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 are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 char copyright[] = 20 "@(#) Copyright (c) 1981, 1983 The Regents of the University of California.\n\ 21 All rights reserved.\n"; 22 #endif /* not lint */ 23 24 #ifndef lint 25 static char sccsid[] = "@(#)badsect.c 5.5 (Berkeley) 11/01/88"; 26 #endif /* not lint */ 27 28 /* 29 * badsect 30 * 31 * Badsect takes a list of file-system relative sector numbers 32 * and makes files containing the blocks of which these sectors are a part. 33 * It can be used to contain sectors which have problems if these sectors 34 * are not part of the bad file for the pack (see bad144). For instance, 35 * this program can be used if the driver for the file system in question 36 * does not support bad block forwarding. 37 */ 38 #include <stdio.h> 39 #include <sys/param.h> 40 #include <sys/fs.h> 41 #include <sys/dir.h> 42 #include <sys/stat.h> 43 #include <sys/inode.h> 44 45 union { 46 struct fs fs; 47 char fsx[SBSIZE]; 48 } ufs; 49 #define sblock ufs.fs 50 union { 51 struct cg cg; 52 char cgx[MAXBSIZE]; 53 } ucg; 54 #define acg ucg.cg 55 struct fs *fs; 56 int fso, fsi; 57 int errs; 58 long dev_bsize = 1; 59 60 char buf[MAXBSIZE]; 61 62 63 main(argc, argv) 64 int argc; 65 char *argv[]; 66 { 67 daddr_t number; 68 struct stat stbuf, devstat; 69 register struct direct *dp; 70 DIR *dirp; 71 int fd; 72 char name[BUFSIZ]; 73 74 if (argc < 3) { 75 fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n"); 76 exit(1); 77 } 78 if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) { 79 perror(argv[1]); 80 exit(2); 81 } 82 strcpy(name, "/dev/"); 83 if ((dirp = opendir(name)) == NULL) { 84 perror(name); 85 exit(3); 86 } 87 while ((dp = readdir(dirp)) != NULL) { 88 strcpy(&name[5], dp->d_name); 89 if (stat(name, &devstat) < 0) { 90 perror(name); 91 exit(4); 92 } 93 if (stbuf.st_dev == devstat.st_rdev && 94 (devstat.st_mode & IFMT) == IFBLK) 95 break; 96 } 97 closedir(dirp); 98 if (dp == NULL) { 99 printf("Cannot find dev 0%o corresponding to %s\n", 100 stbuf.st_rdev, argv[1]); 101 exit(5); 102 } 103 if ((fsi = open(name, 0)) < 0) { 104 perror(name); 105 exit(6); 106 } 107 fs = &sblock; 108 rdfs(SBOFF, SBSIZE, (char *)fs); 109 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 110 for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { 111 number = atoi(*argv); 112 if (chkuse(number, 1)) 113 continue; 114 if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) { 115 perror(*argv); 116 errs++; 117 } 118 } 119 printf("Don't forget to run ``fsck %s''\n", name); 120 exit(errs); 121 } 122 123 chkuse(blkno, cnt) 124 daddr_t blkno; 125 int cnt; 126 { 127 int cg; 128 daddr_t fsbn, bn; 129 130 fsbn = dbtofsb(fs, blkno); 131 if ((unsigned)(fsbn+cnt) > fs->fs_size) { 132 printf("block %d out of range of file system\n", blkno); 133 return (1); 134 } 135 cg = dtog(fs, fsbn); 136 if (fsbn < cgdmin(fs, cg)) { 137 if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { 138 printf("block %d in non-data area: cannot attach\n", 139 blkno); 140 return (1); 141 } 142 } else { 143 if ((fsbn+cnt) > cgbase(fs, cg+1)) { 144 printf("block %d in non-data area: cannot attach\n", 145 blkno); 146 return (1); 147 } 148 } 149 rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, 150 (char *)&acg); 151 if (!cg_chkmagic(&acg)) { 152 fprintf(stderr, "cg %d: bad magic number\n", cg); 153 errs++; 154 return (1); 155 } 156 bn = dtogd(fs, fsbn); 157 if (isclr(cg_blksfree(&acg), bn)) 158 printf("Warning: sector %d is in use\n", blkno); 159 return (0); 160 } 161 162 /* 163 * read a block from the file system 164 */ 165 rdfs(bno, size, bf) 166 int bno, size; 167 char *bf; 168 { 169 int n; 170 171 if (lseek(fsi, bno * dev_bsize, 0) < 0) { 172 printf("seek error: %ld\n", bno); 173 perror("rdfs"); 174 exit(1); 175 } 176 n = read(fsi, bf, size); 177 if(n != size) { 178 printf("read error: %ld\n", bno); 179 perror("rdfs"); 180 exit(1); 181 } 182 } 183