openwrt-packages/net/vnstat/files/vnstat.defaults

#!/bin/sh

wan="$(uci -P/var/state get network.wan.ifname)"

if [ -n "$wan" ]; then
	uci -q batch <<-EOF >/dev/null
		del_list vnstat.@vnstat[-1].interface=$wan
		add_list vnstat.@vnstat[-1].interface=$wan
		commit vnstat
	EOF
fi

exit 0