1 /* $NetBSD: log.c,v 1.6 2024/08/18 20:47:21 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 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 EVENT2_EXPORT_SYMBOL ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 75 #endif /* EVENT_DEBUG_LOGGING_ENABLED */ 76 77 void 78 event_enable_debug_logging(ev_uint32_t which) 79 { 80 #ifdef EVENT_DEBUG_LOGGING_ENABLED 81 event_debug_logging_mask_ = which; 82 #endif 83 } 84 85 void 86 event_set_fatal_callback(event_fatal_cb cb) 87 { 88 fatal_fn = cb; 89 } 90 91 static void 92 event_exit(int errcode) 93 { 94 if (fatal_fn) { 95 fatal_fn(errcode); 96 exit(errcode); /* should never be reached */ 97 } else if (errcode == EVENT_ERR_ABORT_) 98 abort(); 99 else 100 exit(errcode); 101 } 102 103 void 104 event_err(int eval, const char *fmt, ...) 105 { 106 va_list ap; 107 108 va_start(ap, fmt); 109 event_logv_(EVENT_LOG_ERR, strerror(errno), fmt, ap); 110 va_end(ap); 111 event_exit(eval); 112 } 113 114 void 115 event_warn(const char *fmt, ...) 116 { 117 va_list ap; 118 119 va_start(ap, fmt); 120 event_logv_(EVENT_LOG_WARN, strerror(errno), fmt, ap); 121 va_end(ap); 122 } 123 124 void 125 event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...) 126 { 127 va_list ap; 128 int err = evutil_socket_geterror(sock); 129 130 va_start(ap, fmt); 131 event_logv_(EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap); 132 va_end(ap); 133 event_exit(eval); 134 } 135 136 void 137 event_sock_warn(evutil_socket_t sock, const char *fmt, ...) 138 { 139 va_list ap; 140 int err = evutil_socket_geterror(sock); 141 142 va_start(ap, fmt); 143 event_logv_(EVENT_LOG_WARN, evutil_socket_error_to_string(err), fmt, ap); 144 va_end(ap); 145 } 146 147 void 148 event_errx(int eval, const char *fmt, ...) 149 { 150 va_list ap; 151 152 va_start(ap, fmt); 153 event_logv_(EVENT_LOG_ERR, NULL, fmt, ap); 154 va_end(ap); 155 event_exit(eval); 156 } 157 158 void 159 event_warnx(const char *fmt, ...) 160 { 161 va_list ap; 162 163 va_start(ap, fmt); 164 event_logv_(EVENT_LOG_WARN, NULL, fmt, ap); 165 va_end(ap); 166 } 167 168 void 169 event_msgx(const char *fmt, ...) 170 { 171 va_list ap; 172 173 va_start(ap, fmt); 174 event_logv_(EVENT_LOG_MSG, NULL, fmt, ap); 175 va_end(ap); 176 } 177 178 void 179 event_debugx_(const char *fmt, ...) 180 { 181 va_list ap; 182 183 va_start(ap, fmt); 184 event_logv_(EVENT_LOG_DEBUG, NULL, fmt, ap); 185 va_end(ap); 186 } 187 188 void 189 event_logv_(int severity, const char *errstr, const char *fmt, va_list ap) 190 { 191 char buf[1024]; 192 size_t len; 193 194 if (severity == EVENT_LOG_DEBUG && !event_debug_get_logging_mask_()) 195 return; 196 197 if (fmt != NULL) 198 evutil_vsnprintf(buf, sizeof(buf), fmt, ap); 199 else 200 buf[0] = '\0'; 201 202 if (errstr) { 203 len = strlen(buf); 204 if (len < sizeof(buf) - 3) { 205 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr); 206 } 207 } 208 209 event_log(severity, buf); 210 } 211 212 static event_log_cb log_fn = NULL; 213 214 void 215 event_set_log_callback(event_log_cb cb) 216 { 217 log_fn = cb; 218 } 219 220 static void 221 event_log(int severity, const char *msg) 222 { 223 if (log_fn) 224 log_fn(severity, msg); 225 else { 226 const char *severity_str; 227 switch (severity) { 228 case EVENT_LOG_DEBUG: 229 severity_str = "debug"; 230 break; 231 case EVENT_LOG_MSG: 232 severity_str = "msg"; 233 break; 234 case EVENT_LOG_WARN: 235 severity_str = "warn"; 236 break; 237 case EVENT_LOG_ERR: 238 severity_str = "err"; 239 break; 240 default: 241 severity_str = "???"; 242 break; 243 } 244 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg); 245 } 246 } 247