SKIPBLANKS=
TMPDIR=/tmp
CASE=lower

while getopts :bt:u arg
do
	case $arg in
		b)		SKIPBLANKS=TRUE ;;
		t)		if [ -d "$OPTARG" ]
					then
					TMPDIR=$OPTARG
				else
					print "$0: $OPTARG is not a directory." >&2
					exit 1
				fi ;;
		u)		CASE=upper ;;
		:)		print "$0: Must supply an argument to -$OPTARG." >&2
				exit 1 ;;
		\?)		print "Invalid option -$OPTARG ignored." >&2 ;;
		esac
done
shift $((OPTIND-1))