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 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #pragma weak bsd_signal = _bsd_signal 30 31 #include "synonyms.h" 32 #include <sys/types.h> 33 #include <errno.h> 34 #include <signal.h> 35 #include <wait.h> 36 37 /* 38 * Check for valid signal number 39 */ 40 #define CHECK_SIG(s, code) \ 41 if ((s) <= 0 || (s) >= NSIG || (s) == SIGKILL || (s) == SIGSTOP) { \ 42 errno = EINVAL; \ 43 return (code); \ 44 } 45 46 void (* 47 bsd_signal(int sig, void(*func)(int)))(int) 48 { 49 struct sigaction nact; 50 struct sigaction oact; 51 52 CHECK_SIG(sig, SIG_ERR); 53 54 nact.sa_handler = func; 55 nact.sa_flags = SA_RESTART; 56 (void) sigemptyset(&nact.sa_mask); 57 (void) sigaddset(&nact.sa_mask, sig); 58 59 if (sigaction(sig, &nact, &oact) == -1) 60 return (SIG_ERR); 61 62 return (oact.sa_handler); 63 } 64