1 /* $NetBSD: abort.c,v 1.15 2012/06/08 11:15:26 abs 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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
34 #if 0
35 static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93";
36 #else
37 __RCSID("$NetBSD: abort.c,v 1.15 2012/06/08 11:15:26 abs Exp $");
38 #endif
39 #endif /* LIBC_SCCS and not lint */
40
41 #include "namespace.h"
42 #include <signal.h>
43 #include <stdlib.h>
44 #include <unistd.h>
45
46 #if !defined(__minix) || !defined(_LIBMINC)
47 extern void (*__cleanup)(void);
48 static int aborting = 0;
49
50 void
abort(void)51 abort(void)
52 {
53 sigset_t mask;
54
55 sigfillset(&mask);
56 /*
57 * don't block SIGABRT to give any handler a chance; we ignore
58 * any errors -- X311J doesn't allow abort to return anyway.
59 */
60 sigdelset(&mask, SIGABRT);
61 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
62
63 /*
64 * POSIX.1 requires that stdio buffers be flushed on abort.
65 * We ensure the cleanup routines are only called once in
66 * case the user calls abort() in a SIGABRT handler.
67 */
68 if (!aborting) {
69 aborting = 1;
70
71 if (__cleanup)
72 (*__cleanup)();
73 }
74
75 (void)raise(SIGABRT);
76
77 /*
78 * if SIGABRT ignored, or caught and the handler returns, do
79 * it again, only harder.
80 */
81 (void)signal(SIGABRT, SIG_DFL);
82 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
83 (void)raise(SIGABRT);
84 _exit(1);
85 }
86
87 #else /* defined(__minix) && defined(_LIBMINC) */
88 void
abort(void)89 abort(void)
90 {
91
92 /* We cannot use signals from system services. */
93 exit(1);
94 }
95 #endif /* defined(__minix) && defined(_LIBMINC) */
96