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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma weak _bsd_signal = bsd_signal 28 29 #include "lint.h" 30 #include <sys/types.h> 31 #include <errno.h> 32 #include <signal.h> 33 #include <wait.h> 34 35 /* 36 * Check for valid signal number 37 */ 38 #define CHECK_SIG(s, code) \ 39 if ((s) <= 0 || (s) >= NSIG || (s) == SIGKILL || (s) == SIGSTOP) { \ 40 errno = EINVAL; \ 41 return (code); \ 42 } 43 44 void (* 45 bsd_signal(int sig, void(*func)(int)))(int) 46 { 47 struct sigaction nact; 48 struct sigaction oact; 49 50 CHECK_SIG(sig, SIG_ERR); 51 52 nact.sa_handler = func; 53 nact.sa_flags = SA_RESTART; 54 (void) sigemptyset(&nact.sa_mask); 55 (void) sigaddset(&nact.sa_mask, sig); 56 57 if (sigaction(sig, &nact, &oact) == -1) 58 return (SIG_ERR); 59 60 return (oact.sa_handler); 61 } 62