xref: /freebsd/crypto/openssh/openbsd-compat/sigact.c (revision dd41de95a84d979615a2ef11df6850622bf6184e)
1 /*	$OpenBSD: sigaction.c,v 1.4 2001/01/22 18:01:48 millert Exp $	*/
2 
3 /****************************************************************************
4  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
5  *                                                                          *
6  * Permission is hereby granted, free of charge, to any person obtaining a  *
7  * copy of this software and associated documentation files (the            *
8  * "Software"), to deal in the Software without restriction, including      *
9  * without limitation the rights to use, copy, modify, merge, publish,      *
10  * distribute, distribute with modifications, sublicense, and/or sell       *
11  * copies of the Software, and to permit persons to whom the Software is    *
12  * furnished to do so, subject to the following conditions:                 *
13  *                                                                          *
14  * The above copyright notice and this permission notice shall be included  *
15  * in all copies or substantial portions of the Software.                   *
16  *                                                                          *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
20  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
23  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
24  *                                                                          *
25  * Except as contained in this notice, the name(s) of the above copyright   *
26  * holders shall not be used in advertising or otherwise to promote the     *
27  * sale, use or other dealings in this Software without prior written       *
28  * authorization.                                                           *
29  ****************************************************************************/
30 
31 /****************************************************************************
32  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
33  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
34  ****************************************************************************/
35 
36 /* OPENBSD ORIGINAL: lib/libcurses/base/sigaction.c */
37 
38 #include "includes.h"
39 #include <errno.h>
40 #include <signal.h>
41 #include "sigact.h"
42 
43 /* This file provides sigaction() emulation using sigvec() */
44 /* Use only if this is non POSIX system */
45 
46 #if !HAVE_SIGACTION && HAVE_SIGVEC
47 
48 int
49 sigaction(int sig, struct sigaction *sigact, struct sigaction *osigact)
50 {
51 	return sigvec(sig, sigact ? &sigact->sv : NULL,
52 	    osigact ? &osigact->sv : NULL);
53 }
54 
55 int
56 sigemptyset (sigset_t *mask)
57 {
58 	if (!mask) {
59 		errno = EINVAL;
60 		return -1;
61 	}
62 	*mask = 0;
63 	return 0;
64 }
65 
66 int
67 sigprocmask (int mode, sigset_t *mask, sigset_t *omask)
68 {
69 	sigset_t current = sigsetmask(0);
70 
71 	if (!mask) {
72 		errno = EINVAL;
73 		return -1;
74 	}
75 
76 	if (omask)
77 		*omask = current;
78 
79 	if (mode == SIG_BLOCK)
80 		current |= *mask;
81 	else if (mode == SIG_UNBLOCK)
82 		current &= ~*mask;
83 	else if (mode == SIG_SETMASK)
84 	current = *mask;
85 
86 	sigsetmask(current);
87 	return 0;
88 }
89 
90 int
91 sigsuspend (sigset_t *mask)
92 {
93 	if (!mask) {
94 		errno = EINVAL;
95 		return -1;
96 	}
97 	return sigpause(*mask);
98 }
99 
100 int
101 sigdelset (sigset_t *mask, int sig)
102 {
103 	if (!mask) {
104 		errno = EINVAL;
105 		return -1;
106 	}
107 	*mask &= ~sigmask(sig);
108 	return 0;
109 }
110 
111 int
112 sigaddset (sigset_t *mask, int sig)
113 {
114 	if (!mask) {
115 		errno = EINVAL;
116 		return -1;
117 	}
118 	*mask |= sigmask(sig);
119 	return 0;
120 }
121 
122 int
123 sigismember (sigset_t *mask, int sig)
124 {
125 	if (!mask) {
126 		errno = EINVAL;
127 		return -1;
128 	}
129 	return (*mask & sigmask(sig)) != 0;
130 }
131 
132 #endif
133