knotty.py 文件源码

def getTerminalColumns(self):
        def ioctl_GWINSZ(fd):
            try:
                cr = struct.unpack('hh', fcntl.ioctl(fd, self.termios.TIOCGWINSZ, '1234'))
            except:
                return None
            return cr
        cr = ioctl_GWINSZ(sys.stdout.fileno())
        if not cr:
            try:
                fd = os.open(os.ctermid(), os.O_RDONLY)
                cr = ioctl_GWINSZ(fd)
                os.close(fd)
            except:
                pass
        if not cr:
            try:
                cr = (env['LINES'], env['COLUMNS'])
            except:
                cr = (25, 80)
        return cr