ptyprocess.py 文件源码

def _setwinsize(fd, rows, cols):
    # Some very old platforms have a bug that causes the value for
    # termios.TIOCSWINSZ to be truncated. There was a hack here to work
    # around this, but it caused problems with newer platforms so has been
    # removed. For details see https://github.com/pexpect/pexpect/issues/39
    TIOCSWINSZ = getattr(termios, 'TIOCSWINSZ', -2146929561)
    # Note, assume ws_xpixel and ws_ypixel are zero.
    s = struct.pack('HHHH', rows, cols, 0, 0)
    fcntl.ioctl(fd, TIOCSWINSZ, s)