There are a couple of options.

One option is to create a thread for each file you want to monitor. If you go this route, check out the Thread::Queue module. You should run a search on this site for many good starting points. BrowserUK has given lots of advise and examples.

A second option is to monitor a directory and then make a copy if you receive an modification event. There is a module Win32::ReadDirectoryChangesW which will tell you which file was modified and allow you to respond. It is a wrapper around the Win32 API ReadDirectoryChangesW. It is not on CPAN but can be found on this site - so you will need to copy and paste the module into your personal library directory.

An short example, pieced from how I have used this module (untested). 

use strict;
use warnings;

use Win32::ReadDirectoryChangesW;

my $path    = 'c:/directory';
my $subtree = 1;
my $filter  = FILE_ACTION_ADDED | FILE_ACTION_MODIFIED;

my $rdc = Win32::ReadDirectoryChangesW->new(path   => $path,
                                            subtree => 1,
                                            filter  => $filter);
  
my @results = $rdc->read_changes;

while (scalar @results) {

   my ($action, $filename) = splice(@results, 0, 2);
 
   if ($action == FILE_ACTION_ADDED || $action == FILE_ACTION_MODIFIED
+) {

      # perform your backup here

   }

}

[download]

There is also a third option if you have more than one directory which would be to use both methods 1 and 2.

In reply to Re: File::Monitor problem with batch files by tokpela
in thread File::Monitor problem with batch files by xbmy

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