From 3f96c1fbfd631f660a5ec10a3685de0faf636a54 Mon Sep 17 00:00:00 2001
From: Kirk McKusick <mckusick@ucbvax.Berkeley.EDU>
Date: Thu, 24 Feb 1983 22:28:27 -0800
Subject: [PATCH] update for new file system

SCCS-vsn: sbin/badsect/badsect.c 4.3
---
 usr/src/sbin/badsect/badsect.c | 144 ++++++++++++++++++++++++++++++---
 1 file changed, 135 insertions(+), 9 deletions(-)

diff --git a/usr/src/sbin/badsect/badsect.c b/usr/src/sbin/badsect/badsect.c
index 45dfa9ce15..f53e2caedf 100644
--- a/usr/src/sbin/badsect/badsect.c
+++ b/usr/src/sbin/badsect/badsect.c
@@ -1,4 +1,4 @@
-static	char *sccsid = "@(#)badsect.c	4.2 (Berkeley) 81/05/11";
+static	char *sccsid = "@(#)badsect.c	4.3 (Berkeley) 83/02/24";
 
 /*
  * badsect
@@ -10,20 +10,146 @@ static	char *sccsid = "@(#)badsect.c	4.2 (Berkeley) 81/05/11";
  * this program can be used if the driver for the file system in question
  * does not support bad block forwarding.
  */
+#include <stdio.h>
 #include <sys/param.h>
+#include <sys/fs.h>
+#include <sys/dir.h>
+#include <sys/stat.h>
+#include <sys/inode.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;
+
+char buf[MAXBSIZE];
+
 
 main(argc, argv)
 	int argc;
-	char **argv;
+	char *argv[];
 {
-	char nambuf[32];
-	int errs = 0;
+	daddr_t number;
+	struct stat stbuf, devstat;
+	register struct direct *dp;
+	DIR *dirp;
+	int fd;
+	char name[BUFSIZ];
 
-	--argc, argv++;
-	while (argc > 0) {
-		if (mknod(*argv, 0, atoi(*argv) / CLSIZE))
-			perror("mknod"), errs++;
-		argc--, argv++;
+	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, "/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(SBLOCK, SBSIZE, (char *)fs);
+	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);
 }
+
+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 (acg.cg_magic != CG_MAGIC) {
+		fprintf(stderr, "cg %d: bad magic number\n", cg);
+		errs++;
+		return;
+	}
+	bn = dtogd(fs, fsbn);
+	if (isclr(acg.cg_free, bn))
+		printf("Warning: sector %d is in use\n", blkno);
+	return (0);
+}
+
+/*
+ * read a block from the file system
+ */
+rdfs(bno, size, bf)
+	int bno, size;
+	char *bf;
+{
+	int n;
+
+	if (lseek(fsi, bno * DEV_BSIZE, 0) < 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);
+	}
+}
-- 
2.20.1