#!/bin/bash
# echo ${1} ${2}
# echo "lvextend -L +${1}G ${2}"
# echo "resize_reiserfs -s +${1}G ${2}" 

if [[ -e /usr/sbin/ext2online ]]
   then	
	ext2expand="/usr/sbin/ext2online"
elif [[ -e /sbin/resize2fs ]]
  then 
	ext2expand="/sbin/resize2fs"
fi

if [[ -z $1 || -z $2 ]]
  then
    echo "Usage: increasefs.ksh {size in Gigs} {location of lv}"
    echo "Example: 'increasefs.ksh 20 /dev/mirr01vg/fedoralv' increases the fedoralv by 20G"
else

	if [[ -e $2 ]]
	   then
                fstype=$(file -sL $2 | awk '{print $2}')
		# fs=$(ls -l $2 | awk '{ print $11 }')
		# echo "fs=[${fs}]"
		# fstype=$( mount | grep $fs | awk '{ print $5 }')
		# echo "[$fstype]"
                if [[ $fstype == 'Linux' ]]
                 then
                    fstype=$(file -sL $2 | awk '{print $5}')
                 fi
		if [[ $fstype == "reiserfs" ]] || [[ $fstype == 'ReiserFS' ]]
		   then
			echo "lvextend -L +${1}G ${2}"
			lvextend -L +${1}G ${2}
			echo "resize_reiserfs -s +${1}G ${2}"
			resize_reiserfs -s +${1}G ${2}
		elif [[ $fstype == "ext3" ]] || [[ $fstype == "ext4" ]]
		   then
			 echo "lvextend -L +${1}G ${2}"
			 lvextend -L +${1}G ${2}
			 echo "ext2online ${2}"
			 $ext2expand ${2}
			 tune2fs -r 10000 ${2}
		else
			echo "Unknown filesystem type"
		fi
	else
		echo "$2 does not exsist"
	fi

fi