[TAG] problem in coding of problem in linux
Kapil Hari Paranjape
kapil at imsc.res.in
Wed Nov 28 06:12:10 MSK 2007
On Tue, 27 Nov 2007, Smit Jadhav wrote:
> i m student in computer science . i m doing a project in linux about
> security systems
> my concept is when a user tries to open a proteected file or folder he must
> be redirected to a other file or folder specified by us
> their is some sort of linking have to be done but how i dont know pls send
> any help message on my email id
One way this can be done is to preload an alternative to the "open"
file system call.
Another way is to create a new file-system kernel module which
implements the appropriate open call for files within that particular
The "union" file-system concept is that if a file cannot/should not be
written to then a copy of this file is created in another location and
this copy is written to. This has been implemented in both the above
The "cowdancer" Debian package implements the "preload" way.
The "aufs" and "unionfs" kernel modules implements it the file-system
All three programs are available under FOSS licenses. May the source
be with you!
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