1 /* $OpenBSD: log.c,v 1.6 2010/04/21 20:02:40 nicm Exp $ */
2
3 /*
4 * log.c
5 *
6 * Based on err.c, which was adapted from OpenBSD libc *err* *warn* code.
7 *
8 * Copyright © 2013
9 * Thorsten “mirabilos” Glaser <tg@mirbsd.org>
10 *
11 * Copyright (c) 2005 Nick Mathewson <nickm@freehaven.net>
12 *
13 * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
14 *
15 * Copyright (c) 1993
16 * The Regents of the University of California. All rights reserved.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 3. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * SUCH DAMAGE.
41 */
42
43 #ifdef HAVE_CONFIG_H
44 #include "config.h"
45 #endif
46
47 #ifdef WIN32
48 #define WIN32_LEAN_AND_MEAN
49 #include <windows.h>
50 #undef WIN32_LEAN_AND_MEAN
51 #endif
52 #include <sys/types.h>
53 #ifdef HAVE_SYS_TIME_H
54 #include <sys/time.h>
55 #else
56 #include <sys/_libevent_time.h>
57 #endif
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <stdarg.h>
61 #include <string.h>
62 #include <errno.h>
63 #include "event.h"
64
65 #include "log.h"
66 #include "evutil.h"
67
68 __RCSID("$MirOS: src/lib/libevent/log.c,v 1.4 2013/10/31 20:06:30 tg Exp $");
69 __RCSID(_LOG_H_);
70
71 static void _warn_helper(int severity, int log_errno, const char *fmt,
72 va_list ap)
73 __attribute__((__format__(__printf__, 3, 0)));
74 static void event_log(int severity, const char *msg);
75
76 void
event_err(int eval,const char * fmt,...)77 event_err(int eval, const char *fmt, ...)
78 {
79 va_list ap;
80
81 va_start(ap, fmt);
82 _warn_helper(_EVENT_LOG_ERR, errno, fmt, ap);
83 va_end(ap);
84 exit(eval);
85 }
86
87 void
event_warn(const char * fmt,...)88 event_warn(const char *fmt, ...)
89 {
90 va_list ap;
91
92 va_start(ap, fmt);
93 _warn_helper(_EVENT_LOG_WARN, errno, fmt, ap);
94 va_end(ap);
95 }
96
97 void
event_errx(int eval,const char * fmt,...)98 event_errx(int eval, const char *fmt, ...)
99 {
100 va_list ap;
101
102 va_start(ap, fmt);
103 _warn_helper(_EVENT_LOG_ERR, -1, fmt, ap);
104 va_end(ap);
105 exit(eval);
106 }
107
108 void
event_warnx(const char * fmt,...)109 event_warnx(const char *fmt, ...)
110 {
111 va_list ap;
112
113 va_start(ap, fmt);
114 _warn_helper(_EVENT_LOG_WARN, -1, fmt, ap);
115 va_end(ap);
116 }
117
118 void
event_msgx(const char * fmt,...)119 event_msgx(const char *fmt, ...)
120 {
121 va_list ap;
122
123 va_start(ap, fmt);
124 _warn_helper(_EVENT_LOG_MSG, -1, fmt, ap);
125 va_end(ap);
126 }
127
128 void
_event_debugx(const char * fmt,...)129 _event_debugx(const char *fmt, ...)
130 {
131 va_list ap;
132
133 va_start(ap, fmt);
134 _warn_helper(_EVENT_LOG_DEBUG, -1, fmt, ap);
135 va_end(ap);
136 }
137
138 static void
_warn_helper(int severity,int log_errno,const char * fmt,va_list ap)139 _warn_helper(int severity, int log_errno, const char *fmt, va_list ap)
140 {
141 char buf[1024];
142 size_t len;
143
144 if (fmt != NULL)
145 evutil_vsnprintf(buf, sizeof(buf), fmt, ap);
146 else
147 buf[0] = '\0';
148
149 if (log_errno >= 0) {
150 len = strlen(buf);
151 if (len < sizeof(buf) - 3) {
152 evutil_snprintf(buf + len, sizeof(buf) - len, ": %s",
153 strerror(log_errno));
154 }
155 }
156
157 event_log(severity, buf);
158 }
159
160 static event_log_cb log_fn = NULL;
161
162 void
event_set_log_callback(event_log_cb cb)163 event_set_log_callback(event_log_cb cb)
164 {
165 log_fn = cb;
166 }
167
168 static void
event_log(int severity,const char * msg)169 event_log(int severity, const char *msg)
170 {
171 if (log_fn)
172 log_fn(severity, msg);
173 else {
174 const char *severity_str;
175 switch (severity) {
176 case _EVENT_LOG_DEBUG:
177 severity_str = "debug";
178 break;
179 case _EVENT_LOG_MSG:
180 severity_str = "msg";
181 break;
182 case _EVENT_LOG_WARN:
183 severity_str = "warn";
184 break;
185 case _EVENT_LOG_ERR:
186 severity_str = "err";
187 break;
188 default:
189 severity_str = "???";
190 break;
191 }
192 (void)fprintf(stderr, "[%s] %s\n", severity_str, msg);
193 }
194 }
195