1 /* $NetBSD: abort.c,v 1.11 1998/10/12 15:56:16 kleink Exp $ */ 2 3 /* 4 * Copyright (c) 1985, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: abort.c,v 1.11 1998/10/12 15:56:16 kleink Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 #include <signal.h> 47 #include <stdlib.h> 48 #include <unistd.h> 49 50 extern void (*__cleanup) __P((void)); 51 static int aborting = 0; 52 53 void 54 abort() 55 { 56 sigset_t mask; 57 58 sigfillset(&mask); 59 /* 60 * don't block SIGABRT to give any handler a chance; we ignore 61 * any errors -- X311J doesn't allow abort to return anyway. 62 */ 63 sigdelset(&mask, SIGABRT); 64 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL); 65 66 /* 67 * POSIX.1 requires that stdio buffers be flushed on abort. 68 * We ensure the cleanup routines are only called once in 69 * case the user calls abort() in a SIGABRT handler. 70 */ 71 if (!aborting) { 72 aborting = 1; 73 74 if (__cleanup) 75 (*__cleanup)(); 76 } 77 78 (void)kill(getpid(), SIGABRT); 79 80 /* 81 * if SIGABRT ignored, or caught and the handler returns, do 82 * it again, only harder. 83 */ 84 (void)signal(SIGABRT, SIG_DFL); 85 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL); 86 (void)kill(getpid(), SIGABRT); 87 _exit(1); 88 } 89