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- // Copyright 2021 The Go Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style
- // license that can be found in the LICENSE file.
- package unix
- import (
- "runtime"
- "unsafe"
- )
- // IoctlRetInt performs an ioctl operation specified by req on a device
- // associated with opened file descriptor fd, and returns a non-negative
- // integer that is returned by the ioctl syscall.
- func IoctlRetInt(fd int, req uint) (int, error) {
- ret, _, err := Syscall(SYS_IOCTL, uintptr(fd), uintptr(req), 0)
- if err != 0 {
- return 0, err
- }
- return int(ret), nil
- }
- func IoctlGetUint32(fd int, req uint) (uint32, error) {
- var value uint32
- err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
- return value, err
- }
- func IoctlGetRTCTime(fd int) (*RTCTime, error) {
- var value RTCTime
- err := ioctl(fd, RTC_RD_TIME, uintptr(unsafe.Pointer(&value)))
- return &value, err
- }
- func IoctlSetRTCTime(fd int, value *RTCTime) error {
- err := ioctl(fd, RTC_SET_TIME, uintptr(unsafe.Pointer(value)))
- runtime.KeepAlive(value)
- return err
- }
- func IoctlGetRTCWkAlrm(fd int) (*RTCWkAlrm, error) {
- var value RTCWkAlrm
- err := ioctl(fd, RTC_WKALM_RD, uintptr(unsafe.Pointer(&value)))
- return &value, err
- }
- func IoctlSetRTCWkAlrm(fd int, value *RTCWkAlrm) error {
- err := ioctl(fd, RTC_WKALM_SET, uintptr(unsafe.Pointer(value)))
- runtime.KeepAlive(value)
- return err
- }
- type ifreqEthtool struct {
- name [IFNAMSIZ]byte
- data unsafe.Pointer
- }
- // IoctlGetEthtoolDrvinfo fetches ethtool driver information for the network
- // device specified by ifname.
- func IoctlGetEthtoolDrvinfo(fd int, ifname string) (*EthtoolDrvinfo, error) {
- // Leave room for terminating NULL byte.
- if len(ifname) >= IFNAMSIZ {
- return nil, EINVAL
- }
- value := EthtoolDrvinfo{
- Cmd: ETHTOOL_GDRVINFO,
- }
- ifreq := ifreqEthtool{
- data: unsafe.Pointer(&value),
- }
- copy(ifreq.name[:], ifname)
- err := ioctl(fd, SIOCETHTOOL, uintptr(unsafe.Pointer(&ifreq)))
- runtime.KeepAlive(ifreq)
- return &value, err
- }
- // IoctlGetWatchdogInfo fetches information about a watchdog device from the
- // Linux watchdog API. For more information, see:
- // https://www.kernel.org/doc/html/latest/watchdog/watchdog-api.html.
- func IoctlGetWatchdogInfo(fd int) (*WatchdogInfo, error) {
- var value WatchdogInfo
- err := ioctl(fd, WDIOC_GETSUPPORT, uintptr(unsafe.Pointer(&value)))
- return &value, err
- }
- // IoctlWatchdogKeepalive issues a keepalive ioctl to a watchdog device. For
- // more information, see:
- // https://www.kernel.org/doc/html/latest/watchdog/watchdog-api.html.
- func IoctlWatchdogKeepalive(fd int) error {
- return ioctl(fd, WDIOC_KEEPALIVE, 0)
- }
- // IoctlFileCloneRange performs an FICLONERANGE ioctl operation to clone the
- // range of data conveyed in value to the file associated with the file
- // descriptor destFd. See the ioctl_ficlonerange(2) man page for details.
- func IoctlFileCloneRange(destFd int, value *FileCloneRange) error {
- err := ioctl(destFd, FICLONERANGE, uintptr(unsafe.Pointer(value)))
- runtime.KeepAlive(value)
- return err
- }
- // IoctlFileClone performs an FICLONE ioctl operation to clone the entire file
- // associated with the file description srcFd to the file associated with the
- // file descriptor destFd. See the ioctl_ficlone(2) man page for details.
- func IoctlFileClone(destFd, srcFd int) error {
- return ioctl(destFd, FICLONE, uintptr(srcFd))
- }
- type FileDedupeRange struct {
- Src_offset uint64
- Src_length uint64
- Reserved1 uint16
- Reserved2 uint32
- Info []FileDedupeRangeInfo
- }
- type FileDedupeRangeInfo struct {
- Dest_fd int64
- Dest_offset uint64
- Bytes_deduped uint64
- Status int32
- Reserved uint32
- }
- // IoctlFileDedupeRange performs an FIDEDUPERANGE ioctl operation to share the
- // range of data conveyed in value from the file associated with the file
- // descriptor srcFd to the value.Info destinations. See the
- // ioctl_fideduperange(2) man page for details.
- func IoctlFileDedupeRange(srcFd int, value *FileDedupeRange) error {
- buf := make([]byte, SizeofRawFileDedupeRange+
- len(value.Info)*SizeofRawFileDedupeRangeInfo)
- rawrange := (*RawFileDedupeRange)(unsafe.Pointer(&buf[0]))
- rawrange.Src_offset = value.Src_offset
- rawrange.Src_length = value.Src_length
- rawrange.Dest_count = uint16(len(value.Info))
- rawrange.Reserved1 = value.Reserved1
- rawrange.Reserved2 = value.Reserved2
- for i := range value.Info {
- rawinfo := (*RawFileDedupeRangeInfo)(unsafe.Pointer(
- uintptr(unsafe.Pointer(&buf[0])) + uintptr(SizeofRawFileDedupeRange) +
- uintptr(i*SizeofRawFileDedupeRangeInfo)))
- rawinfo.Dest_fd = value.Info[i].Dest_fd
- rawinfo.Dest_offset = value.Info[i].Dest_offset
- rawinfo.Bytes_deduped = value.Info[i].Bytes_deduped
- rawinfo.Status = value.Info[i].Status
- rawinfo.Reserved = value.Info[i].Reserved
- }
- err := ioctl(srcFd, FIDEDUPERANGE, uintptr(unsafe.Pointer(&buf[0])))
- // Output
- for i := range value.Info {
- rawinfo := (*RawFileDedupeRangeInfo)(unsafe.Pointer(
- uintptr(unsafe.Pointer(&buf[0])) + uintptr(SizeofRawFileDedupeRange) +
- uintptr(i*SizeofRawFileDedupeRangeInfo)))
- value.Info[i].Dest_fd = rawinfo.Dest_fd
- value.Info[i].Dest_offset = rawinfo.Dest_offset
- value.Info[i].Bytes_deduped = rawinfo.Bytes_deduped
- value.Info[i].Status = rawinfo.Status
- value.Info[i].Reserved = rawinfo.Reserved
- }
- return err
- }
- func IoctlHIDGetDesc(fd int, value *HIDRawReportDescriptor) error {
- err := ioctl(fd, HIDIOCGRDESC, uintptr(unsafe.Pointer(value)))
- runtime.KeepAlive(value)
- return err
- }
- func IoctlHIDGetRawInfo(fd int) (*HIDRawDevInfo, error) {
- var value HIDRawDevInfo
- err := ioctl(fd, HIDIOCGRAWINFO, uintptr(unsafe.Pointer(&value)))
- return &value, err
- }
- func IoctlHIDGetRawName(fd int) (string, error) {
- var value [_HIDIOCGRAWNAME_LEN]byte
- err := ioctl(fd, _HIDIOCGRAWNAME, uintptr(unsafe.Pointer(&value[0])))
- return ByteSliceToString(value[:]), err
- }
- func IoctlHIDGetRawPhys(fd int) (string, error) {
- var value [_HIDIOCGRAWPHYS_LEN]byte
- err := ioctl(fd, _HIDIOCGRAWPHYS, uintptr(unsafe.Pointer(&value[0])))
- return ByteSliceToString(value[:]), err
- }
- func IoctlHIDGetRawUniq(fd int) (string, error) {
- var value [_HIDIOCGRAWUNIQ_LEN]byte
- err := ioctl(fd, _HIDIOCGRAWUNIQ, uintptr(unsafe.Pointer(&value[0])))
- return ByteSliceToString(value[:]), err
- }
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