/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

#include "mt.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>

#define VSTR    "# VERSION="


/*
 * check_version - check to make sure designated file is the correct version
 *              returns : 0 - version correct
 *                        1 - version incorrect
 *                        2 - could not open file
 *                        3 - corrupt file
 */


int
check_version(int ver, char *fname)
{
        FILE *fp;               /* file pointer for sactab */
        char line[BUFSIZ];      /* temp buffer for input */
        char *p;                /* working pointer */
        int version;            /* version number from sactab */

        if ((fp = fopen(fname, "rF")) == NULL)
                return (2);
        p = line;
        while (fgets(p, BUFSIZ, fp)) {
                if (strncmp(p, VSTR, strlen(VSTR)) == 0) {
                        p += strlen(VSTR);
                        if (*p)
                                version = atoi(p);
                        else
                                return (3);
                        (void) fclose(fp);
                        return ((version != ver) ? 1 : 0);
                }
                p = line;
        }
        return (3);
}