1 /* $NetBSD: log.c,v 1.5 2020/05/25 20:47:33 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 event_log(int severity, const char *msg); 63 static void event_exit(int errcode) EV_NORETURN; 64 65 static event_fatal_cb fatal_fn = NULL; 66 67 #ifdef EVENT_DEBUG_LOGGING_ENABLED 68 #ifdef USE_DEBUG 69 #define DEFAULT_MASK EVENT_DBG_ALL 70 #else 71 #define DEFAULT_MASK 0 72 #endif 73 74 #ifdef USE_GLOBAL_FOR_DEBUG_LOGGING 75 ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 76 #else 77 static ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 78 ev_uint32_t 79 event_debug_get_logging_mask_(void) 80 { 81 return event_debug_logging_mask_; 82 } 83 #endif 84 #endif /* EVENT_DEBUG_LOGGING_ENABLED */ 85 86 void 87 event_enable_debug_logging(ev_uint32_t which) 88 { 89 #ifdef EVENT_DEBUG_LOGGING_ENABLED 90 event_debug_logging_mask_ = which; 91 #endif 92 } 93 94 void 95 event_set_fatal_callback(event_fatal_cb cb) 96 { 97 fatal_fn = cb; 98 } 99 100 static void 101 event_exit(int errcode) 102 { 103 if (fatal_fn) { 104 fatal_fn(errcode); 105 exit(errcode); /* should never be reached */ 106 } else if (errcode == EVENT_ERR_ABORT_) 107 abort(); 108 else 109 exit(errcode); 110 } 111 112 void 113 event_err(int eval, const char *fmt, ...) 114 { 115 va_list ap; 116 117 va_start(ap, fmt); 118 event_logv_(EVENT_LOG_ERR, strerror(errno), fmt, ap); 119 va_end(ap); 120 event_exit(eval); 121 } 122 123 void 124 event_warn(const char *fmt, ...) 125 { 126 va_list ap; 127 128 va_start(ap, fmt); 129 event_logv_(EVENT_LOG_WARN, strerror(errno), fmt, ap); 130 va_end(ap); 131 } 132 133 void 134 event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...) 135 { 136 va_list ap; 137 int err = evutil_socket_geterror(sock); 138 139 va_start(ap, fmt); 140 event_logv_(EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap); 141 va_end(ap); 142 event_exit(eval); 143 } 144 145 void 146 event_sock_warn(evutil_socket_t sock, const char *fmt, ...) 147 { 148 va_list ap; 149 int err = evutil_socket_geterror(sock); 150 151 va_start(ap, fmt); 152 event_logv_(EVENT_LOG_WARN, evutil_socket_error_to_string(err), fmt, ap); 153 va_end(ap); 154 } 155 156 void 157 event_errx(int eval, const char *fmt, ...) 158 { 159 va_list ap; 160 161 va_start(ap, fmt); 162 event_logv_(EVENT_LOG_ERR, NULL, fmt, ap); 163 va_end(ap); 164 event_exit(eval); 165 } 166 167 void 168 event_warnx(const char *fmt, ...) 169 { 170 va_list ap; 171 172 va_start(ap, fmt); 173 event_logv_(EVENT_LOG_WARN, NULL, fmt, ap); 174 va_end(ap); 175 } 176 177 void 178 event_msgx(const char *fmt, ...) 179 { 180 va_list ap; 181 182 va_start(ap, fmt); 183 event_logv_(EVENT_LOG_MSG, NULL, fmt, ap); 184 va_end(ap); 185 } 186 187 void 188 event_debugx_(const char *fmt, ...) 189 { 190 va_list ap; 191 192 va_start(ap, fmt); 193 event_logv_(EVENT_LOG_DEBUG, NULL, fmt, ap); 194 va_end(ap); 195 } 196 197 void 198 event_logv_(int severity, const char *errstr, const char *fmt, va_list ap) 199 { 200 char buf[1024]; 201 size_t len; 202 203 if (severity == EVENT_LOG_DEBUG && !event_debug_get_logging_mask_()) 204 return; 205 206 if (fmt != NULL) 207 evutil_vsnprintf(buf, sizeof(buf), fmt, ap); 208 else 209 buf[0] = '\0'; 210 211 if (errstr) { 212 len = strlen(buf); 213 if (len < sizeof(buf) - 3) { 214 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr); 215 } 216 } 217 218 event_log(severity, buf); 219 } 220 221 static event_log_cb log_fn = NULL; 222 223 void 224 event_set_log_callback(event_log_cb cb) 225 { 226 log_fn = cb; 227 } 228 229 static void 230 event_log(int severity, const char *msg) 231 { 232 if (log_fn) 233 log_fn(severity, msg); 234 else { 235 const char *severity_str; 236 switch (severity) { 237 case EVENT_LOG_DEBUG: 238 severity_str = "debug"; 239 break; 240 case EVENT_LOG_MSG: 241 severity_str = "msg"; 242 break; 243 case EVENT_LOG_WARN: 244 severity_str = "warn"; 245 break; 246 case EVENT_LOG_ERR: 247 severity_str = "err"; 248 break; 249 default: 250 severity_str = "???"; 251 break; 252 } 253 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg); 254 } 255 } 256