#!/bin/bash
# version 1.2
# 20240626 IWT added XFS support
# version 1.1
# 20180307 IWT added logger

# 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

tmp=$(which logger 2>/dev/null)
if [[ '0' == $? ]]
 then
   LOGGER=$(which logger)
 else
   LOGGER='echo'
 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 $2}' | tr '[:upper:]' '[:lower:]')
        fssubtype=$(file -sL $2 | awk '{print $3}' | tr '[:upper:]' '[:lower:]')
		# fs=$(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 [[ $fstype == "reiserfs" ]]
		   then
			echo "lvextend -L +${1}G ${2}"
			lvextend -L +${1}G ${2}
			echo "resize_reiserfs -s +${1}G ${2}"
			resize_reiserfs -s +${1}G ${2}
            dt=$(date '+%Y%m%d-%H%M')
            echo "${dt} $1 $2" >> /var/log/increasefs.log
            ${LOGGER} "increaseFS ${dt} $1 $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 ${2}
            dt=$(date '+%Y%m%d-%H%M')
            echo "${dt} $1 $2" >> /var/log/increasefs.log
            ${LOGGER} "increaseFS ${dt} $1 $2"
		elif [[ $fstype == "sgi" ]] && [[ $fssubtype == "xfs" ]]
		   then
			echo "lvextend -L +${1}G ${2}"
			lvextend -L +${1}G ${2}
			echo "xfs_growfs ${2}"
			xfs_growfs ${2}
            dt=$(date '+%Y%m%d-%H%M')
            echo "${dt} $1 $2" >> /var/log/increasefs.log
            ${LOGGER} "increaseFS ${dt} $1 $2"
		else
			echo "Unknown filesystem type"
		fi
	else
		echo "$2 does not exsist"
	fi

fi