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 35 static 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";*/ 42 static char *rcsid = "$Id: badsect.c,v 1.8 1994/10/31 04:19:00 cgd 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 <string.h> 67 #include <unistd.h> 68 69 union { 70 struct fs fs; 71 char fsx[SBSIZE]; 72 } ufs; 73 #define sblock ufs.fs 74 union { 75 struct cg cg; 76 char cgx[MAXBSIZE]; 77 } ucg; 78 #define acg ucg.cg 79 struct fs *fs; 80 int fso, fsi; 81 int errs; 82 long dev_bsize = 1; 83 84 char buf[MAXBSIZE]; 85 86 void rdfs __P((daddr_t, int, char *)); 87 int chkuse __P((daddr_t, int)); 88 89 int 90 main(argc, argv) 91 int argc; 92 char *argv[]; 93 { 94 daddr_t number; 95 struct stat stbuf, devstat; 96 register struct direct *dp; 97 DIR *dirp; 98 char name[BUFSIZ]; 99 100 if (argc < 3) { 101 fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n"); 102 exit(1); 103 } 104 if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) { 105 perror(argv[1]); 106 exit(2); 107 } 108 strcpy(name, _PATH_DEV); 109 if ((dirp = opendir(name)) == NULL) { 110 perror(name); 111 exit(3); 112 } 113 while ((dp = readdir(dirp)) != NULL) { 114 strcpy(&name[5], dp->d_name); 115 if (stat(name, &devstat) < 0) { 116 perror(name); 117 exit(4); 118 } 119 if (stbuf.st_dev == devstat.st_rdev && 120 (devstat.st_mode & IFMT) == IFBLK) 121 break; 122 } 123 closedir(dirp); 124 if (dp == NULL) { 125 printf("Cannot find dev 0%o corresponding to %s\n", 126 stbuf.st_rdev, argv[1]); 127 exit(5); 128 } 129 if ((fsi = open(name, 0)) < 0) { 130 perror(name); 131 exit(6); 132 } 133 fs = &sblock; 134 rdfs(SBOFF, SBSIZE, (char *)fs); 135 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 136 for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { 137 number = atoi(*argv); 138 if (chkuse(number, 1)) 139 continue; 140 if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) { 141 perror(*argv); 142 errs++; 143 } 144 } 145 printf("Don't forget to run ``fsck %s''\n", name); 146 exit(errs); 147 } 148 149 int 150 chkuse(blkno, cnt) 151 daddr_t blkno; 152 int cnt; 153 { 154 int cg; 155 daddr_t fsbn, bn; 156 157 fsbn = dbtofsb(fs, blkno); 158 if ((unsigned)(fsbn+cnt) > fs->fs_size) { 159 printf("block %d out of range of file system\n", blkno); 160 return (1); 161 } 162 cg = dtog(fs, fsbn); 163 if (fsbn < cgdmin(fs, cg)) { 164 if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { 165 printf("block %d in non-data area: cannot attach\n", 166 blkno); 167 return (1); 168 } 169 } else { 170 if ((fsbn+cnt) > cgbase(fs, cg+1)) { 171 printf("block %d in non-data area: cannot attach\n", 172 blkno); 173 return (1); 174 } 175 } 176 rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, 177 (char *)&acg); 178 if (!cg_chkmagic(&acg)) { 179 fprintf(stderr, "cg %d: bad magic number\n", cg); 180 errs++; 181 return (1); 182 } 183 bn = dtogd(fs, fsbn); 184 if (isclr(cg_blksfree(&acg), bn)) 185 printf("Warning: sector %d is in use\n", blkno); 186 return (0); 187 } 188 189 /* 190 * read a block from the file system 191 */ 192 void 193 rdfs(bno, size, bf) 194 daddr_t bno; 195 int size; 196 char *bf; 197 { 198 int n; 199 200 if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) { 201 printf("seek error: %ld\n", bno); 202 perror("rdfs"); 203 exit(1); 204 } 205 n = read(fsi, bf, size); 206 if (n != size) { 207 printf("read error: %ld\n", bno); 208 perror("rdfs"); 209 exit(1); 210 } 211 } 212