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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma weak _bsd_signal = bsd_signal
28
29 #include "lint.h"
30 #include <sys/types.h>
31 #include <errno.h>
32 #include <signal.h>
33 #include <wait.h>
34
35 /*
36 * Check for valid signal number
37 */
38 #define CHECK_SIG(s, code) \
39 if ((s) <= 0 || (s) >= NSIG || (s) == SIGKILL || (s) == SIGSTOP) { \
40 errno = EINVAL; \
41 return (code); \
42 }
43
44 void (*
bsd_signal(int sig,void (* func)(int))45 bsd_signal(int sig, void(*func)(int)))(int)
46 {
47 struct sigaction nact;
48 struct sigaction oact;
49
50 CHECK_SIG(sig, SIG_ERR);
51
52 nact.sa_handler = func;
53 nact.sa_flags = SA_RESTART;
54 (void) sigemptyset(&nact.sa_mask);
55 (void) sigaddset(&nact.sa_mask, sig);
56
57 if (sigaction(sig, &nact, &oact) == -1)
58 return (SIG_ERR);
59
60 return (oact.sa_handler);
61 }
62