389 lines
16 KiB
Java
389 lines
16 KiB
Java
package com.android.defcontainer;
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import com.android.internal.app.IMediaContainerService;
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import com.android.internal.content.PackageHelper;
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import android.content.Intent;
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import android.content.pm.IPackageManager;
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import android.content.pm.PackageInfo;
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import android.content.pm.PackageManager;
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import android.content.pm.PackageParser;
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import android.content.pm.PackageParser.Package;
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import android.net.Uri;
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import android.os.Environment;
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import android.os.IBinder;
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import android.os.ParcelFileDescriptor;
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import android.os.Process;
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import android.os.RemoteException;
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import android.os.ServiceManager;
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import android.os.StatFs;
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import android.app.IntentService;
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import android.util.DisplayMetrics;
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import android.util.Log;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import android.os.FileUtils;
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import android.provider.Settings;
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/*
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* This service copies a downloaded apk to a file passed in as
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* a ParcelFileDescriptor or to a newly created container specified
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* by parameters. The DownloadManager gives access to this process
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* based on its uid. This process also needs the ACCESS_DOWNLOAD_MANAGER
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* permission to access apks downloaded via the download manager.
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*/
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public class DefaultContainerService extends IntentService {
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private static final String TAG = "DefContainer";
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private static final boolean localLOGV = false;
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private IMediaContainerService.Stub mBinder = new IMediaContainerService.Stub() {
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/*
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* Creates a new container and copies resource there.
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* @param paackageURI the uri of resource to be copied. Can be either
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* a content uri or a file uri
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* @param cid the id of the secure container that should
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* be used for creating a secure container into which the resource
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* will be copied.
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* @param key Refers to key used for encrypting the secure container
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* @param resFileName Name of the target resource file(relative to newly
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* created secure container)
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* @return Returns the new cache path where the resource has been copied into
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*
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*/
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public String copyResourceToContainer(final Uri packageURI,
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final String cid,
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final String key, final String resFileName) {
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if (packageURI == null || cid == null) {
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return null;
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}
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return copyResourceInner(packageURI, cid, key, resFileName);
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}
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/*
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* Copy specified resource to output stream
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* @param packageURI the uri of resource to be copied. Should be a
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* file uri
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* @param outStream Remote file descriptor to be used for copying
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* @return Returns true if copy succeded or false otherwise.
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*/
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public boolean copyResource(final Uri packageURI,
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ParcelFileDescriptor outStream) {
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if (packageURI == null || outStream == null) {
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return false;
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}
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ParcelFileDescriptor.AutoCloseOutputStream
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autoOut = new ParcelFileDescriptor.AutoCloseOutputStream(outStream);
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return copyFile(packageURI, autoOut);
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}
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/*
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* Determine the recommended install location for package
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* specified by file uri location.
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* @param fileUri the uri of resource to be copied. Should be a
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* file uri
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* @return Returns
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* PackageHelper.RECOMMEND_INSTALL_INTERNAL to install on internal storage
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* PackageHelper.RECOMMEND_INSTALL_EXTERNAL to install on external media
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* PackageHelper.RECOMMEND_FAILED_INSUFFICIENT_STORAGE for storage errors
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* PackageHelper.RECOMMEND_FAILED_INVALID_APK for parse errors.
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*/
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public int getRecommendedInstallLocation(final Uri fileUri) {
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if (!fileUri.getScheme().equals("file")) {
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Log.w(TAG, "Falling back to installing on internal storage only");
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return PackageHelper.RECOMMEND_INSTALL_INTERNAL;
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}
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final String archiveFilePath = fileUri.getPath();
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PackageParser packageParser = new PackageParser(archiveFilePath);
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File sourceFile = new File(archiveFilePath);
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DisplayMetrics metrics = new DisplayMetrics();
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metrics.setToDefaults();
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PackageParser.Package pkg = packageParser.parsePackage(sourceFile, archiveFilePath, metrics, 0);
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if (pkg == null) {
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Log.w(TAG, "Failed to parse package");
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return PackageHelper.RECOMMEND_FAILED_INVALID_APK;
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}
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int loc = recommendAppInstallLocation(pkg);
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if (loc == PackageManager.INSTALL_EXTERNAL) {
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return PackageHelper.RECOMMEND_INSTALL_EXTERNAL;
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} else if (loc == ERR_LOC) {
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Log.i(TAG, "Failed to install insufficient storage");
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return PackageHelper.RECOMMEND_FAILED_INSUFFICIENT_STORAGE;
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} else {
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// Implies install on internal storage.
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return 0;
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}
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}
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};
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public DefaultContainerService() {
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super("DefaultContainerService");
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setIntentRedelivery(true);
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}
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@Override
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protected void onHandleIntent(Intent intent) {
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if (PackageManager.ACTION_CLEAN_EXTERNAL_STORAGE.equals(intent.getAction())) {
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IPackageManager pm = IPackageManager.Stub.asInterface(
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ServiceManager.getService("package"));
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String pkg = null;
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try {
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while ((pkg=pm.nextPackageToClean(pkg)) != null) {
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eraseFiles(Environment.getExternalStorageAppDataDirectory(pkg));
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eraseFiles(Environment.getExternalStorageAppMediaDirectory(pkg));
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}
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} catch (RemoteException e) {
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}
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}
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}
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void eraseFiles(File path) {
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if (path.isDirectory()) {
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String[] files = path.list();
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if (files != null) {
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for (String file : files) {
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eraseFiles(new File(path, file));
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}
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}
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}
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path.delete();
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}
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public IBinder onBind(Intent intent) {
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return mBinder;
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}
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private String copyResourceInner(Uri packageURI, String newCid, String key, String resFileName) {
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// Create new container at newCachePath
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String codePath = packageURI.getPath();
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File codeFile = new File(codePath);
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String newCachePath = null;
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final int CREATE_FAILED = 1;
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final int COPY_FAILED = 2;
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final int FINALIZE_FAILED = 3;
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final int PASS = 4;
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int errCode = CREATE_FAILED;
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// Create new container
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if ((newCachePath = PackageHelper.createSdDir(codeFile,
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newCid, key, Process.myUid())) != null) {
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if (localLOGV) Log.i(TAG, "Created container for " + newCid
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+ " at path : " + newCachePath);
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File resFile = new File(newCachePath, resFileName);
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errCode = COPY_FAILED;
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// Copy file from codePath
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if (FileUtils.copyFile(new File(codePath), resFile)) {
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if (localLOGV) Log.i(TAG, "Copied " + codePath + " to " + resFile);
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errCode = FINALIZE_FAILED;
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if (PackageHelper.finalizeSdDir(newCid)) {
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if (localLOGV) Log.i(TAG, "Finalized container " + newCid);
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errCode = PASS;
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}
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}
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}
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// Print error based on errCode
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String errMsg = "";
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switch (errCode) {
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case CREATE_FAILED:
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errMsg = "CREATE_FAILED";
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break;
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case COPY_FAILED:
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errMsg = "COPY_FAILED";
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if (localLOGV) Log.i(TAG, "Destroying " + newCid +
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" at path " + newCachePath + " after " + errMsg);
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PackageHelper.destroySdDir(newCid);
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break;
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case FINALIZE_FAILED:
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errMsg = "FINALIZE_FAILED";
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if (localLOGV) Log.i(TAG, "Destroying " + newCid +
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" at path " + newCachePath + " after " + errMsg);
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PackageHelper.destroySdDir(newCid);
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break;
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default:
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errMsg = "PASS";
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if (PackageHelper.isContainerMounted(newCid)) {
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if (localLOGV) Log.i(TAG, "Unmounting " + newCid +
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" at path " + newCachePath + " after " + errMsg);
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PackageHelper.unMountSdDir(newCid);
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} else {
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if (localLOGV) Log.i(TAG, "Container " + newCid + " not mounted");
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}
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break;
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}
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if (errCode != PASS) {
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return null;
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}
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return newCachePath;
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}
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public static boolean copyToFile(InputStream inputStream, FileOutputStream out) {
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try {
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byte[] buffer = new byte[4096];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) >= 0) {
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out.write(buffer, 0, bytesRead);
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}
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return true;
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} catch (IOException e) {
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Log.i(TAG, "Exception : " + e + " when copying file");
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return false;
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}
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}
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public static boolean copyToFile(File srcFile, FileOutputStream out) {
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InputStream inputStream = null;
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try {
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inputStream = new FileInputStream(srcFile);
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return copyToFile(inputStream, out);
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} catch (IOException e) {
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return false;
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} finally {
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try { if (inputStream != null) inputStream.close(); } catch (IOException e) {}
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}
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}
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private boolean copyFile(Uri pPackageURI, FileOutputStream outStream) {
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if (pPackageURI.getScheme().equals("file")) {
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final File srcPackageFile = new File(pPackageURI.getPath());
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// We copy the source package file to a temp file and then rename it to the
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// destination file in order to eliminate a window where the package directory
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// scanner notices the new package file but it's not completely copied yet.
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if (!copyToFile(srcPackageFile, outStream)) {
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Log.e(TAG, "Couldn't copy file: " + srcPackageFile);
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return false;
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}
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} else if (pPackageURI.getScheme().equals("content")) {
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ParcelFileDescriptor fd = null;
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try {
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fd = getContentResolver().openFileDescriptor(pPackageURI, "r");
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} catch (FileNotFoundException e) {
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Log.e(TAG, "Couldn't open file descriptor from download service. Failed with exception " + e);
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return false;
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}
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if (fd == null) {
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Log.e(TAG, "Couldn't open file descriptor from download service (null).");
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return false;
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} else {
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if (localLOGV) {
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Log.v(TAG, "Opened file descriptor from download service.");
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}
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ParcelFileDescriptor.AutoCloseInputStream
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dlStream = new ParcelFileDescriptor.AutoCloseInputStream(fd);
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// We copy the source package file to a temp file and then rename it to the
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// destination file in order to eliminate a window where the package directory
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// scanner notices the new package file but it's not completely copied yet.
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if (!copyToFile(dlStream, outStream)) {
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Log.e(TAG, "Couldn't copy " + pPackageURI + " to temp file.");
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return false;
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}
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}
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} else {
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Log.e(TAG, "Package URI is not 'file:' or 'content:' - " + pPackageURI);
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return false;
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}
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return true;
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}
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// Constants related to app heuristics
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// No-installation limit for internal flash: 10% or less space available
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private static final double LOW_NAND_FLASH_TRESHOLD = 0.1;
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// SD-to-internal app size threshold: currently set to 1 MB
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private static final long INSTALL_ON_SD_THRESHOLD = (1024 * 1024);
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private static final int ERR_LOC = -1;
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public int recommendAppInstallLocation(Package pkg) {
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// Initial implementation:
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// Package size = code size + cache size + data size
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// If code size > 1 MB, install on SD card.
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// Else install on internal NAND flash, unless space on NAND is less than 10%
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if (pkg == null) {
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return ERR_LOC;
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}
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StatFs internalFlashStats = new StatFs(Environment.getDataDirectory().getPath());
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StatFs sdcardStats = new StatFs(Environment.getExternalStorageDirectory().getPath());
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long totalInternalFlashSize = (long)internalFlashStats.getBlockCount() *
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(long)internalFlashStats.getBlockSize();
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long availInternalFlashSize = (long)internalFlashStats.getAvailableBlocks() *
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(long)internalFlashStats.getBlockSize();
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long availSDSize = (long)sdcardStats.getAvailableBlocks() *
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(long)sdcardStats.getBlockSize();
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double pctNandFree = (double)availInternalFlashSize / (double)totalInternalFlashSize;
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final String archiveFilePath = pkg.mScanPath;
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File apkFile = new File(archiveFilePath);
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long pkgLen = apkFile.length();
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boolean auto = true;
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// To make final copy
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long reqInstallSize = pkgLen;
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// For dex files
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long reqInternalSize = 1 * pkgLen;
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boolean intThresholdOk = (pctNandFree >= LOW_NAND_FLASH_TRESHOLD);
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boolean intAvailOk = ((reqInstallSize + reqInternalSize) < availInternalFlashSize);
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boolean fitsOnSd = (reqInstallSize < availSDSize) && intThresholdOk &&
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(reqInternalSize < availInternalFlashSize);
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boolean fitsOnInt = intThresholdOk && intAvailOk;
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// Consider application flags preferences as well...
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boolean installOnlyOnSd = (pkg.installLocation ==
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PackageInfo.INSTALL_LOCATION_PREFER_EXTERNAL);
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boolean installOnlyInternal = (pkg.installLocation ==
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PackageInfo.INSTALL_LOCATION_INTERNAL_ONLY);
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if (installOnlyInternal) {
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// If set explicitly in manifest,
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// let that override everything else
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auto = false;
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} else if (installOnlyOnSd){
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// Check if this can be accommodated on the sdcard
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if (fitsOnSd) {
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auto = false;
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}
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} else {
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// Check if user option is enabled
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boolean setInstallLoc = Settings.System.getInt(getApplicationContext()
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.getContentResolver(),
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Settings.System.SET_INSTALL_LOCATION, 0) != 0;
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if (setInstallLoc) {
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// Pick user preference
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int installPreference = Settings.System.getInt(getApplicationContext()
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.getContentResolver(),
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Settings.System.DEFAULT_INSTALL_LOCATION,
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PackageInfo.INSTALL_LOCATION_AUTO);
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if (installPreference == 1) {
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installOnlyInternal = true;
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auto = false;
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} else if (installPreference == 2) {
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installOnlyOnSd = true;
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auto = false;
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}
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}
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}
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if (!auto) {
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if (installOnlyOnSd) {
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return fitsOnSd ? PackageManager.INSTALL_EXTERNAL : ERR_LOC;
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} else if (installOnlyInternal){
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// Check on internal flash
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return fitsOnInt ? 0 : ERR_LOC;
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}
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}
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// Try to install internally
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if (fitsOnInt) {
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return 0;
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}
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// Try the sdcard now.
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if (fitsOnSd) {
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return PackageManager.INSTALL_EXTERNAL;
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}
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// Return error code
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return ERR_LOC;
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}
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}
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