utils.py 文件源码

def map_id(path, map_uid, map_gid):
    """
    Remapping ownership of all files inside a container's rootfs.

    map_gid and map_uid: Contain integers in a list with format:
        [<start>, <target>, <count>]
    """
    if map_uid:
        uid_opts = get_mapping_opts(map_uid)
    if map_gid:
        gid_opts = get_mapping_opts(map_gid)

    for root, _ignore, files in os.walk(os.path.realpath(path)):
        for name in [root] + files:
            file_path = os.path.join(root, name)

            stat_info = os.lstat(file_path)
            old_uid = stat_info.st_uid
            old_gid = stat_info.st_gid

            new_uid = get_map_id(old_uid, uid_opts) if map_uid else -1
            new_gid = get_map_id(old_gid, gid_opts) if map_gid else -1
            os.lchown(file_path, new_uid, new_gid)