KFS(3) KFS(3)
NAME
kfs - disk file system
SYNOPSIS
bind -b '#Kcons' /dev
/dev/kfscons
/dev/kfsctl
bind '#Kfsname' dir
DESCRIPTION
Kfs implements a hierarchical Inferno file system within an
existing file, including disk partitions or flash memory.
It uses the same file system format as the kfs command of
Plan 9. The kfsctl file accepts two requests:
ream fsname file
Create the file system fsname by writing an empty file
system image to file. The amount of available space in
the file system is limited by the size of file.
filsys fsname file [option ...]
Access an existing file system image residing in file
and make its contents available as file system fsname.
The valid options are: ro, which makes the file system
readonly, and flash, which suppresses updates to file
and directory access times to reduce the number of
writes to flash.
The file kfscons accepts `console' commands to control kfs's
operation; see kfscmd(8).
EXAMPLES
Create an empty file system named fs in the file kfs.file.
Because the file system will be no larger than the existing
file's size, and the file is assumed not to be a device
file, use zeros(1) to prepare a file with 2048 blocks of
1024 bytes each:
zeros 1024 2048 >kfs.file
echo ream fs kfs.file > '#Kcons/kfsctl'
Once a file system image has been created by ream, subse-
quent initialisation requests should use filsys:
echo filsys fs kfs.file >'#Kcons/kfsctl'
In either case, the new filesystem can be bound into the
namespace with bind(1):
Page 1 Plan 9 (printed 4/25/24)
KFS(3) KFS(3)
bind -c '#Kfs’ /n/local
The contents of the file system can be provided by using
commands such as mkdir(1), cp(1) and rm(1) in /n/local, or
built from a description using mkfs(8).
The file system must be shut down cleanly using halt:
echo cfs fs >'#Kcons/kfscons'
echo halt >'#Kcons/kfscons'
SEE ALSO
zeros(1), dd(1), kfscmd(8), mkfs(8)
BUGS
It would probably be better to implement it in Limbo.
Page 2 Plan 9 (printed 4/25/24)