sigsetops.c revision 51872 
1/*-
2 * Copyright (c) 1989, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)sigsetops.c	8.1 (Berkeley) 6/4/93
34 */
35
36#if defined(LIBC_SCCS) && !defined(lint)
37#if 0
38static char sccsid[] = "@(#)sigsetops.c	8.1 (Berkeley) 6/4/93";
39#endif
40static const char rcsid[] =
41  "$FreeBSD: head/lib/libc/gen/sigsetops.c 51872 1999-10-02 19:37:14Z marcel $";
42#endif /* LIBC_SCCS and not lint */
43
44#include <errno.h>
45#include <signal.h>
46
47int
48sigaddset(set, signo)
49	sigset_t *set;
50	int signo;
51{
52
53	if (signo <= 0 || signo > _SIG_MAXSIG) {
54		errno = EINVAL;
55		return (-1);
56	}
57	set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo);
58	return (0);
59}
60
61int
62sigdelset(set, signo)
63	sigset_t *set;
64	int signo;
65{
66
67	if (signo <= 0 || signo > _SIG_MAXSIG) {
68		errno = EINVAL;
69		return (-1);
70	}
71	set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo);
72	return (0);
73}
74
75int
76sigemptyset(set)
77	sigset_t *set;
78{
79	int i;
80
81	for (i = 0; i < _SIG_WORDS; i++)
82		set->__bits[i] = 0;
83	return (0);
84}
85
86int
87sigfillset(set)
88	sigset_t *set;
89{
90	int i;
91
92	for (i = 0; i < _SIG_WORDS; i++)
93		set->__bits[i] = ~0U;
94	return (0);
95}
96
97int
98sigismember(set, signo)
99	const sigset_t *set;
100	int signo;
101{
102
103	if (signo <= 0 || signo > _SIG_MAXSIG) {
104		errno = EINVAL;
105		return (-1);
106	}
107	return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0);
108}
109