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3 .\" Copyright (c) 1995 John T. Kohl
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29 .\" $FreeBSD: src/sbin/fsdb/fsdb.8,v 1.12.2.8 2003/02/23 20:17:15 trhodes Exp $
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32 .Dd September 14, 1995
37 .Nd FFS debugging/editing tool
49 (usually a raw disk partition) and runs a command loop
50 allowing manipulation of the file system's inode data. You are prompted
51 to enter a command with
55 is the currently selected i-number. The initial selected inode is the
56 root of the file system (i-number 2).
57 The command processor uses the
59 library, so you can use command line editing to reduce typing if desired.
60 When you exit the command loop, the file system superblock is marked
61 dirty and any buffered blocks are written to the file system.
63 The following options are available:
64 .Bl -tag -width indent
66 Enable additional debugging output (which comes primarily from
67 .Xr fsck 8 Ns -derived
70 Left for historical reasons and has no meaning.
72 Open the file system read/only, and disables all commands that would
80 supports these commands:
82 .Bl -tag -width indent -compact
84 Print out the list of accepted commands.
86 .It Cm inode Ar i-number
89 as the new current inode.
92 Revert to the previously current inode.
94 .It Cm clri Ar i-number
102 in the current directory and make its inode the current inode.
104 may be a multi-component name or may begin with slash to indicate that
105 the root inode should be used to start the lookup. If some component
106 along the pathname is not found, the last valid directory encountered is
107 left as the active inode.
108 This command is valid only if the starting inode is a directory.
112 Print out the active inode.
115 Print out the block list of the active inode.
116 Note that the printout can become long for large files, since all
117 indirect block pointers will also be printed.
119 Increment the active inode's link count.
122 Decrement the active inode's link count.
124 .It Cm linkcount Ar number
125 Set the active inode's link count to
129 List the current inode's directory entries. This command is valid only
130 if the current inode is a directory.
136 from the current directory inode. This command is valid only
137 if the current inode is a directory.
139 .It Cm ln Ar ino Ar name
140 Create a link to inode
144 in the current directory inode. This command is valid only
145 if the current inode is a directory.
147 .It Cm chinum Ar dirslot Ar inum
148 Change the i-number in directory entry
153 .It Cm chname Ar dirslot Ar name
154 Change the name in directory entry
158 This command cannot expand a directory entry. You can only rename an
159 entry if the name will fit into the existing directory slot.
161 .It Cm chtype Ar type
162 Change the type of the current inode to
173 Change the mode bits of the current inode to
175 You cannot change the file type with this subcommand; use
179 .It Cm chflags Ar flags
180 Change the file flags of the current inode to
184 Change the owner of the current inode to
188 Change the group of the current inode to
192 Change the generation number of the current inode to
198 Change the modification, change, or access time (respectively) on the
202 should be in the format
203 .Em YYYYMMDDHHMMSS[.nsec]
206 is an optional nanosecond specification. If no nanoseconds are specified, the
211 field will be set to zero.
213 .It Cm quit , q , exit , Em <EOF>
224 utility uses the source code for
226 to implement most of the file system manipulation code. The remainder of
237 Use this tool with extreme caution--you can damage an FFS file system
242 Manipulation of ``short'' symlinks doesn't work (in particular, don't
243 try changing a symlink's type).
245 You must specify modes as numbers rather than symbolic names.
247 There are a bunch of other things that you might want to do which