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) 2005-2012 Niels Provos and Nick Mathewson 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 #include "event2/event-config.h" 41 42 #ifdef WIN32 43 #include <winsock2.h> 44 #define WIN32_LEAN_AND_MEAN 45 #include <windows.h> 46 #undef WIN32_LEAN_AND_MEAN 47 #endif 48 #include <sys/types.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <stdarg.h> 52 #include <string.h> 53 #include <errno.h> 54 #include "event2/event.h" 55 #include "event2/util.h" 56 57 #include "log-internal.h" 58 59 static void _warn_helper(int severity, const char *errstr, const char *fmt, 60 va_list ap); 61 static void event_log(int severity, const char *msg); 62 static void event_exit(int errcode) EV_NORETURN; 63 64 static event_fatal_cb fatal_fn = NULL; 65 66 void 67 event_set_fatal_callback(event_fatal_cb cb) 68 { 69 fatal_fn = cb; 70 } 71 72 static void 73 event_exit(int errcode) 74 { 75 if (fatal_fn) { 76 fatal_fn(errcode); 77 exit(errcode); /* should never be reached */ 78 } else if (errcode == _EVENT_ERR_ABORT) 79 abort(); 80 else 81 exit(errcode); 82 } 83 84 void 85 event_err(int eval, const char *fmt, ...) 86 { 87 va_list ap; 88 89 va_start(ap, fmt); 90 _warn_helper(_EVENT_LOG_ERR, strerror(errno), fmt, ap); 91 va_end(ap); 92 event_exit(eval); 93 } 94 95 void 96 event_warn(const char *fmt, ...) 97 { 98 va_list ap; 99 100 va_start(ap, fmt); 101 _warn_helper(_EVENT_LOG_WARN, strerror(errno), fmt, ap); 102 va_end(ap); 103 } 104 105 void 106 event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...) 107 { 108 va_list ap; 109 int err = evutil_socket_geterror(sock); 110 111 va_start(ap, fmt); 112 _warn_helper(_EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap); 113 va_end(ap); 114 event_exit(eval); 115 } 116 117 void 118 event_sock_warn(evutil_socket_t sock, const char *fmt, ...) 119 { 120 va_list ap; 121 int err = evutil_socket_geterror(sock); 122 123 va_start(ap, fmt); 124 _warn_helper(_EVENT_LOG_WARN, evutil_socket_error_to_string(err), fmt, ap); 125 va_end(ap); 126 } 127 128 void 129 event_errx(int eval, const char *fmt, ...) 130 { 131 va_list ap; 132 133 va_start(ap, fmt); 134 _warn_helper(_EVENT_LOG_ERR, NULL, fmt, ap); 135 va_end(ap); 136 event_exit(eval); 137 } 138 139 void 140 event_warnx(const char *fmt, ...) 141 { 142 va_list ap; 143 144 va_start(ap, fmt); 145 _warn_helper(_EVENT_LOG_WARN, NULL, fmt, ap); 146 va_end(ap); 147 } 148 149 void 150 event_msgx(const char *fmt, ...) 151 { 152 va_list ap; 153 154 va_start(ap, fmt); 155 _warn_helper(_EVENT_LOG_MSG, NULL, fmt, ap); 156 va_end(ap); 157 } 158 159 void 160 _event_debugx(const char *fmt, ...) 161 { 162 va_list ap; 163 164 va_start(ap, fmt); 165 _warn_helper(_EVENT_LOG_DEBUG, NULL, fmt, ap); 166 va_end(ap); 167 } 168 169 static void 170 _warn_helper(int severity, const char *errstr, const char *fmt, va_list ap) 171 { 172 char buf[1024]; 173 size_t len; 174 175 if (fmt != NULL) 176 evutil_vsnprintf(buf, sizeof(buf), fmt, ap); 177 else 178 buf[0] = '\0'; 179 180 if (errstr) { 181 len = strlen(buf); 182 if (len < sizeof(buf) - 3) { 183 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr); 184 } 185 } 186 187 event_log(severity, buf); 188 } 189 190 static event_log_cb log_fn = NULL; 191 192 void 193 event_set_log_callback(event_log_cb cb) 194 { 195 log_fn = cb; 196 } 197 198 static void 199 event_log(int severity, const char *msg) 200 { 201 if (log_fn) 202 log_fn(severity, msg); 203 else { 204 const char *severity_str; 205 switch (severity) { 206 case _EVENT_LOG_DEBUG: 207 severity_str = "debug"; 208 break; 209 case _EVENT_LOG_MSG: 210 severity_str = "msg"; 211 break; 212 case _EVENT_LOG_WARN: 213 severity_str = "warn"; 214 break; 215 case _EVENT_LOG_ERR: 216 severity_str = "err"; 217 break; 218 default: 219 severity_str = "???"; 220 break; 221 } 222 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg); 223 } 224 } 225
