1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/*
* Copyright (c) 1981, 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1981, 1983, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static const char sccsid[] = "@(#)badsect.c 8.1 (Berkeley) 6/5/93";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
/*
* badsect
*
* Badsect takes a list of file-system relative sector numbers
* and makes files containing the blocks of which these sectors are a part.
* It can be used to contain sectors which have problems if these sectors
* are not part of the bad file for the pack (see bad144). For instance,
* this program can be used if the driver for the file system in question
* does not support bad block forwarding.
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <ufs/ffs/fs.h>
#include <ufs/ufs/dinode.h>
#include <err.h>
#include <dirent.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
union {
struct fs fs;
char fsx[SBSIZE];
} ufs;
#define sblock ufs.fs
union {
struct cg cg;
char cgx[MAXBSIZE];
} ucg;
#define acg ucg.cg
struct fs *fs;
int fso, fsi;
int errs;
long dev_bsize = 1;
char buf[MAXBSIZE];
void rdfs __P((daddr_t, int, char *));
int chkuse __P((daddr_t, int));
static void
usage(void)
{
fprintf(stderr, "usage: badsect bbdir blkno ...\n");
exit(1);
}
int
main(argc, argv)
int argc;
char *argv[];
{
daddr_t diskbn;
daddr_t number;
struct stat stbuf, devstat;
register struct dirent *dp;
DIR *dirp;
char name[2 * MAXPATHLEN];
char *name_dir_end;
if (argc < 3)
usage();
if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0)
err(2, "%s", argv[1]);
strcpy(name, _PATH_DEV);
if ((dirp = opendir(name)) == NULL)
err(3, "%s", name);
name_dir_end = name + strlen(name);
while ((dp = readdir(dirp)) != NULL) {
strcpy(name_dir_end, dp->d_name);
if (lstat(name, &devstat) < 0)
err(4, "%s", name);
if (stbuf.st_dev == devstat.st_rdev &&
(devstat.st_mode & IFMT) == IFBLK)
break;
}
closedir(dirp);
if (dp == NULL) {
printf("Cannot find dev 0%lo corresponding to %s\n",
(u_long)stbuf.st_rdev, argv[1]);
exit(5);
}
/*
* Opening of a mounted on device is not allowed.
* Attempt to open the raw device instead.
*/
memcpy(name_dir_end + 1, name_dir_end, strlen(name_dir_end) + 1);
*name_dir_end = 'r';
if ((fsi = open(name, O_RDONLY)) < 0)
err(6, "%s", name);
fs = &sblock;
rdfs(SBOFF, SBSIZE, (char *)fs);
dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
for (argc -= 2, argv += 2; argc > 0; argc--, argv++) {
number = atol(*argv);
if (chkuse(number, 1))
continue;
/*
* Print a warning if converting the block number to a dev_t
* will truncate it. badsect was not very useful in versions
* of BSD before 4.4 because dev_t was 16 bits and another
* bit was lost by bogus sign extensions.
*/
diskbn = dbtofsb(fs, number);
if ((dev_t)diskbn != diskbn) {
printf("sector %ld cannot be represented as a dev_t\n",
(long)number);
errs++;
}
else if (mknod(*argv, IFMT|0600, (dev_t)diskbn) < 0) {
warn("%s", *argv);
errs++;
}
}
printf("Don't forget to run ``fsck %s''\n", name);
exit(errs);
}
int
chkuse(blkno, cnt)
daddr_t blkno;
int cnt;
{
int cg;
daddr_t fsbn, bn;
fsbn = dbtofsb(fs, blkno);
if ((unsigned)(fsbn+cnt) > fs->fs_size) {
printf("block %ld out of range of file system\n", (long)blkno);
return (1);
}
cg = dtog(fs, fsbn);
if (fsbn < cgdmin(fs, cg)) {
if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) {
printf("block %ld in non-data area: cannot attach\n",
(long)blkno);
return (1);
}
} else {
if ((fsbn+cnt) > cgbase(fs, cg+1)) {
printf("block %ld in non-data area: cannot attach\n",
(long)blkno);
return (1);
}
}
rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize,
(char *)&acg);
if (!cg_chkmagic(&acg)) {
fprintf(stderr, "cg %d: bad magic number\n", cg);
errs++;
return (1);
}
bn = dtogd(fs, fsbn);
if (isclr(cg_blksfree(&acg), bn))
printf("Warning: sector %ld is in use\n", (long)blkno);
return (0);
}
/*
* read a block from the file system
*/
void
rdfs(bno, size, bf)
daddr_t bno;
int size;
char *bf;
{
int n;
if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) {
printf("seek error: %ld\n", (long)bno);
err(1, "rdfs");
}
n = read(fsi, bf, size);
if (n != size) {
printf("read error: %ld\n", (long)bno);
err(1, "rdfs");
}
}
|
