1 /* $OpenBSD: err.c,v 1.2 2002/06/25 15:50:15 mickey Exp $ */ 2 3 /* 4 * log.c 5 * 6 * Based on err.c, which was adapted from OpenBSD libc *err* *warn* code. 7 * 8 * Copyright (c) 2005 Nick Mathewson <nickm (at) freehaven.net> 9 * 10 * Copyright (c) 2000 Dug Song <dugsong (at) monkey.org> 11 * 12 * Copyright (c) 1993 13 * The Regents of the University of California. All rights reserved. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #ifdef HAVE_CONFIG_H 41 #include "config.h" 42 #endif 43 44 #ifdef WIN32 45 #define WIN32_LEAN_AND_MEAN 46 #include <windows.h> 47 #undef WIN32_LEAN_AND_MEAN 48 #endif 49 #include <sys/types.h> 50 #ifdef HAVE_SYS_TIME_H 51 #include <sys/time.h> 52 #else 53 #include <sys/_libevent_time.h> 54 #endif 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <stdarg.h> 58 #include <string.h> 59 #include <errno.h> 60 #include "event.h" 61 62 #include "log.h" 63 #include "evutil.h" 64 65 static void _warn_helper(int severity, int log_errno, const char *fmt, 66 va_list ap); 67 static void event_log(int severity, const char *msg); 68 69 void 70 event_err(int eval, const char *fmt, ...) 71 { 72 va_list ap; 73 74 va_start(ap, fmt); 75 _warn_helper(_EVENT_LOG_ERR, errno, fmt, ap); 76 va_end(ap); 77 exit(eval); 78 } 79 80 void 81 event_warn(const char *fmt, ...) 82 { 83 va_list ap; 84 85 va_start(ap, fmt); 86 _warn_helper(_EVENT_LOG_WARN, errno, fmt, ap); 87 va_end(ap); 88 } 89 90 void 91 event_errx(int eval, const char *fmt, ...) 92 { 93 va_list ap; 94 95 va_start(ap, fmt); 96 _warn_helper(_EVENT_LOG_ERR, -1, fmt, ap); 97 va_end(ap); 98 exit(eval); 99 } 100 101 void 102 event_warnx(const char *fmt, ...) 103 { 104 va_list ap; 105 106 va_start(ap, fmt); 107 _warn_helper(_EVENT_LOG_WARN, -1, fmt, ap); 108 va_end(ap); 109 } 110 111 void 112 event_msgx(const char *fmt, ...) 113 { 114 va_list ap; 115 116 va_start(ap, fmt); 117 _warn_helper(_EVENT_LOG_MSG, -1, fmt, ap); 118 va_end(ap); 119 } 120 121 void 122 _event_debugx(const char *fmt, ...) 123 { 124 va_list ap; 125 126 va_start(ap, fmt); 127 _warn_helper(_EVENT_LOG_DEBUG, -1, fmt, ap); 128 va_end(ap); 129 } 130 131 static void 132 _warn_helper(int severity, int log_errno, const char *fmt, va_list ap) 133 { 134 char buf[1024]; 135 size_t len; 136 137 if (fmt != NULL) 138 evutil_vsnprintf(buf, sizeof(buf), fmt, ap); 139 else 140 buf[0] = '\0'; 141 142 if (log_errno >= 0) { 143 len = strlen(buf); 144 if (len < sizeof(buf) - 3) { 145 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", 146 strerror(log_errno)); 147 } 148 } 149 150 event_log(severity, buf); 151 } 152 153 static event_log_cb log_fn = NULL; 154 155 void 156 event_set_log_callback(event_log_cb cb) 157 { 158 log_fn = cb; 159 } 160 161 static void 162 event_log(int severity, const char *msg) 163 { 164 if (log_fn) 165 log_fn(severity, msg); 166 else { 167 const char *severity_str; 168 switch (severity) { 169 case _EVENT_LOG_DEBUG: 170 severity_str = "debug"; 171 break; 172 case _EVENT_LOG_MSG: 173 severity_str = "msg"; 174 break; 175 case _EVENT_LOG_WARN: 176 severity_str = "warn"; 177 break; 178 case _EVENT_LOG_ERR: 179 severity_str = "err"; 180 break; 181 default: 182 severity_str = "???"; 183 break; 184 } 185 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg); 186 } 187 } 188
