231 lines
6.2 KiB
C
231 lines
6.2 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static const char copyright[] =
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"@(#) 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 const char sccsid[] = "@(#)badsect.c 8.1 (Berkeley) 6/5/93";
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#endif
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static const char rcsid[] =
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"$Id: badsect.c,v 1.5 1998/06/04 06:38:03 charnier Exp $";
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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/stat.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ufs/dinode.h>
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#include <err.h>
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#include <dirent.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 <unistd.h>
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union {
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struct fs fs;
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char fsx[SBSIZE];
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} ufs;
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#define sblock ufs.fs
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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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struct fs *fs;
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int fso, fsi;
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int errs;
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long dev_bsize = 1;
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char buf[MAXBSIZE];
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void rdfs __P((daddr_t, int, char *));
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int chkuse __P((daddr_t, int));
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static void
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usage(void)
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{
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fprintf(stderr, "usage: badsect bbdir blkno ...\n");
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exit(1);
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}
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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daddr_t diskbn;
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daddr_t number;
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struct stat stbuf, devstat;
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register struct dirent *dp;
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DIR *dirp;
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char name[2 * MAXPATHLEN];
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char *name_dir_end;
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if (argc < 3)
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usage();
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if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0)
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err(2, "%s", argv[1]);
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strcpy(name, _PATH_DEV);
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if ((dirp = opendir(name)) == NULL)
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err(3, "%s", name);
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name_dir_end = name + strlen(name);
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while ((dp = readdir(dirp)) != NULL) {
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strcpy(name_dir_end, dp->d_name);
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if (lstat(name, &devstat) < 0)
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err(4, "%s", name);
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if (stbuf.st_dev == devstat.st_rdev &&
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(devstat.st_mode & IFMT) == IFBLK)
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break;
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}
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closedir(dirp);
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if (dp == NULL) {
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printf("Cannot find dev 0%lo corresponding to %s\n",
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(u_long)stbuf.st_rdev, argv[1]);
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exit(5);
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}
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/*
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* Opening of a mounted on device is not allowed.
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* Attempt to open the raw device instead.
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*/
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memcpy(name_dir_end + 1, name_dir_end, strlen(name_dir_end) + 1);
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*name_dir_end = 'r';
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if ((fsi = open(name, O_RDONLY)) < 0)
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err(6, "%s", name);
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fs = &sblock;
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rdfs(SBOFF, SBSIZE, (char *)fs);
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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 = atol(*argv);
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if (chkuse(number, 1))
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continue;
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/*
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* Print a warning if converting the block number to a dev_t
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* will truncate it. badsect was not very useful in versions
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* of BSD before 4.4 because dev_t was 16 bits and another
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* bit was lost by bogus sign extensions.
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*/
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diskbn = dbtofsb(fs, number);
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if ((dev_t)diskbn != diskbn) {
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printf("sector %ld cannot be represented as a dev_t\n",
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(long)number);
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errs++;
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}
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else if (mknod(*argv, IFMT|0600, (dev_t)diskbn) < 0) {
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warn("%s", *argv);
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errs++;
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}
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}
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printf("Don't forget to run ``fsck %s''\n", name);
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exit(errs);
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}
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int
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chkuse(blkno, cnt)
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daddr_t blkno;
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int cnt;
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{
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int cg;
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daddr_t fsbn, bn;
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fsbn = dbtofsb(fs, blkno);
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if ((unsigned)(fsbn+cnt) > fs->fs_size) {
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printf("block %ld out of range of file system\n", (long)blkno);
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return (1);
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}
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cg = dtog(fs, fsbn);
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if (fsbn < cgdmin(fs, cg)) {
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if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) {
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printf("block %ld in non-data area: cannot attach\n",
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(long)blkno);
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return (1);
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}
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} else {
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if ((fsbn+cnt) > cgbase(fs, cg+1)) {
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printf("block %ld in non-data area: cannot attach\n",
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(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,
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(char *)&acg);
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if (!cg_chkmagic(&acg)) {
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fprintf(stderr, "cg %d: bad magic number\n", 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), bn))
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printf("Warning: sector %ld is in use\n", (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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void
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rdfs(bno, size, bf)
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daddr_t bno;
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int size;
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char *bf;
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{
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int n;
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if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) {
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printf("seek error: %ld\n", (long)bno);
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err(1, "rdfs");
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}
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n = read(fsi, bf, size);
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if (n != size) {
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printf("read error: %ld\n", (long)bno);
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err(1, "rdfs");
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}
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}
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