Esempio n. 1
0
func receiveTTY(usock *unixsocket.Usock, err error) (*os.File, error) {
	if err != nil {
		return nil, err
	}

	clientFd, err := usock.ReadFD()
	if err != nil {
		return nil, errors.New("Expected FD, none received!")
	}
	fileName := strconv.Itoa(rand.Int())
	clientFile := unixsocket.FdToFile(clientFd, fileName)

	return clientFile, nil
}
Esempio n. 2
0
// This should only be called while holding a lock on s.L.
// This unfortunately holds the mutex for a little while, and if the
// command dies super early, the entire slave pretty well deadlocks.
// TODO: review this.
func (s *SlaveNode) bootCommand(request *CommandRequest) {
	identifier := request.Name
	// TODO: If crashed, do something different...
	msg := messages.CreateSpawnCommandMessage(identifier)
	_, err := s.socket.WriteMessage(msg)
	if err != nil {
		slog.Error(err)
		return
	}
	commandFD, err := s.socket.ReadFD()
	if err != nil {
		fmt.Println(s.socket)
		slog.Error(err)
		return
	}
	fileName := strconv.Itoa(rand.Int())
	commandFile := unixsocket.FdToFile(commandFD, fileName)
	request.Retchan <- commandFile
}
Esempio n. 3
0
func (mon *SlaveMonitor) slaveDidBeginRegistration(fd int) {
	// Having just started the process, we expect an IO, which we convert to a UNIX domain socket
	fileName := strconv.Itoa(rand.Int())
	slaveFile := unixsocket.FdToFile(fd, fileName)
	slaveUsock, err := unixsocket.NewUsockFromFile(slaveFile)
	if err != nil {
		slog.Error(err)
	}
	if err = slaveUsock.Conn.SetReadBuffer(1024); err != nil {
		slog.Error(err)
	}
	if err = slaveUsock.Conn.SetWriteBuffer(1024); err != nil {
		slog.Error(err)
	}

	// We now expect the slave to use this fd they send us to send a Pid&Identifier Message
	msg, err := slaveUsock.ReadMessage()
	if err != nil {
		slog.Error(err)
	}
	pid, identifier, err := messages.ParsePidMessage(msg)

	// And the last step before executing its action, the slave sends us a pipe it will later use to
	// send us all the features it's loaded.
	featurePipeFd, err := slaveUsock.ReadFD()
	if err != nil {
		slog.Error(err)
	}

	slaveNode := mon.tree.FindSlaveByName(identifier)
	if slaveNode == nil {
		Error("slavemonitor.go:slaveDidBeginRegistration:Unknown identifier:" + identifier)
	}

	slaveNode.SlaveWasInitialized(pid, slaveUsock, featurePipeFd)
}