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1/* The proper definitions for Linux/SPARC sigaction.
2 Copyright (C) 1996-2025 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
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.
9
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
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#ifndef _BITS_SIGACTION_H
20#define _BITS_SIGACTION_H 1
21
22#ifndef _SIGNAL_H
23# error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
24#endif
25
26#include <bits/wordsize.h>
27
28/* Structure describing the action to be taken when a signal arrives. */
29struct sigaction
30 {
31 /* Signal handler. */
32#if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED
33 union
34 {
35 /* Used if SA_SIGINFO is not set. */
36 __sighandler_t sa_handler;
37 /* Used if SA_SIGINFO is set. */
38 void (*sa_sigaction) (int, siginfo_t *, void *);
39 }
40 __sigaction_handler;
41# define sa_handler __sigaction_handler.sa_handler
42# define sa_sigaction __sigaction_handler.sa_sigaction
43#else
44 __sighandler_t sa_handler;
45#endif
46
47 /* Additional set of signals to be blocked. */
48 __sigset_t sa_mask;
49
50 /* Special flags. */
51#if __WORDSIZE == 64
52 int __glibc_reserved0;
53#endif
54 int sa_flags;
55
56 /* Not used by Linux/Sparc yet. */
57 void (*sa_restorer) (void);
58 };
59
60
61/* Bits in `sa_flags'. */
62#define SA_NOCLDSTOP 0x00000008 /* Don't send SIGCHLD when children stop. */
63#define SA_NOCLDWAIT 0x00000100 /* Don't create zombie on child death. */
64#define SA_SIGINFO 0x00000200 /* Invoke signal-catching function with
65 three arguments instead of one. */
66#if defined __USE_XOPEN_EXTENDED || defined __USE_MISC
67# define SA_ONSTACK 0x00000001 /* Use signal stack by using `sa_restorer'. */
68#endif
69#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
70# define SA_RESTART 0x00000002 /* Restart syscall on signal return. */
71# define SA_NODEFER 0x00000020 /* Don't automatically block the signal when
72 its handler is being executed. */
73# define SA_RESETHAND 0x00000004 /* Reset to SIG_DFL on entry to handler. */
74#endif
75#ifdef __USE_MISC
76# define SA_INTERRUPT 0x00000010 /* Historical no-op. */
77
78/* Some aliases for the SA_ constants. */
79# define SA_NOMASK SA_NODEFER
80# define SA_ONESHOT SA_RESETHAND
81# define SA_STACK SA_ONSTACK
82#endif
83
84/* Values for the HOW argument to `sigprocmask'. */
85#define SIG_BLOCK 1 /* Block signals. */
86#define SIG_UNBLOCK 2 /* Unblock signals. */
87#define SIG_SETMASK 4 /* Set the set of blocked signals. */
88
89#endif