Implement powerwash on Android.
Powerwash, the name for the equivalent of a factory reset or /data wipe,
can be triggered in Android by writing the desired command to the
recovery command file and rebooting into recovery.
This patch moves the powerwash scheduling/canceling logic to the
HardwareInterface and implements it on Android.
Bug: 28700985
TEST=Called update_engine_client passing POWERWASH=1, BCB is stored up
to offset 832.
Change-Id: If737fd4b9b3e2ed9bce709b3b59f22e9f0a3dc9a
diff --git a/utils_android.h b/utils_android.h
new file mode 100644
index 0000000..18dd8ab
--- /dev/null
+++ b/utils_android.h
@@ -0,0 +1,37 @@
+//
+// Copyright (C) 2016 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#ifndef UPDATE_ENGINE_UTILS_ANDROID_H_
+#define UPDATE_ENGINE_UTILS_ANDROID_H_
+
+#include <string>
+
+#include <base/files/file_util.h>
+
+namespace chromeos_update_engine {
+
+namespace utils {
+
+// Find the block device that should be mounted in the |mount_point| path and
+// store it in |device|. Returns whether a device was found on the fstab.
+bool DeviceForMountPoint(const std::string& mount_point,
+ base::FilePath* device);
+
+} // namespace utils
+
+} // namespace chromeos_update_engine
+
+#endif // UPDATE_ENGINE_UTILS_ANDROID_H_