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