| 1 | /* trap.h -- data structures used in the trap mechanism. */
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| 2 |
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| 3 | /* Copyright (C) 1993 Free Software Foundation, Inc.
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| 4 |
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| 5 | This file is part of GNU Bash, the Bourne Again SHell.
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| 6 |
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| 7 | Bash is free software; you can redistribute it and/or modify it under
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| 8 | the terms of the GNU General Public License as published by the Free
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| 9 | Software Foundation; either version 2, or (at your option) any later
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| 10 | version.
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| 11 |
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| 12 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY
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| 13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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| 15 | for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License along
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| 18 | with Bash; see the file COPYING. If not, write to the Free Software
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| 19 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
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| 20 |
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| 21 | #if !defined (_TRAP_H_)
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| 22 | #define _TRAP_H_
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| 23 |
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| 24 | #include "stdc.h"
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| 25 |
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| 26 | #if !defined (SIG_DFL)
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| 27 | #include "bashtypes.h"
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| 28 | #include <signal.h>
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| 29 | #endif /* SIG_DFL */
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| 30 |
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| 31 | #if !defined (NSIG)
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| 32 | #define NSIG 64
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| 33 | #endif /* !NSIG */
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| 34 |
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| 35 | #define NO_SIG -1
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| 36 | #define DEFAULT_SIG SIG_DFL
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| 37 | #define IGNORE_SIG SIG_IGN
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| 38 |
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| 39 | /* Special shell trap names. */
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| 40 | #define DEBUG_TRAP NSIG
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| 41 | #define ERROR_TRAP NSIG+1
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| 42 | #define RETURN_TRAP NSIG+2
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| 43 | #define EXIT_TRAP 0
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| 44 |
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| 45 | /* system signals plus special bash traps */
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| 46 | #define BASH_NSIG NSIG+3
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| 47 |
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| 48 | /* Flags values for decode_signal() */
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| 49 | #define DSIG_SIGPREFIX 0x01 /* don't alllow `SIG' PREFIX */
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| 50 | #define DSIG_NOCASE 0x02 /* case-insensitive comparison */
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| 51 |
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| 52 | #define signal_object_p(x,f) (decode_signal (x,f) != NO_SIG)
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| 53 |
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| 54 | #define TRAP_STRING(s) \
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| 55 | (signal_is_trapped (s) && signal_is_ignored (s) == 0) ? trap_list[s] \
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| 56 | : (char *)NULL
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| 57 |
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| 58 | extern char *trap_list[];
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| 59 |
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| 60 | /* Externally-visible functions declared in trap.c. */
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| 61 | extern void initialize_traps __P((void));
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| 62 |
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| 63 | extern void run_pending_traps __P((void));
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| 64 |
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| 65 | extern void maybe_set_sigchld_trap __P((char *));
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| 66 | extern void set_sigchld_trap __P((char *));
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| 67 |
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| 68 | extern void set_debug_trap __P((char *));
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| 69 | extern void set_error_trap __P((char *));
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| 70 | extern void set_return_trap __P((char *));
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| 71 |
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| 72 | extern void set_sigint_trap __P((char *));
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| 73 | extern void set_signal __P((int, char *));
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| 74 |
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| 75 | extern void restore_default_signal __P((int));
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| 76 | extern void ignore_signal __P((int));
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| 77 | extern int run_exit_trap __P((void));
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| 78 | extern void run_trap_cleanup __P((int));
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| 79 | extern int run_debug_trap __P((void));
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| 80 | extern void run_error_trap __P((void));
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| 81 | extern void run_return_trap __P((void));
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| 82 |
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| 83 | extern void free_trap_strings __P((void));
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| 84 | extern void reset_signal_handlers __P((void));
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| 85 | extern void restore_original_signals __P((void));
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| 86 |
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| 87 | extern char *signal_name __P((int));
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| 88 |
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| 89 | extern int decode_signal __P((char *, int));
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| 90 | extern void run_interrupt_trap __P((void));
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| 91 | extern int maybe_call_trap_handler __P((int));
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| 92 | extern int signal_is_trapped __P((int));
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| 93 | extern int signal_is_ignored __P((int));
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| 94 | extern int signal_is_special __P((int));
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| 95 | extern void set_signal_ignored __P((int));
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| 96 | extern int signal_in_progress __P((int));
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| 97 |
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| 98 | #endif /* _TRAP_H_ */
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