]>
Commit | Line | Data |
---|---|---|
77569014 | 1 | /* The proper definitions for Linux/Alpha sigaction. |
d614a753 | 2 | Copyright (C) 1996-2020 Free Software Foundation, Inc. |
36e28152 | 3 | This file is part of the GNU C Library. |
77569014 | 4 | |
36e28152 | 5 | The GNU C Library is free software; you can redistribute it and/or |
3214b89b AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
77569014 | 9 | |
36e28152 UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3214b89b | 13 | Lesser General Public License for more details. |
77569014 | 14 | |
3214b89b | 15 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff | 16 | License along with the GNU C Library. If not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
77569014 | 18 | |
a1ede3a4 ST |
19 | #ifndef _BITS_SIGACTION_H |
20 | #define _BITS_SIGACTION_H 1 | |
21 | ||
90571408 UD |
22 | #ifndef _SIGNAL_H |
23 | # error "Never include <bits/sigaction.h> directly; use <signal.h> instead." | |
24 | #endif | |
25 | ||
77569014 UD |
26 | /* Structure describing the action to be taken when a signal arrives. */ |
27 | struct sigaction | |
28 | { | |
29 | /* Signal handler. */ | |
cd65836b | 30 | #if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED |
12b8ab07 UD |
31 | union |
32 | { | |
33 | /* Used if SA_SIGINFO is not set. */ | |
34 | __sighandler_t sa_handler; | |
35 | /* Used if SA_SIGINFO is set. */ | |
36 | void (*sa_sigaction) (int, siginfo_t *, void *); | |
37 | } | |
38 | __sigaction_handler; | |
39 | # define sa_handler __sigaction_handler.sa_handler | |
40 | # define sa_sigaction __sigaction_handler.sa_sigaction | |
41 | #else | |
77569014 | 42 | __sighandler_t sa_handler; |
12b8ab07 | 43 | #endif |
77569014 UD |
44 | |
45 | /* Additional set of signals to be blocked. */ | |
46 | __sigset_t sa_mask; | |
47 | ||
48 | /* Special flags. */ | |
de9d8f20 | 49 | int sa_flags; |
77569014 UD |
50 | }; |
51 | ||
52 | /* Bits in `sa_flags'. */ | |
17cf8c5c | 53 | #define SA_NOCLDSTOP 0x00000004 /* Don't send SIGCHLD when children stop. */ |
15833193 | 54 | #define SA_NOCLDWAIT 0x00000020 /* Don't create zombie on child death. */ |
0f2d3294 UD |
55 | #define SA_SIGINFO 0x00000040 /* Invoke signal-catching function with |
56 | three arguments instead of one. */ | |
cd65836b | 57 | #if defined __USE_XOPEN_EXTENDED || defined __USE_MISC |
b7204490 | 58 | # define SA_ONSTACK 0x00000001 /* Use signal stack by using `sa_restorer'. */ |
1480094d | 59 | #endif |
cd65836b | 60 | #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 |
17cf8c5c | 61 | # define SA_RESTART 0x00000002 /* Restart syscall on signal return. */ |
0f2d3294 | 62 | # define SA_NODEFER 0x00000008 /* Don't automatically block the signal |
17cf8c5c | 63 | when its handler is being executed. */ |
0f2d3294 UD |
64 | # define SA_RESETHAND 0x00000010 /* Reset to SIG_DFL on entry to handler. */ |
65 | #endif | |
66 | #ifdef __USE_MISC | |
67 | # define SA_INTERRUPT 0x20000000 /* Historical no-op. */ | |
77569014 UD |
68 | |
69 | /* Some aliases for the SA_ constants. */ | |
0f2d3294 UD |
70 | # define SA_NOMASK SA_NODEFER |
71 | # define SA_ONESHOT SA_RESETHAND | |
b7204490 | 72 | # define SA_STACK SA_ONSTACK |
77569014 UD |
73 | #endif |
74 | ||
75 | /* Values for the HOW argument to `sigprocmask'. */ | |
17cf8c5c UD |
76 | #define SIG_BLOCK 1 /* Block signals. */ |
77 | #define SIG_UNBLOCK 2 /* Unblock signals. */ | |
78 | #define SIG_SETMASK 3 /* Set the set of blocked signals. */ | |
a1ede3a4 ST |
79 | |
80 | #endif |