/*
* 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.ArrayUtils;
import com.android.internal.util.FastXmlSerializer;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManagerNative;
import android.app.IStopUserCallback;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.content.pm.UserInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Binder;
import android.os.Environment;
import android.os.FileUtils;
import android.os.IUserManager;
import android.os.Process;
import android.os.RemoteException;
import android.os.UserHandle;
import android.os.UserManager;
import android.util.AtomicFile;
import android.util.Slog;
import android.util.SparseArray;
import android.util.TimeUtils;
import android.util.Xml;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;
public class UserManagerService extends IUserManager.Stub {
private static final String LOG_TAG = "UserManagerService";
private static final boolean DBG = false;
private static final String TAG_NAME = "name";
private static final String ATTR_FLAGS = "flags";
private static final String ATTR_ICON_PATH = "icon";
private static final String ATTR_ID = "id";
private static final String ATTR_CREATION_TIME = "created";
private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn";
private static final String ATTR_SERIAL_NO = "serialNumber";
private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber";
private static final String ATTR_PARTIAL = "partial";
private static final String ATTR_USER_VERSION = "version";
private static final String TAG_USERS = "users";
private static final String TAG_USER = "user";
private static final String USER_INFO_DIR = "system" + File.separator + "users";
private static final String USER_LIST_FILENAME = "userlist.xml";
private static final String USER_PHOTO_FILENAME = "photo.png";
private static final int MIN_USER_ID = 10;
private static final int USER_VERSION = 1;
private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms
private final Context mContext;
private final PackageManagerService mPm;
private final Object mInstallLock;
private final Object mPackagesLock;
private final File mUsersDir;
private final File mUserListFile;
private final File mBaseUserPath;
private SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>();
private HashSet<Integer> mRemovingUserIds = new HashSet<Integer>();
private int[] mUserIds;
private boolean mGuestEnabled;
private int mNextSerialNumber;
// This resets on a reboot. Otherwise it keeps incrementing so that user ids are
// not reused in quick succession
private int mNextUserId = MIN_USER_ID;
private int mUserVersion = 0;
private static UserManagerService sInstance;
public static UserManagerService getInstance() {
synchronized (UserManagerService.class) {
return sInstance;
}
}
/**
* Available for testing purposes.
*/
UserManagerService(File dataDir, File baseUserPath) {
this(null, null, new Object(), new Object(), dataDir, baseUserPath);
}
/**
* Called by package manager to create the service. This is closely
* associated with the package manager, and the given lock is the
* package manager's own lock.
*/
UserManagerService(Context context, PackageManagerService pm,
Object installLock, Object packagesLock) {
this(context, pm, installLock, packagesLock,
Environment.getDataDirectory(),
new File(Environment.getDataDirectory(), "user"));
}
/**
* Available for testing purposes.
*/
private UserManagerService(Context context, PackageManagerService pm,
Object installLock, Object packagesLock,
File dataDir, File baseUserPath) {
mContext = context;
mPm = pm;
mInstallLock = installLock;
mPackagesLock = packagesLock;
synchronized (mInstallLock) {
synchronized (mPackagesLock) {
mUsersDir = new File(dataDir, USER_INFO_DIR);
mUsersDir.mkdirs();
// Make zeroth user directory, for services to migrate their files to that location
File userZeroDir = new File(mUsersDir, "0");
userZeroDir.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);
readUserListLocked();
// Prune out any partially created/partially removed users.
ArrayList<UserInfo> partials = new ArrayList<UserInfo>();
for (int i = 0; i < mUsers.size(); i++) {
UserInfo ui = mUsers.valueAt(i);
if (ui.partial && i != 0) {
partials.add(ui);
}
}
for (int i = 0; i < partials.size(); i++) {
UserInfo ui = partials.get(i);
Slog.w(LOG_TAG, "Removing partially created user #" + i
+ " (name=" + ui.name + ")");
removeUserStateLocked(ui.id);
}
sInstance = this;
}
}
}
@Override
public List<UserInfo> getUsers(boolean excludeDying) {
checkManageUsersPermission("query users");
synchronized (mPackagesLock) {
ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size());
for (int i = 0; i < mUsers.size(); i++) {
UserInfo ui = mUsers.valueAt(i);
if (ui.partial) {
continue;
}
if (!excludeDying || !mRemovingUserIds.contains(ui.id)) {
users.add(ui);
}
}
return users;
}
}
@Override
public UserInfo getUserInfo(int userId) {
checkManageUsersPermission("query user");
synchronized (mPackagesLock) {
return getUserInfoLocked(userId);
}
}
/*
* Should be locked on mUsers before calling this.
*/
private UserInfo getUserInfoLocked(int userId) {
UserInfo ui = mUsers.get(userId);
// If it is partial and not in the process of being removed, return as unknown user.
if (ui != null && ui.partial && !mRemovingUserIds.contains(userId)) {
Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId);
return null;
}
return ui;
}
public boolean exists(int userId) {
synchronized (mPackagesLock) {
return ArrayUtils.contains(mUserIds, userId);
}
}
@Override
public void setUserName(int userId, String name) {
checkManageUsersPermission("rename users");
boolean changed = false;
synchronized (mPackagesLock) {
UserInfo info = mUsers.get(userId);
if (info == null || info.partial) {
Slog.w(LOG_TAG, "setUserName: unknown user #" + userId);
return;
}
if (name != null && !name.equals(info.name)) {
info.name = name;
writeUserLocked(info);
changed = true;
}
}
if (changed) {
sendUserInfoChangedBroadcast(userId);
}
}
@Override
public void setUserIcon(int userId, Bitmap bitmap) {
checkManageUsersPermission("update users");
synchronized (mPackagesLock) {
UserInfo info = mUsers.get(userId);
if (info == null || info.partial) {
Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId);
return;
}
writeBitmapLocked(info, bitmap);
writeUserLocked(info);
}
sendUserInfoChangedBroadcast(userId);
}
private void sendUserInfoChangedBroadcast(int userId) {
Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED);
changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId);
changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
mContext.sendBroadcastAsUser(changedIntent, new UserHandle(userId));
}
@Override
public Bitmap getUserIcon(int userId) {
checkManageUsersPermission("read users");
synchronized (mPackagesLock) {
UserInfo info = mUsers.get(userId);
if (info == null || info.partial) {
Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId);
return null;
}
if (info.iconPath == null) {
return null;
}
return BitmapFactory.decodeFile(info.iconPath);
}
}
@Override
public void setGuestEnabled(boolean enable) {
checkManageUsersPermission("enable guest users");
synchronized (mPackagesLock) {
if (mGuestEnabled != enable) {
mGuestEnabled = enable;
// Erase any guest user that currently exists
for (int i = 0; i < mUsers.size(); i++) {
UserInfo user = mUsers.valueAt(i);
if (!user.partial && user.isGuest()) {
if (!enable) {
removeUser(user.id);
}
return;
}
}
// No guest was found
if (enable) {
createUser("Guest", UserInfo.FLAG_GUEST);
}
}
}
}
@Override
public boolean isGuestEnabled() {
synchronized (mPackagesLock) {
return mGuestEnabled;
}
}
@Override
public void wipeUser(int userHandle) {
checkManageUsersPermission("wipe user");
// TODO:
}
public void makeInitialized(int userId) {
checkManageUsersPermission("makeInitialized");
synchronized (mPackagesLock) {
UserInfo info = mUsers.get(userId);
if (info == null || info.partial) {
Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId);
}
if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) {
info.flags |= UserInfo.FLAG_INITIALIZED;
writeUserLocked(info);
}
}
}
/**
* Check if we've hit the limit of how many users can be created.
*/
private boolean isUserLimitReachedLocked() {
int nUsers = mUsers.size();
return nUsers >= UserManager.getMaxSupportedUsers();
}
/**
* Enforces that only the system UID or root's UID or apps that have the
* {@link android.Manifest.permission.MANAGE_USERS MANAGE_USERS}
* permission can make certain calls to the UserManager.
*
* @param message used as message if SecurityException is thrown
* @throws SecurityException if the caller is not system or root
*/
private static final void checkManageUsersPermission(String message) {
final int uid = Binder.getCallingUid();
if (uid != Process.SYSTEM_UID && uid != 0
&& ActivityManager.checkComponentPermission(
android.Manifest.permission.MANAGE_USERS,
uid, -1, true) != PackageManager.PERMISSION_GRANTED) {
throw new SecurityException("You need MANAGE_USERS permission to: " + message);
}
}
private void writeBitmapLocked(UserInfo info, Bitmap bitmap) {
try {
File dir = new File(mUsersDir, Integer.toString(info.id));
File file = new File(dir, USER_PHOTO_FILENAME);
if (!dir.exists()) {
dir.mkdir();
FileUtils.setPermissions(
dir.getPath(),
FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH,
-1, -1);
}
FileOutputStream os;
if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) {
info.iconPath = file.getAbsolutePath();
}
try {
os.close();
} catch (IOException ioe) {
// What the ... !
}
} catch (FileNotFoundException e) {
Slog.w(LOG_TAG, "Error setting photo for user ", e);
}
}
/**
* 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.
*/
public int[] getUserIds() {
synchronized (mPackagesLock) {
return mUserIds;
}
}
int[] getUserIdsLPr() {
return mUserIds;
}
private void readUserList() {
synchronized (mPackagesLock) {
readUserListLocked();
}
}
private void readUserListLocked() {
mGuestEnabled = false;
if (!mUserListFile.exists()) {
fallbackToSingleUserLocked();
return;
}
FileInputStream fis = null;
AtomicFile userListFile = new AtomicFile(mUserListFile);
try {
fis = userListFile.openRead();
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");
fallbackToSingleUserLocked();
return;
}
mNextSerialNumber = -1;
if (parser.getName().equals(TAG_USERS)) {
String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO);
if (lastSerialNumber != null) {
mNextSerialNumber = Integer.parseInt(lastSerialNumber);
}
String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION);
if (versionNumber != null) {
mUserVersion = Integer.parseInt(versionNumber);
}
}
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);
if (user.isGuest()) {
mGuestEnabled = true;
}
if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) {
mNextSerialNumber = user.id + 1;
}
}
}
}
updateUserIdsLocked();
upgradeIfNecessary();
} catch (IOException ioe) {
fallbackToSingleUserLocked();
} catch (XmlPullParserException pe) {
fallbackToSingleUserLocked();
} finally {
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
}
}
}
}
/**
* This fixes an incorrect initialization of user name for the owner.
* TODO: Remove in the next release.
*/
private void upgradeIfNecessary() {
int userVersion = mUserVersion;
if (userVersion < 1) {
// Assign a proper name for the owner, if not initialized correctly before
UserInfo user = mUsers.get(UserHandle.USER_OWNER);
if ("Primary".equals(user.name)) {
user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name);
writeUserLocked(user);
}
userVersion = 1;
}
if (userVersion < USER_VERSION) {
Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to "
+ USER_VERSION);
} else {
mUserVersion = userVersion;
writeUserListLocked();
}
}
private void fallbackToSingleUserLocked() {
// Create the primary user
UserInfo primary = new UserInfo(0,
mContext.getResources().getString(com.android.internal.R.string.owner_name), null,
UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED);
mUsers.put(0, primary);
mNextSerialNumber = MIN_USER_ID;
updateUserIdsLocked();
writeUserListLocked();
writeUserLocked(primary);
}
/*
* Writes the user file in this format:
*
* <user flags="20039023" id="0">
* <name>Primary</name>
* </user>
*/
private void writeUserLocked(UserInfo userInfo) {
FileOutputStream fos = null;
AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + ".xml"));
try {
fos = userFile.startWrite();
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_SERIAL_NO, Integer.toString(userInfo.serialNumber));
serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags));
serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime));
serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME,
Long.toString(userInfo.lastLoggedInTime));
if (userInfo.iconPath != null) {
serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath);
}
if (userInfo.partial) {
serializer.attribute(null, ATTR_PARTIAL, "true");
}
serializer.startTag(null, TAG_NAME);
serializer.text(userInfo.name);
serializer.endTag(null, TAG_NAME);
serializer.endTag(null, TAG_USER);
serializer.endDocument();
userFile.finishWrite(fos);
} catch (Exception ioe) {
Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe);
userFile.failWrite(fos);
}
}
/*
* Writes the user list file in this format:
*
* <users nextSerialNumber="3">
* <user id="0"></user>
* <user id="2"></user>
* </users>
*/
private void writeUserListLocked() {
FileOutputStream fos = null;
AtomicFile userListFile = new AtomicFile(mUserListFile);
try {
fos = userListFile.startWrite();
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);
serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber));
serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion));
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();
userListFile.finishWrite(fos);
} catch (Exception e) {
userListFile.failWrite(fos);
Slog.e(LOG_TAG, "Error writing user list");
}
}
private UserInfo readUser(int id) {
int flags = 0;
int serialNumber = id;
String name = null;
String iconPath = null;
long creationTime = 0L;
long lastLoggedInTime = 0L;
boolean partial = false;
FileInputStream fis = null;
try {
AtomicFile userFile =
new AtomicFile(new File(mUsersDir, Integer.toString(id) + ".xml"));
fis = userFile.openRead();
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)) {
int storedId = readIntAttribute(parser, ATTR_ID, -1);
if (storedId != id) {
Slog.e(LOG_TAG, "User id does not match the file name");
return null;
}
serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id);
flags = readIntAttribute(parser, ATTR_FLAGS, 0);
iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH);
creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0);
lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0);
String valueString = parser.getAttributeValue(null, ATTR_PARTIAL);
if ("true".equals(valueString)) {
partial = true;
}
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();
}
}
}
UserInfo userInfo = new UserInfo(id, name, iconPath, flags);
userInfo.serialNumber = serialNumber;
userInfo.creationTime = creationTime;
userInfo.lastLoggedInTime = lastLoggedInTime;
userInfo.partial = partial;
return userInfo;
} catch (IOException ioe) {
} catch (XmlPullParserException pe) {
} finally {
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
}
}
}
return null;
}
private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) {
String valueString = parser.getAttributeValue(null, attr);
if (valueString == null) return defaultValue;
try {
return Integer.parseInt(valueString);
} catch (NumberFormatException nfe) {
return defaultValue;
}
}
private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) {
String valueString = parser.getAttributeValue(null, attr);
if (valueString == null) return defaultValue;
try {
return Long.parseLong(valueString);
} catch (NumberFormatException nfe) {
return defaultValue;
}
}
@Override
public UserInfo createUser(String name, int flags) {
checkManageUsersPermission("Only the system can create users");
final long ident = Binder.clearCallingIdentity();
final UserInfo userInfo;
try {
synchronized (mInstallLock) {
synchronized (mPackagesLock) {
if (isUserLimitReachedLocked()) return null;
int userId = getNextAvailableIdLocked();
userInfo = new UserInfo(userId, name, null, flags);
File userPath = new File(mBaseUserPath, Integer.toString(userId));
userInfo.serialNumber = mNextSerialNumber++;
long now = System.currentTimeMillis();
userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0;
userInfo.partial = true;
Environment.getUserSystemDirectory(userInfo.id).mkdirs();
mUsers.put(userId, userInfo);
writeUserListLocked();
writeUserLocked(userInfo);
mPm.createNewUserLILPw(userId, userPath);
userInfo.partial = false;
writeUserLocked(userInfo);
updateUserIdsLocked();
}
}
if (userInfo != null) {
Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED);
addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id);
mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL,
android.Manifest.permission.MANAGE_USERS);
}
} finally {
Binder.restoreCallingIdentity(ident);
}
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 boolean removeUser(int userHandle) {
checkManageUsersPermission("Only the system can remove users");
final UserInfo user;
synchronized (mPackagesLock) {
user = mUsers.get(userHandle);
if (userHandle == 0 || user == null) {
return false;
}
mRemovingUserIds.add(userHandle);
// Set this to a partially created user, so that the user will be purged
// on next startup, in case the runtime stops now before stopping and
// removing the user completely.
user.partial = true;
writeUserLocked(user);
}
if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle);
int res;
try {
res = ActivityManagerNative.getDefault().stopUser(userHandle,
new IStopUserCallback.Stub() {
@Override
public void userStopped(int userId) {
finishRemoveUser(userId);
}
@Override
public void userStopAborted(int userId) {
}
});
} catch (RemoteException e) {
return false;
}
return res == ActivityManager.USER_OP_SUCCESS;
}
void finishRemoveUser(final int userHandle) {
if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle);
// Let other services shutdown any activity and clean up their state before completely
// wiping the user's system directory and removing from the user list
long ident = Binder.clearCallingIdentity();
try {
Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED);
addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle);
mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL,
android.Manifest.permission.MANAGE_USERS,
new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (DBG) {
Slog.i(LOG_TAG,
"USER_REMOVED broadcast sent, cleaning up user data "
+ userHandle);
}
new Thread() {
public void run() {
synchronized (mInstallLock) {
synchronized (mPackagesLock) {
removeUserStateLocked(userHandle);
}
}
}
}.start();
}
},
null, Activity.RESULT_OK, null, null);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
private void removeUserStateLocked(int userHandle) {
// Cleanup package manager settings
mPm.cleanUpUserLILPw(userHandle);
// Remove this user from the list
mUsers.remove(userHandle);
mRemovingUserIds.remove(userHandle);
// Remove user file
AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + ".xml"));
userFile.delete();
// Update the user list
writeUserListLocked();
updateUserIdsLocked();
removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle));
}
private void removeDirectoryRecursive(File parent) {
if (parent.isDirectory()) {
String[] files = parent.list();
for (String filename : files) {
File child = new File(parent, filename);
removeDirectoryRecursive(child);
}
}
parent.delete();
}
@Override
public int getUserSerialNumber(int userHandle) {
synchronized (mPackagesLock) {
if (!exists(userHandle)) return -1;
return getUserInfoLocked(userHandle).serialNumber;
}
}
@Override
public int getUserHandle(int userSerialNumber) {
synchronized (mPackagesLock) {
for (int userId : mUserIds) {
if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId;
}
// Not found
return -1;
}
}
/**
* Caches the list of user ids in an array, adjusting the array size when necessary.
*/
private void updateUserIdsLocked() {
int num = 0;
for (int i = 0; i < mUsers.size(); i++) {
if (!mUsers.valueAt(i).partial) {
num++;
}
}
final int[] newUsers = new int[num];
int n = 0;
for (int i = 0; i < mUsers.size(); i++) {
if (!mUsers.valueAt(i).partial) {
newUsers[n++] = mUsers.keyAt(i);
}
}
mUserIds = newUsers;
}
/**
* Make a note of the last started time of a user.
* @param userId the user that was just foregrounded
*/
public void userForeground(int userId) {
synchronized (mPackagesLock) {
UserInfo user = mUsers.get(userId);
long now = System.currentTimeMillis();
if (user == null || user.partial) {
Slog.w(LOG_TAG, "userForeground: unknown user #" + userId);
return;
}
if (now > EPOCH_PLUS_30_YEARS) {
user.lastLoggedInTime = now;
writeUserLocked(user);
}
}
}
/**
* Returns the next available user id, filling in any holes in the ids.
* TODO: May not be a good idea to recycle ids, in case it results in confusion
* for data and battery stats collection, or unexpected cross-talk.
* @return
*/
private int getNextAvailableIdLocked() {
synchronized (mPackagesLock) {
int i = mNextUserId;
while (i < Integer.MAX_VALUE) {
if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.contains(i)) {
break;
}
i++;
}
mNextUserId = i + 1;
return i;
}
}
@Override
protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
!= PackageManager.PERMISSION_GRANTED) {
pw.println("Permission Denial: can't dump UserManager from from pid="
+ Binder.getCallingPid()
+ ", uid=" + Binder.getCallingUid()
+ " without permission "
+ android.Manifest.permission.DUMP);
return;
}
long now = System.currentTimeMillis();
StringBuilder sb = new StringBuilder();
synchronized (mPackagesLock) {
pw.println("Users:");
for (int i = 0; i < mUsers.size(); i++) {
UserInfo user = mUsers.valueAt(i);
if (user == null) continue;
pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber);
if (mRemovingUserIds.contains(mUsers.keyAt(i))) pw.print(" <removing> ");
if (user.partial) pw.print(" <partial>");
pw.println();
pw.print(" Created: ");
if (user.creationTime == 0) {
pw.println("<unknown>");
} else {
sb.setLength(0);
TimeUtils.formatDuration(now - user.creationTime, sb);
sb.append(" ago");
pw.println(sb);
}
pw.print(" Last logged in: ");
if (user.lastLoggedInTime == 0) {
pw.println("<unknown>");
} else {
sb.setLength(0);
TimeUtils.formatDuration(now - user.lastLoggedInTime, sb);
sb.append(" ago");
pw.println(sb);
}
}
}
}
}