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assert.c revision 1.14 
      1 /*	$NetBSD: assert.c,v 1.14 2001/02/20 01:17:37 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 1.14 2001/02/20 01:17:37 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 void
     53 __assert13(file, line, function, failedexpr)
     54 	const char *file, *function, *failedexpr;
     55 	int line;
     56 {
     57 
     58 	(void)fprintf(stderr,
     59 	    "assertion \"%s\" failed: file \"%s\", line %d%s%s%s\n",
     60 	    failedexpr, file, line,
     61 	    function ? ", function \"" : "",
     62 	    function ? function : "",
     63 	    function ? "\"" : "");
     64 	abort();
     65 	/* NOTREACHED */
     66 }
     67 
     68 void
     69 __assert(file, line, failedexpr)
     70 	const char *file, *failedexpr;
     71 	int line;
     72 {
     73 
     74 	__assert13(file, line, NULL, failedexpr);
     75 	/* NOTREACHED */
     76 }
     77 
     78 
     79 enum {
     80 	DIAGASSERT_ABORT =	1<<0,
     81 	DIAGASSERT_STDERR =	1<<1,
     82 	DIAGASSERT_SYSLOG =	1<<2
     83 };
     84 
     85 static int	diagassert_flags = -1;
     86 
     87 void
     88 __diagassert13(file, line, function, failedexpr)
     89 	const char *file, *function, *failedexpr;
     90 	int line;
     91 {
     92 	char buf[1024];
     93 
     94 	if (diagassert_flags == -1) {
     95 		char *p;
     96 
     97 		diagassert_flags = DIAGASSERT_SYSLOG;
     98 
     99 		for (p = getenv("LIBC_DIAGASSERT"); p && *p; p++) {
    100 			switch (*p) {
    101 			case 'a':
    102 				diagassert_flags |= DIAGASSERT_ABORT;
    103 				break;
    104 			case 'A':
    105 				diagassert_flags &= ~DIAGASSERT_ABORT;
    106 				break;
    107 			case 'e':
    108 				diagassert_flags |= DIAGASSERT_STDERR;
    109 				break;
    110 			case 'E':
    111 				diagassert_flags &= ~DIAGASSERT_STDERR;
    112 				break;
    113 			case 'l':
    114 				diagassert_flags |= DIAGASSERT_SYSLOG;
    115 				break;
    116 			case 'L':
    117 				diagassert_flags &= ~DIAGASSERT_SYSLOG;
    118 				break;
    119 			}
    120 		}
    121 	}
    122 
    123 	snprintf(buf, sizeof(buf),
    124 	    "assertion \"%s\" failed: file \"%s\", line %d%s%s%s",
    125 	    failedexpr, file, line,
    126 	    function ? ", function \"" : "",
    127 	    function ? function : "",
    128 	    function ? "\"" : "");
    129 	if (diagassert_flags & DIAGASSERT_STDERR)
    130 		(void)fprintf(stderr, "%s: %s\n", getprogname(), buf);
    131 	if (diagassert_flags & DIAGASSERT_SYSLOG)
    132 		syslog(LOG_DEBUG | LOG_USER, "%s", buf);
    133 	if (diagassert_flags & DIAGASSERT_ABORT)
    134 		abort();
    135 }
    136 
    137 void
    138 __diagassert(file, line, failedexpr)
    139 	const char *file, *failedexpr;
    140 	int line;
    141 {
    142 
    143 	__diagassert13(file, line, NULL, failedexpr);
    144 }
    145