/*	$OpenBSD: errwarn.c,v 1.23 2016/02/06 19:30:52 krw Exp $	*/

/* Errors and warnings. */

/*
 * Copyright (c) 1996 The Internet Software Consortium.
 * All Rights Reserved.
 * Copyright (c) 1995 RadioMail Corporation.  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 RadioMail Corporation, the Internet Software
 *    Consortium 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 RADIOMAIL CORPORATION, THE INTERNET
 * SOFTWARE CONSORTIUM 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 RADIOMAIL CORPORATION 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.
 *
 * This software was written for RadioMail Corporation by Ted Lemon
 * under a contract with Vixie Enterprises.   Further modifications have
 * been made for the Internet Software Consortium under a contract
 * with Vixie Laboratories.
 */

#include <sys/queue.h>
#include <sys/socket.h>

#include <arpa/inet.h>

#include <net/if.h>

#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>

#include "dhcp.h"
#include "dhcpd.h"

static char mbuf[1024];

int warnings_occurred;

/*
 * Log an error message, then exit.
 */
void
error(char *fmt, ...)
{
	va_list list;

	va_start(list, fmt);
	vsnprintf(mbuf, sizeof(mbuf), fmt, list);
	va_end(list);

#ifndef DEBUG
	syslog(LOG_ERR, "%s", mbuf);
#endif

	/* Also log it to stderr? */
	if (log_perror) {
		write(STDERR_FILENO, mbuf, strlen(mbuf));
		write(STDERR_FILENO, "\n", 1);
	}

	if (log_perror) {
		fflush(stderr);
	}
	exit(1);
}

/*
 * Log a warning message.
 */
void
warning(char *fmt, ...)
{
	va_list list;

	va_start(list, fmt);
	vsnprintf(mbuf, sizeof(mbuf), fmt, list);
	va_end(list);

#ifndef DEBUG
	syslog(LOG_ERR, "%s", mbuf);
#endif

	if (log_perror) {
		write(STDERR_FILENO, mbuf, strlen(mbuf));
		write(STDERR_FILENO, "\n", 1);
	}
}

/*
 * Log a note.
 */
void
note(char *fmt, ...)
{
	va_list list;

	va_start(list, fmt);
	vsnprintf(mbuf, sizeof(mbuf), fmt, list);
	va_end(list);

#ifndef DEBUG
	syslog(LOG_INFO, "%s", mbuf);
#endif

	if (log_perror) {
		write(STDERR_FILENO, mbuf, strlen(mbuf));
		write(STDERR_FILENO, "\n", 1);
	}
}

#ifdef DEBUG
/*
 * Log a debug message.
 */
void
debug(char *fmt, ...)
{
	va_list list;

	va_start(list, fmt);
	vsnprintf(mbuf, sizeof(mbuf), fmt, list);
	va_end(list);

	syslog(LOG_DEBUG, "%s", mbuf);

	if (log_perror) {
		write(STDERR_FILENO, mbuf, strlen(mbuf));
		write(STDERR_FILENO, "\n", 1);
	}
}
#endif

void
parse_warn(char *msg)
{
	static char spaces[81];
	struct iovec iov[6];
	size_t iovcnt;
	int i;

	snprintf(mbuf, sizeof(mbuf), "%s line %d: %s", tlname, lexline, msg);

#ifndef DEBUG
	syslog(LOG_ERR, "%s", mbuf);
	syslog(LOG_ERR, "%s", token_line);
	if (lexchar < 81)
		syslog(LOG_ERR, "%*c", lexchar, '^');
#endif

	if (log_perror) {
		iov[0].iov_base = mbuf;
		iov[0].iov_len = strlen(mbuf);
		iov[1].iov_base = "\n";
		iov[1].iov_len = 1;
		iov[2].iov_base = token_line;
		iov[2].iov_len = strlen(token_line);
		iov[3].iov_base = "\n";
		iov[3].iov_len = 1;
		iovcnt = 4;
		if (lexchar < 81) {
			for (i = 0; i < lexchar; i++) {
				if (token_line[i] == '\t')
					spaces[i] = '\t';
				else
					spaces[i] = ' ';
			}
			iov[4].iov_base = spaces;
			iov[4].iov_len = lexchar - 1;
			iov[5].iov_base = "^\n";
			iov[5].iov_len = 2;
			iovcnt += 2;
		}
		writev(STDERR_FILENO, iov, iovcnt);
	}
	warnings_occurred = 1;
}