use strict;
use warnings;

my @dirs = '/';   ### Starting directory

my ($dir, $file, $path);

while ($dir = shift(@dirs)) {
    opendir(DIR, $dir);

    while ($file = readdir(DIR)) {
        next if $file =~ /^\./;
        next if $file eq 'dir.pl';   ### Name of your script

        $path = $dir . $file;

        if (-d $path) {
            push (@dirs, "$path/"); next;
        }

        ### Do something with file path
    }
}
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