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assert.c revision 1.16 
      1 /*	$NetBSD: assert.c,v 1.16 2005/02/09 21:35:46 kleink 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 1.16 2005/02/09 21:35:46 kleink 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 }
    142