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
"When I'm working on a problem, I never think about beauty. I think only how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong." -Richard Buckminster Fuller
If I understand your problem, I can solve it! Of course, the same can be said for you.
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