aflag=
bflag=

while getopts :ac name "$@"
do
	case $name in
	a)	aflag=1 ;;
	c)	cflag=1 ;;
	?)	exit 2;;
	esac

	# this came in in a bug report -- it's really a usage error
	# but it shouldn't cause the shell to crash
	shift
done

if [ ! -z "$aflag" ] ; then echo -a specified ; fi
if [ ! -z "$cflag" ] ; then echo -c specified ; fi

if [ "$OPTIND" -gt 1 ]
then
	shift $(( $OPTIND - 1 ))
fi

echo remaining args: "$*"

exit 0