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 /*	$OpenBSD: err.c,v 1.2 2002/06/25 15:50:15 mickey Exp $	*/

 /*

  * log.c

  *

  * Based on err.c, which was adapted from OpenBSD libc *err* *warn* code.

  *

  * Copyright (c) 2005-2012 Niels Provos and Nick Mathewson

  *

  * Copyright (c) 2000 Dug Song <dugsong@monkey.org>

  *

  * Copyright (c) 1993

  *	The Regents of the University of California.  All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met:

  * 1. Redistributions of source code must retain the above copyright

  *    notice, this list of conditions and the following disclaimer.

  * 2. Redistributions in binary form must reproduce the above copyright

  *    notice, this list of conditions and the following disclaimer in the

  *    documentation and/or other materials provided with the distribution.

  * 3. Neither the name of the University nor the names of its contributors

  *    may be used to endorse or promote products derived from this software

  *    without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

  * SUCH DAMAGE.

  */

 #include "event2/event-config.h"

 #ifdef WIN32

 #include <winsock2.h>

 #define WIN32_LEAN_AND_MEAN

 #include <windows.h>

 #undef WIN32_LEAN_AND_MEAN

 #endif

 #include <sys/types.h>

 #include <stdio.h>

 #include <stdlib.h>

 #include <stdarg.h>

 #include <string.h>

 #include <errno.h>

 #include "event2/event.h"

 #include "event2/util.h"

 #include "log-internal.h"

 static void _warn_helper(int severity, const char *errstr, const char *fmt,

     va_list ap);

 static void event_log(int severity, const char *msg);

 static void event_exit(int errcode) EV_NORETURN;

 static event_fatal_cb fatal_fn = NULL;

 void

 event_set_fatal_callback(event_fatal_cb cb)

 {

 	fatal_fn = cb;

 }

 static void

 event_exit(int errcode)

 {

 	if (fatal_fn) {

 		fatal_fn(errcode);

 		exit(errcode); /* should never be reached */

 	} else if (errcode == _EVENT_ERR_ABORT)

 		abort();

 	else

 		exit(errcode);

 }

 void

 event_err(int eval, const char *fmt, ...)

 {

 	va_list ap;

 	va_start(ap, fmt);

 	_warn_helper(_EVENT_LOG_ERR, strerror(errno), fmt, ap);

 	va_end(ap);

 	event_exit(eval);

 }

 void

 event_warn(const char *fmt, ...)

 {

 	va_list ap;

 	va_start(ap, fmt);

 	_warn_helper(_EVENT_LOG_WARN, strerror(errno), fmt, ap);

 	va_end(ap);

 }

 void

 event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...)

 {

 	va_list ap;

 	int err = evutil_socket_geterror(sock);

 	va_start(ap, fmt);

 	_warn_helper(_EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap);

 	va_end(ap);

 	event_exit(eval);

 }

 void

 event_sock_warn(evutil_socket_t sock, const char *fmt, ...)

 {

 	va_list ap;

 	int err = evutil_socket_geterror(sock);

 	va_start(ap, fmt);

 	_warn_helper(_EVENT_LOG_WARN, evutil_socket_error_to_string(err), fmt, ap);

 	va_end(ap);

 }

 void

 event_errx(int eval, const char *fmt, ...)

 {

 	va_list ap;

 	va_start(ap, fmt);

 	_warn_helper(_EVENT_LOG_ERR, NULL, fmt, ap);

 	va_end(ap);

 	event_exit(eval);

 }

 void

 event_warnx(const char *fmt, ...)

 {

 	va_list ap;

 	va_start(ap, fmt);

 	_warn_helper(_EVENT_LOG_WARN, NULL, fmt, ap);

 	va_end(ap);

 }

 void

 event_msgx(const char *fmt, ...)

 {

 	va_list ap;

 	va_start(ap, fmt);

 	_warn_helper(_EVENT_LOG_MSG, NULL, fmt, ap);

 	va_end(ap);

 }

 void

 _event_debugx(const char *fmt, ...)

 {

 	va_list ap;

 	va_start(ap, fmt);

 	_warn_helper(_EVENT_LOG_DEBUG, NULL, fmt, ap);

 	va_end(ap);

 }

 static void

 _warn_helper(int severity, const char *errstr, const char *fmt, va_list ap)

 {

 	char buf[1024];

 	size_t len;

 	if (fmt != NULL)

 		evutil_vsnprintf(buf, sizeof(buf), fmt, ap);

 	else

 		buf[0] = '\0';

 	if (errstr) {

 		len = strlen(buf);

 		if (len < sizeof(buf) - 3) {

 			evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr);

 		}

 	}

 	event_log(severity, buf);

 }

 static event_log_cb log_fn = NULL;

 void

 event_set_log_callback(event_log_cb cb)

 {

 	log_fn = cb;

 }

 static void

 event_log(int severity, const char *msg)

 {

 	if (log_fn)

 		log_fn(severity, msg);

 	else {

 		const char *severity_str;

 		switch (severity) {

 		case _EVENT_LOG_DEBUG:

 			severity_str = "debug";

 			break;

 		case _EVENT_LOG_MSG:

 			severity_str = "msg";

 			break;

 		case _EVENT_LOG_WARN:

 			severity_str = "warn";

 			break;

 		case _EVENT_LOG_ERR:

 			severity_str = "err";

 			break;

 		default:

 			severity_str = "???";

 			break;

 		}

 		(void)fprintf(stderr, "[%s] %s\n", severity_str, msg);

 	}

 }