in reply to Monitoring directory contents

Would in not be simpler to let rsync take the strain e.g. (neither tried nor tested) ... 
my @files = `rsync <rysnc_args_and_opts>`;
system "<parser_name> @files";

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which I guess you could just as easily implement in shell (again, neither tried nor tested) ... 
for F in `rsync <rysnc_args_and_opts>`; do
    <parser_name> $F
done

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A user level that continues to overstate my experience :-))

In Section Seekers of Perl Wisdom