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 <signal.h>
40 #include "sigact.h"
41 
42 /* This file provides sigaction() emulation using sigvec() */
43 /* Use only if this is non POSIX system */
44 
45 #if !HAVE_SIGACTION && HAVE_SIGVEC
46 
47 int
48 sigaction(int sig, struct sigaction *sigact, struct sigaction *osigact)
49 {
50 	return sigvec(sig, &(sigact->sv), &(osigact->sv));
51 }
52 
53 int
54 sigemptyset (sigset_t * mask)
55 {
56 	*mask = 0;
57 	return 0;
58 }
59 
60 int
61 sigprocmask (int mode, sigset_t * mask, sigset_t * omask)
62 {
63 	sigset_t current = sigsetmask(0);
64 
65 	if (omask) *omask = current;
66 
67 	if (mode==SIG_BLOCK)
68 		current |= *mask;
69 	else if (mode==SIG_UNBLOCK)
70 		current &= ~*mask;
71 	else if (mode==SIG_SETMASK)
72 	current = *mask;
73 
74 	sigsetmask(current);
75 	return 0;
76 }
77 
78 int
79 sigsuspend (sigset_t * mask)
80 {
81 	return sigpause(*mask);
82 }
83 
84 int
85 sigdelset (sigset_t * mask, int sig)
86 {
87 	*mask &= ~sigmask(sig);
88 	return 0;
89 }
90 
91 int
92 sigaddset (sigset_t * mask, int sig)
93 {
94 	*mask |= sigmask(sig);
95 	return 0;
96 }
97 
98 int
99 sigismember (sigset_t * mask, int sig)
100 {
101 	return (*mask & sigmask(sig)) != 0;
102 }
103 
104 #endif
105