1 /* 2 * Copyright (c) 1981, 1983 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 char copyright[] = 10 "@(#) Copyright (c) 1981, 1983 The Regents of the University of California.\n\ 11 All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)badsect.c 5.11 (Berkeley) 02/15/93"; 16 #endif /* not lint */ 17 18 /* 19 * badsect 20 * 21 * Badsect takes a list of file-system relative sector numbers 22 * and makes files containing the blocks of which these sectors are a part. 23 * It can be used to contain sectors which have problems if these sectors 24 * are not part of the bad file for the pack (see bad144). For instance, 25 * this program can be used if the driver for the file system in question 26 * does not support bad block forwarding. 27 */ 28 #include <sys/param.h> 29 #include <sys/dir.h> 30 #include <sys/stat.h> 31 #include <ufs/ffs/fs.h> 32 #include <ufs/ufs/dinode.h> 33 #include <unistd.h> 34 #include <stdio.h> 35 #include <paths.h> 36 37 union { 38 struct fs fs; 39 char fsx[SBSIZE]; 40 } ufs; 41 #define sblock ufs.fs 42 union { 43 struct cg cg; 44 char cgx[MAXBSIZE]; 45 } ucg; 46 #define acg ucg.cg 47 struct fs *fs; 48 int fso, fsi; 49 int errs; 50 long dev_bsize = 1; 51 52 char buf[MAXBSIZE]; 53 54 55 main(argc, argv) 56 int argc; 57 char *argv[]; 58 { 59 daddr_t number; 60 struct stat stbuf, devstat; 61 register struct direct *dp; 62 DIR *dirp; 63 int fd; 64 char name[BUFSIZ]; 65 66 if (argc < 3) { 67 fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n"); 68 exit(1); 69 } 70 if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) { 71 perror(argv[1]); 72 exit(2); 73 } 74 strcpy(name, _PATH_DEV); 75 if ((dirp = opendir(name)) == NULL) { 76 perror(name); 77 exit(3); 78 } 79 while ((dp = readdir(dirp)) != NULL) { 80 strcpy(&name[5], dp->d_name); 81 if (stat(name, &devstat) < 0) { 82 perror(name); 83 exit(4); 84 } 85 if (stbuf.st_dev == devstat.st_rdev && 86 (devstat.st_mode & IFMT) == IFBLK) 87 break; 88 } 89 closedir(dirp); 90 if (dp == NULL) { 91 printf("Cannot find dev 0%o corresponding to %s\n", 92 stbuf.st_rdev, argv[1]); 93 exit(5); 94 } 95 if ((fsi = open(name, 0)) < 0) { 96 perror(name); 97 exit(6); 98 } 99 fs = &sblock; 100 rdfs(SBOFF, SBSIZE, (char *)fs); 101 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 102 for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { 103 number = atoi(*argv); 104 if (chkuse(number, 1)) 105 continue; 106 if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) { 107 perror(*argv); 108 errs++; 109 } 110 } 111 printf("Don't forget to run ``fsck %s''\n", name); 112 exit(errs); 113 } 114 115 chkuse(blkno, cnt) 116 daddr_t blkno; 117 int cnt; 118 { 119 int cg; 120 daddr_t fsbn, bn; 121 122 fsbn = dbtofsb(fs, blkno); 123 if ((unsigned)(fsbn+cnt) > fs->fs_size) { 124 printf("block %d out of range of file system\n", blkno); 125 return (1); 126 } 127 cg = dtog(fs, fsbn); 128 if (fsbn < cgdmin(fs, cg)) { 129 if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { 130 printf("block %d in non-data area: cannot attach\n", 131 blkno); 132 return (1); 133 } 134 } else { 135 if ((fsbn+cnt) > cgbase(fs, cg+1)) { 136 printf("block %d in non-data area: cannot attach\n", 137 blkno); 138 return (1); 139 } 140 } 141 rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, 142 (char *)&acg); 143 if (!cg_chkmagic(&acg)) { 144 fprintf(stderr, "cg %d: bad magic number\n", cg); 145 errs++; 146 return (1); 147 } 148 bn = dtogd(fs, fsbn); 149 if (isclr(cg_blksfree(&acg), bn)) 150 printf("Warning: sector %d is in use\n", blkno); 151 return (0); 152 } 153 154 /* 155 * read a block from the file system 156 */ 157 rdfs(bno, size, bf) 158 daddr_t bno; 159 int size; 160 char *bf; 161 { 162 int n; 163 164 if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) { 165 printf("seek error: %ld\n", bno); 166 perror("rdfs"); 167 exit(1); 168 } 169 n = read(fsi, bf, size); 170 if (n != size) { 171 printf("read error: %ld\n", bno); 172 perror("rdfs"); 173 exit(1); 174 } 175 } 176