KFSCMD(8) KFSCMD(8)
NAME
kfscmd, ksync - kfs administration
SYNOPSIS
disk/kfscmd [-n name] cmd ...
disk/ksync
DESCRIPTION
Kfs is a local user-level file server for a Plan 9 terminal
with a disk. Kfscmd transmits commands to the kfs server
(see kfs(4)). The -n option changes the name of the kfs ser-
vice to kfs.name (by default, full name is just kfs).
Ksync executes the sync command for all active kfs servers.
The known commands are described below. Note that some com-
mands are multiple words and should be quoted to appear as a
single argument to rc(1).
allow Turn permission checking off (to simplify adminis-
tration).
allowoff
disallow Turn permission checking on.
noauth Disable authentication of users.
halt Write all changed blocks and stop the file system.
start The opposite of halt; restart the file system.
help Print the list of commands.
rename file name
Change the name of file to name. Name may be a
single path element or a full path; if it is a
full path, every element along the path must exist
except the last.
newuser user
Add user to /adm/users and make the standard
directories needed for booting.
remove file
Remove file and place its blocks on the free list.
clri file Remove file but do not place the blocks on the
free list. This command can be used to remove
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KFSCMD(8) KFSCMD(8)
files that have duplicated blocks. The non-
duplicate blocks can be retrieved by checking the
file system with option f (see below).
create file owner group mode [adl]
Create the file. Owner and group are users in
/adm/users and mode is an octal number. If pre-
sent, `a' creates an append only file, `d' creates
a directory, and `l' creates a file that is
exclusive-use.
sync Write to disk all of the dirty blocks in the mem-
ory cache.
atime Toggle whether atimes are updated as files and
directories are accessed. By default, atimes are
updated. On laptops it can be useful to turn off
atime updates to reduce disk accesses.
stats Report statistics about the performance of the
file system.
user Re-initialize authentication information by read-
ing /adm/users.
nowritegroup
Each time kfs rereads /adm/users, it looks for a
group named write. If such a group exists, then
the entire file system will appear read-only to
users not in the group. If a write group exists
but no one is in it, it will be impossible to edit
/adm/users to correct the problem. To resolve
this, the nowritegroup command turns off write
group checking until the next time /adm/users is
reread.
cfs filsys
Change the `console' to the named file system
(default is the main system).
chat Toggle tracing of 9P messages.
check [cdfpPqrtw]
Check the file system and print summary informa-
tion. The options are
c fix bad tags and clear the contents of the
block.
d delete redundant references to a block, fix
bad UTF filenames.
f rebuild the list of free blocks.
p print the names of directories as they are
checked.
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P print the names of all files as they are
checked.
q quiet mode: report errors, but suppress sum-
mary information
r read all of the data blocks and check the
tags.
t fix bad tags.
w write all of the blocks that are touched.
listen [address]
Start a listener to serve the network at address,
default tcp!*!564. This feature is intended to
facilitate small networks of a couple machines in
the situation when convenience is more important
than performance. This command is only useful on
machines with (possibly simulated) NVRAM, which
needs to be readable to the kfs processes; see
readnvram in authsrv(2). The production file
server (see fs(4)) is strongly encouraged for any-
thing more than casual use.
noneattach
When listening to the network, the default behav-
ior is that the user none may only attach over
connections that have already authenticated as
someone else. This prevents just anyone from
being able to dial your server and attach as none.
The noneattach command toggles whether none can
attach without such a chaperone.
SOURCE
/sys/src/cmd/disk/kfscmd.c
/$objtype/bin/disk/ksync
SEE ALSO
kfs(4), mkfs(8), prep(8), sd(3)
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