269 lines
6.9 KiB
C
269 lines
6.9 KiB
C
/* $NetBSD: badsect.c,v 1.29 2004/08/08 02:51:19 christos Exp $ */
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/*
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* Copyright (c) 1981, 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1981, 1983, 1993\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)badsect.c 8.2 (Berkeley) 5/4/95";
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#else
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__RCSID("$NetBSD: badsect.c,v 1.29 2004/08/08 02:51:19 christos Exp $");
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#endif
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#endif /* not lint */
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/*
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* badsect
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*
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* Badsect takes a list of file-system relative sector numbers
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* and makes files containing the blocks of which these sectors are a part.
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* It can be used to contain sectors which have problems if these sectors
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* are not part of the bad file for the pack (see bad144). For instance,
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* this program can be used if the driver for the file system in question
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* does not support bad block forwarding.
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*/
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <sys/stat.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ufs/ufs_bswap.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <err.h>
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static union {
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struct fs fs;
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char fsx[SBLOCKSIZE];
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} ufs;
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#define sblock ufs.fs
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static union {
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struct cg cg;
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char cgx[MAXBSIZE];
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} ucg;
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#define acg ucg.cg
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static struct fs *fs;
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static int fsi;
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static int errs;
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static off_t dev_bsize = 1;
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static int needswap = 0;
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static int is_ufs2;
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static void rdfs(off_t, size_t, void *);
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static int chkuse(daddr_t, int);
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int main(int, char *[]);
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static const off_t sblock_try[] = SBLOCKSEARCH;
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int
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main(int argc, char *argv[])
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{
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daddr_t number;
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struct stat stbuf, devstat;
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struct direct *dp;
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int i, did = 0;
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DIR *dirp;
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char name[MAXPATHLEN];
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size_t dl = sizeof(_PATH_DEV);
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if (argc < 3) {
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(void)fprintf(stderr, "usage: %s bbdir blkno [ blkno ]\n",
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getprogname());
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exit(1);
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}
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if (chdir(argv[1]) == -1)
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err(1, "Cannot change directory to `%s'", argv[1]);
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if (stat(".", &stbuf) == -1)
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err(1, "Cannot stat `%s'", argv[1]);
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(void)strlcpy(name, _PATH_DEV, sizeof(name));
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if ((dirp = opendir(name)) == NULL)
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err(1, "Cannot opendir `%s'", argv[1]);
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while ((dp = readdir(dirp)) != NULL) {
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(void)strlcpy(name + dl - 1, dp->d_name, sizeof(name) - dl + 1);
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if (stat(name, &devstat) == -1)
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err(1, "Cannot stat `%s'", name);
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if (stbuf.st_dev == devstat.st_rdev &&
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S_ISBLK(devstat.st_mode))
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break;
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}
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if (dp == NULL)
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errx(1, "Cannot find dev 0%o corresponding to %s",
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stbuf.st_rdev, argv[1]);
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/*
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* The filesystem is mounted; use the character device instead.
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* XXX - Assume that prepending an `r' will give us the name of
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* the character device.
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*/
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name[dl - 1] = 'r';
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(void)strlcpy(name + dl, dp->d_name, sizeof(name) - dl);
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(void)closedir(dirp); /* now *dp is invalid */
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if ((fsi = open(name, O_RDONLY)) == -1)
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err(1, "Cannot open `%s'", argv[1]);
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fs = &sblock;
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for (i = 0; ; i++) {
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if (sblock_try[i] == -1)
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errx(1, "%s: bad superblock", name);
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rdfs(sblock_try[i], SBLOCKSIZE, fs);
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switch (fs->fs_magic) {
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case FS_UFS2_MAGIC:
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is_ufs2 = 1;
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/* FALLTHROUGH */
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case FS_UFS1_MAGIC:
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break;
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case FS_UFS2_MAGIC_SWAPPED:
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is_ufs2 = 1;
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/* FALLTHROUGH */
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case FS_UFS1_MAGIC_SWAPPED:
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needswap = 1;
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ffs_sb_swap(fs, fs);
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break;
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default:
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continue;
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}
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/* Ensure we don't use 1st alternate if ffsv1 and bs=64k */
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if (is_ufs2 || fs->fs_old_flags & FS_FLAGS_UPDATED) {
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if (fs->fs_sblockloc != sblock_try[i])
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continue;
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} else {
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if (sblock_try[i] == SBLOCK_UFS2)
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continue;
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}
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break;
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}
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dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
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for (argc -= 2, argv += 2; argc > 0; argc--, argv++) {
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number = atoi(*argv);
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if (chkuse(number, 1))
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continue;
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if (mknod(*argv, S_IFMT|S_IRUSR|S_IWUSR,
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(dev_t)dbtofsb(fs, number)) == -1) {
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warn("Cannot mknod `%s'", *argv);
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errs++;
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continue;
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}
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did++;
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}
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if (did)
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warnx("Don't forget to run `fsck %s'", name);
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else
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warnx("File system `%s' was not modified", name);
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return errs;
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}
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static int
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chkuse(off_t blkno, int cnt)
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{
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int cg;
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off_t fsbn, bn, fsbe;
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fsbn = dbtofsb(fs, blkno);
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fsbe = fsbn + cnt;
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if (fsbe > fs->fs_size) {
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warnx("block %lld out of range of file system",
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(long long)blkno);
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return 1;
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}
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cg = (int)dtog(fs, fsbn);
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if (fsbn < cgdmin(fs, cg)) {
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if (cg == 0 || fsbe > cgsblock(fs, cg)) {
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warnx("block %lld in superblock area: cannot attach",
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(long long)blkno);
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return 1;
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}
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} else {
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if (fsbe > cgbase(fs, cg + 1)) {
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warnx("block %lld in beyond end of cylinder group: "
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"cannot attach", (long long)blkno);
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return 1;
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}
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}
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rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, &acg);
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if (!cg_chkmagic(&acg, needswap)) {
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warnx("cg %d: bad magic number", cg);
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errs++;
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return 1;
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}
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bn = dtogd(fs, fsbn);
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if (isclr(cg_blksfree(&acg, needswap), bn))
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warnx("Warning: sector %lld is in use", (long long)blkno);
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return 0;
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}
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/*
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* read a block from the file system
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*/
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static void
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rdfs(off_t bno, size_t size, void *bf)
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{
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int n;
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if (lseek(fsi, bno * dev_bsize, SEEK_SET) == -1)
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err(1, "seek error at block %lld", (long long)bno);
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switch (n = read(fsi, bf, size)) {
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case -1:
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err(1, "read error at block %lld", (long long)bno);
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break;
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default:
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if (n == size)
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return;
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errx(1, "incomplete read at block %lld", (long long)bno);
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}
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}
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