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 (c) 2000 by Sun Microsystems, Inc.
24  * All rights reserved.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 #include <signal.h>
29 #include <thread.h>
30 #include <unistd.h>
31 #include <errno.h>
32 
33 #include "sysevent_signal.h"
34 
35 static se_signal_f *sig_handlers[NSIG];
36 static void *sig_data[NSIG];
37 
38 static void
sig_stub(int sig,siginfo_t * sip,void * ucp)39 sig_stub(int sig, siginfo_t *sip, void *ucp)
40 {
41 	sig_handlers[sig](sig, sip, (ucontext_t *)ucp, sig_data[sig]);
42 }
43 
44 int
se_signal_sethandler(int sig,se_signal_f * handler,void * data)45 se_signal_sethandler(int sig, se_signal_f *handler, void *data)
46 {
47 	struct sigaction act;
48 	int status;
49 
50 	sig_handlers[sig] = handler;
51 	sig_data[sig] = data;
52 
53 	if (handler == SIG_DFL || handler == SIG_IGN) {
54 		act.sa_handler = handler;
55 		act.sa_flags = SA_RESTART;
56 	} else {
57 		act.sa_sigaction = sig_stub;
58 		act.sa_flags = SA_SIGINFO | SA_RESTART;
59 	}
60 
61 	(void) sigfillset(&act.sa_mask);
62 
63 	if ((status = sigaction(sig, &act, NULL)) == 0)
64 		(void) se_signal_unblock(sig);
65 
66 	return (status);
67 }
68 
69 int
se_signal_unblock(int sig)70 se_signal_unblock(int sig)
71 {
72 	sigset_t set;
73 
74 	(void) sigemptyset(&set);
75 	(void) sigaddset(&set, sig);
76 
77 	return (thr_sigsetmask(SIG_UNBLOCK, &set, NULL));
78 }
79 
80 int
se_signal_blockall(void)81 se_signal_blockall(void)
82 {
83 	sigset_t set;
84 
85 	(void) sigfillset(&set);
86 	return (thr_sigsetmask(SIG_BLOCK, &set, NULL));
87 }
88 
89 int
se_signal_unblockall(void)90 se_signal_unblockall(void)
91 {
92 	sigset_t set;
93 
94 	(void) sigfillset(&set);
95 	return (thr_sigsetmask(SIG_UNBLOCK, &set, NULL));
96 }
97