lib/libc/gen/assert.c

   1 /*      $NetBSD: assert.c,v 1.15 2003/08/07 16:42:46 agc 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 1.15 2003/08/07 16:42:46 agc 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(file, line, function, failedexpr)
  51         const char *file, *function, *failedexpr;
  52         int line;
  53 {
  54
  55         (void)fprintf(stderr,
  56             "assertion \"%s\" failed: file \"%s\", line %d%s%s%s\n",
  57             failedexpr, file, line,
  58             function ? ", function \"" : "",
  59             function ? function : "",
  60             function ? "\"" : "");
  61         abort();
  62         /* NOTREACHED */
  63 }
  64
  65 void
  66 __assert(file, line, failedexpr)
  67         const char *file, *failedexpr;
  68         int line;
  69 {
  70
  71         __assert13(file, line, NULL, failedexpr);
  72         /* NOTREACHED */
  73 }
  74
  75
  76 enum {
  77         DIAGASSERT_ABORT =      1<<0,
  78         DIAGASSERT_STDERR =     1<<1,
  79         DIAGASSERT_SYSLOG =     1<<2
  80 };
  81
  82 static int      diagassert_flags = -1;
  83
  84 void
  85 __diagassert13(file, line, function, failedexpr)
  86         const char *file, *function, *failedexpr;
  87         int line;
  88 {
  89         char buf[1024];
  90
  91         if (diagassert_flags == -1) {
  92                 char *p;
  93
  94                 diagassert_flags = DIAGASSERT_SYSLOG;
  95
  96                 for (p = getenv("LIBC_DIAGASSERT"); p && *p; p++) {
  97                         switch (*p) {
  98                         case 'a':
  99                                 diagassert_flags |= DIAGASSERT_ABORT;
 100                                 break;
 101                         case 'A':
 102                                 diagassert_flags &= ~DIAGASSERT_ABORT;
 103                                 break;
 104                         case 'e':
 105                                 diagassert_flags |= DIAGASSERT_STDERR;
 106                                 break;
 107                         case 'E':
 108                                 diagassert_flags &= ~DIAGASSERT_STDERR;
 109                                 break;
 110                         case 'l':
 111                                 diagassert_flags |= DIAGASSERT_SYSLOG;
 112                                 break;
 113                         case 'L':
 114                                 diagassert_flags &= ~DIAGASSERT_SYSLOG;
 115                                 break;
 116                         }
 117                 }
 118         }
 119
 120         snprintf(buf, sizeof(buf),
 121             "assertion \"%s\" failed: file \"%s\", line %d%s%s%s",
 122             failedexpr, file, line,
 123             function ? ", function \"" : "",
 124             function ? function : "",
 125             function ? "\"" : "");
 126         if (diagassert_flags & DIAGASSERT_STDERR)
 127                 (void)fprintf(stderr, "%s: %s\n", getprogname(), buf);
 128         if (diagassert_flags & DIAGASSERT_SYSLOG)
 129                 syslog(LOG_DEBUG | LOG_USER, "%s", buf);
 130         if (diagassert_flags & DIAGASSERT_ABORT)
 131                 abort();
 132 }
 133
 134 void
 135 __diagassert(file, line, failedexpr)
 136         const char *file, *failedexpr;
 137         int line;
 138 {
 139
 140         __diagassert13(file, line, NULL, failedexpr);
 141 }