mirror of https://github.com/n-hys/bash.git
124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/* trap.h -- data structures used in the trap mechanism. */
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/* Copyright (C) 1993-2013 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined (_TRAP_H_)
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#define _TRAP_H_
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#include "stdc.h"
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#if !defined (SIG_DFL)
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#include "bashtypes.h"
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#include <signal.h>
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#endif /* SIG_DFL */
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#if !defined (NSIG)
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#define NSIG 64
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#endif /* !NSIG */
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#define NO_SIG -1
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#define DEFAULT_SIG SIG_DFL
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#define IGNORE_SIG SIG_IGN
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/* Special shell trap names. */
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#define DEBUG_TRAP NSIG
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#define ERROR_TRAP NSIG+1
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#define RETURN_TRAP NSIG+2
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#define EXIT_TRAP 0
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/* system signals plus special bash traps */
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#define BASH_NSIG NSIG+3
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/* Flags values for decode_signal() */
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#define DSIG_SIGPREFIX 0x01 /* don't allow `SIG' PREFIX */
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#define DSIG_NOCASE 0x02 /* case-insensitive comparison */
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/* A value which can never be the target of a trap handler. */
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#define IMPOSSIBLE_TRAP_HANDLER (SigHandler *)initialize_traps
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#define signal_object_p(x,f) (decode_signal (x,f) != NO_SIG)
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#define TRAP_STRING(s) \
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(signal_is_trapped (s) && signal_is_ignored (s) == 0) ? trap_list[s] \
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: (char *)NULL
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extern char *trap_list[];
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extern int trapped_signal_received;
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extern int wait_signal_received;
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extern int running_trap;
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extern int trap_saved_exit_value;
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/* Externally-visible functions declared in trap.c. */
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extern void initialize_traps __P((void));
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extern void run_pending_traps __P((void));
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extern void queue_sigchld_trap __P((int));
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extern void maybe_set_sigchld_trap __P((char *));
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extern void set_impossible_sigchld_trap __P((void));
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extern void set_sigchld_trap __P((char *));
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extern void set_debug_trap __P((char *));
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extern void set_error_trap __P((char *));
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extern void set_return_trap __P((char *));
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extern void maybe_set_debug_trap __P((char *));
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extern void maybe_set_error_trap __P((char *));
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extern void maybe_set_return_trap __P((char *));
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extern void set_sigint_trap __P((char *));
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extern void set_signal __P((int, char *));
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extern void restore_default_signal __P((int));
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extern void ignore_signal __P((int));
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extern int run_exit_trap __P((void));
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extern void run_trap_cleanup __P((int));
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extern int run_debug_trap __P((void));
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extern void run_error_trap __P((void));
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extern void run_return_trap __P((void));
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extern void free_trap_strings __P((void));
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extern void reset_signal_handlers __P((void));
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extern void restore_original_signals __P((void));
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extern void get_original_signal __P((int));
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extern void get_all_original_signals __P((void));
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extern char *signal_name __P((int));
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extern int decode_signal __P((char *, int));
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extern void run_interrupt_trap __P((int));
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extern int maybe_call_trap_handler __P((int));
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extern int signal_is_special __P((int));
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extern int signal_is_trapped __P((int));
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extern int signal_is_pending __P((int));
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extern int signal_is_ignored __P((int));
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extern int signal_is_hard_ignored __P((int));
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extern void set_signal_hard_ignored __P((int));
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extern void set_signal_ignored __P((int));
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extern int signal_in_progress __P((int));
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extern int first_pending_trap __P((void));
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extern int any_signals_trapped __P((void));
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extern void check_signals __P((void));
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extern void check_signals_and_traps __P((void));
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#endif /* _TRAP_H_ */
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