Merge from vendor branch BZIP:
[dragonfly.git] / lib / libc / gen / assert.c
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1/*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)assert.c 8.1 (Berkeley) 6/4/93
5159ff2c 34 * $DragonFly: src/lib/libc/gen/assert.c,v 1.5 2005/04/26 10:41:57 joerg Exp $
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35 */
36
8eccd05f 37#include <sys/syslog.h>
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38#include <assert.h>
39#include <stdio.h>
40#include <stdlib.h>
41
42void
5ffb8fbb 43__assert(const char *file, int line, const char *failedexpr)
984263bc 44{
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45 fprintf(stderr, "assertion \"%s\" failed: file \"%s\", line %d\n",
46 failedexpr, file, line);
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47 abort();
48 /* NOTREACHED */
49}
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50
51enum {
52 DIAGASSERT_ABORT = 1<<0,
53 DIAGASSERT_STDERR = 1<<1,
54 DIAGASSERT_SYSLOG = 1<<2
55};
56
57static int diagassert_flags = -1;
58
59void
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60__diagassert(const char *file, int line, const char *function,
61 const char *failedexpr)
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62{
63 char buf[1024];
64
65 if (diagassert_flags == -1) {
66 const char *p;
67
68 diagassert_flags = DIAGASSERT_SYSLOG | DIAGASSERT_ABORT;
69
70 for (p = getenv("LIBC_DIAGASSERT"); p && *p; p++) {
71 switch (*p) {
72 case 'a':
73 diagassert_flags |= DIAGASSERT_ABORT;
74 break;
75 case 'A':
76 diagassert_flags &= ~DIAGASSERT_ABORT;
77 break;
78 case 'e':
79 diagassert_flags |= DIAGASSERT_STDERR;
80 break;
81 case 'E':
82 diagassert_flags &= ~DIAGASSERT_STDERR;
83 break;
84 case 'l':
85 diagassert_flags |= DIAGASSERT_SYSLOG;
86 break;
87 case 'L':
88 diagassert_flags &= ~DIAGASSERT_SYSLOG;
89 break;
90 }
91 }
92 }
93
94 snprintf(buf, sizeof(buf),
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95 "assertion \"%s\" failed: file \"%s\", line %d, function \"%s\"",
96 failedexpr, file, line, function);
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97 if (diagassert_flags & DIAGASSERT_STDERR)
98 fprintf(stderr, "%s: %s\n", getprogname(), buf);
99 if (diagassert_flags & DIAGASSERT_SYSLOG)
100 syslog(LOG_DEBUG | LOG_USER, "%s", buf);
101 if (diagassert_flags & DIAGASSERT_ABORT)
102 abort();
103}