IABSD.fr/src/lib/libc/stdlib/abort.c

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• Author : guenther
  Date : 2017-08-12 22:59:52
  Hash : 0f9363ec
  Message : Minimize #includes, particularly to avoid thread_private.h ok tedu@

• lib/libc/stdlib/abort.c

• /*	$OpenBSD: abort.c,v 1.21 2017/08/12 22:59:52 guenther Exp $ */
  /*
   * Copyright (c) 1985 Regents of the University of California.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #include <signal.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  
  
  void
  abort(void)
  {
  	sigset_t mask;
  	struct sigaction sa;
  
  	sigfillset(&mask);
  	/*
  	 * don't block SIGABRT to give any handler a chance; we ignore
  	 * any errors -- X311J doesn't allow abort to return anyway.
  	 */
  	sigdelset(&mask, SIGABRT);
  	(void)sigprocmask(SIG_SETMASK, &mask, NULL);
  
  	(void)raise(SIGABRT);
  
  	/*
  	 * if SIGABRT ignored, or caught and the handler returns, do
  	 * it again, only harder.
  	 */
  	memset(&sa, 0, sizeof(sa));
  	sa.sa_handler = SIG_DFL;
  	(void)sigaction(SIGABRT, &sa, NULL);
  	(void)sigprocmask(SIG_SETMASK, &mask, NULL);
  	(void)raise(SIGABRT);
  	_exit(1);
  }
  DEF_STRONG(abort);