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
59static void _warn_helper(int severity, const char *errstr, const char *fmt,
60    va_list ap);
61static void event_log(int severity, const char *msg);
62static void event_exit(int errcode) EV_NORETURN;
63
64static event_fatal_cb fatal_fn = NULL;
65
66void
67event_set_fatal_callback(event_fatal_cb cb)
68{
69	fatal_fn = cb;
70}
71
72static void
73event_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
84void
85event_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
95void
96event_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
105void
106event_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
117void
118event_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
128void
129event_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
139void
140event_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
149void
150event_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
159void
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
169static 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
190static event_log_cb log_fn = NULL;
191
192void
193event_set_log_callback(event_log_cb cb)
194{
195	log_fn = cb;
196}
197
198static void
199event_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}
225