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dff8da6b | 1 | /* Copyright (C) 1991-2024 Free Software Foundation, Inc. |
478b92f0 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
478b92f0 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
478b92f0 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
28f540f4 | 17 | |
a1ede3a4 ST |
18 | #ifndef _BITS_SIGACTION_H |
19 | #define _BITS_SIGACTION_H 1 | |
20 | ||
f4017d20 UD |
21 | #ifndef _SIGNAL_H |
22 | # error "Never include <bits/sigaction.h> directly; use <signal.h> instead." | |
23 | #endif | |
24 | ||
28f540f4 RM |
25 | /* These definitions match those used by the 4.4 BSD kernel. |
26 | If the operating system has a `sigaction' system call that correctly | |
27 | implements the POSIX.1 behavior, there should be a system-dependent | |
28 | version of this file that defines `struct sigaction' and the `SA_*' | |
29 | constants appropriately. */ | |
30 | ||
31 | /* Structure describing the action to be taken when a signal arrives. */ | |
32 | struct sigaction | |
33 | { | |
34 | /* Signal handler. */ | |
cd65836b | 35 | #if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED |
bedbf86c RM |
36 | union |
37 | { | |
38 | /* Used if SA_SIGINFO is not set. */ | |
39 | __sighandler_t sa_handler; | |
40 | /* Used if SA_SIGINFO is set. */ | |
41 | void (*sa_sigaction) (int, siginfo_t *, void *); | |
42 | } | |
43 | __sigaction_handler; | |
44 | # define sa_handler __sigaction_handler.sa_handler | |
45 | # define sa_sigaction __sigaction_handler.sa_sigaction | |
46 | #else | |
47 | __sighandler_t sa_handler; | |
48 | #endif | |
28f540f4 RM |
49 | |
50 | /* Additional set of signals to be blocked. */ | |
51 | __sigset_t sa_mask; | |
52 | ||
53 | /* Special flags. */ | |
54 | int sa_flags; | |
55 | }; | |
56 | ||
57 | /* Bits in `sa_flags'. */ | |
cd65836b | 58 | #if defined __USE_XOPEN_EXTENDED || defined __USE_MISC |
7ce241a0 | 59 | # define SA_ONSTACK 0x0001 /* Take signal on signal stack. */ |
ee16e894 | 60 | #endif |
cd65836b | 61 | #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 |
7ce241a0 | 62 | # define SA_RESTART 0x0002 /* Restart syscall on signal return. */ |
393aec52 RM |
63 | # define SA_NODEFER 0x0010 /* Don't automatically block the signal when |
64 | its handler is being executed. */ | |
65 | # define SA_RESETHAND 0x0004 /* Reset to SIG_DFL on entry to handler. */ | |
28f540f4 | 66 | #endif |
7ce241a0 | 67 | #define SA_NOCLDSTOP 0x0008 /* Don't send SIGCHLD when children stop. */ |
d865ff74 | 68 | #define SA_SIGINFO 0x0040 /* Signal handler with SA_SIGINFO args */ |
28f540f4 | 69 | |
393aec52 RM |
70 | #ifdef __USE_MISC |
71 | # define SA_INTERRUPT 0 /* Historical no-op ("not SA_RESTART"). */ | |
72 | ||
73 | /* Some aliases for the SA_ constants. */ | |
74 | # define SA_NOMASK SA_NODEFER | |
75 | # define SA_ONESHOT SA_RESETHAND | |
76 | # define SA_STACK SA_ONSTACK | |
77 | #endif | |
78 | ||
28f540f4 RM |
79 | |
80 | /* Values for the HOW argument to `sigprocmask'. */ | |
81 | #define SIG_BLOCK 1 /* Block signals. */ | |
82 | #define SIG_UNBLOCK 2 /* Unblock signals. */ | |
83 | #define SIG_SETMASK 3 /* Set the set of blocked signals. */ | |
a1ede3a4 ST |
84 | |
85 | #endif |