/***************************************************************************
 *
 * Copyright (c) 1999 Balázs Scheidler
 * Copyright (c) 1999-2001 BalaBit IT Ltd.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Inspired by nsyslog, originally written by Darren Reed.
 *
 * $Id: utils.c,v 1.4 2002/02/04 16:07:50 bazsi Exp $
 *
 ***************************************************************************/

#include "config.h"

#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <utmp.h>

#include "utils.h"

char *getshorthostname(char *buf, size_t bufsize)
{
        char *s;

        gethostname(buf, bufsize - 1);
        buf[bufsize - 1] = '\0';
        s = strchr(buf, '.');
        if (s != NULL)
		*s = '\0';
        return buf;
}

#ifndef HAVE_INET_ATON
int inet_aton(const char *cp, struct in_addr *addr)
{
	if (!strcmp(cp, "255.255.255.255")) {
		addr->s_addr = 0xFFFFFFFF;
		return 1;
	}
	addr->s_addr = inet_addr(cp);
	if (addr->s_addr == -1) 
		return 0;
	return 1;
}
#endif

#ifndef HAVE_GETUTENT

static int utent_fd = -1;

#ifndef _PATH_UTMP
#define _PATH_UTMP "/var/log/utmp"
#endif

struct utmp *getutent(void)
{
	static struct utmp ut;
	int rc;

	if (utent_fd == -1) {
		utent_fd = open(_PATH_UTMP, O_RDONLY | O_NOCTTY);
	}
	if (utent_fd == -1)
		return NULL;
	rc = read(utent_fd, &ut, sizeof(ut));
	if (rc <= 0) {
		close(utent_fd);
		utent_fd = -1;
		return NULL;
	}
	else {
		return &ut;
	}
}

void endutent(void)
{
	if (utent_fd != -1) {
		close(utent_fd);
		utent_fd = -1;
	}
}

#endif