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/*
* Copyright (C) 2017 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.packageinstaller;
import android.annotation.NonNull;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.SystemClock;
import android.util.Log;
import java.io.File;
import java.io.IOException;
/**
* Manages files of the package installer and resets state during boot.
*/
public class TemporaryFileManager extends BroadcastReceiver {
private static final String LOG_TAG = TemporaryFileManager.class.getSimpleName();
/**
* Create a new file to hold a staged file.
*
* @param context The context of the caller
*
* @return A new file
*/
@NonNull
public static File getStagedFile(@NonNull Context context) throws IOException {
return File.createTempFile("package", ".apk", context.getNoBackupFilesDir());
}
/**
* Get the file used to store the results of installs.
*
* @param context The context of the caller
*
* @return the file used to store the results of installs
*/
@NonNull
public static File getInstallStateFile(@NonNull Context context) {
return new File(context.getNoBackupFilesDir(), "install_results.xml");
}
/**
* Get the file used to store the results of uninstalls.
*
* @param context The context of the caller
*
* @return the file used to store the results of uninstalls
*/
@NonNull
public static File getUninstallStateFile(@NonNull Context context) {
return new File(context.getNoBackupFilesDir(), "uninstall_results.xml");
}
@Override
public void onReceive(Context context, Intent intent) {
long systemBootTime = System.currentTimeMillis() - SystemClock.elapsedRealtime();
File[] filesOnBoot = context.getNoBackupFilesDir().listFiles();
if (filesOnBoot == null) {
return;
}
for (int i = 0; i < filesOnBoot.length; i++) {
File fileOnBoot = filesOnBoot[i];
if (systemBootTime > fileOnBoot.lastModified()) {
boolean wasDeleted = fileOnBoot.delete();
if (!wasDeleted) {
Log.w(LOG_TAG, "Could not delete " + fileOnBoot.getName() + " onBoot");
}
} else {
Log.w(LOG_TAG, fileOnBoot.getName() + " was created before onBoot broadcast was "
+ "received");
}
}
}
}
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