utils.py 文件源码

def isatty():
    if isatty.no_tty:
        return False
    f = sys.stdout
    if f.isatty():
        return True
    if not iswindows:
        return False
    # Check for a cygwin ssh pipe
    buf = ctypes.create_string_buffer(1024)
    h = msvcrt.get_osfhandle(f.fileno())
    if get_file_type(h) != 3:
        return False
    ret = get_file_info_by_handle(h, 2, buf, ctypes.sizeof(buf))
    if not ret:
        raise ctypes.WinError()
    data = buf.raw
    name = data[4:].decode('utf-16').rstrip(u'\0')
    parts = name.split('-')
    return parts[0] == r'\cygwin' and parts[2].startswith('pty') and parts[4] == 'master'