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 5.7 (Berkeley) 07/30/89"; 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 <sys/param.h> 39 #include <sys/dir.h> 40 #include <sys/stat.h> 41 #include <sys/time.h> 42 #include <sys/vnode.h> 43 #include <ufs/fs.h> 44 #include <ufs/inode.h> 45 #include <stdio.h> 46 #include <paths.h> 47 48 union { 49 struct fs fs; 50 char fsx[SBSIZE]; 51 } ufs; 52 #define sblock ufs.fs 53 union { 54 struct cg cg; 55 char cgx[MAXBSIZE]; 56 } ucg; 57 #define acg ucg.cg 58 struct fs *fs; 59 int fso, fsi; 60 int errs; 61 long dev_bsize = 1; 62 63 char buf[MAXBSIZE]; 64 65 66 main(argc, argv) 67 int argc; 68 char *argv[]; 69 { 70 daddr_t number; 71 struct stat stbuf, devstat; 72 register struct direct *dp; 73 DIR *dirp; 74 int fd; 75 char name[BUFSIZ]; 76 77 if (argc < 3) { 78 fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n"); 79 exit(1); 80 } 81 if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) { 82 perror(argv[1]); 83 exit(2); 84 } 85 strcpy(name, _PATH_DEV); 86 if ((dirp = opendir(name)) == NULL) { 87 perror(name); 88 exit(3); 89 } 90 while ((dp = readdir(dirp)) != NULL) { 91 strcpy(&name[5], dp->d_name); 92 if (stat(name, &devstat) < 0) { 93 perror(name); 94 exit(4); 95 } 96 if (stbuf.st_dev == devstat.st_rdev && 97 (devstat.st_mode & IFMT) == IFBLK) 98 break; 99 } 100 closedir(dirp); 101 if (dp == NULL) { 102 printf("Cannot find dev 0%o corresponding to %s\n", 103 stbuf.st_rdev, argv[1]); 104 exit(5); 105 } 106 if ((fsi = open(name, 0)) < 0) { 107 perror(name); 108 exit(6); 109 } 110 fs = &sblock; 111 rdfs(SBOFF, SBSIZE, (char *)fs); 112 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 113 for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { 114 number = atoi(*argv); 115 if (chkuse(number, 1)) 116 continue; 117 if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) { 118 perror(*argv); 119 errs++; 120 } 121 } 122 printf("Don't forget to run ``fsck %s''\n", name); 123 exit(errs); 124 } 125 126 chkuse(blkno, cnt) 127 daddr_t blkno; 128 int cnt; 129 { 130 int cg; 131 daddr_t fsbn, bn; 132 133 fsbn = dbtofsb(fs, blkno); 134 if ((unsigned)(fsbn+cnt) > fs->fs_size) { 135 printf("block %d out of range of file system\n", blkno); 136 return (1); 137 } 138 cg = dtog(fs, fsbn); 139 if (fsbn < cgdmin(fs, cg)) { 140 if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { 141 printf("block %d in non-data area: cannot attach\n", 142 blkno); 143 return (1); 144 } 145 } else { 146 if ((fsbn+cnt) > cgbase(fs, cg+1)) { 147 printf("block %d in non-data area: cannot attach\n", 148 blkno); 149 return (1); 150 } 151 } 152 rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, 153 (char *)&acg); 154 if (!cg_chkmagic(&acg)) { 155 fprintf(stderr, "cg %d: bad magic number\n", cg); 156 errs++; 157 return (1); 158 } 159 bn = dtogd(fs, fsbn); 160 if (isclr(cg_blksfree(&acg), bn)) 161 printf("Warning: sector %d is in use\n", blkno); 162 return (0); 163 } 164 165 /* 166 * read a block from the file system 167 */ 168 rdfs(bno, size, bf) 169 int bno, size; 170 char *bf; 171 { 172 int n; 173 174 if (lseek(fsi, bno * dev_bsize, 0) < 0) { 175 printf("seek error: %ld\n", bno); 176 perror("rdfs"); 177 exit(1); 178 } 179 n = read(fsi, bf, size); 180 if(n != size) { 181 printf("read error: %ld\n", bno); 182 perror("rdfs"); 183 exit(1); 184 } 185 } 186