#!/usr/bin/perl -w

#By Neil Watson on 08/18/01 (watson-wilson.ca)

#Usage filehog <directory>

use strict;
use warnings;
use File::Find;
use CGI qw(:standard);

#change this for the locale of final report:
my $repdir = "/home/neil";

my @field;
my $dir = $ARGV[0];
my $host = `hostname`;
chomp($host); 
my @date = split(/\s+/, `date`);
chomp($date[5]);

#input
open(RAW, ">/tmp/filehog") || die "Could not open /tmp/filehog";

#calls sub wanted
find(\&wanted, $dir);

close(RAW);

#output
open(HTML, ">$repdir/hogs_$host.html") || die "Could not open $repdir/hogs_$host.html";
print HTML start_html("Space Hogs on server $host for $date[0], $date[1] $date[2] $date[5]");
print HTML h1("Space Hogs on server <i>$host</i> for$ date[0], $date[1] $date[2] $date[5]")."\n\n";
print HTML h3("These people are shamefully using more than their fair share of disk space.  Hopefully, under this public scrutiny, they will change their greedy ways.");

print HTML "\n<hr>";
print HTML "\n<table>\n";
print HTML "<tr>\n";
print HTML "\t<th>Size (MB)<th>\n";
print HTML "\t<th>File Name and Location<th>\n";
print HTML "\t<th>File Owner<th>\n";
print HTML "<tr>\n";

#sort RAW data
system "sort -nr /tmp/filehog|head>/tmp/filehog_sort";

#write final report
open(RAW, "/tmp/filehog_sort") || die "Could not open /tmp/filehog_sort";
while (<RAW>) {
	chomp;
	s/^\s*//;
	@field = split(/,/, $_);
	$field[2] = `grep x:$field[2] /etc/passwd|cut -d: -f1`;
	chomp($field[2]);

	print HTML "<tr>\n";
	print HTML "\t<td>$field[0]<td>\n";
	print HTML "\t<td>$field[1]<td>\n";
	print HTML "\t<td>$field[2]<td>\n";
	print HTML "<tr>\n";
}
close(RAW);

print HTML "</table>";
print HTML end_html();
close(HTML);

system "rm -f /tmp/filehog /tmp/filehog_sort";

sub wanted {
	my $uid = (lstat($_))[4];
	my $size = (lstat($_))[7];
	$size = $size/1000000;

	printf RAW "%5.1f", $size;
	print RAW ",$File::Find::name,$uid\n";

}