udocker.py 文件源码

def _verify_layer_file(self, structure, layer_id):
        """Verify layer file in repository"""
        layer_f = structure["layers"][layer_id]["layer_f"]
        if not (os.path.exists(layer_f) and
                os.path.islink(layer_f)):
            Msg().err("Error: layer data file symbolic link not found",
                      layer_id)
            return False
        if not os.path.exists(self.cur_tagdir + "/" +
                              os.readlink(layer_f)):
            Msg().err("Error: layer data file not found")
            return False
        if not FileUtil(layer_f).verify_tar():
            Msg().err("Error: layer file not ok:", layer_f)
            return False
        match = re.search("/sha256:(\\S+)$", layer_f)
        if match:
            layer_f_chksum = ChkSUM().sha256(layer_f)
            if layer_f_chksum != match.group(1):
                Msg().err("Error: layer file chksum error:", layer_f)
                return False
        return True