freebsd-dev/sbin/badsect/badsect.c
Robert Watson d266903483 The badsect(8) utility uses atol(), which doesn't allow very good error
checking and only recognizes numbers in base 10.  The attached patch
checks errno after strtol() and uses a base of 0 to allow octal, or hex
sector numbers too.

PR:		73112
Submitted by:	keramida
MFC after:	2 weeks
2005-01-03 19:03:40 +00:00

194 lines
5.4 KiB
C

/*
* 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.
* 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.
*/
#if 0
#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
static const char sccsid[] = "@(#)badsect.c 8.1 (Berkeley) 6/5/93";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* 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 <sys/disklabel.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <errno.h>
#include <dirent.h>
#include <fcntl.h>
#include <libufs.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define sblock disk.d_fs
#define acg disk.d_cg
struct uufsd disk;
struct fs *fs = &sblock;
int errs;
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;
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 (ufs_disk_fillout(&disk, name) == -1) {
if (disk.d_error != NULL)
errx(6, "%s: %s", name, disk.d_error);
else
err(7, "%s", name);
}
for (argc -= 2, argv += 2; argc > 0; argc--, argv++) {
number = strtol(*argv, NULL, 0);
if (errno == EINVAL || errno == ERANGE)
err(8, "%s", *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++;
}
}
ufs_disk_close(&disk);
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);
}
}
if (cgread1(&disk, cg) != 1) {
fprintf(stderr, "cg %d: could not be read\n", cg);
errs++;
return (1);
}
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);
}