#!perl -w

#

# Copyright (c) 2010 Symbian Foundation Ltd

# This component and the accompanying materials are made available

# under the terms of the License "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Symbian Foundation Ltd - initial contribution.

# 

# Contributors:

#

# Description:

# Find and output the drive letter mapped to the physical volume with the

# largest amount of free space

# 

use strict;

# Use Windows command to list physical volumes on the machine

# (No substed drives, or mapped network drives)

my @drives = map {chomp;$_} `echo list volume | diskpart`;

my %drives;

for my $driveLine (@drives)

{

	# If this line of output is actually about a healthy HD volume...

	if ($driveLine =~ m{^\s+Volume \d+\s+([A-Z]).*?(Partition|RAID-5)\s+\d+ [A-Z]+\s+Healthy} )

	{

		my $letter = $1;

		# Ignore the system drive

		next if ($driveLine =~ m{System\s*$});

		# Use dir to get the freespace (bytes)

		my @bytesFree = grep { s{^.*?(\d+) bytes free\s*$}{$1} } map {chomp;$_} `cmd /c dir /-C $letter:\\`;

		# Take the value from the bottom of the report

		my $bytesFree = $bytesFree[-1];

		# Record info for this volume

		$drives{$letter} = $bytesFree;

	}

}

die "Unable to find any suitable drives at all\n" unless %drives;

# Switch keys and values

%drives = reverse %drives;

# Sort by space to find the volume with the largest amount of space and print out the corresponding letter

print "$drives{(reverse sort keys %drives)[0]}:\n";