return &value, err
}

func IoctlSetRTCWkAlrm(fd int, value *RTCWkAlrm) error {
	return ioctlPtr(fd, RTC_WKALM_SET, unsafe.Pointer(value))
}

// IoctlGetEthtoolDrvinfo fetches ethtool driver information for the network
// device specified by ifname.
func IoctlGetEthtoolDrvinfo(fd int, ifname string) (*EthtoolDrvinfo, error) {
	ifr, err := NewIfreq(ifname)
	if err != nil {
		return nil, err
	}

func (ifr *Ifreq) clear() {
	for i := range ifr.raw.Ifru {
		ifr.raw.Ifru[i] = 0
	}
}

// TODO(mdlayher): export as IfreqData? For now we can provide helpers such as
// IoctlGetEthtoolDrvinfo which use these APIs under the hood.

// An ifreqData is an Ifreq which carries pointer data. To produce an ifreqData,
// use the Ifreq.withData method.
type ifreqData struct {
	name [IFNAMSIZ]byte