Try rhino-shell as login shell

cleanup_rish.sh

#!/bin/sh -x
rm -rf /opt/rhino
sed -i -e "s/\/opt\/rhino\/rish//g" /etc/shells

install_rish.sh

#!/bin/sh -x
RHINO_ROOT=/opt/rhino

if [ -d ${RHINO_ROOT} ]; then
	echo "sorry! there's already ${RHINO_ROOT}"
	exit 1
fi

if [ -f /tmp/rhino.zip ]; then
	echo "sorry! there's already /tmp/rhino.zip"
	exit 1
fi

mkdir -p ${RHINO_ROOT}
curl ftp://ftp.mozilla.org/pub/mozilla.org/js/rhino1_7R2.zip > /tmp/rhino.zip
cd ${RHINO_ROOT};unzip /tmp/rhino.zip
rm /tmp/rhino.zip
echo "#!/bin/sh\njava -jar /opt/rhino/rhino1_7R2/js.jar" > ${RHINO_ROOT}/rish
chmod +x /opt/rhino/rish
echo /opt/rhino/rish >> /etc/shells
echo "\nrhino shell is ready at /opt/rhino/rish."