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
sigaction(int sig,struct sigaction * sigact,struct sigaction * osigact)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
sigemptyset(sigset_t * mask)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
sigprocmask(int mode,sigset_t * mask,sigset_t * omask)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
sigsuspend(sigset_t * mask)91 sigsuspend (sigset_t *mask)
92 {
93 if (!mask) {
94 errno = EINVAL;
95 return -1;
96 }
97 return sigpause(*mask);
98 }
99
100 int
sigdelset(sigset_t * mask,int sig)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
sigaddset(sigset_t * mask,int sig)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
sigismember(sigset_t * mask,int sig)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