storage.py 文件源码

def get_link_target(link):
    """Get an absolute path to the target of link.

    :param str link: Path to a symbolic link

    :returns: Absolute path to the target of link
    :rtype: str

    :raises .CertStorageError: If link does not exists.

    """
    try:
        target = os.readlink(link)
    except OSError:
        raise errors.CertStorageError(
            "Expected {0} to be a symlink".format(link))

    if not os.path.isabs(target):
        target = os.path.join(os.path.dirname(link), target)
    return os.path.abspath(target)