Интерактивная система просмотра системных руководств (man-ов)
fsdb (8)
fsdb (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
>> fsdb (8) ( FreeBSD man: Команды системного администрирования )
BSD mandoc
NAME
fsdb
- FFS debugging/editing tool
SYNOPSIS
[-d
]
[-f
]
[-r
]
fsname
DESCRIPTION
The
utility opens
fsname
(usually a raw disk partition) and runs a command loop
allowing manipulation of the file system's inode data.
You are prompted
to enter a command with
fsdb (inum X)>
where
X
is the currently selected i-number.
The initial selected inode is the
root of the file system (i-number 2).
The command processor uses the
editline(3)
library, so you can use command line editing to reduce typing if desired.
When you exit the command loop, the file system superblock is marked
dirty and any buffered blocks are written to the file system.
The following options are available:
-d
Enable additional debugging output (which comes primarily from
fsck(8)Ns-derived
code).
-f
Left for historical reasons and has no meaning.
-r
Open the file system read/only, and disables all commands that would
write to it.
COMMANDS
Besides the built-in
editline(3)
commands,
supports these commands:
help
Print out the list of accepted commands.
inode i-number
Select inode
i-number
as the new current inode.
back
Revert to the previously current inode.
clri i-number
Clear
i-number
lookup name
cd name
Find
name
in the current directory and make its inode the current inode.
Name
may be a multi-component name or may begin with slash to indicate that
the root inode should be used to start the lookup.
If some component
along the pathname is not found, the last valid directory encountered is
left as the active inode.
This command is valid only if the starting inode is a directory.
active
print
Print out the active inode.
blocks
Print out the block list of the active inode.
Note that the printout can become long for large files, since all
indirect block pointers will also be printed.
findblk disk_block_number ...
Find the inode(s) owning the specified disk block(s) number(s).
Note that these are not absolute disk blocks numbers, but offsets from the
start of the partition.
uplink
Increment the active inode's link count.
downlink
Decrement the active inode's link count.
linkcount number
Set the active inode's link count to
number
ls
List the current inode's directory entries.
This command is valid only
if the current inode is a directory.
rm name
del name
Remove the entry
name
from the current directory inode.
This command is valid only
if the current inode is a directory.
ln ino name
Create a link to inode
ino
under the name
name
in the current directory inode.
This command is valid only
if the current inode is a directory.
chinum dirslot inum
Change the i-number in directory entry
dirslot
to
inum
chname dirslot name
Change the name in directory entry
dirslot
to
name
This command cannot expand a directory entry.
You can only rename an
entry if the name will fit into the existing directory slot.
chtype type
Change the type of the current inode to
typeType
may be one of:
filedirsocket
or
fifo
chmod mode
Change the mode bits of the current inode to
mode
You cannot change the file type with this subcommand; use
chtype
to do that.
chflags flags
Change the file flags of the current inode to
flags
chown uid
Change the owner of the current inode to
uid
chgrp gid
Change the group of the current inode to
gid
chgen gen
Change the generation number of the current inode to
gen
btime time
mtime time
ctime time
atime time
Change the creation (birth), modification, change, or access
time (respectively) on the current inode to
timeTime
should be in the format
YYYYMMDDHHMMSS[.nsec]
where
nsec
is an optional nanosecond specification.
If no nanoseconds are specified, the
birthnsecmtimensecctimensec
or
atimensec
field will be set to zero.
Note that
btime
is available on UFS2 file systems only.
The
utility uses the source code for
fsck(8)
to implement most of the file system manipulation code.
The remainder of
first appeared in
Nx ,
written by
An John T. Kohl .
An Peter Wemm
ported it to
Fx .
BUGS
Manipulation of ``short'' symlinks has no effect.
In particular, one should not
try changing a symlink's type.
You must specify modes as numbers rather than symbolic names.
There are a bunch of other things that you might want to do which
does not implement.
WARNING
Use this tool with extreme caution--you can damage an FFS file system
beyond what
fsck(8)
can repair.
