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