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da158ee3 | 1 | /* |
14955f05 KB |
2 | * Copyright (c) 1981, 1983 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
6ecf3d85 | 5 | * %sccs.include.redist.c% |
da158ee3 DF |
6 | */ |
7 | ||
8 | #ifndef lint | |
9 | char copyright[] = | |
14955f05 | 10 | "@(#) Copyright (c) 1981, 1983 The Regents of the University of California.\n\ |
da158ee3 | 11 | All rights reserved.\n"; |
14955f05 | 12 | #endif /* not lint */ |
da158ee3 DF |
13 | |
14 | #ifndef lint | |
6ecf3d85 | 15 | static char sccsid[] = "@(#)badsect.c 5.9 (Berkeley) %G%"; |
14955f05 | 16 | #endif /* not lint */ |
c939dd1c BJ |
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> | |
3f96c1fb KM |
29 | #include <sys/dir.h> |
30 | #include <sys/stat.h> | |
c0efa4d3 | 31 | #include <ufs/fs.h> |
3eba0f43 | 32 | #include <ufs/dinode.h> |
7abf8d65 KB |
33 | #include <stdio.h> |
34 | #include <paths.h> | |
3f96c1fb KM |
35 | |
36 | union { | |
37 | struct fs fs; | |
38 | char fsx[SBSIZE]; | |
39 | } ufs; | |
40 | #define sblock ufs.fs | |
41 | union { | |
42 | struct cg cg; | |
43 | char cgx[MAXBSIZE]; | |
44 | } ucg; | |
45 | #define acg ucg.cg | |
46 | struct fs *fs; | |
47 | int fso, fsi; | |
48 | int errs; | |
a66ab591 | 49 | long dev_bsize = 1; |
3f96c1fb KM |
50 | |
51 | char buf[MAXBSIZE]; | |
52 | ||
c939dd1c BJ |
53 | |
54 | main(argc, argv) | |
55 | int argc; | |
3f96c1fb | 56 | char *argv[]; |
c939dd1c | 57 | { |
3f96c1fb KM |
58 | daddr_t number; |
59 | struct stat stbuf, devstat; | |
60 | register struct direct *dp; | |
61 | DIR *dirp; | |
62 | int fd; | |
63 | char name[BUFSIZ]; | |
c939dd1c | 64 | |
3f96c1fb KM |
65 | if (argc < 3) { |
66 | fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n"); | |
67 | exit(1); | |
68 | } | |
69 | if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) { | |
70 | perror(argv[1]); | |
71 | exit(2); | |
72 | } | |
7abf8d65 | 73 | strcpy(name, _PATH_DEV); |
3f96c1fb KM |
74 | if ((dirp = opendir(name)) == NULL) { |
75 | perror(name); | |
76 | exit(3); | |
77 | } | |
78 | while ((dp = readdir(dirp)) != NULL) { | |
79 | strcpy(&name[5], dp->d_name); | |
80 | if (stat(name, &devstat) < 0) { | |
81 | perror(name); | |
82 | exit(4); | |
83 | } | |
84 | if (stbuf.st_dev == devstat.st_rdev && | |
85 | (devstat.st_mode & IFMT) == IFBLK) | |
86 | break; | |
c939dd1c | 87 | } |
3f96c1fb KM |
88 | closedir(dirp); |
89 | if (dp == NULL) { | |
90 | printf("Cannot find dev 0%o corresponding to %s\n", | |
91 | stbuf.st_rdev, argv[1]); | |
92 | exit(5); | |
93 | } | |
94 | if ((fsi = open(name, 0)) < 0) { | |
95 | perror(name); | |
96 | exit(6); | |
97 | } | |
98 | fs = &sblock; | |
a66ab591 KM |
99 | rdfs(SBOFF, SBSIZE, (char *)fs); |
100 | dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); | |
3f96c1fb KM |
101 | for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { |
102 | number = atoi(*argv); | |
103 | if (chkuse(number, 1)) | |
104 | continue; | |
105 | if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) { | |
106 | perror(*argv); | |
107 | errs++; | |
108 | } | |
109 | } | |
110 | printf("Don't forget to run ``fsck %s''\n", name); | |
c939dd1c BJ |
111 | exit(errs); |
112 | } | |
3f96c1fb KM |
113 | |
114 | chkuse(blkno, cnt) | |
115 | daddr_t blkno; | |
116 | int cnt; | |
117 | { | |
118 | int cg; | |
119 | daddr_t fsbn, bn; | |
120 | ||
121 | fsbn = dbtofsb(fs, blkno); | |
122 | if ((unsigned)(fsbn+cnt) > fs->fs_size) { | |
123 | printf("block %d out of range of file system\n", blkno); | |
124 | return (1); | |
125 | } | |
126 | cg = dtog(fs, fsbn); | |
127 | if (fsbn < cgdmin(fs, cg)) { | |
128 | if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { | |
129 | printf("block %d in non-data area: cannot attach\n", | |
130 | blkno); | |
131 | return (1); | |
132 | } | |
133 | } else { | |
134 | if ((fsbn+cnt) > cgbase(fs, cg+1)) { | |
135 | printf("block %d in non-data area: cannot attach\n", | |
136 | blkno); | |
137 | return (1); | |
138 | } | |
139 | } | |
140 | rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, | |
141 | (char *)&acg); | |
89b44b6d | 142 | if (!cg_chkmagic(&acg)) { |
3f96c1fb KM |
143 | fprintf(stderr, "cg %d: bad magic number\n", cg); |
144 | errs++; | |
75e5614d | 145 | return (1); |
3f96c1fb KM |
146 | } |
147 | bn = dtogd(fs, fsbn); | |
89b44b6d | 148 | if (isclr(cg_blksfree(&acg), bn)) |
3f96c1fb KM |
149 | printf("Warning: sector %d is in use\n", blkno); |
150 | return (0); | |
151 | } | |
152 | ||
153 | /* | |
154 | * read a block from the file system | |
155 | */ | |
156 | rdfs(bno, size, bf) | |
157 | int bno, size; | |
158 | char *bf; | |
159 | { | |
160 | int n; | |
161 | ||
a66ab591 | 162 | if (lseek(fsi, bno * dev_bsize, 0) < 0) { |
3f96c1fb KM |
163 | printf("seek error: %ld\n", bno); |
164 | perror("rdfs"); | |
165 | exit(1); | |
166 | } | |
167 | n = read(fsi, bf, size); | |
168 | if(n != size) { | |
169 | printf("read error: %ld\n", bno); | |
170 | perror("rdfs"); | |
171 | exit(1); | |
172 | } | |
173 | } |