808a36ef65
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
238 lines
6.0 KiB
Groff
238 lines
6.0 KiB
Groff
.\" $NetBSD: fsdb.8,v 1.2 1995/10/08 23:18:08 thorpej Exp $
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.\"
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.\" Copyright (c) 1995 John T. Kohl
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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.\" DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd September 14, 1995
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.Dt FSDB 8
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.Os FreeBSD
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.Sh NAME
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.Nm fsdb
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.Nd FFS debugging/editing tool
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.Sh SYNOPSIS
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.Nm
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.Op Fl d
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.Op Fl f
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.Ar fsname
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.Sh DESCRIPTION
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.Nm
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opens
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.Ar fsname
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(usually a raw disk partition) and runs a command loop
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allowing manipulation of the file system's inode data. You are prompted
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to enter a command with
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.Ic "fsdb (inum X)>"
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where
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.Va X
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is the currently selected i-number. The initial selected inode is the
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root of the filesystem (i-number 2).
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The command processor uses the
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.Xr libedit 3
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library, so you can use command line editing to reduce typing if desired.
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When you exit the command loop, the file system superblock is marked
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dirty and any buffered blocks are written to the file system.
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.Pp
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The
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.Fl d
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option enables additional debugging output (which comes primarily from
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.Xr fsck 8 -derived
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code).
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.Pp
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The
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.Fl f
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option is left for historical reasons and has no meaning.
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.Sh COMMANDS
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Besides the built-in
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.Xr libedit 3
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commands,
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.Nm
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supports these commands:
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.Pp
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.Bl -tag -width indent -compact
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.It Cm help
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Print out the list of accepted commands.
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.Pp
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.It Cm inode Ar i-number
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Select inode
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.Ar i-number
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as the new current inode.
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.Pp
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.It Cm back
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Revert to the previously current inode.
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.Pp
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.It Cm clri
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Clear the current inode.
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.Pp
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.It Cm lookup Ar name
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.It Cm cd Ar name
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Find
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.Ar name
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in the current directory and make its inode the current inode.
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.Ar Name
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may be a multi-component name or may begin with slash to indicate that
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the root inode should be used to start the lookup. If some component
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along the pathname is not found, the last valid directory encountered is
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left as the active inode.
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.br
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This command is valid only if the starting inode is a directory.
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.Pp
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.It Cm active
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.It Cm print
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Print out the active inode.
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.Pp
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.It Cm uplink
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Increment the active inode's link count.
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.Pp
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.It Cm downlink
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Decrement the active inode's link count.
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.Pp
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.It Cm linkcount Ar number
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Set the active inode's link count to
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.Ar number .
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.Pp
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.It Cm ls
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List the current inode's directory entries. This command is valid only
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if the current inode is a directory.
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.Pp
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.It Cm rm Ar name
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.It Cm del Ar name
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Remove the entry
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.Ar name
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from the current directory inode. This command is valid only
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if the current inode is a directory.
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.Pp
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.It Cm ln Ar ino Ar name
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Create a link to inode
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.Ar ino
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under the name
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.Ar name
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in the current directory inode. This command is valid only
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if the current inode is a directory.
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.Pp
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.It Cm chinum Ar dirslot Ar inum
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Change the i-number in directory entry
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.Ar dirslot
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to
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.Ar inum .
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.Pp
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.It Cm chname Ar dirslot Ar name
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Change the name in directory entry
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.Ar dirslot
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to
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.Ar name .
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This command cannot expand a directory entry. You can only rename an
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entry if the name will fit into the existing directory slot.
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.Pp
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.It Cm chtype Ar type
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Change the type of the current inode to
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.Ar type .
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.Ar type
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may be one of:
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.Em file ,
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.Em dir ,
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.Em socket ,
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or
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.Em fifo .
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.Pp
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.It Cm chmod Ar mode
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Change the mode bits of the current inode to
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.Ar mode .
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You cannot change the file type with this subcommand; use
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.Ic chtype
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to do that.
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.Pp
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.It Cm chflags Ar flags
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Change the file flags of the current inode to
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.Ar flags .
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.Pp
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.It Cm chown Ar uid
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Change the owner of the current inode to
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.Ar uid .
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.Pp
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.It Cm chgrp Ar gid
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Change the group of the current inode to
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.Ar gid .
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.Pp
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.It Cm chgen Ar gen
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Change the generation number of the current inode to
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.Ar gen .
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.Pp
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.It Cm mtime Ar time
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.It Cm ctime Ar time
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.It Cm atime Ar time
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Change the modification, change, or access time (respectively) on the
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current inode to
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.Ar time .
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.Ar Time
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should be in the format
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.Em YYYYMMDDHHMMSS[.nsec]
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where
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.Em nsec
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is an optional nanosecond specification. If no nanoseconds are specified, the
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.Va mtimensec ,
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.Va ctimensec ,
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or
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.Va atimensec
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field will be set to zero.
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.Pp
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.It Cm quit, Cm q, Cm exit, Em <EOF>
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Exit the program.
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.El
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.Sh SEE ALSO
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.Xr libedit 3 ,
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.Xr fs 5 ,
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.Xr clri 8 ,
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.Xr fsck 8
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.Sh BUGS
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Manipulation of ``short'' symlinks doesn't work (in particular, don't
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try changing a symlink's type).
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.br
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You must specify modes as numbers rather than symbolic names.
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.br
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There are a bunch of other things that you might want to do which
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.Nm
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doesn't implement.
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.br
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The
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.Xr libedit 3
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reference page is not yet written.
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.Sh HISTORY
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.Nm
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uses the source code for
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.Xr fsck 8
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to implement most of the file system manipulation code. The remainder of
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.Nm
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first appeared in NetBSD, written by John T. Kohl.
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.br
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Peter Wemm ported it to FreeBSD.
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.Sh WARNING
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Use this tool with extreme caution--you can damage an FFS file system
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beyond what
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.Xr fsck 8
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can repair.
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