Example #1
0
func (s *execWs) Do(id string) shared.OperationResult {
	<-s.allConnected

	var err error
	var ttys []*os.File
	var ptys []*os.File

	if s.interactive {
		ttys = make([]*os.File, 1)
		ptys = make([]*os.File, 1)
		ptys[0], ttys[0], err = shared.OpenPty(s.rootUid, s.rootGid)
		s.options.StdinFd = ttys[0].Fd()
		s.options.StdoutFd = ttys[0].Fd()
		s.options.StderrFd = ttys[0].Fd()
	} else {
		ttys = make([]*os.File, 3)
		ptys = make([]*os.File, 3)
		for i := 0; i < len(ttys); i++ {
			ptys[i], ttys[i], err = shared.Pipe()
			if err != nil {
				return shared.OperationError(err)
			}
		}
		s.options.StdinFd = ptys[0].Fd()
		s.options.StdoutFd = ttys[1].Fd()
		s.options.StderrFd = ttys[2].Fd()
	}

	controlExit := make(chan bool)
	var wgEOF sync.WaitGroup

	if s.interactive {
		wgEOF.Add(1)
		go func() {
			select {
			case <-s.controlConnected:
				break

			case <-controlExit:
				return
			}

			for {
				mt, r, err := s.conns[-1].NextReader()
				if mt == websocket.CloseMessage {
					break
				}

				if err != nil {
					shared.Debugf("Got error getting next reader %s", err)
					break
				}

				buf, err := ioutil.ReadAll(r)
				if err != nil {
					shared.Debugf("Failed to read message %s", err)
					break
				}

				command := shared.ContainerExecControl{}

				if err := json.Unmarshal(buf, &command); err != nil {
					shared.Debugf("Failed to unmarshal control socket command: %s", err)
					continue
				}

				if command.Command == "window-resize" {
					winchWidth, err := strconv.Atoi(command.Args["width"])
					if err != nil {
						shared.Debugf("Unable to extract window width: %s", err)
						continue
					}

					winchHeight, err := strconv.Atoi(command.Args["height"])
					if err != nil {
						shared.Debugf("Unable to extract window height: %s", err)
						continue
					}

					err = shared.SetSize(int(ptys[0].Fd()), winchWidth, winchHeight)
					if err != nil {
						shared.Debugf("Failed to set window size to: %dx%d", winchWidth, winchHeight)
						continue
					}
				}

				if err != nil {
					shared.Debugf("Got error writing to writer %s", err)
					break
				}
			}
		}()
		go func() {
			<-shared.WebsocketMirror(s.conns[0], ptys[0], ptys[0])
			wgEOF.Done()
		}()
	} else {
		wgEOF.Add(len(ttys) - 1)
		for i := 0; i < len(ttys); i++ {
			go func(i int) {
				if i == 0 {
					<-shared.WebsocketRecvStream(ttys[i], s.conns[i])
					ttys[i].Close()
				} else {
					<-shared.WebsocketSendStream(s.conns[i], ptys[i])
					ptys[i].Close()
					wgEOF.Done()
				}
			}(i)
		}
	}

	result := runCommand(
		s.container,
		s.command,
		s.options,
	)

	for _, tty := range ttys {
		tty.Close()
	}

	if s.conns[-1] == nil {
		if s.interactive {
			controlExit <- true
		}
	} else {
		s.conns[-1].Close()
	}

	wgEOF.Wait()

	for _, pty := range ptys {
		pty.Close()
	}

	return result
}
Example #2
0
func (s *execWs) Do(op *operation) error {
	<-s.allConnected

	var err error
	var ttys []*os.File
	var ptys []*os.File

	var stdin *os.File
	var stdout *os.File
	var stderr *os.File

	if s.interactive {
		ttys = make([]*os.File, 1)
		ptys = make([]*os.File, 1)
		ptys[0], ttys[0], err = shared.OpenPty(s.rootUid, s.rootGid)

		stdin = ttys[0]
		stdout = ttys[0]
		stderr = ttys[0]

		if s.width > 0 && s.height > 0 {
			shared.SetSize(int(ptys[0].Fd()), s.width, s.height)
		}
	} else {
		ttys = make([]*os.File, 3)
		ptys = make([]*os.File, 3)
		for i := 0; i < len(ttys); i++ {
			ptys[i], ttys[i], err = shared.Pipe()
			if err != nil {
				return err
			}
		}

		stdin = ptys[0]
		stdout = ttys[1]
		stderr = ttys[2]
	}

	controlExit := make(chan bool)
	receivePid := make(chan int)
	var wgEOF sync.WaitGroup

	if s.interactive {
		wgEOF.Add(1)
		go func() {
			receivedPid := <-receivePid
			select {
			case <-s.controlConnected:
				break

			case <-controlExit:
				return
			}

			for {
				mt, r, err := s.conns[-1].NextReader()
				if mt == websocket.CloseMessage {
					break
				}

				if err != nil {
					shared.LogDebugf("Got error getting next reader %s", err)
					break
				}

				buf, err := ioutil.ReadAll(r)
				if err != nil {
					shared.LogDebugf("Failed to read message %s", err)
					break
				}

				command := shared.ContainerExecControl{}

				if err := json.Unmarshal(buf, &command); err != nil {
					shared.LogDebugf("Failed to unmarshal control socket command: %s", err)
					continue
				}

				if command.Command == "window-resize" {
					winchWidth, err := strconv.Atoi(command.Args["width"])
					if err != nil {
						shared.LogDebugf("Unable to extract window width: %s", err)
						continue
					}

					winchHeight, err := strconv.Atoi(command.Args["height"])
					if err != nil {
						shared.LogDebugf("Unable to extract window height: %s", err)
						continue
					}

					err = shared.SetSize(int(ptys[0].Fd()), winchWidth, winchHeight)
					if err != nil {
						shared.LogDebugf("Failed to set window size to: %dx%d", winchWidth, winchHeight)
						continue
					}
				} else if command.Command == "signal" {
					if err := syscall.Kill(receivedPid, command.Signal); err != nil {
						shared.LogDebugf("Failed forwarding signal '%s' to PID %d.", command.Signal, receivedPid)
						continue
					}
					shared.LogDebugf("Forwarded signal '%s' to PID %d.", command.Signal, receivedPid)
				}
			}
		}()
		go func() {
			readDone, writeDone := shared.WebsocketMirror(s.conns[0], ptys[0], ptys[0])
			<-readDone
			<-writeDone
			s.conns[0].Close()
			wgEOF.Done()
		}()
	} else {
		wgEOF.Add(len(ttys) - 1)
		for i := 0; i < len(ttys); i++ {
			go func(i int) {
				if i == 0 {
					<-shared.WebsocketRecvStream(ttys[i], s.conns[i])
					ttys[i].Close()
				} else {
					<-shared.WebsocketSendStream(s.conns[i], ptys[i], -1)
					ptys[i].Close()
					wgEOF.Done()
				}
			}(i)
		}
	}

	finisher := func(cmdResult int, cmdErr error) error {
		for _, tty := range ttys {
			tty.Close()
		}

		if s.conns[-1] == nil {
			if s.interactive {
				controlExit <- true
			}
		} else {
			s.conns[-1].Close()
		}

		wgEOF.Wait()

		for _, pty := range ptys {
			pty.Close()
		}

		metadata := shared.Jmap{"return": cmdResult}
		err = op.UpdateMetadata(metadata)
		if err != nil {
			return err
		}

		return cmdErr
	}

	r, w, err := shared.Pipe()
	defer r.Close()
	if err != nil {
		shared.LogErrorf("s", err)
		return err
	}

	cmd, err := s.container.ExecNoWait(s.command, s.env, stdin, stdout, stderr, w)
	if err != nil {
		w.Close()
		return err
	}

	err = cmd.Start()
	if err != nil {
		w.Close()
		return err
	}
	w.Close()

	attachedPid := -1
	if err := json.NewDecoder(r).Decode(&attachedPid); err != nil {
		shared.LogErrorf("Failed to retrieve PID of executing child process: %s", err)
		return finisher(-1, err)
	}

	if s.interactive {
		receivePid <- attachedPid
	}

	err = cmd.Wait()
	if err != nil {
		exitErr, ok := err.(*exec.ExitError)
		if ok {
			status, ok := exitErr.Sys().(syscall.WaitStatus)
			if ok {
				return finisher(status.ExitStatus(), nil)
			}
		}
	}

	return finisher(0, nil)
}
Example #3
0
func (s *execWs) Do(op *operation) error {
	<-s.allConnected

	var err error
	var ttys []*os.File
	var ptys []*os.File

	var stdin *os.File
	var stdout *os.File
	var stderr *os.File

	if s.interactive {
		ttys = make([]*os.File, 1)
		ptys = make([]*os.File, 1)
		ptys[0], ttys[0], err = shared.OpenPty(s.rootUid, s.rootGid)

		stdin = ttys[0]
		stdout = ttys[0]
		stderr = ttys[0]

		if s.width > 0 && s.height > 0 {
			shared.SetSize(int(ptys[0].Fd()), s.width, s.height)
		}
	} else {
		ttys = make([]*os.File, 3)
		ptys = make([]*os.File, 3)
		for i := 0; i < len(ttys); i++ {
			ptys[i], ttys[i], err = shared.Pipe()
			if err != nil {
				return err
			}
		}

		stdin = ptys[0]
		stdout = ttys[1]
		stderr = ttys[2]
	}

	controlExit := make(chan bool)
	var wgEOF sync.WaitGroup

	if s.interactive {
		wgEOF.Add(1)
		go func() {
			select {
			case <-s.controlConnected:
				break

			case <-controlExit:
				return
			}

			for {
				mt, r, err := s.conns[-1].NextReader()
				if mt == websocket.CloseMessage {
					break
				}

				if err != nil {
					shared.Debugf("Got error getting next reader %s", err)
					break
				}

				buf, err := ioutil.ReadAll(r)
				if err != nil {
					shared.Debugf("Failed to read message %s", err)
					break
				}

				command := shared.ContainerExecControl{}

				if err := json.Unmarshal(buf, &command); err != nil {
					shared.Debugf("Failed to unmarshal control socket command: %s", err)
					continue
				}

				if command.Command == "window-resize" {
					winchWidth, err := strconv.Atoi(command.Args["width"])
					if err != nil {
						shared.Debugf("Unable to extract window width: %s", err)
						continue
					}

					winchHeight, err := strconv.Atoi(command.Args["height"])
					if err != nil {
						shared.Debugf("Unable to extract window height: %s", err)
						continue
					}

					err = shared.SetSize(int(ptys[0].Fd()), winchWidth, winchHeight)
					if err != nil {
						shared.Debugf("Failed to set window size to: %dx%d", winchWidth, winchHeight)
						continue
					}
				}
			}
		}()
		go func() {
			readDone, writeDone := shared.WebsocketMirror(s.conns[0], ptys[0], ptys[0])
			<-readDone
			<-writeDone
			s.conns[0].Close()
			wgEOF.Done()
		}()
	} else {
		wgEOF.Add(len(ttys) - 1)
		for i := 0; i < len(ttys); i++ {
			go func(i int) {
				if i == 0 {
					<-shared.WebsocketRecvStream(ttys[i], s.conns[i])
					ttys[i].Close()
				} else {
					<-shared.WebsocketSendStream(s.conns[i], ptys[i])
					ptys[i].Close()
					wgEOF.Done()
				}
			}(i)
		}
	}

	cmdResult, cmdErr := s.container.Exec(s.command, s.env, stdin, stdout, stderr)

	for _, tty := range ttys {
		tty.Close()
	}

	if s.conns[-1] == nil {
		if s.interactive {
			controlExit <- true
		}
	} else {
		s.conns[-1].Close()
	}

	wgEOF.Wait()

	for _, pty := range ptys {
		pty.Close()
	}

	metadata := shared.Jmap{"return": cmdResult}
	err = op.UpdateMetadata(metadata)
	if err != nil {
		return err
	}

	return cmdErr
}
Example #4
0
func (s *execWs) Do(op *operation) error {
	<-s.allConnected

	var err error
	var ttys []*os.File
	var ptys []*os.File

	var stdin *os.File
	var stdout *os.File
	var stderr *os.File

	if s.interactive {
		ttys = make([]*os.File, 1)
		ptys = make([]*os.File, 1)
		ptys[0], ttys[0], err = shared.OpenPty(s.rootUid, s.rootGid)

		stdin = ttys[0]
		stdout = ttys[0]
		stderr = ttys[0]

		if s.width > 0 && s.height > 0 {
			shared.SetSize(int(ptys[0].Fd()), s.width, s.height)
		}
	} else {
		ttys = make([]*os.File, 3)
		ptys = make([]*os.File, 3)
		for i := 0; i < len(ttys); i++ {
			ptys[i], ttys[i], err = shared.Pipe()
			if err != nil {
				return err
			}
		}

		stdin = ptys[0]
		stdout = ttys[1]
		stderr = ttys[2]
	}

	controlExit := make(chan bool)
	receivePid := make(chan int)
	var wgEOF sync.WaitGroup

	if s.interactive {
		wgEOF.Add(1)
		go func() {
			receivedPid := <-receivePid
			select {
			case <-s.controlConnected:
				break

			case <-controlExit:
				return
			}

			for {
				mt, r, err := s.conns[-1].NextReader()
				if mt == websocket.CloseMessage {
					break
				}

				if err != nil {
					shared.LogDebugf("Got error getting next reader %s", err)
					break
				}

				buf, err := ioutil.ReadAll(r)
				if err != nil {
					shared.LogDebugf("Failed to read message %s", err)
					break
				}

				command := shared.ContainerExecControl{}

				if err := json.Unmarshal(buf, &command); err != nil {
					shared.LogDebugf("Failed to unmarshal control socket command: %s", err)
					continue
				}

				if command.Command == "window-resize" {
					winchWidth, err := strconv.Atoi(command.Args["width"])
					if err != nil {
						shared.LogDebugf("Unable to extract window width: %s", err)
						continue
					}

					winchHeight, err := strconv.Atoi(command.Args["height"])
					if err != nil {
						shared.LogDebugf("Unable to extract window height: %s", err)
						continue
					}

					err = shared.SetSize(int(ptys[0].Fd()), winchWidth, winchHeight)
					if err != nil {
						shared.LogDebugf("Failed to set window size to: %dx%d", winchWidth, winchHeight)
						continue
					}
				} else if command.Command == "signal" {
					if err := syscall.Kill(receivedPid, command.Signal); err != nil {
						shared.LogDebugf("Failed forwarding signal '%s' to PID %d.", command.Signal, receivedPid)
						continue
					}
					shared.LogDebugf("Forwarded signal '%s' to PID %d.", command.Signal, receivedPid)
				}
			}
		}()
		go func() {
			readDone, writeDone := shared.WebsocketMirror(s.conns[0], ptys[0], ptys[0])
			<-readDone
			<-writeDone
			s.conns[0].Close()
			wgEOF.Done()
		}()
	} else {
		wgEOF.Add(len(ttys) - 1)
		for i := 0; i < len(ttys); i++ {
			go func(i int) {
				if i == 0 {
					<-shared.WebsocketRecvStream(ttys[i], s.conns[i])
					ttys[i].Close()
				} else {
					<-shared.WebsocketSendStream(s.conns[i], ptys[i], -1)
					ptys[i].Close()
					wgEOF.Done()
				}
			}(i)
		}
	}

	finisher := func(cmdResult int, cmdErr error) error {
		for _, tty := range ttys {
			tty.Close()
		}

		if s.conns[-1] == nil {
			if s.interactive {
				controlExit <- true
			}
		} else {
			s.conns[-1].Close()
		}

		wgEOF.Wait()

		for _, pty := range ptys {
			pty.Close()
		}

		metadata := shared.Jmap{"return": cmdResult}
		err = op.UpdateMetadata(metadata)
		if err != nil {
			return err
		}

		return cmdErr
	}

	pid, attachedPid, err := s.container.Exec(s.command, s.env, stdin, stdout, stderr, false)
	if err != nil {
		return err
	}

	if s.interactive {
		receivePid <- attachedPid
	}

	proc, err := os.FindProcess(pid)
	if err != nil {
		return finisher(-1, fmt.Errorf("Failed finding process: %q", err))
	}

	procState, err := proc.Wait()
	if err != nil {
		return finisher(-1, fmt.Errorf("Failed waiting on process %d: %q", pid, err))
	}

	if procState.Success() {
		return finisher(0, nil)
	}

	status, ok := procState.Sys().(syscall.WaitStatus)
	if ok {
		if status.Exited() {
			return finisher(status.ExitStatus(), nil)
		}
		// Backwards compatible behavior. Report success when we exited
		// due to a signal. Otherwise this may break Jenkins, e.g. when
		// lxc exec foo reboot receives SIGTERM and status.Exitstats()
		// would report -1.
		if status.Signaled() {
			return finisher(0, nil)
		}
	}

	return finisher(-1, nil)
}