You need a way to transform the directory the file is in to the appropriate top-level directory. Use the File::Basename module, then something like: 
sub topdir {
  my($nd,$parent)=@_;
  my $d = $nd;

  # Hack; strip off trailing characters that might be directory
  # seperators
  $parent =~ s/\W$//;

  while ($nd ne $parent)
  {
    $d = $nd;
    $nd = File::Basename::dirname($d);
  }

  return $d;
}

[download]
That HACK line is in case the argument is c:\temp\ instead of just c:\temp. It should really be $dir=join("",fileparse($dir));, but that doesn't work as documented on my system.

The code to use this is: 

#!/usr/bin/perl -w

use strict;

use File::Find;
use File::Basename;

our $dir = $ARGV[0];

find(\&do_dir, $dir);

my %hash;
sub do_dir {
 my $size = -s ($File::Find::name)
     or return;
 my $d = topdir($File::Find::dir,$dir);
 if (!defined($hash{$d})) { $hash{$d} = 0; }
# warn "size=$size, d=$d\n";
 $hash{$d} += $size;
}

foreach (keys %hash) {
  print "DIR $_ = $hash{$_}\n";
}

[download]

In reply to Re: Directory size 1 level deep by sgifford
in thread Directory size 1 level deep by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.