#!/system/bin/sh

set -e -u

SCRIPTNAME=$0
show_usage () {
	echo "usage: $SCRIPTNAME [-s shell]"
	echo "Change the login shell."
}

set_shell () {
	mkdir -p $HOME/.termux
	NEW_SHELL=$1
	if test -x $PREFIX/bin/$NEW_SHELL; then
		ln -f -s $PREFIX/bin/$NEW_SHELL $HOME/.termux/shell
	elif test -x $NEW_SHELL; then
		ln -f -s $NEW_SHELL $HOME/.termux/shell
	else
		echo "Error: $NEW_SHELL is not an executable file"
	fi
}

O=`getopt -l help -- hs: "$@"`
eval set -- "$O"
while true; do
	case "$1" in
		-h|--help) show_usage; exit 0;;
		-s) set_shell $2; exit 0;;
		--)	shift; break;;
		*)	echo Error; show_usage; exit 1;;
	esac
done

echo "Error: Specify shell with the -s flag"
exit 1