server.py 文件源码

def _create(self, rows=24, cols=80):
        pid, fd = pty.fork()
        if pid == 0:
            if os.getuid() == 0:
                cmd = ['/bin/login']
            else:
                # The prompt has to end with a newline character.
                sys.stdout.write(socket.gethostname() + ' login: \n')
                login = sys.stdin.readline().strip()

                cmd = [
                    'ssh',
                    '-oPreferredAuthentications=keyboard-interactive,password',
                    '-oNoHostAuthenticationForLocalhost=yes',
                    '-oLogLevel=FATAL',
                    '-F/dev/null',
                    '-l', login, 'localhost',
                ]

            env = {
                'COLUMNS': str(cols),
                'LINES': str(rows),
                'PATH': os.environ['PATH'],
                'TERM': 'linux',
            }
            os.execvpe(cmd[0], cmd, env)
        else:
            fcntl.fcntl(fd, fcntl.F_SETFL, os.O_NONBLOCK)
            fcntl.ioctl(fd, termios.TIOCSWINSZ,
                        struct.pack('HHHH', rows, cols, 0, 0))
            TermSocketHandler.clients[fd] = {
                'client': self,
                'pid': pid,
                'terminal': Terminal(rows, cols)
            }

            return fd