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
48int
49sigaction(int sig, struct sigaction *sigact, struct sigaction *osigact)
50{
51	return sigvec(sig, sigact ? &sigact->sv : NULL,
52	    osigact ? &osigact->sv : NULL);
53}
54
55int
56sigemptyset (sigset_t *mask)
57{
58	if (!mask) {
59		errno = EINVAL;
60		return -1;
61	}
62	*mask = 0;
63	return 0;
64}
65
66int
67sigprocmask (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
90int
91sigsuspend (sigset_t *mask)
92{
93	if (!mask) {
94		errno = EINVAL;
95		return -1;
96	}
97	return sigpause(*mask);
98}
99
100int
101sigdelset (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
111int
112sigaddset (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
122int
123sigismember (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