...making Linux just a little more fun!
Smit Jadhav [smitjadhav19 at gmail.com]
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 email@example.com firstname.lastname@example.org
Kapil Hari Paranjape [kapil at imsc.res.in]
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 file-system.
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 ways.
The "cowdancer" Debian package implements the "preload" way.
The "aufs" and "unionfs" kernel modules implements it the file-system way.
All three programs are available under FOSS licenses. May the source be with you!