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 Nick Mathewson <nickm@freehaven.net>
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 #ifdef HAVE_CONFIG_H
41 #include "config.h"
42 #endif
43
44 #ifdef WIN32
45 #define WIN32_LEAN_AND_MEAN
46 #include <windows.h>
47 #undef WIN32_LEAN_AND_MEAN
48 #endif
49 #include <sys/types.h>
50 #ifdef HAVE_SYS_TIME_H
51 #include <sys/time.h>
52 #else
53 #include <sys/_libevent_time.h>
54 #endif
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <stdarg.h>
58 #include <string.h>
59 #include <errno.h>
60 #include "event.h"
61
62 #include "log.h"
63 #include "evutil.h"
64
65 static void _warn_helper(int severity, int log_errno, const char *fmt,
66 va_list ap);
67 static void event_log(int severity, const char *msg);
68
69 void
event_err(int eval,const char * fmt,...)70 event_err(int eval, const char *fmt, ...)
71 {
72 va_list ap;
73
74 va_start(ap, fmt);
75 _warn_helper(_EVENT_LOG_ERR, errno, fmt, ap);
76 va_end(ap);
77 exit(eval);
78 }
79
80 void
event_warn(const char * fmt,...)81 event_warn(const char *fmt, ...)
82 {
83 va_list ap;
84
85 va_start(ap, fmt);
86 _warn_helper(_EVENT_LOG_WARN, errno, fmt, ap);
87 va_end(ap);
88 }
89
90 void
event_errx(int eval,const char * fmt,...)91 event_errx(int eval, const char *fmt, ...)
92 {
93 va_list ap;
94
95 va_start(ap, fmt);
96 _warn_helper(_EVENT_LOG_ERR, -1, fmt, ap);
97 va_end(ap);
98 exit(eval);
99 }
100
101 void
event_warnx(const char * fmt,...)102 event_warnx(const char *fmt, ...)
103 {
104 va_list ap;
105
106 va_start(ap, fmt);
107 _warn_helper(_EVENT_LOG_WARN, -1, fmt, ap);
108 va_end(ap);
109 }
110
111 void
event_msgx(const char * fmt,...)112 event_msgx(const char *fmt, ...)
113 {
114 va_list ap;
115
116 va_start(ap, fmt);
117 _warn_helper(_EVENT_LOG_MSG, -1, fmt, ap);
118 va_end(ap);
119 }
120
121 void
_event_debugx(const char * fmt,...)122 _event_debugx(const char *fmt, ...)
123 {
124 va_list ap;
125
126 va_start(ap, fmt);
127 _warn_helper(_EVENT_LOG_DEBUG, -1, fmt, ap);
128 va_end(ap);
129 }
130
131 static void
_warn_helper(int severity,int log_errno,const char * fmt,va_list ap)132 _warn_helper(int severity, int log_errno, const char *fmt, va_list ap)
133 {
134 char buf[1024];
135 size_t len;
136
137 if (fmt != NULL)
138 evutil_vsnprintf(buf, sizeof(buf), fmt, ap);
139 else
140 buf[0] = '\0';
141
142 if (log_errno >= 0) {
143 len = strlen(buf);
144 if (len < sizeof(buf) - 3) {
145 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s",
146 strerror(log_errno));
147 }
148 }
149
150 event_log(severity, buf);
151 }
152
153 static event_log_cb log_fn = NULL;
154
155 void
event_set_log_callback(event_log_cb cb)156 event_set_log_callback(event_log_cb cb)
157 {
158 log_fn = cb;
159 }
160
161 static void
event_log(int severity,const char * msg)162 event_log(int severity, const char *msg)
163 {
164 if (log_fn)
165 log_fn(severity, msg);
166 else {
167 const char *severity_str;
168 switch (severity) {
169 case _EVENT_LOG_DEBUG:
170 severity_str = "debug";
171 break;
172 case _EVENT_LOG_MSG:
173 severity_str = "msg";
174 break;
175 case _EVENT_LOG_WARN:
176 severity_str = "warn";
177 break;
178 case _EVENT_LOG_ERR:
179 severity_str = "err";
180 break;
181 default:
182 severity_str = "???";
183 break;
184 }
185 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg);
186 }
187 }
188