pool=`echo "$filesystem" | awk -F '/' '{ print $1 }'`
if [ -z "$filesystem" ] || [ -z "$mountpoint" ] || [ -z "$numsnapshots" ] || [ -z "$maxagedays" ]; then
pool=`echo "$filesystem" | awk -F '/' '{ print $1 }'`
if [ -z "$filesystem" ] || [ -z "$mountpoint" ] || [ -z "$numsnapshots" ] || [ -z "$maxagedays" ]; then