badsect.c revision 1.5
1/* 2 * Copyright (c) 1981, 1983 The Regents of the University of California. 3 * 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 35char copyright[] = 36"@(#) Copyright (c) 1981, 1983 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41/*static char sccsid[] = "from: @(#)badsect.c 5.9 (Berkeley) 6/1/90";*/ 42static char rcsid[] = "$Id: badsect.c,v 1.5 1993/12/15 17:01:36 jtc 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/stat.h> 57#include <dirent.h> 58#include <ufs/fs.h> 59#include <ufs/dinode.h> 60#include <stdio.h> 61#include <paths.h> 62 63union { 64 struct fs fs; 65 char fsx[SBSIZE]; 66} ufs; 67#define sblock ufs.fs 68union { 69 struct cg cg; 70 char cgx[MAXBSIZE]; 71} ucg; 72#define acg ucg.cg 73struct fs *fs; 74int fso, fsi; 75int errs; 76long dev_bsize = 1; 77 78char buf[MAXBSIZE]; 79 80 81main(argc, argv) 82 int argc; 83 char *argv[]; 84{ 85 daddr_t number; 86 struct stat stbuf, devstat; 87 register struct dirent *dp; 88 DIR *dirp; 89 int fd; 90 char name[BUFSIZ]; 91 92 if (argc < 3) { 93 fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n"); 94 exit(1); 95 } 96 if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) { 97 perror(argv[1]); 98 exit(2); 99 } 100 strcpy(name, _PATH_DEV); 101 if ((dirp = opendir(name)) == NULL) { 102 perror(name); 103 exit(3); 104 } 105 while ((dp = readdir(dirp)) != NULL) { 106 strcpy(&name[5], dp->d_name); 107 if (stat(name, &devstat) < 0) { 108 perror(name); 109 exit(4); 110 } 111 if (stbuf.st_dev == devstat.st_rdev && 112 (devstat.st_mode & IFMT) == IFBLK) 113 break; 114 } 115 closedir(dirp); 116 if (dp == NULL) { 117 printf("Cannot find dev 0%o corresponding to %s\n", 118 stbuf.st_rdev, argv[1]); 119 exit(5); 120 } 121 if ((fsi = open(name, 0)) < 0) { 122 perror(name); 123 exit(6); 124 } 125 fs = &sblock; 126 rdfs(SBOFF, SBSIZE, (char *)fs); 127 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 128 for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { 129 number = atoi(*argv); 130 if (chkuse(number, 1)) 131 continue; 132 if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) { 133 perror(*argv); 134 errs++; 135 } 136 } 137 printf("Don't forget to run ``fsck %s''\n", name); 138 exit(errs); 139} 140 141chkuse(blkno, cnt) 142 daddr_t blkno; 143 int cnt; 144{ 145 int cg; 146 daddr_t fsbn, bn; 147 148 fsbn = dbtofsb(fs, blkno); 149 if ((unsigned)(fsbn+cnt) > fs->fs_size) { 150 printf("block %d out of range of file system\n", blkno); 151 return (1); 152 } 153 cg = dtog(fs, fsbn); 154 if (fsbn < cgdmin(fs, cg)) { 155 if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { 156 printf("block %d in non-data area: cannot attach\n", 157 blkno); 158 return (1); 159 } 160 } else { 161 if ((fsbn+cnt) > cgbase(fs, cg+1)) { 162 printf("block %d in non-data area: cannot attach\n", 163 blkno); 164 return (1); 165 } 166 } 167 rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, 168 (char *)&acg); 169 if (!cg_chkmagic(&acg)) { 170 fprintf(stderr, "cg %d: bad magic number\n", cg); 171 errs++; 172 return (1); 173 } 174 bn = dtogd(fs, fsbn); 175 if (isclr(cg_blksfree(&acg), bn)) 176 printf("Warning: sector %d is in use\n", blkno); 177 return (0); 178} 179 180/* 181 * read a block from the file system 182 */ 183rdfs(bno, size, bf) 184 int bno, size; 185 char *bf; 186{ 187 int n; 188 189 if (lseek(fsi, bno * dev_bsize, 0) < 0) { 190 printf("seek error: %ld\n", bno); 191 perror("rdfs"); 192 exit(1); 193 } 194 n = read(fsi, bf, size); 195 if(n != size) { 196 printf("read error: %ld\n", bno); 197 perror("rdfs"); 198 exit(1); 199 } 200} 201