1 files changed, 230 insertions, 0 deletions
diff --git a/sbin/badsect/badsect.c b/sbin/badsect/badsect.c
new file mode 100644
index 0000000..4526c1b
--- /dev/null
+++ b/sbin/badsect/badsect.c
@@ -0,0 +1,230 @@
+/*
+ * 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 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 /* 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/stat.h>
+
+#include <ufs/ffs/fs.h>
+#include <ufs/ufs/dinode.h>
+
+#include <dirent.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 diskbn;
+	daddr_t number;
+	struct stat stbuf, devstat;
+	register struct dirent *dp;
+	DIR *dirp;
+	char name[2 * MAXPATHLEN];
+	char *name_dir_end;
+
+	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);
+	}
+	name_dir_end = name + strlen(name);
+	while ((dp = readdir(dirp)) != NULL) {
+		strcpy(name_dir_end, dp->d_name);
+		if (lstat(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%lo corresponding to %s\n",
+			stbuf.st_rdev, argv[1]);
+		exit(5);
+	}
+	/*
+	 * Opening of a mounted on device is not allowed.
+	 * Attempt to open the raw device instead.
+	 */
+	memcpy(name_dir_end + 1, name_dir_end, strlen(name_dir_end) + 1);
+	*name_dir_end = 'r';
+	if ((fsi = open(name, O_RDONLY)) < 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 = atol(*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",
+			       number);
+			errs++;
+		}
+		else if (mknod(*argv, IFMT|0600, (dev_t)diskbn) < 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 %ld 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 %ld in non-data area: cannot attach\n",
+				blkno);
+			return (1);
+		}
+	} else {
+		if ((fsbn+cnt) > cgbase(fs, cg+1)) {
+			printf("block %ld 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 %ld 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);
+	}
+}