Plumbing in PackageManager and installd for multi-user support.
- Create /data/user directory and symlink /data/user/0 -> /data/data for
backward compatibility
- Create data directories for all packages for new user
- Remove data directories when removing a user
- Create data directories for all users when a package is created
- Clear / Remove data for multiple users
- Fixed a bug in verifying the location of a system app
- pm commands for createUser and removeUser (will be disabled later)
- symlink duplicate lib directories to the original lib directory
Change-Id: Id9fdfcf0e62406a8896aa811314dfc08d5f6ed95
diff --git a/services/java/com/android/server/pm/UserManager.java b/services/java/com/android/server/pm/UserManager.java
new file mode 100644
index 0000000..76fa5ab
--- /dev/null
+++ b/services/java/com/android/server/pm/UserManager.java
@@ -0,0 +1,401 @@
+/*
+ * Copyright (C) 2011 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.pm;
+
+import com.android.internal.util.FastXmlSerializer;
+
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.UserInfo;
+import android.os.Environment;
+import android.os.FileUtils;
+import android.os.SystemClock;
+import android.util.Log;
+import android.util.Slog;
+import android.util.SparseArray;
+import android.util.Xml;
+
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+import org.xmlpull.v1.XmlSerializer;
+
+public class UserManager {
+ private static final String TAG_NAME = "name";
+
+ private static final String ATTR_FLAGS = "flags";
+
+ private static final String ATTR_ID = "id";
+
+ private static final String TAG_USERS = "users";
+
+ private static final String TAG_USER = "user";
+
+ private static final String LOG_TAG = "UserManager";
+
+ private static final String USER_INFO_DIR = "system" + File.separator + "users";
+ private static final String USER_LIST_FILENAME = "userlist.xml";
+
+ private SparseArray<UserInfo> mUsers;
+
+ private final File mUsersDir;
+ private final File mUserListFile;
+ private int[] mUserIds;
+
+ private Installer mInstaller;
+ private File mBaseUserPath;
+
+ /**
+ * Available for testing purposes.
+ */
+ UserManager(File dataDir, File baseUserPath) {
+ mUsersDir = new File(dataDir, USER_INFO_DIR);
+ mUsersDir.mkdirs();
+ mBaseUserPath = baseUserPath;
+ FileUtils.setPermissions(mUsersDir.toString(),
+ FileUtils.S_IRWXU|FileUtils.S_IRWXG
+ |FileUtils.S_IROTH|FileUtils.S_IXOTH,
+ -1, -1);
+ mUserListFile = new File(mUsersDir, USER_LIST_FILENAME);
+ readUserList();
+ }
+
+ public UserManager(Installer installer, File baseUserPath) {
+ this(Environment.getDataDirectory(), baseUserPath);
+ mInstaller = installer;
+ }
+
+ public List<UserInfo> getUsers() {
+ ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size());
+ for (int i = 0; i < mUsers.size(); i++) {
+ users.add(mUsers.valueAt(i));
+ }
+ return users;
+ }
+
+ /**
+ * Returns an array of user ids. This array is cached here for quick access, so do not modify or
+ * cache it elsewhere.
+ * @return the array of user ids.
+ */
+ int[] getUserIds() {
+ return mUserIds;
+ }
+
+ private void readUserList() {
+ mUsers = new SparseArray<UserInfo>();
+ if (!mUserListFile.exists()) {
+ fallbackToSingleUser();
+ return;
+ }
+ FileInputStream fis = null;
+ try {
+ fis = new FileInputStream(mUserListFile);
+ XmlPullParser parser = Xml.newPullParser();
+ parser.setInput(fis, null);
+ int type;
+ while ((type = parser.next()) != XmlPullParser.START_TAG
+ && type != XmlPullParser.END_DOCUMENT) {
+ ;
+ }
+
+ if (type != XmlPullParser.START_TAG) {
+ Slog.e(LOG_TAG, "Unable to read user list");
+ fallbackToSingleUser();
+ return;
+ }
+
+ while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) {
+ if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) {
+ String id = parser.getAttributeValue(null, ATTR_ID);
+ UserInfo user = readUser(Integer.parseInt(id));
+ if (user != null) {
+ mUsers.put(user.id, user);
+ }
+ }
+ }
+ updateUserIds();
+ } catch (IOException ioe) {
+ fallbackToSingleUser();
+ } catch (XmlPullParserException pe) {
+ fallbackToSingleUser();
+ }
+ }
+
+ private void fallbackToSingleUser() {
+ // Create the primary user
+ UserInfo primary = new UserInfo(0, "Primary",
+ UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY);
+ mUsers.put(0, primary);
+ updateUserIds();
+
+ writeUserList();
+ writeUser(primary);
+ }
+
+ /*
+ * Writes the user file in this format:
+ *
+ * <user flags="20039023" id="0">
+ * <name>Primary</name>
+ * </user>
+ */
+ private void writeUser(UserInfo userInfo) {
+ try {
+ final File mUserFile = new File(mUsersDir, userInfo.id + ".xml");
+ final FileOutputStream fos = new FileOutputStream(mUserFile);
+ final BufferedOutputStream bos = new BufferedOutputStream(fos);
+
+ // XmlSerializer serializer = XmlUtils.serializerInstance();
+ final XmlSerializer serializer = new FastXmlSerializer();
+ serializer.setOutput(bos, "utf-8");
+ serializer.startDocument(null, true);
+ serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true);
+
+ serializer.startTag(null, TAG_USER);
+ serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id));
+ serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags));
+
+ serializer.startTag(null, TAG_NAME);
+ serializer.text(userInfo.name);
+ serializer.endTag(null, TAG_NAME);
+
+ serializer.endTag(null, TAG_USER);
+
+ serializer.endDocument();
+ } catch (IOException ioe) {
+ Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe);
+ }
+ }
+
+ /*
+ * Writes the user list file in this format:
+ *
+ * <users>
+ * <user id="0"></user>
+ * <user id="2"></user>
+ * </users>
+ */
+ private void writeUserList() {
+ try {
+ final FileOutputStream fos = new FileOutputStream(mUserListFile);
+ final BufferedOutputStream bos = new BufferedOutputStream(fos);
+
+ // XmlSerializer serializer = XmlUtils.serializerInstance();
+ final XmlSerializer serializer = new FastXmlSerializer();
+ serializer.setOutput(bos, "utf-8");
+ serializer.startDocument(null, true);
+ serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true);
+
+ serializer.startTag(null, TAG_USERS);
+
+ for (int i = 0; i < mUsers.size(); i++) {
+ UserInfo user = mUsers.valueAt(i);
+ serializer.startTag(null, TAG_USER);
+ serializer.attribute(null, ATTR_ID, Integer.toString(user.id));
+ serializer.endTag(null, TAG_USER);
+ }
+
+ serializer.endTag(null, TAG_USERS);
+
+ serializer.endDocument();
+ } catch (IOException ioe) {
+ Slog.e(LOG_TAG, "Error writing user list");
+ }
+ }
+
+ private UserInfo readUser(int id) {
+ int flags = 0;
+ String name = null;
+
+ FileInputStream fis = null;
+ try {
+ File userFile = new File(mUsersDir, Integer.toString(id) + ".xml");
+ fis = new FileInputStream(userFile);
+ XmlPullParser parser = Xml.newPullParser();
+ parser.setInput(fis, null);
+ int type;
+ while ((type = parser.next()) != XmlPullParser.START_TAG
+ && type != XmlPullParser.END_DOCUMENT) {
+ ;
+ }
+
+ if (type != XmlPullParser.START_TAG) {
+ Slog.e(LOG_TAG, "Unable to read user " + id);
+ return null;
+ }
+
+ if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) {
+ String storedId = parser.getAttributeValue(null, ATTR_ID);
+ if (Integer.parseInt(storedId) != id) {
+ Slog.e(LOG_TAG, "User id does not match the file name");
+ return null;
+ }
+ String flagString = parser.getAttributeValue(null, ATTR_FLAGS);
+ flags = Integer.parseInt(flagString);
+
+ while ((type = parser.next()) != XmlPullParser.START_TAG
+ && type != XmlPullParser.END_DOCUMENT) {
+ }
+ if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_NAME)) {
+ type = parser.next();
+ if (type == XmlPullParser.TEXT) {
+ name = parser.getText();
+ }
+ }
+ }
+ fis.close();
+
+ UserInfo userInfo = new UserInfo(id, name, flags);
+ return userInfo;
+
+ } catch (IOException ioe) {
+ } catch (XmlPullParserException pe) {
+ }
+ return null;
+ }
+
+ public UserInfo createUser(String name, int flags, List<ApplicationInfo> apps) {
+ int userId = getNextAvailableId();
+ UserInfo userInfo = new UserInfo(userId, name, flags);
+ File userPath = new File(mBaseUserPath, Integer.toString(userId));
+ if (!createPackageFolders(userId, userPath, apps)) {
+ return null;
+ }
+ mUsers.put(userId, userInfo);
+ writeUserList();
+ writeUser(userInfo);
+ updateUserIds();
+ return userInfo;
+ }
+
+ /**
+ * Removes a user and all data directories created for that user. This method should be called
+ * after the user's processes have been terminated.
+ * @param id the user's id
+ */
+ public void removeUser(int id) {
+ // Remove from the list
+ UserInfo userInfo = mUsers.get(id);
+ if (userInfo != null) {
+ // Remove this user from the list
+ mUsers.remove(id);
+ // Remove user file
+ File userFile = new File(mUsersDir, id + ".xml");
+ userFile.delete();
+ // Update the user list
+ writeUserList();
+ // Remove the data directories for all packages for this user
+ removePackageFolders(id);
+ updateUserIds();
+ }
+ }
+
+ public void installPackageForAllUsers(String packageName, int uid) {
+ for (int userId : mUserIds) {
+ // Don't do it for the primary user, it will become recursive.
+ if (userId == 0)
+ continue;
+ mInstaller.createUserData(packageName, PackageManager.getUid(userId, uid),
+ userId);
+ }
+ }
+
+ public void clearUserDataForAllUsers(String packageName) {
+ for (int userId : mUserIds) {
+ // Don't do it for the primary user, it will become recursive.
+ if (userId == 0)
+ continue;
+ mInstaller.clearUserData(packageName, userId);
+ }
+ }
+
+ public void removePackageForAllUsers(String packageName) {
+ for (int userId : mUserIds) {
+ // Don't do it for the primary user, it will become recursive.
+ if (userId == 0)
+ continue;
+ mInstaller.remove(packageName, userId);
+ }
+ }
+
+ /**
+ * Caches the list of user ids in an array, adjusting the array size when necessary.
+ */
+ private void updateUserIds() {
+ if (mUserIds == null || mUserIds.length != mUsers.size()) {
+ mUserIds = new int[mUsers.size()];
+ }
+ for (int i = 0; i < mUsers.size(); i++) {
+ mUserIds[i] = mUsers.keyAt(i);
+ }
+ }
+
+ /**
+ * Returns the next available user id, filling in any holes in the ids.
+ * @return
+ */
+ private int getNextAvailableId() {
+ int i = 0;
+ while (i < Integer.MAX_VALUE) {
+ if (mUsers.indexOfKey(i) < 0) {
+ break;
+ }
+ i++;
+ }
+ return i;
+ }
+
+ private boolean createPackageFolders(int id, File userPath, final List<ApplicationInfo> apps) {
+ // mInstaller may not be available for unit-tests.
+ if (mInstaller == null || apps == null) return true;
+
+ final long startTime = SystemClock.elapsedRealtime();
+ // Create the user path
+ userPath.mkdir();
+ FileUtils.setPermissions(userPath.toString(), FileUtils.S_IRWXU | FileUtils.S_IRWXG
+ | FileUtils.S_IXOTH, -1, -1);
+
+ // Create the individual data directories
+ for (ApplicationInfo app : apps) {
+ if (app.uid > android.os.Process.FIRST_APPLICATION_UID
+ && app.uid < PackageManager.PER_USER_RANGE) {
+ mInstaller.createUserData(app.packageName,
+ PackageManager.getUid(id, app.uid), id);
+ }
+ }
+ final long stopTime = SystemClock.elapsedRealtime();
+ Log.i(LOG_TAG,
+ "Time to create " + apps.size() + " packages = " + (stopTime - startTime) + "ms");
+ return true;
+ }
+
+ private boolean removePackageFolders(int id) {
+ // mInstaller may not be available for unit-tests.
+ if (mInstaller == null) return true;
+
+ mInstaller.removeUserDataDirs(id);
+ return true;
+ }
+}