1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)assert.c 8.1 (Berkeley) 6/4/93 34 * $DragonFly: src/lib/libc/gen/assert.c,v 1.3 2005/01/06 17:32:44 joerg Exp $ 35 */ 36 37 #include <sys/syslog.h> 38 #include <assert.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 42 void 43 __assert(file, line, failedexpr) 44 const char *file, *failedexpr; 45 int line; 46 { 47 (void)fprintf(stderr, 48 "assertion \"%s\" failed: file \"%s\", line %d\n", 49 failedexpr, file, line); 50 abort(); 51 /* NOTREACHED */ 52 } 53 54 enum { 55 DIAGASSERT_ABORT = 1<<0, 56 DIAGASSERT_STDERR = 1<<1, 57 DIAGASSERT_SYSLOG = 1<<2 58 }; 59 60 static int diagassert_flags = -1; 61 62 void 63 __diagassert(const char *file, const char *line, const char *function, 64 int failedexpr) 65 { 66 char buf[1024]; 67 68 if (diagassert_flags == -1) { 69 const char *p; 70 71 diagassert_flags = DIAGASSERT_SYSLOG | DIAGASSERT_ABORT; 72 73 for (p = getenv("LIBC_DIAGASSERT"); p && *p; p++) { 74 switch (*p) { 75 case 'a': 76 diagassert_flags |= DIAGASSERT_ABORT; 77 break; 78 case 'A': 79 diagassert_flags &= ~DIAGASSERT_ABORT; 80 break; 81 case 'e': 82 diagassert_flags |= DIAGASSERT_STDERR; 83 break; 84 case 'E': 85 diagassert_flags &= ~DIAGASSERT_STDERR; 86 break; 87 case 'l': 88 diagassert_flags |= DIAGASSERT_SYSLOG; 89 break; 90 case 'L': 91 diagassert_flags &= ~DIAGASSERT_SYSLOG; 92 break; 93 } 94 } 95 } 96 97 snprintf(buf, sizeof(buf), 98 "assertion \"%s\" failed: file \"%s\", line %d"); 99 if (diagassert_flags & DIAGASSERT_STDERR) 100 fprintf(stderr, "%s: %s\n", getprogname(), buf); 101 if (diagassert_flags & DIAGASSERT_SYSLOG) 102 syslog(LOG_DEBUG | LOG_USER, "%s", buf); 103 if (diagassert_flags & DIAGASSERT_ABORT) 104 abort(); 105 } 106