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 1.5 2005/04/26 10:41:57 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(const char *file, int line, const char *failedexpr) 44 { 45 fprintf(stderr, "assertion \"%s\" failed: file \"%s\", line %d\n", 46 failedexpr, file, line); 47 abort(); 48 /* NOTREACHED */ 49 } 50 51 enum { 52 DIAGASSERT_ABORT = 1<<0, 53 DIAGASSERT_STDERR = 1<<1, 54 DIAGASSERT_SYSLOG = 1<<2 55 }; 56 57 static int diagassert_flags = -1; 58 59 void 60 __diagassert(const char *file, int line, const char *function, 61 const char *failedexpr) 62 { 63 char buf[1024]; 64 65 if (diagassert_flags == -1) { 66 const char *p; 67 68 diagassert_flags = DIAGASSERT_SYSLOG | DIAGASSERT_ABORT; 69 70 for (p = getenv("LIBC_DIAGASSERT"); p && *p; p++) { 71 switch (*p) { 72 case 'a': 73 diagassert_flags |= DIAGASSERT_ABORT; 74 break; 75 case 'A': 76 diagassert_flags &= ~DIAGASSERT_ABORT; 77 break; 78 case 'e': 79 diagassert_flags |= DIAGASSERT_STDERR; 80 break; 81 case 'E': 82 diagassert_flags &= ~DIAGASSERT_STDERR; 83 break; 84 case 'l': 85 diagassert_flags |= DIAGASSERT_SYSLOG; 86 break; 87 case 'L': 88 diagassert_flags &= ~DIAGASSERT_SYSLOG; 89 break; 90 } 91 } 92 } 93 94 snprintf(buf, sizeof(buf), 95 "assertion \"%s\" failed: file \"%s\", line %d, function \"%s\"", 96 failedexpr, file, line, function); 97 if (diagassert_flags & DIAGASSERT_STDERR) 98 fprintf(stderr, "%s: %s\n", getprogname(), buf); 99 if (diagassert_flags & DIAGASSERT_SYSLOG) 100 syslog(LOG_DEBUG | LOG_USER, "%s", buf); 101 if (diagassert_flags & DIAGASSERT_ABORT) 102 abort(); 103 } 104