Commit | Line | Data |
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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 | |
75e5614d | 14 | static char sccsid[] = "@(#)badsect.c 5.2 (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; | |
47 | ||
48 | char buf[MAXBSIZE]; | |
49 | ||
c939dd1c BJ |
50 | |
51 | main(argc, argv) | |
52 | int argc; | |
3f96c1fb | 53 | char *argv[]; |
c939dd1c | 54 | { |
3f96c1fb KM |
55 | daddr_t number; |
56 | struct stat stbuf, devstat; | |
57 | register struct direct *dp; | |
58 | DIR *dirp; | |
59 | int fd; | |
60 | char name[BUFSIZ]; | |
c939dd1c | 61 | |
3f96c1fb KM |
62 | if (argc < 3) { |
63 | fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n"); | |
64 | exit(1); | |
65 | } | |
66 | if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) { | |
67 | perror(argv[1]); | |
68 | exit(2); | |
69 | } | |
70 | strcpy(name, "/dev/"); | |
71 | if ((dirp = opendir(name)) == NULL) { | |
72 | perror(name); | |
73 | exit(3); | |
74 | } | |
75 | while ((dp = readdir(dirp)) != NULL) { | |
76 | strcpy(&name[5], dp->d_name); | |
77 | if (stat(name, &devstat) < 0) { | |
78 | perror(name); | |
79 | exit(4); | |
80 | } | |
81 | if (stbuf.st_dev == devstat.st_rdev && | |
82 | (devstat.st_mode & IFMT) == IFBLK) | |
83 | break; | |
c939dd1c | 84 | } |
3f96c1fb KM |
85 | closedir(dirp); |
86 | if (dp == NULL) { | |
87 | printf("Cannot find dev 0%o corresponding to %s\n", | |
88 | stbuf.st_rdev, argv[1]); | |
89 | exit(5); | |
90 | } | |
91 | if ((fsi = open(name, 0)) < 0) { | |
92 | perror(name); | |
93 | exit(6); | |
94 | } | |
95 | fs = &sblock; | |
96 | rdfs(SBLOCK, SBSIZE, (char *)fs); | |
97 | for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { | |
98 | number = atoi(*argv); | |
99 | if (chkuse(number, 1)) | |
100 | continue; | |
101 | if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) { | |
102 | perror(*argv); | |
103 | errs++; | |
104 | } | |
105 | } | |
106 | printf("Don't forget to run ``fsck %s''\n", name); | |
c939dd1c BJ |
107 | exit(errs); |
108 | } | |
3f96c1fb KM |
109 | |
110 | chkuse(blkno, cnt) | |
111 | daddr_t blkno; | |
112 | int cnt; | |
113 | { | |
114 | int cg; | |
115 | daddr_t fsbn, bn; | |
116 | ||
117 | fsbn = dbtofsb(fs, blkno); | |
118 | if ((unsigned)(fsbn+cnt) > fs->fs_size) { | |
119 | printf("block %d out of range of file system\n", blkno); | |
120 | return (1); | |
121 | } | |
122 | cg = dtog(fs, fsbn); | |
123 | if (fsbn < cgdmin(fs, cg)) { | |
124 | if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { | |
125 | printf("block %d in non-data area: cannot attach\n", | |
126 | blkno); | |
127 | return (1); | |
128 | } | |
129 | } else { | |
130 | if ((fsbn+cnt) > cgbase(fs, cg+1)) { | |
131 | printf("block %d in non-data area: cannot attach\n", | |
132 | blkno); | |
133 | return (1); | |
134 | } | |
135 | } | |
136 | rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, | |
137 | (char *)&acg); | |
138 | if (acg.cg_magic != CG_MAGIC) { | |
139 | fprintf(stderr, "cg %d: bad magic number\n", cg); | |
140 | errs++; | |
75e5614d | 141 | return (1); |
3f96c1fb KM |
142 | } |
143 | bn = dtogd(fs, fsbn); | |
144 | if (isclr(acg.cg_free, bn)) | |
145 | printf("Warning: sector %d is in use\n", blkno); | |
146 | return (0); | |
147 | } | |
148 | ||
149 | /* | |
150 | * read a block from the file system | |
151 | */ | |
152 | rdfs(bno, size, bf) | |
153 | int bno, size; | |
154 | char *bf; | |
155 | { | |
156 | int n; | |
157 | ||
158 | if (lseek(fsi, bno * DEV_BSIZE, 0) < 0) { | |
159 | printf("seek error: %ld\n", bno); | |
160 | perror("rdfs"); | |
161 | exit(1); | |
162 | } | |
163 | n = read(fsi, bf, size); | |
164 | if(n != size) { | |
165 | printf("read error: %ld\n", bno); | |
166 | perror("rdfs"); | |
167 | exit(1); | |
168 | } | |
169 | } |