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726f6388 JA |
1 | /* trap.h -- data structures used in the trap mechanism. */ |
2 | ||
012bac39 | 3 | /* Copyright (C) 1993-2009 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
2e4498b3 CR |
7 | Bash is free software: you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
726f6388 | 11 | |
2e4498b3 CR |
12 | Bash is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
726f6388 | 16 | |
2e4498b3 CR |
17 | You should have received a copy of the GNU General Public License |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
726f6388 | 20 | |
ccc6cda3 JA |
21 | #if !defined (_TRAP_H_) |
22 | #define _TRAP_H_ | |
726f6388 JA |
23 | |
24 | #include "stdc.h" | |
25 | ||
26 | #if !defined (SIG_DFL) | |
d166f048 | 27 | #include "bashtypes.h" |
726f6388 JA |
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 | |
d3a24ed2 CR |
36 | #define DEFAULT_SIG SIG_DFL |
37 | #define IGNORE_SIG SIG_IGN | |
726f6388 | 38 | |
ccc6cda3 | 39 | /* Special shell trap names. */ |
d3a24ed2 CR |
40 | #define DEBUG_TRAP NSIG |
41 | #define ERROR_TRAP NSIG+1 | |
42 | #define RETURN_TRAP NSIG+2 | |
43 | #define EXIT_TRAP 0 | |
ccc6cda3 | 44 | |
f73dda09 | 45 | /* system signals plus special bash traps */ |
d3a24ed2 | 46 | #define BASH_NSIG NSIG+3 |
f73dda09 | 47 | |
d3a24ed2 CR |
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) | |
726f6388 | 53 | |
f73dda09 JA |
54 | #define TRAP_STRING(s) \ |
55 | (signal_is_trapped (s) && signal_is_ignored (s) == 0) ? trap_list[s] \ | |
56 | : (char *)NULL | |
57 | ||
ccc6cda3 | 58 | extern char *trap_list[]; |
726f6388 JA |
59 | |
60 | /* Externally-visible functions declared in trap.c. */ | |
61 | extern void initialize_traps __P((void)); | |
d3a24ed2 | 62 | |
726f6388 | 63 | extern void run_pending_traps __P((void)); |
d3a24ed2 | 64 | |
726f6388 | 65 | extern void maybe_set_sigchld_trap __P((char *)); |
ed35cb4a | 66 | extern void set_impossible_sigchld_trap __P((void)); |
726f6388 | 67 | extern void set_sigchld_trap __P((char *)); |
d3a24ed2 | 68 | |
ccc6cda3 | 69 | extern void set_debug_trap __P((char *)); |
f73dda09 | 70 | extern void set_error_trap __P((char *)); |
d3a24ed2 CR |
71 | extern void set_return_trap __P((char *)); |
72 | ||
ccc6cda3 | 73 | extern void set_sigint_trap __P((char *)); |
726f6388 | 74 | extern void set_signal __P((int, char *)); |
d3a24ed2 | 75 | |
726f6388 JA |
76 | extern void restore_default_signal __P((int)); |
77 | extern void ignore_signal __P((int)); | |
78 | extern int run_exit_trap __P((void)); | |
ccc6cda3 | 79 | extern void run_trap_cleanup __P((int)); |
d3a24ed2 | 80 | extern int run_debug_trap __P((void)); |
f73dda09 | 81 | extern void run_error_trap __P((void)); |
d3a24ed2 CR |
82 | extern void run_return_trap __P((void)); |
83 | ||
726f6388 JA |
84 | extern void free_trap_strings __P((void)); |
85 | extern void reset_signal_handlers __P((void)); | |
86 | extern void restore_original_signals __P((void)); | |
87 | ||
88 | extern char *signal_name __P((int)); | |
89 | ||
d3a24ed2 | 90 | extern int decode_signal __P((char *, int)); |
726f6388 JA |
91 | extern void run_interrupt_trap __P((void)); |
92 | extern int maybe_call_trap_handler __P((int)); | |
93 | extern int signal_is_trapped __P((int)); | |
726f6388 | 94 | extern int signal_is_ignored __P((int)); |
ccc6cda3 JA |
95 | extern int signal_is_special __P((int)); |
96 | extern void set_signal_ignored __P((int)); | |
f75912ae | 97 | extern int signal_in_progress __P((int)); |
726f6388 | 98 | |
ccc6cda3 | 99 | #endif /* _TRAP_H_ */ |