1#
2# Copyright (C) 2016 The Android Open Source Project
3#
4# Licensed under the Apache License, Version 2.0 (the "License");
5# you may not use this file except in compliance with the License.
6# You may obtain a copy of the License at
7#
8#      http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15#
16
17from vts.runners.host import const
18from vts.testcases.kernel.ltp.shell_environment.definitions.base_definitions import check_setup_cleanup
19
20
21class LoopDeviceSupport(check_setup_cleanup.CheckSetupCleanup):
22    """Class for checking loopback device support."""
23    note = "Kernel does not have loop device support"
24
25    def Check(self):
26        return not self.ExecuteShellCommand("ls /dev/loop-control")[const.EXIT_CODE][0]
27