#!/usr/bin/perl -w

use strict;
use Data::Dumper;

sub data_for_path {
  my $path = shift;
  if (-f $path or -l $path) {     #files or symbolic links
   return undef;
  }
  if (-d $path) {
    my %directory;
    opendir PATH, $path or die "cannot opendir $path: $!";
    my @names = readdir PATH;
    closedir PATH;
    for my $name (@names) {
     next if $name eq '.' or $name eq '..';
     $directory{$name} = data_for_path("$path/$name");
    }
    return \%directory;
  }
  warn "$path is neither a file nor a directory\n";
  return undef;
}

print Dumper(data_for_path('.'));

##</code><code>##

$VAR1 = {
          'perl.1' => undef,
          'bin' => {
                     'perl.1' => undef,
                     'chaos.1' => undef
                   },
          'perl.sub_sub' => undef,
          'perl.sub_multi' => undef,
          'chaos.1' => undef,
          'perl.filehandle' => undef,
          'man' => {},
          'lib' => {
                     'yahoo3' => {
                                   'yahoo3' => {
                                                 'yahoo1111' => undef
                                               },
                                   'yahoo5' => undef
                                 },
                     'yahoo2' => undef,
                     'yahoo' => undef
                   },
          'perl.log' => undef,
          'perl.recursive_data' => undef,
          'perl.callbacks' => undef
        };