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@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 #include "evconfig-private.h" 42 43 #ifdef _WIN32 44 #include <winsock2.h> 45 #define WIN32_LEAN_AND_MEAN 46 #include <windows.h> 47 #undef WIN32_LEAN_AND_MEAN 48 #endif 49 #include <sys/types.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <stdarg.h> 53 #include <string.h> 54 #include <errno.h> 55 #include "event2/event.h" 56 #include "event2/util.h" 57 58 #include "log-internal.h" 59 60 static void event_log(int severity, const char *msg); 61 static void event_exit(int errcode) EV_NORETURN; 62 63 static event_fatal_cb fatal_fn = NULL; 64 65 #ifdef EVENT_DEBUG_LOGGING_ENABLED 66 #ifdef USE_DEBUG 67 #define DEFAULT_MASK EVENT_DBG_ALL 68 #else 69 #define DEFAULT_MASK 0 70 #endif 71 72 #ifdef USE_GLOBAL_FOR_DEBUG_LOGGING 73 ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 74 #else 75 static ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 76 ev_uint32_t 77 event_debug_get_logging_mask_(void) 78 { 79 return event_debug_logging_mask_; 80 } 81 #endif 82 #endif /* EVENT_DEBUG_LOGGING_ENABLED */ 83 84 void 85 event_enable_debug_logging(ev_uint32_t which) 86 { 87 #ifdef EVENT_DEBUG_LOGGING_ENABLED 88 event_debug_logging_mask_ = which; 89 #endif 90 } 91 92 void 93 event_set_fatal_callback(event_fatal_cb cb) 94 { 95 fatal_fn = cb; 96 } 97 98 static void 99 event_exit(int errcode) 100 { 101 if (fatal_fn) { 102 fatal_fn(errcode); 103 exit(errcode); /* should never be reached */ 104 } else if (errcode == EVENT_ERR_ABORT_) 105 abort(); 106 else 107 exit(errcode); 108 } 109 110 void 111 event_err(int eval, const char *fmt, ...) 112 { 113 va_list ap; 114 115 va_start(ap, fmt); 116 event_logv_(EVENT_LOG_ERR, strerror(errno), fmt, ap); 117 va_end(ap); 118 event_exit(eval); 119 } 120 121 void 122 event_warn(const char *fmt, ...) 123 { 124 va_list ap; 125 126 va_start(ap, fmt); 127 event_logv_(EVENT_LOG_WARN, strerror(errno), fmt, ap); 128 va_end(ap); 129 } 130 131 void 132 event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...) 133 { 134 va_list ap; 135 int err = evutil_socket_geterror(sock); 136 137 va_start(ap, fmt); 138 event_logv_(EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap); 139 va_end(ap); 140 event_exit(eval); 141 } 142 143 void 144 event_sock_warn(evutil_socket_t sock, const char *fmt, ...) 145 { 146 va_list ap; 147 int err = evutil_socket_geterror(sock); 148 149 va_start(ap, fmt); 150 event_logv_(EVENT_LOG_WARN, evutil_socket_error_to_string(err), fmt, ap); 151 va_end(ap); 152 } 153 154 void 155 event_errx(int eval, const char *fmt, ...) 156 { 157 va_list ap; 158 159 va_start(ap, fmt); 160 event_logv_(EVENT_LOG_ERR, NULL, fmt, ap); 161 va_end(ap); 162 event_exit(eval); 163 } 164 165 void 166 event_warnx(const char *fmt, ...) 167 { 168 va_list ap; 169 170 va_start(ap, fmt); 171 event_logv_(EVENT_LOG_WARN, NULL, fmt, ap); 172 va_end(ap); 173 } 174 175 void 176 event_msgx(const char *fmt, ...) 177 { 178 va_list ap; 179 180 va_start(ap, fmt); 181 event_logv_(EVENT_LOG_MSG, NULL, fmt, ap); 182 va_end(ap); 183 } 184 185 void 186 event_debugx_(const char *fmt, ...) 187 { 188 va_list ap; 189 190 va_start(ap, fmt); 191 event_logv_(EVENT_LOG_DEBUG, NULL, fmt, ap); 192 va_end(ap); 193 } 194 195 void 196 event_logv_(int severity, const char *errstr, const char *fmt, va_list ap) 197 { 198 char buf[1024]; 199 size_t len; 200 201 if (severity == EVENT_LOG_DEBUG && !event_debug_get_logging_mask_()) 202 return; 203 204 if (fmt != NULL) 205 evutil_vsnprintf(buf, sizeof(buf), fmt, ap); 206 else 207 buf[0] = '\0'; 208 209 if (errstr) { 210 len = strlen(buf); 211 if (len < sizeof(buf) - 3) { 212 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr); 213 } 214 } 215 216 event_log(severity, buf); 217 } 218 219 static event_log_cb log_fn = NULL; 220 221 void 222 event_set_log_callback(event_log_cb cb) 223 { 224 log_fn = cb; 225 } 226 227 static void 228 event_log(int severity, const char *msg) 229 { 230 if (log_fn) 231 log_fn(severity, msg); 232 else { 233 const char *severity_str; 234 switch (severity) { 235 case EVENT_LOG_DEBUG: 236 severity_str = "debug"; 237 break; 238 case EVENT_LOG_MSG: 239 severity_str = "msg"; 240 break; 241 case EVENT_LOG_WARN: 242 severity_str = "warn"; 243 break; 244 case EVENT_LOG_ERR: 245 severity_str = "err"; 246 break; 247 default: 248 severity_str = "???"; 249 break; 250 } 251 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg); 252 } 253 } 254