xref: /freebsd/lib/libc/compat-43/sigcompat.c (revision e4e9813eb92cd7c4d4b819a8fbed5cbd3d92f5d8)
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 
34 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid[] = "@(#)sigcompat.c	8.1 (Berkeley) 6/2/93";
36 #endif /* LIBC_SCCS and not lint */
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39 
40 #include "namespace.h"
41 #include <sys/param.h>
42 #include <signal.h>
43 #include "un-namespace.h"
44 #include "libc_private.h"
45 
46 int
47 sigvec(signo, sv, osv)
48 	int signo;
49 	struct sigvec *sv, *osv;
50 {
51 	struct sigaction sa, osa;
52 	struct sigaction *sap, *osap;
53 	int ret;
54 
55 	if (sv != NULL) {
56 		sa.sa_handler = sv->sv_handler;
57 		sa.sa_flags = sv->sv_flags ^ SV_INTERRUPT;
58 		sigemptyset(&sa.sa_mask);
59 		sa.sa_mask.__bits[0] = sv->sv_mask;
60 		sap = &sa;
61 	} else
62 		sap = NULL;
63 	osap = osv != NULL ? &osa : NULL;
64 	ret = _sigaction(signo, sap, osap);
65 	if (ret == 0 && osv != NULL) {
66 		osv->sv_handler = osa.sa_handler;
67 		osv->sv_flags = osa.sa_flags ^ SV_INTERRUPT;
68 		osv->sv_mask = osa.sa_mask.__bits[0];
69 	}
70 	return (ret);
71 }
72 
73 int
74 sigsetmask(mask)
75 	int mask;
76 {
77 	sigset_t set, oset;
78 	int n;
79 
80 	sigemptyset(&set);
81 	set.__bits[0] = mask;
82 	n = _sigprocmask(SIG_SETMASK, &set, &oset);
83 	if (n)
84 		return (n);
85 	return (oset.__bits[0]);
86 }
87 
88 int
89 sigblock(mask)
90 	int mask;
91 {
92 	sigset_t set, oset;
93 	int n;
94 
95 	sigemptyset(&set);
96 	set.__bits[0] = mask;
97 	n = _sigprocmask(SIG_BLOCK, &set, &oset);
98 	if (n)
99 		return (n);
100 	return (oset.__bits[0]);
101 }
102 
103 int
104 sigpause(mask)
105 	int mask;
106 {
107 	sigset_t set;
108 
109 	sigemptyset(&set);
110 	set.__bits[0] = mask;
111 	return (_sigsuspend(&set));
112 }
113