1/* trap.h -- data structures used in the trap mechanism. */ 2 3/* Copyright (C) 1993 Free Software Foundation, Inc. 4 5 This file is part of GNU Bash, the Bourne Again SHell. 6 7 Bash is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 2, or (at your option) any later 10 version. 11 12 Bash is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 You should have received a copy of the GNU General Public License along 18 with Bash; see the file COPYING. If not, write to the Free Software 19 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ 20 21#if !defined (_TRAP_H_) 22#define _TRAP_H_ 23 24#include "stdc.h" 25 26#if !defined (SIG_DFL) 27#include "bashtypes.h" 28#include <signal.h> 29#endif /* SIG_DFL */ 30 31#if !defined (NSIG) 32#define NSIG 64 33#endif /* !NSIG */ 34 35#define NO_SIG -1 36#define DEFAULT_SIG SIG_DFL 37#define IGNORE_SIG SIG_IGN 38 39/* Special shell trap names. */ 40#define DEBUG_TRAP NSIG 41#define ERROR_TRAP NSIG+1 42#define RETURN_TRAP NSIG+2 43#define EXIT_TRAP 0 44 45/* system signals plus special bash traps */ 46#define BASH_NSIG NSIG+3 47 48/* Flags values for decode_signal() */ 49#define DSIG_SIGPREFIX 0x01 /* don't alllow `SIG' PREFIX */ 50#define DSIG_NOCASE 0x02 /* case-insensitive comparison */ 51 52#define signal_object_p(x,f) (decode_signal (x,f) != NO_SIG) 53 54#define TRAP_STRING(s) \ 55 (signal_is_trapped (s) && signal_is_ignored (s) == 0) ? trap_list[s] \ 56 : (char *)NULL 57 58extern char *trap_list[]; 59 60/* Externally-visible functions declared in trap.c. */ 61extern void initialize_traps __P((void)); 62 63extern void run_pending_traps __P((void)); 64 65extern void maybe_set_sigchld_trap __P((char *)); 66extern void set_sigchld_trap __P((char *)); 67 68extern void set_debug_trap __P((char *)); 69extern void set_error_trap __P((char *)); 70extern void set_return_trap __P((char *)); 71 72extern void set_sigint_trap __P((char *)); 73extern void set_signal __P((int, char *)); 74 75extern void restore_default_signal __P((int)); 76extern void ignore_signal __P((int)); 77extern int run_exit_trap __P((void)); 78extern void run_trap_cleanup __P((int)); 79extern int run_debug_trap __P((void)); 80extern void run_error_trap __P((void)); 81extern void run_return_trap __P((void)); 82 83extern void free_trap_strings __P((void)); 84extern void reset_signal_handlers __P((void)); 85extern void restore_original_signals __P((void)); 86 87extern char *signal_name __P((int)); 88 89extern int decode_signal __P((char *, int)); 90extern void run_interrupt_trap __P((void)); 91extern int maybe_call_trap_handler __P((int)); 92extern int signal_is_trapped __P((int)); 93extern int signal_is_ignored __P((int)); 94extern int signal_is_special __P((int)); 95extern void set_signal_ignored __P((int)); 96extern int signal_in_progress __P((int)); 97 98#endif /* _TRAP_H_ */ 99