1 /* $OpenBSD: log.c,v 1.12 2015/12/11 18:49:39 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 (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 #include <sys/types.h>
41 #include <sys/time.h>
42
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <stdarg.h>
46 #include <string.h>
47 #include <errno.h>
48
49 #include "event.h"
50 #include "log.h"
51
52 static void _warn_helper(int severity, int log_errno, const char *fmt,
53 va_list ap);
54 static void event_log(int severity, const char *msg);
55
56 void
event_err(int eval,const char * fmt,...)57 event_err(int eval, const char *fmt, ...)
58 {
59 va_list ap;
60
61 va_start(ap, fmt);
62 _warn_helper(_EVENT_LOG_ERR, errno, fmt, ap);
63 va_end(ap);
64 exit(eval);
65 }
66
67 void
event_warn(const char * fmt,...)68 event_warn(const char *fmt, ...)
69 {
70 va_list ap;
71
72 va_start(ap, fmt);
73 _warn_helper(_EVENT_LOG_WARN, errno, fmt, ap);
74 va_end(ap);
75 }
76
77 void
event_errx(int eval,const char * fmt,...)78 event_errx(int eval, const char *fmt, ...)
79 {
80 va_list ap;
81
82 va_start(ap, fmt);
83 _warn_helper(_EVENT_LOG_ERR, -1, fmt, ap);
84 va_end(ap);
85 exit(eval);
86 }
87
88 void
event_warnx(const char * fmt,...)89 event_warnx(const char *fmt, ...)
90 {
91 va_list ap;
92
93 va_start(ap, fmt);
94 _warn_helper(_EVENT_LOG_WARN, -1, fmt, ap);
95 va_end(ap);
96 }
97
98 void
event_msgx(const char * fmt,...)99 event_msgx(const char *fmt, ...)
100 {
101 va_list ap;
102
103 va_start(ap, fmt);
104 _warn_helper(_EVENT_LOG_MSG, -1, fmt, ap);
105 va_end(ap);
106 }
107
108 void
_event_debugx(const char * fmt,...)109 _event_debugx(const char *fmt, ...)
110 {
111 va_list ap;
112
113 va_start(ap, fmt);
114 _warn_helper(_EVENT_LOG_DEBUG, -1, fmt, ap);
115 va_end(ap);
116 }
117
118 static void
_warn_helper(int severity,int log_errno,const char * fmt,va_list ap)119 _warn_helper(int severity, int log_errno, const char *fmt, va_list ap)
120 {
121 char buf[1024];
122 size_t len;
123
124 if (fmt != NULL)
125 vsnprintf(buf, sizeof(buf), fmt, ap);
126 else
127 buf[0] = '\0';
128
129 if (log_errno >= 0) {
130 len = strlen(buf);
131 if (len < sizeof(buf) - 3) {
132 snprintf(buf + len, sizeof(buf) - len, ": %s",
133 strerror(log_errno));
134 }
135 }
136
137 event_log(severity, buf);
138 }
139
140 static event_log_cb log_fn = NULL;
141
142 void
event_set_log_callback(event_log_cb cb)143 event_set_log_callback(event_log_cb cb)
144 {
145 log_fn = cb;
146 }
147
148 static void
event_log(int severity,const char * msg)149 event_log(int severity, const char *msg)
150 {
151 if (log_fn)
152 log_fn(severity, msg);
153 }
154