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da158ee3 DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | char copyright[] = | |
9 | "@(#) Copyright (c) 1983 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
13 | #ifndef lint | |
a66ab591 | 14 | static char sccsid[] = "@(#)badsect.c 5.3 (Berkeley) %G%"; |
da158ee3 | 15 | #endif not lint |
c939dd1c BJ |
16 | |
17 | /* | |
18 | * badsect | |
19 | * | |
20 | * Badsect takes a list of file-system relative sector numbers | |
21 | * and makes files containing the blocks of which these sectors are a part. | |
22 | * It can be used to contain sectors which have problems if these sectors | |
23 | * are not part of the bad file for the pack (see bad144). For instance, | |
24 | * this program can be used if the driver for the file system in question | |
25 | * does not support bad block forwarding. | |
26 | */ | |
3f96c1fb | 27 | #include <stdio.h> |
c939dd1c | 28 | #include <sys/param.h> |
3f96c1fb KM |
29 | #include <sys/fs.h> |
30 | #include <sys/dir.h> | |
31 | #include <sys/stat.h> | |
32 | #include <sys/inode.h> | |
33 | ||
34 | union { | |
35 | struct fs fs; | |
36 | char fsx[SBSIZE]; | |
37 | } ufs; | |
38 | #define sblock ufs.fs | |
39 | union { | |
40 | struct cg cg; | |
41 | char cgx[MAXBSIZE]; | |
42 | } ucg; | |
43 | #define acg ucg.cg | |
44 | struct fs *fs; | |
45 | int fso, fsi; | |
46 | int errs; | |
a66ab591 | 47 | long dev_bsize = 1; |
3f96c1fb KM |
48 | |
49 | char buf[MAXBSIZE]; | |
50 | ||
c939dd1c BJ |
51 | |
52 | main(argc, argv) | |
53 | int argc; | |
3f96c1fb | 54 | char *argv[]; |
c939dd1c | 55 | { |
3f96c1fb KM |
56 | daddr_t number; |
57 | struct stat stbuf, devstat; | |
58 | register struct direct *dp; | |
59 | DIR *dirp; | |
60 | int fd; | |
61 | char name[BUFSIZ]; | |
c939dd1c | 62 | |
3f96c1fb KM |
63 | if (argc < 3) { |
64 | fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n"); | |
65 | exit(1); | |
66 | } | |
67 | if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) { | |
68 | perror(argv[1]); | |
69 | exit(2); | |
70 | } | |
71 | strcpy(name, "/dev/"); | |
72 | if ((dirp = opendir(name)) == NULL) { | |
73 | perror(name); | |
74 | exit(3); | |
75 | } | |
76 | while ((dp = readdir(dirp)) != NULL) { | |
77 | strcpy(&name[5], dp->d_name); | |
78 | if (stat(name, &devstat) < 0) { | |
79 | perror(name); | |
80 | exit(4); | |
81 | } | |
82 | if (stbuf.st_dev == devstat.st_rdev && | |
83 | (devstat.st_mode & IFMT) == IFBLK) | |
84 | break; | |
c939dd1c | 85 | } |
3f96c1fb KM |
86 | closedir(dirp); |
87 | if (dp == NULL) { | |
88 | printf("Cannot find dev 0%o corresponding to %s\n", | |
89 | stbuf.st_rdev, argv[1]); | |
90 | exit(5); | |
91 | } | |
92 | if ((fsi = open(name, 0)) < 0) { | |
93 | perror(name); | |
94 | exit(6); | |
95 | } | |
96 | fs = &sblock; | |
a66ab591 KM |
97 | rdfs(SBOFF, SBSIZE, (char *)fs); |
98 | dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); | |
3f96c1fb KM |
99 | for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { |
100 | number = atoi(*argv); | |
101 | if (chkuse(number, 1)) | |
102 | continue; | |
103 | if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) { | |
104 | perror(*argv); | |
105 | errs++; | |
106 | } | |
107 | } | |
108 | printf("Don't forget to run ``fsck %s''\n", name); | |
c939dd1c BJ |
109 | exit(errs); |
110 | } | |
3f96c1fb KM |
111 | |
112 | chkuse(blkno, cnt) | |
113 | daddr_t blkno; | |
114 | int cnt; | |
115 | { | |
116 | int cg; | |
117 | daddr_t fsbn, bn; | |
118 | ||
119 | fsbn = dbtofsb(fs, blkno); | |
120 | if ((unsigned)(fsbn+cnt) > fs->fs_size) { | |
121 | printf("block %d out of range of file system\n", blkno); | |
122 | return (1); | |
123 | } | |
124 | cg = dtog(fs, fsbn); | |
125 | if (fsbn < cgdmin(fs, cg)) { | |
126 | if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { | |
127 | printf("block %d in non-data area: cannot attach\n", | |
128 | blkno); | |
129 | return (1); | |
130 | } | |
131 | } else { | |
132 | if ((fsbn+cnt) > cgbase(fs, cg+1)) { | |
133 | printf("block %d in non-data area: cannot attach\n", | |
134 | blkno); | |
135 | return (1); | |
136 | } | |
137 | } | |
138 | rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, | |
139 | (char *)&acg); | |
140 | if (acg.cg_magic != CG_MAGIC) { | |
141 | fprintf(stderr, "cg %d: bad magic number\n", cg); | |
142 | errs++; | |
75e5614d | 143 | return (1); |
3f96c1fb KM |
144 | } |
145 | bn = dtogd(fs, fsbn); | |
146 | if (isclr(acg.cg_free, bn)) | |
147 | printf("Warning: sector %d is in use\n", blkno); | |
148 | return (0); | |
149 | } | |
150 | ||
151 | /* | |
152 | * read a block from the file system | |
153 | */ | |
154 | rdfs(bno, size, bf) | |
155 | int bno, size; | |
156 | char *bf; | |
157 | { | |
158 | int n; | |
159 | ||
a66ab591 | 160 | if (lseek(fsi, bno * dev_bsize, 0) < 0) { |
3f96c1fb KM |
161 | printf("seek error: %ld\n", bno); |
162 | perror("rdfs"); | |
163 | exit(1); | |
164 | } | |
165 | n = read(fsi, bf, size); | |
166 | if(n != size) { | |
167 | printf("read error: %ld\n", bno); | |
168 | perror("rdfs"); | |
169 | exit(1); | |
170 | } | |
171 | } |