kubernetes/vendor/github.com/opencontainers/runc/libcontainer/utils/cmsg.go

const MaxNameLen …

var oobSpace …

// RecvFile waits for a file descriptor to be sent over the given AF_UNIX
// socket. The file name of the remote file descriptor will be recreated
// locally (it is sent as non-auxiliary data in the same payload).
func RecvFile(socket *os.File) (_ *os.File, Err error) { … }

// SendFile sends a file over the given AF_UNIX socket. file.Name() is also
// included so that if the other end uses RecvFile, the file will have the same
// name information.
func SendFile(socket *os.File, file *os.File) error { … }

// SendRawFd sends a specific file descriptor over the given AF_UNIX socket.
func SendRawFd(socket *os.File, msg string, fd uintptr) error { … }