1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright (c) 2000 by Sun Microsystems, Inc.
24*7c478bd9Sstevel@tonic-gate  * All rights reserved.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*7c478bd9Sstevel@tonic-gate #include <signal.h>
29*7c478bd9Sstevel@tonic-gate #include <thread.h>
30*7c478bd9Sstevel@tonic-gate #include <unistd.h>
31*7c478bd9Sstevel@tonic-gate #include <errno.h>
32*7c478bd9Sstevel@tonic-gate 
33*7c478bd9Sstevel@tonic-gate #include "sysevent_signal.h"
34*7c478bd9Sstevel@tonic-gate 
35*7c478bd9Sstevel@tonic-gate static se_signal_f *sig_handlers[NSIG];
36*7c478bd9Sstevel@tonic-gate static void *sig_data[NSIG];
37*7c478bd9Sstevel@tonic-gate 
38*7c478bd9Sstevel@tonic-gate static void
sig_stub(int sig,siginfo_t * sip,void * ucp)39*7c478bd9Sstevel@tonic-gate sig_stub(int sig, siginfo_t *sip, void *ucp)
40*7c478bd9Sstevel@tonic-gate {
41*7c478bd9Sstevel@tonic-gate 	sig_handlers[sig](sig, sip, (ucontext_t *)ucp, sig_data[sig]);
42*7c478bd9Sstevel@tonic-gate }
43*7c478bd9Sstevel@tonic-gate 
44*7c478bd9Sstevel@tonic-gate int
se_signal_sethandler(int sig,se_signal_f * handler,void * data)45*7c478bd9Sstevel@tonic-gate se_signal_sethandler(int sig, se_signal_f *handler, void *data)
46*7c478bd9Sstevel@tonic-gate {
47*7c478bd9Sstevel@tonic-gate 	struct sigaction act;
48*7c478bd9Sstevel@tonic-gate 	int status;
49*7c478bd9Sstevel@tonic-gate 
50*7c478bd9Sstevel@tonic-gate 	sig_handlers[sig] = handler;
51*7c478bd9Sstevel@tonic-gate 	sig_data[sig] = data;
52*7c478bd9Sstevel@tonic-gate 
53*7c478bd9Sstevel@tonic-gate 	if (handler == SIG_DFL || handler == SIG_IGN) {
54*7c478bd9Sstevel@tonic-gate 		act.sa_handler = handler;
55*7c478bd9Sstevel@tonic-gate 		act.sa_flags = SA_RESTART;
56*7c478bd9Sstevel@tonic-gate 	} else {
57*7c478bd9Sstevel@tonic-gate 		act.sa_sigaction = sig_stub;
58*7c478bd9Sstevel@tonic-gate 		act.sa_flags = SA_SIGINFO | SA_RESTART;
59*7c478bd9Sstevel@tonic-gate 	}
60*7c478bd9Sstevel@tonic-gate 
61*7c478bd9Sstevel@tonic-gate 	(void) sigfillset(&act.sa_mask);
62*7c478bd9Sstevel@tonic-gate 
63*7c478bd9Sstevel@tonic-gate 	if ((status = sigaction(sig, &act, NULL)) == 0)
64*7c478bd9Sstevel@tonic-gate 		(void) se_signal_unblock(sig);
65*7c478bd9Sstevel@tonic-gate 
66*7c478bd9Sstevel@tonic-gate 	return (status);
67*7c478bd9Sstevel@tonic-gate }
68*7c478bd9Sstevel@tonic-gate 
69*7c478bd9Sstevel@tonic-gate int
se_signal_unblock(int sig)70*7c478bd9Sstevel@tonic-gate se_signal_unblock(int sig)
71*7c478bd9Sstevel@tonic-gate {
72*7c478bd9Sstevel@tonic-gate 	sigset_t set;
73*7c478bd9Sstevel@tonic-gate 
74*7c478bd9Sstevel@tonic-gate 	(void) sigemptyset(&set);
75*7c478bd9Sstevel@tonic-gate 	(void) sigaddset(&set, sig);
76*7c478bd9Sstevel@tonic-gate 
77*7c478bd9Sstevel@tonic-gate 	return (thr_sigsetmask(SIG_UNBLOCK, &set, NULL));
78*7c478bd9Sstevel@tonic-gate }
79*7c478bd9Sstevel@tonic-gate 
80*7c478bd9Sstevel@tonic-gate int
se_signal_blockall(void)81*7c478bd9Sstevel@tonic-gate se_signal_blockall(void)
82*7c478bd9Sstevel@tonic-gate {
83*7c478bd9Sstevel@tonic-gate 	sigset_t set;
84*7c478bd9Sstevel@tonic-gate 
85*7c478bd9Sstevel@tonic-gate 	(void) sigfillset(&set);
86*7c478bd9Sstevel@tonic-gate 	return (thr_sigsetmask(SIG_BLOCK, &set, NULL));
87*7c478bd9Sstevel@tonic-gate }
88*7c478bd9Sstevel@tonic-gate 
89*7c478bd9Sstevel@tonic-gate int
se_signal_unblockall(void)90*7c478bd9Sstevel@tonic-gate se_signal_unblockall(void)
91*7c478bd9Sstevel@tonic-gate {
92*7c478bd9Sstevel@tonic-gate 	sigset_t set;
93*7c478bd9Sstevel@tonic-gate 
94*7c478bd9Sstevel@tonic-gate 	(void) sigfillset(&set);
95*7c478bd9Sstevel@tonic-gate 	return (thr_sigsetmask(SIG_UNBLOCK, &set, NULL));
96*7c478bd9Sstevel@tonic-gate }
97