1 1.10 agc /* $NetBSD: testdb.c,v 1.10 2003/08/07 11:25:23 agc Exp $ */ 2 1.3 thorpej 3 1.1 pk /*- 4 1.1 pk * Copyright (c) 1992, 1993 5 1.1 pk * The Regents of the University of California. All rights reserved. 6 1.1 pk * 7 1.1 pk * Redistribution and use in source and binary forms, with or without 8 1.1 pk * modification, are permitted provided that the following conditions 9 1.1 pk * are met: 10 1.1 pk * 1. Redistributions of source code must retain the above copyright 11 1.1 pk * notice, this list of conditions and the following disclaimer. 12 1.1 pk * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 pk * notice, this list of conditions and the following disclaimer in the 14 1.1 pk * documentation and/or other materials provided with the distribution. 15 1.10 agc * 3. Neither the name of the University nor the names of its contributors 16 1.1 pk * may be used to endorse or promote products derived from this software 17 1.1 pk * without specific prior written permission. 18 1.1 pk * 19 1.1 pk * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 1.1 pk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 1.1 pk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 1.1 pk * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 1.1 pk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 1.1 pk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 1.1 pk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 1.1 pk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 1.1 pk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 1.1 pk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 1.1 pk * SUCH DAMAGE. 30 1.1 pk */ 31 1.1 pk 32 1.6 lukem #include <sys/cdefs.h> 33 1.1 pk #ifndef lint 34 1.3 thorpej #if 0 35 1.3 thorpej static char sccsid[] = "from: @(#)testdb.c 8.1 (Berkeley) 6/6/93"; 36 1.3 thorpej #else 37 1.10 agc __RCSID("$NetBSD: testdb.c,v 1.10 2003/08/07 11:25:23 agc Exp $"); 38 1.3 thorpej #endif 39 1.1 pk #endif /* not lint */ 40 1.1 pk 41 1.1 pk #include <sys/param.h> 42 1.1 pk #include <sys/file.h> 43 1.8 msaitoh #include <sys/sysctl.h> 44 1.8 msaitoh #include <err.h> 45 1.1 pk #include <errno.h> 46 1.1 pk #include <limits.h> 47 1.1 pk #include <kvm.h> 48 1.1 pk #include <db.h> 49 1.1 pk #include <stdio.h> 50 1.8 msaitoh #include <stdlib.h> 51 1.1 pk #include <unistd.h> 52 1.1 pk #include <string.h> 53 1.1 pk #include <paths.h> 54 1.1 pk 55 1.1 pk #include "extern.h" 56 1.1 pk 57 1.1 pk /* Return true if the db file is valid, else false */ 58 1.1 pk int 59 1.1 pk testdb() 60 1.1 pk { 61 1.7 lukem DB *db; 62 1.9 ragge int ret, dbversionlen; 63 1.1 pk DBT rec; 64 1.4 cgd char dbversion[_POSIX2_LINE_MAX]; 65 1.8 msaitoh char *kversion; 66 1.8 msaitoh int mib[2]; 67 1.8 msaitoh size_t size; 68 1.1 pk 69 1.1 pk ret = 0; 70 1.1 pk db = NULL; 71 1.1 pk 72 1.4 cgd if ((db = dbopen(_PATH_KVMDB, O_RDONLY, 0, DB_HASH, NULL)) == NULL) 73 1.1 pk goto close; 74 1.1 pk 75 1.1 pk /* Read the version out of the database */ 76 1.1 pk rec.data = VRS_KEY; 77 1.1 pk rec.size = sizeof(VRS_KEY) - 1; 78 1.1 pk if ((db->get)(db, &rec, &rec, 0)) 79 1.1 pk goto close; 80 1.5 mikel if (rec.data == 0 || rec.size == 0 || rec.size > sizeof(dbversion)) 81 1.1 pk goto close; 82 1.7 lukem memmove(dbversion, rec.data, rec.size); 83 1.1 pk dbversionlen = rec.size; 84 1.1 pk 85 1.1 pk /* Read version string from kernel memory */ 86 1.8 msaitoh mib[0] = CTL_KERN; 87 1.8 msaitoh mib[1] = KERN_VERSION; 88 1.8 msaitoh if (sysctl(mib, 2, NULL, &size, NULL, 0) == -1) 89 1.8 msaitoh errx(1, "can't get size of kernel version string"); 90 1.8 msaitoh 91 1.8 msaitoh if ((kversion = malloc(size)) == NULL) 92 1.8 msaitoh err(1, "couldn't allocate space for buffer data"); 93 1.8 msaitoh 94 1.8 msaitoh if (sysctl(mib, 2, kversion, &size, NULL, 0) == -1) 95 1.8 msaitoh errx(1, "can't get kernel version string"); 96 1.1 pk 97 1.1 pk /* If they match, we win */ 98 1.7 lukem ret = memcmp(dbversion, kversion, dbversionlen) == 0; 99 1.1 pk 100 1.9 ragge close: if (db) 101 1.1 pk (void)(db->close)(db); 102 1.1 pk return (ret); 103 1.1 pk } 104
Indexes created Sat Sep 20 22:09:52 GMT 2025