/*	$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);

	}

}