11573Srgrimes/* 21573Srgrimes * Copyright (c) 1985, 1989, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * Redistribution and use in source and binary forms, with or without 61573Srgrimes * modification, are permitted provided that the following conditions 71573Srgrimes * are met: 81573Srgrimes * 1. Redistributions of source code must retain the above copyright 91573Srgrimes * notice, this list of conditions and the following disclaimer. 101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111573Srgrimes * notice, this list of conditions and the following disclaimer in the 121573Srgrimes * documentation and/or other materials provided with the distribution. 131573Srgrimes * 4. Neither the name of the University nor the names of its contributors 141573Srgrimes * may be used to endorse or promote products derived from this software 151573Srgrimes * without specific prior written permission. 161573Srgrimes * 171573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271573Srgrimes * SUCH DAMAGE. 281573Srgrimes */ 291573Srgrimes 301573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 311573Srgrimesstatic char sccsid[] = "@(#)signal.c 8.1 (Berkeley) 6/4/93"; 321573Srgrimes#endif /* LIBC_SCCS and not lint */ 3390039Sobrien#include <sys/cdefs.h> 3490039Sobrien__FBSDID("$FreeBSD: releng/10.2/lib/libc/gen/signal.c 287872 2015-09-16 20:59:41Z delphij $"); 351573Srgrimes 361573Srgrimes/* 371573Srgrimes * Almost backwards compatible signal. 381573Srgrimes */ 3971579Sdeischen#include "namespace.h" 401573Srgrimes#include <signal.h> 4171579Sdeischen#include "un-namespace.h" 4271579Sdeischen#include "libc_private.h" 431573Srgrimes 44252429Sjillessigset_t _sigintr __hidden; /* shared with siginterrupt */ 451573Srgrimes 461573Srgrimessig_t 47287872Sdelphijsignal(int s, sig_t a) 481573Srgrimes{ 491573Srgrimes struct sigaction sa, osa; 501573Srgrimes 511573Srgrimes sa.sa_handler = a; 521573Srgrimes sigemptyset(&sa.sa_mask); 531573Srgrimes sa.sa_flags = 0; 541573Srgrimes if (!sigismember(&_sigintr, s)) 551573Srgrimes sa.sa_flags |= SA_RESTART; 56287872Sdelphij if (__libc_sigaction(s, &sa, &osa) < 0) 571573Srgrimes return (SIG_ERR); 581573Srgrimes return (osa.sa_handler); 591573Srgrimes} 60