sigcompat.c revision 56698 
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 * $FreeBSD: head/lib/libc/compat-43/sigcompat.c 56698 2000-01-27 23:07:25Z jasone $
34 */
35
36#if defined(LIBC_SCCS) && !defined(lint)
37#if 0
38static char sccsid[] = "@(#)sigcompat.c	8.1 (Berkeley) 6/2/93";
39#endif
40static const char rcsid[] =
41  "$FreeBSD: head/lib/libc/compat-43/sigcompat.c 56698 2000-01-27 23:07:25Z jasone $";
42#endif /* LIBC_SCCS and not lint */
43
44#include <sys/param.h>
45#include <signal.h>
46
47int
48sigvec(signo, sv, osv)
49	int signo;
50	struct sigvec *sv, *osv;
51{
52	struct sigaction sa, osa;
53	struct sigaction *sap, *osap;
54	int ret;
55
56	if (sv != NULL) {
57		sa.sa_handler = sv->sv_handler;
58		sa.sa_flags = sv->sv_flags ^ SV_INTERRUPT;
59		sigemptyset(&sa.sa_mask);
60		sa.sa_mask.__bits[0] = sv->sv_mask;
61		sap = &sa;
62	} else
63		sap = NULL;
64	osap = osv != NULL ? &osa : NULL;
65	ret = sigaction(signo, sap, osap);
66	if (ret == 0 && osv != NULL) {
67		osv->sv_handler = osa.sa_handler;
68		osv->sv_flags = osa.sa_flags ^ SV_INTERRUPT;
69		osv->sv_mask = osa.sa_mask.__bits[0];
70	}
71	return (ret);
72}
73
74int
75sigsetmask(mask)
76	int mask;
77{
78	sigset_t set, oset;
79	int n;
80
81	sigemptyset(&set);
82	set.__bits[0] = mask;
83	n = sigprocmask(SIG_SETMASK, &set, &oset);
84	if (n)
85		return (n);
86	return (oset.__bits[0]);
87}
88
89int
90sigblock(mask)
91	int mask;
92{
93	sigset_t set, oset;
94	int n;
95
96	sigemptyset(&set);
97	set.__bits[0] = mask;
98	n = sigprocmask(SIG_BLOCK, &set, &oset);
99	if (n)
100		return (n);
101	return (oset.__bits[0]);
102}
103
104int
105sigpause(mask)
106	int mask;
107{
108	sigset_t set;
109
110	sigemptyset(&set);
111	set.__bits[0] = mask;
112	return (_sigsuspend(&set));
113}
114