__init__.py 文件源码

def posix_shell(chan):
    import termios
    import tty

    oldtty = termios.tcgetattr(sys.stdin)
    try:
        tty.setraw(sys.stdin.fileno())
        tty.setcbreak(sys.stdin.fileno())
        chan.settimeout(0.0)

        while True:
            r, w, e = select.select([chan, sys.stdin], [], [])
            if chan in r:
                try:
                    x = unicode(chan.recv(1024))
                    if len(x) == 0:
                        break
                    sys.stdout.write(x)
                    sys.stdout.flush()
                except socket.timeout:
                    pass

            if sys.stdin in r:
                x = sys.stdin.read(1)
                if len(x) == 0:
                    break
                chan.send(x)
    finally:
        termios.tcsetattr(sys.stdin, termios.TCSADRAIN, oldtty)
        return