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assert.c revision 1.13 
      1 /*	$NetBSD: assert.c,v 1.13 2001/02/19 22:22:16 cgd 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #if defined(LIBC_SCCS) && !defined(lint)
     38 #if 0
     39 static char sccsid[] = "@(#)assert.c	8.1 (Berkeley) 6/4/93";
     40 #else
     41 __RCSID("$NetBSD: assert.c,v 1.13 2001/02/19 22:22:16 cgd Exp $");
     42 #endif
     43 #endif /* LIBC_SCCS and not lint */
     44 
     45 #include <sys/types.h>
     46 
     47 #include <assert.h>
     48 #include <stdio.h>
     49 #include <stdlib.h>
     50 #include <syslog.h>
     51 
     52 #include "namespace.h"
     53 
     54 void
     55 __assert13(file, line, function, failedexpr)
     56 	const char *file, *function, *failedexpr;
     57 	int line;
     58 {
     59 
     60 	(void)fprintf(stderr,
     61 	    "assertion \"%s\" failed: file \"%s\", line %d%s%s%s\n",
     62 	    failedexpr, file, line,
     63 	    function ? ", function \"" : "",
     64 	    function ? function : "",
     65 	    function ? "\"" : "");
     66 	abort();
     67 	/* NOTREACHED */
     68 }
     69 
     70 void
     71 __assert(file, line, failedexpr)
     72 	const char *file, *failedexpr;
     73 	int line;
     74 {
     75 
     76 	__assert13(file, line, NULL, failedexpr);
     77 	/* NOTREACHED */
     78 }
     79 
     80 
     81 enum {
     82 	DIAGASSERT_ABORT =	1<<0,
     83 	DIAGASSERT_STDERR =	1<<1,
     84 	DIAGASSERT_SYSLOG =	1<<2
     85 };
     86 
     87 static int	diagassert_flags = -1;
     88 
     89 void
     90 __diagassert13(file, line, function, failedexpr)
     91 	const char *file, *function, *failedexpr;
     92 	int line;
     93 {
     94 	char buf[1024];
     95 
     96 	if (diagassert_flags == -1) {
     97 		char *p;
     98 
     99 		diagassert_flags = DIAGASSERT_SYSLOG;
    100 
    101 		for (p = getenv("LIBC_DIAGASSERT"); p && *p; p++) {
    102 			switch (*p) {
    103 			case 'a':
    104 				diagassert_flags |= DIAGASSERT_ABORT;
    105 				break;
    106 			case 'A':
    107 				diagassert_flags &= ~DIAGASSERT_ABORT;
    108 				break;
    109 			case 'e':
    110 				diagassert_flags |= DIAGASSERT_STDERR;
    111 				break;
    112 			case 'E':
    113 				diagassert_flags &= ~DIAGASSERT_STDERR;
    114 				break;
    115 			case 'l':
    116 				diagassert_flags |= DIAGASSERT_SYSLOG;
    117 				break;
    118 			case 'L':
    119 				diagassert_flags &= ~DIAGASSERT_SYSLOG;
    120 				break;
    121 			}
    122 		}
    123 	}
    124 
    125 	snprintf(buf, sizeof(buf),
    126 	    "assertion \"%s\" failed: file \"%s\", line %d%s%s%s",
    127 	    failedexpr, file, line,
    128 	    function ? ", function \"" : "",
    129 	    function ? function : "",
    130 	    function ? "\"" : "");
    131 	if (diagassert_flags & DIAGASSERT_STDERR)
    132 		(void)fprintf(stderr, "%s: %s\n", getprogname(), buf);
    133 	if (diagassert_flags & DIAGASSERT_SYSLOG)
    134 		syslog(LOG_DEBUG | LOG_USER, "%s", buf);
    135 	if (diagassert_flags & DIAGASSERT_ABORT)
    136 		abort();
    137 }
    138 
    139 void
    140 __diagassert(file, line, failedexpr)
    141 	const char *file, *failedexpr;
    142 	int line;
    143 {
    144 
    145 	__diagassert13(file, line, NULL, failedexpr);
    146 }
    147