checkver.c revision 1219:f89f56c2d9ac 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23/*
24 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
25 * Use is subject to license terms.
26 */
27
28/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
29/*	  All Rights Reserved  	*/
30
31#pragma ident	"%Z%%M%	%I%	%E% SMI"
32
33#include "mt.h"
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <sys/types.h>
38
39#define	VSTR	"# VERSION="
40
41
42/*
43 * check_version - check to make sure designated file is the correct version
44 *		returns : 0 - version correct
45 *			  1 - version incorrect
46 *			  2 - could not open file
47 *			  3 - corrupt file
48 */
49
50
51int
52check_version(int ver, char *fname)
53{
54	FILE *fp;		/* file pointer for sactab */
55	char line[BUFSIZ];	/* temp buffer for input */
56	char *p;		/* working pointer */
57	int version;		/* version number from sactab */
58
59	if ((fp = fopen(fname, "r")) == NULL)
60		return (2);
61	p = line;
62	while (fgets(p, BUFSIZ, fp)) {
63		if (strncmp(p, VSTR, strlen(VSTR)) == 0) {
64			p += strlen(VSTR);
65			if (*p)
66				version = atoi(p);
67			else
68				return (3);
69			(void) fclose(fp);
70			return ((version != ver) ? 1 : 0);
71		}
72		p = line;
73	}
74	return (3);
75}
76