ex_commands.py 文件源码

def check_is_readonly(self, fname):
        '''
        Returns `True` if @fname is read-only on the filesystem.

        @fname
          Path to a file.
        '''
        if not fname:
            return

        try:
            mode = os.stat(fname)
            read_only = (stat.S_IMODE(mode.st_mode) & stat.S_IWUSR != stat.S_IWUSR)
        except FileNotFoundError:
            return

        return read_only