#!/usr/local/bin/perl -w # force taint checks, and print warnings
use strict;
use File::Find;

my $Start_dir = shift;

die ">$Start_dir< is not a directory\n" if ! -d $Start_dir;

find(\&process, $Start_dir);

sub process {
    return if -d $File::Find::name;
    return if -f $File::Find::name; # This is success - the file exists
    print ">$File::Find::name< is not a file or was not found\n";
<p>}