#!/bin/bash

# This scrip makes some evil assumptions:
#
# o That the disk was partitioned as 120 Gigs
# o That the real disk size will be reported as numGB (in Gigs)
#   (i.e. this wont work if parted decides to display it in terabytes
#   or megabytes on some disks)
#

OUTPATTERN="Disk /dev/hdb: "
DISKOUT=`parted /dev/hdb print | grep "$OUTPATTERN"`

DISKSIZE=${DISKOUT#$OUTPATTERN}

echo "this disk size is $DISKSIZE"

echo "that would be ${DISKSIZE%GB} Gigs I think"

DISKGIGS=${DISKSIZE%GB}

if [ $DISKGIGS -gt 120 ]; then
	# Found a disk that is physically bigger than 120GB

	# Resize the extended partition to span till the end of the disk
	parted /dev/hdb resize 4 3208MB $DISKSIZE

	# Create /dev/hdb7 with the remaining disk space
	parted /dev/hdb mkpart logical 120GB $DISKSIZE

	# XXX massgaol dissapears here for a few secs....
	sleep 2
	vgscan

        # Give the system some time to create the fs nodes needed
        # to proceed
        sleep 5

	# Create a physical volume for 
	pvcreate -y -ff /dev/hdb7

	# Adding more ...
	sleep 2

        # Scan volume groups... needed to make 'massgaol' recognized
	# in the next step.
        vgscan

	# Add new physical volume to the volume group
	vgextend massgaol /dev/hdb7

	# Get the current size of the virtual group now...
	# (get the 12'th field, separated by ':').
	VGSIZE=`vgdisplay -c massgaol | cut -d : -f12`

	# Activate the group -- this creates /dev/massgaol/massgaolLV
	vgchange -ay 

	# Extend the logical volume to span the entire volume group
	lvextend /dev/massgaol/massgaolLV -L${VGSIZE}KB

	# Resize sometimes wants an fsck first.
	e2fsck -f /dev/massgaol/massgaolLV

	# Resize the overlying filesystem
	resize2fs /dev/massgaol/massgaolLV

        # deactivate the group for now
	vgchange -an

fi