_addpart_module()
{
	local cur prev
	COMPREPLY=()
	cur="${COMP_WORDS[COMP_CWORD]}"
	case $COMP_CWORD in
		1)
			OPTS="--help --version $(lsblk -pnro name)"
			COMPREPLY=( $(compgen -W "${OPTS[*]}" -- $cur) )
			;;
		2)
			# FIXME: how to determine next free partition number
			;;
		3)
			COMPREPLY=( $(compgen -W "start" -- $cur) )
			;;
		4)
			COMPREPLY=( $(compgen -W "length" -- $cur) )
			;;
	esac
	return 0
}
complete -F _addpart_module addpart