/*
* Copyright (C) 2010 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.defcontainer;
import com.android.internal.app.IMediaContainerService;
import com.android.internal.content.PackageHelper;
import android.content.Intent;
import android.content.pm.IPackageManager;
import android.content.pm.PackageInfo;
import android.content.pm.PackageInfoLite;
import android.content.pm.PackageManager;
import android.content.pm.PackageParser;
import android.net.Uri;
import android.os.Environment;
import android.os.IBinder;
import android.os.ParcelFileDescriptor;
import android.os.Process;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.StatFs;
import android.app.IntentService;
import android.util.DisplayMetrics;
import android.util.Log;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import android.os.FileUtils;
import android.provider.Settings;
/*
* This service copies a downloaded apk to a file passed in as
* a ParcelFileDescriptor or to a newly created container specified
* by parameters. The DownloadManager gives access to this process
* based on its uid. This process also needs the ACCESS_DOWNLOAD_MANAGER
* permission to access apks downloaded via the download manager.
*/
public class DefaultContainerService extends IntentService {
private static final String TAG = "DefContainer";
private static final boolean localLOGV = true;
private IMediaContainerService.Stub mBinder = new IMediaContainerService.Stub() {
/*
* Creates a new container and copies resource there.
* @param paackageURI the uri of resource to be copied. Can be either
* a content uri or a file uri
* @param cid the id of the secure container that should
* be used for creating a secure container into which the resource
* will be copied.
* @param key Refers to key used for encrypting the secure container
* @param resFileName Name of the target resource file(relative to newly
* created secure container)
* @return Returns the new cache path where the resource has been copied into
*
*/
public String copyResourceToContainer(final Uri packageURI,
final String cid,
final String key, final String resFileName) {
if (packageURI == null || cid == null) {
return null;
}
return copyResourceInner(packageURI, cid, key, resFileName);
}
/*
* Copy specified resource to output stream
* @param packageURI the uri of resource to be copied. Should be a
* file uri
* @param outStream Remote file descriptor to be used for copying
* @return Returns true if copy succeded or false otherwise.
*/
public boolean copyResource(final Uri packageURI,
ParcelFileDescriptor outStream) {
if (packageURI == null || outStream == null) {
return false;
}
ParcelFileDescriptor.AutoCloseOutputStream
autoOut = new ParcelFileDescriptor.AutoCloseOutputStream(outStream);
return copyFile(packageURI, autoOut);
}
/*
* Determine the recommended install location for package
* specified by file uri location.
* @param fileUri the uri of resource to be copied. Should be a
* file uri
* @return Returns PackageInfoLite object containing
* the package info and recommended app location.
*/
public PackageInfoLite getMinimalPackageInfo(final Uri fileUri, int flags) {
PackageInfoLite ret = new PackageInfoLite();
if (fileUri == null) {
Log.i(TAG, "Invalid package uri " + fileUri);
ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_APK;
return ret;
}
String scheme = fileUri.getScheme();
if (scheme != null && !scheme.equals("file")) {
Log.w(TAG, "Falling back to installing on internal storage only");
ret.recommendedInstallLocation = PackageHelper.RECOMMEND_INSTALL_INTERNAL;
return ret;
}
String archiveFilePath = fileUri.getPath();
PackageParser packageParser = new PackageParser(archiveFilePath);
File sourceFile = new File(archiveFilePath);
DisplayMetrics metrics = new DisplayMetrics();
metrics.setToDefaults();
PackageParser.PackageLite pkg = packageParser.parsePackageLite(
archiveFilePath, 0);
ret.packageName = pkg.packageName;
ret.installLocation = pkg.installLocation;
// Nuke the parser reference right away and force a gc
packageParser = null;
Runtime.getRuntime().gc();
if (pkg == null) {
Log.w(TAG, "Failed to parse package");
ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_APK;
return ret;
}
ret.packageName = pkg.packageName;
ret.recommendedInstallLocation = recommendAppInstallLocation(pkg.installLocation, archiveFilePath, flags);
return ret;
}
public boolean checkFreeStorage(boolean external, Uri fileUri) {
return checkFreeStorageInner(external, fileUri);
}
};
public DefaultContainerService() {
super("DefaultContainerService");
setIntentRedelivery(true);
}
@Override
protected void onHandleIntent(Intent intent) {
if (PackageManager.ACTION_CLEAN_EXTERNAL_STORAGE.equals(intent.getAction())) {
IPackageManager pm = IPackageManager.Stub.asInterface(
ServiceManager.getService("package"));
String pkg = null;
try {
while ((pkg=pm.nextPackageToClean(pkg)) != null) {
eraseFiles(Environment.getExternalStorageAppDataDirectory(pkg));
eraseFiles(Environment.getExternalStorageAppMediaDirectory(pkg));
}
} catch (RemoteException e) {
}
}
}
void eraseFiles(File path) {
if (path.isDirectory()) {
String[] files = path.list();
if (files != null) {
for (String file : files) {
eraseFiles(new File(path, file));
}
}
}
path.delete();
}
public IBinder onBind(Intent intent) {
return mBinder;
}
private String copyResourceInner(Uri packageURI, String newCid, String key, String resFileName) {
// Make sure the sdcard is mounted.
String status = Environment.getExternalStorageState();
if (!status.equals(Environment.MEDIA_MOUNTED)) {
Log.w(TAG, "Make sure sdcard is mounted.");
return null;
}
// Create new container at newCachePath
String codePath = packageURI.getPath();
File codeFile = new File(codePath);
String newCachePath = null;
// Create new container
if ((newCachePath = PackageHelper.createSdDir(codeFile,
newCid, key, Process.myUid())) == null) {
Log.e(TAG, "Failed to create container " + newCid);
return null;
}
if (localLOGV) Log.i(TAG, "Created container for " + newCid
+ " at path : " + newCachePath);
File resFile = new File(newCachePath, resFileName);
if (!FileUtils.copyFile(new File(codePath), resFile)) {
Log.e(TAG, "Failed to copy " + codePath + " to " + resFile);
// Clean up container
PackageHelper.destroySdDir(newCid);
return null;
}
if (localLOGV) Log.i(TAG, "Copied " + codePath + " to " + resFile);
if (!PackageHelper.finalizeSdDir(newCid)) {
Log.e(TAG, "Failed to finalize " + newCid + " at path " + newCachePath);
// Clean up container
PackageHelper.destroySdDir(newCid);
}
if (localLOGV) Log.i(TAG, "Finalized container " + newCid);
if (PackageHelper.isContainerMounted(newCid)) {
if (localLOGV) Log.i(TAG, "Unmounting " + newCid +
" at path " + newCachePath);
// Force a gc to avoid being killed.
Runtime.getRuntime().gc();
PackageHelper.unMountSdDir(newCid);
} else {
if (localLOGV) Log.i(TAG, "Container " + newCid + " not mounted");
}
return newCachePath;
}
public static boolean copyToFile(InputStream inputStream, FileOutputStream out) {
try {
byte[] buffer = new byte[4096];
int bytesRead;
while ((bytesRead = inputStream.read(buffer)) >= 0) {
out.write(buffer, 0, bytesRead);
}
return true;
} catch (IOException e) {
Log.i(TAG, "Exception : " + e + " when copying file");
return false;
}
}
public static boolean copyToFile(File srcFile, FileOutputStream out) {
InputStream inputStream = null;
try {
inputStream = new FileInputStream(srcFile);
return copyToFile(inputStream, out);
} catch (IOException e) {
return false;
} finally {
try { if (inputStream != null) inputStream.close(); } catch (IOException e) {}
}
}
private boolean copyFile(Uri pPackageURI, FileOutputStream outStream) {
String scheme = pPackageURI.getScheme();
if (scheme == null || scheme.equals("file")) {
final File srcPackageFile = new File(pPackageURI.getPath());
// We copy the source package file to a temp file and then rename it to the
// destination file in order to eliminate a window where the package directory
// scanner notices the new package file but it's not completely copied yet.
if (!copyToFile(srcPackageFile, outStream)) {
Log.e(TAG, "Couldn't copy file: " + srcPackageFile);
return false;
}
} else if (scheme.equals("content")) {
ParcelFileDescriptor fd = null;
try {
fd = getContentResolver().openFileDescriptor(pPackageURI, "r");
} catch (FileNotFoundException e) {
Log.e(TAG, "Couldn't open file descriptor from download service. Failed with exception " + e);
return false;
}
if (fd == null) {
Log.e(TAG, "Couldn't open file descriptor from download service (null).");
return false;
} else {
if (localLOGV) {
Log.v(TAG, "Opened file descriptor from download service.");
}
ParcelFileDescriptor.AutoCloseInputStream
dlStream = new ParcelFileDescriptor.AutoCloseInputStream(fd);
// We copy the source package file to a temp file and then rename it to the
// destination file in order to eliminate a window where the package directory
// scanner notices the new package file but it's not completely copied yet.
if (!copyToFile(dlStream, outStream)) {
Log.e(TAG, "Couldn't copy " + pPackageURI + " to temp file.");
return false;
}
}
} else {
Log.e(TAG, "Package URI is not 'file:' or 'content:' - " + pPackageURI);
return false;
}
return true;
}
// Constants related to app heuristics
// No-installation limit for internal flash: 10% or less space available
private static final double LOW_NAND_FLASH_TRESHOLD = 0.1;
// SD-to-internal app size threshold: currently set to 1 MB
private static final long INSTALL_ON_SD_THRESHOLD = (1024 * 1024);
private static final int ERR_LOC = -1;
private int recommendAppInstallLocation(int installLocation,
String archiveFilePath, int flags) {
boolean checkInt = false;
boolean checkExt = false;
boolean checkBoth = false;
check_inner : {
// Check flags.
if ((flags & PackageManager.INSTALL_FORWARD_LOCK) != 0) {
// Check for forward locked app
checkInt = true;
break check_inner;
} else if ((flags & PackageManager.INSTALL_INTERNAL) != 0) {
// Explicit flag to install internally.
// Check internal storage and return
checkInt = true;
break check_inner;
} else if ((flags & PackageManager.INSTALL_EXTERNAL) != 0) {
// Explicit flag to install externally.
// Check external storage and return
checkExt = true;
break check_inner;
}
// Check for manifest option
if (installLocation == PackageInfo.INSTALL_LOCATION_INTERNAL_ONLY) {
checkInt = true;
break check_inner;
} else if (installLocation == PackageInfo.INSTALL_LOCATION_PREFER_EXTERNAL) {
checkExt = true;
checkBoth = true;
break check_inner;
} else if (installLocation == PackageInfo.INSTALL_LOCATION_AUTO) {
checkInt = true;
checkBoth = true;
break check_inner;
}
// Pick user preference
int installPreference = Settings.System.getInt(getApplicationContext()
.getContentResolver(),
Settings.Secure.DEFAULT_INSTALL_LOCATION,
PackageHelper.APP_INSTALL_AUTO);
if (installPreference == PackageHelper.APP_INSTALL_INTERNAL) {
checkInt = true;
break check_inner;
} else if (installPreference == PackageHelper.APP_INSTALL_EXTERNAL) {
checkExt = true;
break check_inner;
}
// Fall back to default policy if nothing else is specified.
checkInt = true;
}
// Package size = code size + cache size + data size
// If code size > 1 MB, install on SD card.
// Else install on internal NAND flash, unless space on NAND is less than 10%
String status = Environment.getExternalStorageState();
long availSDSize = -1;
boolean mediaAvailable = false;
if (status.equals(Environment.MEDIA_MOUNTED)) {
StatFs sdStats = new StatFs(
Environment.getExternalStorageDirectory().getPath());
availSDSize = (long)sdStats.getAvailableBlocks() *
(long)sdStats.getBlockSize();
mediaAvailable = true;
}
StatFs internalStats = new StatFs(Environment.getDataDirectory().getPath());
long totalInternalSize = (long)internalStats.getBlockCount() *
(long)internalStats.getBlockSize();
long availInternalSize = (long)internalStats.getAvailableBlocks() *
(long)internalStats.getBlockSize();
double pctNandFree = (double)availInternalSize / (double)totalInternalSize;
File apkFile = new File(archiveFilePath);
long pkgLen = apkFile.length();
// To make final copy
long reqInstallSize = pkgLen;
// For dex files. Just ignore and fail when extracting. Max limit of 2Gig for now.
long reqInternalSize = 0;
boolean intThresholdOk = (pctNandFree >= LOW_NAND_FLASH_TRESHOLD);
boolean intAvailOk = ((reqInstallSize + reqInternalSize) < availInternalSize);
boolean fitsOnSd = false;
if (mediaAvailable && (reqInstallSize < availSDSize)) {
// If we do not have an internal size requirement
// don't do a threshold check.
if (reqInternalSize == 0) {
fitsOnSd = true;
} else if ((reqInternalSize < availInternalSize) && intThresholdOk) {
fitsOnSd = true;
}
}
boolean fitsOnInt = intThresholdOk && intAvailOk;
if (checkInt) {
// Check for internal memory availability
if (fitsOnInt) {
return PackageHelper.RECOMMEND_INSTALL_INTERNAL;
}
} else if (checkExt) {
if (fitsOnSd) {
return PackageHelper.RECOMMEND_INSTALL_EXTERNAL;
}
}
if (checkBoth) {
// Check for internal first
if (fitsOnInt) {
return PackageHelper.RECOMMEND_INSTALL_INTERNAL;
}
// Check for external next
if (fitsOnSd) {
return PackageHelper.RECOMMEND_INSTALL_EXTERNAL;
}
}
if ((checkExt || checkBoth) && !mediaAvailable) {
return PackageHelper.RECOMMEND_MEDIA_UNAVAILABLE;
}
return PackageHelper.RECOMMEND_FAILED_INSUFFICIENT_STORAGE;
}
private boolean checkFreeStorageInner(boolean external, Uri packageURI) {
File apkFile = new File(packageURI.getPath());
long size = apkFile.length();
if (external) {
String status = Environment.getExternalStorageState();
long availSDSize = -1;
if (status.equals(Environment.MEDIA_MOUNTED)) {
StatFs sdStats = new StatFs(
Environment.getExternalStorageDirectory().getPath());
availSDSize = (long)sdStats.getAvailableBlocks() *
(long)sdStats.getBlockSize();
}
return availSDSize > size;
}
StatFs internalStats = new StatFs(Environment.getDataDirectory().getPath());
long totalInternalSize = (long)internalStats.getBlockCount() *
(long)internalStats.getBlockSize();
long availInternalSize = (long)internalStats.getAvailableBlocks() *
(long)internalStats.getBlockSize();
double pctNandFree = (double)availInternalSize / (double)totalInternalSize;
// To make final copy
long reqInstallSize = size;
// For dex files. Just ignore and fail when extracting. Max limit of 2Gig for now.
long reqInternalSize = 0;
boolean intThresholdOk = (pctNandFree >= LOW_NAND_FLASH_TRESHOLD);
boolean intAvailOk = ((reqInstallSize + reqInternalSize) < availInternalSize);
return intThresholdOk && intAvailOk;
}
}