1/*	$OpenBSD: sigsetops.c,v 1.7 2015/09/12 16:46:12 guenther Exp $ */
2/*-
3 * Copyright (c) 1989, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the University nor the names of its contributors
15 *    may be used to endorse or promote products derived from this software
16 *    without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 *	@(#)sigsetops.c	8.1 (Berkeley) 6/4/93
31 */
32
33#define _ANSI_LIBRARY
34#include <errno.h>
35#include <signal.h>
36
37#undef sigemptyset
38#undef sigfillset
39#undef sigaddset
40#undef sigdelset
41#undef sigismember
42
43int
44sigemptyset(sigset_t *set)
45{
46	*set = 0;
47	return (0);
48}
49DEF_WEAK(sigemptyset);
50
51int
52sigfillset(sigset_t *set)
53{
54	*set = ~(sigset_t)0;
55	return (0);
56}
57DEF_WEAK(sigfillset);
58
59int
60sigaddset(sigset_t *set, int signo)
61{
62	if (signo <= 0 || signo >= NSIG) {
63		errno = EINVAL;
64		return -1;
65	}
66	*set |= sigmask(signo);
67	return (0);
68}
69DEF_WEAK(sigaddset);
70
71int
72sigdelset(sigset_t *set, int signo)
73{
74	if (signo <= 0 || signo >= NSIG) {
75		errno = EINVAL;
76		return -1;
77	}
78	*set &= ~sigmask(signo);
79	return (0);
80}
81DEF_WEAK(sigdelset);
82
83int
84sigismember(const sigset_t *set, int signo)
85{
86	if (signo <= 0 || signo >= NSIG) {
87		errno = EINVAL;
88		return -1;
89	}
90	return ((*set & sigmask(signo)) != 0);
91}
92DEF_WEAK(sigismember);
93