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moby--moby/vendor/github.com/godbus/dbus/v5/transport_generic.go
Akihiro Suda 9a82a9a8ea vendor containerd, BuildKit, protobuf, grpc, and golang.org/x
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
2020-03-03 10:25:20 +09:00

50 lines
907 B
Go

package dbus
import (
"encoding/binary"
"errors"
"io"
"unsafe"
)
var nativeEndian binary.ByteOrder
func detectEndianness() binary.ByteOrder {
var x uint32 = 0x01020304
if *(*byte)(unsafe.Pointer(&x)) == 0x01 {
return binary.BigEndian
}
return binary.LittleEndian
}
func init() {
nativeEndian = detectEndianness()
}
type genericTransport struct {
io.ReadWriteCloser
}
func (t genericTransport) SendNullByte() error {
_, err := t.Write([]byte{0})
return err
}
func (t genericTransport) SupportsUnixFDs() bool {
return false
}
func (t genericTransport) EnableUnixFDs() {}
func (t genericTransport) ReadMessage() (*Message, error) {
return DecodeMessage(t)
}
func (t genericTransport) SendMessage(msg *Message) error {
for _, v := range msg.Body {
if _, ok := v.(UnixFD); ok {
return errors.New("dbus: unix fd passing not enabled")
}
}
return msg.EncodeTo(t, nativeEndian)
}