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-rw-r--r--sbin/badsect/Makefile6
-rw-r--r--sbin/badsect/badsect.8132
-rw-r--r--sbin/badsect/badsect.c209
3 files changed, 347 insertions, 0 deletions
diff --git a/sbin/badsect/Makefile b/sbin/badsect/Makefile
new file mode 100644
index 0000000..ff9f4f1
--- /dev/null
+++ b/sbin/badsect/Makefile
@@ -0,0 +1,6 @@
+# @(#)Makefile 8.1 (Berkeley) 6/5/93
+
+PROG= badsect
+MAN8= badsect.0
+
+.include <bsd.prog.mk>
diff --git a/sbin/badsect/badsect.8 b/sbin/badsect/badsect.8
new file mode 100644
index 0000000..840011d
--- /dev/null
+++ b/sbin/badsect/badsect.8
@@ -0,0 +1,132 @@
+.\" Copyright (c) 1985, 1991, 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.
+.\"
+.\" @(#)badsect.8 8.1 (Berkeley) 6/5/93
+.\"
+.Dd June 5, 1993
+.Dt BADSECT 8
+.Os BSD 4
+.Sh NAME
+.Nm badsect
+.Nd create files to contain bad sectors
+.Sh SYNOPSIS
+.Nm /etc/badsect
+.Ar bbdir sector ...
+.Sh DESCRIPTION
+.Nm Badsect
+makes a file to contain a bad sector. Normally, bad sectors
+are made inaccessible by the standard formatter, which provides
+a forwarding table for bad sectors to the driver; see
+.Xr bad144 8
+for details.
+If a driver supports the bad blocking standard it is much preferable to
+use that method to isolate bad blocks, since the bad block forwarding
+makes the pack appear perfect, and such packs can then be copied with
+.Xr dd 1 .
+The technique used by this program is also less general than
+bad block forwarding, as
+.Nm badsect
+can't make amends for
+bad blocks in the i-list of file systems or in swap areas.
+.Pp
+On some disks,
+adding a sector which is suddenly bad to the bad sector table
+currently requires the running of the standard
+.Tn DEC
+formatter.
+Thus to deal with a newly bad block
+or on disks where the drivers
+do not support the bad-blocking standard
+.Nm badsect
+may be used to good effect.
+.Pp
+.Nm Badsect
+is used on a quiet file system in the following way:
+First mount the file system, and change to its root directory.
+Make a directory
+.Li BAD
+there. Run
+.Nm badsect
+giving as argument the
+.Ar BAD
+directory followed by
+all the bad sectors you wish to add.
+(The sector numbers must be relative to the beginning of
+the file system, but this is not hard as the system reports
+relative sector numbers in its console error messages.)
+Then change back to the root directory, unmount the file system
+and run
+.Xr fsck 8
+on the file system. The bad sectors should show up in two files
+or in the bad sector files and the free list. Have
+.Xr fsck
+remove files containing the offending bad sectors, but
+.Em do not
+have it remove the
+.Pa BAD/ Ns Em nnnnn
+files.
+This will leave the bad sectors in only the
+.Li BAD
+files.
+.Pp
+.Nm Badsect
+works by giving the specified sector numbers in a
+.Xr mknod 2
+system call,
+creating an illegal file whose first block address is the block containing
+bad sector and whose name is the bad sector number.
+When it is discovered by
+.Xr fsck
+it will ask
+.Dq Li "HOLD BAD BLOCK ?"
+A positive response will cause
+.Xr fsck
+to convert the inode to a regular file containing the bad block.
+.Sh SEE ALSO
+.Xr bad144 8 ,
+.Xr fsck 8 ,
+.Xr format 8
+.Sh DIAGNOSTICS
+.Nm Badsect
+refuses to attach a block that
+resides in a critical area or is out of range of the file system.
+A warning is issued if the block is already in use.
+.Sh BUGS
+If more than one sector which comprise a file system fragment are bad,
+you should specify only one of them to
+.Nm badsect ,
+as the blocks in the bad sector files actually cover all the sectors in a
+file system fragment.
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.1 .
diff --git a/sbin/badsect/badsect.c b/sbin/badsect/badsect.c
new file mode 100644
index 0000000..fa978b1
--- /dev/null
+++ b/sbin/badsect/badsect.c
@@ -0,0 +1,209 @@
+/*
+ * 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 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 char sccsid[] = "@(#)badsect.c 8.1 (Berkeley) 6/5/93";
+#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/dir.h>
+#include <sys/stat.h>
+
+#include <ufs/ffs/fs.h>
+#include <ufs/ufs/dinode.h>
+
+#include <fcntl.h>
+#include <paths.h>
+#include <stdio.h>
+#include <stdlib.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 __P((daddr_t, int, char *));
+int chkuse __P((daddr_t, int));
+
+int
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ daddr_t number;
+ struct stat stbuf, devstat;
+ register struct direct *dp;
+ DIR *dirp;
+ char name[BUFSIZ];
+
+ if (argc < 3) {
+ fprintf(stderr, "usage: badsect bbdir blkno [ blkno ]\n");
+ exit(1);
+ }
+ if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) {
+ perror(argv[1]);
+ exit(2);
+ }
+ strcpy(name, _PATH_DEV);
+ if ((dirp = opendir(name)) == NULL) {
+ perror(name);
+ exit(3);
+ }
+ while ((dp = readdir(dirp)) != NULL) {
+ strcpy(&name[5], dp->d_name);
+ if (stat(name, &devstat) < 0) {
+ perror(name);
+ exit(4);
+ }
+ if (stbuf.st_dev == devstat.st_rdev &&
+ (devstat.st_mode & IFMT) == IFBLK)
+ break;
+ }
+ closedir(dirp);
+ if (dp == NULL) {
+ printf("Cannot find dev 0%o corresponding to %s\n",
+ stbuf.st_rdev, argv[1]);
+ exit(5);
+ }
+ if ((fsi = open(name, 0)) < 0) {
+ perror(name);
+ exit(6);
+ }
+ 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 = atoi(*argv);
+ if (chkuse(number, 1))
+ continue;
+ if (mknod(*argv, IFMT|0600, dbtofsb(fs, number)) < 0) {
+ perror(*argv);
+ errs++;
+ }
+ }
+ printf("Don't forget to run ``fsck %s''\n", name);
+ exit(errs);
+}
+
+int
+chkuse(blkno, cnt)
+ daddr_t blkno;
+ int cnt;
+{
+ int cg;
+ daddr_t fsbn, bn;
+
+ fsbn = dbtofsb(fs, blkno);
+ if ((unsigned)(fsbn+cnt) > fs->fs_size) {
+ printf("block %d out of range of file system\n", blkno);
+ return (1);
+ }
+ cg = dtog(fs, fsbn);
+ if (fsbn < cgdmin(fs, cg)) {
+ if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) {
+ printf("block %d in non-data area: cannot attach\n",
+ blkno);
+ return (1);
+ }
+ } else {
+ if ((fsbn+cnt) > cgbase(fs, cg+1)) {
+ printf("block %d in non-data area: cannot attach\n",
+ 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 %d is in use\n", blkno);
+ return (0);
+}
+
+/*
+ * read a block from the file system
+ */
+void
+rdfs(bno, size, bf)
+ 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", bno);
+ perror("rdfs");
+ exit(1);
+ }
+ n = read(fsi, bf, size);
+ if (n != size) {
+ printf("read error: %ld\n", bno);
+ perror("rdfs");
+ exit(1);
+ }
+}
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