Shell Programming and Scripting

#!/bin/perl
use File::Find;
# Determine wether argument is given or not
# -----------------------------------------
if (@ARGV) {
@dirm = @ARGV;
foreach $dirm(@dirm) {
if ($dirm eq "\." ) {
$dirm = `pwd`;
$dirm =~ s/\n//g;
}
$dirm =~ s/\/$//g;
push(@directory, $dirm);
}
}
else {
usage();
}
# -----------------------------------------

# Define global vars and hashes
# -----------------------------------------
%seen = ();
$total = ();
$nr = 0;
$mbnr = 0;
# -----------------------------------------

# Searching starting at your given directory
foreach $directory (@directory) {
finddepth(\&wanted, $directory);
}


# If this is dir is unique, start getting total disk usage inclusive sub-dirs
# ---------------------------------------------------------------------------
sub wanted {
$dir = "$File::Find::dir";

unless ($seen{$dir}++) {
next if ( $dir =~ lost+found );
next if ( $dir eq $directory );
$dm=`du -ks $dir 2>/dev/null`;
($kb, $path) = split /\s+/, $dm ;
$mb = int( $kb / 1024 );

$output{$path} = $mb;

}
}
# -----------------------------------------

# Determine most characters of path and store it in $nr
# -----------------------------------------
@long = keys %output;
foreach $item(@long) {
if ( $nr < length($item)) {
$nr = length($item);
}
}
# -----------------------------------------


# Determine most characters of size and store it in $mbnr
# -----------------------------------------
@long = values %output;
foreach $item(@long) {
if ( $mbnr < length($item)) {
$mbnr = length($item);
}
}
# -----------------------------------------

# Add a space as long as the the current path is smaller then the longest one.
# -----------------------------------------
print "\n\n\n";
while (($key, $value) = each %output) {
$numb = ( $nr - length($key) );
$mbnumb = ( $mbnr - length($value) );
$dd = " Directory $key has";
while ( $numb > 0 ) {
$dd = $dd . " ";
$numb--;
}
while ( $mbnumb > 0 ) {
$dd = $dd . " ";
$mbnumb--;
}
push(@newarray, "$dd $value Mb\n");
}
# -----------------------------------------

# Print total directory size
# -----------------------------------------
foreach $line(sort(@newarray)) {
print $line;
}

print "\n\n";

foreach $directory(@directory) {
$total=`du -ks $directory 2>/dev/null`;
($total_size, $useless) = split /\s+/, $total;
$total_size_mb = int( $total_size / 1024 );
print "Total usage of $directory is $total_size_mb Mb\n";
}
print "\n\n";
# -----------------------------------------


sub usage() {
print "\ndirinfo.pl: Error incorrect usage \n\n";
print "Usage: /usr/local/bin/dirinfo.pl <directory> \n";
print "\t <directory> Is directory start point to check \n\n\n";
exit 1;
}

./space.pl /path/to/departmental_folder