start()
{
    flags=''

    if [ -n "$cfg_ptpd_master" ]; then
        flags='-gW'
    else
        flags='-g'
    fi

    /usr/bin/ptpd2 $flags -b "$cfg_ptpd_interface"
}

stop()
{
    if [ -c /dev/rtc0 ]; then
        hwclock -w
    fi

    killall ptpd2 > /dev/null 2>&1
}