start()
{
    if ! [ -f /dev/gps0 ]; then
        mount -o remount,rw /
        ln -fs "$cfg_gpspps_dev" /dev/gps0
        mount -o remount,ro /
    fi

    if ! [ -f /dev/gpspps0 ]; then
        mount -o remount,rw /
        ln -fs /dev/pps0 /dev/gpspps0
        mount -o remount,ro /
    fi

    /usr/bin/ldattach PPS /dev/gps0
    /usr/bin/ntpd -g -c /etc/ntp/gpspps.cfg
}

stop()
{
    killall ntpd
    killall ldattach
}