michael@0: /*	$OpenBSD: err.c,v 1.2 2002/06/25 15:50:15 mickey Exp $	*/
michael@0: 
michael@0: /*
michael@0:  * log.c
michael@0:  *
michael@0:  * Based on err.c, which was adapted from OpenBSD libc *err* *warn* code.
michael@0:  *
michael@0:  * Copyright (c) 2005-2012 Niels Provos and Nick Mathewson
michael@0:  *
michael@0:  * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
michael@0:  *
michael@0:  * Copyright (c) 1993
michael@0:  *	The Regents of the University of California.  All rights reserved.
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 1. Redistributions of source code must retain the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer.
michael@0:  * 2. Redistributions in binary form must reproduce the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer in the
michael@0:  *    documentation and/or other materials provided with the distribution.
michael@0:  * 3. Neither the name of the University nor the names of its contributors
michael@0:  *    may be used to endorse or promote products derived from this software
michael@0:  *    without specific prior written permission.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
michael@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
michael@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
michael@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
michael@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
michael@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
michael@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
michael@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
michael@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
michael@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
michael@0:  * SUCH DAMAGE.
michael@0:  */
michael@0: 
michael@0: #include "event2/event-config.h"
michael@0: 
michael@0: #ifdef WIN32
michael@0: #include <winsock2.h>
michael@0: #define WIN32_LEAN_AND_MEAN
michael@0: #include <windows.h>
michael@0: #undef WIN32_LEAN_AND_MEAN
michael@0: #endif
michael@0: #include <sys/types.h>
michael@0: #include <stdio.h>
michael@0: #include <stdlib.h>
michael@0: #include <stdarg.h>
michael@0: #include <string.h>
michael@0: #include <errno.h>
michael@0: #include "event2/event.h"
michael@0: #include "event2/util.h"
michael@0: 
michael@0: #include "log-internal.h"
michael@0: 
michael@0: static void _warn_helper(int severity, const char *errstr, const char *fmt,
michael@0:     va_list ap);
michael@0: static void event_log(int severity, const char *msg);
michael@0: static void event_exit(int errcode) EV_NORETURN;
michael@0: 
michael@0: static event_fatal_cb fatal_fn = NULL;
michael@0: 
michael@0: void
michael@0: event_set_fatal_callback(event_fatal_cb cb)
michael@0: {
michael@0: 	fatal_fn = cb;
michael@0: }
michael@0: 
michael@0: static void
michael@0: event_exit(int errcode)
michael@0: {
michael@0: 	if (fatal_fn) {
michael@0: 		fatal_fn(errcode);
michael@0: 		exit(errcode); /* should never be reached */
michael@0: 	} else if (errcode == _EVENT_ERR_ABORT)
michael@0: 		abort();
michael@0: 	else
michael@0: 		exit(errcode);
michael@0: }
michael@0: 
michael@0: void
michael@0: event_err(int eval, const char *fmt, ...)
michael@0: {
michael@0: 	va_list ap;
michael@0: 
michael@0: 	va_start(ap, fmt);
michael@0: 	_warn_helper(_EVENT_LOG_ERR, strerror(errno), fmt, ap);
michael@0: 	va_end(ap);
michael@0: 	event_exit(eval);
michael@0: }
michael@0: 
michael@0: void
michael@0: event_warn(const char *fmt, ...)
michael@0: {
michael@0: 	va_list ap;
michael@0: 
michael@0: 	va_start(ap, fmt);
michael@0: 	_warn_helper(_EVENT_LOG_WARN, strerror(errno), fmt, ap);
michael@0: 	va_end(ap);
michael@0: }
michael@0: 
michael@0: void
michael@0: event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...)
michael@0: {
michael@0: 	va_list ap;
michael@0: 	int err = evutil_socket_geterror(sock);
michael@0: 
michael@0: 	va_start(ap, fmt);
michael@0: 	_warn_helper(_EVENT_LOG_ERR, evutil_socket_error_to_string(err), fmt, ap);
michael@0: 	va_end(ap);
michael@0: 	event_exit(eval);
michael@0: }
michael@0: 
michael@0: void
michael@0: event_sock_warn(evutil_socket_t sock, const char *fmt, ...)
michael@0: {
michael@0: 	va_list ap;
michael@0: 	int err = evutil_socket_geterror(sock);
michael@0: 
michael@0: 	va_start(ap, fmt);
michael@0: 	_warn_helper(_EVENT_LOG_WARN, evutil_socket_error_to_string(err), fmt, ap);
michael@0: 	va_end(ap);
michael@0: }
michael@0: 
michael@0: void
michael@0: event_errx(int eval, const char *fmt, ...)
michael@0: {
michael@0: 	va_list ap;
michael@0: 
michael@0: 	va_start(ap, fmt);
michael@0: 	_warn_helper(_EVENT_LOG_ERR, NULL, fmt, ap);
michael@0: 	va_end(ap);
michael@0: 	event_exit(eval);
michael@0: }
michael@0: 
michael@0: void
michael@0: event_warnx(const char *fmt, ...)
michael@0: {
michael@0: 	va_list ap;
michael@0: 
michael@0: 	va_start(ap, fmt);
michael@0: 	_warn_helper(_EVENT_LOG_WARN, NULL, fmt, ap);
michael@0: 	va_end(ap);
michael@0: }
michael@0: 
michael@0: void
michael@0: event_msgx(const char *fmt, ...)
michael@0: {
michael@0: 	va_list ap;
michael@0: 
michael@0: 	va_start(ap, fmt);
michael@0: 	_warn_helper(_EVENT_LOG_MSG, NULL, fmt, ap);
michael@0: 	va_end(ap);
michael@0: }
michael@0: 
michael@0: void
michael@0: _event_debugx(const char *fmt, ...)
michael@0: {
michael@0: 	va_list ap;
michael@0: 
michael@0: 	va_start(ap, fmt);
michael@0: 	_warn_helper(_EVENT_LOG_DEBUG, NULL, fmt, ap);
michael@0: 	va_end(ap);
michael@0: }
michael@0: 
michael@0: static void
michael@0: _warn_helper(int severity, const char *errstr, const char *fmt, va_list ap)
michael@0: {
michael@0: 	char buf[1024];
michael@0: 	size_t len;
michael@0: 
michael@0: 	if (fmt != NULL)
michael@0: 		evutil_vsnprintf(buf, sizeof(buf), fmt, ap);
michael@0: 	else
michael@0: 		buf[0] = '\0';
michael@0: 
michael@0: 	if (errstr) {
michael@0: 		len = strlen(buf);
michael@0: 		if (len < sizeof(buf) - 3) {
michael@0: 			evutil_snprintf(buf + len, sizeof(buf) - len, ": %s", errstr);
michael@0: 		}
michael@0: 	}
michael@0: 
michael@0: 	event_log(severity, buf);
michael@0: }
michael@0: 
michael@0: static event_log_cb log_fn = NULL;
michael@0: 
michael@0: void
michael@0: event_set_log_callback(event_log_cb cb)
michael@0: {
michael@0: 	log_fn = cb;
michael@0: }
michael@0: 
michael@0: static void
michael@0: event_log(int severity, const char *msg)
michael@0: {
michael@0: 	if (log_fn)
michael@0: 		log_fn(severity, msg);
michael@0: 	else {
michael@0: 		const char *severity_str;
michael@0: 		switch (severity) {
michael@0: 		case _EVENT_LOG_DEBUG:
michael@0: 			severity_str = "debug";
michael@0: 			break;
michael@0: 		case _EVENT_LOG_MSG:
michael@0: 			severity_str = "msg";
michael@0: 			break;
michael@0: 		case _EVENT_LOG_WARN:
michael@0: 			severity_str = "warn";
michael@0: 			break;
michael@0: 		case _EVENT_LOG_ERR:
michael@0: 			severity_str = "err";
michael@0: 			break;
michael@0: 		default:
michael@0: 			severity_str = "???";
michael@0: 			break;
michael@0: 		}
michael@0: 		(void)fprintf(stderr, "[%s] %s\n", severity_str, msg);
michael@0: 	}
michael@0: }