158f0484fSRodney W. Grimes /* 258f0484fSRodney W. Grimes * Copyright (c) 1985, 1989, 1993 358f0484fSRodney W. Grimes * The Regents of the University of California. All rights reserved. 458f0484fSRodney W. Grimes * 558f0484fSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 658f0484fSRodney W. Grimes * modification, are permitted provided that the following conditions 758f0484fSRodney W. Grimes * are met: 858f0484fSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 958f0484fSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 1058f0484fSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 1158f0484fSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 1258f0484fSRodney W. Grimes * documentation and/or other materials provided with the distribution. 13*fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 1458f0484fSRodney W. Grimes * may be used to endorse or promote products derived from this software 1558f0484fSRodney W. Grimes * without specific prior written permission. 1658f0484fSRodney W. Grimes * 1758f0484fSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1858f0484fSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1958f0484fSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2058f0484fSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2158f0484fSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2258f0484fSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2358f0484fSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2458f0484fSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2558f0484fSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2658f0484fSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2758f0484fSRodney W. Grimes * SUCH DAMAGE. 2858f0484fSRodney W. Grimes */ 2958f0484fSRodney W. Grimes 3058f0484fSRodney W. Grimes #if defined(LIBC_SCCS) && !defined(lint) 3158f0484fSRodney W. Grimes static char sccsid[] = "@(#)signal.c 8.1 (Berkeley) 6/4/93"; 3258f0484fSRodney W. Grimes #endif /* LIBC_SCCS and not lint */ 33ea8d448aSDavid E. O'Brien #include <sys/cdefs.h> 34ea8d448aSDavid E. O'Brien __FBSDID("$FreeBSD$"); 3558f0484fSRodney W. Grimes 3658f0484fSRodney W. Grimes /* 3758f0484fSRodney W. Grimes * Almost backwards compatible signal. 3858f0484fSRodney W. Grimes */ 39d201fe46SDaniel Eischen #include "namespace.h" 4058f0484fSRodney W. Grimes #include <signal.h> 41d201fe46SDaniel Eischen #include "un-namespace.h" 42d201fe46SDaniel Eischen #include "libc_private.h" 4358f0484fSRodney W. Grimes 4461c2a618SJilles Tjoelker sigset_t _sigintr __hidden; /* shared with siginterrupt */ 4558f0484fSRodney W. Grimes 4658f0484fSRodney W. Grimes sig_t 47bd6060a1SKonstantin Belousov signal(int s, sig_t a) 4858f0484fSRodney W. Grimes { 4958f0484fSRodney W. Grimes struct sigaction sa, osa; 5058f0484fSRodney W. Grimes 5158f0484fSRodney W. Grimes sa.sa_handler = a; 5258f0484fSRodney W. Grimes sigemptyset(&sa.sa_mask); 5358f0484fSRodney W. Grimes sa.sa_flags = 0; 5458f0484fSRodney W. Grimes if (!sigismember(&_sigintr, s)) 5558f0484fSRodney W. Grimes sa.sa_flags |= SA_RESTART; 56bd6060a1SKonstantin Belousov if (__libc_sigaction(s, &sa, &osa) < 0) 5758f0484fSRodney W. Grimes return (SIG_ERR); 5858f0484fSRodney W. Grimes return (osa.sa_handler); 5958f0484fSRodney W. Grimes } 60