Getting Notification when disk space cross a threshold value
 

I am writing a programm on linux ( ubuntu)

i have a requirement that when the available disk ( hard disk ) space crosses a certain limit ( specified by me ) , then i should get a call back from the OS . can somebody tell me how to do that ?

I want this notification to come when any of the disks ( C drive , D Drive ... ) free space cross a specified thrreshold value.

confusing ...
you say linux and you also say 'C' and 'D' drive which is more unique to dos-like operating systems.
If you really want to keep a watch on disk space you can use this link
http://www.cyberciti.biz/tips/shell-...isk-space.html

do you want to mount 'C','D' drives of some other machines using samba into a central machine
and watch them ? The above script will anyway work for almost all the mounted cases.

Sorry for the confusion ,

I mean, i want to get notification from OS whevent the free space for any of the "mounted drives" goes below a threshold value .

Did you even read the script ?.
Won't take much to modify it - perhaps you should make some effort to do it yourself.

See here for an example.