badsect.c revision 1.1.1.3 1 1.1 cgd /*
2 1.1.1.2 mycroft * Copyright (c) 1981, 1983, 1993
3 1.1.1.2 mycroft * The Regents of the University of California. All rights reserved.
4 1.1 cgd *
5 1.1 cgd * Redistribution and use in source and binary forms, with or without
6 1.1 cgd * modification, are permitted provided that the following conditions
7 1.1 cgd * are met:
8 1.1 cgd * 1. Redistributions of source code must retain the above copyright
9 1.1 cgd * notice, this list of conditions and the following disclaimer.
10 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright
11 1.1 cgd * notice, this list of conditions and the following disclaimer in the
12 1.1 cgd * documentation and/or other materials provided with the distribution.
13 1.1 cgd * 3. All advertising materials mentioning features or use of this software
14 1.1 cgd * must display the following acknowledgement:
15 1.1 cgd * This product includes software developed by the University of
16 1.1 cgd * California, Berkeley and its contributors.
17 1.1 cgd * 4. Neither the name of the University nor the names of its contributors
18 1.1 cgd * may be used to endorse or promote products derived from this software
19 1.1 cgd * without specific prior written permission.
20 1.1 cgd *
21 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 1.1 cgd * SUCH DAMAGE.
32 1.1 cgd */
33 1.1 cgd
34 1.1 cgd #ifndef lint
35 1.1.1.2 mycroft static char copyright[] =
36 1.1.1.2 mycroft "@(#) Copyright (c) 1981, 1983, 1993\n\
37 1.1.1.2 mycroft The Regents of the University of California. All rights reserved.\n";
38 1.1 cgd #endif /* not lint */
39 1.1 cgd
40 1.1 cgd #ifndef lint
41 1.1.1.3 lukem static char sccsid[] = "@(#)badsect.c 8.2 (Berkeley) 5/4/95";
42 1.1 cgd #endif /* not lint */
43 1.1 cgd
44 1.1 cgd /*
45 1.1 cgd * badsect
46 1.1 cgd *
47 1.1 cgd * Badsect takes a list of file-system relative sector numbers
48 1.1 cgd * and makes files containing the blocks of which these sectors are a part.
49 1.1 cgd * It can be used to contain sectors which have problems if these sectors
50 1.1 cgd * are not part of the bad file for the pack (see bad144). For instance,
51 1.1 cgd * this program can be used if the driver for the file system in question
52 1.1 cgd * does not support bad block forwarding.
53 1.1 cgd */
54 1.1 cgd #include <sys/param.h>
55 1.1 cgd #include <sys/dir.h>
56 1.1 cgd #include <sys/stat.h>
57 1.1.1.2 mycroft
58 1.1.1.2 mycroft #include <ufs/ufs/dinode.h>
59 1.1.1.3 lukem #include <ufs/ffs/fs.h>
60 1.1.1.2 mycroft
61 1.1.1.2 mycroft #include <fcntl.h>
62 1.1 cgd #include <paths.h>
63 1.1.1.2 mycroft #include <stdio.h>
64 1.1.1.2 mycroft #include <stdlib.h>
65 1.1.1.2 mycroft #include <unistd.h>
66 1.1 cgd
67 1.1 cgd union {
68 1.1 cgd struct fs fs;
69 1.1 cgd char fsx[SBSIZE];
70 1.1 cgd } ufs;
71 1.1 cgd #define sblock ufs.fs
72 1.1 cgd union {
73 1.1 cgd struct cg cg;
74 1.1 cgd char cgx[MAXBSIZE];
75 1.1 cgd } ucg;
76 1.1 cgd #define acg ucg.cg
77 1.1 cgd struct fs *fs;
78 1.1 cgd int fso, fsi;
79 1.1 cgd int errs;
80 1.1 cgd long dev_bsize = 1;
81 1.1 cgd
82 1.1 cgd char buf[MAXBSIZE];
83 1.1 cgd
84 1.1.1.2 mycroft void rdfs __P((daddr_t, int, char *));
85 1.1.1.2 mycroft int chkuse __P((daddr_t, int));
86 1.1 cgd
87 1.1.1.2 mycroft int
88 1.1 cgd main(argc, argv)
89 1.1 cgd int argc;
90 1.1 cgd char *argv[];
91 1.1 cgd {
92 1.1 cgd daddr_t number;
93 1.1 cgd struct stat stbuf, devstat;
94 1.1 cgd register struct direct *dp;
95 1.1 cgd DIR *dirp;
96 1.1 cgd char name[BUFSIZ];
97 1.1 cgd
98 1.1 cgd if (argc < 3) {
99 1.1 cgd fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n");
100 1.1 cgd exit(1);
101 1.1 cgd }
102 1.1 cgd if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) {
103 1.1 cgd perror(argv[1]);
104 1.1 cgd exit(2);
105 1.1 cgd }
106 1.1 cgd strcpy(name, _PATH_DEV);
107 1.1 cgd if ((dirp = opendir(name)) == NULL) {
108 1.1 cgd perror(name);
109 1.1 cgd exit(3);
110 1.1 cgd }
111 1.1 cgd while ((dp = readdir(dirp)) != NULL) {
112 1.1 cgd strcpy(&name[5], dp->d_name);
113 1.1 cgd if (stat(name, &devstat) < 0) {
114 1.1 cgd perror(name);
115 1.1 cgd exit(4);
116 1.1 cgd }
117 1.1 cgd if (stbuf.st_dev == devstat.st_rdev &&
118 1.1 cgd (devstat.st_mode & IFMT) == IFBLK)
119 1.1 cgd break;
120 1.1 cgd }
121 1.1 cgd closedir(dirp);
122 1.1 cgd if (dp == NULL) {
123 1.1 cgd printf("Cannot find dev 0%o corresponding to %s\n",
124 1.1 cgd stbuf.st_rdev, argv[1]);
125 1.1 cgd exit(5);
126 1.1 cgd }
127 1.1 cgd if ((fsi = open(name, 0)) < 0) {
128 1.1 cgd perror(name);
129 1.1 cgd exit(6);
130 1.1 cgd }
131 1.1 cgd fs = &sblock;
132 1.1 cgd rdfs(SBOFF, SBSIZE, (char *)fs);
133 1.1 cgd dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
134 1.1 cgd for (argc -= 2, argv += 2; argc > 0; argc--, argv++) {
135 1.1 cgd number = atoi(*argv);
136 1.1 cgd if (chkuse(number, 1))
137 1.1 cgd continue;
138 1.1 cgd if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) {
139 1.1 cgd perror(*argv);
140 1.1 cgd errs++;
141 1.1 cgd }
142 1.1 cgd }
143 1.1 cgd printf("Don't forget to run ``fsck %s''\n", name);
144 1.1 cgd exit(errs);
145 1.1 cgd }
146 1.1 cgd
147 1.1.1.2 mycroft int
148 1.1 cgd chkuse(blkno, cnt)
149 1.1 cgd daddr_t blkno;
150 1.1 cgd int cnt;
151 1.1 cgd {
152 1.1 cgd int cg;
153 1.1 cgd daddr_t fsbn, bn;
154 1.1 cgd
155 1.1 cgd fsbn = dbtofsb(fs, blkno);
156 1.1 cgd if ((unsigned)(fsbn+cnt) > fs->fs_size) {
157 1.1 cgd printf("block %d out of range of file system\n", blkno);
158 1.1 cgd return (1);
159 1.1 cgd }
160 1.1 cgd cg = dtog(fs, fsbn);
161 1.1 cgd if (fsbn < cgdmin(fs, cg)) {
162 1.1 cgd if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) {
163 1.1 cgd printf("block %d in non-data area: cannot attach\n",
164 1.1 cgd blkno);
165 1.1 cgd return (1);
166 1.1 cgd }
167 1.1 cgd } else {
168 1.1 cgd if ((fsbn+cnt) > cgbase(fs, cg+1)) {
169 1.1 cgd printf("block %d in non-data area: cannot attach\n",
170 1.1 cgd blkno);
171 1.1 cgd return (1);
172 1.1 cgd }
173 1.1 cgd }
174 1.1 cgd rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize,
175 1.1 cgd (char *)&acg);
176 1.1 cgd if (!cg_chkmagic(&acg)) {
177 1.1 cgd fprintf(stderr, "cg %d: bad magic number\n", cg);
178 1.1 cgd errs++;
179 1.1 cgd return (1);
180 1.1 cgd }
181 1.1 cgd bn = dtogd(fs, fsbn);
182 1.1 cgd if (isclr(cg_blksfree(&acg), bn))
183 1.1 cgd printf("Warning: sector %d is in use\n", blkno);
184 1.1 cgd return (0);
185 1.1 cgd }
186 1.1 cgd
187 1.1 cgd /*
188 1.1 cgd * read a block from the file system
189 1.1 cgd */
190 1.1.1.2 mycroft void
191 1.1 cgd rdfs(bno, size, bf)
192 1.1.1.2 mycroft daddr_t bno;
193 1.1.1.2 mycroft int size;
194 1.1 cgd char *bf;
195 1.1 cgd {
196 1.1 cgd int n;
197 1.1 cgd
198 1.1.1.2 mycroft if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) {
199 1.1 cgd printf("seek error: %ld\n", bno);
200 1.1 cgd perror("rdfs");
201 1.1 cgd exit(1);
202 1.1 cgd }
203 1.1 cgd n = read(fsi, bf, size);
204 1.1.1.2 mycroft if (n != size) {
205 1.1 cgd printf("read error: %ld\n", bno);
206 1.1 cgd perror("rdfs");
207 1.1 cgd exit(1);
208 1.1 cgd }
209 1.1 cgd }
210