Linux::Inotify2 (for Linux, as the name implies). There's a similar one for Windows  (I just can't remember the name — but someone else will tell) — update: looked it up: Win32::ChangeNotify.

pktrain posted some related sample code a while ago, which is certainly worth looking at...

In reply to Re: Monitering set of files by almut
in thread Monitering set of files by vinoth.ree

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