__init__.py 文件源码

def get_path_uid(path):
    """
    Return path's uid.

    Does not follow symlinks: https://github.com/pypa/pip/pull/935#discussion_r5307003

    Placed this function in backwardcompat due to differences on AIX and Jython,
    that should eventually go away.

    :raises OSError: When path is a symlink or can't be read.
    """
    if hasattr(os, 'O_NOFOLLOW'):
        fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW)
        file_uid = os.fstat(fd).st_uid
        os.close(fd)
    else:  # AIX and Jython
        # WARNING: time of check vulnerabity, but best we can do w/o NOFOLLOW
        if not os.path.islink(path):
            # older versions of Jython don't have `os.fstat`
            file_uid = os.stat(path).st_uid
        else:
            # raise OSError for parity with os.O_NOFOLLOW above
            raise OSError("%s is a symlink; Will not return uid for symlinks" % path)
    return file_uid