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comparison: ipc/chromium/src/third_party/libevent/log.c

ipc/chromium/src/third_party/libevent/log.c

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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
42 #ifdef WIN32
43 #include <winsock2.h>
44 #define WIN32_LEAN_AND_MEAN
45 #include <windows.h>
46 #undef WIN32_LEAN_AND_MEAN
47 #endif
48 #include <sys/types.h>
49 #include <stdio.h>
50 #include <stdlib.h>
51 #include <stdarg.h>
52 #include <string.h>
53 #include <errno.h>
54 #include "event2/event.h"
55 #include "event2/util.h"
56
57 #include "log-internal.h"
58
59 static void _warn_helper(int severity, const char *errstr, const char *fmt,
60 va_list ap);
61 static void event_log(int severity, const char *msg);
62 static void event_exit(int errcode) EV_NORETURN;
63
64 static event_fatal_cb fatal_fn = NULL;
65
66 void
67 event_set_fatal_callback(event_fatal_cb cb)
68 {
69 fatal_fn = cb;
70 }
71
72 static void
73 event_exit(int errcode)
74 {
75 if (fatal_fn) {
76 fatal_fn(errcode);
77 exit(errcode); /* should never be reached */
78 } else if (errcode == _EVENT_ERR_ABORT)
79 abort();
80 else
81 exit(errcode);
82 }
83
84 void
85 event_err(int eval, const char *fmt, ...)
86 {
87 va_list ap;
88
89 va_start(ap, fmt);
90 _warn_helper(_EVENT_LOG_ERR, strerror(errno), fmt, ap);
91 va_end(ap);
92 event_exit(eval);
93 }
94
95 void
96 event_warn(const char *fmt, ...)
97 {
98 va_list ap;
99
100 va_start(ap, fmt);
101 _warn_helper(_EVENT_LOG_WARN, strerror(errno), fmt, ap);
102 va_end(ap);
103 }
104
105 void
106 event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...)
107 {
108 va_list ap;
109 int err = evutil_socket_geterror(sock);
110
111 va_start(ap, fmt);
112 _warn_helper(_EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap);
113 va_end(ap);
114 event_exit(eval);
115 }
116
117 void
118 event_sock_warn(evutil_socket_t sock, const char *fmt, ...)
119 {
120 va_list ap;
121 int err = evutil_socket_geterror(sock);
122
123 va_start(ap, fmt);
124 _warn_helper(_EVENT_LOG_WARN, evutil_socket_error_to_string(err), fmt, ap);
125 va_end(ap);
126 }
127
128 void
129 event_errx(int eval, const char *fmt, ...)
130 {
131 va_list ap;
132
133 va_start(ap, fmt);
134 _warn_helper(_EVENT_LOG_ERR, NULL, fmt, ap);
135 va_end(ap);
136 event_exit(eval);
137 }
138
139 void
140 event_warnx(const char *fmt, ...)
141 {
142 va_list ap;
143
144 va_start(ap, fmt);
145 _warn_helper(_EVENT_LOG_WARN, NULL, fmt, ap);
146 va_end(ap);
147 }
148
149 void
150 event_msgx(const char *fmt, ...)
151 {
152 va_list ap;
153
154 va_start(ap, fmt);
155 _warn_helper(_EVENT_LOG_MSG, NULL, fmt, ap);
156 va_end(ap);
157 }
158
159 void
160 _event_debugx(const char *fmt, ...)
161 {
162 va_list ap;
163
164 va_start(ap, fmt);
165 _warn_helper(_EVENT_LOG_DEBUG, NULL, fmt, ap);
166 va_end(ap);
167 }
168
169 static void
170 _warn_helper(int severity, const char *errstr, const char *fmt, va_list ap)
171 {
172 char buf[1024];
173 size_t len;
174
175 if (fmt != NULL)
176 evutil_vsnprintf(buf, sizeof(buf), fmt, ap);
177 else
178 buf[0] = '\0';
179
180 if (errstr) {
181 len = strlen(buf);
182 if (len < sizeof(buf) - 3) {
183 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr);
184 }
185 }
186
187 event_log(severity, buf);
188 }
189
190 static event_log_cb log_fn = NULL;
191
192 void
193 event_set_log_callback(event_log_cb cb)
194 {
195 log_fn = cb;
196 }
197
198 static void
199 event_log(int severity, const char *msg)
200 {
201 if (log_fn)
202 log_fn(severity, msg);
203 else {
204 const char *severity_str;
205 switch (severity) {
206 case _EVENT_LOG_DEBUG:
207 severity_str = "debug";
208 break;
209 case _EVENT_LOG_MSG:
210 severity_str = "msg";
211 break;
212 case _EVENT_LOG_WARN:
213 severity_str = "warn";
214 break;
215 case _EVENT_LOG_ERR:
216 severity_str = "err";
217 break;
218 default:
219 severity_str = "???";
220 break;
221 }
222 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg);
223 }
224 }

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