Unable to change the 'name' field from 'ext3_dir_entry_2' structure.

ashish mahamuni ashitpro at yahoo.co.in
Mon Mar 24 06:42:57 UTC 2008

Oh sir,
This is not any university problem set or project.
It really dont have any practical real-life use.
This is not a root kit or any malware.

I just want to learn the file system(ext2/ext3).
I know there are number of books on filesystem,but my way of learning is bit different. I don't like thearotical ways. I like practical implementions. 
So I thought why not to start with some little tool like hiding file.
If you don't like my idea,then suggest me somthing different which has some practical use.


--- On Mon, 24/3/08, Theodore Tso <tytso at MIT.EDU> wrote:

> From: Theodore Tso <tytso at MIT.EDU>
> Subject: Re: Unable to change the 'name' field from 'ext3_dir_entry_2' structure.
> To: "ashish mahamuni" <ashitpro at yahoo.co.in>
> Cc: ext3-users at redhat.com
> Date: Monday, 24 March, 2008, 5:49 AM
> On Sun, Mar 23, 2008 at 11:43:02PM +0530, ashish mahamuni
> wrote:
> > 
> > ok..
> > I'll find some other way to hide the
> file/directory..
> > Can you suggest me the better and secure way to modify
> the dentry?
> > I mean, which one should I modify? On disk structure
> or kernel cache(I guess this is what we called as memory
> data structure).
> > Certainly this question is not only for dentry. The
> case should  be common while modifying other data
> structures also.
> So what's the high level problem?  *Why* are you trying
> to hide file
> names or directories?
> I repeat, is this for a university problem set or project?
> Or is there a practical real-life use for it.  If so,
> *what* is the
> practical real-life use?  What are you trying accomplish at
> the high
> level, and why is it useful to try to hide filenames or
> directories?
> Is this for a root kit, where you are trying to write
> malware?  
>    	      	   	      	      	     - Ted

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