1 /* $NetBSD: abort.c,v 1.8 1997/05/19 02:18:14 kleink Exp $ */ 2 3 /* 4 * Copyright (c) 1985 Regents of the University of California. 5 * 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 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char *sccsid = "from: @(#)abort.c 5.11 (Berkeley) 2/23/91"; 39 #else 40 static char *rcsid = "$NetBSD: abort.c,v 1.8 1997/05/19 02:18:14 kleink Exp $"; 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include <signal.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 48 void (*__cleanup)(); 49 static int aborting = 0; 50 51 void 52 abort() 53 { 54 sigset_t mask; 55 56 sigfillset(&mask); 57 /* 58 * don't block SIGABRT to give any handler a chance; we ignore 59 * any errors -- X311J doesn't allow abort to return anyway. 60 */ 61 sigdelset(&mask, SIGABRT); 62 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL); 63 64 /* 65 * POSIX.1 requires that stdio buffers be flushed on abort. 66 * We ensure the cleanup routines are only called once in 67 * case the user calls abort() in a SIGABRT handler. 68 */ 69 if (!aborting) { 70 aborting = 1; 71 72 if (__cleanup) 73 (*__cleanup)(); 74 } 75 76 (void)kill(getpid(), SIGABRT); 77 78 /* 79 * if SIGABRT ignored, or caught and the handler returns, do 80 * it again, only harder. 81 */ 82 (void)signal(SIGABRT, SIG_DFL); 83 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL); 84 (void)kill(getpid(), SIGABRT); 85 exit(1); 86 } 87