expire_backup ()
{
# This function is used to expire backups

# set -x  # Uncomment to debug this function

clear # Clear the screen

# Display the screen header and menu

echo -e "
   \n\n\t\tDIRVISH EXPIRE BACKUP(S)\n
   \n\t1) Delete Expired Backups for ALL Hosts
   \n\t2) Delete Expired Backups for One Host
   \n\t3) Expire One Backup for One Host
   \n\t4) Expire All Backups for One Host
   \n\t5) Previous Menu
   \n\n\tSelect an Option: \c"

read ANS
case $ANS in
1) echo -e "\n\tDeleting Expired Backups for ALL Hosts..."
   dirvish-expire --tree
   echo -e "\n\tTasks Complete..."
   echo -e "\n\tPress Enter to Continue...\c"
   read KEY
   ;;
2) echo -e "\n\tEnter the Hostname to Delete Expired Backups: \c"
   read H
   dirvish-expire --tree --vault $H | more
   echo -e "\n\tTasks Complete..."
   echo -e "\n\tPress Enter to Continue...\c"
   read KEY
   ;;
3) EXPIRE_STAMP="$(date "+%Y-%m-%d %H:%M:%S")"
   echo -e "\n\tEnter the Hostname for the Backup Image: \c"
   read H

   BANK_LIST=$(parse_conf)
   MYPWD=$(pwd)

   for B in $BANK_LIST
   do
      if [ -d ${B}/${H} ]
      then
          cd ${B}/${H}
          IMAGE_LIST=$(find . -type d -name "*-[0-9][0-9]*" | cut -c3-)
      fi
   done

   echo -e "\nSelect an Image to Expire from the Following List:\n"
   echo -e "\n$IMAGE_LIST" | more
   echo -e "\n\nEnter the Image to Expire: \c"
   read IMAGE_NAME

   cd $MYPWD
   if [[ -r ${B}/${H}/${IMAGE_NAME}/summary ]]
   then
      # This is where we expire a backup that is not currently
      # expired. The 'summary' file contains the expire datestamp

      echo -e "\n\tExpiring Image: $IMAGE_NAME"

      sed s/"$(grep Expire ${B}/${H}/${IMAGE_NAME}/summary)"/"$(grep Expire ${B}/${H}/${IMAGE_NAME}/summary | cut -f 1-4 -d ' ') $EXPIRE_STAMP"/g "${B}/${H}/${IMAGE_NAME}/summary" > "${B}/${H}/${IMAGE_NAME}/summary2"

      mv "${B}/${H}/${IMAGE_NAME}/summary2" "${B}/${H}/${IMAGE_NAME}/summary"
   fi

   # We expired the backups; now we ask the user if we should delete
   # the expired images

   STOP=0
   until (( STOP == 1 ))
   do
     echo -e "\n\tTasks Complete...Do You Want to Delete This Expired Image? (y/n): \c"
     read ANS
     case $ANS in
     y|Y) echo -e "\n\tDeleting Expired Image: $IMAGE_NAME"

          # This next command deletes all expired images for $H
          dirvish-expire --vault $H

          RC=$?
          echo -e "\n\tDirvish-expire Completed with Return Code: $RC"
          echo -e "\n\tTasks Complete..."
          echo -e "\n\tPress Enter to Continue...\c"
          read KEY
          STOP=1
          ;;
     n|N) STOP=1
          continue
          ;;
       *) echo -e "\n\tInvalid Entry..."
          ;;
     esac
   done
   ;;
4) EXPIRE_STAMP=$(date "+%Y-%m-%d %H:%M:%S")
   clear
   echo -e "\nEnter the Hostname for the Backup Image: \c"
   read H

   BANK_LIST=$(parse_conf)
   MYPWD=$(pwd)

   for P in $BANK_LIST
   do
      if [ -d ${P}/${H} ]
      then
         cd ${P}/${H}
         IMAGE_LIST=$(find . -type d -name "*-[0-9][0-9]*" | cut -c3-)
         B=$P
      fi
   done

   echo -e "\nSetting to Following Images to Expire:\n\n"
   echo "$IMAGE_LIST" | more
   cd $MYPWD
   echo -e "\nPress Enter to Continue...\c"

   echo "$IMAGE_LIST" | while read IMAGE_NAME
   do
     if [ -f ${B}/${H}/${IMAGE_NAME}/summary ]
     then
        echo "Expiring $IMAGE_NAME"
        sed s/"$(grep Expire ${B}/${H}/${IMAGE_NAME}/summary)"/"$(grep Expire ${B}/${H}/${IMAGE_NAME}/summary | cut -f 1-4 -d ' ') $EXPIRE_STAMP"/g "${B}/${H}/${IMAGE_NAME}/summary" > "${B}/${H}/${IMAGE_NAME}/summary2"

        if (( $? == 0 ))
        then
           mv ${B}/${H}/${IMAGE_NAME}/summary2 ${B}/${H}/${IMAGE_NAME}/summary
        fi
     fi
   done

   STOP=0
   until (( STOP == 1 ))
   do
     echo -e "\nTasks Complete...Do You Want to Delete Expired Images? (y/n): \c"
     read ANS
     case $ANS in
     y|Y) echo -e "\nDeleting Expired Images...\n"
          dirvish-expire --vault $H
          RC=$?
          echo -e "\nDirvish-expire Completed with Return Code: $RC"
          echo -e "\nTasks Complete..."
          echo -e "\nPress Enter to Continue...\c"
          read KEY
          STOP=1
          ;;
     n|N) STOP=1
          continue
          ;;
       *) echo -e "\n\tInvalid Entry..."
          ;;
     esac
   done
   ;;
5) :
   ;;
*) echo -e "\nInvalid Entry"
   ;;
esac
}