| /* trap.h -- data structures used in the trap mechanism. */ |
| |
| /* Copyright (C) 1993-2010 Free Software Foundation, Inc. |
| |
| This file is part of GNU Bash, the Bourne Again SHell. |
| |
| Bash is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation, either version 3 of the License, or |
| (at your option) any later version. |
| |
| Bash is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with Bash. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #if !defined (_TRAP_H_) |
| #define _TRAP_H_ |
| |
| #include "stdc.h" |
| |
| #if !defined (SIG_DFL) |
| #include "bashtypes.h" |
| #include <signal.h> |
| #endif /* SIG_DFL */ |
| |
| #if !defined (NSIG) |
| #define NSIG 64 |
| #endif /* !NSIG */ |
| |
| #define NO_SIG -1 |
| #define DEFAULT_SIG SIG_DFL |
| #define IGNORE_SIG SIG_IGN |
| |
| /* Special shell trap names. */ |
| #define DEBUG_TRAP NSIG |
| #define ERROR_TRAP NSIG+1 |
| #define RETURN_TRAP NSIG+2 |
| #define EXIT_TRAP 0 |
| |
| /* system signals plus special bash traps */ |
| #define BASH_NSIG NSIG+3 |
| |
| /* Flags values for decode_signal() */ |
| #define DSIG_SIGPREFIX 0x01 /* don't alllow `SIG' PREFIX */ |
| #define DSIG_NOCASE 0x02 /* case-insensitive comparison */ |
| |
| /* A value which can never be the target of a trap handler. */ |
| #define IMPOSSIBLE_TRAP_HANDLER (SigHandler *)initialize_traps |
| |
| #define signal_object_p(x,f) (decode_signal (x,f) != NO_SIG) |
| |
| #define TRAP_STRING(s) \ |
| (signal_is_trapped (s) && signal_is_ignored (s) == 0) ? trap_list[s] \ |
| : (char *)NULL |
| |
| extern char *trap_list[]; |
| |
| /* Externally-visible functions declared in trap.c. */ |
| extern void initialize_traps __P((void)); |
| |
| extern void run_pending_traps __P((void)); |
| |
| extern void maybe_set_sigchld_trap __P((char *)); |
| extern void set_impossible_sigchld_trap __P((void)); |
| extern void set_sigchld_trap __P((char *)); |
| |
| extern void set_debug_trap __P((char *)); |
| extern void set_error_trap __P((char *)); |
| extern void set_return_trap __P((char *)); |
| |
| extern void set_sigint_trap __P((char *)); |
| extern void set_signal __P((int, char *)); |
| |
| extern void restore_default_signal __P((int)); |
| extern void ignore_signal __P((int)); |
| extern int run_exit_trap __P((void)); |
| extern void run_trap_cleanup __P((int)); |
| extern int run_debug_trap __P((void)); |
| extern void run_error_trap __P((void)); |
| extern void run_return_trap __P((void)); |
| |
| extern void free_trap_strings __P((void)); |
| extern void reset_signal_handlers __P((void)); |
| extern void restore_original_signals __P((void)); |
| |
| extern void get_all_original_signals __P((void)); |
| |
| extern char *signal_name __P((int)); |
| |
| extern int decode_signal __P((char *, int)); |
| extern void run_interrupt_trap __P((void)); |
| extern int maybe_call_trap_handler __P((int)); |
| extern int signal_is_special __P((int)); |
| extern int signal_is_trapped __P((int)); |
| extern int signal_is_ignored __P((int)); |
| extern int signal_is_hard_ignored __P((int)); |
| extern void set_signal_ignored __P((int)); |
| extern int signal_in_progress __P((int)); |
| |
| #endif /* _TRAP_H_ */ |