1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1994 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /*
30 * posix signal package
31 */
32 #include <stdio.h>
33 #include <signal.h>
34 #include <errno.h>
35
36 #define cantmask (sigmask(SIGKILL)|sigmask(SIGSTOP))
37
38
39 /*
40 * sigemptyset - all known signals
41 */
42 int
sigemptyset(sigset_t * sigp)43 sigemptyset(sigset_t *sigp)
44 {
45 if (!sigp) {
46 errno = EINVAL;
47 return (-1);
48 }
49 *sigp = 0;
50 return (0);
51 }
52
53 /*
54 * sigfillset - all known signals
55 */
56 int
sigfillset(sigset_t * sigp)57 sigfillset(sigset_t *sigp)
58 {
59 if (!sigp) {
60 errno = EINVAL;
61 return (-1);
62 }
63 *sigp = sigmask(NSIG - 1) | (sigmask(NSIG - 1) - 1);
64 return (0);
65 }
66
67 /*
68 * add the signal to the set
69 */
70 int
sigaddset(sigset_t * sigp,int signo)71 sigaddset(sigset_t *sigp, int signo)
72 {
73 if (!sigp || signo <= 0 || signo >= NSIG) {
74 errno = EINVAL;
75 return (-1);
76 }
77 *sigp |= sigmask(signo);
78 return (0);
79 }
80
81 /*
82 * remove the signal from the set
83 */
84 int
sigdelset(sigset_t * sigp,int signo)85 sigdelset(sigset_t *sigp, int signo)
86 {
87 if (!sigp || signo <= 0 || signo >= NSIG) {
88 errno = EINVAL;
89 return (-1);
90 }
91 *sigp &= ~sigmask(signo);
92 return (0);
93 }
94
95 /*
96 * return true if the signal is in the set (return is 0 or 1)
97 */
98 int
sigismember(sigset_t * sigp,int signo)99 sigismember(sigset_t *sigp, int signo)
100 {
101 if (!sigp || signo <= 0 || signo >= NSIG) {
102 errno = EINVAL;
103 return (-1);
104 }
105 return ((*sigp & sigmask(signo)) != 0);
106 }
107