_ifscheme()
{
	cur=${COMP_WORDS[COMP_CWORD]}
	schemes=$( cat /etc/network/interfaces | grep "iface.*-.*inet" | cut -d ' ' -f 2 | cut -d '-' -f 2 | sort )
	COMPREPLY=( $( compgen -W "$schemes" -- $cur ) )
}
complete -F _ifscheme ifscheme
