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
65static void _warn_helper(int severity, int log_errno, const char *fmt,
66                         va_list ap);
67static void event_log(int severity, const char *msg);
68
69void
70event_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
80void
81event_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
90void
91event_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
101void
102event_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
111void
112event_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
121void
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
131static void
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
153static event_log_cb log_fn = NULL;
154
155void
156event_set_log_callback(event_log_cb cb)
157{
158	log_fn = cb;
159}
160
161static void
162event_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