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 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 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 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 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 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