badsect.c revision 1.7
1/* 2 * Copyright (c) 1981, 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35static char copyright[] = 36"@(#) Copyright (c) 1981, 1983, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41/*static char sccsid[] = "from: @(#)badsect.c 8.1 (Berkeley) 6/5/93";*/ 42static char *rcsid = "$Id: badsect.c,v 1.7 1994/06/11 07:50:45 mycroft Exp $"; 43#endif /* not lint */ 44 45/* 46 * badsect 47 * 48 * Badsect takes a list of file-system relative sector numbers 49 * and makes files containing the blocks of which these sectors are a part. 50 * It can be used to contain sectors which have problems if these sectors 51 * are not part of the bad file for the pack (see bad144). For instance, 52 * this program can be used if the driver for the file system in question 53 * does not support bad block forwarding. 54 */ 55#include <sys/param.h> 56#include <sys/dir.h> 57#include <sys/stat.h> 58 59#include <ufs/ffs/fs.h> 60#include <ufs/ufs/dinode.h> 61 62#include <fcntl.h> 63#include <paths.h> 64#include <stdio.h> 65#include <stdlib.h> 66#include <unistd.h> 67 68union { 69 struct fs fs; 70 char fsx[SBSIZE]; 71} ufs; 72#define sblock ufs.fs 73union { 74 struct cg cg; 75 char cgx[MAXBSIZE]; 76} ucg; 77#define acg ucg.cg 78struct fs *fs; 79int fso, fsi; 80int errs; 81long dev_bsize = 1; 82 83char buf[MAXBSIZE]; 84 85void rdfs __P((daddr_t, int, char *)); 86int chkuse __P((daddr_t, int)); 87 88int 89main(argc, argv) 90 int argc; 91 char *argv[]; 92{ 93 daddr_t number; 94 struct stat stbuf, devstat; 95 register struct direct *dp; 96 DIR *dirp; 97 char name[BUFSIZ]; 98 99 if (argc < 3) { 100 fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n"); 101 exit(1); 102 } 103 if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) { 104 perror(argv[1]); 105 exit(2); 106 } 107 strcpy(name, _PATH_DEV); 108 if ((dirp = opendir(name)) == NULL) { 109 perror(name); 110 exit(3); 111 } 112 while ((dp = readdir(dirp)) != NULL) { 113 strcpy(&name[5], dp->d_name); 114 if (stat(name, &devstat) < 0) { 115 perror(name); 116 exit(4); 117 } 118 if (stbuf.st_dev == devstat.st_rdev && 119 (devstat.st_mode & IFMT) == IFBLK) 120 break; 121 } 122 closedir(dirp); 123 if (dp == NULL) { 124 printf("Cannot find dev 0%o corresponding to %s\n", 125 stbuf.st_rdev, argv[1]); 126 exit(5); 127 } 128 if ((fsi = open(name, 0)) < 0) { 129 perror(name); 130 exit(6); 131 } 132 fs = &sblock; 133 rdfs(SBOFF, SBSIZE, (char *)fs); 134 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 135 for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { 136 number = atoi(*argv); 137 if (chkuse(number, 1)) 138 continue; 139 if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) { 140 perror(*argv); 141 errs++; 142 } 143 } 144 printf("Don't forget to run ``fsck %s''\n", name); 145 exit(errs); 146} 147 148int 149chkuse(blkno, cnt) 150 daddr_t blkno; 151 int cnt; 152{ 153 int cg; 154 daddr_t fsbn, bn; 155 156 fsbn = dbtofsb(fs, blkno); 157 if ((unsigned)(fsbn+cnt) > fs->fs_size) { 158 printf("block %d out of range of file system\n", blkno); 159 return (1); 160 } 161 cg = dtog(fs, fsbn); 162 if (fsbn < cgdmin(fs, cg)) { 163 if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { 164 printf("block %d in non-data area: cannot attach\n", 165 blkno); 166 return (1); 167 } 168 } else { 169 if ((fsbn+cnt) > cgbase(fs, cg+1)) { 170 printf("block %d in non-data area: cannot attach\n", 171 blkno); 172 return (1); 173 } 174 } 175 rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, 176 (char *)&acg); 177 if (!cg_chkmagic(&acg)) { 178 fprintf(stderr, "cg %d: bad magic number\n", cg); 179 errs++; 180 return (1); 181 } 182 bn = dtogd(fs, fsbn); 183 if (isclr(cg_blksfree(&acg), bn)) 184 printf("Warning: sector %d is in use\n", blkno); 185 return (0); 186} 187 188/* 189 * read a block from the file system 190 */ 191void 192rdfs(bno, size, bf) 193 daddr_t bno; 194 int size; 195 char *bf; 196{ 197 int n; 198 199 if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) { 200 printf("seek error: %ld\n", bno); 201 perror("rdfs"); 202 exit(1); 203 } 204 n = read(fsi, bf, size); 205 if (n != size) { 206 printf("read error: %ld\n", bno); 207 perror("rdfs"); 208 exit(1); 209 } 210} 211