daemon.py 文件源码

def change_root_directory(directory):
    """ Change the root directory of this process.

        :param directory: The target directory path.
        :return: ``None``.

        Set the current working directory, then the process root directory,
        to the specified `directory`. Requires appropriate OS privileges
        for this process.

        """
    try:
        os.chdir(directory)
        os.chroot(directory)
    except Exception as exc:
        error = DaemonOSEnvironmentError(
            "Unable to change root directory ({exc})".format(exc=exc))
        raise error