Yum wrapper for using CentOS DVD as repository

yumdvd.sh

#!/bin/bash
#Script to install packages via yum using DVD/CD as Repository
#Works on RedHat Enterprise Linux/CentOS/Scientific Linux versions above 4.0

#Change this to the location of your CD-ROM drive
cdrom=/dev/cdrom
#This location is searched by the DVD repository configuration script
mnt_point=/media/cdrom
#This is the DVD repository for CentOS 6. Change this to "c5-media" for CentOS 5. Please refer to the respective manuals for other OSes.
dvdrepo=c6-media

output=$(mount | grep $mnt_point | cut -d\  -f3)
#NOTE: in the above line there must be two spaces after cut -d\

#Mount the DVD/CD containing packages if not already mounted
if [ "$output" != "$mnt_point" ]
then
	mount -t auto $cdrom $mnt_point
	#Check if DVD/CD was mounted or not
	output=$(mount | grep $mnt_point | cut -d\  -f3)
	if [ "$output" != "$mnt_point" ]
	then
		echo "$cdrom cannot be mounted on $mnt_point"
		exit 1
	else
		echo "$cdrom mounted successfully on $mnt_point"
	fi
else
	echo "$cdrom is already mounted on $mnt_point"
fi

#Install the packages from DVD/CD by disabling all repositories and enabling the DVD/CD repository
if [ "$1" == "install" ] then
	yum --disablerepo=\* --enablerepo=$dvdrepo install $2
elif ["$1" == "groupinstall" ]
then
	yum --disablerepo=\* --enablerepo=$dvdrepo groupinstall $2
else
	echo "Usage: $0 install[groupinstall] <package/group name>"
	umount $mnt_point
	exit 1
fi

#Unmount the DVD/CD
umount $mnt_point

#Exit successfully
exit 0