1*326b2259Sagc /* $NetBSD: testdb.c,v 1.10 2003/08/07 11:25:23 agc Exp $ */
263488d73Sthorpej
3ec1b7778Spk /*-
4ec1b7778Spk * Copyright (c) 1992, 1993
5ec1b7778Spk * The Regents of the University of California. All rights reserved.
6ec1b7778Spk *
7ec1b7778Spk * Redistribution and use in source and binary forms, with or without
8ec1b7778Spk * modification, are permitted provided that the following conditions
9ec1b7778Spk * are met:
10ec1b7778Spk * 1. Redistributions of source code must retain the above copyright
11ec1b7778Spk * notice, this list of conditions and the following disclaimer.
12ec1b7778Spk * 2. Redistributions in binary form must reproduce the above copyright
13ec1b7778Spk * notice, this list of conditions and the following disclaimer in the
14ec1b7778Spk * documentation and/or other materials provided with the distribution.
15*326b2259Sagc * 3. Neither the name of the University nor the names of its contributors
16ec1b7778Spk * may be used to endorse or promote products derived from this software
17ec1b7778Spk * without specific prior written permission.
18ec1b7778Spk *
19ec1b7778Spk * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20ec1b7778Spk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21ec1b7778Spk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22ec1b7778Spk * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23ec1b7778Spk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24ec1b7778Spk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25ec1b7778Spk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26ec1b7778Spk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27ec1b7778Spk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28ec1b7778Spk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29ec1b7778Spk * SUCH DAMAGE.
30ec1b7778Spk */
31ec1b7778Spk
32e5436d32Slukem #include <sys/cdefs.h>
33ec1b7778Spk #ifndef lint
3463488d73Sthorpej #if 0
3563488d73Sthorpej static char sccsid[] = "from: @(#)testdb.c 8.1 (Berkeley) 6/6/93";
3663488d73Sthorpej #else
37*326b2259Sagc __RCSID("$NetBSD: testdb.c,v 1.10 2003/08/07 11:25:23 agc Exp $");
3863488d73Sthorpej #endif
39ec1b7778Spk #endif /* not lint */
40ec1b7778Spk
41ec1b7778Spk #include <sys/param.h>
42ec1b7778Spk #include <sys/file.h>
431af40d9cSmsaitoh #include <sys/sysctl.h>
441af40d9cSmsaitoh #include <err.h>
45ec1b7778Spk #include <errno.h>
46ec1b7778Spk #include <limits.h>
47ec1b7778Spk #include <kvm.h>
48ec1b7778Spk #include <db.h>
49ec1b7778Spk #include <stdio.h>
501af40d9cSmsaitoh #include <stdlib.h>
51ec1b7778Spk #include <unistd.h>
52ec1b7778Spk #include <string.h>
53ec1b7778Spk #include <paths.h>
54ec1b7778Spk
55ec1b7778Spk #include "extern.h"
56ec1b7778Spk
57ec1b7778Spk /* Return true if the db file is valid, else false */
58ec1b7778Spk int
testdb()59ec1b7778Spk testdb()
60ec1b7778Spk {
61c9fcc328Slukem DB *db;
6240c743b2Sragge int ret, dbversionlen;
63ec1b7778Spk DBT rec;
643b6f768eScgd char dbversion[_POSIX2_LINE_MAX];
651af40d9cSmsaitoh char *kversion;
661af40d9cSmsaitoh int mib[2];
671af40d9cSmsaitoh size_t size;
68ec1b7778Spk
69ec1b7778Spk ret = 0;
70ec1b7778Spk db = NULL;
71ec1b7778Spk
723b6f768eScgd if ((db = dbopen(_PATH_KVMDB, O_RDONLY, 0, DB_HASH, NULL)) == NULL)
73ec1b7778Spk goto close;
74ec1b7778Spk
75ec1b7778Spk /* Read the version out of the database */
76ec1b7778Spk rec.data = VRS_KEY;
77ec1b7778Spk rec.size = sizeof(VRS_KEY) - 1;
78ec1b7778Spk if ((db->get)(db, &rec, &rec, 0))
79ec1b7778Spk goto close;
8035b9d065Smikel if (rec.data == 0 || rec.size == 0 || rec.size > sizeof(dbversion))
81ec1b7778Spk goto close;
82c9fcc328Slukem memmove(dbversion, rec.data, rec.size);
83ec1b7778Spk dbversionlen = rec.size;
84ec1b7778Spk
85ec1b7778Spk /* Read version string from kernel memory */
861af40d9cSmsaitoh mib[0] = CTL_KERN;
871af40d9cSmsaitoh mib[1] = KERN_VERSION;
881af40d9cSmsaitoh if (sysctl(mib, 2, NULL, &size, NULL, 0) == -1)
891af40d9cSmsaitoh errx(1, "can't get size of kernel version string");
901af40d9cSmsaitoh
911af40d9cSmsaitoh if ((kversion = malloc(size)) == NULL)
921af40d9cSmsaitoh err(1, "couldn't allocate space for buffer data");
931af40d9cSmsaitoh
941af40d9cSmsaitoh if (sysctl(mib, 2, kversion, &size, NULL, 0) == -1)
951af40d9cSmsaitoh errx(1, "can't get kernel version string");
96ec1b7778Spk
97ec1b7778Spk /* If they match, we win */
98c9fcc328Slukem ret = memcmp(dbversion, kversion, dbversionlen) == 0;
99ec1b7778Spk
10040c743b2Sragge close: if (db)
101ec1b7778Spk (void)(db->close)(db);
102ec1b7778Spk return (ret);
103ec1b7778Spk }
104