Attention to a part of book of 'Practical File System Design with the Be File System'
"To make it easier to explore and experiment with file systems, we designed
a file system construction kit. The kit runs at the user level and creates a file
system within a file. With the kit, a user need not have any special privileges
to run their own file system, and debugging is easy using regular source-level
debuggers. Under the BeOS and Unix, the kit can also operate on a raw disk
device if desired (to simulate more closely how it would run if it were “real”).
This appendix is not the full documentation for the file system construction
kit. It gives an overview of the data structures and the API of the kit but
does not provide the full details of how to modify it. The full documentation
can be found in the archive containing the file system construction kit.
The archive is available at
http://www.mkp.com/giampaolo/fskit.tar.gz and
ftp://mkp.com/giampaolo/fskit.tar.gz."
I try find similar this kit