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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 5.2 (Berkeley) 6/24/85";
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:
48: char buf[MAXBSIZE];
49:
50:
51: main(argc, argv)
52: int argc;
53: char *argv[];
54: {
55: daddr_t number;
56: struct stat stbuf, devstat;
57: register struct direct *dp;
58: DIR *dirp;
59: int fd;
60: char name[BUFSIZ];
61:
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;
84: }
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);
107: exit(errs);
108: }
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++;
141: return (1);
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: }
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