factory.py 文件源码

def _create_dummy_file(self, base, size):
        filepath = '{base}/{name}.dat'.format(base=base, name=self._gen_rand_str(5))

        with open(filepath, 'wb') as f:
            f.truncate(size)

        # Change file creation and modification to random time
        atime, mtime = self.get_rand_time_pair()
        os.utime(filepath, times=(atime, mtime), follow_symlinks=False)
        # Change st_birthtime on MacOS
        if platform == 'darwin':
            created_str = datetime.fromtimestamp(atime).strftime('%m/%d/%Y %H:%M:%S')
            # subprocess.run with list arguments and shell=False behaves very strange
            # and sets its st_birthtime to earlier than given timestamp very weirdly
            command = 'SetFile -d "{0}" {1}'.format(created_str, filepath)
            process = subprocess.Popen(command,
                                       shell=True, close_fds=True,
                                       stderr=subprocess.PIPE,
                                       stdout=subprocess.PIPE)
            self._tasks_birthtime_flags.append(process)

        self._total_size += size
        return filepath, atime, mtime, os.stat(filepath).st_ctime