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android / platform / frameworks / base / 5a5d6aeec0ee6b3f9ffea55a4f015edc84828b1e / . / services / core / java / com / android / server / pm / UserManagerService.java
blob: 3d614a35c13b4b02e7168460aa6a5a26b8359685 [file] [log] [blame]
/*
* 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 android.Manifest;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManagerInternal;
import android.app.ActivityManagerNative;
import android.app.IActivityManager;
import android.app.IStopUserCallback;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.UserInfo;
import android.graphics.Bitmap;
import android.os.Binder;
import android.os.Bundle;
import android.os.Debug;
import android.os.Environment;
import android.os.FileUtils;
import android.os.Handler;
import android.os.IUserManager;
import android.os.Message;
import android.os.ParcelFileDescriptor;
import android.os.Parcelable;
import android.os.Process;
import android.os.RemoteException;
import android.os.ResultReceiver;
import android.os.ServiceManager;
import android.os.ShellCommand;
import android.os.UserHandle;
import android.os.UserManager;
import android.os.UserManagerInternal;
import android.os.UserManagerInternal.UserRestrictionsListener;
import android.os.storage.StorageManager;
import android.os.storage.VolumeInfo;
import android.system.ErrnoException;
import android.system.Os;
import android.system.OsConstants;
import android.util.AtomicFile;
import android.util.Log;
import android.util.Pair;
import android.util.Slog;
import android.util.SparseArray;
import android.util.SparseBooleanArray;
import android.util.TimeUtils;
import android.util.Xml;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.app.IAppOpsService;
import com.android.internal.logging.MetricsLogger;
import com.android.internal.util.FastXmlSerializer;
import com.android.internal.util.Preconditions;
import com.android.internal.util.XmlUtils;
import com.android.internal.widget.LockPatternUtils;
import com.android.server.LocalServices;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;
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.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import libcore.io.IoUtils;
import libcore.util.Objects;
/**
* Service for {@link UserManager}.
*
* Method naming convention:
* <ul>
* <li> Methods suffixed with "LP" should be called within the {@link #mPackagesLock} lock.
* <li> Methods suffixed with "LR" should be called within the {@link #mRestrictionsLock} lock.
* <li> Methods suffixed with "LU" should be called within the {@link #mUsersLock} lock.
* </ul>
*/
public class UserManagerService extends IUserManager.Stub {
private static final String LOG_TAG = "UserManagerService";
static final boolean DBG = false; // DO NOT SUBMIT WITH TRUE
private static final boolean DBG_WITH_STACKTRACE = false; // DO NOT SUBMIT WITH TRUE
private static final String TAG_NAME = "name";
private static final String TAG_ACCOUNT = "account";
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_GUEST_TO_REMOVE = "guestToRemove";
private static final String ATTR_USER_VERSION = "version";
private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId";
private static final String ATTR_RESTRICTED_PROFILE_PARENT_ID = "restrictedProfileParentId";
private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions";
private static final String TAG_USERS = "users";
private static final String TAG_USER = "user";
private static final String TAG_RESTRICTIONS = "restrictions";
private static final String TAG_DEVICE_POLICY_RESTRICTIONS = "device_policy_restrictions";
private static final String TAG_ENTRY = "entry";
private static final String TAG_VALUE = "value";
private static final String ATTR_KEY = "key";
private static final String ATTR_VALUE_TYPE = "type";
private static final String ATTR_MULTIPLE = "m";
private static final String ATTR_TYPE_STRING_ARRAY = "sa";
private static final String ATTR_TYPE_STRING = "s";
private static final String ATTR_TYPE_BOOLEAN = "b";
private static final String ATTR_TYPE_INTEGER = "i";
private static final String ATTR_TYPE_BUNDLE = "B";
private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA";
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 String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp";
private static final String RESTRICTIONS_FILE_PREFIX = "res_";
private static final String XML_SUFFIX = ".xml";
private static final int MIN_USER_ID = 10;
// We need to keep process uid within Integer.MAX_VALUE.
private static final int MAX_USER_ID = Integer.MAX_VALUE / UserHandle.PER_USER_RANGE;
private static final int USER_VERSION = 6;
private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms
// Maximum number of managed profiles permitted per user is 1. This cannot be increased
// without first making sure that the rest of the framework is prepared for it.
private static final int MAX_MANAGED_PROFILES = 1;
static final int WRITE_USER_MSG = 1;
static final int WRITE_USER_DELAY = 2*1000; // 2 seconds
private static final String XATTR_SERIAL = "user.serial";
// Tron counters
private static final String TRON_GUEST_CREATED = "users_guest_created";
private static final String TRON_USER_CREATED = "users_user_created";
private final Context mContext;
private final PackageManagerService mPm;
private final Object mPackagesLock;
// Short-term lock for internal state, when interaction/sync with PM is not required
private final Object mUsersLock = new Object();
private final Object mRestrictionsLock = new Object();
private final Handler mHandler;
private final File mUsersDir;
private final File mUserListFile;
@GuardedBy("mUsersLock")
private final SparseArray<UserInfo> mUsers = new SparseArray<>();
/**
* This collection contains each user's account name if the user chose to set one up
* during the initial user creation process. Keeping this information separate from mUsers
* to avoid accidentally leak it.
*/
@GuardedBy("mUsersLock")
private final SparseArray<String> mUserAccounts = new SparseArray<>();
/**
* User restrictions set via UserManager. This doesn't include restrictions set by
* device owner / profile owners.
*
* DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user,
* a new {@link Bundle} should always be created and set. This is because a {@link Bundle}
* maybe shared between {@link #mBaseUserRestrictions} and
* {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately.
* (Otherwise we won't be able to detect what restrictions have changed in
* {@link #updateUserRestrictionsInternalLR}.
*/
@GuardedBy("mRestrictionsLock")
private final SparseArray<Bundle> mBaseUserRestrictions = new SparseArray<>();
/**
* Cached user restrictions that are in effect -- i.e. {@link #mBaseUserRestrictions} combined
* with device / profile owner restrictions. We'll initialize it lazily; use
* {@link #getEffectiveUserRestrictions} to access it.
*
* DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user,
* a new {@link Bundle} should always be created and set. This is because a {@link Bundle}
* maybe shared between {@link #mBaseUserRestrictions} and
* {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately.
* (Otherwise we won't be able to detect what restrictions have changed in
* {@link #updateUserRestrictionsInternalLR}.
*/
@GuardedBy("mRestrictionsLock")
private final SparseArray<Bundle> mCachedEffectiveUserRestrictions = new SparseArray<>();
/**
* User restrictions that have already been applied in
* {@link #updateUserRestrictionsInternalLR(Bundle, int)}. We use it to detect restrictions
* that have changed since the last
* {@link #updateUserRestrictionsInternalLR(Bundle, int)} call.
*/
@GuardedBy("mRestrictionsLock")
private final SparseArray<Bundle> mAppliedUserRestrictions = new SparseArray<>();
/**
* User restrictions set by {@link com.android.server.devicepolicy.DevicePolicyManagerService}
* that should be applied to all users, including guests.
*/
@GuardedBy("mRestrictionsLock")
private Bundle mDevicePolicyGlobalUserRestrictions;
/**
* User restrictions set by {@link com.android.server.devicepolicy.DevicePolicyManagerService}
* for each user.
*/
@GuardedBy("mRestrictionsLock")
private final SparseArray<Bundle> mDevicePolicyLocalUserRestrictions = new SparseArray<>();
@GuardedBy("mGuestRestrictions")
private final Bundle mGuestRestrictions = new Bundle();
/**
* Set of user IDs being actively removed. Removed IDs linger in this set
* for several seconds to work around a VFS caching issue.
*/
@GuardedBy("mUsersLock")
private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray();
@GuardedBy("mUsersLock")
private int[] mUserIds;
@GuardedBy("mPackagesLock")
private int mNextSerialNumber;
private int mUserVersion = 0;
private IAppOpsService mAppOpsService;
private final LocalService mLocalService;
@GuardedBy("mUsersLock")
private boolean mIsDeviceManaged;
@GuardedBy("mUsersLock")
private final SparseBooleanArray mIsUserManaged = new SparseBooleanArray();
@GuardedBy("mUserRestrictionsListeners")
private final ArrayList<UserRestrictionsListener> mUserRestrictionsListeners =
new ArrayList<>();
private static UserManagerService sInstance;
public static UserManagerService getInstance() {
synchronized (UserManagerService.class) {
return sInstance;
}
}
@VisibleForTesting
UserManagerService(File dataDir) {
this(null, null, new Object(), dataDir);
}
/**
* 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 packagesLock) {
this(context, pm, packagesLock, Environment.getDataDirectory());
}
private UserManagerService(Context context, PackageManagerService pm,
Object packagesLock, File dataDir) {
mContext = context;
mPm = pm;
mPackagesLock = packagesLock;
mHandler = new MainHandler();
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, String.valueOf(UserHandle.USER_SYSTEM));
userZeroDir.mkdirs();
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);
initDefaultGuestRestrictions();
readUserListLP();
sInstance = this;
}
mLocalService = new LocalService();
LocalServices.addService(UserManagerInternal.class, mLocalService);
}
void systemReady() {
// Prune out any partially created, partially removed and ephemeral users.
ArrayList<UserInfo> partials = new ArrayList<>();
synchronized (mUsersLock) {
final int userSize = mUsers.size();
for (int i = 0; i < userSize; i++) {
UserInfo ui = mUsers.valueAt(i);
if ((ui.partial || ui.guestToRemove || ui.isEphemeral()) && i != 0) {
partials.add(ui);
}
}
}
final int partialsSize = partials.size();
for (int i = 0; i < partialsSize; i++) {
UserInfo ui = partials.get(i);
Slog.w(LOG_TAG, "Removing partially created user " + ui.id
+ " (name=" + ui.name + ")");
removeUserState(ui.id);
}
onUserForeground(UserHandle.USER_SYSTEM);
mAppOpsService = IAppOpsService.Stub.asInterface(
ServiceManager.getService(Context.APP_OPS_SERVICE));
synchronized (mRestrictionsLock) {
applyUserRestrictionsLR(UserHandle.USER_SYSTEM);
}
}
@Override
public String getUserAccount(int userId) {
checkManageUserAndAcrossUsersFullPermission("get user account");
synchronized (mUsersLock) {
return mUserAccounts.get(userId);
}
}
@Override
public void setUserAccount(int userId, String accountName) {
checkManageUserAndAcrossUsersFullPermission("set user account");
UserInfo userToUpdate = null;
synchronized (mPackagesLock) {
synchronized (mUsersLock) {
String currentAccount = mUserAccounts.get(userId);
if (!Objects.equal(currentAccount, accountName)) {
mUserAccounts.put(userId, accountName);
userToUpdate = mUsers.get(userId);
}
}
if (userToUpdate != null) {
writeUserLP(userToUpdate);
}
}
}
@Override
public UserInfo getPrimaryUser() {
checkManageUsersPermission("query users");
synchronized (mUsersLock) {
final int userSize = mUsers.size();
for (int i = 0; i < userSize; i++) {
UserInfo ui = mUsers.valueAt(i);
if (ui.isPrimary() && !mRemovingUserIds.get(ui.id)) {
return ui;
}
}
}
return null;
}
@Override
public @NonNull List<UserInfo> getUsers(boolean excludeDying) {
checkManageUsersPermission("query users");
synchronized (mUsersLock) {
ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size());
final int userSize = mUsers.size();
for (int i = 0; i < userSize; i++) {
UserInfo ui = mUsers.valueAt(i);
if (ui.partial) {
continue;
}
if (!excludeDying || !mRemovingUserIds.get(ui.id)) {
users.add(ui);
}
}
return users;
}
}
@Override
public List<UserInfo> getProfiles(int userId, boolean enabledOnly) {
if (userId != UserHandle.getCallingUserId()) {
checkManageUsersPermission("getting profiles related to user " + userId);
}
final long ident = Binder.clearCallingIdentity();
try {
synchronized (mUsersLock) {
return getProfilesLU(userId, enabledOnly);
}
} finally {
Binder.restoreCallingIdentity(ident);
}
}
/** Assume permissions already checked and caller's identity cleared */
private List<UserInfo> getProfilesLU(int userId, boolean enabledOnly) {
UserInfo user = getUserInfoLU(userId);
ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size());
if (user == null) {
// Probably a dying user
return users;
}
final int userSize = mUsers.size();
for (int i = 0; i < userSize; i++) {
UserInfo profile = mUsers.valueAt(i);
if (!isProfileOf(user, profile)) {
continue;
}
if (enabledOnly && !profile.isEnabled()) {
continue;
}
if (mRemovingUserIds.get(profile.id)) {
continue;
}
users.add(profile);
}
return users;
}
@Override
public int getCredentialOwnerProfile(int userHandle) {
checkManageUsersPermission("get the credential owner");
if (!LockPatternUtils.isSeparateWorkChallengeEnabled()) {
synchronized (mUsersLock) {
UserInfo profileParent = getProfileParentLU(userHandle);
if (profileParent != null) {
return profileParent.id;
}
}
}
return userHandle;
}
@Override
public boolean isSameProfileGroup(int userId, int otherUserId) {
if (userId == otherUserId) return true;
checkManageUsersPermission("check if in the same profile group");
synchronized (mPackagesLock) {
return isSameProfileGroupLP(userId, otherUserId);
}
}
private boolean isSameProfileGroupLP(int userId, int otherUserId) {
synchronized (mUsersLock) {
UserInfo userInfo = getUserInfoLU(userId);
if (userInfo == null || userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) {
return false;
}
UserInfo otherUserInfo = getUserInfoLU(otherUserId);
if (otherUserInfo == null
|| otherUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) {
return false;
}
return userInfo.profileGroupId == otherUserInfo.profileGroupId;
}
}
@Override
public UserInfo getProfileParent(int userHandle) {
checkManageUsersPermission("get the profile parent");
synchronized (mUsersLock) {
return getProfileParentLU(userHandle);
}
}
private UserInfo getProfileParentLU(int userHandle) {
UserInfo profile = getUserInfoLU(userHandle);
if (profile == null) {
return null;
}
int parentUserId = profile.profileGroupId;
if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) {
return null;
} else {
return getUserInfoLU(parentUserId);
}
}
private static boolean isProfileOf(UserInfo user, UserInfo profile) {
return user.id == profile.id ||
(user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID
&& user.profileGroupId == profile.profileGroupId);
}
private void broadcastProfileAvailabilityChanges(UserHandle profileHandle,
UserHandle parentHandle, Bundle extras) {
// Send intent to profile
Intent intent = new Intent(Intent.ACTION_AVAILABILITY_CHANGED);
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
intent.putExtras(extras);
mContext.sendBroadcastAsUser(intent, profileHandle);
// Send intent to parent
if (parentHandle != null) {
intent = new Intent(Intent.ACTION_MANAGED_PROFILE_AVAILABILITY_CHANGED);
intent.putExtra(Intent.EXTRA_USER, profileHandle);
intent.putExtra(Intent.EXTRA_USER_HANDLE, profileHandle.getIdentifier());
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
intent.putExtras(extras);
mContext.sendBroadcastAsUser(intent, parentHandle);
}
}
@Override
public void setQuietModeEnabled(int userHandle, boolean enableQuietMode) {
checkManageUsersPermission("silence profile");
boolean changed = false;
UserInfo profile, parent;
synchronized (mPackagesLock) {
synchronized (mUsersLock) {
profile = getUserInfoLU(userHandle);
parent = getProfileParentLU(userHandle);
}
if (profile == null || !profile.isManagedProfile()) {
throw new IllegalArgumentException("User " + userHandle + " is not a profile");
}
if (profile.isQuietModeEnabled() != enableQuietMode) {
profile.flags ^= UserInfo.FLAG_QUIET_MODE;
writeUserLP(profile);
changed = true;
}
}
if (changed) {
Bundle extras = new Bundle();
extras.putBoolean(Intent.EXTRA_QUIET_MODE, enableQuietMode);
broadcastProfileAvailabilityChanges(profile.getUserHandle(),
parent != null ? parent.getUserHandle() : null, extras);
}
}
@Override
public boolean isQuietModeEnabled(int userHandle) {
synchronized (mPackagesLock) {
UserInfo info;
synchronized (mUsersLock) {
info = getUserInfoLU(userHandle);
}
if (info == null || !info.isManagedProfile()) {
throw new IllegalArgumentException("User " + userHandle + " is not a profile");
}
return info.isQuietModeEnabled();
}
}
@Override
public void setUserEnabled(int userId) {
checkManageUsersPermission("enable user");
synchronized (mPackagesLock) {
UserInfo info;
synchronized (mUsersLock) {
info = getUserInfoLU(userId);
}
if (info != null && !info.isEnabled()) {
info.flags ^= UserInfo.FLAG_DISABLED;
writeUserLP(info);
}
}
}
@Override
public UserInfo getUserInfo(int userId) {
checkManageUsersPermission("query user");
synchronized (mUsersLock) {
return getUserInfoLU(userId);
}
}
@Override
public boolean isRestricted() {
synchronized (mUsersLock) {
return getUserInfoLU(UserHandle.getCallingUserId()).isRestricted();
}
}
@Override
public boolean canHaveRestrictedProfile(int userId) {
checkManageUsersPermission("canHaveRestrictedProfile");
synchronized (mUsersLock) {
final UserInfo userInfo = getUserInfoLU(userId);
if (userInfo == null || !userInfo.canHaveProfile()) {
return false;
}
if (!userInfo.isAdmin()) {
return false;
}
// restricted profile can be created if there is no DO set and the admin user has no PO;
return !mIsDeviceManaged && !mIsUserManaged.get(userId);
}
}
/*
* Should be locked on mUsers before calling this.
*/
private UserInfo getUserInfoLU(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.get(userId)) {
Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId);
return null;
}
return ui;
}
/**
* Obtains {@link #mUsersLock} and return UserInfo from mUsers.
* <p>No permissions checking or any addition checks are made</p>
*/
private UserInfo getUserInfoNoChecks(int userId) {
synchronized (mUsersLock) {
return mUsers.get(userId);
}
}
/** Called by PackageManagerService */
public boolean exists(int userId) {
return getUserInfoNoChecks(userId) != null;
}
@Override
public void setUserName(int userId, String name) {
checkManageUsersPermission("rename users");
boolean changed = false;
synchronized (mPackagesLock) {
UserInfo info = getUserInfoNoChecks(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;
writeUserLP(info);
changed = true;
}
}
if (changed) {
sendUserInfoChangedBroadcast(userId);
}
}
@Override
public void setUserIcon(int userId, Bitmap bitmap) {
checkManageUsersPermission("update users");
long ident = Binder.clearCallingIdentity();
try {
synchronized (mPackagesLock) {
UserInfo info = getUserInfoNoChecks(userId);
if (info == null || info.partial) {
Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId);
return;
}
writeBitmapLP(info, bitmap);
writeUserLP(info);
}
sendUserInfoChangedBroadcast(userId);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
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, UserHandle.ALL);
}
@Override
public ParcelFileDescriptor getUserIcon(int userId) {
String iconPath;
synchronized (mPackagesLock) {
UserInfo info = getUserInfoNoChecks(userId);
if (info == null || info.partial) {
Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId);
return null;
}
int callingGroupId = getUserInfoNoChecks(UserHandle.getCallingUserId()).profileGroupId;
if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID
|| callingGroupId != info.profileGroupId) {
checkManageUsersPermission("get the icon of a user who is not related");
}
if (info.iconPath == null) {
return null;
}
iconPath = info.iconPath;
}
try {
return ParcelFileDescriptor.open(
new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY);
} catch (FileNotFoundException e) {
Log.e(LOG_TAG, "Couldn't find icon file", e);
}
return null;
}
public void makeInitialized(int userId) {
checkManageUsersPermission("makeInitialized");
boolean scheduleWriteUser = false;
UserInfo info;
synchronized (mUsersLock) {
info = mUsers.get(userId);
if (info == null || info.partial) {
Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId);
return;
}
if ((info.flags & UserInfo.FLAG_INITIALIZED) == 0) {
info.flags |= UserInfo.FLAG_INITIALIZED;
scheduleWriteUser = true;
}
}
if (scheduleWriteUser) {
scheduleWriteUser(info);
}
}
/**
* If default guest restrictions haven't been initialized yet, add the basic
* restrictions.
*/
private void initDefaultGuestRestrictions() {
synchronized (mGuestRestrictions) {
if (mGuestRestrictions.isEmpty()) {
mGuestRestrictions.putBoolean(UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES, true);
mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true);
mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true);
}
}
}
@Override
public Bundle getDefaultGuestRestrictions() {
checkManageUsersPermission("getDefaultGuestRestrictions");
synchronized (mGuestRestrictions) {
return new Bundle(mGuestRestrictions);
}
}
@Override
public void setDefaultGuestRestrictions(Bundle restrictions) {
checkManageUsersPermission("setDefaultGuestRestrictions");
synchronized (mGuestRestrictions) {
mGuestRestrictions.clear();
mGuestRestrictions.putAll(restrictions);
}
synchronized (mPackagesLock) {
writeUserListLP();
}
}
/**
* See {@link UserManagerInternal#setDevicePolicyUserRestrictions(int, Bundle, Bundle)}
*/
void setDevicePolicyUserRestrictions(int userId, @NonNull Bundle local,
@Nullable Bundle global) {
Preconditions.checkNotNull(local);
boolean globalChanged = false;
boolean localChanged;
synchronized (mRestrictionsLock) {
if (global != null) {
// Update global.
globalChanged = !UserRestrictionsUtils.areEqual(
mDevicePolicyGlobalUserRestrictions, global);
if (globalChanged) {
mDevicePolicyGlobalUserRestrictions = global;
}
}
{
// Update local.
final Bundle prev = mDevicePolicyLocalUserRestrictions.get(userId);
localChanged = !UserRestrictionsUtils.areEqual(prev, local);
if (localChanged) {
mDevicePolicyLocalUserRestrictions.put(userId, local);
}
}
}
if (DBG) {
Log.d(LOG_TAG, "setDevicePolicyUserRestrictions: userId=" + userId
+ " global=" + global + (globalChanged ? " (changed)" : "")
+ " local=" + local + (localChanged ? " (changed)" : "")
);
}
// Don't call them within the mRestrictionsLock.
synchronized (mPackagesLock) {
if (globalChanged) {
writeUserListLP();
}
if (localChanged) {
writeUserLP(getUserInfoNoChecks(userId));
}
}
synchronized (mRestrictionsLock) {
if (globalChanged) {
applyUserRestrictionsForAllUsersLR();
} else if (localChanged) {
applyUserRestrictionsLR(userId);
}
}
}
@GuardedBy("mRestrictionsLock")
private Bundle computeEffectiveUserRestrictionsLR(int userId) {
final Bundle baseRestrictions =
UserRestrictionsUtils.nonNull(mBaseUserRestrictions.get(userId));
final Bundle global = mDevicePolicyGlobalUserRestrictions;
final Bundle local = mDevicePolicyLocalUserRestrictions.get(userId);
if (UserRestrictionsUtils.isEmpty(global) && UserRestrictionsUtils.isEmpty(local)) {
// Common case first.
return baseRestrictions;
}
final Bundle effective = UserRestrictionsUtils.clone(baseRestrictions);
UserRestrictionsUtils.merge(effective, global);
UserRestrictionsUtils.merge(effective, local);
return effective;
}
@GuardedBy("mRestrictionsLock")
private void invalidateEffectiveUserRestrictionsLR(int userId) {
if (DBG) {
Log.d(LOG_TAG, "invalidateEffectiveUserRestrictions userId=" + userId);
}
mCachedEffectiveUserRestrictions.remove(userId);
}
private Bundle getEffectiveUserRestrictions(int userId) {
synchronized (mRestrictionsLock) {
Bundle restrictions = mCachedEffectiveUserRestrictions.get(userId);
if (restrictions == null) {
restrictions = computeEffectiveUserRestrictionsLR(userId);
mCachedEffectiveUserRestrictions.put(userId, restrictions);
}
return restrictions;
}
}
/** @return a specific user restriction that's in effect currently. */
@Override
public boolean hasUserRestriction(String restrictionKey, int userId) {
Bundle restrictions = getEffectiveUserRestrictions(userId);
return restrictions != null && restrictions.getBoolean(restrictionKey);
}
/**
* @return UserRestrictions that are in effect currently. This always returns a new
* {@link Bundle}.
*/
@Override
public Bundle getUserRestrictions(int userId) {
return UserRestrictionsUtils.clone(getEffectiveUserRestrictions(userId));
}
@Override
public boolean hasBaseUserRestriction(String restrictionKey, int userId) {
checkManageUsersPermission("hasBaseUserRestriction");
synchronized (mRestrictionsLock) {
Bundle bundle = mBaseUserRestrictions.get(userId);
return (bundle != null && bundle.getBoolean(restrictionKey, false));
}
}
@Override
public void setUserRestriction(String key, boolean value, int userId) {
checkManageUsersPermission("setUserRestriction");
synchronized (mRestrictionsLock) {
// Note we can't modify Bundles stored in mBaseUserRestrictions directly, so create
// a copy.
final Bundle newRestrictions = UserRestrictionsUtils.clone(
mBaseUserRestrictions.get(userId));
newRestrictions.putBoolean(key, value);
updateUserRestrictionsInternalLR(newRestrictions, userId);
}
}
/**
* Optionally updating user restrictions, calculate the effective user restrictions and also
* propagate to other services and system settings.
*
* @param newRestrictions User restrictions to set.
* If null, will not update user restrictions and only does the propagation.
* @param userId target user ID.
*/
@GuardedBy("mRestrictionsLock")
private void updateUserRestrictionsInternalLR(
@Nullable Bundle newRestrictions, int userId) {
final Bundle prevAppliedRestrictions = UserRestrictionsUtils.nonNull(
mAppliedUserRestrictions.get(userId));
// Update base restrictions.
if (newRestrictions != null) {
// If newRestrictions == the current one, it's probably a bug.
final Bundle prevBaseRestrictions = mBaseUserRestrictions.get(userId);
Preconditions.checkState(prevBaseRestrictions != newRestrictions);
Preconditions.checkState(mCachedEffectiveUserRestrictions.get(userId)
!= newRestrictions);
if (!UserRestrictionsUtils.areEqual(prevBaseRestrictions, newRestrictions)) {
mBaseUserRestrictions.put(userId, newRestrictions);
scheduleWriteUser(getUserInfoNoChecks(userId));
}
}
final Bundle effective = computeEffectiveUserRestrictionsLR(userId);
mCachedEffectiveUserRestrictions.put(userId, effective);
// Apply the new restrictions.
if (DBG) {
debug("Applying user restrictions: userId=" + userId
+ " new=" + effective + " prev=" + prevAppliedRestrictions);
}
if (mAppOpsService != null) { // We skip it until system-ready.
final long token = Binder.clearCallingIdentity();
try {
mAppOpsService.setUserRestrictions(effective, userId);
} catch (RemoteException e) {
Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions");
} finally {
Binder.restoreCallingIdentity(token);
}
}
propagateUserRestrictionsLR(userId, effective, prevAppliedRestrictions);
mAppliedUserRestrictions.put(userId, new Bundle(effective));
}
private void propagateUserRestrictionsLR(final int userId,
Bundle newRestrictions, Bundle prevRestrictions) {
// Note this method doesn't touch any state, meaning it doesn't require mRestrictionsLock
// actually, but we still need some kind of synchronization otherwise we might end up
// calling listeners out-of-order, thus "LR".
if (UserRestrictionsUtils.areEqual(newRestrictions, prevRestrictions)) {
return;
}
final Bundle newRestrictionsFinal = new Bundle(newRestrictions);
final Bundle prevRestrictionsFinal = new Bundle(prevRestrictions);
mHandler.post(new Runnable() {
@Override
public void run() {
UserRestrictionsUtils.applyUserRestrictions(
mContext, userId, newRestrictionsFinal, prevRestrictionsFinal);
final UserRestrictionsListener[] listeners;
synchronized (mUserRestrictionsListeners) {
listeners = new UserRestrictionsListener[mUserRestrictionsListeners.size()];
mUserRestrictionsListeners.toArray(listeners);
}
for (int i = 0; i < listeners.length; i++) {
listeners[i].onUserRestrictionsChanged(userId,
newRestrictionsFinal, prevRestrictionsFinal);
}
}
});
}
// Package private for the inner class.
void applyUserRestrictionsLR(int userId) {
updateUserRestrictionsInternalLR(null, userId);
}
@GuardedBy("mRestrictionsLock")
// Package private for the inner class.
void applyUserRestrictionsForAllUsersLR() {
if (DBG) {
debug("applyUserRestrictionsForAllUsersLR");
}
// First, invalidate all cached values.
mCachedEffectiveUserRestrictions.clear();
// We don't want to call into ActivityManagerNative while taking a lock, so we'll call
// it on a handler.
final Runnable r = new Runnable() {
@Override
public void run() {
// Then get the list of running users.
final int[] runningUsers;
try {
runningUsers = ActivityManagerNative.getDefault().getRunningUserIds();
} catch (RemoteException e) {
Log.w(LOG_TAG, "Unable to access ActivityManagerNative");
return;
}
// Then re-calculate the effective restrictions and apply, only for running users.
// It's okay if a new user has started after the getRunningUserIds() call,
// because we'll do the same thing (re-calculate the restrictions and apply)
// when we start a user.
synchronized (mRestrictionsLock) {
for (int i = 0; i < runningUsers.length; i++) {
applyUserRestrictionsLR(runningUsers[i]);
}
}
}
};
mHandler.post(r);
}
/**
* Check if we've hit the limit of how many users can be created.
*/
private boolean isUserLimitReached() {
int count;
synchronized (mUsersLock) {
count = getAliveUsersExcludingGuestsCountLU();
}
return count >= UserManager.getMaxSupportedUsers();
}
@Override
public boolean canAddMoreManagedProfiles(int userId, boolean allowedToRemoveOne) {
checkManageUsersPermission("check if more managed profiles can be added.");
if (ActivityManager.isLowRamDeviceStatic()) {
return false;
}
if (!mContext.getPackageManager().hasSystemFeature(
PackageManager.FEATURE_MANAGED_USERS)) {
return false;
}
// Limit number of managed profiles that can be created
final int managedProfilesCount = getProfiles(userId, true).size() - 1;
final int profilesRemovedCount = managedProfilesCount > 0 && allowedToRemoveOne ? 1 : 0;
if (managedProfilesCount - profilesRemovedCount >= MAX_MANAGED_PROFILES) {
return false;
}
synchronized(mUsersLock) {
UserInfo userInfo = getUserInfoLU(userId);
if (!userInfo.canHaveProfile()) {
return false;
}
int usersCountAfterRemoving = getAliveUsersExcludingGuestsCountLU()
- profilesRemovedCount;
// We allow creating a managed profile in the special case where there is only one user.
return usersCountAfterRemoving == 1
|| usersCountAfterRemoving < UserManager.getMaxSupportedUsers();
}
}
private int getAliveUsersExcludingGuestsCountLU() {
int aliveUserCount = 0;
final int totalUserCount = mUsers.size();
// Skip over users being removed
for (int i = 0; i < totalUserCount; i++) {
UserInfo user = mUsers.valueAt(i);
if (!mRemovingUserIds.get(user.id)
&& !user.isGuest() && !user.partial) {
aliveUserCount++;
}
}
return aliveUserCount;
}
/**
* Enforces that only the system UID or root's UID or apps that have the
* {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} and
* {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL INTERACT_ACROSS_USERS_FULL}
* permissions can make certain calls to the UserManager.
*
* @param message used as message if SecurityException is thrown
* @throws SecurityException if the caller does not have enough privilege.
*/
private static final void checkManageUserAndAcrossUsersFullPermission(String message) {
final int uid = Binder.getCallingUid();
if (uid != Process.SYSTEM_UID && uid != 0
&& ActivityManager.checkComponentPermission(
Manifest.permission.MANAGE_USERS,
uid, -1, true) != PackageManager.PERMISSION_GRANTED
&& ActivityManager.checkComponentPermission(
Manifest.permission.INTERACT_ACROSS_USERS_FULL,
uid, -1, true) != PackageManager.PERMISSION_GRANTED) {
throw new SecurityException(
"You need MANAGE_USERS and INTERACT_ACROSS_USERS_FULL permission to: "
+ message);
}
}
/**
* 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 (!UserHandle.isSameApp(uid, Process.SYSTEM_UID) && uid != Process.ROOT_UID
&& ActivityManager.checkComponentPermission(
android.Manifest.permission.MANAGE_USERS,
uid, -1, true) != PackageManager.PERMISSION_GRANTED) {
throw new SecurityException("You need MANAGE_USERS permission to: " + message);
}
}
/**
* Enforces that only the system UID or root's UID (on any user) 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 void checkSystemOrRoot(String message) {
final int uid = Binder.getCallingUid();
if (!UserHandle.isSameApp(uid, Process.SYSTEM_UID) && uid != Process.ROOT_UID) {
throw new SecurityException("Only system may: " + message);
}
}
private void writeBitmapLP(UserInfo info, Bitmap bitmap) {
try {
File dir = new File(mUsersDir, Integer.toString(info.id));
File file = new File(dir, USER_PHOTO_FILENAME);
File tmp = new File(dir, USER_PHOTO_FILENAME_TMP);
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(tmp))
&& tmp.renameTo(file)) {
info.iconPath = file.getAbsolutePath();
}
try {
os.close();
} catch (IOException ioe) {
// What the ... !
}
tmp.delete();
} 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 (mUsersLock) {
return mUserIds;
}
}
private void readUserListLP() {
if (!mUserListFile.exists()) {
fallbackToSingleUserLP();
return;
}
FileInputStream fis = null;
AtomicFile userListFile = new AtomicFile(mUserListFile);
try {
fis = userListFile.openRead();
XmlPullParser parser = Xml.newPullParser();
parser.setInput(fis, StandardCharsets.UTF_8.name());
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");
fallbackToSingleUserLP();
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);
}
}
final Bundle newDevicePolicyGlobalUserRestrictions = new Bundle();
while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) {
if (type == XmlPullParser.START_TAG) {
final String name = parser.getName();
if (name.equals(TAG_USER)) {
String id = parser.getAttributeValue(null, ATTR_ID);
Pair<UserInfo, String> userPair = readUserLP(Integer.parseInt(id));
if (userPair != null) {
UserInfo user = userPair.first;
String account = userPair.second;
synchronized (mUsersLock) {
mUsers.put(user.id, user);
mUserAccounts.put(user.id, account);
if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) {
mNextSerialNumber = user.id + 1;
}
}
}
} else if (name.equals(TAG_GUEST_RESTRICTIONS)) {
while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
&& type != XmlPullParser.END_TAG) {
if (type == XmlPullParser.START_TAG) {
if (parser.getName().equals(TAG_RESTRICTIONS)) {
synchronized (mGuestRestrictions) {
UserRestrictionsUtils
.readRestrictions(parser, mGuestRestrictions);
}
} else if (parser.getName().equals(TAG_DEVICE_POLICY_RESTRICTIONS)
) {
UserRestrictionsUtils.readRestrictions(parser,
newDevicePolicyGlobalUserRestrictions);
}
break;
}
}
}
}
}
synchronized (mRestrictionsLock) {
mDevicePolicyGlobalUserRestrictions = newDevicePolicyGlobalUserRestrictions;
}
updateUserIds();
upgradeIfNecessaryLP();
} catch (IOException | XmlPullParserException e) {
fallbackToSingleUserLP();
} finally {
IoUtils.closeQuietly(fis);
}
}
/**
* Upgrade steps between versions, either for fixing bugs or changing the data format.
*/
private void upgradeIfNecessaryLP() {
final int originalVersion = mUserVersion;
int userVersion = mUserVersion;
if (userVersion < 1) {
// Assign a proper name for the owner, if not initialized correctly before
UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM);
if ("Primary".equals(user.name)) {
user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name);
scheduleWriteUser(user);
}
userVersion = 1;
}
if (userVersion < 2) {
// Owner should be marked as initialized
UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM);
if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) {
user.flags |= UserInfo.FLAG_INITIALIZED;
scheduleWriteUser(user);
}
userVersion = 2;
}
if (userVersion < 4) {
userVersion = 4;
}
if (userVersion < 5) {
initDefaultGuestRestrictions();
userVersion = 5;
}
if (userVersion < 6) {
final boolean splitSystemUser = UserManager.isSplitSystemUser();
synchronized (mUsersLock) {
for (int i = 0; i < mUsers.size(); i++) {
UserInfo user = mUsers.valueAt(i);
// In non-split mode, only user 0 can have restricted profiles
if (!splitSystemUser && user.isRestricted()
&& (user.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID)) {
user.restrictedProfileParentId = UserHandle.USER_SYSTEM;
scheduleWriteUser(user);
}
}
}
userVersion = 6;
}
if (userVersion < USER_VERSION) {
Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to "
+ USER_VERSION);
} else {
mUserVersion = userVersion;
if (originalVersion < mUserVersion) {
writeUserListLP();
}
}
}
private void fallbackToSingleUserLP() {
int flags = UserInfo.FLAG_INITIALIZED;
// In split system user mode, the admin and primary flags are assigned to the first human
// user.
if (!UserManager.isSplitSystemUser()) {
flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY;
}
// Create the system user
UserInfo system = new UserInfo(UserHandle.USER_SYSTEM,
mContext.getResources().getString(com.android.internal.R.string.owner_name), null,
flags);
synchronized (mUsersLock) {
mUsers.put(system.id, system);
}
mNextSerialNumber = MIN_USER_ID;
mUserVersion = USER_VERSION;
Bundle restrictions = new Bundle();
synchronized (mRestrictionsLock) {
mBaseUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions);
}
updateUserIds();
initDefaultGuestRestrictions();
writeUserListLP();
writeUserLP(system);
}
private void scheduleWriteUser(UserInfo userInfo) {
if (DBG) {
debug("scheduleWriteUser");
}
// No need to wrap it within a lock -- worst case, we'll just post the same message
// twice.
if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) {
Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo);
mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY);
}
}
/*
* Writes the user file in this format:
*
* <user flags="20039023" id="0">
* <name>Primary</name>
* </user>
*/
private void writeUserLP(UserInfo userInfo) {
if (DBG) {
debug("writeUserLP " + userInfo);
}
FileOutputStream fos = null;
AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX));
try {
fos = userFile.startWrite();
final BufferedOutputStream bos = new BufferedOutputStream(fos);
// XmlSerializer serializer = XmlUtils.serializerInstance();
final XmlSerializer serializer = new FastXmlSerializer();
serializer.setOutput(bos, StandardCharsets.UTF_8.name());
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");
}
if (userInfo.guestToRemove) {
serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true");
}
if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) {
serializer.attribute(null, ATTR_PROFILE_GROUP_ID,
Integer.toString(userInfo.profileGroupId));
}
if (userInfo.restrictedProfileParentId != UserInfo.NO_PROFILE_GROUP_ID) {
serializer.attribute(null, ATTR_RESTRICTED_PROFILE_PARENT_ID,
Integer.toString(userInfo.restrictedProfileParentId));
}
serializer.startTag(null, TAG_NAME);
serializer.text(userInfo.name);
serializer.endTag(null, TAG_NAME);
synchronized (mRestrictionsLock) {
UserRestrictionsUtils.writeRestrictions(serializer,
mBaseUserRestrictions.get(userInfo.id), TAG_RESTRICTIONS);
UserRestrictionsUtils.writeRestrictions(serializer,
mDevicePolicyLocalUserRestrictions.get(userInfo.id),
TAG_DEVICE_POLICY_RESTRICTIONS);
}
// Update the account field if it is set.
String account;
synchronized (mUsersLock) {
account = mUserAccounts.get(userInfo.id);
}
if (account != null) {
serializer.startTag(null, TAG_ACCOUNT);
serializer.text(account);
serializer.endTag(null, TAG_ACCOUNT);
}
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 writeUserListLP() {
if (DBG) {
debug("writeUserList");
}
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, StandardCharsets.UTF_8.name());
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));
serializer.startTag(null, TAG_GUEST_RESTRICTIONS);
synchronized (mGuestRestrictions) {
UserRestrictionsUtils
.writeRestrictions(serializer, mGuestRestrictions, TAG_RESTRICTIONS);
}
serializer.endTag(null, TAG_GUEST_RESTRICTIONS);
synchronized (mRestrictionsLock) {
UserRestrictionsUtils.writeRestrictions(serializer,
mDevicePolicyGlobalUserRestrictions, TAG_DEVICE_POLICY_RESTRICTIONS);
}
int[] userIdsToWrite;
synchronized (mUsersLock) {
userIdsToWrite = new int[mUsers.size()];
for (int i = 0; i < userIdsToWrite.length; i++) {
UserInfo user = mUsers.valueAt(i);
userIdsToWrite[i] = user.id;
}
}
for (int id : userIdsToWrite) {
serializer.startTag(null, TAG_USER);
serializer.attribute(null, ATTR_ID, Integer.toString(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 Pair<UserInfo, String> readUserLP(int id) {
int flags = 0;
int serialNumber = id;
String name = null;
String account = null;
String iconPath = null;
long creationTime = 0L;
long lastLoggedInTime = 0L;
int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID;
int restrictedProfileParentId = UserInfo.NO_PROFILE_GROUP_ID;
boolean partial = false;
boolean guestToRemove = false;
Bundle baseRestrictions = new Bundle();
Bundle localRestrictions = new Bundle();
FileInputStream fis = null;
try {
AtomicFile userFile =
new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX));
fis = userFile.openRead();
XmlPullParser parser = Xml.newPullParser();
parser.setInput(fis, StandardCharsets.UTF_8.name());
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);
profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID,
UserInfo.NO_PROFILE_GROUP_ID);
restrictedProfileParentId = readIntAttribute(parser,
ATTR_RESTRICTED_PROFILE_PARENT_ID, UserInfo.NO_PROFILE_GROUP_ID);
String valueString = parser.getAttributeValue(null, ATTR_PARTIAL);
if ("true".equals(valueString)) {
partial = true;
}
valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE);
if ("true".equals(valueString)) {
guestToRemove = true;
}
int outerDepth = parser.getDepth();
while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
&& (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
continue;
}
String tag = parser.getName();
if (TAG_NAME.equals(tag)) {
type = parser.next();
if (type == XmlPullParser.TEXT) {
name = parser.getText();
}
} else if (TAG_RESTRICTIONS.equals(tag)) {
UserRestrictionsUtils.readRestrictions(parser, baseRestrictions);
} else if (TAG_DEVICE_POLICY_RESTRICTIONS.equals(tag)) {
UserRestrictionsUtils.readRestrictions(parser, localRestrictions);
} else if (TAG_ACCOUNT.equals(tag)) {
type = parser.next();
if (type == XmlPullParser.TEXT) {
account = parser.getText();
}
}
}
}
UserInfo userInfo = new UserInfo(id, name, iconPath, flags);
userInfo.serialNumber = serialNumber;
userInfo.creationTime = creationTime;
userInfo.lastLoggedInTime = lastLoggedInTime;
userInfo.partial = partial;
userInfo.guestToRemove = guestToRemove;
userInfo.profileGroupId = profileGroupId;
userInfo.restrictedProfileParentId = restrictedProfileParentId;
synchronized (mRestrictionsLock) {
mBaseUserRestrictions.put(id, baseRestrictions);
mDevicePolicyLocalUserRestrictions.put(id, localRestrictions);
}
return new Pair<>(userInfo, account);
} 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;
}
}
private boolean isPackageInstalled(String pkg, int userId) {
final ApplicationInfo info = mPm.getApplicationInfo(pkg,
PackageManager.GET_UNINSTALLED_PACKAGES,
userId);
if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) {
return false;
}
return true;
}
/**
* Removes all the restrictions files (res_<packagename>) for a given user.
* Does not do any permissions checking.
*/
private void cleanAppRestrictions(int userId) {
synchronized (mPackagesLock) {
File dir = Environment.getUserSystemDirectory(userId);
String[] files = dir.list();
if (files == null) return;
for (String fileName : files) {
if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) {
File resFile = new File(dir, fileName);
if (resFile.exists()) {
resFile.delete();
}
}
}
}
}
/**
* Removes the app restrictions file for a specific package and user id, if it exists.
*/
private void cleanAppRestrictionsForPackage(String pkg, int userId) {
synchronized (mPackagesLock) {
File dir = Environment.getUserSystemDirectory(userId);
File resFile = new File(dir, packageToRestrictionsFileName(pkg));
if (resFile.exists()) {
resFile.delete();
}
}
}
@Override
public UserInfo createProfileForUser(String name, int flags, int userId) {
checkManageUsersPermission("Only the system can create users");
return createUserInternal(name, flags, userId);
}
@Override
public UserInfo createUser(String name, int flags) {
checkManageUsersPermission("Only the system can create users");
return createUserInternal(name, flags, UserHandle.USER_NULL);
}
private UserInfo createUserInternal(String name, int flags, int parentId) {
if (hasUserRestriction(UserManager.DISALLOW_ADD_USER, UserHandle.getCallingUserId())) {
Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled.");
return null;
}
if (ActivityManager.isLowRamDeviceStatic()) {
return null;
}
final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0;
final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0;
final boolean isRestricted = (flags & UserInfo.FLAG_RESTRICTED) != 0;
final long ident = Binder.clearCallingIdentity();
UserInfo userInfo;
final int userId;
try {
synchronized (mPackagesLock) {
UserInfo parent = null;
if (parentId != UserHandle.USER_NULL) {
synchronized (mUsersLock) {
parent = getUserInfoLU(parentId);
}
if (parent == null) return null;
}
if (isManagedProfile && !canAddMoreManagedProfiles(parentId, false)) {
Log.e(LOG_TAG, "Cannot add more managed profiles for user " + parentId);
return null;
}
if (!isGuest && !isManagedProfile && isUserLimitReached()) {
// If we're not adding a guest user or a managed profile and the limit has
// been reached, cannot add a user.
return null;
}
// If we're adding a guest and there already exists one, bail.
if (isGuest && findCurrentGuestUser() != null) {
return null;
}
// In legacy mode, restricted profile's parent can only be the owner user
if (isRestricted && !UserManager.isSplitSystemUser()
&& (parentId != UserHandle.USER_SYSTEM)) {
Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner");
return null;
}
if (isRestricted && UserManager.isSplitSystemUser()) {
if (parent == null) {
Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be "
+ "specified");
return null;
}
if (!parent.canHaveProfile()) {
Log.w(LOG_TAG, "Cannot add restricted profile - profiles cannot be "
+ "created for the specified parent user id " + parentId);
return null;
}
}
// In split system user mode, we assign the first human user the primary flag.
// And if there is no device owner, we also assign the admin flag to primary user.
if (UserManager.isSplitSystemUser()
&& !isGuest && !isManagedProfile && getPrimaryUser() == null) {
flags |= UserInfo.FLAG_PRIMARY;
synchronized (mUsersLock) {
if (!mIsDeviceManaged) {
flags |= UserInfo.FLAG_ADMIN;
}
}
}
if (parent != null && parent.isEphemeral()) {
flags |= UserInfo.FLAG_EPHEMERAL;
}
userId = getNextAvailableId();
userInfo = new UserInfo(userId, name, null, flags);
userInfo.serialNumber = mNextSerialNumber++;
long now = System.currentTimeMillis();
userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0;
userInfo.partial = true;
Environment.getUserSystemDirectory(userInfo.id).mkdirs();
synchronized (mUsersLock) {
mUsers.put(userId, userInfo);
}
writeUserListLP();
if (parent != null) {
if (isManagedProfile) {
if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) {
parent.profileGroupId = parent.id;
writeUserLP(parent);
}
userInfo.profileGroupId = parent.profileGroupId;
} else if (isRestricted) {
if (parent.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID) {
parent.restrictedProfileParentId = parent.id;
writeUserLP(parent);
}
userInfo.restrictedProfileParentId = parent.restrictedProfileParentId;
}
}
}
final StorageManager storage = mContext.getSystemService(StorageManager.class);
storage.createUserKey(userId, userInfo.serialNumber, userInfo.isEphemeral());
for (VolumeInfo vol : storage.getWritablePrivateVolumes()) {
final String volumeUuid = vol.getFsUuid();
try {
final File userDir = Environment.getDataUserDirectory(volumeUuid, userId);
storage.prepareUserStorage(
volumeUuid, userId, userInfo.serialNumber, userInfo.isEphemeral());
enforceSerialNumber(userDir, userInfo.serialNumber);
} catch (IOException e) {
Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e);
}
}
mPm.createNewUser(userId);
userInfo.partial = false;
synchronized (mPackagesLock) {
writeUserLP(userInfo);
}
updateUserIds();
Bundle restrictions = new Bundle();
if (isGuest) {
synchronized (mGuestRestrictions) {
restrictions.putAll(mGuestRestrictions);
}
}
synchronized (mRestrictionsLock) {
mBaseUserRestrictions.append(userId, restrictions);
}
mPm.newUserCreated(userId);
Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED);
addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId);
mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL,
android.Manifest.permission.MANAGE_USERS);
MetricsLogger.count(mContext, isGuest ? TRON_GUEST_CREATED : TRON_USER_CREATED, 1);
} finally {
Binder.restoreCallingIdentity(ident);
}
return userInfo;
}
/**
* @hide
*/
public UserInfo createRestrictedProfile(String name, int parentUserId) {
checkManageUsersPermission("setupRestrictedProfile");
final UserInfo user = createProfileForUser(name, UserInfo.FLAG_RESTRICTED, parentUserId);
if (user == null) {
return null;
}
setUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS, true, user.id);
// Change the setting before applying the DISALLOW_SHARE_LOCATION restriction, otherwise
// the putIntForUser() will fail.
android.provider.Settings.Secure.putIntForUser(mContext.getContentResolver(),
android.provider.Settings.Secure.LOCATION_MODE,
android.provider.Settings.Secure.LOCATION_MODE_OFF, user.id);
setUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, true, user.id);
return user;
}
/**
* Find the current guest user. If the Guest user is partial,
* then do not include it in the results as it is about to die.
*/
private UserInfo findCurrentGuestUser() {
synchronized (mUsersLock) {
final int size = mUsers.size();
for (int i = 0; i < size; i++) {
final UserInfo user = mUsers.valueAt(i);
if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) {
return user;
}
}
}
return null;
}
/**
* Mark this guest user for deletion to allow us to create another guest
* and switch to that user before actually removing this guest.
* @param userHandle the userid of the current guest
* @return whether the user could be marked for deletion
*/
public boolean markGuestForDeletion(int userHandle) {
checkManageUsersPermission("Only the system can remove users");
if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean(
UserManager.DISALLOW_REMOVE_USER, false)) {
Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled.");
return false;
}
long ident = Binder.clearCallingIdentity();
try {
final UserInfo user;
synchronized (mPackagesLock) {
synchronized (mUsersLock) {
user = mUsers.get(userHandle);
if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) {
return false;
}
}
if (!user.isGuest()) {
return false;
}
// We set this to a guest user that is to be removed. This is a temporary state
// where we are allowed to add new Guest users, even if this one is still not
// removed. This user will still show up in getUserInfo() calls.
// If we don't get around to removing this Guest user, it will be purged on next
// startup.
user.guestToRemove = true;
// Mark it as disabled, so that it isn't returned any more when
// profiles are queried.
user.flags |= UserInfo.FLAG_DISABLED;
writeUserLP(user);
}
} finally {
Binder.restoreCallingIdentity(ident);
}
return true;
}
/**
* 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 userHandle the user's id
*/
public boolean removeUser(int userHandle) {
checkManageUsersPermission("Only the system can remove users");
if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean(
UserManager.DISALLOW_REMOVE_USER, false)) {
Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled.");
return false;
}
long ident = Binder.clearCallingIdentity();
try {
final UserInfo user;
int currentUser = ActivityManager.getCurrentUser();
if (currentUser == userHandle) {
Log.w(LOG_TAG, "Current user cannot be removed");
return false;
}
synchronized (mPackagesLock) {
synchronized (mUsersLock) {
user = mUsers.get(userHandle);
if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) {
return false;
}
// We remember deleted user IDs to prevent them from being
// reused during the current boot; they can still be reused
// after a reboot.
mRemovingUserIds.put(userHandle, true);
}
try {
mAppOpsService.removeUser(userHandle);
} catch (RemoteException e) {
Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e);
}
// 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;
// Mark it as disabled, so that it isn't returned any more when
// profiles are queried.
user.flags |= UserInfo.FLAG_DISABLED;
writeUserLP(user);
}
if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID
&& user.isManagedProfile()) {
// Send broadcast to notify system that the user removed was a
// managed user.
sendProfileRemovedBroadcast(user.profileGroupId, user.id);
}
if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle);
int res;
try {
res = ActivityManagerNative.getDefault().stopUser(userHandle, /* force= */ true,
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;
} finally {
Binder.restoreCallingIdentity(ident);
}
}
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() {
// Clean up any ActivityManager state
LocalServices.getService(ActivityManagerInternal.class)
.onUserRemoved(userHandle);
removeUserState(userHandle);
}
}.start();
}
},
null, Activity.RESULT_OK, null, null);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
private void removeUserState(final int userHandle) {
mContext.getSystemService(StorageManager.class).destroyUserKey(userHandle);
// Cleanup package manager settings
mPm.cleanUpUser(this, userHandle);
// Remove this user from the list
synchronized (mUsersLock) {
mUsers.remove(userHandle);
mUserAccounts.delete(userHandle);
mIsUserManaged.delete(userHandle);
}
synchronized (mRestrictionsLock) {
mBaseUserRestrictions.remove(userHandle);
mAppliedUserRestrictions.remove(userHandle);
mCachedEffectiveUserRestrictions.remove(userHandle);
mDevicePolicyLocalUserRestrictions.remove(userHandle);
}
// Remove user file
AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX));
userFile.delete();
// Update the user list
synchronized (mPackagesLock) {
writeUserListLP();
}
updateUserIds();
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();
}
private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) {
Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED);
managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY |
Intent.FLAG_RECEIVER_FOREGROUND);
managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId));
managedProfileIntent.putExtra(Intent.EXTRA_USER_HANDLE, removedUserId);
mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null);
}
@Override
public Bundle getApplicationRestrictions(String packageName) {
return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId());
}
@Override
public Bundle getApplicationRestrictionsForUser(String packageName, int userId) {
if (UserHandle.getCallingUserId() != userId
|| !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) {
checkSystemOrRoot("get application restrictions for other users/apps");
}
synchronized (mPackagesLock) {
// Read the restrictions from XML
return readApplicationRestrictionsLP(packageName, userId);
}
}
@Override
public void setApplicationRestrictions(String packageName, Bundle restrictions,
int userId) {
checkSystemOrRoot("set application restrictions");
synchronized (mPackagesLock) {
if (restrictions == null || restrictions.isEmpty()) {
cleanAppRestrictionsForPackage(packageName, userId);
} else {
// Write the restrictions to XML
writeApplicationRestrictionsLP(packageName, restrictions, userId);
}
}
if (isPackageInstalled(packageName, userId)) {
// Notify package of changes via an intent - only sent to explicitly registered receivers.
Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED);
changeIntent.setPackage(packageName);
changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId));
}
}
private void unhideAllInstalledAppsForUser(final int userHandle) {
mHandler.post(new Runnable() {
@Override
public void run() {
List<ApplicationInfo> apps =
mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES,
userHandle).getList();
final long ident = Binder.clearCallingIdentity();
try {
for (ApplicationInfo appInfo : apps) {
if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0
&& (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN)
!= 0) {
mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false,
userHandle);
}
}
} finally {
Binder.restoreCallingIdentity(ident);
}
}
});
}
private int getUidForPackage(String packageName) {
long ident = Binder.clearCallingIdentity();
try {
return mContext.getPackageManager().getApplicationInfo(packageName,
PackageManager.GET_UNINSTALLED_PACKAGES).uid;
} catch (NameNotFoundException nnfe) {
return -1;
} finally {
Binder.restoreCallingIdentity(ident);
}
}
private Bundle readApplicationRestrictionsLP(String packageName, int userId) {
AtomicFile restrictionsFile =
new AtomicFile(new File(Environment.getUserSystemDirectory(userId),
packageToRestrictionsFileName(packageName)));
return readApplicationRestrictionsLP(restrictionsFile);
}
@VisibleForTesting
static Bundle readApplicationRestrictionsLP(AtomicFile restrictionsFile) {
final Bundle restrictions = new Bundle();
final ArrayList<String> values = new ArrayList<>();
if (!restrictionsFile.getBaseFile().exists()) {
return restrictions;
}
FileInputStream fis = null;
try {
fis = restrictionsFile.openRead();
XmlPullParser parser = Xml.newPullParser();
parser.setInput(fis, StandardCharsets.UTF_8.name());
XmlUtils.nextElement(parser);
if (parser.getEventType() != XmlPullParser.START_TAG) {
Slog.e(LOG_TAG, "Unable to read restrictions file "
+ restrictionsFile.getBaseFile());
return restrictions;
}
while (parser.next() != XmlPullParser.END_DOCUMENT) {
readEntry(restrictions, values, parser);
}
} catch (IOException|XmlPullParserException e) {
Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e);
} finally {
IoUtils.closeQuietly(fis);
}
return restrictions;
}
private static void readEntry(Bundle restrictions, ArrayList<String> values,
XmlPullParser parser) throws XmlPullParserException, IOException {
int type = parser.getEventType();
if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) {
String key = parser.getAttributeValue(null, ATTR_KEY);
String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE);
String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE);
if (multiple != null) {
values.clear();
int count = Integer.parseInt(multiple);
while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) {
if (type == XmlPullParser.START_TAG
&& parser.getName().equals(TAG_VALUE)) {
values.add(parser.nextText().trim());
count--;
}
}
String [] valueStrings = new String[values.size()];
values.toArray(valueStrings);
restrictions.putStringArray(key, valueStrings);
} else if (ATTR_TYPE_BUNDLE.equals(valType)) {
restrictions.putBundle(key, readBundleEntry(parser, values));
} else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) {
final int outerDepth = parser.getDepth();
ArrayList<Bundle> bundleList = new ArrayList<>();
while (XmlUtils.nextElementWithin(parser, outerDepth)) {
Bundle childBundle = readBundleEntry(parser, values);
bundleList.add(childBundle);
}
restrictions.putParcelableArray(key,
bundleList.toArray(new Bundle[bundleList.size()]));
} else {
String value = parser.nextText().trim();
if (ATTR_TYPE_BOOLEAN.equals(valType)) {
restrictions.putBoolean(key, Boolean.parseBoolean(value));
} else if (ATTR_TYPE_INTEGER.equals(valType)) {
restrictions.putInt(key, Integer.parseInt(value));
} else {
restrictions.putString(key, value);
}
}
}
}
private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values)
throws IOException, XmlPullParserException {
Bundle childBundle = new Bundle();
final int outerDepth = parser.getDepth();
while (XmlUtils.nextElementWithin(parser, outerDepth)) {
readEntry(childBundle, values, parser);
}
return childBundle;
}
private void writeApplicationRestrictionsLP(String packageName,
Bundle restrictions, int userId) {
AtomicFile restrictionsFile = new AtomicFile(
new File(Environment.getUserSystemDirectory(userId),
packageToRestrictionsFileName(packageName)));
writeApplicationRestrictionsLP(restrictions, restrictionsFile);
}
@VisibleForTesting
static void writeApplicationRestrictionsLP(Bundle restrictions, AtomicFile restrictionsFile) {
FileOutputStream fos = null;
try {
fos = restrictionsFile.startWrite();
final BufferedOutputStream bos = new BufferedOutputStream(fos);
final XmlSerializer serializer = new FastXmlSerializer();
serializer.setOutput(bos, StandardCharsets.UTF_8.name());
serializer.startDocument(null, true);
serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true);
serializer.startTag(null, TAG_RESTRICTIONS);
writeBundle(restrictions, serializer);
serializer.endTag(null, TAG_RESTRICTIONS);
serializer.endDocument();
restrictionsFile.finishWrite(fos);
} catch (Exception e) {
restrictionsFile.failWrite(fos);
Slog.e(LOG_TAG, "Error writing application restrictions list", e);
}
}
private static void writeBundle(Bundle restrictions, XmlSerializer serializer)
throws IOException {
for (String key : restrictions.keySet()) {
Object value = restrictions.get(key);
serializer.startTag(null, TAG_ENTRY);
serializer.attribute(null, ATTR_KEY, key);
if (value instanceof Boolean) {
serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN);
serializer.text(value.toString());
} else if (value instanceof Integer) {
serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER);
serializer.text(value.toString());
} else if (value == null || value instanceof String) {
serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING);
serializer.text(value != null ? (String) value : "");
} else if (value instanceof Bundle) {
serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE);
writeBundle((Bundle) value, serializer);
} else if (value instanceof Parcelable[]) {
serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY);
Parcelable[] array = (Parcelable[]) value;
for (Parcelable parcelable : array) {
if (!(parcelable instanceof Bundle)) {
throw new IllegalArgumentException("bundle-array can only hold Bundles");
}
serializer.startTag(null, TAG_ENTRY);
serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE);
writeBundle((Bundle) parcelable, serializer);
serializer.endTag(null, TAG_ENTRY);
}
} else {
serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY);
String[] values = (String[]) value;
serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length));
for (String choice : values) {
serializer.startTag(null, TAG_VALUE);
serializer.text(choice != null ? choice : "");
serializer.endTag(null, TAG_VALUE);
}
}
serializer.endTag(null, TAG_ENTRY);
}
}
@Override
public int getUserSerialNumber(int userHandle) {
synchronized (mUsersLock) {
if (!exists(userHandle)) return -1;
return getUserInfoLU(userHandle).serialNumber;
}
}
@Override
public int getUserHandle(int userSerialNumber) {
synchronized (mUsersLock) {
for (int userId : mUserIds) {
UserInfo info = getUserInfoLU(userId);
if (info != null && info.serialNumber == userSerialNumber) return userId;
}
// Not found
return -1;
}
}
@Override
public long getUserCreationTime(int userHandle) {
int callingUserId = UserHandle.getCallingUserId();
UserInfo userInfo = null;
synchronized (mUsersLock) {
if (callingUserId == userHandle) {
userInfo = getUserInfoLU(userHandle);
} else {
UserInfo parent = getProfileParentLU(userHandle);
if (parent != null && parent.id == callingUserId) {
userInfo = getUserInfoLU(userHandle);
}
}
}
if (userInfo == null) {
throw new SecurityException("userHandle can only be the calling user or a managed "
+ "profile associated with this user");
}
return userInfo.creationTime;
}
/**
* Caches the list of user ids in an array, adjusting the array size when necessary.
*/
private void updateUserIds() {
int num = 0;
synchronized (mUsersLock) {
final int userSize = mUsers.size();
for (int i = 0; i < userSize; i++) {
if (!mUsers.valueAt(i).partial) {
num++;
}
}
final int[] newUsers = new int[num];
int n = 0;
for (int i = 0; i < userSize; i++) {
if (!mUsers.valueAt(i).partial) {
newUsers[n++] = mUsers.keyAt(i);
}
}
mUserIds = newUsers;
}
}
/**
* Called right before a user starts. This will not be called for the system user.
*/
public void onBeforeStartUser(int userId) {
synchronized (mRestrictionsLock) {
applyUserRestrictionsLR(userId);
}
}
/**
* Make a note of the last started time of a user and do some cleanup.
* @param userId the user that was just foregrounded
*/
public void onUserForeground(int userId) {
UserInfo user = getUserInfoNoChecks(userId);
if (user == null || user.partial) {
Slog.w(LOG_TAG, "userForeground: unknown user #" + userId);
return;
}
long now = System.currentTimeMillis();
if (now > EPOCH_PLUS_30_YEARS) {
user.lastLoggedInTime = now;
scheduleWriteUser(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.
*/
private int getNextAvailableId() {
synchronized (mUsersLock) {
int i = MIN_USER_ID;
while (i < MAX_USER_ID) {
if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) {
return i;
}
i++;
}
}
throw new IllegalStateException("No user id available!");
}
private String packageToRestrictionsFileName(String packageName) {
return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX;
}
/**
* Enforce that serial number stored in user directory inode matches the
* given expected value. Gracefully sets the serial number if currently
* undefined.
*
* @throws IOException when problem extracting serial number, or serial
* number is mismatched.
*/
public static void enforceSerialNumber(File file, int serialNumber) throws IOException {
final int foundSerial = getSerialNumber(file);
Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial);
if (foundSerial == -1) {
Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid");
try {
setSerialNumber(file, serialNumber);
} catch (IOException e) {
Slog.w(LOG_TAG, "Failed to set serial number on " + file, e);
}
} else if (foundSerial != serialNumber) {
throw new IOException("Found serial number " + foundSerial
+ " doesn't match expected " + serialNumber);
}
}
/**
* Set serial number stored in user directory inode.
*
* @throws IOException if serial number was already set
*/
private static void setSerialNumber(File file, int serialNumber)
throws IOException {
try {
final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8);
Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE);
} catch (ErrnoException e) {
throw e.rethrowAsIOException();
}
}
/**
* Return serial number stored in user directory inode.
*
* @return parsed serial number, or -1 if not set
*/
private static int getSerialNumber(File file) throws IOException {
try {
final byte[] buf = new byte[256];
final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf);
final String serial = new String(buf, 0, len);
try {
return Integer.parseInt(serial);
} catch (NumberFormatException e) {
throw new IOException("Bad serial number: " + serial);
}
} catch (ErrnoException e) {
if (e.errno == OsConstants.ENODATA) {
return -1;
} else {
throw e.rethrowAsIOException();
}
}
}
@Override
public void onShellCommand(FileDescriptor in, FileDescriptor out,
FileDescriptor err, String[] args, ResultReceiver resultReceiver) {
(new Shell()).exec(this, in, out, err, args, resultReceiver);
}
int onShellCommand(Shell shell, String cmd) {
if (cmd == null) {
return shell.handleDefaultCommands(cmd);
}
final PrintWriter pw = shell.getOutPrintWriter();
try {
switch(cmd) {
case "list":
return runList(pw);
}
} catch (RemoteException e) {
pw.println("Remote exception: " + e);
}
return -1;
}
private int runList(PrintWriter pw) throws RemoteException {
final IActivityManager am = ActivityManagerNative.getDefault();
final List<UserInfo> users = getUsers(false);
if (users == null) {
pw.println("Error: couldn't get users");
return 1;
} else {
pw.println("Users:");
for (int i = 0; i < users.size(); i++) {
String running = am.isUserRunning(users.get(i).id, 0) ? " running" : "";
pw.println("\t" + users.get(i).toString() + running);
}
return 0;
}
}
@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) {
synchronized (mUsersLock) {
pw.println("Users:");
for (int i = 0; i < mUsers.size(); i++) {
UserInfo user = mUsers.valueAt(i);
if (user == null) {
continue;
}
final int userId = user.id;
pw.print(" "); pw.print(user);
pw.print(" serialNo="); pw.print(user.serialNumber);
if (mRemovingUserIds.get(userId)) {
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);
}
pw.print(" Has profile owner: ");
pw.println(mIsUserManaged.get(userId));
pw.println(" Restrictions:");
synchronized (mRestrictionsLock) {
UserRestrictionsUtils.dumpRestrictions(
pw, " ", mBaseUserRestrictions.get(user.id));
pw.println(" Device policy local restrictions:");
UserRestrictionsUtils.dumpRestrictions(
pw, " ", mDevicePolicyLocalUserRestrictions.get(user.id));
pw.println(" Effective restrictions:");
UserRestrictionsUtils.dumpRestrictions(
pw, " ", mCachedEffectiveUserRestrictions.get(user.id));
}
pw.println();
String accountName = mUserAccounts.get(userId);
if (accountName != null) {
pw.print(" Account name: " + accountName);
pw.println();
}
}
}
pw.println(" Device policy global restrictions:");
synchronized (mRestrictionsLock) {
UserRestrictionsUtils
.dumpRestrictions(pw, " ", mDevicePolicyGlobalUserRestrictions);
}
pw.println();
pw.println(" Guest restrictions:");
synchronized (mGuestRestrictions) {
UserRestrictionsUtils.dumpRestrictions(pw, " ", mGuestRestrictions);
}
synchronized (mUsersLock) {
pw.println();
pw.println(" Device managed: " + mIsDeviceManaged);
}
}
}
final class MainHandler extends Handler {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case WRITE_USER_MSG:
removeMessages(WRITE_USER_MSG, msg.obj);
synchronized (mPackagesLock) {
int userId = ((UserInfo) msg.obj).id;
UserInfo userInfo = getUserInfoNoChecks(userId);
if (userInfo != null) {
writeUserLP(userInfo);
}
}
}
}
}
/**
* @param userId
* @return whether the user has been initialized yet
*/
boolean isInitialized(int userId) {
return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0;
}
private class LocalService extends UserManagerInternal {
@Override
public void setDevicePolicyUserRestrictions(int userId, @NonNull Bundle localRestrictions,
@Nullable Bundle globalRestrictions) {
UserManagerService.this.setDevicePolicyUserRestrictions(userId, localRestrictions,
globalRestrictions);
}
@Override
public Bundle getBaseUserRestrictions(int userId) {
synchronized (mRestrictionsLock) {
return mBaseUserRestrictions.get(userId);
}
}
@Override
public void setBaseUserRestrictionsByDpmsForMigration(
int userId, Bundle baseRestrictions) {
synchronized (mRestrictionsLock) {
mBaseUserRestrictions.put(userId, new Bundle(baseRestrictions));
invalidateEffectiveUserRestrictionsLR(userId);
}
final UserInfo userInfo = getUserInfoNoChecks(userId);
synchronized (mPackagesLock) {
if (userInfo != null) {
writeUserLP(userInfo);
} else {
Slog.w(LOG_TAG, "UserInfo not found for " + userId);
}
}
}
@Override
public boolean getUserRestriction(int userId, String key) {
return getUserRestrictions(userId).getBoolean(key);
}
@Override
public void addUserRestrictionsListener(UserRestrictionsListener listener) {
synchronized (mUserRestrictionsListeners) {
mUserRestrictionsListeners.add(listener);
}
}
@Override
public void removeUserRestrictionsListener(UserRestrictionsListener listener) {
synchronized (mUserRestrictionsListeners) {
mUserRestrictionsListeners.remove(listener);
}
}
@Override
public void setDeviceManaged(boolean isManaged) {
synchronized (mUsersLock) {
mIsDeviceManaged = isManaged;
}
}
@Override
public void setUserManaged(int userId, boolean isManaged) {
synchronized (mUsersLock) {
mIsUserManaged.put(userId, isManaged);
}
}
}
private class Shell extends ShellCommand {
@Override
public int onCommand(String cmd) {
return onShellCommand(this, cmd);
}
@Override
public void onHelp() {
final PrintWriter pw = getOutPrintWriter();
pw.println("User manager (user) commands:");
pw.println(" help");
pw.println(" Print this help text.");
pw.println("");
pw.println(" list");
pw.println(" Prints all users on the system.");
}
}
private static void debug(String message) {
Log.d(LOG_TAG, message +
(DBG_WITH_STACKTRACE ? " called at\n" + Debug.getCallers(10, " ") : ""));
}
}