log.c revision 285830
1189251Ssam/* $OpenBSD: err.c,v 1.2 2002/06/25 15:50:15 mickey Exp $ */ 2189251Ssam 3189251Ssam/* 4189251Ssam * log.c 5252726Srpaulo * 6252726Srpaulo * Based on err.c, which was adapted from OpenBSD libc *err* *warn* code. 7189251Ssam * 8189251Ssam * Copyright (c) 2005-2012 Niels Provos and Nick Mathewson 9189251Ssam * 10189251Ssam * Copyright (c) 2000 Dug Song <dugsong@monkey.org> 11189251Ssam * 12189251Ssam * Copyright (c) 1993 13189251Ssam * The Regents of the University of California. All rights reserved. 14189251Ssam * 15189251Ssam * Redistribution and use in source and binary forms, with or without 16189251Ssam * modification, are permitted provided that the following conditions 17189251Ssam * are met: 18189251Ssam * 1. Redistributions of source code must retain the above copyright 19189251Ssam * notice, this list of conditions and the following disclaimer. 20189251Ssam * 2. Redistributions in binary form must reproduce the above copyright 21189251Ssam * notice, this list of conditions and the following disclaimer in the 22189251Ssam * documentation and/or other materials provided with the distribution. 23189251Ssam * 3. Neither the name of the University nor the names of its contributors 24189251Ssam * may be used to endorse or promote products derived from this software 25189251Ssam * without specific prior written permission. 26189251Ssam * 27189251Ssam * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28189251Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29189251Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30189251Ssam * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31189251Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32189251Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33189251Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34189251Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35189251Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36189251Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37189251Ssam * SUCH DAMAGE. 38189251Ssam */ 39189251Ssam 40189251Ssam#include "event2/event-config.h" 41189251Ssam#include "evconfig-private.h" 42189251Ssam 43189251Ssam#ifdef _WIN32 44189251Ssam#include <winsock2.h> 45189251Ssam#define WIN32_LEAN_AND_MEAN 46189251Ssam#include <windows.h> 47189251Ssam#undef WIN32_LEAN_AND_MEAN 48189251Ssam#endif 49189251Ssam#include <sys/types.h> 50189251Ssam#include <stdio.h> 51189251Ssam#include <stdlib.h> 52189251Ssam#include <stdarg.h> 53189251Ssam#include <string.h> 54189251Ssam#include <errno.h> 55189251Ssam#include "event2/event.h" 56189251Ssam#include "event2/util.h" 57189251Ssam 58189251Ssam#include "log-internal.h" 59189251Ssam 60189251Ssamstatic void event_log(int severity, const char *msg); 61189251Ssamstatic void event_exit(int errcode) EV_NORETURN; 62189251Ssam 63189251Ssamstatic event_fatal_cb fatal_fn = NULL; 64189251Ssam 65189251Ssam#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 73ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 74#else 75static ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK; 76ev_uint32_t 77event_debug_get_logging_mask_(void) 78{ 79 return event_debug_logging_mask_; 80} 81#endif 82#endif /* EVENT_DEBUG_LOGGING_ENABLED */ 83 84void 85event_enable_debug_logging(ev_uint32_t which) 86{ 87#ifdef EVENT_DEBUG_LOGGING_ENABLED 88 event_debug_logging_mask_ = which; 89#endif 90} 91 92void 93event_set_fatal_callback(event_fatal_cb cb) 94{ 95 fatal_fn = cb; 96} 97 98static void 99event_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 110void 111event_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 121void 122event_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 131void 132event_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 143void 144event_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 154void 155event_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 165void 166event_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 175void 176event_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 185void 186event_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 195void 196event_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 219static event_log_cb log_fn = NULL; 220 221void 222event_set_log_callback(event_log_cb cb) 223{ 224 log_fn = cb; 225} 226 227static void 228event_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