2 * Copyright (c) 1981, 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1981, 1983, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)badsect.c 8.1 (Berkeley) 6/5/93
35 * $FreeBSD: src/sbin/badsect/badsect.c,v 1.7.2.2 2001/07/30 10:30:04 dd Exp $
36 * $DragonFly: src/sbin/badsect/badsect.c,v 1.10 2005/02/15 01:53:05 cpressey Exp $
42 * Badsect takes a list of file-system relative sector numbers
43 * and makes files containing the blocks of which these sectors are a part.
44 * It can be used to contain sectors which have problems if these sectors
45 * are not part of the bad file for the pack (see bad144). For instance,
46 * this program can be used if the driver for the file system in question
47 * does not support bad block forwarding.
49 #include <sys/param.h>
52 #include <vfs/ufs/fs.h>
53 #include <vfs/ufs/dinode.h>
65 struct fs sblock, *fs;
73 static void rdfs(daddr_t, int, char *);
74 static int chkuse(daddr_t, int);
75 static void usage(void);
80 fprintf(stderr, "usage: badsect bbdir blkno ...\n");
85 main(int argc, char **argv)
90 struct stat stbuf, devstat;
93 char name[2 * MAXPATHLEN];
97 if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0)
98 err(2, "%s", argv[1]);
99 if (strlcpy(name, _PATH_DEV, sizeof(name)) >= sizeof(name)) {
100 errno = ENAMETOOLONG;
101 err(1, "cannot build path name");
103 if ((dirp = opendir(name)) == NULL)
105 while ((dp = readdir(dirp)) != NULL) {
106 strlcpy(name, _PATH_DEV, sizeof(name));
107 if (strlcat(name, dp->d_name, sizeof(name)) >= sizeof(name)) {
108 errno = ENAMETOOLONG;
109 err(1, "cannot build path name");
111 if (lstat(name, &devstat) < 0)
113 if (stbuf.st_dev == devstat.st_rdev &&
114 (devstat.st_mode & IFMT) == IFCHR)
119 printf("Cannot find dev 0%lo corresponding to %s\n",
120 (u_long)stbuf.st_rdev, argv[1]);
123 if ((fsi = open(name, O_RDONLY)) < 0)
126 rdfs(SBOFF, SBSIZE, (char *)fs);
127 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
128 for (argc -= 2, argv += 2; argc > 0; argc--, argv++) {
129 number = atol(*argv);
130 if (chkuse(number, 1))
133 * Print a warning if converting the block number to a dev_t
134 * will truncate it. badsect was not very useful in versions
135 * of BSD before 4.4 because dev_t was 16 bits and another
136 * bit was lost by bogus sign extensions.
138 diskbn = dbtofsb(fs, number);
140 if ((daddr_t)dev != diskbn) {
141 printf("sector %ld cannot be represented as a dev_t\n",
144 } else if (mknod(*argv, IFMT | 0600, dev) < 0) {
149 printf("Don't forget to run ``fsck %s''\n", name);
154 chkuse(daddr_t blkno, int cnt)
159 fsbn = dbtofsb(fs, blkno);
160 if (fs->fs_size < 0 || fsbn + cnt < 0) {
161 printf("internal error: negative fs size or block number\n");
164 if (fsbn + cnt > fs->fs_size) {
165 printf("block %ld out of range of file system\n", (long)blkno);
169 if (fsbn < cgdmin(fs, cg)) {
170 if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) {
171 printf("block %ld in non-data area: cannot attach\n",
176 if ((fsbn+cnt) > cgbase(fs, cg+1)) {
177 printf("block %ld in non-data area: cannot attach\n",
182 rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize,
184 if (!cg_chkmagic(&acg)) {
185 fprintf(stderr, "cg %d: bad magic number\n", cg);
189 bn = dtogd(fs, fsbn);
190 if (isclr(cg_blksfree(&acg), bn))
191 printf("Warning: sector %ld is in use\n", (long)blkno);
196 * read a block from the file system
199 rdfs(daddr_t bno, int size, char *bf)
203 if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) {
204 printf("seek error: %ld\n", (long)bno);
207 n = read(fsi, bf, size);
209 printf("read error: %ld\n", (long)bno);