#!/usr/bin/lua

function neighbourcount()
    local handle = io.popen("batctl n | grep ibss0 | wc -l")
    local result = handle:read("*a")
    handle:close()
    return result
end

function ifstate()
    local file = io.open("/sys/class/net/client0/operstate", "r")
    local result = file:read("*l")
    file:close()
    return result
end

state = ifstate()
if neighbourcount() == 0 then
    if state == "up" then
        os.execute("ip link set down dev client0")
    end
else
    if state == "down" then
        os.execute("ip link set up dev client0")
    end
end