1/* $OpenBSD: signal.h,v 1.27 2026/03/23 21:33:43 daniel Exp $ */
2/* $NetBSD: signal.h,v 1.8 1996/02/29 00:04:57 jtc Exp $ */
3
4/*-
5 * Copyright (c) 1991, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)signal.h 8.3 (Berkeley) 3/30/94
33 */
34
35#ifndef _USER_SIGNAL_H
36#define _USER_SIGNAL_H
37
38#include <sys/signal.h>
39
40#if __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE
41#include <sys/types.h>
42#endif
43
44__BEGIN_DECLS
45#if __BSD_VISIBLE
46extern const char *const sys_signame[_NSIG];
47extern const char *const sys_siglist[_NSIG];
48#endif
49
50int raise(int);
51#if __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE
52#if __BSD_VISIBLE || (__XPG_VISIBLE >= 500 && __XPG_VISIBLE < 700)
53void (*bsd_signal(int, void (*)(int)))(int);
54#endif
55int kill(pid_t, int);
56int sigaction(int, const struct sigaction *__restrict,
57 struct sigaction *__restrict);
58int sigaddset(sigset_t *, int);
59int sigdelset(sigset_t *, int);
60int sigemptyset(sigset_t *);
61int sigfillset(sigset_t *);
62int sigismember(const sigset_t *, int);
63int sigpending(sigset_t *);
64int sigprocmask(int, const sigset_t *__restrict, sigset_t *__restrict);
65#if __POSIX_VISIBLE >= 199506
66int pthread_sigmask(int, const sigset_t *__restrict, sigset_t *__restrict);
67#endif
68int sigsuspend(const sigset_t *);
69
70#if !defined(_ANSI_LIBRARY)
71
72extern int *__errno(void);
73
74__only_inline int sigaddset(sigset_t *__set, int __signo)
75{
76 if (__signo <= 0 || __signo >= _NSIG) {
77 *__errno() = 22; /* EINVAL */
78 return -1;
79 }
80 *__set |= (1U << ((__signo)-1)); /* sigmask(__signo) */
81 return (0);
82}
83
84__only_inline int sigdelset(sigset_t *__set, int __signo)
85{
86 if (__signo <= 0 || __signo >= _NSIG) {
87 *__errno() = 22; /* EINVAL */
88 return -1;
89 }
90 *__set &= ~(1U << ((__signo)-1)); /* sigmask(__signo) */
91 return (0);
92}
93
94__only_inline int sigismember(const sigset_t *__set, int __signo)
95{
96 if (__signo <= 0 || __signo >= _NSIG) {
97 *__errno() = 22; /* EINVAL */
98 return -1;
99 }
100 return ((*__set & (1U << ((__signo)-1))) != 0);
101}
102
103__only_inline int sigemptyset(sigset_t *__set)
104{
105 *__set = 0;
106 return (0);
107}
108
109__only_inline int sigfillset(sigset_t *__set)
110{
111 *__set = ~(sigset_t)0;
112 return (0);
113}
114
115#endif /* !_ANSI_LIBRARY */
116
117#if __BSD_VISIBLE || __XPG_VISIBLE >= 420
118int killpg(pid_t, int);
119int siginterrupt(int, int);
120int sigaltstack(const struct sigaltstack *__restrict,
121 struct sigaltstack *__restrict);
122#if __BSD_VISIBLE
123int sigblock(int);
124/* This is the traditional BSD sigpause() and not the XPG/POSIX sigpause(). */
125int sigpause(int);
126int sigsetmask(int);
127int sigvec(int, struct sigvec *, struct sigvec *);
128int thrkill(pid_t _tid, int _signum, void *_tcb);
129#endif
130#endif /* __BSD_VISIBLE || __XPG_VISIBLE >= 420 */
131#if __BSD_VISIBLE || __POSIX_VISIBLE >= 199309 || __XPG_VISIBLE >= 500
132int sigwait(const sigset_t *__restrict, int *__restrict);
133#endif
134#if __BSD_VISIBLE || __POSIX_VISIBLE >= 200809
135void psignal(int, const char *);
136#endif
137#endif /* __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE */
138__END_DECLS
139
140#endif /* !_USER_SIGNAL_H */