xref: /titanic_52/usr/src/lib/libbc/libc/gen/common/posix_sig.c (revision 5d54f3d8999eac1762fe0a8c7177d20f1f201fae)
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
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
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
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
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
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