lib/libc/gen/assert.c

   1 /*      $NetBSD: assert.c,v 1.17 2012/06/25 22:32:43 abs Exp $  */
   2
   3 /*-
   4  * Copyright (c) 1992, 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[] = "@(#)assert.c    8.1 (Berkeley) 6/4/93";
  36 #else
  37 __RCSID("$NetBSD: assert.c,v 1.17 2012/06/25 22:32:43 abs Exp $");
  38 #endif
  39 #endif /* LIBC_SCCS and not lint */
  40
  41 #include "namespace.h"
  42 #include <sys/types.h>
  43
  44 #include <assert.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <syslog.h>
  48
  49 void
  50 __assert13(const char *file, int line, const char *function,
  51     const char *failedexpr)
  52 {
  53
  54         (void)fprintf(stderr,
  55             "assertion \"%s\" failed: file \"%s\", line %d%s%s%s\n",
  56             failedexpr, file, line,
  57             function ? ", function \"" : "",
  58             function ? function : "",
  59             function ? "\"" : "");
  60         abort();
  61         /* NOTREACHED */
  62 }
  63
  64 void
  65 __assert(const char *file, int line, const char *failedexpr)
  66 {
  67
  68         __assert13(file, line, NULL, failedexpr);
  69         /* NOTREACHED */
  70 }
  71
  72
  73 enum {
  74         DIAGASSERT_ABORT =      1<<0,
  75         DIAGASSERT_STDERR =     1<<1,
  76         DIAGASSERT_SYSLOG =     1<<2
  77 };
  78
  79 static int      diagassert_flags = -1;
  80
  81 void
  82 __diagassert13(const char *file, int line, const char *function,
  83     const char *failedexpr)
  84 {
  85         char buf[1024];
  86
  87         if (diagassert_flags == -1) {
  88                 char *p;
  89
  90                 diagassert_flags = DIAGASSERT_SYSLOG;
  91
  92                 for (p = getenv("LIBC_DIAGASSERT"); p && *p; p++) {
  93                         switch (*p) {
  94                         case 'a':
  95                                 diagassert_flags |= DIAGASSERT_ABORT;
  96                                 break;
  97                         case 'A':
  98                                 diagassert_flags &= ~DIAGASSERT_ABORT;
  99                                 break;
 100                         case 'e':
 101                                 diagassert_flags |= DIAGASSERT_STDERR;
 102                                 break;
 103                         case 'E':
 104                                 diagassert_flags &= ~DIAGASSERT_STDERR;
 105                                 break;
 106                         case 'l':
 107                                 diagassert_flags |= DIAGASSERT_SYSLOG;
 108                                 break;
 109                         case 'L':
 110                                 diagassert_flags &= ~DIAGASSERT_SYSLOG;
 111                                 break;
 112                         }
 113                 }
 114         }
 115
 116         snprintf(buf, sizeof(buf),
 117             "assertion \"%s\" failed: file \"%s\", line %d%s%s%s",
 118             failedexpr, file, line,
 119             function ? ", function \"" : "",
 120             function ? function : "",
 121             function ? "\"" : "");
 122         if (diagassert_flags & DIAGASSERT_STDERR)
 123                 (void)fprintf(stderr, "%s: %s\n", getprogname(), buf);
 124         if (diagassert_flags & DIAGASSERT_SYSLOG)
 125                 syslog(LOG_DEBUG | LOG_USER, "%s", buf);
 126         if (diagassert_flags & DIAGASSERT_ABORT)
 127                 abort();
 128 }
 129
 130 void
 131 __diagassert(const char *file, int line, const char *failedexpr)
 132 {
 133
 134         __diagassert13(file, line, NULL, failedexpr);
 135 }