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assert.c revision 1.15 
      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 <sys/types.h>
     42 
     43 #include <assert.h>
     44 #include <stdio.h>
     45 #include <stdlib.h>
     46 #include <syslog.h>
     47 
     48 void
     49 __assert13(file, line, function, failedexpr)
     50 	const char *file, *function, *failedexpr;
     51 	int line;
     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(file, line, failedexpr)
     66 	const char *file, *failedexpr;
     67 	int line;
     68 {
     69 
     70 	__assert13(file, line, NULL, failedexpr);
     71 	/* NOTREACHED */
     72 }
     73 
     74 
     75 enum {
     76 	DIAGASSERT_ABORT =	1<<0,
     77 	DIAGASSERT_STDERR =	1<<1,
     78 	DIAGASSERT_SYSLOG =	1<<2
     79 };
     80 
     81 static int	diagassert_flags = -1;
     82 
     83 void
     84 __diagassert13(file, line, function, failedexpr)
     85 	const char *file, *function, *failedexpr;
     86 	int line;
     87 {
     88 	char buf[1024];
     89 
     90 	if (diagassert_flags == -1) {
     91 		char *p;
     92 
     93 		diagassert_flags = DIAGASSERT_SYSLOG;
     94 
     95 		for (p = getenv("LIBC_DIAGASSERT"); p && *p; p++) {
     96 			switch (*p) {
     97 			case 'a':
     98 				diagassert_flags |= DIAGASSERT_ABORT;
     99 				break;
    100 			case 'A':
    101 				diagassert_flags &= ~DIAGASSERT_ABORT;
    102 				break;
    103 			case 'e':
    104 				diagassert_flags |= DIAGASSERT_STDERR;
    105 				break;
    106 			case 'E':
    107 				diagassert_flags &= ~DIAGASSERT_STDERR;
    108 				break;
    109 			case 'l':
    110 				diagassert_flags |= DIAGASSERT_SYSLOG;
    111 				break;
    112 			case 'L':
    113 				diagassert_flags &= ~DIAGASSERT_SYSLOG;
    114 				break;
    115 			}
    116 		}
    117 	}
    118 
    119 	snprintf(buf, sizeof(buf),
    120 	    "assertion \"%s\" failed: file \"%s\", line %d%s%s%s",
    121 	    failedexpr, file, line,
    122 	    function ? ", function \"" : "",
    123 	    function ? function : "",
    124 	    function ? "\"" : "");
    125 	if (diagassert_flags & DIAGASSERT_STDERR)
    126 		(void)fprintf(stderr, "%s: %s\n", getprogname(), buf);
    127 	if (diagassert_flags & DIAGASSERT_SYSLOG)
    128 		syslog(LOG_DEBUG | LOG_USER, "%s", buf);
    129 	if (diagassert_flags & DIAGASSERT_ABORT)
    130 		abort();
    131 }
    132 
    133 void
    134 __diagassert(file, line, failedexpr)
    135 	const char *file, *failedexpr;
    136 	int line;
    137 {
    138 
    139 	__diagassert13(file, line, NULL, failedexpr);
    140 }
    141