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#include "evconfig-private.h"
42
43#ifdef _WIN32
44#include <winsock2.h>
45#define WIN32_LEAN_AND_MEAN
46#include <windows.h>
47#undef WIN32_LEAN_AND_MEAN
48#endif
49#include <sys/types.h>
50#include <stdio.h>
51#include <stdlib.h>
52#include <stdarg.h>
53#include <string.h>
54#include <errno.h>
55#include "event2/event.h"
56#include "event2/util.h"
57
58#include "log-internal.h"
59
60static void event_log(int severity, const char *msg);
61static void event_exit(int errcode) EV_NORETURN;
62
63static event_fatal_cb fatal_fn = NULL;
64
65#ifdef EVENT_DEBUG_LOGGING_ENABLED
66#ifdef USE_DEBUG
67#define DEFAULT_MASK EVENT_DBG_ALL
68#else
69#define DEFAULT_MASK 0
70#endif
71
72EVENT2_EXPORT_SYMBOL ev_uint32_t event_debug_logging_mask_ = DEFAULT_MASK;
73#endif /* EVENT_DEBUG_LOGGING_ENABLED */
74
75void
76event_enable_debug_logging(ev_uint32_t which)
77{
78#ifdef EVENT_DEBUG_LOGGING_ENABLED
79	event_debug_logging_mask_ = which;
80#endif
81}
82
83void
84event_set_fatal_callback(event_fatal_cb cb)
85{
86	fatal_fn = cb;
87}
88
89static void
90event_exit(int errcode)
91{
92	if (fatal_fn) {
93		fatal_fn(errcode);
94		exit(errcode); /* should never be reached */
95	} else if (errcode == EVENT_ERR_ABORT_)
96		abort();
97	else
98		exit(errcode);
99}
100
101void
102event_err(int eval, const char *fmt, ...)
103{
104	va_list ap;
105
106	va_start(ap, fmt);
107	event_logv_(EVENT_LOG_ERR, strerror(errno), fmt, ap);
108	va_end(ap);
109	event_exit(eval);
110}
111
112void
113event_warn(const char *fmt, ...)
114{
115	va_list ap;
116
117	va_start(ap, fmt);
118	event_logv_(EVENT_LOG_WARN, strerror(errno), fmt, ap);
119	va_end(ap);
120}
121
122void
123event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...)
124{
125	va_list ap;
126	int err = evutil_socket_geterror(sock);
127
128	va_start(ap, fmt);
129	event_logv_(EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap);
130	va_end(ap);
131	event_exit(eval);
132}
133
134void
135event_sock_warn(evutil_socket_t sock, const char *fmt, ...)
136{
137	va_list ap;
138	int err = evutil_socket_geterror(sock);
139
140	va_start(ap, fmt);
141	event_logv_(EVENT_LOG_WARN, evutil_socket_error_to_string(err), fmt, ap);
142	va_end(ap);
143}
144
145void
146event_errx(int eval, const char *fmt, ...)
147{
148	va_list ap;
149
150	va_start(ap, fmt);
151	event_logv_(EVENT_LOG_ERR, NULL, fmt, ap);
152	va_end(ap);
153	event_exit(eval);
154}
155
156void
157event_warnx(const char *fmt, ...)
158{
159	va_list ap;
160
161	va_start(ap, fmt);
162	event_logv_(EVENT_LOG_WARN, NULL, fmt, ap);
163	va_end(ap);
164}
165
166void
167event_msgx(const char *fmt, ...)
168{
169	va_list ap;
170
171	va_start(ap, fmt);
172	event_logv_(EVENT_LOG_MSG, NULL, fmt, ap);
173	va_end(ap);
174}
175
176void
177event_debugx_(const char *fmt, ...)
178{
179	va_list ap;
180
181	va_start(ap, fmt);
182	event_logv_(EVENT_LOG_DEBUG, NULL, fmt, ap);
183	va_end(ap);
184}
185
186void
187event_logv_(int severity, const char *errstr, const char *fmt, va_list ap)
188{
189	char buf[1024];
190	size_t len;
191
192	if (severity == EVENT_LOG_DEBUG && !event_debug_get_logging_mask_())
193		return;
194
195	if (fmt != NULL)
196		evutil_vsnprintf(buf, sizeof(buf), fmt, ap);
197	else
198		buf[0] = '\0';
199
200	if (errstr) {
201		len = strlen(buf);
202		if (len < sizeof(buf) - 3) {
203			evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr);
204		}
205	}
206
207	event_log(severity, buf);
208}
209
210static event_log_cb log_fn = NULL;
211
212void
213event_set_log_callback(event_log_cb cb)
214{
215	log_fn = cb;
216}
217
218static void
219event_log(int severity, const char *msg)
220{
221	if (log_fn)
222		log_fn(severity, msg);
223	else {
224		const char *severity_str;
225		switch (severity) {
226		case EVENT_LOG_DEBUG:
227			severity_str = "debug";
228			break;
229		case EVENT_LOG_MSG:
230			severity_str = "msg";
231			break;
232		case EVENT_LOG_WARN:
233			severity_str = "warn";
234			break;
235		case EVENT_LOG_ERR:
236			severity_str = "err";
237			break;
238		default:
239			severity_str = "???";
240			break;
241		}
242		(void)fprintf(stderr, "[%s] %s\n", severity_str, msg);
243	}
244}
245