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Hello,

again: please do not cross-post or double post. The relevant developers are monitoring this list and will receive your requests. Also, you will not gain faster support by asking the same question every 3 hours.

In TUDOS DEMO CD , we have seen a tutorial about DSweeper.

http://demo.tudos.org/dsweeper_tutorial.html

It demonstrates how to destroy all data in a particular hard disk partition. But I have no got any source code with the CD downloaded from http://demo.tudos.org/eng_download.html

Then I have downloaded from svn repository by

$ svn co -N http://svn.tudos.org/repos/tudos/trunk tudos $ cd tudos $ ./repomgr co all

I have got all the modules and build them using

cd l4 make O=/build_directory

But I have not found some modules like bddf, l4ata, backdrop, dsweeper in "build_directory" or "l4/packages" directory. Among these packages, I think l4ata is in /tudos/l4/pkg/dde/fbsd/lib . But I cant build l4ata by running make in that directory.

True, BDDF and dsweeper are not in our public SVN.

l4ata and backdrop are. Please get yourself acquainted with tools such as find(1) and grep(1), they will help you exploring the SVN tree.

I have seen that it is possible to write in a partition in following DSweeper tutorial:

http://demo.tudos.org/dsweeper_tutorial.html

But I am not finding any API refrenece or source code of example to do it. I want to read/write using l4 in any filesystem.

Kind of hard. BDDF, dsweeper and l4ata were demos that were built on top of L4 three years ago and are not actively developed anymore (which is why parts of them don't appear in our public SVN).

You can use L4ATA's code as a source of information if you want to find out how to incorporate an existing disk driver into L4. If you then have more specific questions on what to do, feel free to ask.

Unfortunately we don't have the capacity to provide you with a fully working file system implementation immediately.

Cheers, Bjoern