Commit | Line | Data |
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3f96c1fb | 1 | static char *sccsid = "@(#)badsect.c 4.3 (Berkeley) 83/02/24"; |
c939dd1c BJ |
2 | |
3 | /* | |
4 | * badsect | |
5 | * | |
6 | * Badsect takes a list of file-system relative sector numbers | |
7 | * and makes files containing the blocks of which these sectors are a part. | |
8 | * It can be used to contain sectors which have problems if these sectors | |
9 | * are not part of the bad file for the pack (see bad144). For instance, | |
10 | * this program can be used if the driver for the file system in question | |
11 | * does not support bad block forwarding. | |
12 | */ | |
3f96c1fb | 13 | #include <stdio.h> |
c939dd1c | 14 | #include <sys/param.h> |
3f96c1fb KM |
15 | #include <sys/fs.h> |
16 | #include <sys/dir.h> | |
17 | #include <sys/stat.h> | |
18 | #include <sys/inode.h> | |
19 | ||
20 | union { | |
21 | struct fs fs; | |
22 | char fsx[SBSIZE]; | |
23 | } ufs; | |
24 | #define sblock ufs.fs | |
25 | union { | |
26 | struct cg cg; | |
27 | char cgx[MAXBSIZE]; | |
28 | } ucg; | |
29 | #define acg ucg.cg | |
30 | struct fs *fs; | |
31 | int fso, fsi; | |
32 | int errs; | |
33 | ||
34 | char buf[MAXBSIZE]; | |
35 | ||
c939dd1c BJ |
36 | |
37 | main(argc, argv) | |
38 | int argc; | |
3f96c1fb | 39 | char *argv[]; |
c939dd1c | 40 | { |
3f96c1fb KM |
41 | daddr_t number; |
42 | struct stat stbuf, devstat; | |
43 | register struct direct *dp; | |
44 | DIR *dirp; | |
45 | int fd; | |
46 | char name[BUFSIZ]; | |
c939dd1c | 47 | |
3f96c1fb KM |
48 | if (argc < 3) { |
49 | fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n"); | |
50 | exit(1); | |
51 | } | |
52 | if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) { | |
53 | perror(argv[1]); | |
54 | exit(2); | |
55 | } | |
56 | strcpy(name, "/dev/"); | |
57 | if ((dirp = opendir(name)) == NULL) { | |
58 | perror(name); | |
59 | exit(3); | |
60 | } | |
61 | while ((dp = readdir(dirp)) != NULL) { | |
62 | strcpy(&name[5], dp->d_name); | |
63 | if (stat(name, &devstat) < 0) { | |
64 | perror(name); | |
65 | exit(4); | |
66 | } | |
67 | if (stbuf.st_dev == devstat.st_rdev && | |
68 | (devstat.st_mode & IFMT) == IFBLK) | |
69 | break; | |
c939dd1c | 70 | } |
3f96c1fb KM |
71 | closedir(dirp); |
72 | if (dp == NULL) { | |
73 | printf("Cannot find dev 0%o corresponding to %s\n", | |
74 | stbuf.st_rdev, argv[1]); | |
75 | exit(5); | |
76 | } | |
77 | if ((fsi = open(name, 0)) < 0) { | |
78 | perror(name); | |
79 | exit(6); | |
80 | } | |
81 | fs = &sblock; | |
82 | rdfs(SBLOCK, SBSIZE, (char *)fs); | |
83 | for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { | |
84 | number = atoi(*argv); | |
85 | if (chkuse(number, 1)) | |
86 | continue; | |
87 | if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) { | |
88 | perror(*argv); | |
89 | errs++; | |
90 | } | |
91 | } | |
92 | printf("Don't forget to run ``fsck %s''\n", name); | |
c939dd1c BJ |
93 | exit(errs); |
94 | } | |
3f96c1fb KM |
95 | |
96 | chkuse(blkno, cnt) | |
97 | daddr_t blkno; | |
98 | int cnt; | |
99 | { | |
100 | int cg; | |
101 | daddr_t fsbn, bn; | |
102 | ||
103 | fsbn = dbtofsb(fs, blkno); | |
104 | if ((unsigned)(fsbn+cnt) > fs->fs_size) { | |
105 | printf("block %d out of range of file system\n", blkno); | |
106 | return (1); | |
107 | } | |
108 | cg = dtog(fs, fsbn); | |
109 | if (fsbn < cgdmin(fs, cg)) { | |
110 | if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { | |
111 | printf("block %d in non-data area: cannot attach\n", | |
112 | blkno); | |
113 | return (1); | |
114 | } | |
115 | } else { | |
116 | if ((fsbn+cnt) > cgbase(fs, cg+1)) { | |
117 | printf("block %d in non-data area: cannot attach\n", | |
118 | blkno); | |
119 | return (1); | |
120 | } | |
121 | } | |
122 | rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, | |
123 | (char *)&acg); | |
124 | if (acg.cg_magic != CG_MAGIC) { | |
125 | fprintf(stderr, "cg %d: bad magic number\n", cg); | |
126 | errs++; | |
127 | return; | |
128 | } | |
129 | bn = dtogd(fs, fsbn); | |
130 | if (isclr(acg.cg_free, bn)) | |
131 | printf("Warning: sector %d is in use\n", blkno); | |
132 | return (0); | |
133 | } | |
134 | ||
135 | /* | |
136 | * read a block from the file system | |
137 | */ | |
138 | rdfs(bno, size, bf) | |
139 | int bno, size; | |
140 | char *bf; | |
141 | { | |
142 | int n; | |
143 | ||
144 | if (lseek(fsi, bno * DEV_BSIZE, 0) < 0) { | |
145 | printf("seek error: %ld\n", bno); | |
146 | perror("rdfs"); | |
147 | exit(1); | |
148 | } | |
149 | n = read(fsi, bf, size); | |
150 | if(n != size) { | |
151 | printf("read error: %ld\n", bno); | |
152 | perror("rdfs"); | |
153 | exit(1); | |
154 | } | |
155 | } |