1 /* $OpenBSD: err.c,v 1.2 2002/06/25 15:50:15 mickey Exp $ */
2
3 /*
4 * log.c
5 *
6 * Based on err.c, which was adapted from OpenBSD libc *err* *warn* code.
7 *
8 * Copyright (c) 2005-2012 Niels Provos and Nick Mathewson
9 *
10 * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
11 *
12 * Copyright (c) 1993
13 * The Regents of the University of California. All rights reserved.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40 #include "event2/event-config.h"
41 #include "evconfig-private.h"
42
43 #ifdef _WIN32
44 #include <winsock2.h>
45 #define WIN32_LEAN_AND_MEAN
46 #include <windows.h>
47 #undef WIN32_LEAN_AND_MEAN
48 #endif
49 #include <sys/types.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <stdarg.h>
53 #include <string.h>
54 #include <errno.h>
55 #include "event2/event.h"
56 #include "event2/util.h"
57
58 #include "log-internal.h"
59
60 static void event_log(int severity, const char *msg);
61 static void event_exit(int errcode) EV_NORETURN;
62
63 static event_fatal_cb fatal_fn = NULL;
64
65 #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 EVENT2_EXPORT_SYMBOL ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK;
73 #endif /* EVENT_DEBUG_LOGGING_ENABLED */
74
75 void
event_enable_debug_logging(ev_uint32_t which)76 event_enable_debug_logging(ev_uint32_t which)
77 {
78 #ifdef EVENT_DEBUG_LOGGING_ENABLED
79 event_debug_logging_mask_ = which;
80 #endif
81 }
82
83 void
event_set_fatal_callback(event_fatal_cb cb)84 event_set_fatal_callback(event_fatal_cb cb)
85 {
86 fatal_fn = cb;
87 }
88
89 static void
event_exit(int errcode)90 event_exit(int errcode)
91 {
92 if (fatal_fn) {
93 fatal_fn(errcode);
94 exit(errcode); /* should never be reached */
95 } else if (errcode == EVENT_ERR_ABORT_)
96 abort();
97 else
98 exit(errcode);
99 }
100
101 void
event_err(int eval,const char * fmt,...)102 event_err(int eval, const char *fmt, ...)
103 {
104 va_list ap;
105
106 va_start(ap, fmt);
107 event_logv_(EVENT_LOG_ERR, strerror(errno), fmt, ap);
108 va_end(ap);
109 event_exit(eval);
110 }
111
112 void
event_warn(const char * fmt,...)113 event_warn(const char *fmt, ...)
114 {
115 va_list ap;
116
117 va_start(ap, fmt);
118 event_logv_(EVENT_LOG_WARN, strerror(errno), fmt, ap);
119 va_end(ap);
120 }
121
122 void
event_sock_err(int eval,evutil_socket_t sock,const char * fmt,...)123 event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...)
124 {
125 va_list ap;
126 int err = evutil_socket_geterror(sock);
127
128 va_start(ap, fmt);
129 event_logv_(EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap);
130 va_end(ap);
131 event_exit(eval);
132 }
133
134 void
event_sock_warn(evutil_socket_t sock,const char * fmt,...)135 event_sock_warn(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_WARN, evutil_socket_error_to_string(err), fmt, ap);
142 va_end(ap);
143 }
144
145 void
event_errx(int eval,const char * fmt,...)146 event_errx(int eval, const char *fmt, ...)
147 {
148 va_list ap;
149
150 va_start(ap, fmt);
151 event_logv_(EVENT_LOG_ERR, NULL, fmt, ap);
152 va_end(ap);
153 event_exit(eval);
154 }
155
156 void
event_warnx(const char * fmt,...)157 event_warnx(const char *fmt, ...)
158 {
159 va_list ap;
160
161 va_start(ap, fmt);
162 event_logv_(EVENT_LOG_WARN, NULL, fmt, ap);
163 va_end(ap);
164 }
165
166 void
event_msgx(const char * fmt,...)167 event_msgx(const char *fmt, ...)
168 {
169 va_list ap;
170
171 va_start(ap, fmt);
172 event_logv_(EVENT_LOG_MSG, NULL, fmt, ap);
173 va_end(ap);
174 }
175
176 void
event_debugx_(const char * fmt,...)177 event_debugx_(const char *fmt, ...)
178 {
179 va_list ap;
180
181 va_start(ap, fmt);
182 event_logv_(EVENT_LOG_DEBUG, NULL, fmt, ap);
183 va_end(ap);
184 }
185
186 void
event_logv_(int severity,const char * errstr,const char * fmt,va_list ap)187 event_logv_(int severity, const char *errstr, const char *fmt, va_list ap)
188 {
189 char buf[1024];
190 size_t len;
191
192 if (severity == EVENT_LOG_DEBUG && !event_debug_get_logging_mask_())
193 return;
194
195 if (fmt != NULL)
196 evutil_vsnprintf(buf, sizeof(buf), fmt, ap);
197 else
198 buf[0] = '\0';
199
200 if (errstr) {
201 len = strlen(buf);
202 if (len < sizeof(buf) - 3) {
203 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr);
204 }
205 }
206
207 event_log(severity, buf);
208 }
209
210 static event_log_cb log_fn = NULL;
211
212 void
event_set_log_callback(event_log_cb cb)213 event_set_log_callback(event_log_cb cb)
214 {
215 log_fn = cb;
216 }
217
218 static void
event_log(int severity,const char * msg)219 event_log(int severity, const char *msg)
220 {
221 if (log_fn)
222 log_fn(severity, msg);
223 else {
224 const char *severity_str;
225 switch (severity) {
226 case EVENT_LOG_DEBUG:
227 severity_str = "debug";
228 break;
229 case EVENT_LOG_MSG:
230 severity_str = "msg";
231 break;
232 case EVENT_LOG_WARN:
233 severity_str = "warn";
234 break;
235 case EVENT_LOG_ERR:
236 severity_str = "err";
237 break;
238 default:
239 severity_str = "???";
240 break;
241 }
242 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg);
243 }
244 }
245