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/*
* 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 <string.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(daddr_t, int, char *);
int chkuse(daddr_t, int);
static void
usage(void)
{
fprintf(stderr, "usage: badsect bbdir blkno ...\n");
exit(1);
}
int
main(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) == IFCHR)
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);
}
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(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(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");
}
}
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