sigsetops.c revision 90039 
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)
37static char sccsid[] = "@(#)sigsetops.c	8.1 (Berkeley) 6/4/93";
38#endif /* LIBC_SCCS and not lint */
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: head/lib/libc/gen/sigsetops.c 90039 2002-02-01 00:57:29Z obrien $");
41
42#include <errno.h>
43#include <signal.h>
44
45int
46sigaddset(set, signo)
47	sigset_t *set;
48	int signo;
49{
50
51	if (signo <= 0 || signo > _SIG_MAXSIG) {
52		errno = EINVAL;
53		return (-1);
54	}
55	set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo);
56	return (0);
57}
58
59int
60sigdelset(set, signo)
61	sigset_t *set;
62	int signo;
63{
64
65	if (signo <= 0 || signo > _SIG_MAXSIG) {
66		errno = EINVAL;
67		return (-1);
68	}
69	set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo);
70	return (0);
71}
72
73int
74sigemptyset(set)
75	sigset_t *set;
76{
77	int i;
78
79	for (i = 0; i < _SIG_WORDS; i++)
80		set->__bits[i] = 0;
81	return (0);
82}
83
84int
85sigfillset(set)
86	sigset_t *set;
87{
88	int i;
89
90	for (i = 0; i < _SIG_WORDS; i++)
91		set->__bits[i] = ~0U;
92	return (0);
93}
94
95int
96sigismember(set, signo)
97	const sigset_t *set;
98	int signo;
99{
100
101	if (signo <= 0 || signo > _SIG_MAXSIG) {
102		errno = EINVAL;
103		return (-1);
104	}
105	return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0);
106}
107