Async Sleep?

[Lawrence D'Oliveiro]

In article <e1s2h1$m07$1 at ss405.t-com.hr>,
 "Aleksandar Cikota" <alexci at web.de> wrote:

>How to check this every 10 sec, but that the CPU is free?

Or better still, why not set a notification on the directory, so you're 
woken up every time something happens to it?

Look up the inotify mechanism, which was added in version 2.6.13 of the 
Linux kernel.