usage

usage () {
	echo "$PROGNAME: usage: $PROGNAME [-f file | -i]"
	return
}

# process command line options

interactive=
filename=

while [[ -n "$1" ]]; do
	case "$1" in
		-f | --file)	shift
						filename="$1"
						;;
		-i | --interactive)	interactive=1
							;;
		-h | --help)	usage
						exit
						;;
		*)	usage >&2
			exit 1
			;;
	esac
	shift
done