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c14e4c32 | 1 | /* The proper definitions for Linux's sigaction. |
d614a753 | 2 | Copyright (C) 1993-2020 Free Software Foundation, Inc. |
6d52618b | 3 | This file is part of the GNU C Library. |
c14e4c32 | 4 | |
6d52618b | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 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. | |
c14e4c32 | 9 | |
6d52618b 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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
c14e4c32 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
c14e4c32 | 18 | |
a1ede3a4 ST |
19 | #ifndef _BITS_SIGACTION_H |
20 | #define _BITS_SIGACTION_H 1 | |
21 | ||
f4017d20 UD |
22 | #ifndef _SIGNAL_H |
23 | # error "Never include <bits/sigaction.h> directly; use <signal.h> instead." | |
24 | #endif | |
25 | ||
c14e4c32 RM |
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 |
cbdee279 UD |
31 | union |
32 | { | |
33 | /* Used if SA_SIGINFO is not set. */ | |
34 | __sighandler_t sa_handler; | |
35 | /* Used if SA_SIGINFO is set. */ | |
39d1d4e5 | 36 | void (*sa_sigaction) (int, siginfo_t *, void *); |
cbdee279 UD |
37 | } |
38 | __sigaction_handler; | |
f540c0a4 UD |
39 | # define sa_handler __sigaction_handler.sa_handler |
40 | # define sa_sigaction __sigaction_handler.sa_sigaction | |
41 | #else | |
42 | __sighandler_t sa_handler; | |
43 | #endif | |
c14e4c32 RM |
44 | |
45 | /* Additional set of signals to be blocked. */ | |
46 | __sigset_t sa_mask; | |
47 | ||
48 | /* Special flags. */ | |
6d52618b | 49 | int sa_flags; |
c14e4c32 RM |
50 | |
51 | /* Restore handler. */ | |
39d1d4e5 | 52 | void (*sa_restorer) (void); |
c14e4c32 RM |
53 | }; |
54 | ||
55 | /* Bits in `sa_flags'. */ | |
ca34d7a7 | 56 | #define SA_NOCLDSTOP 1 /* Don't send SIGCHLD when children stop. */ |
8ce9ea0c | 57 | #define SA_NOCLDWAIT 2 /* Don't create zombie on child death. */ |
cbdee279 UD |
58 | #define SA_SIGINFO 4 /* Invoke signal-catching function with |
59 | three arguments instead of one. */ | |
cd65836b | 60 | #if defined __USE_XOPEN_EXTENDED || defined __USE_MISC |
cbdee279 | 61 | # define SA_ONSTACK 0x08000000 /* Use signal stack by using `sa_restorer'. */ |
33780b6d | 62 | #endif |
cd65836b | 63 | #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 |
ca34d7a7 | 64 | # define SA_RESTART 0x10000000 /* Restart syscall on signal return. */ |
ca34d7a7 UD |
65 | # define SA_NODEFER 0x40000000 /* Don't automatically block the signal when |
66 | its handler is being executed. */ | |
67 | # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */ | |
cbdee279 UD |
68 | #endif |
69 | #ifdef __USE_MISC | |
70 | # define SA_INTERRUPT 0x20000000 /* Historical no-op. */ | |
c14e4c32 RM |
71 | |
72 | /* Some aliases for the SA_ constants. */ | |
ca34d7a7 UD |
73 | # define SA_NOMASK SA_NODEFER |
74 | # define SA_ONESHOT SA_RESETHAND | |
cbdee279 | 75 | # define SA_STACK SA_ONSTACK |
c14e4c32 RM |
76 | #endif |
77 | ||
78 | /* Values for the HOW argument to `sigprocmask'. */ | |
ca34d7a7 UD |
79 | #define SIG_BLOCK 0 /* Block signals. */ |
80 | #define SIG_UNBLOCK 1 /* Unblock signals. */ | |
81 | #define SIG_SETMASK 2 /* Set the set of blocked signals. */ | |
a1ede3a4 ST |
82 | |
83 | #endif |