示例#1
0
// Manhole connects os.Stdin, os.Stdout, and os.Stderr to an interactive shell
// session on the Machine m. Manhole blocks until the shell session has ended.
// If os.Stdin does not refer to a TTY, Manhole returns immediately with a nil
// error.
func Manhole(m Machine) error {
	fd := int(os.Stdin.Fd())
	if !terminal.IsTerminal(fd) {
		return nil
	}

	tstate, _ := terminal.MakeRaw(fd)
	defer terminal.Restore(fd, tstate)

	client, err := m.SSHClient()
	if err != nil {
		return fmt.Errorf("SSH client failed: %v", err)
	}

	defer client.Close()

	session, err := client.NewSession()
	if err != nil {
		return fmt.Errorf("SSH session failed: %v", err)
	}

	defer session.Close()

	session.Stdin = os.Stdin
	session.Stdout = os.Stdout
	session.Stderr = os.Stderr

	modes := ssh.TerminalModes{
		ssh.TTY_OP_ISPEED: 115200,
		ssh.TTY_OP_OSPEED: 115200,
	}

	cols, lines, err := terminal.GetSize(int(os.Stdin.Fd()))
	if err != nil {
		return err
	}

	if err = session.RequestPty(os.Getenv("TERM"), lines, cols, modes); err != nil {
		return fmt.Errorf("failed to request pseudo terminal: %s", err)
	}

	if err := session.Shell(); err != nil {
		return fmt.Errorf("failed to start shell: %s", err)
	}

	if err := session.Wait(); err != nil {
		return fmt.Errorf("failed to wait for session: %s", err)
	}

	return nil
}
示例#2
0
文件: h2i.go 项目: pwaller/mantle
func (app *h2i) Main() error {
	cfg := &tls.Config{
		ServerName:         app.host,
		NextProtos:         strings.Split(*flagNextProto, ","),
		InsecureSkipVerify: *flagInsecure,
	}

	hostAndPort := withPort(app.host)
	log.Printf("Connecting to %s ...", hostAndPort)
	tc, err := tls.Dial("tcp", hostAndPort, cfg)
	if err != nil {
		return fmt.Errorf("Error dialing %s: %v", withPort(app.host), err)
	}
	log.Printf("Connected to %v", tc.RemoteAddr())
	defer tc.Close()

	if err := tc.Handshake(); err != nil {
		return fmt.Errorf("TLS handshake: %v", err)
	}
	if !*flagInsecure {
		if err := tc.VerifyHostname(app.host); err != nil {
			return fmt.Errorf("VerifyHostname: %v", err)
		}
	}
	state := tc.ConnectionState()
	log.Printf("Negotiated protocol %q", state.NegotiatedProtocol)
	if !state.NegotiatedProtocolIsMutual || state.NegotiatedProtocol == "" {
		return fmt.Errorf("Could not negotiate protocol mutually")
	}

	if _, err := io.WriteString(tc, http2.ClientPreface); err != nil {
		return err
	}

	app.framer = http2.NewFramer(tc, tc)

	oldState, err := terminal.MakeRaw(0)
	if err != nil {
		return err
	}
	defer terminal.Restore(0, oldState)

	var screen = struct {
		io.Reader
		io.Writer
	}{os.Stdin, os.Stdout}

	app.term = terminal.NewTerminal(screen, "h2i> ")
	lastWord := regexp.MustCompile(`.+\W(\w+)$`)
	app.term.AutoCompleteCallback = func(line string, pos int, key rune) (newLine string, newPos int, ok bool) {
		if key != '\t' {
			return
		}
		if pos != len(line) {
			// TODO: we're being lazy for now, only supporting tab completion at the end.
			return
		}
		// Auto-complete for the command itself.
		if !strings.Contains(line, " ") {
			var name string
			name, _, ok = lookupCommand(line)
			if !ok {
				return
			}
			return name, len(name), true
		}
		_, c, ok := lookupCommand(line[:strings.IndexByte(line, ' ')])
		if !ok || c.complete == nil {
			return
		}
		if strings.HasSuffix(line, " ") {
			app.logf("%s", strings.Join(c.complete(), " "))
			return line, pos, true
		}
		m := lastWord.FindStringSubmatch(line)
		if m == nil {
			return line, len(line), true
		}
		soFar := m[1]
		var match []string
		for _, cand := range c.complete() {
			if len(soFar) > len(cand) || !strings.EqualFold(cand[:len(soFar)], soFar) {
				continue
			}
			match = append(match, cand)
		}
		if len(match) == 0 {
			return
		}
		if len(match) > 1 {
			// TODO: auto-complete any common prefix
			app.logf("%s", strings.Join(match, " "))
			return line, pos, true
		}
		newLine = line[:len(line)-len(soFar)] + match[0]
		return newLine, len(newLine), true

	}

	errc := make(chan error, 2)
	go func() { errc <- app.readFrames() }()
	go func() { errc <- app.readConsole() }()
	return <-errc
}