How can the kernel notify which is the current running application ?
 

Hi,
i need to develop a daemon (user space) which needs to know which is current running application. How can i get notifications from the kernel?
Someone told me there are a thousand ways.
Who can suggest me a bunch of possibly solutions?

Thanks

This stuff is available in /proc/<PID>/stat

You can also see what is in the running state using ps (ps aux for example).

Your daemon will check which is the running application; when it does this, it will be running, so it will be the running application, no?

Yeah, but i don't want to check it.
I want the kernel notify me everytime the current running one changes. Is it possible?

Realistically, no. The computer would simply be spending all of its time sendng you notifications. (An you'd spend all of the computer's time processing them.) :)