#!/usr/bin/perl -wT

use strict;
use File::Spec;
use Data::Dumper qw(Dumper);

use constant PATH => '/One/Two/Three';

#split up the path into directory segments
my @dirs = File::Spec->splitdir(PATH);

my @paths;

while(my $path = File::Spec->catfile(@dirs)) {
  push @paths, $path;
  pop @dirs;
}

print Dumper(\@paths);

##</code><code>##

$VAR1 = [
          '/One/Two/Three',
          '/One/Two',
          '/One'
        ];