Shell Programming and Scripting

#!/bin/bash
#Unexport all nfs directories
echo unexporting nfs directories!
exportfs -au
#check to make sure unexport was successful!
exportfs -v
#umount BACKUPS
umount -v /BACKUPS
#replace the old drive with a new one
echo "Do you wish to continue? (y/n)"
read ans

case $ans in
     Y|y) ;;
[Yy][Ee][Ss]) ;;
     N|n) exit ;;
[Nn][Oo]) exit ;;
       *) echo "Invalid command"
esac
#partiton and create new filesystem on the drive
# run fdisk to make sure we are using /dev/sdc
echo "RUNNING FDISK TO SEE IF /DEV/SDC IS THE CORRECT DRIVE!"
fdisk -l

echo "Are you ready to run fdisk? (y/n)"
read ans

case $ans in
     Y|y) ;;
[Yy][Ee][Ss]) ;;
     N|n) exit ;;
[Nn][Oo]) exit ;;
       *) echo "Invalid command"
esac
echo "ABOUT TO CREATE THE NEW PARTITION!!!!!!!!!!!!!"
fdisk /dev/sdc < ~/250GB_format.txt

#check to see if the OS automounted the disk
echo #CHECKING TO SEE IF FEDORA AUTOMOUNTED THE DRIVE!!!!!!!!!!!!!!!!"
umount -v /dev/sdc1

#create the new filesystem
echo "ABOUT TO CREATE THE FILESYSTEM!!!!!!!!!!!!!!!!!!!"
mkfs.ext3 /dev/sdc1

#mount the new file system
echo "MOUNT THE FILESYSTEM!!!!!!!!"
mount -v /dev/sdc1 /BACKUPS


#run df to see that the filesystem is mounted an reporting the correct size
df -h

echo "Is the disk mounted and showing the correct partition size? (y/n)"
read ans

case $ans in
     Y|y) ;;
[Yy][Ee][Ss]) ;;
     N|n) exit ;;
[Nn][Oo]) exit ;;
       *) echo "Invalid command"
esac
#get the UUID to add to fstab
echo "GRAB THE BLOCKID"
blkid /dev/sdc1

#export the filesystems
echo "EXPORTING /BACKUPS"
exportfs -av

yes_no()
{
        message="$1"
        while :
        do
              echo "$message [y,n] (default n)"
              read ans
              case ${ans:=n} in
                    N*|n*) return 1 ;;
                    Y*|y*) return 0 ;;
                    *) echo "You have entered an invalid option. Please pick correctly"
              esac
        done
}

if yes_no "Do you want to continue?" ;then
        # Got yes so run fdisk
         fdisk blah blah....
else
        # Exit
        echo "You chose no, or a problem has occurred"
        exit 2
fi

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