| /* |
| * Copyright (C) 2018 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. |
| */ |
| |
| package com.android.server.devicepolicy; |
| |
| import android.annotation.Nullable; |
| import android.app.admin.DevicePolicyEventLogger; |
| import android.app.admin.DevicePolicyManager; |
| import android.app.admin.StartInstallingUpdateCallback; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.os.BatteryManager; |
| import android.os.Environment; |
| import android.os.FileUtils; |
| import android.os.ParcelFileDescriptor; |
| import android.os.PowerManager; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.stats.devicepolicy.DevicePolicyEnums; |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| abstract class UpdateInstaller { |
| private StartInstallingUpdateCallback mCallback; |
| private ParcelFileDescriptor mUpdateFileDescriptor; |
| private DevicePolicyConstants mConstants; |
| protected Context mContext; |
| |
| @Nullable protected File mCopiedUpdateFile; |
| |
| static final String TAG = "UpdateInstaller"; |
| private DevicePolicyManagerService.Injector mInjector; |
| |
| protected UpdateInstaller(Context context, ParcelFileDescriptor updateFileDescriptor, |
| StartInstallingUpdateCallback callback, DevicePolicyManagerService.Injector injector, |
| DevicePolicyConstants constants) { |
| mContext = context; |
| mCallback = callback; |
| mUpdateFileDescriptor = updateFileDescriptor; |
| mInjector = injector; |
| mConstants = constants; |
| } |
| |
| public abstract void installUpdateInThread(); |
| |
| public void startInstallUpdate() { |
| mCopiedUpdateFile = null; |
| if (!isBatteryLevelSufficient()) { |
| notifyCallbackOnError( |
| DevicePolicyManager.InstallUpdateCallback.UPDATE_ERROR_BATTERY_LOW, |
| "The battery level must be above " |
| + mConstants.BATTERY_THRESHOLD_NOT_CHARGING + " while not charging or" |
| + "above " + mConstants.BATTERY_THRESHOLD_CHARGING + " while charging"); |
| return; |
| } |
| Thread thread = new Thread(() -> { |
| mCopiedUpdateFile = copyUpdateFileToDataOtaPackageDir(); |
| if (mCopiedUpdateFile == null) { |
| notifyCallbackOnError( |
| DevicePolicyManager.InstallUpdateCallback.UPDATE_ERROR_UNKNOWN, |
| "Error while copying file."); |
| return; |
| } |
| installUpdateInThread(); |
| }); |
| thread.setPriority(Process.THREAD_PRIORITY_BACKGROUND); |
| thread.start(); |
| } |
| |
| private boolean isBatteryLevelSufficient() { |
| Intent batteryStatus = mContext.registerReceiver( |
| /* receiver= */ null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED)); |
| float batteryPercentage = calculateBatteryPercentage(batteryStatus); |
| boolean isBatteryPluggedIn = |
| batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, /* defaultValue= */ -1) > 0; |
| return isBatteryPluggedIn |
| ? batteryPercentage >= mConstants.BATTERY_THRESHOLD_CHARGING |
| : batteryPercentage >= mConstants.BATTERY_THRESHOLD_NOT_CHARGING; |
| } |
| |
| private float calculateBatteryPercentage(Intent batteryStatus) { |
| int level = batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, /* defaultValue= */ -1); |
| int scale = batteryStatus.getIntExtra(BatteryManager.EXTRA_SCALE, /* defaultValue= */ -1); |
| return 100 * level / (float) scale; |
| } |
| |
| private File copyUpdateFileToDataOtaPackageDir() { |
| try { |
| File destination = createNewFileWithPermissions(); |
| copyToFile(destination); |
| return destination; |
| } catch (IOException e) { |
| Log.w(TAG, "Failed to copy update file to OTA directory", e); |
| notifyCallbackOnError( |
| DevicePolicyManager.InstallUpdateCallback.UPDATE_ERROR_UNKNOWN, |
| Log.getStackTraceString(e)); |
| return null; |
| } |
| } |
| |
| private File createNewFileWithPermissions() throws IOException { |
| File destination = File.createTempFile( |
| "update", ".zip", new File(Environment.getDataDirectory() + "/ota_package")); |
| FileUtils.setPermissions( |
| /* path= */ destination, |
| /* mode= */ FileUtils.S_IRWXU | FileUtils.S_IRGRP | FileUtils.S_IROTH, |
| /* uid= */ -1, /* gid= */ -1); |
| return destination; |
| } |
| |
| private void copyToFile(File destination) throws IOException { |
| try (OutputStream out = new FileOutputStream(destination); |
| InputStream in = new ParcelFileDescriptor.AutoCloseInputStream( |
| mUpdateFileDescriptor)) { |
| FileUtils.copy(in, out); |
| } |
| } |
| |
| void cleanupUpdateFile() { |
| if (mCopiedUpdateFile != null && mCopiedUpdateFile.exists()) { |
| mCopiedUpdateFile.delete(); |
| } |
| } |
| |
| protected void notifyCallbackOnError(int errorCode, String errorMessage) { |
| cleanupUpdateFile(); |
| DevicePolicyEventLogger |
| .createEvent(DevicePolicyEnums.INSTALL_SYSTEM_UPDATE_ERROR) |
| .setInt(errorCode) |
| .write(); |
| try { |
| mCallback.onStartInstallingUpdateError(errorCode, errorMessage); |
| } catch (RemoteException e) { |
| Log.d(TAG, "Error while calling callback", e); |
| } |
| } |
| |
| protected void notifyCallbackOnSuccess() { |
| cleanupUpdateFile(); |
| mInjector.powerManagerReboot(PowerManager.REBOOT_REQUESTED_BY_DEVICE_OWNER); |
| } |
| } |