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badsect.c revision 1.1.1.2
      1      1.1      cgd /*
      2  1.1.1.2  mycroft  * Copyright (c) 1981, 1983, 1993
      3  1.1.1.2  mycroft  *	The Regents of the University of California.  All rights reserved.
      4      1.1      cgd  *
      5      1.1      cgd  * Redistribution and use in source and binary forms, with or without
      6      1.1      cgd  * modification, are permitted provided that the following conditions
      7      1.1      cgd  * are met:
      8      1.1      cgd  * 1. Redistributions of source code must retain the above copyright
      9      1.1      cgd  *    notice, this list of conditions and the following disclaimer.
     10      1.1      cgd  * 2. Redistributions in binary form must reproduce the above copyright
     11      1.1      cgd  *    notice, this list of conditions and the following disclaimer in the
     12      1.1      cgd  *    documentation and/or other materials provided with the distribution.
     13      1.1      cgd  * 3. All advertising materials mentioning features or use of this software
     14      1.1      cgd  *    must display the following acknowledgement:
     15      1.1      cgd  *	This product includes software developed by the University of
     16      1.1      cgd  *	California, Berkeley and its contributors.
     17      1.1      cgd  * 4. Neither the name of the University nor the names of its contributors
     18      1.1      cgd  *    may be used to endorse or promote products derived from this software
     19      1.1      cgd  *    without specific prior written permission.
     20      1.1      cgd  *
     21      1.1      cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22      1.1      cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23      1.1      cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24      1.1      cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25      1.1      cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26      1.1      cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27      1.1      cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28      1.1      cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29      1.1      cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30      1.1      cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31      1.1      cgd  * SUCH DAMAGE.
     32      1.1      cgd  */
     33      1.1      cgd 
     34      1.1      cgd #ifndef lint
     35  1.1.1.2  mycroft static char copyright[] =
     36  1.1.1.2  mycroft "@(#) Copyright (c) 1981, 1983, 1993\n\
     37  1.1.1.2  mycroft 	The Regents of the University of California.  All rights reserved.\n";
     38      1.1      cgd #endif /* not lint */
     39      1.1      cgd 
     40      1.1      cgd #ifndef lint
     41  1.1.1.2  mycroft static char sccsid[] = "@(#)badsect.c	8.1 (Berkeley) 6/5/93";
     42      1.1      cgd #endif /* not lint */
     43      1.1      cgd 
     44      1.1      cgd /*
     45      1.1      cgd  * badsect
     46      1.1      cgd  *
     47      1.1      cgd  * Badsect takes a list of file-system relative sector numbers
     48      1.1      cgd  * and makes files containing the blocks of which these sectors are a part.
     49      1.1      cgd  * It can be used to contain sectors which have problems if these sectors
     50      1.1      cgd  * are not part of the bad file for the pack (see bad144).  For instance,
     51      1.1      cgd  * this program can be used if the driver for the file system in question
     52      1.1      cgd  * does not support bad block forwarding.
     53      1.1      cgd  */
     54      1.1      cgd #include <sys/param.h>
     55      1.1      cgd #include <sys/dir.h>
     56      1.1      cgd #include <sys/stat.h>
     57  1.1.1.2  mycroft 
     58  1.1.1.2  mycroft #include <ufs/ffs/fs.h>
     59  1.1.1.2  mycroft #include <ufs/ufs/dinode.h>
     60  1.1.1.2  mycroft 
     61  1.1.1.2  mycroft #include <fcntl.h>
     62      1.1      cgd #include <paths.h>
     63  1.1.1.2  mycroft #include <stdio.h>
     64  1.1.1.2  mycroft #include <stdlib.h>
     65  1.1.1.2  mycroft #include <unistd.h>
     66      1.1      cgd 
     67      1.1      cgd union {
     68      1.1      cgd 	struct	fs fs;
     69      1.1      cgd 	char	fsx[SBSIZE];
     70      1.1      cgd } ufs;
     71      1.1      cgd #define sblock	ufs.fs
     72      1.1      cgd union {
     73      1.1      cgd 	struct	cg cg;
     74      1.1      cgd 	char	cgx[MAXBSIZE];
     75      1.1      cgd } ucg;
     76      1.1      cgd #define	acg	ucg.cg
     77      1.1      cgd struct	fs *fs;
     78      1.1      cgd int	fso, fsi;
     79      1.1      cgd int	errs;
     80      1.1      cgd long	dev_bsize = 1;
     81      1.1      cgd 
     82      1.1      cgd char buf[MAXBSIZE];
     83      1.1      cgd 
     84  1.1.1.2  mycroft void	rdfs __P((daddr_t, int, char *));
     85  1.1.1.2  mycroft int	chkuse __P((daddr_t, int));
     86      1.1      cgd 
     87  1.1.1.2  mycroft int
     88      1.1      cgd main(argc, argv)
     89      1.1      cgd 	int argc;
     90      1.1      cgd 	char *argv[];
     91      1.1      cgd {
     92      1.1      cgd 	daddr_t number;
     93      1.1      cgd 	struct stat stbuf, devstat;
     94      1.1      cgd 	register struct direct *dp;
     95      1.1      cgd 	DIR *dirp;
     96      1.1      cgd 	char name[BUFSIZ];
     97      1.1      cgd 
     98      1.1      cgd 	if (argc < 3) {
     99      1.1      cgd 		fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n");
    100      1.1      cgd 		exit(1);
    101      1.1      cgd 	}
    102      1.1      cgd 	if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) {
    103      1.1      cgd 		perror(argv[1]);
    104      1.1      cgd 		exit(2);
    105      1.1      cgd 	}
    106      1.1      cgd 	strcpy(name, _PATH_DEV);
    107      1.1      cgd 	if ((dirp = opendir(name)) == NULL) {
    108      1.1      cgd 		perror(name);
    109      1.1      cgd 		exit(3);
    110      1.1      cgd 	}
    111      1.1      cgd 	while ((dp = readdir(dirp)) != NULL) {
    112      1.1      cgd 		strcpy(&name[5], dp->d_name);
    113      1.1      cgd 		if (stat(name, &devstat) < 0) {
    114      1.1      cgd 			perror(name);
    115      1.1      cgd 			exit(4);
    116      1.1      cgd 		}
    117      1.1      cgd 		if (stbuf.st_dev == devstat.st_rdev &&
    118      1.1      cgd 		    (devstat.st_mode & IFMT) == IFBLK)
    119      1.1      cgd 			break;
    120      1.1      cgd 	}
    121      1.1      cgd 	closedir(dirp);
    122      1.1      cgd 	if (dp == NULL) {
    123      1.1      cgd 		printf("Cannot find dev 0%o corresponding to %s\n",
    124      1.1      cgd 			stbuf.st_rdev, argv[1]);
    125      1.1      cgd 		exit(5);
    126      1.1      cgd 	}
    127      1.1      cgd 	if ((fsi = open(name, 0)) < 0) {
    128      1.1      cgd 		perror(name);
    129      1.1      cgd 		exit(6);
    130      1.1      cgd 	}
    131      1.1      cgd 	fs = &sblock;
    132      1.1      cgd 	rdfs(SBOFF, SBSIZE, (char *)fs);
    133      1.1      cgd 	dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
    134      1.1      cgd 	for (argc -= 2, argv += 2; argc > 0; argc--, argv++) {
    135      1.1      cgd 		number = atoi(*argv);
    136      1.1      cgd 		if (chkuse(number, 1))
    137      1.1      cgd 			continue;
    138      1.1      cgd 		if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) {
    139      1.1      cgd 			perror(*argv);
    140      1.1      cgd 			errs++;
    141      1.1      cgd 		}
    142      1.1      cgd 	}
    143      1.1      cgd 	printf("Don't forget to run ``fsck %s''\n", name);
    144      1.1      cgd 	exit(errs);
    145      1.1      cgd }
    146      1.1      cgd 
    147  1.1.1.2  mycroft int
    148      1.1      cgd chkuse(blkno, cnt)
    149      1.1      cgd 	daddr_t blkno;
    150      1.1      cgd 	int cnt;
    151      1.1      cgd {
    152      1.1      cgd 	int cg;
    153      1.1      cgd 	daddr_t fsbn, bn;
    154      1.1      cgd 
    155      1.1      cgd 	fsbn = dbtofsb(fs, blkno);
    156      1.1      cgd 	if ((unsigned)(fsbn+cnt) > fs->fs_size) {
    157      1.1      cgd 		printf("block %d out of range of file system\n", blkno);
    158      1.1      cgd 		return (1);
    159      1.1      cgd 	}
    160      1.1      cgd 	cg = dtog(fs, fsbn);
    161      1.1      cgd 	if (fsbn < cgdmin(fs, cg)) {
    162      1.1      cgd 		if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) {
    163      1.1      cgd 			printf("block %d in non-data area: cannot attach\n",
    164      1.1      cgd 				blkno);
    165      1.1      cgd 			return (1);
    166      1.1      cgd 		}
    167      1.1      cgd 	} else {
    168      1.1      cgd 		if ((fsbn+cnt) > cgbase(fs, cg+1)) {
    169      1.1      cgd 			printf("block %d in non-data area: cannot attach\n",
    170      1.1      cgd 				blkno);
    171      1.1      cgd 			return (1);
    172      1.1      cgd 		}
    173      1.1      cgd 	}
    174      1.1      cgd 	rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize,
    175      1.1      cgd 	    (char *)&acg);
    176      1.1      cgd 	if (!cg_chkmagic(&acg)) {
    177      1.1      cgd 		fprintf(stderr, "cg %d: bad magic number\n", cg);
    178      1.1      cgd 		errs++;
    179      1.1      cgd 		return (1);
    180      1.1      cgd 	}
    181      1.1      cgd 	bn = dtogd(fs, fsbn);
    182      1.1      cgd 	if (isclr(cg_blksfree(&acg), bn))
    183      1.1      cgd 		printf("Warning: sector %d is in use\n", blkno);
    184      1.1      cgd 	return (0);
    185      1.1      cgd }
    186      1.1      cgd 
    187      1.1      cgd /*
    188      1.1      cgd  * read a block from the file system
    189      1.1      cgd  */
    190  1.1.1.2  mycroft void
    191      1.1      cgd rdfs(bno, size, bf)
    192  1.1.1.2  mycroft 	daddr_t bno;
    193  1.1.1.2  mycroft 	int size;
    194      1.1      cgd 	char *bf;
    195      1.1      cgd {
    196      1.1      cgd 	int n;
    197      1.1      cgd 
    198  1.1.1.2  mycroft 	if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) {
    199      1.1      cgd 		printf("seek error: %ld\n", bno);
    200      1.1      cgd 		perror("rdfs");
    201      1.1      cgd 		exit(1);
    202      1.1      cgd 	}
    203      1.1      cgd 	n = read(fsi, bf, size);
    204  1.1.1.2  mycroft 	if (n != size) {
    205      1.1      cgd 		printf("read error: %ld\n", bno);
    206      1.1      cgd 		perror("rdfs");
    207      1.1      cgd 		exit(1);
    208      1.1      cgd 	}
    209      1.1      cgd }
    210