 1143 | /* Interpret the format string FORMAT, interpolating the following escape |
| 1144 | sequences: |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 1145 | %[prec][l][RUS] |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1146 | |
| 1147 | where the optional `prec' is a precision, meaning the number of |
| 1148 | characters after the decimal point, the optional `l' means to format |
| 1149 | using minutes and seconds (MMmNN[.FF]s), like the `times' builtin', |
| 1150 | and the last character is one of |
| 1151 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 1152 | R number of seconds of `real' time |
| 1153 | U number of seconds of `user' time |
| 1154 | S number of seconds of `system' time |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1155 | |
| 1156 | An occurrence of `%%' in the format string is translated to a `%'. The |
| 1157 | result is printed to FP, a pointer to a FILE. The other variables are |
| 1158 | the seconds and thousandths of a second of real, user, and system time, |
| 1159 | resectively. */ |
| 1160 | static void |
| 1161 | print_formatted_time (fp, format, rs, rsf, us, usf, ss, ssf, cpu) |
| 1162 | FILE *fp; |
| 1163 | char *format; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1164 | time_t rs; |
| 1165 | int rsf; |
| 1166 | time_t us; |
| 1167 | int usf; |
| 1168 | time_t ss; |
| 1169 | int ssf, cpu; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1170 | { |
| 1171 | int prec, lng, len; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1172 | char *str, *s, ts[INT_STRLEN_BOUND (time_t) + sizeof ("mSS.FFFF")]; |
| 1173 | time_t sum; |
Jari Aalto | e8ce775 | 1997-09-22 20:22:27 +0000 | [diff] [blame] | 1174 | int sum_frac; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1175 | int sindex, ssize; |
| 1176 | |
| 1177 | len = strlen (format); |
| 1178 | ssize = (len + 64) - (len % 64); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1179 | str = (char *)xmalloc (ssize); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1180 | sindex = 0; |
| 1181 | |
| 1182 | for (s = format; *s; s++) |
| 1183 | { |
| 1184 | if (*s != '%' || s[1] == '\0') |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 1185 | { |
| 1186 | RESIZE_MALLOCED_BUFFER (str, sindex, 1, ssize, 64); |
| 1187 | str[sindex++] = *s; |
| 1188 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1189 | else if (s[1] == '%') |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 1190 | { |
| 1191 | s++; |
| 1192 | RESIZE_MALLOCED_BUFFER (str, sindex, 1, ssize, 64); |
| 1193 | str[sindex++] = *s; |
| 1194 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1195 | else if (s[1] == 'P') |
| 1196 | { |
| 1197 | s++; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1198 | #if 0 |
| 1199 | /* clamp CPU usage at 100% */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1200 | if (cpu > 10000) |
| 1201 | cpu = 10000; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1202 | #endif |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1203 | sum = cpu / 100; |
| 1204 | sum_frac = (cpu % 100) * 10; |
| 1205 | len = mkfmt (ts, 2, 0, sum, sum_frac); |
| 1206 | RESIZE_MALLOCED_BUFFER (str, sindex, len, ssize, 64); |
| 1207 | strcpy (str + sindex, ts); |
| 1208 | sindex += len; |
| 1209 | } |
| 1210 | else |
| 1211 | { |
| 1212 | prec = 3; /* default is three places past the decimal point. */ |
| 1213 | lng = 0; /* default is to not use minutes or append `s' */ |
| 1214 | s++; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1215 | if (DIGIT (*s)) /* `precision' */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1216 | { |
| 1217 | prec = *s++ - '0'; |
| 1218 | if (prec > 3) prec = 3; |
| 1219 | } |
| 1220 | if (*s == 'l') /* `length extender' */ |
| 1221 | { |
| 1222 | lng = 1; |
| 1223 | s++; |
| 1224 | } |
| 1225 | if (*s == 'R' || *s == 'E') |
| 1226 | len = mkfmt (ts, prec, lng, rs, rsf); |
| 1227 | else if (*s == 'U') |
| 1228 | len = mkfmt (ts, prec, lng, us, usf); |
| 1229 | else if (*s == 'S') |
| 1230 | len = mkfmt (ts, prec, lng, ss, ssf); |
| 1231 | else |
| 1232 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1233 | internal_error (_("TIMEFORMAT: `%c': invalid format character"), *s); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1234 | free (str); |
| 1235 | return; |
| 1236 | } |
| 1237 | RESIZE_MALLOCED_BUFFER (str, sindex, len, ssize, 64); |
| 1238 | strcpy (str + sindex, ts); |
| 1239 | sindex += len; |
| 1240 | } |
| 1241 | } |
| 1242 | |
| 1243 | str[sindex] = '\0'; |
| 1244 | fprintf (fp, "%s\n", str); |
| 1245 | fflush (fp); |
| 1246 | |
| 1247 | free (str); |
| 1248 | } |
| 1249 | |
| 1250 | static int |
| 1251 | time_command (command, asynchronous, pipe_in, pipe_out, fds_to_close) |
| 1252 | COMMAND *command; |
| 1253 | int asynchronous, pipe_in, pipe_out; |
| 1254 | struct fd_bitmap *fds_to_close; |
| 1255 | { |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 1256 | int rv, posix_time, old_flags, nullcmd; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1257 | time_t rs, us, ss; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1258 | int rsf, usf, ssf; |
| 1259 | int cpu; |
| 1260 | char *time_format; |
| 1261 | |
| 1262 | #if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY) |
| 1263 | struct timeval real, user, sys; |
| 1264 | struct timeval before, after; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1265 | # if defined (HAVE_STRUCT_TIMEZONE) |
| 1266 | struct timezone dtz; /* posix doesn't define this */ |
| 1267 | # endif |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1268 | struct rusage selfb, selfa, kidsb, kidsa; /* a = after, b = before */ |
| 1269 | #else |
| 1270 | # if defined (HAVE_TIMES) |
| 1271 | clock_t tbefore, tafter, real, user, sys; |
| 1272 | struct tms before, after; |
| 1273 | # endif |
| 1274 | #endif |
| 1275 | |
| 1276 | #if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1277 | # if defined (HAVE_STRUCT_TIMEZONE) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1278 | gettimeofday (&before, &dtz); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1279 | # else |
| 1280 | gettimeofday (&before, (void *)NULL); |
| 1281 | # endif /* !HAVE_STRUCT_TIMEZONE */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1282 | getrusage (RUSAGE_SELF, &selfb); |
| 1283 | getrusage (RUSAGE_CHILDREN, &kidsb); |
| 1284 | #else |
| 1285 | # if defined (HAVE_TIMES) |
| 1286 | tbefore = times (&before); |
| 1287 | # endif |
| 1288 | #endif |
| 1289 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1290 | posix_time = command && (command->flags & CMD_TIME_POSIX); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1291 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 1292 | nullcmd = (command == 0) || (command->type == cm_simple && command->value.Simple->words == 0 && command->value.Simple->redirects == 0); |
| 1293 | if (posixly_correct && nullcmd) |
| 1294 | { |
| 1295 | #if defined (HAVE_GETRUSAGE) |
| 1296 | selfb.ru_utime.tv_sec = kidsb.ru_utime.tv_sec = selfb.ru_stime.tv_sec = kidsb.ru_stime.tv_sec = 0; |
| 1297 | selfb.ru_utime.tv_usec = kidsb.ru_utime.tv_usec = selfb.ru_stime.tv_usec = kidsb.ru_stime.tv_usec = 0; |
| 1298 | before.tv_sec = shell_start_time; |
| 1299 | before.tv_usec = 0; |
| 1300 | #else |
| 1301 | before.tms_utime = before.tms_stime = before.tms_cutime = before.tms_cstime = 0; |
| 1302 | tbefore = shell_start_time; |
| 1303 | #endif |
| 1304 | } |
| 1305 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 1306 | old_flags = command->flags; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1307 | command->flags &= ~(CMD_TIME_PIPELINE|CMD_TIME_POSIX); |
| 1308 | rv = execute_command_internal (command, asynchronous, pipe_in, pipe_out, fds_to_close); |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 1309 | command->flags = old_flags; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1310 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1311 | rs = us = ss = 0; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 1312 | rsf = usf = ssf = cpu = 0; |
| 1313 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1314 | #if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1315 | # if defined (HAVE_STRUCT_TIMEZONE) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1316 | gettimeofday (&after, &dtz); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1317 | # else |
| 1318 | gettimeofday (&after, (void *)NULL); |
| 1319 | # endif /* !HAVE_STRUCT_TIMEZONE */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1320 | getrusage (RUSAGE_SELF, &selfa); |
| 1321 | getrusage (RUSAGE_CHILDREN, &kidsa); |
| 1322 | |
| 1323 | difftimeval (&real, &before, &after); |
| 1324 | timeval_to_secs (&real, &rs, &rsf); |
| 1325 | |
| 1326 | addtimeval (&user, difftimeval(&after, &selfb.ru_utime, &selfa.ru_utime), |
| 1327 | difftimeval(&before, &kidsb.ru_utime, &kidsa.ru_utime)); |
| 1328 | timeval_to_secs (&user, &us, &usf); |
| 1329 | |
| 1330 | addtimeval (&sys, difftimeval(&after, &selfb.ru_stime, &selfa.ru_stime), |
| 1331 | difftimeval(&before, &kidsb.ru_stime, &kidsa.ru_stime)); |
| 1332 | timeval_to_secs (&sys, &ss, &ssf); |
| 1333 | |
| 1334 | cpu = timeval_to_cpu (&real, &user, &sys); |
| 1335 | #else |
| 1336 | # if defined (HAVE_TIMES) |
| 1337 | tafter = times (&after); |
| 1338 | |
| 1339 | real = tafter - tbefore; |
| 1340 | clock_t_to_secs (real, &rs, &rsf); |
| 1341 | |
| 1342 | user = (after.tms_utime - before.tms_utime) + (after.tms_cutime - before.tms_cutime); |
| 1343 | clock_t_to_secs (user, &us, &usf); |
| 1344 | |
| 1345 | sys = (after.tms_stime - before.tms_stime) + (after.tms_cstime - before.tms_cstime); |
| 1346 | clock_t_to_secs (sys, &ss, &ssf); |
| 1347 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 1348 | cpu = (real == 0) ? 0 : ((user + sys) * 10000) / real; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1349 | |
| 1350 | # else |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1351 | rs = us = ss = 0; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1352 | rsf = usf = ssf = cpu = 0; |
| 1353 | # endif |
| 1354 | #endif |
| 1355 | |
| 1356 | if (posix_time) |
| 1357 | time_format = POSIX_TIMEFORMAT; |
| 1358 | else if ((time_format = get_string_value ("TIMEFORMAT")) == 0) |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 1359 | { |
| 1360 | if (posixly_correct && nullcmd) |
| 1361 | time_format = "user\t%2lU\nsys\t%2lS"; |
| 1362 | else |
| 1363 | time_format = BASH_TIMEFORMAT; |
| 1364 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1365 | if (time_format && *time_format) |
| 1366 | print_formatted_time (stderr, time_format, rs, rsf, us, usf, ss, ssf, cpu); |
| 1367 | |
| 1368 | return rv; |
| 1369 | } |
| 1370 | #endif /* COMMAND_TIMING */ |
| 1371 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1372 | /* Execute a command that's supposed to be in a subshell. This must be |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1373 | called after make_child and we must be running in the child process. |
| 1374 | The caller will return or exit() immediately with the value this returns. */ |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1375 | static int |
| 1376 | execute_in_subshell (command, asynchronous, pipe_in, pipe_out, fds_to_close) |
| 1377 | COMMAND *command; |
| 1378 | int asynchronous; |
| 1379 | int pipe_in, pipe_out; |
| 1380 | struct fd_bitmap *fds_to_close; |
| 1381 | { |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1382 | int user_subshell, return_code, function_value, should_redir_stdin, invert; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1383 | int ois, user_coproc; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 1384 | int result; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 1385 | volatile COMMAND *tcom; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1386 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1387 | USE_VAR(user_subshell); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1388 | USE_VAR(user_coproc); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1389 | USE_VAR(invert); |
| 1390 | USE_VAR(tcom); |
| 1391 | USE_VAR(asynchronous); |
| 1392 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1393 | subshell_level++; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1394 | should_redir_stdin = (asynchronous && (command->flags & CMD_STDIN_REDIR) && |
| 1395 | pipe_in == NO_PIPE && |
| 1396 | stdin_redirects (command->redirects) == 0); |
| 1397 | |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1398 | invert = (command->flags & CMD_INVERT_RETURN) != 0; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1399 | user_subshell = command->type == cm_subshell || ((command->flags & CMD_WANT_SUBSHELL) != 0); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1400 | user_coproc = command->type == cm_coproc; |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1401 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1402 | command->flags &= ~(CMD_FORCE_SUBSHELL | CMD_WANT_SUBSHELL | CMD_INVERT_RETURN); |
| 1403 | |
| 1404 | /* If a command is asynchronous in a subshell (like ( foo ) & or |
| 1405 | the special case of an asynchronous GROUP command where the |
| 1406 | the subshell bit is turned on down in case cm_group: below), |
| 1407 | turn off `asynchronous', so that two subshells aren't spawned. |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 1408 | XXX - asynchronous used to be set to 0 in this block, but that |
| 1409 | means that setup_async_signals was never run. Now it's set to |
| 1410 | 0 after subshell_environment is set appropriately and setup_async_signals |
| 1411 | is run. |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1412 | |
| 1413 | This seems semantically correct to me. For example, |
| 1414 | ( foo ) & seems to say ``do the command `foo' in a subshell |
| 1415 | environment, but don't wait for that subshell to finish'', |
| 1416 | and "{ foo ; bar ; } &" seems to me to be like functions or |
| 1417 | builtins in the background, which executed in a subshell |
| 1418 | environment. I just don't see the need to fork two subshells. */ |
| 1419 | |
| 1420 | /* Don't fork again, we are already in a subshell. A `doubly |
| 1421 | async' shell is not interactive, however. */ |
| 1422 | if (asynchronous) |
| 1423 | { |
| 1424 | #if defined (JOB_CONTROL) |
| 1425 | /* If a construct like ( exec xxx yyy ) & is given while job |
| 1426 | control is active, we want to prevent exec from putting the |
| 1427 | subshell back into the original process group, carefully |
| 1428 | undoing all the work we just did in make_child. */ |
| 1429 | original_pgrp = -1; |
| 1430 | #endif /* JOB_CONTROL */ |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1431 | ois = interactive_shell; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1432 | interactive_shell = 0; |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1433 | /* This test is to prevent alias expansion by interactive shells that |
| 1434 | run `(command) &' but to allow scripts that have enabled alias |
| 1435 | expansion with `shopt -s expand_alias' to continue to expand |
| 1436 | aliases. */ |
| 1437 | if (ois != interactive_shell) |
| 1438 | expand_aliases = 0; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1439 | } |
| 1440 | |
| 1441 | /* Subshells are neither login nor interactive. */ |
| 1442 | login_shell = interactive = 0; |
| 1443 | |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 1444 | if (user_subshell) |
| 1445 | subshell_environment = SUBSHELL_PAREN; |
| 1446 | else |
| 1447 | { |
| 1448 | subshell_environment = 0; /* XXX */ |
| 1449 | if (asynchronous) |
| 1450 | subshell_environment |= SUBSHELL_ASYNC; |
| 1451 | if (pipe_in != NO_PIPE || pipe_out != NO_PIPE) |
| 1452 | subshell_environment |= SUBSHELL_PIPE; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1453 | if (user_coproc) |
| 1454 | subshell_environment |= SUBSHELL_COPROC; |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 1455 | } |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1456 | |
| 1457 | reset_terminating_signals (); /* in sig.c */ |
| 1458 | /* Cancel traps, in trap.c. */ |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 1459 | /* Reset the signal handlers in the child, but don't free the |
| 1460 | trap strings. Set a flag noting that we have to free the |
| 1461 | trap strings if we run trap to change a signal disposition. */ |
| 1462 | reset_signal_handlers (); |
| 1463 | subshell_environment |= SUBSHELL_RESETTRAP; |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 1464 | |
| 1465 | /* Make sure restore_original_signals doesn't undo the work done by |
| 1466 | make_child to ensure that asynchronous children are immune to SIGINT |
| 1467 | and SIGQUIT. Turn off asynchronous to make sure more subshells are |
| 1468 | not spawned. */ |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1469 | if (asynchronous) |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 1470 | { |
| 1471 | setup_async_signals (); |
| 1472 | asynchronous = 0; |
| 1473 | } |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1474 | |
| 1475 | #if defined (JOB_CONTROL) |
| 1476 | set_sigchld_handler (); |
| 1477 | #endif /* JOB_CONTROL */ |
| 1478 | |
| 1479 | set_sigint_handler (); |
| 1480 | |
| 1481 | #if defined (JOB_CONTROL) |
| 1482 | /* Delete all traces that there were any jobs running. This is |
| 1483 | only for subshells. */ |
| 1484 | without_job_control (); |
| 1485 | #endif /* JOB_CONTROL */ |
| 1486 | |
| 1487 | if (fds_to_close) |
| 1488 | close_fd_bitmap (fds_to_close); |
| 1489 | |
| 1490 | do_piping (pipe_in, pipe_out); |
| 1491 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1492 | #if defined (COPROCESS_SUPPORT) |
| 1493 | coproc_closeall (); |
| 1494 | #endif |
| 1495 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1496 | /* If this is a user subshell, set a flag if stdin was redirected. |
| 1497 | This is used later to decide whether to redirect fd 0 to |
| 1498 | /dev/null for async commands in the subshell. This adds more |
| 1499 | sh compatibility, but I'm not sure it's the right thing to do. */ |
| 1500 | if (user_subshell) |
| 1501 | { |
| 1502 | stdin_redir = stdin_redirects (command->redirects); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1503 | restore_default_signal (EXIT_TRAP); |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1504 | } |
| 1505 | |
| 1506 | /* If this is an asynchronous command (command &), we want to |
| 1507 | redirect the standard input from /dev/null in the absence of |
| 1508 | any specific redirection involving stdin. */ |
| 1509 | if (should_redir_stdin && stdin_redir == 0) |
| 1510 | async_redirect_stdin (); |
| 1511 | |
| 1512 | /* Do redirections, then dispose of them before recursive call. */ |
| 1513 | if (command->redirects) |
| 1514 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1515 | if (do_redirections (command->redirects, RX_ACTIVE) != 0) |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1516 | exit (invert ? EXECUTION_SUCCESS : EXECUTION_FAILURE); |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1517 | |
| 1518 | dispose_redirects (command->redirects); |
| 1519 | command->redirects = (REDIRECT *)NULL; |
| 1520 | } |
| 1521 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1522 | if (command->type == cm_subshell) |
| 1523 | tcom = command->value.Subshell->command; |
| 1524 | else if (user_coproc) |
| 1525 | tcom = command->value.Coproc->command; |
| 1526 | else |
| 1527 | tcom = command; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1528 | |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 1529 | if (command->flags & CMD_TIME_PIPELINE) |
| 1530 | tcom->flags |= CMD_TIME_PIPELINE; |
| 1531 | if (command->flags & CMD_TIME_POSIX) |
| 1532 | tcom->flags |= CMD_TIME_POSIX; |
| 1533 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 1534 | /* Make sure the subshell inherits any CMD_IGNORE_RETURN flag. */ |
| 1535 | if ((command->flags & CMD_IGNORE_RETURN) && tcom != command) |
| 1536 | tcom->flags |= CMD_IGNORE_RETURN; |
| 1537 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1538 | /* If this is a simple command, tell execute_disk_command that it |
| 1539 | might be able to get away without forking and simply exec. |
| 1540 | This means things like ( sleep 10 ) will only cause one fork. |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1541 | If we're timing the command or inverting its return value, however, |
| 1542 | we cannot do this optimization. */ |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1543 | if ((user_subshell || user_coproc) && (tcom->type == cm_simple || tcom->type == cm_subshell) && |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1544 | ((tcom->flags & CMD_TIME_PIPELINE) == 0) && |
| 1545 | ((tcom->flags & CMD_INVERT_RETURN) == 0)) |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1546 | { |
| 1547 | tcom->flags |= CMD_NO_FORK; |
| 1548 | if (tcom->type == cm_simple) |
| 1549 | tcom->value.Simple->flags |= CMD_NO_FORK; |
| 1550 | } |
| 1551 | |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1552 | invert = (tcom->flags & CMD_INVERT_RETURN) != 0; |
| 1553 | tcom->flags &= ~CMD_INVERT_RETURN; |
| 1554 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1555 | result = setjmp_nosigs (top_level); |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 1556 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1557 | /* If we're inside a function while executing this subshell, we |
| 1558 | need to handle a possible `return'. */ |
| 1559 | function_value = 0; |
| 1560 | if (return_catch_flag) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1561 | function_value = setjmp_nosigs (return_catch); |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1562 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 1563 | /* If we're going to exit the shell, we don't want to invert the return |
| 1564 | status. */ |
| 1565 | if (result == EXITPROG) |
| 1566 | invert = 0, return_code = last_command_exit_value; |
| 1567 | else if (result) |
| 1568 | return_code = EXECUTION_FAILURE; |
| 1569 | else if (function_value) |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1570 | return_code = return_catch_value; |
| 1571 | else |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1572 | return_code = execute_command_internal ((COMMAND *)tcom, asynchronous, NO_PIPE, NO_PIPE, fds_to_close); |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1573 | |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1574 | /* If we are asked to, invert the return value. */ |
| 1575 | if (invert) |
| 1576 | return_code = (return_code == EXECUTION_SUCCESS) ? EXECUTION_FAILURE |
| 1577 | : EXECUTION_SUCCESS; |
| 1578 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1579 | /* If we were explicitly placed in a subshell with (), we need |
| 1580 | to do the `shell cleanup' things, such as running traps[0]. */ |
| 1581 | if (user_subshell && signal_is_trapped (0)) |
| 1582 | { |
| 1583 | last_command_exit_value = return_code; |
| 1584 | return_code = run_exit_trap (); |
| 1585 | } |
| 1586 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 1587 | subshell_level--; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 1588 | return (return_code); |
| 1589 | /* NOTREACHED */ |
| 1590 | } |
| 1591 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1592 | #if defined (COPROCESS_SUPPORT) |
| 1593 | #define COPROC_MAX 16 |
| 1594 | |
| 1595 | typedef struct cpelement |
| 1596 | { |
| 1597 | struct cpelement *next; |
| 1598 | struct coproc *coproc; |
| 1599 | } |
| 1600 | cpelement_t; |
| 1601 | |
| 1602 | typedef struct cplist |
| 1603 | { |
| 1604 | struct cpelement *head; |
| 1605 | struct cpelement *tail; |
| 1606 | int ncoproc; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1607 | int lock; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1608 | } |
| 1609 | cplist_t; |
| 1610 | |
| 1611 | static struct cpelement *cpe_alloc __P((struct coproc *)); |
| 1612 | static void cpe_dispose __P((struct cpelement *)); |
| 1613 | static struct cpelement *cpl_add __P((struct coproc *)); |
| 1614 | static struct cpelement *cpl_delete __P((pid_t)); |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1615 | static void cpl_reap __P((void)); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1616 | static void cpl_flush __P((void)); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1617 | static void cpl_closeall __P((void)); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1618 | static struct cpelement *cpl_search __P((pid_t)); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1619 | static struct cpelement *cpl_searchbyname __P((const char *)); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1620 | static void cpl_prune __P((void)); |
| 1621 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1622 | static void coproc_free __P((struct coproc *)); |
| 1623 | |
| 1624 | /* Will go away when there is fully-implemented support for multiple coprocs. */ |
| 1625 | Coproc sh_coproc = { 0, NO_PID, -1, -1, 0, 0, 0, 0, 0 }; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1626 | |
| 1627 | cplist_t coproc_list = {0, 0, 0}; |
| 1628 | |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1629 | /* Functions to manage the list of coprocs */ |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1630 | |
| 1631 | static struct cpelement * |
| 1632 | cpe_alloc (cp) |
| 1633 | Coproc *cp; |
| 1634 | { |
| 1635 | struct cpelement *cpe; |
| 1636 | |
| 1637 | cpe = (struct cpelement *)xmalloc (sizeof (struct cpelement)); |
| 1638 | cpe->coproc = cp; |
| 1639 | cpe->next = (struct cpelement *)0; |
| 1640 | return cpe; |
| 1641 | } |
| 1642 | |
| 1643 | static void |
| 1644 | cpe_dispose (cpe) |
| 1645 | struct cpelement *cpe; |
| 1646 | { |
| 1647 | free (cpe); |
| 1648 | } |
| 1649 | |
| 1650 | static struct cpelement * |
| 1651 | cpl_add (cp) |
| 1652 | Coproc *cp; |
| 1653 | { |
| 1654 | struct cpelement *cpe; |
| 1655 | |
| 1656 | cpe = cpe_alloc (cp); |
| 1657 | |
| 1658 | if (coproc_list.head == 0) |
| 1659 | { |
| 1660 | coproc_list.head = coproc_list.tail = cpe; |
| 1661 | coproc_list.ncoproc = 0; /* just to make sure */ |
| 1662 | } |
| 1663 | else |
| 1664 | { |
| 1665 | coproc_list.tail->next = cpe; |
| 1666 | coproc_list.tail = cpe; |
| 1667 | } |
| 1668 | coproc_list.ncoproc++; |
| 1669 | |
| 1670 | return cpe; |
| 1671 | } |
| 1672 | |
| 1673 | static struct cpelement * |
| 1674 | cpl_delete (pid) |
| 1675 | pid_t pid; |
| 1676 | { |
| 1677 | struct cpelement *prev, *p; |
| 1678 | |
| 1679 | for (prev = p = coproc_list.head; p; prev = p, p = p->next) |
| 1680 | if (p->coproc->c_pid == pid) |
| 1681 | { |
| 1682 | prev->next = p->next; /* remove from list */ |
| 1683 | break; |
| 1684 | } |
| 1685 | |
| 1686 | if (p == 0) |
| 1687 | return 0; /* not found */ |
| 1688 | |
| 1689 | #if defined (DEBUG) |
| 1690 | itrace("cpl_delete: deleting %d", pid); |
| 1691 | #endif |
| 1692 | |
| 1693 | /* Housekeeping in the border cases. */ |
| 1694 | if (p == coproc_list.head) |
| 1695 | coproc_list.head = coproc_list.head->next; |
| 1696 | else if (p == coproc_list.tail) |
| 1697 | coproc_list.tail = prev; |
| 1698 | |
| 1699 | coproc_list.ncoproc--; |
| 1700 | if (coproc_list.ncoproc == 0) |
| 1701 | coproc_list.head = coproc_list.tail = 0; |
| 1702 | else if (coproc_list.ncoproc == 1) |
| 1703 | coproc_list.tail = coproc_list.head; /* just to make sure */ |
| 1704 | |
| 1705 | return (p); |
| 1706 | } |
| 1707 | |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1708 | static void |
| 1709 | cpl_reap () |
| 1710 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1711 | struct cpelement *p, *next, *nh, *nt; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1712 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1713 | /* Build a new list by removing dead coprocs and fix up the coproc_list |
| 1714 | pointers when done. */ |
| 1715 | nh = nt = next = (struct cpelement *)0; |
| 1716 | for (p = coproc_list.head; p; p = next) |
| 1717 | { |
| 1718 | next = p->next; |
| 1719 | if (p->coproc->c_flags & COPROC_DEAD) |
| 1720 | { |
| 1721 | coproc_list.ncoproc--; /* keep running count, fix up pointers later */ |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1722 | |
| 1723 | #if defined (DEBUG) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1724 | itrace("cpl_reap: deleting %d", p->coproc->c_pid); |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1725 | #endif |
| 1726 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1727 | coproc_dispose (p->coproc); |
| 1728 | cpe_dispose (p); |
| 1729 | } |
| 1730 | else if (nh == 0) |
| 1731 | nh = nt = p; |
| 1732 | else |
| 1733 | { |
| 1734 | nt->next = p; |
| 1735 | nt = nt->next; |
| 1736 | } |
| 1737 | } |
| 1738 | |
| 1739 | if (coproc_list.ncoproc == 0) |
| 1740 | coproc_list.head = coproc_list.tail = 0; |
| 1741 | else |
| 1742 | { |
| 1743 | if (nt) |
| 1744 | nt->next = 0; |
| 1745 | coproc_list.head = nh; |
| 1746 | coproc_list.tail = nt; |
| 1747 | if (coproc_list.ncoproc == 1) |
| 1748 | coproc_list.tail = coproc_list.head; /* just to make sure */ |
| 1749 | } |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1750 | } |
| 1751 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1752 | /* Clear out the list of saved statuses */ |
| 1753 | static void |
| 1754 | cpl_flush () |
| 1755 | { |
| 1756 | struct cpelement *cpe, *p; |
| 1757 | |
| 1758 | for (cpe = coproc_list.head; cpe; ) |
| 1759 | { |
| 1760 | p = cpe; |
| 1761 | cpe = cpe->next; |
| 1762 | |
| 1763 | coproc_dispose (p->coproc); |
| 1764 | cpe_dispose (p); |
| 1765 | } |
| 1766 | |
| 1767 | coproc_list.head = coproc_list.tail = 0; |
| 1768 | coproc_list.ncoproc = 0; |
| 1769 | } |
| 1770 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1771 | static void |
| 1772 | cpl_closeall () |
| 1773 | { |
| 1774 | struct cpelement *cpe; |
| 1775 | |
| 1776 | for (cpe = coproc_list.head; cpe; cpe = cpe->next) |
| 1777 | coproc_close (cpe->coproc); |
| 1778 | } |
| 1779 | |
| 1780 | static void |
| 1781 | cpl_fdchk (fd) |
| 1782 | int fd; |
| 1783 | { |
| 1784 | struct cpelement *cpe; |
| 1785 | |
| 1786 | for (cpe = coproc_list.head; cpe; cpe = cpe->next) |
| 1787 | coproc_checkfd (cpe->coproc, fd); |
| 1788 | } |
| 1789 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1790 | /* Search for PID in the list of coprocs; return the cpelement struct if |
| 1791 | found. If not found, return NULL. */ |
| 1792 | static struct cpelement * |
| 1793 | cpl_search (pid) |
| 1794 | pid_t pid; |
| 1795 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1796 | struct cpelement *cpe; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1797 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1798 | for (cpe = coproc_list.head ; cpe; cpe = cpe->next) |
| 1799 | if (cpe->coproc->c_pid == pid) |
| 1800 | return cpe; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1801 | return (struct cpelement *)NULL; |
| 1802 | } |
| 1803 | |
| 1804 | /* Search for the coproc named NAME in the list of coprocs; return the |
| 1805 | cpelement struct if found. If not found, return NULL. */ |
| 1806 | static struct cpelement * |
| 1807 | cpl_searchbyname (name) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1808 | const char *name; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1809 | { |
| 1810 | struct cpelement *cp; |
| 1811 | |
| 1812 | for (cp = coproc_list.head ; cp; cp = cp->next) |
| 1813 | if (STREQ (cp->coproc->c_name, name)) |
| 1814 | return cp; |
| 1815 | return (struct cpelement *)NULL; |
| 1816 | } |
| 1817 | |
| 1818 | #if 0 |
| 1819 | static void |
| 1820 | cpl_prune () |
| 1821 | { |
| 1822 | struct cpelement *cp; |
| 1823 | |
| 1824 | while (coproc_list.head && coproc_list.ncoproc > COPROC_MAX) |
| 1825 | { |
| 1826 | cp = coproc_list.head; |
| 1827 | coproc_list.head = coproc_list.head->next; |
| 1828 | coproc_dispose (cp->coproc); |
| 1829 | cpe_dispose (cp); |
| 1830 | coproc_list.ncoproc--; |
| 1831 | } |
| 1832 | } |
| 1833 | #endif |
| 1834 | |
| 1835 | /* These currently use a single global "shell coproc" but are written in a |
| 1836 | way to not preclude additional coprocs later (using the list management |
| 1837 | package above). */ |
| 1838 | |
| 1839 | struct coproc * |
| 1840 | getcoprocbypid (pid) |
| 1841 | pid_t pid; |
| 1842 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1843 | #if MULTIPLE_COPROCS |
| 1844 | struct cpelement *p; |
| 1845 | |
| 1846 | p = cpl_search (pid); |
| 1847 | return (p ? p->coproc : 0); |
| 1848 | #else |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1849 | return (pid == sh_coproc.c_pid ? &sh_coproc : 0); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1850 | #endif |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1851 | } |
| 1852 | |
| 1853 | struct coproc * |
| 1854 | getcoprocbyname (name) |
| 1855 | const char *name; |
| 1856 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1857 | #if MULTIPLE_COPROCS |
| 1858 | struct cpelement *p; |
| 1859 | |
| 1860 | p = cpl_searchbyname (name); |
| 1861 | return (p ? p->coproc : 0); |
| 1862 | #else |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1863 | return ((sh_coproc.c_name && STREQ (sh_coproc.c_name, name)) ? &sh_coproc : 0); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1864 | #endif |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1865 | } |
| 1866 | |
| 1867 | void |
| 1868 | coproc_init (cp) |
| 1869 | struct coproc *cp; |
| 1870 | { |
| 1871 | cp->c_name = 0; |
| 1872 | cp->c_pid = NO_PID; |
| 1873 | cp->c_rfd = cp->c_wfd = -1; |
| 1874 | cp->c_rsave = cp->c_wsave = -1; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1875 | cp->c_flags = cp->c_status = cp->c_lock = 0; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1876 | } |
| 1877 | |
| 1878 | struct coproc * |
| 1879 | coproc_alloc (name, pid) |
| 1880 | char *name; |
| 1881 | pid_t pid; |
| 1882 | { |
| 1883 | struct coproc *cp; |
| 1884 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1885 | #if MULTIPLE_COPROCS |
| 1886 | cp = (struct coproc *)xmalloc (sizeof (struct coproc)); |
| 1887 | #else |
| 1888 | cp = &sh_coproc; |
| 1889 | #endif |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1890 | coproc_init (cp); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1891 | cp->c_lock = 2; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1892 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1893 | cp->c_pid = pid; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1894 | cp->c_name = savestring (name); |
| 1895 | #if MULTIPLE_COPROCS |
| 1896 | cpl_add (cp); |
| 1897 | #endif |
| 1898 | cp->c_lock = 0; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1899 | return (cp); |
| 1900 | } |
| 1901 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1902 | static void |
| 1903 | coproc_free (cp) |
| 1904 | struct coproc *cp; |
| 1905 | { |
| 1906 | free (cp); |
| 1907 | } |
| 1908 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1909 | void |
| 1910 | coproc_dispose (cp) |
| 1911 | struct coproc *cp; |
| 1912 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1913 | sigset_t set, oset; |
| 1914 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1915 | if (cp == 0) |
| 1916 | return; |
| 1917 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1918 | BLOCK_SIGNAL (SIGCHLD, set, oset); |
| 1919 | cp->c_lock = 3; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1920 | coproc_unsetvars (cp); |
| 1921 | FREE (cp->c_name); |
| 1922 | coproc_close (cp); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1923 | #if MULTIPLE_COPROCS |
| 1924 | coproc_free (cp); |
| 1925 | #else |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1926 | coproc_init (cp); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1927 | cp->c_lock = 0; |
| 1928 | #endif |
| 1929 | UNBLOCK_SIGNAL (oset); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1930 | } |
| 1931 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1932 | /* Placeholder for now. Will require changes for multiple coprocs */ |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1933 | void |
| 1934 | coproc_flush () |
| 1935 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1936 | #if MULTIPLE_COPROCS |
| 1937 | cpl_flush (); |
| 1938 | #else |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1939 | coproc_dispose (&sh_coproc); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1940 | #endif |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1941 | } |
| 1942 | |
| 1943 | void |
| 1944 | coproc_close (cp) |
| 1945 | struct coproc *cp; |
| 1946 | { |
| 1947 | if (cp->c_rfd >= 0) |
| 1948 | { |
| 1949 | close (cp->c_rfd); |
| 1950 | cp->c_rfd = -1; |
| 1951 | } |
| 1952 | if (cp->c_wfd >= 0) |
| 1953 | { |
| 1954 | close (cp->c_wfd); |
| 1955 | cp->c_wfd = -1; |
| 1956 | } |
| 1957 | cp->c_rsave = cp->c_wsave = -1; |
| 1958 | } |
| 1959 | |
| 1960 | void |
| 1961 | coproc_closeall () |
| 1962 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1963 | #if MULTIPLE_COPROCS |
| 1964 | cpl_closeall (); |
| 1965 | #else |
| 1966 | coproc_close (&sh_coproc); /* XXX - will require changes for multiple coprocs */ |
| 1967 | #endif |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1968 | } |
| 1969 | |
| 1970 | void |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1971 | coproc_reap () |
| 1972 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1973 | #if MULTIPLE_COPROCS |
| 1974 | cpl_reap (); |
| 1975 | #else |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1976 | struct coproc *cp; |
| 1977 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1978 | cp = &sh_coproc; /* XXX - will require changes for multiple coprocs */ |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1979 | if (cp && (cp->c_flags & COPROC_DEAD)) |
| 1980 | coproc_dispose (cp); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 1981 | #endif |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 1982 | } |
| 1983 | |
| 1984 | void |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 1985 | coproc_rclose (cp, fd) |
| 1986 | struct coproc *cp; |
| 1987 | int fd; |
| 1988 | { |
| 1989 | if (cp->c_rfd >= 0 && cp->c_rfd == fd) |
| 1990 | { |
| 1991 | close (cp->c_rfd); |
| 1992 | cp->c_rfd = -1; |
| 1993 | } |
| 1994 | } |
| 1995 | |
| 1996 | void |
| 1997 | coproc_wclose (cp, fd) |
| 1998 | struct coproc *cp; |
| 1999 | int fd; |
| 2000 | { |
| 2001 | if (cp->c_wfd >= 0 && cp->c_wfd == fd) |
| 2002 | { |
| 2003 | close (cp->c_wfd); |
| 2004 | cp->c_wfd = -1; |
| 2005 | } |
| 2006 | } |
| 2007 | |
| 2008 | void |
| 2009 | coproc_checkfd (cp, fd) |
| 2010 | struct coproc *cp; |
| 2011 | int fd; |
| 2012 | { |
| 2013 | int update; |
| 2014 | |
| 2015 | update = 0; |
| 2016 | if (cp->c_rfd >= 0 && cp->c_rfd == fd) |
| 2017 | update = cp->c_rfd = -1; |
| 2018 | if (cp->c_wfd >= 0 && cp->c_wfd == fd) |
| 2019 | update = cp->c_wfd = -1; |
| 2020 | if (update) |
| 2021 | coproc_setvars (cp); |
| 2022 | } |
| 2023 | |
| 2024 | void |
| 2025 | coproc_fdchk (fd) |
| 2026 | int fd; |
| 2027 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2028 | #if MULTIPLE_COPROCS |
| 2029 | cpl_fdchk (fd); |
| 2030 | #else |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2031 | coproc_checkfd (&sh_coproc, fd); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2032 | #endif |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2033 | } |
| 2034 | |
| 2035 | void |
| 2036 | coproc_fdclose (cp, fd) |
| 2037 | struct coproc *cp; |
| 2038 | int fd; |
| 2039 | { |
| 2040 | coproc_rclose (cp, fd); |
| 2041 | coproc_wclose (cp, fd); |
| 2042 | coproc_setvars (cp); |
| 2043 | } |
| 2044 | |
| 2045 | void |
| 2046 | coproc_fdsave (cp) |
| 2047 | struct coproc *cp; |
| 2048 | { |
| 2049 | cp->c_rsave = cp->c_rfd; |
| 2050 | cp->c_wsave = cp->c_wfd; |
| 2051 | } |
| 2052 | |
| 2053 | void |
| 2054 | coproc_fdrestore (cp) |
| 2055 | struct coproc *cp; |
| 2056 | { |
| 2057 | cp->c_rfd = cp->c_rsave; |
| 2058 | cp->c_wfd = cp->c_wsave; |
| 2059 | } |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 2060 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2061 | void |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 2062 | coproc_pidchk (pid, status) |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2063 | pid_t pid; |
| 2064 | { |
| 2065 | struct coproc *cp; |
| 2066 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2067 | #if MULTIPLE_COPROCS |
| 2068 | struct cpelement *cpe; |
| 2069 | |
| 2070 | cpe = cpl_delete (pid); |
| 2071 | cp = cpe ? cpe->coproc : 0; |
| 2072 | #else |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2073 | cp = getcoprocbypid (pid); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2074 | #endif |
| 2075 | if (cp) |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 2076 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2077 | cp->c_lock = 4; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 2078 | cp->c_status = status; |
| 2079 | cp->c_flags |= COPROC_DEAD; |
| 2080 | cp->c_flags &= ~COPROC_RUNNING; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2081 | /* Don't dispose the coproc or unset the COPROC_XXX variables because |
| 2082 | this is executed in a signal handler context. Wait until coproc_reap |
| 2083 | takes care of it. */ |
| 2084 | cp->c_lock = 0; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 2085 | } |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2086 | } |
| 2087 | |
| 2088 | void |
| 2089 | coproc_setvars (cp) |
| 2090 | struct coproc *cp; |
| 2091 | { |
| 2092 | SHELL_VAR *v; |
| 2093 | char *namevar, *t; |
| 2094 | int l; |
| 2095 | #if defined (ARRAY_VARS) |
| 2096 | arrayind_t ind; |
| 2097 | #endif |
| 2098 | |
| 2099 | if (cp->c_name == 0) |
| 2100 | return; |
| 2101 | |
| 2102 | l = strlen (cp->c_name); |
| 2103 | namevar = xmalloc (l + 16); |
| 2104 | |
| 2105 | #if defined (ARRAY_VARS) |
| 2106 | v = find_variable (cp->c_name); |
| 2107 | if (v == 0) |
| 2108 | v = make_new_array_variable (cp->c_name); |
| 2109 | if (array_p (v) == 0) |
| 2110 | v = convert_var_to_array (v); |
| 2111 | |
| 2112 | t = itos (cp->c_rfd); |
| 2113 | ind = 0; |
| 2114 | v = bind_array_variable (cp->c_name, ind, t, 0); |
| 2115 | free (t); |
| 2116 | |
| 2117 | t = itos (cp->c_wfd); |
| 2118 | ind = 1; |
| 2119 | bind_array_variable (cp->c_name, ind, t, 0); |
| 2120 | free (t); |
| 2121 | #else |
| 2122 | sprintf (namevar, "%s_READ", cp->c_name); |
| 2123 | t = itos (cp->c_rfd); |
| 2124 | bind_variable (namevar, t, 0); |
| 2125 | free (t); |
| 2126 | sprintf (namevar, "%s_WRITE", cp->c_name); |
| 2127 | t = itos (cp->c_wfd); |
| 2128 | bind_variable (namevar, t, 0); |
| 2129 | free (t); |
| 2130 | #endif |
| 2131 | |
| 2132 | sprintf (namevar, "%s_PID", cp->c_name); |
| 2133 | t = itos (cp->c_pid); |
| 2134 | bind_variable (namevar, t, 0); |
| 2135 | free (t); |
| 2136 | |
| 2137 | free (namevar); |
| 2138 | } |
| 2139 | |
| 2140 | void |
| 2141 | coproc_unsetvars (cp) |
| 2142 | struct coproc *cp; |
| 2143 | { |
| 2144 | int l; |
| 2145 | char *namevar; |
| 2146 | |
| 2147 | if (cp->c_name == 0) |
| 2148 | return; |
| 2149 | |
| 2150 | l = strlen (cp->c_name); |
| 2151 | namevar = xmalloc (l + 16); |
| 2152 | |
| 2153 | sprintf (namevar, "%s_PID", cp->c_name); |
| 2154 | unbind_variable (namevar); |
| 2155 | |
| 2156 | #if defined (ARRAY_VARS) |
| 2157 | unbind_variable (cp->c_name); |
| 2158 | #else |
| 2159 | sprintf (namevar, "%s_READ", cp->c_name); |
| 2160 | unbind_variable (namevar); |
| 2161 | sprintf (namevar, "%s_WRITE", cp->c_name); |
| 2162 | unbind_variable (namevar); |
| 2163 | #endif |
| 2164 | |
| 2165 | free (namevar); |
| 2166 | } |
| 2167 | |
| 2168 | static int |
| 2169 | execute_coproc (command, pipe_in, pipe_out, fds_to_close) |
| 2170 | COMMAND *command; |
| 2171 | int pipe_in, pipe_out; |
| 2172 | struct fd_bitmap *fds_to_close; |
| 2173 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2174 | int rpipe[2], wpipe[2], estat, invert; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2175 | pid_t coproc_pid; |
| 2176 | Coproc *cp; |
| 2177 | char *tcmd; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2178 | sigset_t set, oset; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2179 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2180 | /* XXX -- can be removed after changes to handle multiple coprocs */ |
| 2181 | #if !MULTIPLE_COPROCS |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2182 | if (sh_coproc.c_pid != NO_PID) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2183 | internal_warning ("execute_coproc: coproc [%d:%s] still exists", sh_coproc.c_pid, sh_coproc.c_name); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2184 | coproc_init (&sh_coproc); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2185 | #endif |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2186 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2187 | invert = (command->flags & CMD_INVERT_RETURN) != 0; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2188 | command_string_index = 0; |
| 2189 | tcmd = make_command_string (command); |
| 2190 | |
| 2191 | sh_openpipe ((int *)&rpipe); /* 0 = parent read, 1 = child write */ |
| 2192 | sh_openpipe ((int *)&wpipe); /* 0 = child read, 1 = parent write */ |
| 2193 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2194 | BLOCK_SIGNAL (SIGCHLD, set, oset); |
| 2195 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2196 | coproc_pid = make_child (savestring (tcmd), 1); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2197 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2198 | if (coproc_pid == 0) |
| 2199 | { |
| 2200 | close (rpipe[0]); |
| 2201 | close (wpipe[1]); |
| 2202 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2203 | UNBLOCK_SIGNAL (oset); |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 2204 | estat = execute_in_subshell (command, 1, wpipe[0], rpipe[1], fds_to_close); |
| 2205 | |
| 2206 | fflush (stdout); |
| 2207 | fflush (stderr); |
| 2208 | |
| 2209 | exit (estat); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2210 | } |
| 2211 | |
| 2212 | close (rpipe[1]); |
| 2213 | close (wpipe[0]); |
| 2214 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2215 | /* XXX - possibly run Coproc->name through word expansion? */ |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2216 | cp = coproc_alloc (command->value.Coproc->name, coproc_pid); |
| 2217 | cp->c_rfd = rpipe[0]; |
| 2218 | cp->c_wfd = wpipe[1]; |
| 2219 | |
| 2220 | SET_CLOSE_ON_EXEC (cp->c_rfd); |
| 2221 | SET_CLOSE_ON_EXEC (cp->c_wfd); |
| 2222 | |
| 2223 | coproc_setvars (cp); |
| 2224 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2225 | UNBLOCK_SIGNAL (oset); |
| 2226 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2227 | #if 0 |
| 2228 | itrace ("execute_coproc: [%d] %s", coproc_pid, the_printed_command); |
| 2229 | #endif |
| 2230 | |
| 2231 | close_pipes (pipe_in, pipe_out); |
| 2232 | #if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD) |
| 2233 | unlink_fifo_list (); |
| 2234 | #endif |
| 2235 | stop_pipeline (1, (COMMAND *)NULL); |
| 2236 | DESCRIBE_PID (coproc_pid); |
| 2237 | run_pending_traps (); |
| 2238 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2239 | return (invert ? EXECUTION_FAILURE : EXECUTION_SUCCESS); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2240 | } |
| 2241 | #endif |
| 2242 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2243 | static void |
| 2244 | restore_stdin (s) |
| 2245 | int s; |
| 2246 | { |
| 2247 | dup2 (s, 0); |
| 2248 | close (s); |
| 2249 | } |
| 2250 | |
| 2251 | /* Catch-all cleanup function for lastpipe code for unwind-protects */ |
| 2252 | static void |
| 2253 | lastpipe_cleanup (s) |
| 2254 | int s; |
| 2255 | { |
| 2256 | unfreeze_jobs_list (); |
| 2257 | } |
| 2258 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2259 | static int |
| 2260 | execute_pipeline (command, asynchronous, pipe_in, pipe_out, fds_to_close) |
| 2261 | COMMAND *command; |
| 2262 | int asynchronous, pipe_in, pipe_out; |
| 2263 | struct fd_bitmap *fds_to_close; |
| 2264 | { |
| 2265 | int prev, fildes[2], new_bitmap_size, dummyfd, ignore_return, exec_result; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2266 | int lstdin, lastpipe_flag, lastpipe_jid; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2267 | COMMAND *cmd; |
| 2268 | struct fd_bitmap *fd_bitmap; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2269 | pid_t lastpid; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2270 | |
| 2271 | #if defined (JOB_CONTROL) |
| 2272 | sigset_t set, oset; |
| 2273 | BLOCK_CHILD (set, oset); |
| 2274 | #endif /* JOB_CONTROL */ |
| 2275 | |
| 2276 | ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0; |
| 2277 | |
| 2278 | prev = pipe_in; |
| 2279 | cmd = command; |
| 2280 | |
| 2281 | while (cmd && cmd->type == cm_connection && |
| 2282 | cmd->value.Connection && cmd->value.Connection->connector == '|') |
| 2283 | { |
| 2284 | /* Make a pipeline between the two commands. */ |
| 2285 | if (pipe (fildes) < 0) |
| 2286 | { |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2287 | sys_error (_("pipe error")); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2288 | #if defined (JOB_CONTROL) |
| 2289 | terminate_current_pipeline (); |
| 2290 | kill_current_pipeline (); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 2291 | UNBLOCK_CHILD (oset); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2292 | #endif /* JOB_CONTROL */ |
| 2293 | last_command_exit_value = EXECUTION_FAILURE; |
| 2294 | /* The unwind-protects installed below will take care |
| 2295 | of closing all of the open file descriptors. */ |
| 2296 | throw_to_top_level (); |
| 2297 | return (EXECUTION_FAILURE); /* XXX */ |
| 2298 | } |
| 2299 | |
| 2300 | /* Here is a problem: with the new file close-on-exec |
| 2301 | code, the read end of the pipe (fildes[0]) stays open |
| 2302 | in the first process, so that process will never get a |
| 2303 | SIGPIPE. There is no way to signal the first process |
| 2304 | that it should close fildes[0] after forking, so it |
| 2305 | remains open. No SIGPIPE is ever sent because there |
| 2306 | is still a file descriptor open for reading connected |
| 2307 | to the pipe. We take care of that here. This passes |
| 2308 | around a bitmap of file descriptors that must be |
| 2309 | closed after making a child process in execute_simple_command. */ |
| 2310 | |
| 2311 | /* We need fd_bitmap to be at least as big as fildes[0]. |
| 2312 | If fildes[0] is less than fds_to_close->size, then |
| 2313 | use fds_to_close->size. */ |
| 2314 | new_bitmap_size = (fildes[0] < fds_to_close->size) |
| 2315 | ? fds_to_close->size |
| 2316 | : fildes[0] + 8; |
| 2317 | |
| 2318 | fd_bitmap = new_fd_bitmap (new_bitmap_size); |
| 2319 | |
| 2320 | /* Now copy the old information into the new bitmap. */ |
| 2321 | xbcopy ((char *)fds_to_close->bitmap, (char *)fd_bitmap->bitmap, fds_to_close->size); |
| 2322 | |
| 2323 | /* And mark the pipe file descriptors to be closed. */ |
| 2324 | fd_bitmap->bitmap[fildes[0]] = 1; |
| 2325 | |
| 2326 | /* In case there are pipe or out-of-processes errors, we |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 2327 | want all these file descriptors to be closed when |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2328 | unwind-protects are run, and the storage used for the |
| 2329 | bitmaps freed up. */ |
| 2330 | begin_unwind_frame ("pipe-file-descriptors"); |
| 2331 | add_unwind_protect (dispose_fd_bitmap, fd_bitmap); |
| 2332 | add_unwind_protect (close_fd_bitmap, fd_bitmap); |
| 2333 | if (prev >= 0) |
| 2334 | add_unwind_protect (close, prev); |
| 2335 | dummyfd = fildes[1]; |
| 2336 | add_unwind_protect (close, dummyfd); |
| 2337 | |
| 2338 | #if defined (JOB_CONTROL) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 2339 | add_unwind_protect (restore_signal_mask, &oset); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2340 | #endif /* JOB_CONTROL */ |
| 2341 | |
| 2342 | if (ignore_return && cmd->value.Connection->first) |
| 2343 | cmd->value.Connection->first->flags |= CMD_IGNORE_RETURN; |
| 2344 | execute_command_internal (cmd->value.Connection->first, asynchronous, |
| 2345 | prev, fildes[1], fd_bitmap); |
| 2346 | |
| 2347 | if (prev >= 0) |
| 2348 | close (prev); |
| 2349 | |
| 2350 | prev = fildes[0]; |
| 2351 | close (fildes[1]); |
| 2352 | |
| 2353 | dispose_fd_bitmap (fd_bitmap); |
| 2354 | discard_unwind_frame ("pipe-file-descriptors"); |
| 2355 | |
| 2356 | cmd = cmd->value.Connection->second; |
| 2357 | } |
| 2358 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2359 | lastpid = last_made_pid; |
| 2360 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2361 | /* Now execute the rightmost command in the pipeline. */ |
| 2362 | if (ignore_return && cmd) |
| 2363 | cmd->flags |= CMD_IGNORE_RETURN; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2364 | |
| 2365 | lastpipe_flag = 0; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2366 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2367 | begin_unwind_frame ("lastpipe-exec"); |
| 2368 | lstdin = -1; |
| 2369 | /* If the `lastpipe' option is set with shopt, and job control is not |
| 2370 | enabled, execute the last element of non-async pipelines in the |
| 2371 | current shell environment. */ |
| 2372 | if (lastpipe_opt && job_control == 0 && asynchronous == 0 && pipe_out == NO_PIPE && prev > 0) |
| 2373 | { |
Chet Ramey | 7234797 | 2012-05-07 16:23:06 -0400 | [diff] [blame] | 2374 | lstdin = move_to_high_fd (0, 1, -1); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2375 | if (lstdin > 0) |
| 2376 | { |
| 2377 | do_piping (prev, pipe_out); |
| 2378 | prev = NO_PIPE; |
| 2379 | add_unwind_protect (restore_stdin, lstdin); |
| 2380 | lastpipe_flag = 1; |
| 2381 | freeze_jobs_list (); |
| 2382 | lastpipe_jid = stop_pipeline (0, (COMMAND *)NULL); /* XXX */ |
| 2383 | add_unwind_protect (lastpipe_cleanup, lastpipe_jid); |
| 2384 | } |
Chet Ramey | 335de49 | 2011-11-22 20:03:16 -0500 | [diff] [blame] | 2385 | if (cmd) |
| 2386 | cmd->flags |= CMD_LASTPIPE; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2387 | } |
| 2388 | if (prev >= 0) |
| 2389 | add_unwind_protect (close, prev); |
| 2390 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2391 | exec_result = execute_command_internal (cmd, asynchronous, prev, pipe_out, fds_to_close); |
| 2392 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2393 | if (lstdin > 0) |
| 2394 | restore_stdin (lstdin); |
| 2395 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2396 | if (prev >= 0) |
| 2397 | close (prev); |
| 2398 | |
| 2399 | #if defined (JOB_CONTROL) |
| 2400 | UNBLOCK_CHILD (oset); |
| 2401 | #endif |
| 2402 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2403 | QUIT; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2404 | |
| 2405 | if (lastpipe_flag) |
| 2406 | { |
| 2407 | #if defined (JOB_CONTROL) |
| 2408 | append_process (savestring (the_printed_command), dollar_dollar_pid, exec_result, lastpipe_jid); |
| 2409 | #endif |
| 2410 | lstdin = wait_for (lastpid); |
| 2411 | #if defined (JOB_CONTROL) |
Chet Ramey | df2c55d | 2014-08-01 15:31:14 -0400 | [diff] [blame^] | 2412 | /* If wait_for removes the job from the jobs table, use result of last |
| 2413 | command as pipeline's exit status as usual. The jobs list can get |
| 2414 | frozen and unfrozen at inconvenient times if there are multiple pipelines |
| 2415 | running simultaneously. */ |
| 2416 | if (INVALID_JOB (lastpipe_jid) == 0) |
| 2417 | exec_result = job_exit_status (lastpipe_jid); |
| 2418 | else if (pipefail_opt) |
| 2419 | exec_result = exec_result | lstdin; /* XXX */ |
| 2420 | /* otherwise we use exec_result */ |
| 2421 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2422 | #endif |
| 2423 | unfreeze_jobs_list (); |
| 2424 | } |
| 2425 | |
| 2426 | discard_unwind_frame ("lastpipe-exec"); |
| 2427 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2428 | return (exec_result); |
| 2429 | } |
| 2430 | |
| 2431 | static int |
| 2432 | execute_connection (command, asynchronous, pipe_in, pipe_out, fds_to_close) |
| 2433 | COMMAND *command; |
| 2434 | int asynchronous, pipe_in, pipe_out; |
| 2435 | struct fd_bitmap *fds_to_close; |
| 2436 | { |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2437 | COMMAND *tc, *second; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 2438 | int ignore_return, exec_result, was_error_trap, invert; |
Chet Ramey | 89a9286 | 2011-11-21 20:49:12 -0500 | [diff] [blame] | 2439 | volatile int save_line_number; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2440 | |
| 2441 | ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0; |
| 2442 | |
| 2443 | switch (command->value.Connection->connector) |
| 2444 | { |
| 2445 | /* Do the first command asynchronously. */ |
| 2446 | case '&': |
| 2447 | tc = command->value.Connection->first; |
| 2448 | if (tc == 0) |
| 2449 | return (EXECUTION_SUCCESS); |
| 2450 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 2451 | if (ignore_return) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2452 | tc->flags |= CMD_IGNORE_RETURN; |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 2453 | tc->flags |= CMD_AMPERSAND; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2454 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 2455 | /* If this shell was compiled without job control support, |
| 2456 | if we are currently in a subshell via `( xxx )', or if job |
| 2457 | control is not active then the standard input for an |
| 2458 | asynchronous command is forced to /dev/null. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2459 | #if defined (JOB_CONTROL) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 2460 | if ((subshell_environment || !job_control) && !stdin_redir) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2461 | #else |
| 2462 | if (!stdin_redir) |
| 2463 | #endif /* JOB_CONTROL */ |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2464 | tc->flags |= CMD_STDIN_REDIR; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2465 | |
| 2466 | exec_result = execute_command_internal (tc, 1, pipe_in, pipe_out, fds_to_close); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2467 | QUIT; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2468 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 2469 | if (tc->flags & CMD_STDIN_REDIR) |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2470 | tc->flags &= ~CMD_STDIN_REDIR; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2471 | |
| 2472 | second = command->value.Connection->second; |
| 2473 | if (second) |
| 2474 | { |
| 2475 | if (ignore_return) |
| 2476 | second->flags |= CMD_IGNORE_RETURN; |
| 2477 | |
| 2478 | exec_result = execute_command_internal (second, asynchronous, pipe_in, pipe_out, fds_to_close); |
| 2479 | } |
| 2480 | |
| 2481 | break; |
| 2482 | |
| 2483 | /* Just call execute command on both sides. */ |
| 2484 | case ';': |
| 2485 | if (ignore_return) |
| 2486 | { |
| 2487 | if (command->value.Connection->first) |
| 2488 | command->value.Connection->first->flags |= CMD_IGNORE_RETURN; |
| 2489 | if (command->value.Connection->second) |
| 2490 | command->value.Connection->second->flags |= CMD_IGNORE_RETURN; |
| 2491 | } |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2492 | executing_list++; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2493 | QUIT; |
| 2494 | execute_command (command->value.Connection->first); |
| 2495 | QUIT; |
| 2496 | exec_result = execute_command_internal (command->value.Connection->second, |
| 2497 | asynchronous, pipe_in, pipe_out, |
| 2498 | fds_to_close); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2499 | executing_list--; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2500 | break; |
| 2501 | |
| 2502 | case '|': |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 2503 | was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0; |
| 2504 | invert = (command->flags & CMD_INVERT_RETURN) != 0; |
| 2505 | ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0; |
| 2506 | |
Chet Ramey | 89a9286 | 2011-11-21 20:49:12 -0500 | [diff] [blame] | 2507 | line_number_for_err_trap = line_number; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2508 | exec_result = execute_pipeline (command, asynchronous, pipe_in, pipe_out, fds_to_close); |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 2509 | |
| 2510 | if (was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS) |
| 2511 | { |
| 2512 | last_command_exit_value = exec_result; |
Chet Ramey | 89a9286 | 2011-11-21 20:49:12 -0500 | [diff] [blame] | 2513 | save_line_number = line_number; |
| 2514 | line_number = line_number_for_err_trap; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 2515 | run_error_trap (); |
Chet Ramey | 89a9286 | 2011-11-21 20:49:12 -0500 | [diff] [blame] | 2516 | line_number = save_line_number; |
Jari Aalto | 17345e5 | 2009-02-19 22:21:29 +0000 | [diff] [blame] | 2517 | } |
| 2518 | |
| 2519 | if (ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS) |
| 2520 | { |
| 2521 | last_command_exit_value = exec_result; |
| 2522 | run_pending_traps (); |
| 2523 | jump_to_top_level (ERREXIT); |
| 2524 | } |
| 2525 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2526 | break; |
| 2527 | |
| 2528 | case AND_AND: |
| 2529 | case OR_OR: |
| 2530 | if (asynchronous) |
| 2531 | { |
| 2532 | /* If we have something like `a && b &' or `a || b &', run the |
| 2533 | && or || stuff in a subshell. Force a subshell and just call |
| 2534 | execute_command_internal again. Leave asynchronous on |
| 2535 | so that we get a report from the parent shell about the |
| 2536 | background job. */ |
| 2537 | command->flags |= CMD_FORCE_SUBSHELL; |
| 2538 | exec_result = execute_command_internal (command, 1, pipe_in, pipe_out, fds_to_close); |
| 2539 | break; |
| 2540 | } |
| 2541 | |
| 2542 | /* Execute the first command. If the result of that is successful |
| 2543 | and the connector is AND_AND, or the result is not successful |
| 2544 | and the connector is OR_OR, then execute the second command, |
| 2545 | otherwise return. */ |
| 2546 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2547 | executing_list++; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2548 | if (command->value.Connection->first) |
| 2549 | command->value.Connection->first->flags |= CMD_IGNORE_RETURN; |
| 2550 | |
| 2551 | exec_result = execute_command (command->value.Connection->first); |
| 2552 | QUIT; |
| 2553 | if (((command->value.Connection->connector == AND_AND) && |
| 2554 | (exec_result == EXECUTION_SUCCESS)) || |
| 2555 | ((command->value.Connection->connector == OR_OR) && |
| 2556 | (exec_result != EXECUTION_SUCCESS))) |
| 2557 | { |
| 2558 | if (ignore_return && command->value.Connection->second) |
| 2559 | command->value.Connection->second->flags |= CMD_IGNORE_RETURN; |
| 2560 | |
| 2561 | exec_result = execute_command (command->value.Connection->second); |
| 2562 | } |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2563 | executing_list--; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2564 | break; |
| 2565 | |
| 2566 | default: |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 2567 | command_error ("execute_connection", CMDERR_BADCONN, command->value.Connection->connector, 0); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2568 | jump_to_top_level (DISCARD); |
| 2569 | exec_result = EXECUTION_FAILURE; |
| 2570 | } |
| 2571 | |
| 2572 | return exec_result; |
| 2573 | } |
| 2574 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2575 | #define REAP() \ |
| 2576 | do \ |
| 2577 | { \ |
| 2578 | if (!interactive_shell) \ |
| 2579 | reap_dead_jobs (); \ |
| 2580 | } \ |
| 2581 | while (0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2582 | |
| 2583 | /* Execute a FOR command. The syntax is: FOR word_desc IN word_list; |
| 2584 | DO command; DONE */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2585 | static int |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2586 | execute_for_command (for_command) |
| 2587 | FOR_COM *for_command; |
| 2588 | { |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2589 | register WORD_LIST *releaser, *list; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2590 | SHELL_VAR *v; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2591 | char *identifier; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2592 | int retval, save_line_number; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2593 | #if 0 |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2594 | SHELL_VAR *old_value = (SHELL_VAR *)NULL; /* Remember the old value of x. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2595 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2596 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2597 | save_line_number = line_number; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2598 | if (check_identifier (for_command->name, 1) == 0) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2599 | { |
| 2600 | if (posixly_correct && interactive_shell == 0) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 2601 | { |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 2602 | last_command_exit_value = EX_BADUSAGE; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2603 | jump_to_top_level (ERREXIT); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 2604 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2605 | return (EXECUTION_FAILURE); |
| 2606 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2607 | |
| 2608 | loop_level++; |
| 2609 | identifier = for_command->name->word; |
| 2610 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2611 | line_number = for_command->line; /* for expansion error messages */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2612 | list = releaser = expand_words_no_vars (for_command->map_list); |
| 2613 | |
| 2614 | begin_unwind_frame ("for"); |
| 2615 | add_unwind_protect (dispose_words, releaser); |
| 2616 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2617 | #if 0 |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2618 | if (lexical_scoping) |
| 2619 | { |
| 2620 | old_value = copy_variable (find_variable (identifier)); |
| 2621 | if (old_value) |
| 2622 | add_unwind_protect (dispose_variable, old_value); |
| 2623 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2624 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2625 | |
| 2626 | if (for_command->flags & CMD_IGNORE_RETURN) |
| 2627 | for_command->action->flags |= CMD_IGNORE_RETURN; |
| 2628 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2629 | for (retval = EXECUTION_SUCCESS; list; list = list->next) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2630 | { |
| 2631 | QUIT; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2632 | |
| 2633 | line_number = for_command->line; |
| 2634 | |
| 2635 | /* Remember what this command looks like, for debugger. */ |
| 2636 | command_string_index = 0; |
| 2637 | print_for_command_head (for_command); |
| 2638 | |
| 2639 | if (echo_command_at_execute) |
| 2640 | xtrace_print_for_command_head (for_command); |
| 2641 | |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 2642 | /* Save this command unless it's a trap command and we're not running |
| 2643 | a debug trap. */ |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 2644 | if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2645 | { |
| 2646 | FREE (the_printed_command_except_trap); |
| 2647 | the_printed_command_except_trap = savestring (the_printed_command); |
| 2648 | } |
| 2649 | |
| 2650 | retval = run_debug_trap (); |
| 2651 | #if defined (DEBUGGER) |
| 2652 | /* In debugging mode, if the DEBUG trap returns a non-zero status, we |
| 2653 | skip the command. */ |
| 2654 | if (debugging_mode && retval != EXECUTION_SUCCESS) |
| 2655 | continue; |
| 2656 | #endif |
| 2657 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2658 | this_command_name = (char *)NULL; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2659 | /* XXX - special ksh93 for command index variable handling */ |
| 2660 | v = find_variable_last_nameref (identifier); |
| 2661 | if (v && nameref_p (v)) |
| 2662 | { |
| 2663 | v = bind_variable_value (v, list->word->word, 0); |
| 2664 | } |
| 2665 | else |
| 2666 | v = bind_variable (identifier, list->word->word, 0); |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 2667 | if (readonly_p (v) || noassign_p (v)) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2668 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2669 | line_number = save_line_number; |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 2670 | if (readonly_p (v) && interactive_shell == 0 && posixly_correct) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2671 | { |
| 2672 | last_command_exit_value = EXECUTION_FAILURE; |
| 2673 | jump_to_top_level (FORCE_EOF); |
| 2674 | } |
| 2675 | else |
| 2676 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2677 | dispose_words (releaser); |
| 2678 | discard_unwind_frame ("for"); |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 2679 | loop_level--; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2680 | return (EXECUTION_FAILURE); |
| 2681 | } |
| 2682 | } |
| 2683 | retval = execute_command (for_command->action); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2684 | REAP (); |
| 2685 | QUIT; |
| 2686 | |
| 2687 | if (breaking) |
| 2688 | { |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2689 | breaking--; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2690 | break; |
| 2691 | } |
| 2692 | |
| 2693 | if (continuing) |
| 2694 | { |
| 2695 | continuing--; |
| 2696 | if (continuing) |
| 2697 | break; |
| 2698 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2699 | } |
| 2700 | |
| 2701 | loop_level--; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2702 | line_number = save_line_number; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2703 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2704 | #if 0 |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2705 | if (lexical_scoping) |
| 2706 | { |
| 2707 | if (!old_value) |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2708 | unbind_variable (identifier); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2709 | else |
| 2710 | { |
| 2711 | SHELL_VAR *new_value; |
| 2712 | |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 2713 | new_value = bind_variable (identifier, value_cell(old_value), 0); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2714 | new_value->attributes = old_value->attributes; |
| 2715 | dispose_variable (old_value); |
| 2716 | } |
| 2717 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2718 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2719 | |
| 2720 | dispose_words (releaser); |
| 2721 | discard_unwind_frame ("for"); |
| 2722 | return (retval); |
| 2723 | } |
| 2724 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2725 | #if defined (ARITH_FOR_COMMAND) |
| 2726 | /* Execute an arithmetic for command. The syntax is |
| 2727 | |
| 2728 | for (( init ; step ; test )) |
| 2729 | do |
| 2730 | body |
| 2731 | done |
| 2732 | |
| 2733 | The execution should be exactly equivalent to |
| 2734 | |
| 2735 | eval \(\( init \)\) |
| 2736 | while eval \(\( test \)\) ; do |
| 2737 | body; |
| 2738 | eval \(\( step \)\) |
| 2739 | done |
| 2740 | */ |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2741 | static intmax_t |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2742 | eval_arith_for_expr (l, okp) |
| 2743 | WORD_LIST *l; |
| 2744 | int *okp; |
| 2745 | { |
| 2746 | WORD_LIST *new; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2747 | intmax_t expresult; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2748 | int r; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2749 | |
| 2750 | new = expand_words_no_vars (l); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 2751 | if (new) |
| 2752 | { |
| 2753 | if (echo_command_at_execute) |
| 2754 | xtrace_print_arith_cmd (new); |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2755 | this_command_name = "(("; /* )) for expression error messages */ |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2756 | |
| 2757 | command_string_index = 0; |
| 2758 | print_arith_command (new); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 2759 | if (signal_in_progress (DEBUG_TRAP) == 0) |
| 2760 | { |
| 2761 | FREE (the_printed_command_except_trap); |
| 2762 | the_printed_command_except_trap = savestring (the_printed_command); |
| 2763 | } |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2764 | |
| 2765 | r = run_debug_trap (); |
| 2766 | /* In debugging mode, if the DEBUG trap returns a non-zero status, we |
| 2767 | skip the command. */ |
| 2768 | #if defined (DEBUGGER) |
| 2769 | if (debugging_mode == 0 || r == EXECUTION_SUCCESS) |
| 2770 | expresult = evalexp (new->word->word, okp); |
| 2771 | else |
| 2772 | { |
| 2773 | expresult = 0; |
| 2774 | if (okp) |
| 2775 | *okp = 1; |
| 2776 | } |
| 2777 | #else |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 2778 | expresult = evalexp (new->word->word, okp); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2779 | #endif |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 2780 | dispose_words (new); |
| 2781 | } |
| 2782 | else |
| 2783 | { |
| 2784 | expresult = 0; |
| 2785 | if (okp) |
| 2786 | *okp = 1; |
| 2787 | } |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2788 | return (expresult); |
| 2789 | } |
| 2790 | |
| 2791 | static int |
| 2792 | execute_arith_for_command (arith_for_command) |
| 2793 | ARITH_FOR_COM *arith_for_command; |
| 2794 | { |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2795 | intmax_t expresult; |
| 2796 | int expok, body_status, arith_lineno, save_lineno; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2797 | |
| 2798 | body_status = EXECUTION_SUCCESS; |
| 2799 | loop_level++; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2800 | save_lineno = line_number; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2801 | |
| 2802 | if (arith_for_command->flags & CMD_IGNORE_RETURN) |
| 2803 | arith_for_command->action->flags |= CMD_IGNORE_RETURN; |
| 2804 | |
| 2805 | this_command_name = "(("; /* )) for expression error messages */ |
| 2806 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2807 | /* save the starting line number of the command so we can reset |
| 2808 | line_number before executing each expression -- for $LINENO |
| 2809 | and the DEBUG trap. */ |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2810 | line_number = arith_lineno = arith_for_command->line; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2811 | if (variable_context && interactive_shell) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2812 | line_number -= function_line_number; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2813 | |
| 2814 | /* Evaluate the initialization expression. */ |
| 2815 | expresult = eval_arith_for_expr (arith_for_command->init, &expok); |
| 2816 | if (expok == 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2817 | { |
| 2818 | line_number = save_lineno; |
| 2819 | return (EXECUTION_FAILURE); |
| 2820 | } |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2821 | |
| 2822 | while (1) |
| 2823 | { |
| 2824 | /* Evaluate the test expression. */ |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2825 | line_number = arith_lineno; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2826 | expresult = eval_arith_for_expr (arith_for_command->test, &expok); |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2827 | line_number = save_lineno; |
| 2828 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2829 | if (expok == 0) |
| 2830 | { |
| 2831 | body_status = EXECUTION_FAILURE; |
| 2832 | break; |
| 2833 | } |
| 2834 | REAP (); |
| 2835 | if (expresult == 0) |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 2836 | break; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2837 | |
| 2838 | /* Execute the body of the arithmetic for command. */ |
| 2839 | QUIT; |
| 2840 | body_status = execute_command (arith_for_command->action); |
| 2841 | QUIT; |
| 2842 | |
| 2843 | /* Handle any `break' or `continue' commands executed by the body. */ |
| 2844 | if (breaking) |
| 2845 | { |
| 2846 | breaking--; |
| 2847 | break; |
| 2848 | } |
| 2849 | |
| 2850 | if (continuing) |
| 2851 | { |
| 2852 | continuing--; |
| 2853 | if (continuing) |
| 2854 | break; |
| 2855 | } |
| 2856 | |
| 2857 | /* Evaluate the step expression. */ |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2858 | line_number = arith_lineno; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2859 | expresult = eval_arith_for_expr (arith_for_command->step, &expok); |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 2860 | line_number = save_lineno; |
| 2861 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2862 | if (expok == 0) |
| 2863 | { |
| 2864 | body_status = EXECUTION_FAILURE; |
| 2865 | break; |
| 2866 | } |
| 2867 | } |
| 2868 | |
| 2869 | loop_level--; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 2870 | line_number = save_lineno; |
| 2871 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 2872 | return (body_status); |
| 2873 | } |
| 2874 | #endif |
| 2875 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2876 | #if defined (SELECT_COMMAND) |
| 2877 | static int LINES, COLS, tabsize; |
| 2878 | |
| 2879 | #define RP_SPACE ") " |
| 2880 | #define RP_SPACE_LEN 2 |
| 2881 | |
| 2882 | /* XXX - does not handle numbers > 1000000 at all. */ |
| 2883 | #define NUMBER_LEN(s) \ |
| 2884 | ((s < 10) ? 1 \ |
| 2885 | : ((s < 100) ? 2 \ |
| 2886 | : ((s < 1000) ? 3 \ |
| 2887 | : ((s < 10000) ? 4 \ |
| 2888 | : ((s < 100000) ? 5 \ |
| 2889 | : 6))))) |
| 2890 | |
| 2891 | static int |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2892 | displen (s) |
| 2893 | const char *s; |
| 2894 | { |
| 2895 | #if defined (HANDLE_MULTIBYTE) |
| 2896 | wchar_t *wcstr; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2897 | size_t slen; |
| 2898 | int wclen; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2899 | |
| 2900 | wcstr = 0; |
| 2901 | slen = mbstowcs (wcstr, s, 0); |
| 2902 | if (slen == -1) |
| 2903 | slen = 0; |
| 2904 | wcstr = (wchar_t *)xmalloc (sizeof (wchar_t) * (slen + 1)); |
| 2905 | mbstowcs (wcstr, s, slen + 1); |
| 2906 | wclen = wcswidth (wcstr, slen); |
| 2907 | free (wcstr); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2908 | return (wclen < 0 ? STRLEN(s) : wclen); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2909 | #else |
| 2910 | return (STRLEN (s)); |
| 2911 | #endif |
| 2912 | } |
| 2913 | |
| 2914 | static int |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2915 | print_index_and_element (len, ind, list) |
| 2916 | int len, ind; |
| 2917 | WORD_LIST *list; |
| 2918 | { |
| 2919 | register WORD_LIST *l; |
| 2920 | register int i; |
| 2921 | |
| 2922 | if (list == 0) |
| 2923 | return (0); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2924 | for (i = ind, l = list; l && --i; l = l->next) |
| 2925 | ; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 2926 | if (l == 0) /* don't think this can happen */ |
| 2927 | return (0); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2928 | fprintf (stderr, "%*d%s%s", len, ind, RP_SPACE, l->word->word); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 2929 | return (displen (l->word->word)); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2930 | } |
| 2931 | |
| 2932 | static void |
| 2933 | indent (from, to) |
| 2934 | int from, to; |
| 2935 | { |
| 2936 | while (from < to) |
| 2937 | { |
| 2938 | if ((to / tabsize) > (from / tabsize)) |
| 2939 | { |
| 2940 | putc ('\t', stderr); |
| 2941 | from += tabsize - from % tabsize; |
| 2942 | } |
| 2943 | else |
| 2944 | { |
| 2945 | putc (' ', stderr); |
| 2946 | from++; |
| 2947 | } |
| 2948 | } |
| 2949 | } |
| 2950 | |
| 2951 | static void |
| 2952 | print_select_list (list, list_len, max_elem_len, indices_len) |
| 2953 | WORD_LIST *list; |
| 2954 | int list_len, max_elem_len, indices_len; |
| 2955 | { |
| 2956 | int ind, row, elem_len, pos, cols, rows; |
| 2957 | int first_column_indices_len, other_indices_len; |
| 2958 | |
| 2959 | if (list == 0) |
| 2960 | { |
| 2961 | putc ('\n', stderr); |
| 2962 | return; |
| 2963 | } |
| 2964 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 2965 | cols = max_elem_len ? COLS / max_elem_len : 1; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 2966 | if (cols == 0) |
| 2967 | cols = 1; |
| 2968 | rows = list_len ? list_len / cols + (list_len % cols != 0) : 1; |
| 2969 | cols = list_len ? list_len / rows + (list_len % rows != 0) : 1; |
| 2970 | |
| 2971 | if (rows == 1) |
| 2972 | { |
| 2973 | rows = cols; |
| 2974 | cols = 1; |
| 2975 | } |
| 2976 | |
| 2977 | first_column_indices_len = NUMBER_LEN (rows); |
| 2978 | other_indices_len = indices_len; |
| 2979 | |
| 2980 | for (row = 0; row < rows; row++) |
| 2981 | { |
| 2982 | ind = row; |
| 2983 | pos = 0; |
| 2984 | while (1) |
| 2985 | { |
| 2986 | indices_len = (pos == 0) ? first_column_indices_len : other_indices_len; |
| 2987 | elem_len = print_index_and_element (indices_len, ind + 1, list); |
| 2988 | elem_len += indices_len + RP_SPACE_LEN; |
| 2989 | ind += rows; |
| 2990 | if (ind >= list_len) |
| 2991 | break; |
| 2992 | indent (pos + elem_len, pos + max_elem_len); |
| 2993 | pos += max_elem_len; |
| 2994 | } |
| 2995 | putc ('\n', stderr); |
| 2996 | } |
| 2997 | } |
| 2998 | |
| 2999 | /* Print the elements of LIST, one per line, preceded by an index from 1 to |
| 3000 | LIST_LEN. Then display PROMPT and wait for the user to enter a number. |
| 3001 | If the number is between 1 and LIST_LEN, return that selection. If EOF |
Jari Aalto | e8ce775 | 1997-09-22 20:22:27 +0000 | [diff] [blame] | 3002 | is read, return a null string. If a blank line is entered, or an invalid |
| 3003 | number is entered, the loop is executed again. */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3004 | static char * |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3005 | select_query (list, list_len, prompt, print_menu) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3006 | WORD_LIST *list; |
| 3007 | int list_len; |
| 3008 | char *prompt; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3009 | int print_menu; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3010 | { |
Jari Aalto | e8ce775 | 1997-09-22 20:22:27 +0000 | [diff] [blame] | 3011 | int max_elem_len, indices_len, len; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3012 | intmax_t reply; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3013 | WORD_LIST *l; |
| 3014 | char *repl_string, *t; |
| 3015 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 3016 | #if 0 |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3017 | t = get_string_value ("LINES"); |
| 3018 | LINES = (t && *t) ? atoi (t) : 24; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 3019 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3020 | t = get_string_value ("COLUMNS"); |
| 3021 | COLS = (t && *t) ? atoi (t) : 80; |
| 3022 | |
| 3023 | #if 0 |
| 3024 | t = get_string_value ("TABSIZE"); |
| 3025 | tabsize = (t && *t) ? atoi (t) : 8; |
| 3026 | if (tabsize <= 0) |
| 3027 | tabsize = 8; |
| 3028 | #else |
| 3029 | tabsize = 8; |
| 3030 | #endif |
| 3031 | |
| 3032 | max_elem_len = 0; |
| 3033 | for (l = list; l; l = l->next) |
| 3034 | { |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 3035 | len = displen (l->word->word); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3036 | if (len > max_elem_len) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3037 | max_elem_len = len; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3038 | } |
| 3039 | indices_len = NUMBER_LEN (list_len); |
| 3040 | max_elem_len += indices_len + RP_SPACE_LEN + 2; |
| 3041 | |
| 3042 | while (1) |
| 3043 | { |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3044 | if (print_menu) |
| 3045 | print_select_list (list, list_len, max_elem_len, indices_len); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3046 | fprintf (stderr, "%s", prompt); |
| 3047 | fflush (stderr); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3048 | QUIT; |
| 3049 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 3050 | if (read_builtin ((WORD_LIST *)NULL) != EXECUTION_SUCCESS) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3051 | { |
| 3052 | putchar ('\n'); |
| 3053 | return ((char *)NULL); |
| 3054 | } |
| 3055 | repl_string = get_string_value ("REPLY"); |
| 3056 | if (*repl_string == 0) |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3057 | { |
| 3058 | print_menu = 1; |
| 3059 | continue; |
| 3060 | } |
Jari Aalto | e8ce775 | 1997-09-22 20:22:27 +0000 | [diff] [blame] | 3061 | if (legal_number (repl_string, &reply) == 0) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3062 | return ""; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3063 | if (reply < 1 || reply > list_len) |
| 3064 | return ""; |
| 3065 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3066 | for (l = list; l && --reply; l = l->next) |
| 3067 | ; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3068 | return (l->word->word); /* XXX - can't be null? */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3069 | } |
| 3070 | } |
| 3071 | |
| 3072 | /* Execute a SELECT command. The syntax is: |
| 3073 | SELECT word IN list DO command_list DONE |
| 3074 | Only `break' or `return' in command_list will terminate |
| 3075 | the command. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3076 | static int |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3077 | execute_select_command (select_command) |
| 3078 | SELECT_COM *select_command; |
| 3079 | { |
| 3080 | WORD_LIST *releaser, *list; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3081 | SHELL_VAR *v; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3082 | char *identifier, *ps3_prompt, *selection; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3083 | int retval, list_len, show_menu, save_line_number; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3084 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3085 | if (check_identifier (select_command->name, 1) == 0) |
| 3086 | return (EXECUTION_FAILURE); |
| 3087 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3088 | save_line_number = line_number; |
| 3089 | line_number = select_command->line; |
| 3090 | |
| 3091 | command_string_index = 0; |
| 3092 | print_select_command_head (select_command); |
| 3093 | |
| 3094 | if (echo_command_at_execute) |
| 3095 | xtrace_print_select_command_head (select_command); |
| 3096 | |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 3097 | #if 0 |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3098 | if (signal_in_progress (DEBUG_TRAP) == 0 && (this_command_name == 0 || (STREQ (this_command_name, "trap") == 0))) |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 3099 | #else |
| 3100 | if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0) |
| 3101 | #endif |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3102 | { |
| 3103 | FREE (the_printed_command_except_trap); |
| 3104 | the_printed_command_except_trap = savestring (the_printed_command); |
| 3105 | } |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3106 | |
| 3107 | retval = run_debug_trap (); |
| 3108 | #if defined (DEBUGGER) |
| 3109 | /* In debugging mode, if the DEBUG trap returns a non-zero status, we |
| 3110 | skip the command. */ |
| 3111 | if (debugging_mode && retval != EXECUTION_SUCCESS) |
| 3112 | return (EXECUTION_SUCCESS); |
| 3113 | #endif |
| 3114 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3115 | loop_level++; |
| 3116 | identifier = select_command->name->word; |
| 3117 | |
| 3118 | /* command and arithmetic substitution, parameter and variable expansion, |
| 3119 | word splitting, pathname expansion, and quote removal. */ |
| 3120 | list = releaser = expand_words_no_vars (select_command->map_list); |
| 3121 | list_len = list_length (list); |
| 3122 | if (list == 0 || list_len == 0) |
| 3123 | { |
| 3124 | if (list) |
| 3125 | dispose_words (list); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3126 | line_number = save_line_number; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3127 | return (EXECUTION_SUCCESS); |
| 3128 | } |
| 3129 | |
| 3130 | begin_unwind_frame ("select"); |
| 3131 | add_unwind_protect (dispose_words, releaser); |
| 3132 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3133 | if (select_command->flags & CMD_IGNORE_RETURN) |
| 3134 | select_command->action->flags |= CMD_IGNORE_RETURN; |
| 3135 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3136 | retval = EXECUTION_SUCCESS; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3137 | show_menu = 1; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3138 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3139 | while (1) |
| 3140 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3141 | line_number = select_command->line; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3142 | ps3_prompt = get_string_value ("PS3"); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3143 | if (ps3_prompt == 0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3144 | ps3_prompt = "#? "; |
| 3145 | |
| 3146 | QUIT; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3147 | selection = select_query (list, list_len, ps3_prompt, show_menu); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3148 | QUIT; |
| 3149 | if (selection == 0) |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3150 | { |
| 3151 | /* select_query returns EXECUTION_FAILURE if the read builtin |
| 3152 | fails, so we want to return failure in this case. */ |
| 3153 | retval = EXECUTION_FAILURE; |
| 3154 | break; |
| 3155 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3156 | |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3157 | v = bind_variable (identifier, selection, 0); |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 3158 | if (readonly_p (v) || noassign_p (v)) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3159 | { |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 3160 | if (readonly_p (v) && interactive_shell == 0 && posixly_correct) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3161 | { |
| 3162 | last_command_exit_value = EXECUTION_FAILURE; |
| 3163 | jump_to_top_level (FORCE_EOF); |
| 3164 | } |
| 3165 | else |
| 3166 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3167 | dispose_words (releaser); |
| 3168 | discard_unwind_frame ("select"); |
| 3169 | loop_level--; |
| 3170 | line_number = save_line_number; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3171 | return (EXECUTION_FAILURE); |
| 3172 | } |
| 3173 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3174 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3175 | retval = execute_command (select_command->action); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3176 | |
| 3177 | REAP (); |
| 3178 | QUIT; |
| 3179 | |
| 3180 | if (breaking) |
| 3181 | { |
| 3182 | breaking--; |
| 3183 | break; |
| 3184 | } |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 3185 | |
| 3186 | if (continuing) |
| 3187 | { |
| 3188 | continuing--; |
| 3189 | if (continuing) |
| 3190 | break; |
| 3191 | } |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3192 | |
| 3193 | #if defined (KSH_COMPATIBLE_SELECT) |
| 3194 | show_menu = 0; |
| 3195 | selection = get_string_value ("REPLY"); |
| 3196 | if (selection && *selection == '\0') |
| 3197 | show_menu = 1; |
| 3198 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3199 | } |
| 3200 | |
| 3201 | loop_level--; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3202 | line_number = save_line_number; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3203 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3204 | dispose_words (releaser); |
| 3205 | discard_unwind_frame ("select"); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3206 | return (retval); |
| 3207 | } |
| 3208 | #endif /* SELECT_COMMAND */ |
| 3209 | |
| 3210 | /* Execute a CASE command. The syntax is: CASE word_desc IN pattern_list ESAC. |
| 3211 | The pattern_list is a linked list of pattern clauses; each clause contains |
| 3212 | some patterns to compare word_desc against, and an associated command to |
| 3213 | execute. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3214 | static int |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3215 | execute_case_command (case_command) |
| 3216 | CASE_COM *case_command; |
| 3217 | { |
| 3218 | register WORD_LIST *list; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3219 | WORD_LIST *wlist, *es; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3220 | PATTERN_LIST *clauses; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3221 | char *word, *pattern; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3222 | int retval, match, ignore_return, save_line_number; |
| 3223 | |
| 3224 | save_line_number = line_number; |
| 3225 | line_number = case_command->line; |
| 3226 | |
| 3227 | command_string_index = 0; |
| 3228 | print_case_command_head (case_command); |
| 3229 | |
| 3230 | if (echo_command_at_execute) |
| 3231 | xtrace_print_case_command_head (case_command); |
| 3232 | |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 3233 | #if 0 |
| 3234 | if (signal_in_progress (DEBUG_TRAP) == 0 && (this_command_name == 0 || (STREQ (this_command_name, "trap") == 0))) |
| 3235 | #else |
| 3236 | if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0) |
| 3237 | #endif |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3238 | { |
| 3239 | FREE (the_printed_command_except_trap); |
| 3240 | the_printed_command_except_trap = savestring (the_printed_command); |
| 3241 | } |
| 3242 | |
| 3243 | retval = run_debug_trap(); |
| 3244 | #if defined (DEBUGGER) |
| 3245 | /* In debugging mode, if the DEBUG trap returns a non-zero status, we |
| 3246 | skip the command. */ |
| 3247 | if (debugging_mode && retval != EXECUTION_SUCCESS) |
| 3248 | { |
| 3249 | line_number = save_line_number; |
| 3250 | return (EXECUTION_SUCCESS); |
| 3251 | } |
| 3252 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3253 | |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 3254 | wlist = expand_word_unsplit (case_command->word, 0); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3255 | word = wlist ? string_list (wlist) : savestring (""); |
| 3256 | dispose_words (wlist); |
| 3257 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3258 | retval = EXECUTION_SUCCESS; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3259 | ignore_return = case_command->flags & CMD_IGNORE_RETURN; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3260 | |
| 3261 | begin_unwind_frame ("case"); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3262 | add_unwind_protect ((Function *)xfree, word); |
| 3263 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3264 | #define EXIT_CASE() goto exit_case_command |
| 3265 | |
| 3266 | for (clauses = case_command->clauses; clauses; clauses = clauses->next) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3267 | { |
| 3268 | QUIT; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3269 | for (list = clauses->patterns; list; list = list->next) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3270 | { |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3271 | es = expand_word_leave_quoted (list->word, 0); |
| 3272 | |
| 3273 | if (es && es->word && es->word->word && *(es->word->word)) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3274 | pattern = quote_string_for_globbing (es->word->word, QGLOB_CVTNULL); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3275 | else |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3276 | { |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3277 | pattern = (char *)xmalloc (1); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3278 | pattern[0] = '\0'; |
| 3279 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3280 | |
| 3281 | /* Since the pattern does not undergo quote removal (as per |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3282 | Posix.2, section 3.9.4.3), the strmatch () call must be able |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3283 | to recognize backslashes as escape characters. */ |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3284 | match = strmatch (pattern, word, FNMATCH_EXTFLAG|FNMATCH_IGNCASE) != FNM_NOMATCH; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3285 | free (pattern); |
| 3286 | |
| 3287 | dispose_words (es); |
| 3288 | |
| 3289 | if (match) |
| 3290 | { |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3291 | do |
| 3292 | { |
| 3293 | if (clauses->action && ignore_return) |
| 3294 | clauses->action->flags |= CMD_IGNORE_RETURN; |
| 3295 | retval = execute_command (clauses->action); |
| 3296 | } |
| 3297 | while ((clauses->flags & CASEPAT_FALLTHROUGH) && (clauses = clauses->next)); |
Chet Ramey | 89a9286 | 2011-11-21 20:49:12 -0500 | [diff] [blame] | 3298 | if (clauses == 0 || (clauses->flags & CASEPAT_TESTNEXT) == 0) |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3299 | EXIT_CASE (); |
| 3300 | else |
| 3301 | break; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3302 | } |
| 3303 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3304 | QUIT; |
| 3305 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3306 | } |
| 3307 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3308 | exit_case_command: |
| 3309 | free (word); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3310 | discard_unwind_frame ("case"); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3311 | line_number = save_line_number; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3312 | return (retval); |
| 3313 | } |
| 3314 | |
| 3315 | #define CMD_WHILE 0 |
| 3316 | #define CMD_UNTIL 1 |
| 3317 | |
| 3318 | /* The WHILE command. Syntax: WHILE test DO action; DONE. |
| 3319 | Repeatedly execute action while executing test produces |
| 3320 | EXECUTION_SUCCESS. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3321 | static int |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3322 | execute_while_command (while_command) |
| 3323 | WHILE_COM *while_command; |
| 3324 | { |
| 3325 | return (execute_while_or_until (while_command, CMD_WHILE)); |
| 3326 | } |
| 3327 | |
| 3328 | /* UNTIL is just like WHILE except that the test result is negated. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3329 | static int |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3330 | execute_until_command (while_command) |
| 3331 | WHILE_COM *while_command; |
| 3332 | { |
| 3333 | return (execute_while_or_until (while_command, CMD_UNTIL)); |
| 3334 | } |
| 3335 | |
| 3336 | /* The body for both while and until. The only difference between the |
| 3337 | two is that the test value is treated differently. TYPE is |
| 3338 | CMD_WHILE or CMD_UNTIL. The return value for both commands should |
| 3339 | be EXECUTION_SUCCESS if no commands in the body are executed, and |
| 3340 | the status of the last command executed in the body otherwise. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3341 | static int |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3342 | execute_while_or_until (while_command, type) |
| 3343 | WHILE_COM *while_command; |
| 3344 | int type; |
| 3345 | { |
| 3346 | int return_value, body_status; |
| 3347 | |
| 3348 | body_status = EXECUTION_SUCCESS; |
| 3349 | loop_level++; |
| 3350 | |
| 3351 | while_command->test->flags |= CMD_IGNORE_RETURN; |
| 3352 | if (while_command->flags & CMD_IGNORE_RETURN) |
| 3353 | while_command->action->flags |= CMD_IGNORE_RETURN; |
| 3354 | |
| 3355 | while (1) |
| 3356 | { |
| 3357 | return_value = execute_command (while_command->test); |
| 3358 | REAP (); |
| 3359 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3360 | /* Need to handle `break' in the test when we would break out of the |
| 3361 | loop. The job control code will set `breaking' to loop_level |
| 3362 | when a job in a loop is stopped with SIGTSTP. If the stopped job |
| 3363 | is in the loop test, `breaking' will not be reset unless we do |
| 3364 | this, and the shell will cease to execute commands. */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3365 | if (type == CMD_WHILE && return_value != EXECUTION_SUCCESS) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3366 | { |
| 3367 | if (breaking) |
| 3368 | breaking--; |
| 3369 | break; |
| 3370 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3371 | if (type == CMD_UNTIL && return_value == EXECUTION_SUCCESS) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3372 | { |
| 3373 | if (breaking) |
| 3374 | breaking--; |
| 3375 | break; |
| 3376 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3377 | |
| 3378 | QUIT; |
| 3379 | body_status = execute_command (while_command->action); |
| 3380 | QUIT; |
| 3381 | |
| 3382 | if (breaking) |
| 3383 | { |
| 3384 | breaking--; |
| 3385 | break; |
| 3386 | } |
| 3387 | |
| 3388 | if (continuing) |
| 3389 | { |
| 3390 | continuing--; |
| 3391 | if (continuing) |
| 3392 | break; |
| 3393 | } |
| 3394 | } |
| 3395 | loop_level--; |
| 3396 | |
| 3397 | return (body_status); |
| 3398 | } |
| 3399 | |
| 3400 | /* IF test THEN command [ELSE command]. |
| 3401 | IF also allows ELIF in the place of ELSE IF, but |
| 3402 | the parser makes *that* stupidity transparent. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3403 | static int |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3404 | execute_if_command (if_command) |
| 3405 | IF_COM *if_command; |
| 3406 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3407 | int return_value, save_line_number; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3408 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3409 | save_line_number = line_number; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3410 | if_command->test->flags |= CMD_IGNORE_RETURN; |
| 3411 | return_value = execute_command (if_command->test); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3412 | line_number = save_line_number; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3413 | |
| 3414 | if (return_value == EXECUTION_SUCCESS) |
| 3415 | { |
| 3416 | QUIT; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3417 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3418 | if (if_command->true_case && (if_command->flags & CMD_IGNORE_RETURN)) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3419 | if_command->true_case->flags |= CMD_IGNORE_RETURN; |
| 3420 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3421 | return (execute_command (if_command->true_case)); |
| 3422 | } |
| 3423 | else |
| 3424 | { |
| 3425 | QUIT; |
| 3426 | |
| 3427 | if (if_command->false_case && (if_command->flags & CMD_IGNORE_RETURN)) |
| 3428 | if_command->false_case->flags |= CMD_IGNORE_RETURN; |
| 3429 | |
| 3430 | return (execute_command (if_command->false_case)); |
| 3431 | } |
| 3432 | } |
| 3433 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3434 | #if defined (DPAREN_ARITHMETIC) |
| 3435 | static int |
| 3436 | execute_arith_command (arith_command) |
| 3437 | ARITH_COM *arith_command; |
| 3438 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3439 | int expok, save_line_number, retval; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3440 | intmax_t expresult; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3441 | WORD_LIST *new; |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 3442 | char *exp; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3443 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3444 | expresult = 0; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3445 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3446 | save_line_number = line_number; |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 3447 | this_command_name = "(("; /* )) */ |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3448 | line_number = arith_command->line; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3449 | /* If we're in a function, update the line number information. */ |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3450 | if (variable_context && interactive_shell) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3451 | line_number -= function_line_number; |
| 3452 | |
| 3453 | command_string_index = 0; |
| 3454 | print_arith_command (arith_command->exp); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3455 | |
| 3456 | if (signal_in_progress (DEBUG_TRAP) == 0) |
| 3457 | { |
| 3458 | FREE (the_printed_command_except_trap); |
| 3459 | the_printed_command_except_trap = savestring (the_printed_command); |
| 3460 | } |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3461 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3462 | /* Run the debug trap before each arithmetic command, but do it after we |
| 3463 | update the line number information and before we expand the various |
| 3464 | words in the expression. */ |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3465 | retval = run_debug_trap (); |
| 3466 | #if defined (DEBUGGER) |
| 3467 | /* In debugging mode, if the DEBUG trap returns a non-zero status, we |
| 3468 | skip the command. */ |
| 3469 | if (debugging_mode && retval != EXECUTION_SUCCESS) |
| 3470 | { |
| 3471 | line_number = save_line_number; |
| 3472 | return (EXECUTION_SUCCESS); |
| 3473 | } |
| 3474 | #endif |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3475 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3476 | new = expand_words_no_vars (arith_command->exp); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3477 | |
| 3478 | /* If we're tracing, make a new word list with `((' at the front and `))' |
| 3479 | at the back and print it. */ |
| 3480 | if (echo_command_at_execute) |
| 3481 | xtrace_print_arith_cmd (new); |
| 3482 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3483 | if (new) |
| 3484 | { |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 3485 | exp = new->next ? string_list (new) : new->word->word; |
| 3486 | expresult = evalexp (exp, &expok); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3487 | line_number = save_line_number; |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 3488 | if (exp != new->word->word) |
| 3489 | free (exp); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3490 | dispose_words (new); |
| 3491 | } |
| 3492 | else |
| 3493 | { |
| 3494 | expresult = 0; |
| 3495 | expok = 1; |
| 3496 | } |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3497 | |
| 3498 | if (expok == 0) |
| 3499 | return (EXECUTION_FAILURE); |
| 3500 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3501 | return (expresult == 0 ? EXECUTION_FAILURE : EXECUTION_SUCCESS); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3502 | } |
| 3503 | #endif /* DPAREN_ARITHMETIC */ |
| 3504 | |
| 3505 | #if defined (COND_COMMAND) |
| 3506 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3507 | static char * const nullstr = ""; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3508 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3509 | /* XXX - can COND ever be NULL when this is called? */ |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3510 | static int |
| 3511 | execute_cond_node (cond) |
| 3512 | COND_COM *cond; |
| 3513 | { |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3514 | int result, invert, patmatch, rmatch, mflags, ignore; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3515 | char *arg1, *arg2; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3516 | #if 0 |
| 3517 | char *t1, *t2; |
| 3518 | #endif |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3519 | |
| 3520 | invert = (cond->flags & CMD_INVERT_RETURN); |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3521 | ignore = (cond->flags & CMD_IGNORE_RETURN); |
| 3522 | if (ignore) |
| 3523 | { |
| 3524 | if (cond->left) |
| 3525 | cond->left->flags |= CMD_IGNORE_RETURN; |
| 3526 | if (cond->right) |
| 3527 | cond->right->flags |= CMD_IGNORE_RETURN; |
| 3528 | } |
| 3529 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3530 | if (cond->type == COND_EXPR) |
| 3531 | result = execute_cond_node (cond->left); |
| 3532 | else if (cond->type == COND_OR) |
| 3533 | { |
| 3534 | result = execute_cond_node (cond->left); |
| 3535 | if (result != EXECUTION_SUCCESS) |
| 3536 | result = execute_cond_node (cond->right); |
| 3537 | } |
| 3538 | else if (cond->type == COND_AND) |
| 3539 | { |
| 3540 | result = execute_cond_node (cond->left); |
| 3541 | if (result == EXECUTION_SUCCESS) |
| 3542 | result = execute_cond_node (cond->right); |
| 3543 | } |
| 3544 | else if (cond->type == COND_UNARY) |
| 3545 | { |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3546 | if (ignore) |
| 3547 | comsub_ignore_return++; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3548 | arg1 = cond_expand_word (cond->left->op, 0); |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3549 | if (ignore) |
| 3550 | comsub_ignore_return--; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3551 | if (arg1 == 0) |
| 3552 | arg1 = nullstr; |
| 3553 | if (echo_command_at_execute) |
| 3554 | xtrace_print_cond_term (cond->type, invert, cond->op, arg1, (char *)NULL); |
| 3555 | result = unary_test (cond->op->word, arg1) ? EXECUTION_SUCCESS : EXECUTION_FAILURE; |
| 3556 | if (arg1 != nullstr) |
| 3557 | free (arg1); |
| 3558 | } |
| 3559 | else if (cond->type == COND_BINARY) |
| 3560 | { |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 3561 | rmatch = 0; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3562 | patmatch = (((cond->op->word[1] == '=') && (cond->op->word[2] == '\0') && |
| 3563 | (cond->op->word[0] == '!' || cond->op->word[0] == '=')) || |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 3564 | (cond->op->word[0] == '=' && cond->op->word[1] == '\0')); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3565 | #if defined (COND_REGEXP) |
| 3566 | rmatch = (cond->op->word[0] == '=' && cond->op->word[1] == '~' && |
| 3567 | cond->op->word[2] == '\0'); |
| 3568 | #endif |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3569 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3570 | if (ignore) |
| 3571 | comsub_ignore_return++; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3572 | arg1 = cond_expand_word (cond->left->op, 0); |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3573 | if (ignore) |
| 3574 | comsub_ignore_return--; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3575 | if (arg1 == 0) |
| 3576 | arg1 = nullstr; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3577 | if (ignore) |
| 3578 | comsub_ignore_return++; |
Jari Aalto | f1be666 | 2008-11-18 13:15:12 +0000 | [diff] [blame] | 3579 | arg2 = cond_expand_word (cond->right->op, |
| 3580 | (rmatch && shell_compatibility_level > 31) ? 2 : (patmatch ? 1 : 0)); |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3581 | if (ignore) |
| 3582 | comsub_ignore_return--; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3583 | if (arg2 == 0) |
| 3584 | arg2 = nullstr; |
| 3585 | |
| 3586 | if (echo_command_at_execute) |
| 3587 | xtrace_print_cond_term (cond->type, invert, cond->op, arg1, arg2); |
| 3588 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3589 | #if defined (COND_REGEXP) |
| 3590 | if (rmatch) |
| 3591 | { |
| 3592 | mflags = SHMAT_PWARN; |
| 3593 | #if defined (ARRAY_VARS) |
| 3594 | mflags |= SHMAT_SUBEXP; |
| 3595 | #endif |
| 3596 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3597 | #if 0 |
| 3598 | t1 = strescape(arg1); |
| 3599 | t2 = strescape(arg2); |
| 3600 | itrace("execute_cond_node: sh_regmatch on `%s' and `%s'", t1, t2); |
| 3601 | free(t1); |
| 3602 | free(t2); |
| 3603 | #endif |
| 3604 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3605 | result = sh_regmatch (arg1, arg2, mflags); |
| 3606 | } |
| 3607 | else |
| 3608 | #endif /* COND_REGEXP */ |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3609 | { |
| 3610 | int oe; |
| 3611 | oe = extended_glob; |
| 3612 | extended_glob = 1; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3613 | result = binary_test (cond->op->word, arg1, arg2, TEST_PATMATCH|TEST_ARITHEXP|TEST_LOCALE) |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3614 | ? EXECUTION_SUCCESS |
| 3615 | : EXECUTION_FAILURE; |
| 3616 | extended_glob = oe; |
| 3617 | } |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3618 | if (arg1 != nullstr) |
| 3619 | free (arg1); |
| 3620 | if (arg2 != nullstr) |
| 3621 | free (arg2); |
| 3622 | } |
| 3623 | else |
| 3624 | { |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 3625 | command_error ("execute_cond_node", CMDERR_BADTYPE, cond->type, 0); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3626 | jump_to_top_level (DISCARD); |
| 3627 | result = EXECUTION_FAILURE; |
| 3628 | } |
| 3629 | |
| 3630 | if (invert) |
| 3631 | result = (result == EXECUTION_SUCCESS) ? EXECUTION_FAILURE : EXECUTION_SUCCESS; |
| 3632 | |
| 3633 | return result; |
| 3634 | } |
| 3635 | |
| 3636 | static int |
| 3637 | execute_cond_command (cond_command) |
| 3638 | COND_COM *cond_command; |
| 3639 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3640 | int retval, save_line_number; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3641 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3642 | retval = EXECUTION_SUCCESS; |
| 3643 | save_line_number = line_number; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3644 | |
| 3645 | this_command_name = "[["; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3646 | line_number = cond_command->line; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3647 | /* If we're in a function, update the line number information. */ |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3648 | if (variable_context && interactive_shell) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3649 | line_number -= function_line_number; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3650 | command_string_index = 0; |
| 3651 | print_cond_command (cond_command); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3652 | |
| 3653 | if (signal_in_progress (DEBUG_TRAP) == 0) |
| 3654 | { |
| 3655 | FREE (the_printed_command_except_trap); |
| 3656 | the_printed_command_except_trap = savestring (the_printed_command); |
| 3657 | } |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3658 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3659 | /* Run the debug trap before each conditional command, but do it after we |
| 3660 | update the line number information. */ |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3661 | retval = run_debug_trap (); |
| 3662 | #if defined (DEBUGGER) |
| 3663 | /* In debugging mode, if the DEBUG trap returns a non-zero status, we |
| 3664 | skip the command. */ |
| 3665 | if (debugging_mode && retval != EXECUTION_SUCCESS) |
| 3666 | { |
| 3667 | line_number = save_line_number; |
| 3668 | return (EXECUTION_SUCCESS); |
| 3669 | } |
| 3670 | #endif |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3671 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3672 | #if 0 |
| 3673 | debug_print_cond_command (cond_command); |
| 3674 | #endif |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3675 | |
| 3676 | last_command_exit_value = retval = execute_cond_node (cond_command); |
| 3677 | line_number = save_line_number; |
| 3678 | return (retval); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3679 | } |
| 3680 | #endif /* COND_COMMAND */ |
| 3681 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3682 | static void |
| 3683 | bind_lastarg (arg) |
| 3684 | char *arg; |
| 3685 | { |
| 3686 | SHELL_VAR *var; |
| 3687 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3688 | if (arg == 0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3689 | arg = ""; |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3690 | var = bind_variable ("_", arg, 0); |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 3691 | VUNSETATTR (var, att_exported); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3692 | } |
| 3693 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3694 | /* Execute a null command. Fork a subshell if the command uses pipes or is |
| 3695 | to be run asynchronously. This handles all the side effects that are |
| 3696 | supposed to take place. */ |
| 3697 | static int |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3698 | execute_null_command (redirects, pipe_in, pipe_out, async) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3699 | REDIRECT *redirects; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 3700 | int pipe_in, pipe_out, async; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3701 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3702 | int r; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3703 | int forcefork; |
| 3704 | REDIRECT *rd; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3705 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3706 | for (forcefork = 0, rd = redirects; rd; rd = rd->next) |
| 3707 | forcefork += rd->rflags & REDIR_VARASSIGN; |
| 3708 | |
| 3709 | if (forcefork || pipe_in != NO_PIPE || pipe_out != NO_PIPE || async) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3710 | { |
| 3711 | /* We have a null command, but we really want a subshell to take |
| 3712 | care of it. Just fork, do piping and redirections, and exit. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3713 | if (make_child ((char *)NULL, async) == 0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3714 | { |
| 3715 | /* Cancel traps, in trap.c. */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3716 | restore_original_signals (); /* XXX */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3717 | |
| 3718 | do_piping (pipe_in, pipe_out); |
| 3719 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3720 | #if defined (COPROCESS_SUPPORT) |
| 3721 | coproc_closeall (); |
| 3722 | #endif |
| 3723 | |
| 3724 | subshell_environment = 0; |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 3725 | if (async) |
| 3726 | subshell_environment |= SUBSHELL_ASYNC; |
| 3727 | if (pipe_in != NO_PIPE || pipe_out != NO_PIPE) |
| 3728 | subshell_environment |= SUBSHELL_PIPE; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3729 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3730 | if (do_redirections (redirects, RX_ACTIVE) == 0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3731 | exit (EXECUTION_SUCCESS); |
| 3732 | else |
| 3733 | exit (EXECUTION_FAILURE); |
| 3734 | } |
| 3735 | else |
| 3736 | { |
| 3737 | close_pipes (pipe_in, pipe_out); |
| 3738 | #if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3739 | if (pipe_out == NO_PIPE) |
| 3740 | unlink_fifo_list (); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3741 | #endif |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3742 | return (EXECUTION_SUCCESS); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3743 | } |
| 3744 | } |
| 3745 | else |
| 3746 | { |
| 3747 | /* Even if there aren't any command names, pretend to do the |
| 3748 | redirections that are specified. The user expects the side |
| 3749 | effects to take place. If the redirections fail, then return |
| 3750 | failure. Otherwise, if a command substitution took place while |
| 3751 | expanding the command or a redirection, return the value of that |
| 3752 | substitution. Otherwise, return EXECUTION_SUCCESS. */ |
| 3753 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3754 | r = do_redirections (redirects, RX_ACTIVE|RX_UNDOABLE); |
| 3755 | cleanup_redirects (redirection_undo_list); |
| 3756 | redirection_undo_list = (REDIRECT *)NULL; |
| 3757 | |
| 3758 | if (r != 0) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3759 | return (EXECUTION_FAILURE); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3760 | else if (last_command_subst_pid != NO_PID) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3761 | return (last_command_exit_value); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3762 | else |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3763 | return (EXECUTION_SUCCESS); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 3764 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3765 | } |
| 3766 | |
| 3767 | /* This is a hack to suppress word splitting for assignment statements |
| 3768 | given as arguments to builtins with the ASSIGNMENT_BUILTIN flag set. */ |
| 3769 | static void |
| 3770 | fix_assignment_words (words) |
| 3771 | WORD_LIST *words; |
| 3772 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3773 | WORD_LIST *w, *wcmd; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3774 | struct builtin *b; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3775 | int assoc, global, array, integer; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3776 | |
| 3777 | if (words == 0) |
| 3778 | return; |
| 3779 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3780 | b = 0; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3781 | assoc = global = array = integer = 0; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3782 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3783 | /* Skip over assignment statements preceding a command name */ |
| 3784 | wcmd = words; |
| 3785 | for (wcmd = words; wcmd; wcmd = wcmd->next) |
| 3786 | if ((wcmd->word->flags & W_ASSIGNMENT) == 0) |
| 3787 | break; |
| 3788 | |
| 3789 | for (w = wcmd; w; w = w->next) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3790 | if (w->word->flags & W_ASSIGNMENT) |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3791 | { |
| 3792 | if (b == 0) |
| 3793 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3794 | /* Posix (post-2008) says that `command' doesn't change whether |
| 3795 | or not the builtin it shadows is a `declaration command', even |
| 3796 | though it removes other special builtin properties. In Posix |
| 3797 | mode, we skip over one or more instances of `command' and |
| 3798 | deal with the next word as the assignment builtin. */ |
| 3799 | while (posixly_correct && wcmd && wcmd->word && wcmd->word->word && STREQ (wcmd->word->word, "command")) |
| 3800 | wcmd = wcmd->next; |
| 3801 | b = builtin_address_internal (wcmd->word->word, 0); |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3802 | if (b == 0 || (b->flags & ASSIGNMENT_BUILTIN) == 0) |
| 3803 | return; |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3804 | else if (b && (b->flags & ASSIGNMENT_BUILTIN)) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3805 | wcmd->word->flags |= W_ASSNBLTIN; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3806 | } |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3807 | w->word->flags |= (W_NOSPLIT|W_NOGLOB|W_TILDEEXP|W_ASSIGNARG); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3808 | #if defined (ARRAY_VARS) |
| 3809 | if (assoc) |
| 3810 | w->word->flags |= W_ASSIGNASSOC; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3811 | if (array) |
| 3812 | w->word->flags |= W_ASSIGNARRAY; |
| 3813 | #endif |
Chet Ramey | 6d41b71 | 2012-05-07 16:22:49 -0400 | [diff] [blame] | 3814 | if (global) |
| 3815 | w->word->flags |= W_ASSNGLOBAL; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3816 | if (integer) |
| 3817 | w->word->flags |= W_ASSIGNINT; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3818 | } |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3819 | #if defined (ARRAY_VARS) |
| 3820 | /* Note that we saw an associative array option to a builtin that takes |
| 3821 | assignment statements. This is a bit of a kludge. */ |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3822 | else if (w->word->word[0] == '-' && (strchr (w->word->word+1, 'A') || strchr (w->word->word+1, 'a') || strchr (w->word->word+1, 'g'))) |
Chet Ramey | 6d41b71 | 2012-05-07 16:22:49 -0400 | [diff] [blame] | 3823 | #else |
| 3824 | else if (w->word->word[0] == '-' && strchr (w->word->word+1, 'g')) |
| 3825 | #endif |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3826 | { |
| 3827 | if (b == 0) |
| 3828 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3829 | while (posixly_correct && wcmd && wcmd->word && wcmd->word->word && STREQ (wcmd->word->word, "command")) |
| 3830 | wcmd = wcmd->next; |
| 3831 | b = builtin_address_internal (wcmd->word->word, 0); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3832 | if (b == 0 || (b->flags & ASSIGNMENT_BUILTIN) == 0) |
| 3833 | return; |
| 3834 | else if (b && (b->flags & ASSIGNMENT_BUILTIN)) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3835 | wcmd->word->flags |= W_ASSNBLTIN; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3836 | } |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3837 | if ((wcmd->word->flags & W_ASSNBLTIN) && strchr (w->word->word+1, 'A')) |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3838 | assoc = 1; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3839 | else if ((wcmd->word->flags & W_ASSNBLTIN) && strchr (w->word->word+1, 'a')) |
| 3840 | array = 1; |
| 3841 | if ((wcmd->word->flags & W_ASSNBLTIN) && strchr (w->word->word+1, 'g')) |
Chet Ramey | 6d41b71 | 2012-05-07 16:22:49 -0400 | [diff] [blame] | 3842 | global = 1; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3843 | if ((wcmd->word->flags & W_ASSNBLTIN) && strchr (w->word->word+1, 'i')) |
| 3844 | integer = 1; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3845 | } |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3846 | } |
| 3847 | |
| 3848 | /* Return 1 if the file found by searching $PATH for PATHNAME, defaulting |
| 3849 | to PATHNAME, is a directory. Used by the autocd code below. */ |
| 3850 | static int |
| 3851 | is_dirname (pathname) |
| 3852 | char *pathname; |
| 3853 | { |
| 3854 | char *temp; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3855 | int ret; |
| 3856 | |
| 3857 | temp = search_for_command (pathname, 0); |
| 3858 | ret = (temp ? file_isdir (temp) : file_isdir (pathname)); |
| 3859 | free (temp); |
| 3860 | return ret; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3861 | } |
| 3862 | |
| 3863 | /* The meaty part of all the executions. We have to start hacking the |
| 3864 | real execution of commands here. Fork a process, set things up, |
| 3865 | execute the command. */ |
| 3866 | static int |
| 3867 | execute_simple_command (simple_command, pipe_in, pipe_out, async, fds_to_close) |
| 3868 | SIMPLE_COM *simple_command; |
| 3869 | int pipe_in, pipe_out, async; |
| 3870 | struct fd_bitmap *fds_to_close; |
| 3871 | { |
| 3872 | WORD_LIST *words, *lastword; |
| 3873 | char *command_line, *lastarg, *temp; |
Jari Aalto | bc4cd23 | 1998-07-23 14:37:54 +0000 | [diff] [blame] | 3874 | int first_word_quoted, result, builtin_is_special, already_forked, dofork; |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3875 | pid_t old_last_async_pid; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3876 | sh_builtin_func_t *builtin; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3877 | SHELL_VAR *func; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 3878 | volatile int old_builtin, old_command_builtin; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3879 | |
| 3880 | result = EXECUTION_SUCCESS; |
| 3881 | special_builtin_failed = builtin_is_special = 0; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3882 | command_line = (char *)0; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3883 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3884 | QUIT; |
| 3885 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3886 | /* If we're in a function, update the line number information. */ |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 3887 | if (variable_context && interactive_shell && sourcelevel == 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3888 | line_number -= function_line_number; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 3889 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3890 | /* Remember what this command line looks like at invocation. */ |
| 3891 | command_string_index = 0; |
| 3892 | print_simple_command (simple_command); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3893 | |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 3894 | #if 0 |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3895 | if (signal_in_progress (DEBUG_TRAP) == 0 && (this_command_name == 0 || (STREQ (this_command_name, "trap") == 0))) |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 3896 | #else |
| 3897 | if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0) |
| 3898 | #endif |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3899 | { |
| 3900 | FREE (the_printed_command_except_trap); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3901 | the_printed_command_except_trap = the_printed_command ? savestring (the_printed_command) : (char *)0; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 3902 | } |
| 3903 | |
| 3904 | /* Run the debug trap before each simple command, but do it after we |
| 3905 | update the line number information. */ |
| 3906 | result = run_debug_trap (); |
| 3907 | #if defined (DEBUGGER) |
| 3908 | /* In debugging mode, if the DEBUG trap returns a non-zero status, we |
| 3909 | skip the command. */ |
| 3910 | if (debugging_mode && result != EXECUTION_SUCCESS) |
| 3911 | return (EXECUTION_SUCCESS); |
| 3912 | #endif |
| 3913 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3914 | first_word_quoted = |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3915 | simple_command->words ? (simple_command->words->word->flags & W_QUOTED) : 0; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3916 | |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3917 | last_command_subst_pid = NO_PID; |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 3918 | old_last_async_pid = last_asynchronous_pid; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3919 | |
Jari Aalto | bc4cd23 | 1998-07-23 14:37:54 +0000 | [diff] [blame] | 3920 | already_forked = dofork = 0; |
| 3921 | |
| 3922 | /* If we're in a pipeline or run in the background, set DOFORK so we |
| 3923 | make the child early, before word expansion. This keeps assignment |
| 3924 | statements from affecting the parent shell's environment when they |
| 3925 | should not. */ |
| 3926 | dofork = pipe_in != NO_PIPE || pipe_out != NO_PIPE || async; |
| 3927 | |
| 3928 | /* Something like `%2 &' should restart job 2 in the background, not cause |
| 3929 | the shell to fork here. */ |
| 3930 | if (dofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE && |
| 3931 | simple_command->words && simple_command->words->word && |
| 3932 | simple_command->words->word->word && |
| 3933 | (simple_command->words->word->word[0] == '%')) |
| 3934 | dofork = 0; |
| 3935 | |
| 3936 | if (dofork) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3937 | { |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 3938 | /* Do this now, because execute_disk_command will do it anyway in the |
| 3939 | vast majority of cases. */ |
| 3940 | maybe_make_export_env (); |
| 3941 | |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3942 | /* Don't let a DEBUG trap overwrite the command string to be saved with |
| 3943 | the process/job associated with this child. */ |
| 3944 | if (make_child (savestring (the_printed_command_except_trap), async) == 0) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3945 | { |
| 3946 | already_forked = 1; |
| 3947 | simple_command->flags |= CMD_NO_FORK; |
| 3948 | |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 3949 | subshell_environment = SUBSHELL_FORK; |
| 3950 | if (pipe_in != NO_PIPE || pipe_out != NO_PIPE) |
| 3951 | subshell_environment |= SUBSHELL_PIPE; |
| 3952 | if (async) |
| 3953 | subshell_environment |= SUBSHELL_ASYNC; |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 3954 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 3955 | /* We need to do this before piping to handle some really |
| 3956 | pathological cases where one of the pipe file descriptors |
| 3957 | is < 2. */ |
| 3958 | if (fds_to_close) |
| 3959 | close_fd_bitmap (fds_to_close); |
| 3960 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3961 | do_piping (pipe_in, pipe_out); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 3962 | pipe_in = pipe_out = NO_PIPE; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3963 | #if defined (COPROCESS_SUPPORT) |
| 3964 | coproc_closeall (); |
| 3965 | #endif |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3966 | |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 3967 | last_asynchronous_pid = old_last_async_pid; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3968 | |
| 3969 | CHECK_SIGTERM; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3970 | } |
| 3971 | else |
| 3972 | { |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 3973 | /* Don't let simple commands that aren't the last command in a |
| 3974 | pipeline change $? for the rest of the pipeline (or at all). */ |
| 3975 | if (pipe_out != NO_PIPE) |
| 3976 | result = last_command_exit_value; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3977 | close_pipes (pipe_in, pipe_out); |
| 3978 | #if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 3979 | /* Close /dev/fd file descriptors in the parent after forking the |
| 3980 | last child in a (possibly one-element) pipeline. Defer this |
| 3981 | until any running shell function completes. */ |
| 3982 | if (pipe_out == NO_PIPE && variable_context == 0) /* XXX */ |
| 3983 | unlink_fifo_list (); /* XXX */ |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 3984 | #endif |
| 3985 | command_line = (char *)NULL; /* don't free this. */ |
| 3986 | bind_lastarg ((char *)NULL); |
| 3987 | return (result); |
| 3988 | } |
| 3989 | } |
| 3990 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 3991 | /* If we are re-running this as the result of executing the `command' |
| 3992 | builtin, do not expand the command words a second time. */ |
| 3993 | if ((simple_command->flags & CMD_INHIBIT_EXPANSION) == 0) |
| 3994 | { |
| 3995 | current_fds_to_close = fds_to_close; |
| 3996 | fix_assignment_words (simple_command->words); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3997 | /* Pass the ignore return flag down to command substitutions */ |
| 3998 | if (simple_command->flags & CMD_IGNORE_RETURN) /* XXX */ |
| 3999 | comsub_ignore_return++; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4000 | words = expand_words (simple_command->words); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4001 | if (simple_command->flags & CMD_IGNORE_RETURN) |
| 4002 | comsub_ignore_return--; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4003 | current_fds_to_close = (struct fd_bitmap *)NULL; |
| 4004 | } |
| 4005 | else |
| 4006 | words = copy_word_list (simple_command->words); |
| 4007 | |
| 4008 | /* It is possible for WORDS not to have anything left in it. |
| 4009 | Perhaps all the words consisted of `$foo', and there was |
| 4010 | no variable `$foo'. */ |
| 4011 | if (words == 0) |
| 4012 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4013 | this_command_name = 0; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4014 | result = execute_null_command (simple_command->redirects, |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4015 | pipe_in, pipe_out, |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4016 | already_forked ? 0 : async); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4017 | if (already_forked) |
| 4018 | exit (result); |
| 4019 | else |
| 4020 | { |
| 4021 | bind_lastarg ((char *)NULL); |
| 4022 | set_pipestatus_from_exit (result); |
| 4023 | return (result); |
| 4024 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4025 | } |
| 4026 | |
| 4027 | lastarg = (char *)NULL; |
| 4028 | |
| 4029 | begin_unwind_frame ("simple-command"); |
| 4030 | |
| 4031 | if (echo_command_at_execute) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4032 | xtrace_print_word_list (words, 1); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4033 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4034 | builtin = (sh_builtin_func_t *)NULL; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4035 | func = (SHELL_VAR *)NULL; |
| 4036 | if ((simple_command->flags & CMD_NO_FUNCTIONS) == 0) |
| 4037 | { |
| 4038 | /* Posix.2 says special builtins are found before functions. We |
| 4039 | don't set builtin_is_special anywhere other than here, because |
| 4040 | this path is followed only when the `command' builtin is *not* |
| 4041 | being used, and we don't want to exit the shell if a special |
| 4042 | builtin executed with `command builtin' fails. `command' is not |
| 4043 | a special builtin. */ |
| 4044 | if (posixly_correct) |
| 4045 | { |
| 4046 | builtin = find_special_builtin (words->word->word); |
| 4047 | if (builtin) |
| 4048 | builtin_is_special = 1; |
| 4049 | } |
| 4050 | if (builtin == 0) |
| 4051 | func = find_function (words->word->word); |
| 4052 | } |
| 4053 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4054 | /* In POSIX mode, assignment errors in the temporary environment cause a |
| 4055 | non-interactive shell to exit. */ |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4056 | if (posixly_correct && builtin_is_special && interactive_shell == 0 && tempenv_assign_error) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4057 | { |
| 4058 | last_command_exit_value = EXECUTION_FAILURE; |
| 4059 | jump_to_top_level (ERREXIT); |
| 4060 | } |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4061 | tempenv_assign_error = 0; /* don't care about this any more */ |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4062 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4063 | add_unwind_protect (dispose_words, words); |
| 4064 | QUIT; |
| 4065 | |
| 4066 | /* Bind the last word in this command to "$_" after execution. */ |
| 4067 | for (lastword = words; lastword->next; lastword = lastword->next) |
| 4068 | ; |
| 4069 | lastarg = lastword->word->word; |
| 4070 | |
| 4071 | #if defined (JOB_CONTROL) |
| 4072 | /* Is this command a job control related thing? */ |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4073 | if (words->word->word[0] == '%' && already_forked == 0) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4074 | { |
| 4075 | this_command_name = async ? "bg" : "fg"; |
| 4076 | last_shell_builtin = this_shell_builtin; |
| 4077 | this_shell_builtin = builtin_address (this_command_name); |
| 4078 | result = (*this_shell_builtin) (words); |
| 4079 | goto return_result; |
| 4080 | } |
| 4081 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4082 | /* One other possibililty. The user may want to resume an existing job. |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4083 | If they do, find out whether this word is a candidate for a running |
| 4084 | job. */ |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4085 | if (job_control && already_forked == 0 && async == 0 && |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4086 | !first_word_quoted && |
| 4087 | !words->next && |
| 4088 | words->word->word[0] && |
| 4089 | !simple_command->redirects && |
| 4090 | pipe_in == NO_PIPE && |
| 4091 | pipe_out == NO_PIPE && |
| 4092 | (temp = get_string_value ("auto_resume"))) |
| 4093 | { |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4094 | int job, jflags, started_status; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4095 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4096 | jflags = JM_STOPPED|JM_FIRSTMATCH; |
| 4097 | if (STREQ (temp, "exact")) |
| 4098 | jflags |= JM_EXACT; |
| 4099 | else if (STREQ (temp, "substring")) |
| 4100 | jflags |= JM_SUBSTRING; |
| 4101 | else |
| 4102 | jflags |= JM_PREFIX; |
| 4103 | job = get_job_by_name (words->word->word, jflags); |
| 4104 | if (job != NO_JOB) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4105 | { |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4106 | run_unwind_frame ("simple-command"); |
| 4107 | this_command_name = "fg"; |
| 4108 | last_shell_builtin = this_shell_builtin; |
| 4109 | this_shell_builtin = builtin_address ("fg"); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4110 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4111 | started_status = start_job (job, 1); |
| 4112 | return ((started_status < 0) ? EXECUTION_FAILURE : started_status); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4113 | } |
| 4114 | } |
| 4115 | #endif /* JOB_CONTROL */ |
| 4116 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4117 | run_builtin: |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4118 | /* Remember the name of this command globally. */ |
| 4119 | this_command_name = words->word->word; |
| 4120 | |
| 4121 | QUIT; |
| 4122 | |
| 4123 | /* This command could be a shell builtin or a user-defined function. |
| 4124 | We have already found special builtins by this time, so we do not |
| 4125 | set builtin_is_special. If this is a function or builtin, and we |
| 4126 | have pipes, then fork a subshell in here. Otherwise, just execute |
| 4127 | the command directly. */ |
| 4128 | if (func == 0 && builtin == 0) |
| 4129 | builtin = find_shell_builtin (this_command_name); |
| 4130 | |
| 4131 | last_shell_builtin = this_shell_builtin; |
| 4132 | this_shell_builtin = builtin; |
| 4133 | |
| 4134 | if (builtin || func) |
| 4135 | { |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4136 | if (builtin) |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4137 | { |
| 4138 | old_builtin = executing_builtin; |
| 4139 | old_command_builtin = executing_command_builtin; |
| 4140 | unwind_protect_int (executing_builtin); /* modified in execute_builtin */ |
| 4141 | unwind_protect_int (executing_command_builtin); /* ditto */ |
| 4142 | } |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 4143 | if (already_forked) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4144 | { |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4145 | /* reset_terminating_signals (); */ /* XXX */ |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4146 | /* Reset the signal handlers in the child, but don't free the |
| 4147 | trap strings. Set a flag noting that we have to free the |
| 4148 | trap strings if we run trap to change a signal disposition. */ |
| 4149 | reset_signal_handlers (); |
| 4150 | subshell_environment |= SUBSHELL_RESETTRAP; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4151 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4152 | if (async) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4153 | { |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4154 | if ((simple_command->flags & CMD_STDIN_REDIR) && |
| 4155 | pipe_in == NO_PIPE && |
| 4156 | (stdin_redirects (simple_command->redirects) == 0)) |
| 4157 | async_redirect_stdin (); |
| 4158 | setup_async_signals (); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4159 | } |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4160 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4161 | subshell_level++; |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4162 | execute_subshell_builtin_or_function |
| 4163 | (words, simple_command->redirects, builtin, func, |
| 4164 | pipe_in, pipe_out, async, fds_to_close, |
| 4165 | simple_command->flags); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4166 | subshell_level--; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4167 | } |
| 4168 | else |
| 4169 | { |
| 4170 | result = execute_builtin_or_function |
| 4171 | (words, builtin, func, simple_command->redirects, fds_to_close, |
| 4172 | simple_command->flags); |
| 4173 | if (builtin) |
| 4174 | { |
| 4175 | if (result > EX_SHERRBASE) |
| 4176 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4177 | switch (result) |
| 4178 | { |
| 4179 | case EX_REDIRFAIL: |
| 4180 | case EX_BADASSIGN: |
| 4181 | case EX_EXPFAIL: |
| 4182 | /* These errors cause non-interactive posix mode shells to exit */ |
| 4183 | if (posixly_correct && builtin_is_special && interactive_shell == 0) |
| 4184 | { |
| 4185 | last_command_exit_value = EXECUTION_FAILURE; |
| 4186 | jump_to_top_level (ERREXIT); |
| 4187 | } |
| 4188 | } |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4189 | result = builtin_status (result); |
| 4190 | if (builtin_is_special) |
| 4191 | special_builtin_failed = 1; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4192 | } |
| 4193 | /* In POSIX mode, if there are assignment statements preceding |
| 4194 | a special builtin, they persist after the builtin |
| 4195 | completes. */ |
| 4196 | if (posixly_correct && builtin_is_special && temporary_env) |
| 4197 | merge_temporary_env (); |
| 4198 | } |
| 4199 | else /* function */ |
| 4200 | { |
| 4201 | if (result == EX_USAGE) |
| 4202 | result = EX_BADUSAGE; |
| 4203 | else if (result > EX_SHERRBASE) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4204 | result = EXECUTION_FAILURE; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4205 | } |
| 4206 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4207 | set_pipestatus_from_exit (result); |
| 4208 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4209 | goto return_result; |
| 4210 | } |
| 4211 | } |
| 4212 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4213 | if (autocd && interactive && words->word && is_dirname (words->word->word)) |
| 4214 | { |
| 4215 | words = make_word_list (make_word ("cd"), words); |
| 4216 | xtrace_print_word_list (words, 0); |
| 4217 | goto run_builtin; |
| 4218 | } |
| 4219 | |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4220 | if (command_line == 0) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4221 | command_line = savestring (the_printed_command_except_trap ? the_printed_command_except_trap : ""); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4222 | |
Jari Aalto | f1be666 | 2008-11-18 13:15:12 +0000 | [diff] [blame] | 4223 | #if defined (PROCESS_SUBSTITUTION) |
| 4224 | if ((subshell_environment & SUBSHELL_COMSUB) && (simple_command->flags & CMD_NO_FORK) && fifos_pending() > 0) |
| 4225 | simple_command->flags &= ~CMD_NO_FORK; |
| 4226 | #endif |
| 4227 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4228 | result = execute_disk_command (words, simple_command->redirects, command_line, |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4229 | pipe_in, pipe_out, async, fds_to_close, |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 4230 | simple_command->flags); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4231 | |
| 4232 | return_result: |
| 4233 | bind_lastarg (lastarg); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4234 | FREE (command_line); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4235 | dispose_words (words); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4236 | if (builtin) |
| 4237 | { |
| 4238 | executing_builtin = old_builtin; |
| 4239 | executing_command_builtin = old_command_builtin; |
| 4240 | } |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4241 | discard_unwind_frame ("simple-command"); |
| 4242 | this_command_name = (char *)NULL; /* points to freed memory now */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4243 | return (result); |
| 4244 | } |
| 4245 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4246 | /* Translate the special builtin exit statuses. We don't really need a |
| 4247 | function for this; it's a placeholder for future work. */ |
| 4248 | static int |
| 4249 | builtin_status (result) |
| 4250 | int result; |
| 4251 | { |
| 4252 | int r; |
| 4253 | |
| 4254 | switch (result) |
| 4255 | { |
| 4256 | case EX_USAGE: |
| 4257 | r = EX_BADUSAGE; |
| 4258 | break; |
| 4259 | case EX_REDIRFAIL: |
| 4260 | case EX_BADSYNTAX: |
| 4261 | case EX_BADASSIGN: |
| 4262 | case EX_EXPFAIL: |
| 4263 | r = EXECUTION_FAILURE; |
| 4264 | break; |
| 4265 | default: |
| 4266 | r = EXECUTION_SUCCESS; |
| 4267 | break; |
| 4268 | } |
| 4269 | return (r); |
| 4270 | } |
| 4271 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4272 | static int |
| 4273 | execute_builtin (builtin, words, flags, subshell) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4274 | sh_builtin_func_t *builtin; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4275 | WORD_LIST *words; |
| 4276 | int flags, subshell; |
| 4277 | { |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 4278 | int old_e_flag, result, eval_unwind; |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4279 | int isbltinenv; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4280 | char *error_trap; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4281 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4282 | error_trap = 0; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4283 | old_e_flag = exit_immediately_on_error; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4284 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4285 | /* The eval builtin calls parse_and_execute, which does not know about |
| 4286 | the setting of flags, and always calls the execution functions with |
| 4287 | flags that will exit the shell on an error if -e is set. If the |
| 4288 | eval builtin is being called, and we're supposed to ignore the exit |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4289 | value of the command, we turn the -e flag off ourselves and disable |
| 4290 | the ERR trap, then restore them when the command completes. This is |
| 4291 | also a problem (as below) for the command and source/. builtins. */ |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4292 | if (subshell == 0 && (flags & CMD_IGNORE_RETURN) && |
| 4293 | (builtin == eval_builtin || builtin == command_builtin || builtin == source_builtin)) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4294 | { |
| 4295 | begin_unwind_frame ("eval_builtin"); |
| 4296 | unwind_protect_int (exit_immediately_on_error); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4297 | unwind_protect_int (builtin_ignoring_errexit); |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4298 | error_trap = TRAP_STRING (ERROR_TRAP); |
| 4299 | if (error_trap) |
| 4300 | { |
| 4301 | error_trap = savestring (error_trap); |
| 4302 | add_unwind_protect (xfree, error_trap); |
| 4303 | add_unwind_protect (set_error_trap, error_trap); |
| 4304 | restore_default_signal (ERROR_TRAP); |
| 4305 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4306 | exit_immediately_on_error = 0; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4307 | builtin_ignoring_errexit = 1; |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 4308 | eval_unwind = 1; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4309 | } |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 4310 | else |
| 4311 | eval_unwind = 0; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4312 | |
| 4313 | /* The temporary environment for a builtin is supposed to apply to |
| 4314 | all commands executed by that builtin. Currently, this is a |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4315 | problem only with the `unset', `source' and `eval' builtins. |
| 4316 | `mapfile' is a special case because it uses evalstring (same as |
| 4317 | eval or source) to run its callbacks. */ |
| 4318 | isbltinenv = (builtin == source_builtin || builtin == eval_builtin || builtin == unset_builtin || builtin == mapfile_builtin); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4319 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4320 | if (isbltinenv) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4321 | { |
| 4322 | if (subshell == 0) |
| 4323 | begin_unwind_frame ("builtin_env"); |
| 4324 | |
| 4325 | if (temporary_env) |
| 4326 | { |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4327 | push_scope (VC_BLTNENV, temporary_env); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4328 | if (subshell == 0) |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4329 | add_unwind_protect (pop_scope, (flags & CMD_COMMAND_BUILTIN) ? 0 : "1"); |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4330 | temporary_env = (HASH_TABLE *)NULL; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4331 | } |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 4332 | } |
| 4333 | |
| 4334 | /* `return' does a longjmp() back to a saved environment in execute_function. |
| 4335 | If a variable assignment list preceded the command, and the shell is |
| 4336 | running in POSIX mode, we need to merge that into the shell_variables |
| 4337 | table, since `return' is a POSIX special builtin. */ |
| 4338 | if (posixly_correct && subshell == 0 && builtin == return_builtin && temporary_env) |
| 4339 | { |
| 4340 | begin_unwind_frame ("return_temp_env"); |
| 4341 | add_unwind_protect (merge_temporary_env, (char *)NULL); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4342 | } |
| 4343 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4344 | executing_builtin++; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4345 | executing_command_builtin |= builtin == command_builtin; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4346 | result = ((*builtin) (words->next)); |
| 4347 | |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 4348 | /* This shouldn't happen, but in case `return' comes back instead of |
| 4349 | longjmp'ing, we need to unwind. */ |
| 4350 | if (posixly_correct && subshell == 0 && builtin == return_builtin && temporary_env) |
| 4351 | discard_unwind_frame ("return_temp_env"); |
| 4352 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4353 | if (subshell == 0 && isbltinenv) |
| 4354 | run_unwind_frame ("builtin_env"); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4355 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 4356 | if (eval_unwind) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4357 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4358 | exit_immediately_on_error = errexit_flag; |
| 4359 | builtin_ignoring_errexit = 0; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4360 | if (error_trap) |
| 4361 | { |
| 4362 | set_error_trap (error_trap); |
| 4363 | xfree (error_trap); |
| 4364 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4365 | discard_unwind_frame ("eval_builtin"); |
| 4366 | } |
| 4367 | |
| 4368 | return (result); |
| 4369 | } |
| 4370 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4371 | static int |
| 4372 | execute_function (var, words, flags, fds_to_close, async, subshell) |
| 4373 | SHELL_VAR *var; |
| 4374 | WORD_LIST *words; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4375 | int flags; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4376 | struct fd_bitmap *fds_to_close; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4377 | int async, subshell; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4378 | { |
| 4379 | int return_val, result; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4380 | COMMAND *tc, *fc, *save_current; |
| 4381 | char *debug_trap, *error_trap, *return_trap; |
| 4382 | #if defined (ARRAY_VARS) |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4383 | SHELL_VAR *funcname_v, *nfv, *bash_source_v, *bash_lineno_v; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4384 | ARRAY *funcname_a; |
| 4385 | volatile ARRAY *bash_source_a; |
| 4386 | volatile ARRAY *bash_lineno_a; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4387 | #endif |
| 4388 | FUNCTION_DEF *shell_fn; |
| 4389 | char *sfile, *t; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4390 | |
| 4391 | USE_VAR(fc); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4392 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4393 | if (funcnest_max > 0 && funcnest >= funcnest_max) |
| 4394 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4395 | internal_error (_("%s: maximum function nesting level exceeded (%d)"), var->name, funcnest); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4396 | funcnest = 0; /* XXX - should we reset it somewhere else? */ |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4397 | jump_to_top_level (DISCARD); |
| 4398 | } |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4399 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4400 | #if defined (ARRAY_VARS) |
| 4401 | GET_ARRAY_FROM_VAR ("FUNCNAME", funcname_v, funcname_a); |
| 4402 | GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v, bash_source_a); |
| 4403 | GET_ARRAY_FROM_VAR ("BASH_LINENO", bash_lineno_v, bash_lineno_a); |
| 4404 | #endif |
| 4405 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4406 | tc = (COMMAND *)copy_command (function_cell (var)); |
| 4407 | if (tc && (flags & CMD_IGNORE_RETURN)) |
| 4408 | tc->flags |= CMD_IGNORE_RETURN; |
| 4409 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4410 | if (subshell == 0) |
| 4411 | { |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4412 | begin_unwind_frame ("function_calling"); |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4413 | push_context (var->name, subshell, temporary_env); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4414 | add_unwind_protect (pop_context, (char *)NULL); |
| 4415 | unwind_protect_int (line_number); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4416 | unwind_protect_int (return_catch_flag); |
| 4417 | unwind_protect_jmp_buf (return_catch); |
| 4418 | add_unwind_protect (dispose_command, (char *)tc); |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 4419 | unwind_protect_pointer (this_shell_function); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4420 | unwind_protect_int (loop_level); |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4421 | unwind_protect_int (funcnest); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4422 | } |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 4423 | else |
| 4424 | push_context (var->name, subshell, temporary_env); /* don't unwind-protect for subshells */ |
| 4425 | |
| 4426 | temporary_env = (HASH_TABLE *)NULL; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4427 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 4428 | this_shell_function = var; |
| 4429 | make_funcname_visible (1); |
| 4430 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4431 | debug_trap = TRAP_STRING(DEBUG_TRAP); |
| 4432 | error_trap = TRAP_STRING(ERROR_TRAP); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4433 | return_trap = TRAP_STRING(RETURN_TRAP); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4434 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4435 | /* The order of the unwind protects for debug_trap, error_trap and |
| 4436 | return_trap is important here! unwind-protect commands are run |
| 4437 | in reverse order of registration. If this causes problems, take |
| 4438 | out the xfree unwind-protect calls and live with the small memory leak. */ |
| 4439 | |
| 4440 | /* function_trace_mode != 0 means that all functions inherit the DEBUG trap. |
| 4441 | if the function has the trace attribute set, it inherits the DEBUG trap */ |
| 4442 | if (debug_trap && ((trace_p (var) == 0) && function_trace_mode == 0)) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4443 | { |
| 4444 | if (subshell == 0) |
| 4445 | { |
| 4446 | debug_trap = savestring (debug_trap); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4447 | add_unwind_protect (xfree, debug_trap); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4448 | add_unwind_protect (set_debug_trap, debug_trap); |
| 4449 | } |
| 4450 | restore_default_signal (DEBUG_TRAP); |
| 4451 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4452 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4453 | /* error_trace_mode != 0 means that functions inherit the ERR trap. */ |
| 4454 | if (error_trap && error_trace_mode == 0) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4455 | { |
| 4456 | if (subshell == 0) |
| 4457 | { |
| 4458 | error_trap = savestring (error_trap); |
| 4459 | add_unwind_protect (xfree, error_trap); |
| 4460 | add_unwind_protect (set_error_trap, error_trap); |
| 4461 | } |
| 4462 | restore_default_signal (ERROR_TRAP); |
| 4463 | } |
| 4464 | |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4465 | /* Shell functions inherit the RETURN trap if function tracing is on |
| 4466 | globally or on individually for this function. */ |
| 4467 | #if 0 |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4468 | if (return_trap && ((trace_p (var) == 0) && function_trace_mode == 0)) |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4469 | #else |
| 4470 | if (return_trap && (signal_in_progress (DEBUG_TRAP) || ((trace_p (var) == 0) && function_trace_mode == 0))) |
| 4471 | #endif |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4472 | { |
| 4473 | if (subshell == 0) |
| 4474 | { |
| 4475 | return_trap = savestring (return_trap); |
| 4476 | add_unwind_protect (xfree, return_trap); |
| 4477 | add_unwind_protect (set_return_trap, return_trap); |
| 4478 | } |
| 4479 | restore_default_signal (RETURN_TRAP); |
| 4480 | } |
| 4481 | |
| 4482 | funcnest++; |
| 4483 | #if defined (ARRAY_VARS) |
| 4484 | /* This is quite similar to the code in shell.c and elsewhere. */ |
| 4485 | shell_fn = find_function_def (this_shell_function->name); |
| 4486 | sfile = shell_fn ? shell_fn->source_file : ""; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4487 | array_push ((ARRAY *)funcname_a, this_shell_function->name); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4488 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4489 | array_push ((ARRAY *)bash_source_a, sfile); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4490 | t = itos (executing_line_number ()); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4491 | array_push ((ARRAY *)bash_lineno_a, t); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4492 | free (t); |
| 4493 | #endif |
| 4494 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4495 | /* The temporary environment for a function is supposed to apply to |
| 4496 | all commands executed within the function body. */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4497 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4498 | remember_args (words->next, 1); |
| 4499 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4500 | /* Update BASH_ARGV and BASH_ARGC */ |
| 4501 | if (debugging_mode) |
| 4502 | push_args (words->next); |
| 4503 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4504 | /* Number of the line on which the function body starts. */ |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4505 | line_number = function_line_number = tc->line; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4506 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4507 | #if defined (JOB_CONTROL) |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4508 | if (subshell) |
| 4509 | stop_pipeline (async, (COMMAND *)NULL); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4510 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4511 | |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4512 | fc = tc; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4513 | |
| 4514 | return_catch_flag++; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4515 | return_val = setjmp_nosigs (return_catch); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4516 | |
| 4517 | if (return_val) |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4518 | { |
| 4519 | result = return_catch_value; |
| 4520 | /* Run the RETURN trap in the function's context. */ |
| 4521 | save_current = currently_executing_command; |
| 4522 | run_return_trap (); |
| 4523 | currently_executing_command = save_current; |
| 4524 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4525 | else |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4526 | { |
| 4527 | /* Run the debug trap here so we can trap at the start of a function's |
| 4528 | execution rather than the execution of the body's first command. */ |
| 4529 | showing_function_line = 1; |
| 4530 | save_current = currently_executing_command; |
| 4531 | result = run_debug_trap (); |
| 4532 | #if defined (DEBUGGER) |
| 4533 | /* In debugging mode, if the DEBUG trap returns a non-zero status, we |
| 4534 | skip the command. */ |
| 4535 | if (debugging_mode == 0 || result == EXECUTION_SUCCESS) |
| 4536 | { |
| 4537 | showing_function_line = 0; |
| 4538 | currently_executing_command = save_current; |
| 4539 | result = execute_command_internal (fc, 0, NO_PIPE, NO_PIPE, fds_to_close); |
| 4540 | |
| 4541 | /* Run the RETURN trap in the function's context */ |
| 4542 | save_current = currently_executing_command; |
| 4543 | run_return_trap (); |
| 4544 | currently_executing_command = save_current; |
| 4545 | } |
| 4546 | #else |
| 4547 | result = execute_command_internal (fc, 0, NO_PIPE, NO_PIPE, fds_to_close); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4548 | |
| 4549 | save_current = currently_executing_command; |
| 4550 | run_return_trap (); |
| 4551 | currently_executing_command = save_current; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4552 | #endif |
| 4553 | showing_function_line = 0; |
| 4554 | } |
| 4555 | |
| 4556 | /* Restore BASH_ARGC and BASH_ARGV */ |
| 4557 | if (debugging_mode) |
| 4558 | pop_args (); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4559 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4560 | if (subshell == 0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4561 | run_unwind_frame ("function_calling"); |
| 4562 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4563 | #if defined (ARRAY_VARS) |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4564 | /* These two variables cannot be unset, and cannot be affected by the |
| 4565 | function. */ |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4566 | array_pop ((ARRAY *)bash_source_a); |
| 4567 | array_pop ((ARRAY *)bash_lineno_a); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 4568 | |
| 4569 | /* FUNCNAME can be unset, and so can potentially be changed by the |
| 4570 | function. */ |
| 4571 | GET_ARRAY_FROM_VAR ("FUNCNAME", nfv, funcname_a); |
| 4572 | if (nfv == funcname_v) |
| 4573 | array_pop (funcname_a); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4574 | #endif |
| 4575 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 4576 | if (variable_context == 0 || this_shell_function == 0) |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4577 | { |
| 4578 | make_funcname_visible (0); |
| 4579 | #if defined (PROCESS_SUBSTITUTION) |
| 4580 | unlink_fifo_list (); |
| 4581 | #endif |
| 4582 | } |
| 4583 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4584 | return (result); |
| 4585 | } |
| 4586 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 4587 | /* A convenience routine for use by other parts of the shell to execute |
| 4588 | a particular shell function. */ |
| 4589 | int |
| 4590 | execute_shell_function (var, words) |
| 4591 | SHELL_VAR *var; |
| 4592 | WORD_LIST *words; |
| 4593 | { |
| 4594 | int ret; |
| 4595 | struct fd_bitmap *bitmap; |
| 4596 | |
| 4597 | bitmap = new_fd_bitmap (FD_BITMAP_DEFAULT_SIZE); |
| 4598 | begin_unwind_frame ("execute-shell-function"); |
| 4599 | add_unwind_protect (dispose_fd_bitmap, (char *)bitmap); |
| 4600 | |
| 4601 | ret = execute_function (var, words, 0, bitmap, 0, 0); |
| 4602 | |
| 4603 | dispose_fd_bitmap (bitmap); |
| 4604 | discard_unwind_frame ("execute-shell-function"); |
| 4605 | |
| 4606 | return ret; |
| 4607 | } |
| 4608 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4609 | /* Execute a shell builtin or function in a subshell environment. This |
| 4610 | routine does not return; it only calls exit(). If BUILTIN is non-null, |
| 4611 | it points to a function to call to execute a shell builtin; otherwise |
| 4612 | VAR points at the body of a function to execute. WORDS is the arguments |
| 4613 | to the command, REDIRECTS specifies redirections to perform before the |
| 4614 | command is executed. */ |
| 4615 | static void |
| 4616 | execute_subshell_builtin_or_function (words, redirects, builtin, var, |
| 4617 | pipe_in, pipe_out, async, fds_to_close, |
| 4618 | flags) |
| 4619 | WORD_LIST *words; |
| 4620 | REDIRECT *redirects; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4621 | sh_builtin_func_t *builtin; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4622 | SHELL_VAR *var; |
| 4623 | int pipe_in, pipe_out, async; |
| 4624 | struct fd_bitmap *fds_to_close; |
| 4625 | int flags; |
| 4626 | { |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 4627 | int result, r, funcvalue; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 4628 | #if defined (JOB_CONTROL) |
| 4629 | int jobs_hack; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4630 | |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 4631 | jobs_hack = (builtin == jobs_builtin) && |
| 4632 | ((subshell_environment & SUBSHELL_ASYNC) == 0 || pipe_out != NO_PIPE); |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 4633 | #endif |
| 4634 | |
| 4635 | /* A subshell is neither a login shell nor interactive. */ |
| 4636 | login_shell = interactive = 0; |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 4637 | |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 4638 | if (async) |
| 4639 | subshell_environment |= SUBSHELL_ASYNC; |
| 4640 | if (pipe_in != NO_PIPE || pipe_out != NO_PIPE) |
| 4641 | subshell_environment |= SUBSHELL_PIPE; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4642 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4643 | maybe_make_export_env (); /* XXX - is this needed? */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4644 | |
| 4645 | #if defined (JOB_CONTROL) |
| 4646 | /* Eradicate all traces of job control after we fork the subshell, so |
| 4647 | all jobs begun by this subshell are in the same process group as |
| 4648 | the shell itself. */ |
| 4649 | |
| 4650 | /* Allow the output of `jobs' to be piped. */ |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 4651 | if (jobs_hack) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4652 | kill_current_pipeline (); |
| 4653 | else |
| 4654 | without_job_control (); |
| 4655 | |
| 4656 | set_sigchld_handler (); |
| 4657 | #endif /* JOB_CONTROL */ |
| 4658 | |
| 4659 | set_sigint_handler (); |
| 4660 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4661 | if (fds_to_close) |
| 4662 | close_fd_bitmap (fds_to_close); |
| 4663 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 4664 | do_piping (pipe_in, pipe_out); |
| 4665 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4666 | if (do_redirections (redirects, RX_ACTIVE) != 0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4667 | exit (EXECUTION_FAILURE); |
| 4668 | |
| 4669 | if (builtin) |
| 4670 | { |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4671 | /* Give builtins a place to jump back to on failure, |
| 4672 | so we don't go back up to main(). */ |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4673 | result = setjmp_nosigs (top_level); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4674 | |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 4675 | /* Give the return builtin a place to jump to when executed in a subshell |
| 4676 | or pipeline */ |
| 4677 | funcvalue = 0; |
| 4678 | if (return_catch_flag && builtin == return_builtin) |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4679 | funcvalue = setjmp_nosigs (return_catch); |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 4680 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4681 | if (result == EXITPROG) |
| 4682 | exit (last_command_exit_value); |
| 4683 | else if (result) |
| 4684 | exit (EXECUTION_FAILURE); |
Jari Aalto | 0628567 | 2006-10-10 14:15:34 +0000 | [diff] [blame] | 4685 | else if (funcvalue) |
| 4686 | exit (return_catch_value); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4687 | else |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4688 | { |
| 4689 | r = execute_builtin (builtin, words, flags, 1); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4690 | fflush (stdout); |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4691 | if (r == EX_USAGE) |
| 4692 | r = EX_BADUSAGE; |
| 4693 | exit (r); |
| 4694 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4695 | } |
| 4696 | else |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4697 | { |
| 4698 | r = execute_function (var, words, flags, fds_to_close, async, 1); |
| 4699 | fflush (stdout); |
| 4700 | exit (r); |
| 4701 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4702 | } |
| 4703 | |
| 4704 | /* Execute a builtin or function in the current shell context. If BUILTIN |
| 4705 | is non-null, it is the builtin command to execute, otherwise VAR points |
| 4706 | to the body of a function. WORDS are the command's arguments, REDIRECTS |
| 4707 | are the redirections to perform. FDS_TO_CLOSE is the usual bitmap of |
| 4708 | file descriptors to close. |
| 4709 | |
| 4710 | If BUILTIN is exec_builtin, the redirections specified in REDIRECTS are |
| 4711 | not undone before this function returns. */ |
| 4712 | static int |
| 4713 | execute_builtin_or_function (words, builtin, var, redirects, |
| 4714 | fds_to_close, flags) |
| 4715 | WORD_LIST *words; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4716 | sh_builtin_func_t *builtin; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4717 | SHELL_VAR *var; |
| 4718 | REDIRECT *redirects; |
| 4719 | struct fd_bitmap *fds_to_close; |
| 4720 | int flags; |
| 4721 | { |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4722 | int result; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4723 | REDIRECT *saved_undo_list; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4724 | #if defined (PROCESS_SUBSTITUTION) |
| 4725 | int ofifo, nfifo, osize; |
| 4726 | char *ofifo_list; |
| 4727 | #endif |
| 4728 | |
| 4729 | |
| 4730 | #if defined (PROCESS_SUBSTITUTION) |
| 4731 | ofifo = num_fifos (); |
| 4732 | ofifo_list = copy_fifo_list (&osize); |
| 4733 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4734 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4735 | if (do_redirections (redirects, RX_ACTIVE|RX_UNDOABLE) != 0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4736 | { |
| 4737 | cleanup_redirects (redirection_undo_list); |
| 4738 | redirection_undo_list = (REDIRECT *)NULL; |
| 4739 | dispose_exec_redirects (); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4740 | #if defined (PROCESS_SUBSTITUTION) |
| 4741 | free (ofifo_list); |
| 4742 | #endif |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4743 | return (EX_REDIRFAIL); /* was EXECUTION_FAILURE */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4744 | } |
| 4745 | |
| 4746 | saved_undo_list = redirection_undo_list; |
| 4747 | |
| 4748 | /* Calling the "exec" builtin changes redirections forever. */ |
| 4749 | if (builtin == exec_builtin) |
| 4750 | { |
| 4751 | dispose_redirects (saved_undo_list); |
| 4752 | saved_undo_list = exec_redirection_undo_list; |
| 4753 | exec_redirection_undo_list = (REDIRECT *)NULL; |
| 4754 | } |
| 4755 | else |
| 4756 | dispose_exec_redirects (); |
| 4757 | |
| 4758 | if (saved_undo_list) |
| 4759 | { |
| 4760 | begin_unwind_frame ("saved redirects"); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4761 | add_unwind_protect (cleanup_redirects, (char *)saved_undo_list); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4762 | } |
| 4763 | |
| 4764 | redirection_undo_list = (REDIRECT *)NULL; |
| 4765 | |
| 4766 | if (builtin) |
| 4767 | result = execute_builtin (builtin, words, flags, 0); |
| 4768 | else |
| 4769 | result = execute_function (var, words, flags, fds_to_close, 0, 0); |
| 4770 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4771 | /* We do this before undoing the effects of any redirections. */ |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4772 | fflush (stdout); |
| 4773 | fpurge (stdout); |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4774 | if (ferror (stdout)) |
| 4775 | clearerr (stdout); |
| 4776 | |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 4777 | /* If we are executing the `command' builtin, but this_shell_builtin is |
| 4778 | set to `exec_builtin', we know that we have something like |
| 4779 | `command exec [redirection]', since otherwise `exec' would have |
| 4780 | overwritten the shell and we wouldn't get here. In this case, we |
| 4781 | want to behave as if the `command' builtin had not been specified |
| 4782 | and preserve the redirections. */ |
| 4783 | if (builtin == command_builtin && this_shell_builtin == exec_builtin) |
| 4784 | { |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4785 | int discard; |
| 4786 | |
| 4787 | discard = 0; |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 4788 | if (saved_undo_list) |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4789 | { |
| 4790 | dispose_redirects (saved_undo_list); |
| 4791 | discard = 1; |
| 4792 | } |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 4793 | redirection_undo_list = exec_redirection_undo_list; |
| 4794 | saved_undo_list = exec_redirection_undo_list = (REDIRECT *)NULL; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4795 | if (discard) |
| 4796 | discard_unwind_frame ("saved redirects"); |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 4797 | } |
| 4798 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4799 | if (saved_undo_list) |
| 4800 | { |
| 4801 | redirection_undo_list = saved_undo_list; |
| 4802 | discard_unwind_frame ("saved redirects"); |
| 4803 | } |
| 4804 | |
| 4805 | if (redirection_undo_list) |
| 4806 | { |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4807 | cleanup_redirects (redirection_undo_list); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4808 | redirection_undo_list = (REDIRECT *)NULL; |
| 4809 | } |
| 4810 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4811 | #if defined (PROCESS_SUBSTITUTION) |
| 4812 | /* Close any FIFOs created by this builtin or function. */ |
| 4813 | nfifo = num_fifos (); |
| 4814 | if (nfifo > ofifo) |
| 4815 | close_new_fifos (ofifo_list, osize); |
| 4816 | free (ofifo_list); |
| 4817 | #endif |
| 4818 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4819 | return (result); |
| 4820 | } |
| 4821 | |
| 4822 | void |
| 4823 | setup_async_signals () |
| 4824 | { |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 4825 | #if defined (__BEOS__) |
| 4826 | set_signal_handler (SIGHUP, SIG_IGN); /* they want csh-like behavior */ |
| 4827 | #endif |
| 4828 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4829 | #if defined (JOB_CONTROL) |
| 4830 | if (job_control == 0) |
| 4831 | #endif |
| 4832 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4833 | /* Make sure we get the original signal dispositions now so we don't |
| 4834 | confuse the trap builtin later if the subshell tries to use it to |
| 4835 | reset SIGINT/SIGQUIT. Don't call set_signal_ignored; that sets |
| 4836 | the value of original_signals to SIG_IGN. Posix interpretation 751. */ |
| 4837 | get_original_signal (SIGINT); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4838 | set_signal_handler (SIGINT, SIG_IGN); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4839 | |
| 4840 | get_original_signal (SIGQUIT); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4841 | set_signal_handler (SIGQUIT, SIG_IGN); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4842 | } |
| 4843 | } |
| 4844 | |
| 4845 | /* Execute a simple command that is hopefully defined in a disk file |
| 4846 | somewhere. |
| 4847 | |
| 4848 | 1) fork () |
| 4849 | 2) connect pipes |
| 4850 | 3) look up the command |
| 4851 | 4) do redirections |
| 4852 | 5) execve () |
| 4853 | 6) If the execve failed, see if the file has executable mode set. |
| 4854 | If so, and it isn't a directory, then execute its contents as |
| 4855 | a shell script. |
| 4856 | |
| 4857 | Note that the filename hashing stuff has to take place up here, |
| 4858 | in the parent. This is probably why the Bourne style shells |
| 4859 | don't handle it, since that would require them to go through |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4860 | this gnarly hair, for no good reason. |
| 4861 | |
| 4862 | NOTE: callers expect this to fork or exit(). */ |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4863 | |
| 4864 | /* Name of a shell function to call when a command name is not found. */ |
| 4865 | #ifndef NOTFOUND_HOOK |
| 4866 | # define NOTFOUND_HOOK "command_not_found_handle" |
| 4867 | #endif |
| 4868 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4869 | static int |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4870 | execute_disk_command (words, redirects, command_line, pipe_in, pipe_out, |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 4871 | async, fds_to_close, cmdflags) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4872 | WORD_LIST *words; |
| 4873 | REDIRECT *redirects; |
| 4874 | char *command_line; |
| 4875 | int pipe_in, pipe_out, async; |
| 4876 | struct fd_bitmap *fds_to_close; |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 4877 | int cmdflags; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4878 | { |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4879 | char *pathname, *command, **args; |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4880 | int nofork, result; |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 4881 | pid_t pid; |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4882 | SHELL_VAR *hookf; |
| 4883 | WORD_LIST *wl; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4884 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 4885 | nofork = (cmdflags & CMD_NO_FORK); /* Don't fork, just exec, if no pipes */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4886 | pathname = words->word->word; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4887 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4888 | result = EXECUTION_SUCCESS; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4889 | #if defined (RESTRICTED_SHELL) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4890 | command = (char *)NULL; |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 4891 | if (restricted && mbschr (pathname, '/')) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4892 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4893 | internal_error (_("%s: restricted: cannot specify `/' in command names"), |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4894 | pathname); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4895 | result = last_command_exit_value = EXECUTION_FAILURE; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4896 | |
| 4897 | /* If we're not going to fork below, we must already be in a child |
| 4898 | process or a context in which it's safe to call exit(2). */ |
| 4899 | if (nofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE) |
| 4900 | exit (last_command_exit_value); |
| 4901 | else |
| 4902 | goto parent_return; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4903 | } |
| 4904 | #endif /* RESTRICTED_SHELL */ |
| 4905 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4906 | command = search_for_command (pathname, 1); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4907 | |
| 4908 | if (command) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4909 | { |
| 4910 | maybe_make_export_env (); |
| 4911 | put_command_name_into_env (command); |
| 4912 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4913 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 4914 | /* We have to make the child before we check for the non-existence |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4915 | of COMMAND, since we want the error messages to be redirected. */ |
| 4916 | /* If we can get away without forking and there are no pipes to deal with, |
| 4917 | don't bother to fork, just directly exec the command. */ |
| 4918 | if (nofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE) |
| 4919 | pid = 0; |
| 4920 | else |
| 4921 | pid = make_child (savestring (command_line), async); |
| 4922 | |
| 4923 | if (pid == 0) |
| 4924 | { |
| 4925 | int old_interactive; |
| 4926 | |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4927 | reset_terminating_signals (); /* XXX */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4928 | /* Cancel traps, in trap.c. */ |
| 4929 | restore_original_signals (); |
| 4930 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4931 | CHECK_SIGTERM; |
| 4932 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4933 | /* restore_original_signals may have undone the work done |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 4934 | by make_child to ensure that SIGINT and SIGQUIT are ignored |
| 4935 | in asynchronous children. */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4936 | if (async) |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 4937 | { |
| 4938 | if ((cmdflags & CMD_STDIN_REDIR) && |
| 4939 | pipe_in == NO_PIPE && |
| 4940 | (stdin_redirects (redirects) == 0)) |
| 4941 | async_redirect_stdin (); |
| 4942 | setup_async_signals (); |
| 4943 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4944 | |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 4945 | /* This functionality is now provided by close-on-exec of the |
| 4946 | file descriptors manipulated by redirection and piping. |
| 4947 | Some file descriptors still need to be closed in all children |
| 4948 | because of the way bash does pipes; fds_to_close is a |
| 4949 | bitmap of all such file descriptors. */ |
| 4950 | if (fds_to_close) |
| 4951 | close_fd_bitmap (fds_to_close); |
| 4952 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4953 | do_piping (pipe_in, pipe_out); |
| 4954 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4955 | old_interactive = interactive; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4956 | if (async) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 4957 | interactive = 0; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4958 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4959 | subshell_environment = SUBSHELL_FORK; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4960 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 4961 | if (redirects && (do_redirections (redirects, RX_ACTIVE) != 0)) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4962 | { |
| 4963 | #if defined (PROCESS_SUBSTITUTION) |
| 4964 | /* Try to remove named pipes that may have been created as the |
| 4965 | result of redirections. */ |
| 4966 | unlink_fifo_list (); |
| 4967 | #endif /* PROCESS_SUBSTITUTION */ |
| 4968 | exit (EXECUTION_FAILURE); |
| 4969 | } |
| 4970 | |
| 4971 | if (async) |
| 4972 | interactive = old_interactive; |
| 4973 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4974 | if (command == 0) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4975 | { |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4976 | hookf = find_function (NOTFOUND_HOOK); |
| 4977 | if (hookf == 0) |
| 4978 | { |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 4979 | /* Make sure filenames are displayed using printable characters */ |
| 4980 | if (ansic_shouldquote (pathname)) |
| 4981 | pathname = ansic_quote (pathname, 0, NULL); |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4982 | internal_error (_("%s: command not found"), pathname); |
| 4983 | exit (EX_NOTFOUND); /* Posix.2 says the exit status is 127 */ |
| 4984 | } |
| 4985 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4986 | #if defined (JOB_CONTROL) |
| 4987 | /* May need to reinitialize more of the job control state here. */ |
| 4988 | kill_current_pipeline (); |
| 4989 | #endif |
| 4990 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 4991 | wl = make_word_list (make_word (NOTFOUND_HOOK), words); |
| 4992 | exit (execute_shell_function (hookf, wl)); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 4993 | } |
| 4994 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 4995 | CHECK_SIGTERM; |
| 4996 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4997 | /* Execve expects the command name to be in args[0]. So we |
| 4998 | leave it there, in the same format that the user used to |
| 4999 | type it in. */ |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 5000 | args = strvec_from_word_list (words, 0, 0, (int *)NULL); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5001 | exit (shell_execve (command, args, export_env)); |
| 5002 | } |
| 5003 | else |
| 5004 | { |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 5005 | parent_return: |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 5006 | QUIT; |
| 5007 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5008 | /* Make sure that the pipes are closed in the parent. */ |
| 5009 | close_pipes (pipe_in, pipe_out); |
| 5010 | #if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD) |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 5011 | if (variable_context == 0) |
| 5012 | unlink_fifo_list (); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5013 | #endif |
| 5014 | FREE (command); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 5015 | return (result); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5016 | } |
| 5017 | } |
| 5018 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 5019 | /* CPP defines to decide whether a particular index into the #! line |
| 5020 | corresponds to a valid interpreter name or argument character, or |
| 5021 | whitespace. The MSDOS define is to allow \r to be treated the same |
| 5022 | as \n. */ |
| 5023 | |
| 5024 | #if !defined (MSDOS) |
| 5025 | # define STRINGCHAR(ind) \ |
| 5026 | (ind < sample_len && !whitespace (sample[ind]) && sample[ind] != '\n') |
| 5027 | # define WHITECHAR(ind) \ |
| 5028 | (ind < sample_len && whitespace (sample[ind])) |
| 5029 | #else /* MSDOS */ |
| 5030 | # define STRINGCHAR(ind) \ |
| 5031 | (ind < sample_len && !whitespace (sample[ind]) && sample[ind] != '\n' && sample[ind] != '\r') |
| 5032 | # define WHITECHAR(ind) \ |
| 5033 | (ind < sample_len && whitespace (sample[ind])) |
| 5034 | #endif /* MSDOS */ |
| 5035 | |
| 5036 | static char * |
| 5037 | getinterp (sample, sample_len, endp) |
| 5038 | char *sample; |
| 5039 | int sample_len, *endp; |
| 5040 | { |
| 5041 | register int i; |
| 5042 | char *execname; |
| 5043 | int start; |
| 5044 | |
| 5045 | /* Find the name of the interpreter to exec. */ |
| 5046 | for (i = 2; i < sample_len && whitespace (sample[i]); i++) |
| 5047 | ; |
| 5048 | |
| 5049 | for (start = i; STRINGCHAR(i); i++) |
| 5050 | ; |
| 5051 | |
| 5052 | execname = substring (sample, start, i); |
| 5053 | |
| 5054 | if (endp) |
| 5055 | *endp = i; |
| 5056 | return execname; |
| 5057 | } |
| 5058 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5059 | #if !defined (HAVE_HASH_BANG_EXEC) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5060 | /* If the operating system on which we're running does not handle |
| 5061 | the #! executable format, then help out. SAMPLE is the text read |
| 5062 | from the file, SAMPLE_LEN characters. COMMAND is the name of |
| 5063 | the script; it and ARGS, the arguments given by the user, will |
| 5064 | become arguments to the specified interpreter. ENV is the environment |
| 5065 | to pass to the interpreter. |
| 5066 | |
| 5067 | The word immediately following the #! is the interpreter to execute. |
| 5068 | A single argument to the interpreter is allowed. */ |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5069 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5070 | static int |
| 5071 | execute_shell_script (sample, sample_len, command, args, env) |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 5072 | char *sample; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5073 | int sample_len; |
| 5074 | char *command; |
| 5075 | char **args, **env; |
| 5076 | { |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5077 | char *execname, *firstarg; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 5078 | int i, start, size_increment, larry; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5079 | |
| 5080 | /* Find the name of the interpreter to exec. */ |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 5081 | execname = getinterp (sample, sample_len, &i); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5082 | size_increment = 1; |
| 5083 | |
| 5084 | /* Now the argument, if any. */ |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5085 | for (firstarg = (char *)NULL, start = i; WHITECHAR(i); i++) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5086 | ; |
| 5087 | |
| 5088 | /* If there is more text on the line, then it is an argument for the |
| 5089 | interpreter. */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5090 | |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5091 | if (STRINGCHAR(i)) |
| 5092 | { |
| 5093 | for (start = i; STRINGCHAR(i); i++) |
| 5094 | ; |
| 5095 | firstarg = substring ((char *)sample, start, i); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5096 | size_increment = 2; |
| 5097 | } |
| 5098 | |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 5099 | larry = strvec_len (args) + size_increment; |
| 5100 | args = strvec_resize (args, larry + 1); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5101 | |
| 5102 | for (i = larry - 1; i; i--) |
| 5103 | args[i] = args[i - size_increment]; |
| 5104 | |
| 5105 | args[0] = execname; |
| 5106 | if (firstarg) |
| 5107 | { |
| 5108 | args[1] = firstarg; |
| 5109 | args[2] = command; |
| 5110 | } |
| 5111 | else |
| 5112 | args[1] = command; |
| 5113 | |
| 5114 | args[larry] = (char *)NULL; |
| 5115 | |
| 5116 | return (shell_execve (execname, args, env)); |
| 5117 | } |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5118 | #undef STRINGCHAR |
| 5119 | #undef WHITECHAR |
| 5120 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5121 | #endif /* !HAVE_HASH_BANG_EXEC */ |
| 5122 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 5123 | static void |
| 5124 | initialize_subshell () |
| 5125 | { |
| 5126 | #if defined (ALIAS) |
| 5127 | /* Forget about any aliases that we knew of. We are in a subshell. */ |
| 5128 | delete_all_aliases (); |
| 5129 | #endif /* ALIAS */ |
| 5130 | |
| 5131 | #if defined (HISTORY) |
| 5132 | /* Forget about the history lines we have read. This is a non-interactive |
| 5133 | subshell. */ |
| 5134 | history_lines_this_session = 0; |
| 5135 | #endif |
| 5136 | |
| 5137 | #if defined (JOB_CONTROL) |
| 5138 | /* Forget about the way job control was working. We are in a subshell. */ |
| 5139 | without_job_control (); |
| 5140 | set_sigchld_handler (); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 5141 | init_job_stats (); |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 5142 | #endif /* JOB_CONTROL */ |
| 5143 | |
| 5144 | /* Reset the values of the shell flags and options. */ |
| 5145 | reset_shell_flags (); |
| 5146 | reset_shell_options (); |
| 5147 | reset_shopt_options (); |
| 5148 | |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5149 | /* Zero out builtin_env, since this could be a shell script run from a |
| 5150 | sourced file with a temporary environment supplied to the `source/.' |
| 5151 | builtin. Such variables are not supposed to be exported (empirical |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 5152 | testing with sh and ksh). Just throw it away; don't worry about a |
| 5153 | memory leak. */ |
| 5154 | if (vc_isbltnenv (shell_variables)) |
| 5155 | shell_variables = shell_variables->down; |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5156 | |
| 5157 | clear_unwind_protect_list (0); |
Jari Aalto | f1be666 | 2008-11-18 13:15:12 +0000 | [diff] [blame] | 5158 | /* XXX -- are there other things we should be resetting here? */ |
| 5159 | parse_and_execute_level = 0; /* nothing left to restore it */ |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5160 | |
| 5161 | /* We're no longer inside a shell function. */ |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 5162 | variable_context = return_catch_flag = funcnest = 0; |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5163 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 5164 | executing_list = 0; /* XXX */ |
| 5165 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 5166 | /* If we're not interactive, close the file descriptor from which we're |
| 5167 | reading the current shell script. */ |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 5168 | if (interactive_shell == 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 5169 | unset_bash_input (0); |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 5170 | } |
| 5171 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5172 | #if defined (HAVE_SETOSTYPE) && defined (_POSIX_SOURCE) |
| 5173 | # define SETOSTYPE(x) __setostype(x) |
| 5174 | #else |
| 5175 | # define SETOSTYPE(x) |
| 5176 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5177 | |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5178 | #define READ_SAMPLE_BUF(file, buf, len) \ |
| 5179 | do \ |
| 5180 | { \ |
| 5181 | fd = open(file, O_RDONLY); \ |
| 5182 | if (fd >= 0) \ |
| 5183 | { \ |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 5184 | len = read (fd, buf, 80); \ |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5185 | close (fd); \ |
| 5186 | } \ |
| 5187 | else \ |
| 5188 | len = -1; \ |
| 5189 | } \ |
| 5190 | while (0) |
| 5191 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5192 | /* Call execve (), handling interpreting shell scripts, and handling |
| 5193 | exec failures. */ |
| 5194 | int |
| 5195 | shell_execve (command, args, env) |
| 5196 | char *command; |
| 5197 | char **args, **env; |
| 5198 | { |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5199 | int larray, i, fd; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 5200 | char sample[80]; |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5201 | int sample_len; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5202 | |
| 5203 | SETOSTYPE (0); /* Some systems use for USG/POSIX semantics */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5204 | execve (command, args, env); |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5205 | i = errno; /* error from execve() */ |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 5206 | CHECK_TERMSIG; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5207 | SETOSTYPE (1); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5208 | |
| 5209 | /* If we get to this point, then start checking out the file. |
| 5210 | Maybe it is something we can hack ourselves. */ |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5211 | if (i != ENOEXEC) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5212 | { |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 5213 | if (file_isdir (command)) |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 5214 | #if defined (EISDIR) |
| 5215 | internal_error (_("%s: %s"), command, strerror (EISDIR)); |
| 5216 | #else |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 5217 | internal_error (_("%s: is a directory"), command); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 5218 | #endif |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 5219 | else if (executable_file (command) == 0) |
| 5220 | { |
| 5221 | errno = i; |
| 5222 | file_error (command); |
| 5223 | } |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 5224 | /* errors not involving the path argument to execve. */ |
| 5225 | else if (i == E2BIG || i == ENOMEM) |
| 5226 | { |
| 5227 | errno = i; |
| 5228 | file_error (command); |
| 5229 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5230 | else |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5231 | { |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 5232 | /* The file has the execute bits set, but the kernel refuses to |
| 5233 | run it for some reason. See why. */ |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5234 | #if defined (HAVE_HASH_BANG_EXEC) |
| 5235 | READ_SAMPLE_BUF (command, sample, sample_len); |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 5236 | sample[sample_len - 1] = '\0'; |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5237 | if (sample_len > 2 && sample[0] == '#' && sample[1] == '!') |
| 5238 | { |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 5239 | char *interp; |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 5240 | int ilen; |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 5241 | |
| 5242 | interp = getinterp (sample, sample_len, (int *)NULL); |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 5243 | ilen = strlen (interp); |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5244 | errno = i; |
Jari Aalto | 95732b4 | 2005-12-07 14:08:12 +0000 | [diff] [blame] | 5245 | if (interp[ilen - 1] == '\r') |
| 5246 | { |
| 5247 | interp = xrealloc (interp, ilen + 2); |
| 5248 | interp[ilen - 1] = '^'; |
| 5249 | interp[ilen] = 'M'; |
| 5250 | interp[ilen + 1] = '\0'; |
| 5251 | } |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 5252 | sys_error (_("%s: %s: bad interpreter"), command, interp ? interp : ""); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 5253 | FREE (interp); |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5254 | return (EX_NOEXEC); |
| 5255 | } |
| 5256 | #endif |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5257 | errno = i; |
| 5258 | file_error (command); |
| 5259 | } |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 5260 | return ((i == ENOENT) ? EX_NOTFOUND : EX_NOEXEC); /* XXX Posix.2 says that exit status is 126 */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5261 | } |
| 5262 | |
| 5263 | /* This file is executable. |
| 5264 | If it begins with #!, then help out people with losing operating |
| 5265 | systems. Otherwise, check to see if it is a binary file by seeing |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5266 | if the contents of the first line (or up to 80 characters) are in the |
| 5267 | ASCII set. If it's a text file, execute the contents as shell commands, |
| 5268 | otherwise return 126 (EX_BINARY_FILE). */ |
| 5269 | READ_SAMPLE_BUF (command, sample, sample_len); |
| 5270 | |
| 5271 | if (sample_len == 0) |
| 5272 | return (EXECUTION_SUCCESS); |
| 5273 | |
| 5274 | /* Is this supposed to be an executable script? |
| 5275 | If so, the format of the line is "#! interpreter [argument]". |
| 5276 | A single argument is allowed. The BSD kernel restricts |
| 5277 | the length of the entire line to 32 characters (32 bytes |
| 5278 | being the size of the BSD exec header), but we allow 80 |
| 5279 | characters. */ |
| 5280 | if (sample_len > 0) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5281 | { |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5282 | #if !defined (HAVE_HASH_BANG_EXEC) |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5283 | if (sample_len > 2 && sample[0] == '#' && sample[1] == '!') |
| 5284 | return (execute_shell_script (sample, sample_len, command, args, env)); |
| 5285 | else |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5286 | #endif |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5287 | if (check_binary_file (sample, sample_len)) |
| 5288 | { |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 5289 | internal_error (_("%s: cannot execute binary file: %s"), command, strerror (i)); |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5290 | return (EX_BINARY_FILE); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5291 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5292 | } |
| 5293 | |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5294 | /* We have committed to attempting to execute the contents of this file |
| 5295 | as shell commands. */ |
| 5296 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 5297 | initialize_subshell (); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5298 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5299 | set_sigint_handler (); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5300 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5301 | /* Insert the name of this shell into the argument list. */ |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 5302 | larray = strvec_len (args) + 1; |
| 5303 | args = strvec_resize (args, larray + 1); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5304 | |
| 5305 | for (i = larray - 1; i; i--) |
| 5306 | args[i] = args[i - 1]; |
| 5307 | |
| 5308 | args[0] = shell_name; |
| 5309 | args[1] = command; |
| 5310 | args[larray] = (char *)NULL; |
| 5311 | |
| 5312 | if (args[0][0] == '-') |
| 5313 | args[0]++; |
| 5314 | |
| 5315 | #if defined (RESTRICTED_SHELL) |
| 5316 | if (restricted) |
| 5317 | change_flag ('r', FLAG_OFF); |
| 5318 | #endif |
| 5319 | |
| 5320 | if (subshell_argv) |
| 5321 | { |
| 5322 | /* Can't free subshell_argv[0]; that is shell_name. */ |
| 5323 | for (i = 1; i < subshell_argc; i++) |
| 5324 | free (subshell_argv[i]); |
| 5325 | free (subshell_argv); |
| 5326 | } |
| 5327 | |
| 5328 | dispose_command (currently_executing_command); /* XXX */ |
| 5329 | currently_executing_command = (COMMAND *)NULL; |
| 5330 | |
| 5331 | subshell_argc = larray; |
| 5332 | subshell_argv = args; |
| 5333 | subshell_envp = env; |
| 5334 | |
| 5335 | unbind_args (); /* remove the positional parameters */ |
| 5336 | |
| 5337 | longjmp (subshell_top_level, 1); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 5338 | /*NOTREACHED*/ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5339 | } |
| 5340 | |
| 5341 | static int |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 5342 | execute_intern_function (name, funcdef) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5343 | WORD_DESC *name; |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 5344 | FUNCTION_DEF *funcdef; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5345 | { |
| 5346 | SHELL_VAR *var; |
| 5347 | |
| 5348 | if (check_identifier (name, posixly_correct) == 0) |
| 5349 | { |
| 5350 | if (posixly_correct && interactive_shell == 0) |
| 5351 | { |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 5352 | last_command_exit_value = EX_BADUSAGE; |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 5353 | jump_to_top_level (ERREXIT); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5354 | } |
| 5355 | return (EXECUTION_FAILURE); |
| 5356 | } |
| 5357 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 5358 | /* Posix interpretation 383 */ |
| 5359 | if (posixly_correct && find_special_builtin (name->word)) |
| 5360 | { |
| 5361 | internal_error (_("`%s': is a special builtin"), name->word); |
| 5362 | last_command_exit_value = EX_BADUSAGE; |
| 5363 | jump_to_top_level (ERREXIT); |
| 5364 | } |
| 5365 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5366 | var = find_function (name->word); |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5367 | if (var && (readonly_p (var) || noassign_p (var))) |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5368 | { |
Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 5369 | if (readonly_p (var)) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 5370 | internal_error (_("%s: readonly function"), var->name); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5371 | return (EXECUTION_FAILURE); |
| 5372 | } |
| 5373 | |
Chet Ramey | ac50fba | 2014-02-26 09:36:43 -0500 | [diff] [blame] | 5374 | #if defined (DEBUGGER) |
| 5375 | bind_function_def (name->word, funcdef); |
| 5376 | #endif |
| 5377 | |
| 5378 | bind_function (name->word, funcdef->command); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5379 | return (EXECUTION_SUCCESS); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5380 | } |
| 5381 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 5382 | #if defined (INCLUDE_UNUSED) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5383 | #if defined (PROCESS_SUBSTITUTION) |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5384 | void |
| 5385 | close_all_files () |
| 5386 | { |
| 5387 | register int i, fd_table_size; |
| 5388 | |
| 5389 | fd_table_size = getdtablesize (); |
| 5390 | if (fd_table_size > 256) /* clamp to a reasonable value */ |
Jari Aalto | 7117c2d | 2002-07-17 14:10:11 +0000 | [diff] [blame] | 5391 | fd_table_size = 256; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5392 | |
| 5393 | for (i = 3; i < fd_table_size; i++) |
| 5394 | close (i); |
| 5395 | } |
| 5396 | #endif /* PROCESS_SUBSTITUTION */ |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 5397 | #endif |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5398 | |
| 5399 | static void |
| 5400 | close_pipes (in, out) |
| 5401 | int in, out; |
| 5402 | { |
| 5403 | if (in >= 0) |
| 5404 | close (in); |
| 5405 | if (out >= 0) |
| 5406 | close (out); |
| 5407 | } |
| 5408 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 5409 | static void |
| 5410 | dup_error (oldd, newd) |
| 5411 | int oldd, newd; |
| 5412 | { |
| 5413 | sys_error (_("cannot duplicate fd %d to fd %d"), oldd, newd); |
| 5414 | } |
| 5415 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5416 | /* Redirect input and output to be from and to the specified pipes. |
| 5417 | NO_PIPE and REDIRECT_BOTH are handled correctly. */ |
| 5418 | static void |
| 5419 | do_piping (pipe_in, pipe_out) |
| 5420 | int pipe_in, pipe_out; |
| 5421 | { |
| 5422 | if (pipe_in != NO_PIPE) |
| 5423 | { |
| 5424 | if (dup2 (pipe_in, 0) < 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 5425 | dup_error (pipe_in, 0); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5426 | if (pipe_in > 0) |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 5427 | close (pipe_in); |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 5428 | #ifdef __CYGWIN__ |
| 5429 | /* Let stdio know the fd may have changed from text to binary mode. */ |
| 5430 | freopen (NULL, "r", stdin); |
| 5431 | #endif /* __CYGWIN__ */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5432 | } |
| 5433 | if (pipe_out != NO_PIPE) |
| 5434 | { |
| 5435 | if (pipe_out != REDIRECT_BOTH) |
| 5436 | { |
| 5437 | if (dup2 (pipe_out, 1) < 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 5438 | dup_error (pipe_out, 1); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5439 | if (pipe_out == 0 || pipe_out > 1) |
| 5440 | close (pipe_out); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5441 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 5442 | else |
| 5443 | { |
Jari Aalto | cce855b | 1998-04-17 19:52:44 +0000 | [diff] [blame] | 5444 | if (dup2 (1, 2) < 0) |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 5445 | dup_error (1, 2); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5446 | } |
Chet Ramey | 495aee4 | 2011-11-22 19:11:26 -0500 | [diff] [blame] | 5447 | #ifdef __CYGWIN__ |
| 5448 | /* Let stdio know the fd may have changed from text to binary mode, and |
| 5449 | make sure to preserve stdout line buffering. */ |
| 5450 | freopen (NULL, "w", stdout); |
| 5451 | sh_setlinebuf (stdout); |
| 5452 | #endif /* __CYGWIN__ */ |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5453 | } |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 5454 | } |