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If your running Win32 then Win32::ChangeNotify makes this very easy.

#! perl -slw use strict; use Win32::ChangeNotify; my $path = 'p:\test'; my $notify = Win32::ChangeNotify->new( $path, 0, 'FILE_NAME' ); my %last; @last{ glob $path . '/*' } = (); while( 1 ) { print('Nothing changed'), next unless $notify->wait( 10_000 ); # Check every 10 seconds $notify->reset; print $/, 'Something changed'; my @files = glob $path . '/*'; if( @files < scalar keys %last ) { delete @last{ @files }; print 'These files where deleted: '; print for keys %last; print''; } elsif( @files > scalar keys %last ) { my %temp; @temp{ @files } = (); delete @temp{ keys %last }; print 'These files where created: '; print for keys %temp; print''; } else { print "A non-deletion or creation change occured"; } undef %last; @last{ @files } = (); } __END__ P:\test>changenotify Nothing changed Nothing changed Something changed These files where created: p:\test/fred Nothing changed Nothing changed Something changed These files where deleted: p:\test/fred Nothing changed Nothing changed Nothing changed Nothing changed

You'll need control-break rather than ^C to interupt this script.

To extending this to monitor the whole subtree, change the 0 in the new() call to 1, though you'll need some extra work to find out what changed where.

I'm not aware of a similar mechanism under *nix.


Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
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In reply to Re: how to permanently monitor a directory by BrowserUk
in thread how to permanently monitor a directory by LupoX

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