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1.1 root 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
14: static char sccsid[] = "@(#)badsect.c 5.4 (Berkeley) 5/31/88";
15: #endif not lint
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: */
27: #include <stdio.h>
28: #include <sys/param.h>
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: long dev_bsize = 1;
48:
49: char buf[MAXBSIZE];
50:
51:
52: main(argc, argv)
53: int argc;
54: char *argv[];
55: {
56: daddr_t number;
57: struct stat stbuf, devstat;
58: register struct direct *dp;
59: DIR *dirp;
60: int fd;
61: char name[BUFSIZ];
62:
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;
85: }
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;
97: rdfs(SBOFF, SBSIZE, (char *)fs);
98: dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
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);
109: exit(errs);
110: }
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 (!cg_chkmagic(&acg)) {
141: fprintf(stderr, "cg %d: bad magic number\n", cg);
142: errs++;
143: return (1);
144: }
145: bn = dtogd(fs, fsbn);
146: if (isclr(cg_blksfree(&acg), 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:
160: if (lseek(fsi, bno * dev_bsize, 0) < 0) {
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: }
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