1 /* $NetBSD: log.c,v 1.5 2017/01/31 23:17:39 christos Exp $ */ 2 /* $OpenBSD: err.c,v 1.2 2002/06/25 15:50:15 mickey Exp $ */ 3 4 /* 5 * log.c 6 * 7 * Based on err.c, which was adapted from OpenBSD libc *err* *warn* code. 8 * 9 * Copyright (c) 2005-2012 Niels Provos and Nick Mathewson 10 * 11 * Copyright (c) 2000 Dug Song <dugsong@monkey.org> 12 * 13 * Copyright (c) 1993 14 * The Regents of the University of California. All rights reserved. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #include "event2/event-config.h" 42 #include <sys/cdefs.h> 43 __RCSID("$NetBSD: log.c,v 1.5 2017/01/31 23:17:39 christos Exp $"); 44 #include "evconfig-private.h" 45 46 #ifdef _WIN32 47 #include <winsock2.h> 48 #define WIN32_LEAN_AND_MEAN 49 #include <windows.h> 50 #undef WIN32_LEAN_AND_MEAN 51 #endif 52 #include <sys/types.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <stdarg.h> 56 #include <string.h> 57 #include <errno.h> 58 #include "event2/event.h" 59 #include "event2/util.h" 60 61 #include "log-internal.h" 62 63 static void event_log(int severity, const char *msg); 64 static void event_exit(int errcode) EV_NORETURN; 65 66 static event_fatal_cb fatal_fn = NULL; 67 68 #ifdef EVENT_DEBUG_LOGGING_ENABLED 69 #ifdef USE_DEBUG 70 #define DEFAULT_MASK EVENT_DBG_ALL 71 #else 72 #define DEFAULT_MASK 0 73 #endif 74 75 #ifdef USE_GLOBAL_FOR_DEBUG_LOGGING 76 ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 77 #else 78 static ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 79 ev_uint32_t 80 event_debug_get_logging_mask_(void) 81 { 82 return event_debug_logging_mask_; 83 } 84 #endif 85 #endif /* EVENT_DEBUG_LOGGING_ENABLED */ 86 87 void 88 event_enable_debug_logging(ev_uint32_t which) 89 { 90 #ifdef EVENT_DEBUG_LOGGING_ENABLED 91 event_debug_logging_mask_ = which; 92 #endif 93 } 94 95 void 96 event_set_fatal_callback(event_fatal_cb cb) 97 { 98 fatal_fn = cb; 99 } 100 101 static void 102 event_exit(int errcode) 103 { 104 if (fatal_fn) { 105 fatal_fn(errcode); 106 exit(errcode); /* should never be reached */ 107 } else if (errcode == EVENT_ERR_ABORT_) 108 abort(); 109 else 110 exit(errcode); 111 } 112 113 void 114 event_err(int eval, const char *fmt, ...) 115 { 116 va_list ap; 117 118 va_start(ap, fmt); 119 event_logv_(EVENT_LOG_ERR, strerror(errno), fmt, ap); 120 va_end(ap); 121 event_exit(eval); 122 } 123 124 void 125 event_warn(const char *fmt, ...) 126 { 127 va_list ap; 128 129 va_start(ap, fmt); 130 event_logv_(EVENT_LOG_WARN, strerror(errno), fmt, ap); 131 va_end(ap); 132 } 133 134 void 135 event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...) 136 { 137 va_list ap; 138 int err = evutil_socket_geterror(sock); 139 140 va_start(ap, fmt); 141 event_logv_(EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap); 142 va_end(ap); 143 event_exit(eval); 144 } 145 146 void 147 event_sock_warn(evutil_socket_t sock, const char *fmt, ...) 148 { 149 va_list ap; 150 int err = evutil_socket_geterror(sock); 151 152 va_start(ap, fmt); 153 event_logv_(EVENT_LOG_WARN, evutil_socket_error_to_string(err), fmt, ap); 154 va_end(ap); 155 } 156 157 void 158 event_errx(int eval, const char *fmt, ...) 159 { 160 va_list ap; 161 162 va_start(ap, fmt); 163 event_logv_(EVENT_LOG_ERR, NULL, fmt, ap); 164 va_end(ap); 165 event_exit(eval); 166 } 167 168 void 169 event_warnx(const char *fmt, ...) 170 { 171 va_list ap; 172 173 va_start(ap, fmt); 174 event_logv_(EVENT_LOG_WARN, NULL, fmt, ap); 175 va_end(ap); 176 } 177 178 void 179 event_msgx(const char *fmt, ...) 180 { 181 va_list ap; 182 183 va_start(ap, fmt); 184 event_logv_(EVENT_LOG_MSG, NULL, fmt, ap); 185 va_end(ap); 186 } 187 188 void 189 event_debugx_(const char *fmt, ...) 190 { 191 va_list ap; 192 193 va_start(ap, fmt); 194 event_logv_(EVENT_LOG_DEBUG, NULL, fmt, ap); 195 va_end(ap); 196 } 197 198 void 199 event_logv_(int severity, const char *errstr, const char *fmt, va_list ap) 200 { 201 char buf[1024]; 202 size_t len; 203 204 if (severity == EVENT_LOG_DEBUG && !event_debug_get_logging_mask_()) 205 return; 206 207 if (fmt != NULL) 208 evutil_vsnprintf(buf, sizeof(buf), fmt, ap); 209 else 210 buf[0] = '\0'; 211 212 if (errstr) { 213 len = strlen(buf); 214 if (len < sizeof(buf) - 3) { 215 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr); 216 } 217 } 218 219 event_log(severity, buf); 220 } 221 222 static event_log_cb log_fn = NULL; 223 224 void 225 event_set_log_callback(event_log_cb cb) 226 { 227 log_fn = cb; 228 } 229 230 static void 231 event_log(int severity, const char *msg) 232 { 233 if (log_fn) 234 log_fn(severity, msg); 235 else { 236 const char *severity_str; 237 switch (severity) { 238 case EVENT_LOG_DEBUG: 239 severity_str = "debug"; 240 break; 241 case EVENT_LOG_MSG: 242 severity_str = "msg"; 243 break; 244 case EVENT_LOG_WARN: 245 severity_str = "warn"; 246 break; 247 case EVENT_LOG_ERR: 248 severity_str = "err"; 249 break; 250 default: 251 severity_str = "???"; 252 break; 253 } 254 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg); 255 } 256 } 257