1 /* $NetBSD: log.c,v 1.1.1.1 2013/12/27 23:31:21 christos Exp $ */ 2 3 /* $OpenBSD: err.c,v 1.2 2002/06/25 15:50:15 mickey Exp $ */ 4 5 /* 6 * log.c 7 * 8 * Based on err.c, which was adapted from OpenBSD libc *err* *warn* code. 9 * 10 * Copyright (c) 2005-2012 Niels Provos and Nick Mathewson 11 * 12 * Copyright (c) 2000 Dug Song <dugsong@monkey.org> 13 * 14 * Copyright (c) 1993 15 * The Regents of the University of California. All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 3. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 */ 41 42 #include "event2/event-config.h" 43 #include "evconfig-private.h" 44 45 #ifdef _WIN32 46 #include <winsock2.h> 47 #define WIN32_LEAN_AND_MEAN 48 #include <windows.h> 49 #undef WIN32_LEAN_AND_MEAN 50 #endif 51 #include <sys/types.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <stdarg.h> 55 #include <string.h> 56 #include <errno.h> 57 #include "event2/event.h" 58 #include "event2/util.h" 59 60 #include "log-internal.h" 61 62 static void warn_helper_(int severity, const char *errstr, const char *fmt, 63 va_list ap); 64 static void event_log(int severity, const char *msg); 65 static void event_exit(int errcode) EV_NORETURN; 66 67 static event_fatal_cb fatal_fn = NULL; 68 69 #ifdef EVENT_DEBUG_LOGGING_ENABLED 70 #ifdef USE_DEBUG 71 #define DEFAULT_MASK EVENT_DBG_ALL 72 #else 73 #define DEFAULT_MASK 0 74 #endif 75 76 #ifdef USE_GLOBAL_FOR_DEBUG_LOGGING 77 ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 78 #else 79 static ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 80 ev_uint32_t 81 event_debug_get_logging_mask_(void) 82 { 83 return event_debug_logging_mask_; 84 } 85 #endif 86 #endif /* EVENT_DEBUG_LOGGING_ENABLED */ 87 88 void 89 event_enable_debug_logging(ev_uint32_t which) 90 { 91 #ifdef EVENT_DEBUG_LOGGING_ENABLED 92 event_debug_logging_mask_ = which; 93 #endif 94 } 95 96 void 97 event_set_fatal_callback(event_fatal_cb cb) 98 { 99 fatal_fn = cb; 100 } 101 102 static void 103 event_exit(int errcode) 104 { 105 if (fatal_fn) { 106 fatal_fn(errcode); 107 exit(errcode); /* should never be reached */ 108 } else if (errcode == EVENT_ERR_ABORT_) 109 abort(); 110 else 111 exit(errcode); 112 } 113 114 void 115 event_err(int eval, const char *fmt, ...) 116 { 117 va_list ap; 118 119 va_start(ap, fmt); 120 warn_helper_(EVENT_LOG_ERR, strerror(errno), fmt, ap); 121 va_end(ap); 122 event_exit(eval); 123 } 124 125 void 126 event_warn(const char *fmt, ...) 127 { 128 va_list ap; 129 130 va_start(ap, fmt); 131 warn_helper_(EVENT_LOG_WARN, strerror(errno), fmt, ap); 132 va_end(ap); 133 } 134 135 void 136 event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...) 137 { 138 va_list ap; 139 int err = evutil_socket_geterror(sock); 140 141 va_start(ap, fmt); 142 warn_helper_(EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap); 143 va_end(ap); 144 event_exit(eval); 145 } 146 147 void 148 event_sock_warn(evutil_socket_t sock, const char *fmt, ...) 149 { 150 va_list ap; 151 int err = evutil_socket_geterror(sock); 152 153 va_start(ap, fmt); 154 warn_helper_(EVENT_LOG_WARN, evutil_socket_error_to_string(err), fmt, ap); 155 va_end(ap); 156 } 157 158 void 159 event_errx(int eval, const char *fmt, ...) 160 { 161 va_list ap; 162 163 va_start(ap, fmt); 164 warn_helper_(EVENT_LOG_ERR, NULL, fmt, ap); 165 va_end(ap); 166 event_exit(eval); 167 } 168 169 void 170 event_warnx(const char *fmt, ...) 171 { 172 va_list ap; 173 174 va_start(ap, fmt); 175 warn_helper_(EVENT_LOG_WARN, NULL, fmt, ap); 176 va_end(ap); 177 } 178 179 void 180 event_msgx(const char *fmt, ...) 181 { 182 va_list ap; 183 184 va_start(ap, fmt); 185 warn_helper_(EVENT_LOG_MSG, NULL, fmt, ap); 186 va_end(ap); 187 } 188 189 void 190 event_debugx_(const char *fmt, ...) 191 { 192 va_list ap; 193 194 va_start(ap, fmt); 195 warn_helper_(EVENT_LOG_DEBUG, NULL, fmt, ap); 196 va_end(ap); 197 } 198 199 static void 200 warn_helper_(int severity, const char *errstr, const char *fmt, va_list ap) 201 { 202 char buf[1024]; 203 size_t len; 204 205 if (fmt != NULL) 206 evutil_vsnprintf(buf, sizeof(buf), fmt, ap); 207 else 208 buf[0] = '\0'; 209 210 if (errstr) { 211 len = strlen(buf); 212 if (len < sizeof(buf) - 3) { 213 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr); 214 } 215 } 216 217 event_log(severity, buf); 218 } 219 220 static event_log_cb log_fn = NULL; 221 222 void 223 event_set_log_callback(event_log_cb cb) 224 { 225 log_fn = cb; 226 } 227 228 static void 229 event_log(int severity, const char *msg) 230 { 231 if (log_fn) 232 log_fn(severity, msg); 233 else { 234 const char *severity_str; 235 switch (severity) { 236 case EVENT_LOG_DEBUG: 237 severity_str = "debug"; 238 break; 239 case EVENT_LOG_MSG: 240 severity_str = "msg"; 241 break; 242 case EVENT_LOG_WARN: 243 severity_str = "warn"; 244 break; 245 case EVENT_LOG_ERR: 246 severity_str = "err"; 247 break; 248 default: 249 severity_str = "???"; 250 break; 251 } 252 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg); 253 } 254 } 255