Also punched out a web version.

#!/usr/bin/perl -T
use strict;
use warnings;
use CGI qw/:standard/;

# Clean up our UNIX environment
# for more infor read perldoc perlsec
$ENV{'PATH'} = '/bin:/usr/bin';
delete @ENV{qw(IFS CDPATH ENV BASH_ENV)};

my ($x,$pp,$mb,$fs,@MSG);

print header,start_html;
print "<h3><center><tt>AIX 512 byte block calculator</center></h3>\n",
+br,hr,br;
print start_form;
print p,"From an AIX commandline type lsvg \<vgname>\n",br;
print "You should see output looking something like the following:\n",
+br;
print p,"<pre>
VOLUME GROUP:   rootvg                   VG IDENTIFIER:  000345df7dda4
+98a
VG STATE:       active                   PP SIZE:        32 megabyte(s
+)
VG PERMISSION:  read/write               TOTAL PPs:      1084 (34688 m
+egabytes)
MAX LVs:        256                      FREE PPs:       797 (25504 me
+gabytes)
LVs:            10                       USED PPs:       287 (9184 meg
+abytes)
OPEN LVs:       8                        QUORUM:         1
TOTAL PVs:      2                        VG DESCRIPTORS: 3
STALE PVs:      0                        STALE PPs:      0
ACTIVE PVs:     1                        AUTO ON:        yes
MAX PPs per PV: 1016                     MAX PVs:        32
</pre>",br;

print p,"The fields we are interested in here are <b>PP SIZE</b>, and 
+<b>FREE PPs</b>\n",br;
print "Enter the PP SIZE and the number of MB (Mega Bytes) you want to
+ enlarg your system by, below.\n",br;
print "Enter the name of your filesystem in the final textfield and hi
+t submit.\n",br;
print "The AIX command that you will need to enter at the command line
+ as the root user will be displayed.\n",br;

print p,"Physical Partition Size in MB\n",br;
print textfield('PP'),br;

print p,"Size to grow FS by in MB\n",br;
print textfield('MB'),br;

print p,"AIX Filesystem name\n",br;
print textfield('FS'),p,submit;

$pp=param('PP');
$mb=param('MB');
$fs=param('FS');

if ( $pp && $mb ) {
        print p,"<b>chfs -a size=+";
        $x = ( $mb <= $pp )
                ? print 2 * (1024 * $pp)
                : print (2 * (1024 * $mb)) - (2 * $pp);
        print " /$fs</b></tt>\n";
} else {
        print "",br;
}
print br,end_html;
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