// authentication.
func UnixCredentials(ucred *Ucred) []byte {
	b := make([]byte, CmsgSpace(SizeofUcred))
	h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
	h.Level = SOL_SOCKET
	h.Type = SCM_CREDENTIALS
	h.SetLen(CmsgLen(SizeofUcred))
	*(*Ucred)(h.data(0)) = *ucred
	return b
}

// ParseUnixCredentials decodes a socket control message that contains
// credentials in a Ucred structure. To receive such a message, the

		cli, err := net.FileConn(cliFile)
		if err != nil {
			t.Errorf("FileConn: %v", err)
			return
		}
		defer cli.Close()

		var ucred syscall.Ucred
		if os.Getuid() != 0 {
			ucred.Pid = int32(os.Getpid())
			ucred.Uid = 0
			ucred.Gid = 0
			oob := syscall.UnixCredentials(&ucred)
			_, _, err := cli.(*net.UnixConn).WriteMsgUnix(nil, oob, nil)
			if op, ok := err.(*net.OpError); ok {
				err = op.Err
			}

// authentication.
func UnixCredentials(ucred *Ucred) []byte {
	b := make([]byte, CmsgSpace(SizeofUcred))
	h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
	h.Level = SOL_SOCKET
	h.Type = SCM_CREDENTIALS
	h.SetLen(CmsgLen(SizeofUcred))
	*(*Ucred)(h.data(0)) = *ucred
	return b
}

// ParseUnixCredentials decodes a socket control message that contains
// credentials in a Ucred structure. To receive such a message, the

// authentication.
func UnixCredentials(ucred *Ucred) []byte {
	b := make([]byte, CmsgSpace(SizeofUcred))
	h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
	h.Level = SOL_SOCKET
	h.Type = SCM_CREDENTIALS
	h.SetLen(CmsgLen(SizeofUcred))
	*(*Ucred)(h.data(0)) = *ucred
	return b
}

// ParseUnixCredentials decodes a socket control message that contains
// credentials in a Ucred structure. To receive such a message, the

					return nil, errAccessKeyDisabled
				}
				return nil, errInvalidAccessKeyID
			}
			cred := u.Credentials
			// Expired credentials return error.
			if cred.IsTemp() && cred.IsExpired() {
				return nil, errInvalidAccessKeyID
			}
			return []byte(cred.SecretKey), nil
		} // this means claims.AccessKey == rootAccessKey
		if !globalAPIConfig.permitRootAccess() {

	Profhz  int32
}

type CtlInfo struct {
	Id   uint32
	Name [96]byte
}

const SizeofKinfoProc = 0x288

type Eproc struct {
	Paddr   uintptr
	Sess    uintptr
	Pcred   Pcred
	Ucred   Ucred
	Vm      Vmspace
	Ppid    int32
	Pgid    int32
	Jobc    int16
	Tdev    int32
	Tpgid   int32
	Tsess   uintptr
	Wmesg   [8]byte
	Xsize   int32
	Xrssize int16
	Xccount int16

	Profhz  int32
}

type CtlInfo struct {
	Id   uint32
	Name [96]byte
}

const SizeofKinfoProc = 0x288

type Eproc struct {
	Paddr   uintptr
	Sess    uintptr
	Pcred   Pcred
	Ucred   Ucred
	Vm      Vmspace
	Ppid    int32
	Pgid    int32
	Jobc    int16
	Tdev    int32
	Tpgid   int32
	Tsess   uintptr
	Wmesg   [8]byte
	Xsize   int32
	Xrssize int16
	Xccount int16

type Utimbuf struct {
	Actime  int64
	Modtime int64
}

type Utsname struct {
	Sysname  [16]byte
	Nodename [32]byte
	Release  [8]byte
	Version  [8]byte
	Machine  [16]byte
}

type Ucred struct {
	Pid int32
	Uid uint32
	Gid uint32
}

type RawSockaddrInet4 struct {
	Len    uint8
	Family uint8
	Port   uint16
	Addr   [4]byte /* in_addr */
	Zero   [8]uint8
}

	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {
	Data [8]uint32
}

type Ucred struct {
	Pid int32
	Uid uint32
	Gid uint32
}

type TCPInfo struct {
	State          uint8
	Ca_state       uint8
	Retransmits    uint8
	Probes         uint8
	Backoff        uint8

	Addr    [16]byte /* in6_addr */
	Ifindex uint32
}

type IPv6MTUInfo struct {
	Addr RawSockaddrInet6
	Mtu  uint32
}

type ICMPv6Filter struct {
	Data [8]uint32
}

type Ucred struct {
	Pid int32
	Uid uint32
	Gid uint32
}

type TCPInfo struct {
	State          uint8
	Ca_state       uint8
	Retransmits    uint8
	Probes         uint8
	Backoff        uint8