master.py 文件源码

def cfmakeraw(tflags):
    """Given a list returned by :py:func:`termios.tcgetattr`, return a list
    that has been modified in the same manner as the `cfmakeraw()` C library
    function."""
    iflag, oflag, cflag, lflag, ispeed, ospeed, cc = tflags
    iflag &= ~flags('IGNBRK BRKINT PARMRK ISTRIP INLCR IGNCR ICRNL IXON')
    oflag &= ~flags('OPOST IXOFF')
    lflag &= ~flags('ECHO ECHOE ECHONL ICANON ISIG IEXTEN')
    cflag &= ~flags('CSIZE PARENB')
    cflag |= flags('CS8')

    # TODO: one or more of the above bit twiddles sets or omits a necessary
    # flag. Forcing these fields to zero, as shown below, gets us what we want
    # on Linux/OS X, but it is possibly broken on some other OS.
    iflag = 0
    oflag = 0
    lflag = 0
    return [iflag, oflag, cflag, lflag, ispeed, ospeed, cc]