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// The UnixCredentials system call is currently only implemented on Linux
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// http://golang.org/src/pkg/syscall/sockcmsg_linux.go
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// https://golang.org/s/go1.4-syscall
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// http://code.google.com/p/go/source/browse/unix/sockcmsg_linux.go?repo=sys
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package dbus
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import (
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	"io"
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	"os"
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	"syscall"
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)
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func (t *unixTransport) SendNullByte() error {
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	ucred := &syscall.Ucred{Pid: int32(os.Getpid()), Uid: uint32(os.Getuid()), Gid: uint32(os.Getgid())}
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	b := syscall.UnixCredentials(ucred)
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	_, oobn, err := t.UnixConn.WriteMsgUnix([]byte{0}, b, nil)
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	if err != nil {
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		return err
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	}
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	if oobn != len(b) {
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		return io.ErrShortWrite
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	}
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	return nil
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}
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