UserManagerService.java revision 0e62384ccbd00e9f78851929ca88b919679ee32e
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.pm; 18 19import android.Manifest; 20import android.annotation.NonNull; 21import android.annotation.Nullable; 22import android.app.Activity; 23import android.app.ActivityManager; 24import android.app.ActivityManagerInternal; 25import android.app.ActivityManagerNative; 26import android.app.IActivityManager; 27import android.app.IStopUserCallback; 28import android.content.BroadcastReceiver; 29import android.content.Context; 30import android.content.Intent; 31import android.content.pm.ApplicationInfo; 32import android.content.pm.PackageManager; 33import android.content.pm.PackageManager.NameNotFoundException; 34import android.content.pm.UserInfo; 35import android.graphics.Bitmap; 36import android.os.Binder; 37import android.os.Bundle; 38import android.os.Debug; 39import android.os.Environment; 40import android.os.FileUtils; 41import android.os.Handler; 42import android.os.IUserManager; 43import android.os.Message; 44import android.os.ParcelFileDescriptor; 45import android.os.Parcelable; 46import android.os.Process; 47import android.os.RemoteException; 48import android.os.ResultReceiver; 49import android.os.ServiceManager; 50import android.os.ShellCommand; 51import android.os.UserHandle; 52import android.os.UserManager; 53import android.os.UserManagerInternal; 54import android.os.UserManagerInternal.UserRestrictionsListener; 55import android.os.storage.StorageManager; 56import android.os.storage.VolumeInfo; 57import android.system.ErrnoException; 58import android.system.Os; 59import android.system.OsConstants; 60import android.util.AtomicFile; 61import android.util.Log; 62import android.util.Pair; 63import android.util.Slog; 64import android.util.SparseArray; 65import android.util.SparseBooleanArray; 66import android.util.TimeUtils; 67import android.util.Xml; 68 69import com.android.internal.annotations.GuardedBy; 70import com.android.internal.annotations.VisibleForTesting; 71import com.android.internal.app.IAppOpsService; 72import com.android.internal.logging.MetricsLogger; 73import com.android.internal.util.FastXmlSerializer; 74import com.android.internal.util.Preconditions; 75import com.android.internal.util.XmlUtils; 76import com.android.internal.widget.LockPatternUtils; 77import com.android.server.LocalServices; 78import com.android.server.pm.Installer.StorageFlags; 79 80import org.xmlpull.v1.XmlPullParser; 81import org.xmlpull.v1.XmlPullParserException; 82import org.xmlpull.v1.XmlSerializer; 83 84import java.io.BufferedOutputStream; 85import java.io.File; 86import java.io.FileDescriptor; 87import java.io.FileInputStream; 88import java.io.FileNotFoundException; 89import java.io.FileOutputStream; 90import java.io.IOException; 91import java.io.PrintWriter; 92import java.nio.charset.StandardCharsets; 93import java.util.ArrayList; 94import java.util.List; 95 96import libcore.io.IoUtils; 97import libcore.util.Objects; 98 99/** 100 * Service for {@link UserManager}. 101 * 102 * Method naming convention: 103 * <ul> 104 * <li> Methods suffixed with "LP" should be called within the {@link #mPackagesLock} lock. 105 * <li> Methods suffixed with "LR" should be called within the {@link #mRestrictionsLock} lock. 106 * <li> Methods suffixed with "LU" should be called within the {@link #mUsersLock} lock. 107 * </ul> 108 */ 109public class UserManagerService extends IUserManager.Stub { 110 private static final String LOG_TAG = "UserManagerService"; 111 static final boolean DBG = false; // DO NOT SUBMIT WITH TRUE 112 private static final boolean DBG_WITH_STACKTRACE = false; // DO NOT SUBMIT WITH TRUE 113 114 private static final String TAG_NAME = "name"; 115 private static final String TAG_ACCOUNT = "account"; 116 private static final String ATTR_FLAGS = "flags"; 117 private static final String ATTR_ICON_PATH = "icon"; 118 private static final String ATTR_ID = "id"; 119 private static final String ATTR_CREATION_TIME = "created"; 120 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 121 private static final String ATTR_SERIAL_NO = "serialNumber"; 122 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 123 private static final String ATTR_PARTIAL = "partial"; 124 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 125 private static final String ATTR_USER_VERSION = "version"; 126 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 127 private static final String ATTR_RESTRICTED_PROFILE_PARENT_ID = "restrictedProfileParentId"; 128 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 129 private static final String TAG_USERS = "users"; 130 private static final String TAG_USER = "user"; 131 private static final String TAG_RESTRICTIONS = "restrictions"; 132 private static final String TAG_DEVICE_POLICY_RESTRICTIONS = "device_policy_restrictions"; 133 private static final String TAG_ENTRY = "entry"; 134 private static final String TAG_VALUE = "value"; 135 private static final String ATTR_KEY = "key"; 136 private static final String ATTR_VALUE_TYPE = "type"; 137 private static final String ATTR_MULTIPLE = "m"; 138 139 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 140 private static final String ATTR_TYPE_STRING = "s"; 141 private static final String ATTR_TYPE_BOOLEAN = "b"; 142 private static final String ATTR_TYPE_INTEGER = "i"; 143 private static final String ATTR_TYPE_BUNDLE = "B"; 144 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 145 146 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 147 private static final String USER_LIST_FILENAME = "userlist.xml"; 148 private static final String USER_PHOTO_FILENAME = "photo.png"; 149 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 150 151 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 152 private static final String XML_SUFFIX = ".xml"; 153 154 private static final int MIN_USER_ID = 10; 155 // We need to keep process uid within Integer.MAX_VALUE. 156 private static final int MAX_USER_ID = Integer.MAX_VALUE / UserHandle.PER_USER_RANGE; 157 158 private static final int USER_VERSION = 6; 159 160 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 161 162 // Maximum number of managed profiles permitted per user is 1. This cannot be increased 163 // without first making sure that the rest of the framework is prepared for it. 164 private static final int MAX_MANAGED_PROFILES = 1; 165 166 static final int WRITE_USER_MSG = 1; 167 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 168 169 private static final String XATTR_SERIAL = "user.serial"; 170 171 // Tron counters 172 private static final String TRON_GUEST_CREATED = "users_guest_created"; 173 private static final String TRON_USER_CREATED = "users_user_created"; 174 175 private final Context mContext; 176 private final PackageManagerService mPm; 177 private final Object mPackagesLock; 178 // Short-term lock for internal state, when interaction/sync with PM is not required 179 private final Object mUsersLock = new Object(); 180 private final Object mRestrictionsLock = new Object(); 181 182 private final Handler mHandler; 183 184 private final File mUsersDir; 185 private final File mUserListFile; 186 187 @GuardedBy("mUsersLock") 188 private final SparseArray<UserInfo> mUsers = new SparseArray<>(); 189 190 /** 191 * This collection contains each user's account name if the user chose to set one up 192 * during the initial user creation process. Keeping this information separate from mUsers 193 * to avoid accidentally leak it. 194 */ 195 @GuardedBy("mUsersLock") 196 private final SparseArray<String> mUserAccounts = new SparseArray<>(); 197 198 /** 199 * User restrictions set via UserManager. This doesn't include restrictions set by 200 * device owner / profile owners. 201 * 202 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 203 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 204 * maybe shared between {@link #mBaseUserRestrictions} and 205 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 206 * (Otherwise we won't be able to detect what restrictions have changed in 207 * {@link #updateUserRestrictionsInternalLR}. 208 */ 209 @GuardedBy("mRestrictionsLock") 210 private final SparseArray<Bundle> mBaseUserRestrictions = new SparseArray<>(); 211 212 /** 213 * Cached user restrictions that are in effect -- i.e. {@link #mBaseUserRestrictions} combined 214 * with device / profile owner restrictions. We'll initialize it lazily; use 215 * {@link #getEffectiveUserRestrictions} to access it. 216 * 217 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 218 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 219 * maybe shared between {@link #mBaseUserRestrictions} and 220 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 221 * (Otherwise we won't be able to detect what restrictions have changed in 222 * {@link #updateUserRestrictionsInternalLR}. 223 */ 224 @GuardedBy("mRestrictionsLock") 225 private final SparseArray<Bundle> mCachedEffectiveUserRestrictions = new SparseArray<>(); 226 227 /** 228 * User restrictions that have already been applied in 229 * {@link #updateUserRestrictionsInternalLR(Bundle, int)}. We use it to detect restrictions 230 * that have changed since the last 231 * {@link #updateUserRestrictionsInternalLR(Bundle, int)} call. 232 */ 233 @GuardedBy("mRestrictionsLock") 234 private final SparseArray<Bundle> mAppliedUserRestrictions = new SparseArray<>(); 235 236 /** 237 * User restrictions set by {@link com.android.server.devicepolicy.DevicePolicyManagerService} 238 * that should be applied to all users, including guests. 239 */ 240 @GuardedBy("mRestrictionsLock") 241 private Bundle mDevicePolicyGlobalUserRestrictions; 242 243 /** 244 * User restrictions set by {@link com.android.server.devicepolicy.DevicePolicyManagerService} 245 * for each user. 246 */ 247 @GuardedBy("mRestrictionsLock") 248 private final SparseArray<Bundle> mDevicePolicyLocalUserRestrictions = new SparseArray<>(); 249 250 @GuardedBy("mGuestRestrictions") 251 private final Bundle mGuestRestrictions = new Bundle(); 252 253 /** 254 * Set of user IDs being actively removed. Removed IDs linger in this set 255 * for several seconds to work around a VFS caching issue. 256 */ 257 @GuardedBy("mUsersLock") 258 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 259 260 @GuardedBy("mUsersLock") 261 private int[] mUserIds; 262 @GuardedBy("mPackagesLock") 263 private int mNextSerialNumber; 264 private int mUserVersion = 0; 265 266 private IAppOpsService mAppOpsService; 267 268 private final LocalService mLocalService; 269 270 @GuardedBy("mUsersLock") 271 private boolean mIsDeviceManaged; 272 273 @GuardedBy("mUsersLock") 274 private final SparseBooleanArray mIsUserManaged = new SparseBooleanArray(); 275 276 @GuardedBy("mUserRestrictionsListeners") 277 private final ArrayList<UserRestrictionsListener> mUserRestrictionsListeners = 278 new ArrayList<>(); 279 280 private final LockPatternUtils mLockPatternUtils; 281 282 private static UserManagerService sInstance; 283 284 public static UserManagerService getInstance() { 285 synchronized (UserManagerService.class) { 286 return sInstance; 287 } 288 } 289 290 @VisibleForTesting 291 UserManagerService(File dataDir) { 292 this(null, null, new Object(), dataDir); 293 } 294 295 /** 296 * Called by package manager to create the service. This is closely 297 * associated with the package manager, and the given lock is the 298 * package manager's own lock. 299 */ 300 UserManagerService(Context context, PackageManagerService pm, Object packagesLock) { 301 this(context, pm, packagesLock, Environment.getDataDirectory()); 302 } 303 304 private UserManagerService(Context context, PackageManagerService pm, 305 Object packagesLock, File dataDir) { 306 mContext = context; 307 mPm = pm; 308 mPackagesLock = packagesLock; 309 mHandler = new MainHandler(); 310 synchronized (mPackagesLock) { 311 mUsersDir = new File(dataDir, USER_INFO_DIR); 312 mUsersDir.mkdirs(); 313 // Make zeroth user directory, for services to migrate their files to that location 314 File userZeroDir = new File(mUsersDir, String.valueOf(UserHandle.USER_SYSTEM)); 315 userZeroDir.mkdirs(); 316 FileUtils.setPermissions(mUsersDir.toString(), 317 FileUtils.S_IRWXU | FileUtils.S_IRWXG | FileUtils.S_IROTH | FileUtils.S_IXOTH, 318 -1, -1); 319 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 320 initDefaultGuestRestrictions(); 321 readUserListLP(); 322 sInstance = this; 323 } 324 mLocalService = new LocalService(); 325 LocalServices.addService(UserManagerInternal.class, mLocalService); 326 mLockPatternUtils = new LockPatternUtils(mContext); 327 } 328 329 void systemReady() { 330 // Prune out any partially created, partially removed and ephemeral users. 331 ArrayList<UserInfo> partials = new ArrayList<>(); 332 synchronized (mUsersLock) { 333 final int userSize = mUsers.size(); 334 for (int i = 0; i < userSize; i++) { 335 UserInfo ui = mUsers.valueAt(i); 336 if ((ui.partial || ui.guestToRemove || ui.isEphemeral()) && i != 0) { 337 partials.add(ui); 338 } 339 } 340 } 341 final int partialsSize = partials.size(); 342 for (int i = 0; i < partialsSize; i++) { 343 UserInfo ui = partials.get(i); 344 Slog.w(LOG_TAG, "Removing partially created user " + ui.id 345 + " (name=" + ui.name + ")"); 346 removeUserState(ui.id); 347 } 348 349 onUserForeground(UserHandle.USER_SYSTEM); 350 351 mAppOpsService = IAppOpsService.Stub.asInterface( 352 ServiceManager.getService(Context.APP_OPS_SERVICE)); 353 354 synchronized (mRestrictionsLock) { 355 applyUserRestrictionsLR(UserHandle.USER_SYSTEM); 356 } 357 } 358 359 @Override 360 public String getUserAccount(int userId) { 361 checkManageUserAndAcrossUsersFullPermission("get user account"); 362 synchronized (mUsersLock) { 363 return mUserAccounts.get(userId); 364 } 365 } 366 367 @Override 368 public void setUserAccount(int userId, String accountName) { 369 checkManageUserAndAcrossUsersFullPermission("set user account"); 370 UserInfo userToUpdate = null; 371 synchronized (mPackagesLock) { 372 synchronized (mUsersLock) { 373 String currentAccount = mUserAccounts.get(userId); 374 if (!Objects.equal(currentAccount, accountName)) { 375 mUserAccounts.put(userId, accountName); 376 userToUpdate = mUsers.get(userId); 377 } 378 } 379 380 if (userToUpdate != null) { 381 writeUserLP(userToUpdate); 382 } 383 } 384 } 385 386 @Override 387 public UserInfo getPrimaryUser() { 388 checkManageUsersPermission("query users"); 389 synchronized (mUsersLock) { 390 final int userSize = mUsers.size(); 391 for (int i = 0; i < userSize; i++) { 392 UserInfo ui = mUsers.valueAt(i); 393 if (ui.isPrimary() && !mRemovingUserIds.get(ui.id)) { 394 return ui; 395 } 396 } 397 } 398 return null; 399 } 400 401 @Override 402 public @NonNull List<UserInfo> getUsers(boolean excludeDying) { 403 checkManageUsersPermission("query users"); 404 synchronized (mUsersLock) { 405 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 406 final int userSize = mUsers.size(); 407 for (int i = 0; i < userSize; i++) { 408 UserInfo ui = mUsers.valueAt(i); 409 if (ui.partial) { 410 continue; 411 } 412 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 413 users.add(ui); 414 } 415 } 416 return users; 417 } 418 } 419 420 @Override 421 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 422 if (userId != UserHandle.getCallingUserId()) { 423 checkManageUsersPermission("getting profiles related to user " + userId); 424 } 425 final long ident = Binder.clearCallingIdentity(); 426 try { 427 synchronized (mUsersLock) { 428 return getProfilesLU(userId, enabledOnly); 429 } 430 } finally { 431 Binder.restoreCallingIdentity(ident); 432 } 433 } 434 435 /** Assume permissions already checked and caller's identity cleared */ 436 private List<UserInfo> getProfilesLU(int userId, boolean enabledOnly) { 437 UserInfo user = getUserInfoLU(userId); 438 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 439 if (user == null) { 440 // Probably a dying user 441 return users; 442 } 443 final int userSize = mUsers.size(); 444 for (int i = 0; i < userSize; i++) { 445 UserInfo profile = mUsers.valueAt(i); 446 if (!isProfileOf(user, profile)) { 447 continue; 448 } 449 if (enabledOnly && !profile.isEnabled()) { 450 continue; 451 } 452 if (mRemovingUserIds.get(profile.id)) { 453 continue; 454 } 455 users.add(profile); 456 } 457 return users; 458 } 459 460 @Override 461 public int getCredentialOwnerProfile(int userHandle) { 462 checkManageUsersPermission("get the credential owner"); 463 if (!mLockPatternUtils.isSeparateProfileChallengeEnabled(userHandle)) { 464 synchronized (mUsersLock) { 465 UserInfo profileParent = getProfileParentLU(userHandle); 466 if (profileParent != null) { 467 return profileParent.id; 468 } 469 } 470 } 471 472 return userHandle; 473 } 474 475 @Override 476 public boolean isSameProfileGroup(int userId, int otherUserId) { 477 if (userId == otherUserId) return true; 478 checkManageUsersPermission("check if in the same profile group"); 479 synchronized (mPackagesLock) { 480 return isSameProfileGroupLP(userId, otherUserId); 481 } 482 } 483 484 private boolean isSameProfileGroupLP(int userId, int otherUserId) { 485 synchronized (mUsersLock) { 486 UserInfo userInfo = getUserInfoLU(userId); 487 if (userInfo == null || userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 488 return false; 489 } 490 UserInfo otherUserInfo = getUserInfoLU(otherUserId); 491 if (otherUserInfo == null 492 || otherUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 493 return false; 494 } 495 return userInfo.profileGroupId == otherUserInfo.profileGroupId; 496 } 497 } 498 499 @Override 500 public UserInfo getProfileParent(int userHandle) { 501 checkManageUsersPermission("get the profile parent"); 502 synchronized (mUsersLock) { 503 return getProfileParentLU(userHandle); 504 } 505 } 506 507 private UserInfo getProfileParentLU(int userHandle) { 508 UserInfo profile = getUserInfoLU(userHandle); 509 if (profile == null) { 510 return null; 511 } 512 int parentUserId = profile.profileGroupId; 513 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 514 return null; 515 } else { 516 return getUserInfoLU(parentUserId); 517 } 518 } 519 520 private static boolean isProfileOf(UserInfo user, UserInfo profile) { 521 return user.id == profile.id || 522 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 523 && user.profileGroupId == profile.profileGroupId); 524 } 525 526 private void broadcastProfileAvailabilityChanges(UserHandle profileHandle, 527 UserHandle parentHandle, Bundle extras) { 528 // Send intent to profile 529 Intent intent = new Intent(Intent.ACTION_AVAILABILITY_CHANGED); 530 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 531 intent.putExtras(extras); 532 mContext.sendBroadcastAsUser(intent, profileHandle); 533 534 // Send intent to parent 535 if (parentHandle != null) { 536 intent = new Intent(Intent.ACTION_MANAGED_PROFILE_AVAILABILITY_CHANGED); 537 intent.putExtra(Intent.EXTRA_USER, profileHandle); 538 intent.putExtra(Intent.EXTRA_USER_HANDLE, profileHandle.getIdentifier()); 539 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 540 intent.putExtras(extras); 541 mContext.sendBroadcastAsUser(intent, parentHandle); 542 } 543 } 544 545 @Override 546 public void setQuietModeEnabled(int userHandle, boolean enableQuietMode) { 547 checkManageUsersPermission("silence profile"); 548 boolean changed = false; 549 UserInfo profile, parent; 550 synchronized (mPackagesLock) { 551 synchronized (mUsersLock) { 552 profile = getUserInfoLU(userHandle); 553 parent = getProfileParentLU(userHandle); 554 555 } 556 if (profile == null || !profile.isManagedProfile()) { 557 throw new IllegalArgumentException("User " + userHandle + " is not a profile"); 558 } 559 if (profile.isQuietModeEnabled() != enableQuietMode) { 560 profile.flags ^= UserInfo.FLAG_QUIET_MODE; 561 writeUserLP(profile); 562 changed = true; 563 } 564 } 565 if (changed) { 566 Bundle extras = new Bundle(); 567 extras.putBoolean(Intent.EXTRA_QUIET_MODE, enableQuietMode); 568 broadcastProfileAvailabilityChanges(profile.getUserHandle(), 569 parent != null ? parent.getUserHandle() : null, extras); 570 } 571 } 572 573 @Override 574 public boolean isQuietModeEnabled(int userHandle) { 575 synchronized (mPackagesLock) { 576 UserInfo info; 577 synchronized (mUsersLock) { 578 info = getUserInfoLU(userHandle); 579 } 580 if (info == null || !info.isManagedProfile()) { 581 throw new IllegalArgumentException("User " + userHandle + " is not a profile"); 582 } 583 return info.isQuietModeEnabled(); 584 } 585 } 586 587 @Override 588 public void setUserEnabled(int userId) { 589 checkManageUsersPermission("enable user"); 590 synchronized (mPackagesLock) { 591 UserInfo info; 592 synchronized (mUsersLock) { 593 info = getUserInfoLU(userId); 594 } 595 if (info != null && !info.isEnabled()) { 596 info.flags ^= UserInfo.FLAG_DISABLED; 597 writeUserLP(info); 598 } 599 } 600 } 601 602 @Override 603 public UserInfo getUserInfo(int userId) { 604 checkManageUsersPermission("query user"); 605 synchronized (mUsersLock) { 606 return getUserInfoLU(userId); 607 } 608 } 609 610 @Override 611 public boolean isRestricted() { 612 synchronized (mUsersLock) { 613 return getUserInfoLU(UserHandle.getCallingUserId()).isRestricted(); 614 } 615 } 616 617 @Override 618 public boolean canHaveRestrictedProfile(int userId) { 619 checkManageUsersPermission("canHaveRestrictedProfile"); 620 synchronized (mUsersLock) { 621 final UserInfo userInfo = getUserInfoLU(userId); 622 if (userInfo == null || !userInfo.canHaveProfile()) { 623 return false; 624 } 625 if (!userInfo.isAdmin()) { 626 return false; 627 } 628 // restricted profile can be created if there is no DO set and the admin user has no PO; 629 return !mIsDeviceManaged && !mIsUserManaged.get(userId); 630 } 631 } 632 633 /* 634 * Should be locked on mUsers before calling this. 635 */ 636 private UserInfo getUserInfoLU(int userId) { 637 UserInfo ui = mUsers.get(userId); 638 // If it is partial and not in the process of being removed, return as unknown user. 639 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 640 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 641 return null; 642 } 643 return ui; 644 } 645 646 /** 647 * Obtains {@link #mUsersLock} and return UserInfo from mUsers. 648 * <p>No permissions checking or any addition checks are made</p> 649 */ 650 private UserInfo getUserInfoNoChecks(int userId) { 651 synchronized (mUsersLock) { 652 return mUsers.get(userId); 653 } 654 } 655 656 /** Called by PackageManagerService */ 657 public boolean exists(int userId) { 658 return getUserInfoNoChecks(userId) != null; 659 } 660 661 @Override 662 public void setUserName(int userId, String name) { 663 checkManageUsersPermission("rename users"); 664 boolean changed = false; 665 synchronized (mPackagesLock) { 666 UserInfo info = getUserInfoNoChecks(userId); 667 if (info == null || info.partial) { 668 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 669 return; 670 } 671 if (name != null && !name.equals(info.name)) { 672 info.name = name; 673 writeUserLP(info); 674 changed = true; 675 } 676 } 677 if (changed) { 678 sendUserInfoChangedBroadcast(userId); 679 } 680 } 681 682 @Override 683 public void setUserIcon(int userId, Bitmap bitmap) { 684 checkManageUsersPermission("update users"); 685 long ident = Binder.clearCallingIdentity(); 686 try { 687 synchronized (mPackagesLock) { 688 UserInfo info = getUserInfoNoChecks(userId); 689 if (info == null || info.partial) { 690 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 691 return; 692 } 693 writeBitmapLP(info, bitmap); 694 writeUserLP(info); 695 } 696 sendUserInfoChangedBroadcast(userId); 697 } finally { 698 Binder.restoreCallingIdentity(ident); 699 } 700 } 701 702 private void sendUserInfoChangedBroadcast(int userId) { 703 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 704 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 705 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 706 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 707 } 708 709 @Override 710 public ParcelFileDescriptor getUserIcon(int userId) { 711 String iconPath; 712 synchronized (mPackagesLock) { 713 UserInfo info = getUserInfoNoChecks(userId); 714 if (info == null || info.partial) { 715 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 716 return null; 717 } 718 int callingGroupId = getUserInfoNoChecks(UserHandle.getCallingUserId()).profileGroupId; 719 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 720 || callingGroupId != info.profileGroupId) { 721 checkManageUsersPermission("get the icon of a user who is not related"); 722 } 723 if (info.iconPath == null) { 724 return null; 725 } 726 iconPath = info.iconPath; 727 } 728 729 try { 730 return ParcelFileDescriptor.open( 731 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 732 } catch (FileNotFoundException e) { 733 Log.e(LOG_TAG, "Couldn't find icon file", e); 734 } 735 return null; 736 } 737 738 public void makeInitialized(int userId) { 739 checkManageUsersPermission("makeInitialized"); 740 boolean scheduleWriteUser = false; 741 UserInfo info; 742 synchronized (mUsersLock) { 743 info = mUsers.get(userId); 744 if (info == null || info.partial) { 745 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 746 return; 747 } 748 if ((info.flags & UserInfo.FLAG_INITIALIZED) == 0) { 749 info.flags |= UserInfo.FLAG_INITIALIZED; 750 scheduleWriteUser = true; 751 } 752 } 753 if (scheduleWriteUser) { 754 scheduleWriteUser(info); 755 } 756 } 757 758 /** 759 * If default guest restrictions haven't been initialized yet, add the basic 760 * restrictions. 761 */ 762 private void initDefaultGuestRestrictions() { 763 synchronized (mGuestRestrictions) { 764 if (mGuestRestrictions.isEmpty()) { 765 mGuestRestrictions.putBoolean(UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES, true); 766 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 767 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 768 } 769 } 770 } 771 772 @Override 773 public Bundle getDefaultGuestRestrictions() { 774 checkManageUsersPermission("getDefaultGuestRestrictions"); 775 synchronized (mGuestRestrictions) { 776 return new Bundle(mGuestRestrictions); 777 } 778 } 779 780 @Override 781 public void setDefaultGuestRestrictions(Bundle restrictions) { 782 checkManageUsersPermission("setDefaultGuestRestrictions"); 783 synchronized (mGuestRestrictions) { 784 mGuestRestrictions.clear(); 785 mGuestRestrictions.putAll(restrictions); 786 } 787 synchronized (mPackagesLock) { 788 writeUserListLP(); 789 } 790 } 791 792 /** 793 * See {@link UserManagerInternal#setDevicePolicyUserRestrictions(int, Bundle, Bundle)} 794 */ 795 void setDevicePolicyUserRestrictions(int userId, @NonNull Bundle local, 796 @Nullable Bundle global) { 797 Preconditions.checkNotNull(local); 798 boolean globalChanged = false; 799 boolean localChanged; 800 synchronized (mRestrictionsLock) { 801 if (global != null) { 802 // Update global. 803 globalChanged = !UserRestrictionsUtils.areEqual( 804 mDevicePolicyGlobalUserRestrictions, global); 805 if (globalChanged) { 806 mDevicePolicyGlobalUserRestrictions = global; 807 } 808 } 809 { 810 // Update local. 811 final Bundle prev = mDevicePolicyLocalUserRestrictions.get(userId); 812 localChanged = !UserRestrictionsUtils.areEqual(prev, local); 813 if (localChanged) { 814 mDevicePolicyLocalUserRestrictions.put(userId, local); 815 } 816 } 817 } 818 if (DBG) { 819 Log.d(LOG_TAG, "setDevicePolicyUserRestrictions: userId=" + userId 820 + " global=" + global + (globalChanged ? " (changed)" : "") 821 + " local=" + local + (localChanged ? " (changed)" : "") 822 ); 823 } 824 // Don't call them within the mRestrictionsLock. 825 synchronized (mPackagesLock) { 826 if (globalChanged) { 827 writeUserListLP(); 828 } 829 if (localChanged) { 830 writeUserLP(getUserInfoNoChecks(userId)); 831 } 832 } 833 834 synchronized (mRestrictionsLock) { 835 if (globalChanged) { 836 applyUserRestrictionsForAllUsersLR(); 837 } else if (localChanged) { 838 applyUserRestrictionsLR(userId); 839 } 840 } 841 } 842 843 @GuardedBy("mRestrictionsLock") 844 private Bundle computeEffectiveUserRestrictionsLR(int userId) { 845 final Bundle baseRestrictions = 846 UserRestrictionsUtils.nonNull(mBaseUserRestrictions.get(userId)); 847 final Bundle global = mDevicePolicyGlobalUserRestrictions; 848 final Bundle local = mDevicePolicyLocalUserRestrictions.get(userId); 849 850 if (UserRestrictionsUtils.isEmpty(global) && UserRestrictionsUtils.isEmpty(local)) { 851 // Common case first. 852 return baseRestrictions; 853 } 854 final Bundle effective = UserRestrictionsUtils.clone(baseRestrictions); 855 UserRestrictionsUtils.merge(effective, global); 856 UserRestrictionsUtils.merge(effective, local); 857 858 return effective; 859 } 860 861 @GuardedBy("mRestrictionsLock") 862 private void invalidateEffectiveUserRestrictionsLR(int userId) { 863 if (DBG) { 864 Log.d(LOG_TAG, "invalidateEffectiveUserRestrictions userId=" + userId); 865 } 866 mCachedEffectiveUserRestrictions.remove(userId); 867 } 868 869 private Bundle getEffectiveUserRestrictions(int userId) { 870 synchronized (mRestrictionsLock) { 871 Bundle restrictions = mCachedEffectiveUserRestrictions.get(userId); 872 if (restrictions == null) { 873 restrictions = computeEffectiveUserRestrictionsLR(userId); 874 mCachedEffectiveUserRestrictions.put(userId, restrictions); 875 } 876 return restrictions; 877 } 878 } 879 880 /** @return a specific user restriction that's in effect currently. */ 881 @Override 882 public boolean hasUserRestriction(String restrictionKey, int userId) { 883 Bundle restrictions = getEffectiveUserRestrictions(userId); 884 return restrictions != null && restrictions.getBoolean(restrictionKey); 885 } 886 887 /** 888 * @return UserRestrictions that are in effect currently. This always returns a new 889 * {@link Bundle}. 890 */ 891 @Override 892 public Bundle getUserRestrictions(int userId) { 893 return UserRestrictionsUtils.clone(getEffectiveUserRestrictions(userId)); 894 } 895 896 @Override 897 public boolean hasBaseUserRestriction(String restrictionKey, int userId) { 898 checkManageUsersPermission("hasBaseUserRestriction"); 899 synchronized (mRestrictionsLock) { 900 Bundle bundle = mBaseUserRestrictions.get(userId); 901 return (bundle != null && bundle.getBoolean(restrictionKey, false)); 902 } 903 } 904 905 @Override 906 public void setUserRestriction(String key, boolean value, int userId) { 907 checkManageUsersPermission("setUserRestriction"); 908 synchronized (mRestrictionsLock) { 909 // Note we can't modify Bundles stored in mBaseUserRestrictions directly, so create 910 // a copy. 911 final Bundle newRestrictions = UserRestrictionsUtils.clone( 912 mBaseUserRestrictions.get(userId)); 913 newRestrictions.putBoolean(key, value); 914 915 updateUserRestrictionsInternalLR(newRestrictions, userId); 916 } 917 } 918 919 /** 920 * Optionally updating user restrictions, calculate the effective user restrictions and also 921 * propagate to other services and system settings. 922 * 923 * @param newRestrictions User restrictions to set. 924 * If null, will not update user restrictions and only does the propagation. 925 * @param userId target user ID. 926 */ 927 @GuardedBy("mRestrictionsLock") 928 private void updateUserRestrictionsInternalLR( 929 @Nullable Bundle newRestrictions, int userId) { 930 931 final Bundle prevAppliedRestrictions = UserRestrictionsUtils.nonNull( 932 mAppliedUserRestrictions.get(userId)); 933 934 // Update base restrictions. 935 if (newRestrictions != null) { 936 // If newRestrictions == the current one, it's probably a bug. 937 final Bundle prevBaseRestrictions = mBaseUserRestrictions.get(userId); 938 939 Preconditions.checkState(prevBaseRestrictions != newRestrictions); 940 Preconditions.checkState(mCachedEffectiveUserRestrictions.get(userId) 941 != newRestrictions); 942 943 if (!UserRestrictionsUtils.areEqual(prevBaseRestrictions, newRestrictions)) { 944 mBaseUserRestrictions.put(userId, newRestrictions); 945 scheduleWriteUser(getUserInfoNoChecks(userId)); 946 } 947 } 948 949 final Bundle effective = computeEffectiveUserRestrictionsLR(userId); 950 951 mCachedEffectiveUserRestrictions.put(userId, effective); 952 953 // Apply the new restrictions. 954 if (DBG) { 955 debug("Applying user restrictions: userId=" + userId 956 + " new=" + effective + " prev=" + prevAppliedRestrictions); 957 } 958 959 if (mAppOpsService != null) { // We skip it until system-ready. 960 final long token = Binder.clearCallingIdentity(); 961 try { 962 mAppOpsService.setUserRestrictions(effective, userId); 963 } catch (RemoteException e) { 964 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 965 } finally { 966 Binder.restoreCallingIdentity(token); 967 } 968 } 969 970 propagateUserRestrictionsLR(userId, effective, prevAppliedRestrictions); 971 972 mAppliedUserRestrictions.put(userId, new Bundle(effective)); 973 } 974 975 private void propagateUserRestrictionsLR(final int userId, 976 Bundle newRestrictions, Bundle prevRestrictions) { 977 // Note this method doesn't touch any state, meaning it doesn't require mRestrictionsLock 978 // actually, but we still need some kind of synchronization otherwise we might end up 979 // calling listeners out-of-order, thus "LR". 980 981 if (UserRestrictionsUtils.areEqual(newRestrictions, prevRestrictions)) { 982 return; 983 } 984 985 final Bundle newRestrictionsFinal = new Bundle(newRestrictions); 986 final Bundle prevRestrictionsFinal = new Bundle(prevRestrictions); 987 988 mHandler.post(new Runnable() { 989 @Override 990 public void run() { 991 UserRestrictionsUtils.applyUserRestrictions( 992 mContext, userId, newRestrictionsFinal, prevRestrictionsFinal); 993 994 final UserRestrictionsListener[] listeners; 995 synchronized (mUserRestrictionsListeners) { 996 listeners = new UserRestrictionsListener[mUserRestrictionsListeners.size()]; 997 mUserRestrictionsListeners.toArray(listeners); 998 } 999 for (int i = 0; i < listeners.length; i++) { 1000 listeners[i].onUserRestrictionsChanged(userId, 1001 newRestrictionsFinal, prevRestrictionsFinal); 1002 } 1003 } 1004 }); 1005 } 1006 1007 // Package private for the inner class. 1008 void applyUserRestrictionsLR(int userId) { 1009 updateUserRestrictionsInternalLR(null, userId); 1010 } 1011 1012 @GuardedBy("mRestrictionsLock") 1013 // Package private for the inner class. 1014 void applyUserRestrictionsForAllUsersLR() { 1015 if (DBG) { 1016 debug("applyUserRestrictionsForAllUsersLR"); 1017 } 1018 // First, invalidate all cached values. 1019 mCachedEffectiveUserRestrictions.clear(); 1020 1021 // We don't want to call into ActivityManagerNative while taking a lock, so we'll call 1022 // it on a handler. 1023 final Runnable r = new Runnable() { 1024 @Override 1025 public void run() { 1026 // Then get the list of running users. 1027 final int[] runningUsers; 1028 try { 1029 runningUsers = ActivityManagerNative.getDefault().getRunningUserIds(); 1030 } catch (RemoteException e) { 1031 Log.w(LOG_TAG, "Unable to access ActivityManagerNative"); 1032 return; 1033 } 1034 // Then re-calculate the effective restrictions and apply, only for running users. 1035 // It's okay if a new user has started after the getRunningUserIds() call, 1036 // because we'll do the same thing (re-calculate the restrictions and apply) 1037 // when we start a user. 1038 synchronized (mRestrictionsLock) { 1039 for (int i = 0; i < runningUsers.length; i++) { 1040 applyUserRestrictionsLR(runningUsers[i]); 1041 } 1042 } 1043 } 1044 }; 1045 mHandler.post(r); 1046 } 1047 1048 /** 1049 * Check if we've hit the limit of how many users can be created. 1050 */ 1051 private boolean isUserLimitReached() { 1052 int count; 1053 synchronized (mUsersLock) { 1054 count = getAliveUsersExcludingGuestsCountLU(); 1055 } 1056 return count >= UserManager.getMaxSupportedUsers(); 1057 } 1058 1059 @Override 1060 public boolean canAddMoreManagedProfiles(int userId, boolean allowedToRemoveOne) { 1061 checkManageUsersPermission("check if more managed profiles can be added."); 1062 if (ActivityManager.isLowRamDeviceStatic()) { 1063 return false; 1064 } 1065 if (!mContext.getPackageManager().hasSystemFeature( 1066 PackageManager.FEATURE_MANAGED_USERS)) { 1067 return false; 1068 } 1069 // Limit number of managed profiles that can be created 1070 final int managedProfilesCount = getProfiles(userId, true).size() - 1; 1071 final int profilesRemovedCount = managedProfilesCount > 0 && allowedToRemoveOne ? 1 : 0; 1072 if (managedProfilesCount - profilesRemovedCount >= MAX_MANAGED_PROFILES) { 1073 return false; 1074 } 1075 synchronized(mUsersLock) { 1076 UserInfo userInfo = getUserInfoLU(userId); 1077 if (!userInfo.canHaveProfile()) { 1078 return false; 1079 } 1080 int usersCountAfterRemoving = getAliveUsersExcludingGuestsCountLU() 1081 - profilesRemovedCount; 1082 // We allow creating a managed profile in the special case where there is only one user. 1083 return usersCountAfterRemoving == 1 1084 || usersCountAfterRemoving < UserManager.getMaxSupportedUsers(); 1085 } 1086 } 1087 1088 private int getAliveUsersExcludingGuestsCountLU() { 1089 int aliveUserCount = 0; 1090 final int totalUserCount = mUsers.size(); 1091 // Skip over users being removed 1092 for (int i = 0; i < totalUserCount; i++) { 1093 UserInfo user = mUsers.valueAt(i); 1094 if (!mRemovingUserIds.get(user.id) 1095 && !user.isGuest() && !user.partial) { 1096 aliveUserCount++; 1097 } 1098 } 1099 return aliveUserCount; 1100 } 1101 1102 /** 1103 * Enforces that only the system UID or root's UID or apps that have the 1104 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} and 1105 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL INTERACT_ACROSS_USERS_FULL} 1106 * permissions can make certain calls to the UserManager. 1107 * 1108 * @param message used as message if SecurityException is thrown 1109 * @throws SecurityException if the caller does not have enough privilege. 1110 */ 1111 private static final void checkManageUserAndAcrossUsersFullPermission(String message) { 1112 final int uid = Binder.getCallingUid(); 1113 if (uid != Process.SYSTEM_UID && uid != 0 1114 && ActivityManager.checkComponentPermission( 1115 Manifest.permission.MANAGE_USERS, 1116 uid, -1, true) != PackageManager.PERMISSION_GRANTED 1117 && ActivityManager.checkComponentPermission( 1118 Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1119 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 1120 throw new SecurityException( 1121 "You need MANAGE_USERS and INTERACT_ACROSS_USERS_FULL permission to: " 1122 + message); 1123 } 1124 } 1125 1126 /** 1127 * Enforces that only the system UID or root's UID or apps that have the 1128 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 1129 * permission can make certain calls to the UserManager. 1130 * 1131 * @param message used as message if SecurityException is thrown 1132 * @throws SecurityException if the caller is not system or root 1133 */ 1134 private static final void checkManageUsersPermission(String message) { 1135 final int uid = Binder.getCallingUid(); 1136 if (!UserHandle.isSameApp(uid, Process.SYSTEM_UID) && uid != Process.ROOT_UID 1137 && ActivityManager.checkComponentPermission( 1138 android.Manifest.permission.MANAGE_USERS, 1139 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 1140 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 1141 } 1142 } 1143 1144 /** 1145 * Enforces that only the system UID or root's UID (on any user) can make certain calls to the 1146 * UserManager. 1147 * 1148 * @param message used as message if SecurityException is thrown 1149 * @throws SecurityException if the caller is not system or root 1150 */ 1151 private static void checkSystemOrRoot(String message) { 1152 final int uid = Binder.getCallingUid(); 1153 if (!UserHandle.isSameApp(uid, Process.SYSTEM_UID) && uid != Process.ROOT_UID) { 1154 throw new SecurityException("Only system may: " + message); 1155 } 1156 } 1157 1158 private void writeBitmapLP(UserInfo info, Bitmap bitmap) { 1159 try { 1160 File dir = new File(mUsersDir, Integer.toString(info.id)); 1161 File file = new File(dir, USER_PHOTO_FILENAME); 1162 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 1163 if (!dir.exists()) { 1164 dir.mkdir(); 1165 FileUtils.setPermissions( 1166 dir.getPath(), 1167 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 1168 -1, -1); 1169 } 1170 FileOutputStream os; 1171 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 1172 && tmp.renameTo(file)) { 1173 info.iconPath = file.getAbsolutePath(); 1174 } 1175 try { 1176 os.close(); 1177 } catch (IOException ioe) { 1178 // What the ... ! 1179 } 1180 tmp.delete(); 1181 } catch (FileNotFoundException e) { 1182 Slog.w(LOG_TAG, "Error setting photo for user ", e); 1183 } 1184 } 1185 1186 /** 1187 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 1188 * cache it elsewhere. 1189 * @return the array of user ids. 1190 */ 1191 public int[] getUserIds() { 1192 synchronized (mUsersLock) { 1193 return mUserIds; 1194 } 1195 } 1196 1197 private void readUserListLP() { 1198 if (!mUserListFile.exists()) { 1199 fallbackToSingleUserLP(); 1200 return; 1201 } 1202 FileInputStream fis = null; 1203 AtomicFile userListFile = new AtomicFile(mUserListFile); 1204 try { 1205 fis = userListFile.openRead(); 1206 XmlPullParser parser = Xml.newPullParser(); 1207 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1208 int type; 1209 while ((type = parser.next()) != XmlPullParser.START_TAG 1210 && type != XmlPullParser.END_DOCUMENT) { 1211 ; 1212 } 1213 1214 if (type != XmlPullParser.START_TAG) { 1215 Slog.e(LOG_TAG, "Unable to read user list"); 1216 fallbackToSingleUserLP(); 1217 return; 1218 } 1219 1220 mNextSerialNumber = -1; 1221 if (parser.getName().equals(TAG_USERS)) { 1222 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 1223 if (lastSerialNumber != null) { 1224 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 1225 } 1226 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 1227 if (versionNumber != null) { 1228 mUserVersion = Integer.parseInt(versionNumber); 1229 } 1230 } 1231 1232 final Bundle newDevicePolicyGlobalUserRestrictions = new Bundle(); 1233 1234 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1235 if (type == XmlPullParser.START_TAG) { 1236 final String name = parser.getName(); 1237 if (name.equals(TAG_USER)) { 1238 String id = parser.getAttributeValue(null, ATTR_ID); 1239 Pair<UserInfo, String> userPair = readUserLP(Integer.parseInt(id)); 1240 1241 if (userPair != null) { 1242 UserInfo user = userPair.first; 1243 String account = userPair.second; 1244 synchronized (mUsersLock) { 1245 mUsers.put(user.id, user); 1246 mUserAccounts.put(user.id, account); 1247 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 1248 mNextSerialNumber = user.id + 1; 1249 } 1250 } 1251 } 1252 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 1253 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1254 && type != XmlPullParser.END_TAG) { 1255 if (type == XmlPullParser.START_TAG) { 1256 if (parser.getName().equals(TAG_RESTRICTIONS)) { 1257 synchronized (mGuestRestrictions) { 1258 UserRestrictionsUtils 1259 .readRestrictions(parser, mGuestRestrictions); 1260 } 1261 } else if (parser.getName().equals(TAG_DEVICE_POLICY_RESTRICTIONS) 1262 ) { 1263 UserRestrictionsUtils.readRestrictions(parser, 1264 newDevicePolicyGlobalUserRestrictions); 1265 } 1266 break; 1267 } 1268 } 1269 } 1270 } 1271 } 1272 synchronized (mRestrictionsLock) { 1273 mDevicePolicyGlobalUserRestrictions = newDevicePolicyGlobalUserRestrictions; 1274 } 1275 updateUserIds(); 1276 upgradeIfNecessaryLP(); 1277 } catch (IOException | XmlPullParserException e) { 1278 fallbackToSingleUserLP(); 1279 } finally { 1280 IoUtils.closeQuietly(fis); 1281 } 1282 } 1283 1284 /** 1285 * Upgrade steps between versions, either for fixing bugs or changing the data format. 1286 */ 1287 private void upgradeIfNecessaryLP() { 1288 final int originalVersion = mUserVersion; 1289 int userVersion = mUserVersion; 1290 if (userVersion < 1) { 1291 // Assign a proper name for the owner, if not initialized correctly before 1292 UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM); 1293 if ("Primary".equals(user.name)) { 1294 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 1295 scheduleWriteUser(user); 1296 } 1297 userVersion = 1; 1298 } 1299 1300 if (userVersion < 2) { 1301 // Owner should be marked as initialized 1302 UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM); 1303 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 1304 user.flags |= UserInfo.FLAG_INITIALIZED; 1305 scheduleWriteUser(user); 1306 } 1307 userVersion = 2; 1308 } 1309 1310 1311 if (userVersion < 4) { 1312 userVersion = 4; 1313 } 1314 1315 if (userVersion < 5) { 1316 initDefaultGuestRestrictions(); 1317 userVersion = 5; 1318 } 1319 1320 if (userVersion < 6) { 1321 final boolean splitSystemUser = UserManager.isSplitSystemUser(); 1322 synchronized (mUsersLock) { 1323 for (int i = 0; i < mUsers.size(); i++) { 1324 UserInfo user = mUsers.valueAt(i); 1325 // In non-split mode, only user 0 can have restricted profiles 1326 if (!splitSystemUser && user.isRestricted() 1327 && (user.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID)) { 1328 user.restrictedProfileParentId = UserHandle.USER_SYSTEM; 1329 scheduleWriteUser(user); 1330 } 1331 } 1332 } 1333 userVersion = 6; 1334 } 1335 1336 if (userVersion < USER_VERSION) { 1337 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 1338 + USER_VERSION); 1339 } else { 1340 mUserVersion = userVersion; 1341 1342 if (originalVersion < mUserVersion) { 1343 writeUserListLP(); 1344 } 1345 } 1346 } 1347 1348 private void fallbackToSingleUserLP() { 1349 int flags = UserInfo.FLAG_INITIALIZED; 1350 // In split system user mode, the admin and primary flags are assigned to the first human 1351 // user. 1352 if (!UserManager.isSplitSystemUser()) { 1353 flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY; 1354 } 1355 // Create the system user 1356 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 1357 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 1358 flags); 1359 synchronized (mUsersLock) { 1360 mUsers.put(system.id, system); 1361 } 1362 mNextSerialNumber = MIN_USER_ID; 1363 mUserVersion = USER_VERSION; 1364 1365 Bundle restrictions = new Bundle(); 1366 synchronized (mRestrictionsLock) { 1367 mBaseUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 1368 } 1369 1370 updateUserIds(); 1371 initDefaultGuestRestrictions(); 1372 1373 writeUserListLP(); 1374 writeUserLP(system); 1375 } 1376 1377 private void scheduleWriteUser(UserInfo userInfo) { 1378 if (DBG) { 1379 debug("scheduleWriteUser"); 1380 } 1381 // No need to wrap it within a lock -- worst case, we'll just post the same message 1382 // twice. 1383 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 1384 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 1385 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 1386 } 1387 } 1388 1389 /* 1390 * Writes the user file in this format: 1391 * 1392 * <user flags="20039023" id="0"> 1393 * <name>Primary</name> 1394 * </user> 1395 */ 1396 private void writeUserLP(UserInfo userInfo) { 1397 if (DBG) { 1398 debug("writeUserLP " + userInfo); 1399 } 1400 FileOutputStream fos = null; 1401 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 1402 try { 1403 fos = userFile.startWrite(); 1404 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1405 1406 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1407 final XmlSerializer serializer = new FastXmlSerializer(); 1408 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1409 serializer.startDocument(null, true); 1410 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1411 1412 serializer.startTag(null, TAG_USER); 1413 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 1414 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 1415 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 1416 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 1417 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 1418 Long.toString(userInfo.lastLoggedInTime)); 1419 if (userInfo.iconPath != null) { 1420 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 1421 } 1422 if (userInfo.partial) { 1423 serializer.attribute(null, ATTR_PARTIAL, "true"); 1424 } 1425 if (userInfo.guestToRemove) { 1426 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 1427 } 1428 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 1429 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 1430 Integer.toString(userInfo.profileGroupId)); 1431 } 1432 if (userInfo.restrictedProfileParentId != UserInfo.NO_PROFILE_GROUP_ID) { 1433 serializer.attribute(null, ATTR_RESTRICTED_PROFILE_PARENT_ID, 1434 Integer.toString(userInfo.restrictedProfileParentId)); 1435 } 1436 serializer.startTag(null, TAG_NAME); 1437 serializer.text(userInfo.name); 1438 serializer.endTag(null, TAG_NAME); 1439 synchronized (mRestrictionsLock) { 1440 UserRestrictionsUtils.writeRestrictions(serializer, 1441 mBaseUserRestrictions.get(userInfo.id), TAG_RESTRICTIONS); 1442 UserRestrictionsUtils.writeRestrictions(serializer, 1443 mDevicePolicyLocalUserRestrictions.get(userInfo.id), 1444 TAG_DEVICE_POLICY_RESTRICTIONS); 1445 } 1446 // Update the account field if it is set. 1447 String account; 1448 synchronized (mUsersLock) { 1449 account = mUserAccounts.get(userInfo.id); 1450 } 1451 if (account != null) { 1452 serializer.startTag(null, TAG_ACCOUNT); 1453 serializer.text(account); 1454 serializer.endTag(null, TAG_ACCOUNT); 1455 } 1456 1457 serializer.endTag(null, TAG_USER); 1458 1459 serializer.endDocument(); 1460 userFile.finishWrite(fos); 1461 } catch (Exception ioe) { 1462 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 1463 userFile.failWrite(fos); 1464 } 1465 } 1466 1467 /* 1468 * Writes the user list file in this format: 1469 * 1470 * <users nextSerialNumber="3"> 1471 * <user id="0"></user> 1472 * <user id="2"></user> 1473 * </users> 1474 */ 1475 private void writeUserListLP() { 1476 if (DBG) { 1477 debug("writeUserList"); 1478 } 1479 FileOutputStream fos = null; 1480 AtomicFile userListFile = new AtomicFile(mUserListFile); 1481 try { 1482 fos = userListFile.startWrite(); 1483 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1484 1485 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1486 final XmlSerializer serializer = new FastXmlSerializer(); 1487 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1488 serializer.startDocument(null, true); 1489 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1490 1491 serializer.startTag(null, TAG_USERS); 1492 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 1493 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 1494 1495 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 1496 synchronized (mGuestRestrictions) { 1497 UserRestrictionsUtils 1498 .writeRestrictions(serializer, mGuestRestrictions, TAG_RESTRICTIONS); 1499 } 1500 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 1501 synchronized (mRestrictionsLock) { 1502 UserRestrictionsUtils.writeRestrictions(serializer, 1503 mDevicePolicyGlobalUserRestrictions, TAG_DEVICE_POLICY_RESTRICTIONS); 1504 } 1505 int[] userIdsToWrite; 1506 synchronized (mUsersLock) { 1507 userIdsToWrite = new int[mUsers.size()]; 1508 for (int i = 0; i < userIdsToWrite.length; i++) { 1509 UserInfo user = mUsers.valueAt(i); 1510 userIdsToWrite[i] = user.id; 1511 } 1512 } 1513 for (int id : userIdsToWrite) { 1514 serializer.startTag(null, TAG_USER); 1515 serializer.attribute(null, ATTR_ID, Integer.toString(id)); 1516 serializer.endTag(null, TAG_USER); 1517 } 1518 1519 serializer.endTag(null, TAG_USERS); 1520 1521 serializer.endDocument(); 1522 userListFile.finishWrite(fos); 1523 } catch (Exception e) { 1524 userListFile.failWrite(fos); 1525 Slog.e(LOG_TAG, "Error writing user list"); 1526 } 1527 } 1528 1529 private Pair<UserInfo, String> readUserLP(int id) { 1530 int flags = 0; 1531 int serialNumber = id; 1532 String name = null; 1533 String account = null; 1534 String iconPath = null; 1535 long creationTime = 0L; 1536 long lastLoggedInTime = 0L; 1537 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1538 int restrictedProfileParentId = UserInfo.NO_PROFILE_GROUP_ID; 1539 boolean partial = false; 1540 boolean guestToRemove = false; 1541 Bundle baseRestrictions = new Bundle(); 1542 Bundle localRestrictions = new Bundle(); 1543 1544 FileInputStream fis = null; 1545 try { 1546 AtomicFile userFile = 1547 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1548 fis = userFile.openRead(); 1549 XmlPullParser parser = Xml.newPullParser(); 1550 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1551 int type; 1552 while ((type = parser.next()) != XmlPullParser.START_TAG 1553 && type != XmlPullParser.END_DOCUMENT) { 1554 ; 1555 } 1556 1557 if (type != XmlPullParser.START_TAG) { 1558 Slog.e(LOG_TAG, "Unable to read user " + id); 1559 return null; 1560 } 1561 1562 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1563 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1564 if (storedId != id) { 1565 Slog.e(LOG_TAG, "User id does not match the file name"); 1566 return null; 1567 } 1568 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1569 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1570 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1571 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1572 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1573 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1574 UserInfo.NO_PROFILE_GROUP_ID); 1575 restrictedProfileParentId = readIntAttribute(parser, 1576 ATTR_RESTRICTED_PROFILE_PARENT_ID, UserInfo.NO_PROFILE_GROUP_ID); 1577 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1578 if ("true".equals(valueString)) { 1579 partial = true; 1580 } 1581 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1582 if ("true".equals(valueString)) { 1583 guestToRemove = true; 1584 } 1585 1586 int outerDepth = parser.getDepth(); 1587 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1588 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1589 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1590 continue; 1591 } 1592 String tag = parser.getName(); 1593 if (TAG_NAME.equals(tag)) { 1594 type = parser.next(); 1595 if (type == XmlPullParser.TEXT) { 1596 name = parser.getText(); 1597 } 1598 } else if (TAG_RESTRICTIONS.equals(tag)) { 1599 UserRestrictionsUtils.readRestrictions(parser, baseRestrictions); 1600 } else if (TAG_DEVICE_POLICY_RESTRICTIONS.equals(tag)) { 1601 UserRestrictionsUtils.readRestrictions(parser, localRestrictions); 1602 } else if (TAG_ACCOUNT.equals(tag)) { 1603 type = parser.next(); 1604 if (type == XmlPullParser.TEXT) { 1605 account = parser.getText(); 1606 } 1607 } 1608 } 1609 } 1610 1611 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1612 userInfo.serialNumber = serialNumber; 1613 userInfo.creationTime = creationTime; 1614 userInfo.lastLoggedInTime = lastLoggedInTime; 1615 userInfo.partial = partial; 1616 userInfo.guestToRemove = guestToRemove; 1617 userInfo.profileGroupId = profileGroupId; 1618 userInfo.restrictedProfileParentId = restrictedProfileParentId; 1619 synchronized (mRestrictionsLock) { 1620 mBaseUserRestrictions.put(id, baseRestrictions); 1621 mDevicePolicyLocalUserRestrictions.put(id, localRestrictions); 1622 } 1623 return new Pair<>(userInfo, account); 1624 1625 } catch (IOException ioe) { 1626 } catch (XmlPullParserException pe) { 1627 } finally { 1628 if (fis != null) { 1629 try { 1630 fis.close(); 1631 } catch (IOException e) { 1632 } 1633 } 1634 } 1635 return null; 1636 } 1637 1638 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1639 String valueString = parser.getAttributeValue(null, attr); 1640 if (valueString == null) return defaultValue; 1641 try { 1642 return Integer.parseInt(valueString); 1643 } catch (NumberFormatException nfe) { 1644 return defaultValue; 1645 } 1646 } 1647 1648 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1649 String valueString = parser.getAttributeValue(null, attr); 1650 if (valueString == null) return defaultValue; 1651 try { 1652 return Long.parseLong(valueString); 1653 } catch (NumberFormatException nfe) { 1654 return defaultValue; 1655 } 1656 } 1657 1658 private boolean isPackageInstalled(String pkg, int userId) { 1659 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1660 PackageManager.GET_UNINSTALLED_PACKAGES, 1661 userId); 1662 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1663 return false; 1664 } 1665 return true; 1666 } 1667 1668 /** 1669 * Removes all the restrictions files (res_<packagename>) for a given user. 1670 * Does not do any permissions checking. 1671 */ 1672 private void cleanAppRestrictions(int userId) { 1673 synchronized (mPackagesLock) { 1674 File dir = Environment.getUserSystemDirectory(userId); 1675 String[] files = dir.list(); 1676 if (files == null) return; 1677 for (String fileName : files) { 1678 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1679 File resFile = new File(dir, fileName); 1680 if (resFile.exists()) { 1681 resFile.delete(); 1682 } 1683 } 1684 } 1685 } 1686 } 1687 1688 /** 1689 * Removes the app restrictions file for a specific package and user id, if it exists. 1690 */ 1691 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1692 synchronized (mPackagesLock) { 1693 File dir = Environment.getUserSystemDirectory(userId); 1694 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1695 if (resFile.exists()) { 1696 resFile.delete(); 1697 } 1698 } 1699 } 1700 1701 @Override 1702 public UserInfo createProfileForUser(String name, int flags, int userId) { 1703 checkManageUsersPermission("Only the system can create users"); 1704 return createUserInternal(name, flags, userId); 1705 } 1706 1707 @Override 1708 public UserInfo createUser(String name, int flags) { 1709 checkManageUsersPermission("Only the system can create users"); 1710 return createUserInternal(name, flags, UserHandle.USER_NULL); 1711 } 1712 1713 private UserInfo createUserInternal(String name, int flags, int parentId) { 1714 if (hasUserRestriction(UserManager.DISALLOW_ADD_USER, UserHandle.getCallingUserId())) { 1715 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1716 return null; 1717 } 1718 if (ActivityManager.isLowRamDeviceStatic()) { 1719 return null; 1720 } 1721 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1722 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1723 final boolean isRestricted = (flags & UserInfo.FLAG_RESTRICTED) != 0; 1724 final long ident = Binder.clearCallingIdentity(); 1725 UserInfo userInfo; 1726 final int userId; 1727 try { 1728 synchronized (mPackagesLock) { 1729 UserInfo parent = null; 1730 if (parentId != UserHandle.USER_NULL) { 1731 synchronized (mUsersLock) { 1732 parent = getUserInfoLU(parentId); 1733 } 1734 if (parent == null) return null; 1735 } 1736 if (isManagedProfile && !canAddMoreManagedProfiles(parentId, false)) { 1737 Log.e(LOG_TAG, "Cannot add more managed profiles for user " + parentId); 1738 return null; 1739 } 1740 if (!isGuest && !isManagedProfile && isUserLimitReached()) { 1741 // If we're not adding a guest user or a managed profile and the limit has 1742 // been reached, cannot add a user. 1743 return null; 1744 } 1745 // If we're adding a guest and there already exists one, bail. 1746 if (isGuest && findCurrentGuestUser() != null) { 1747 return null; 1748 } 1749 // In legacy mode, restricted profile's parent can only be the owner user 1750 if (isRestricted && !UserManager.isSplitSystemUser() 1751 && (parentId != UserHandle.USER_SYSTEM)) { 1752 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1753 return null; 1754 } 1755 if (isRestricted && UserManager.isSplitSystemUser()) { 1756 if (parent == null) { 1757 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be " 1758 + "specified"); 1759 return null; 1760 } 1761 if (!parent.canHaveProfile()) { 1762 Log.w(LOG_TAG, "Cannot add restricted profile - profiles cannot be " 1763 + "created for the specified parent user id " + parentId); 1764 return null; 1765 } 1766 } 1767 // In split system user mode, we assign the first human user the primary flag. 1768 // And if there is no device owner, we also assign the admin flag to primary user. 1769 if (UserManager.isSplitSystemUser() 1770 && !isGuest && !isManagedProfile && getPrimaryUser() == null) { 1771 flags |= UserInfo.FLAG_PRIMARY; 1772 synchronized (mUsersLock) { 1773 if (!mIsDeviceManaged) { 1774 flags |= UserInfo.FLAG_ADMIN; 1775 } 1776 } 1777 } 1778 1779 if (parent != null && parent.isEphemeral()) { 1780 flags |= UserInfo.FLAG_EPHEMERAL; 1781 } 1782 userId = getNextAvailableId(); 1783 userInfo = new UserInfo(userId, name, null, flags); 1784 userInfo.serialNumber = mNextSerialNumber++; 1785 long now = System.currentTimeMillis(); 1786 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1787 userInfo.partial = true; 1788 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1789 synchronized (mUsersLock) { 1790 mUsers.put(userId, userInfo); 1791 } 1792 writeUserListLP(); 1793 if (parent != null) { 1794 if (isManagedProfile) { 1795 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1796 parent.profileGroupId = parent.id; 1797 writeUserLP(parent); 1798 } 1799 userInfo.profileGroupId = parent.profileGroupId; 1800 } else if (isRestricted) { 1801 if (parent.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID) { 1802 parent.restrictedProfileParentId = parent.id; 1803 writeUserLP(parent); 1804 } 1805 userInfo.restrictedProfileParentId = parent.restrictedProfileParentId; 1806 } 1807 } 1808 } 1809 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1810 storage.createUserKey(userId, userInfo.serialNumber, userInfo.isEphemeral()); 1811 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1812 final String volumeUuid = vol.getFsUuid(); 1813 try { 1814 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 1815 storage.prepareUserStorage( 1816 volumeUuid, userId, userInfo.serialNumber, userInfo.isEphemeral()); 1817 enforceSerialNumber(userDir, userInfo.serialNumber); 1818 } catch (IOException e) { 1819 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1820 } 1821 } 1822 mPm.createNewUser(userId); 1823 userInfo.partial = false; 1824 synchronized (mPackagesLock) { 1825 writeUserLP(userInfo); 1826 } 1827 updateUserIds(); 1828 Bundle restrictions = new Bundle(); 1829 if (isGuest) { 1830 synchronized (mGuestRestrictions) { 1831 restrictions.putAll(mGuestRestrictions); 1832 } 1833 } 1834 synchronized (mRestrictionsLock) { 1835 mBaseUserRestrictions.append(userId, restrictions); 1836 } 1837 mPm.newUserCreated(userId); 1838 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1839 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 1840 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1841 android.Manifest.permission.MANAGE_USERS); 1842 MetricsLogger.count(mContext, isGuest ? TRON_GUEST_CREATED : TRON_USER_CREATED, 1); 1843 } finally { 1844 Binder.restoreCallingIdentity(ident); 1845 } 1846 return userInfo; 1847 } 1848 1849 /** 1850 * @hide 1851 */ 1852 public UserInfo createRestrictedProfile(String name, int parentUserId) { 1853 checkManageUsersPermission("setupRestrictedProfile"); 1854 final UserInfo user = createProfileForUser(name, UserInfo.FLAG_RESTRICTED, parentUserId); 1855 if (user == null) { 1856 return null; 1857 } 1858 setUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS, true, user.id); 1859 // Change the setting before applying the DISALLOW_SHARE_LOCATION restriction, otherwise 1860 // the putIntForUser() will fail. 1861 android.provider.Settings.Secure.putIntForUser(mContext.getContentResolver(), 1862 android.provider.Settings.Secure.LOCATION_MODE, 1863 android.provider.Settings.Secure.LOCATION_MODE_OFF, user.id); 1864 setUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, true, user.id); 1865 return user; 1866 } 1867 1868 /** 1869 * Find the current guest user. If the Guest user is partial, 1870 * then do not include it in the results as it is about to die. 1871 */ 1872 private UserInfo findCurrentGuestUser() { 1873 synchronized (mUsersLock) { 1874 final int size = mUsers.size(); 1875 for (int i = 0; i < size; i++) { 1876 final UserInfo user = mUsers.valueAt(i); 1877 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1878 return user; 1879 } 1880 } 1881 } 1882 return null; 1883 } 1884 1885 /** 1886 * Mark this guest user for deletion to allow us to create another guest 1887 * and switch to that user before actually removing this guest. 1888 * @param userHandle the userid of the current guest 1889 * @return whether the user could be marked for deletion 1890 */ 1891 public boolean markGuestForDeletion(int userHandle) { 1892 checkManageUsersPermission("Only the system can remove users"); 1893 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1894 UserManager.DISALLOW_REMOVE_USER, false)) { 1895 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1896 return false; 1897 } 1898 1899 long ident = Binder.clearCallingIdentity(); 1900 try { 1901 final UserInfo user; 1902 synchronized (mPackagesLock) { 1903 synchronized (mUsersLock) { 1904 user = mUsers.get(userHandle); 1905 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1906 return false; 1907 } 1908 } 1909 if (!user.isGuest()) { 1910 return false; 1911 } 1912 // We set this to a guest user that is to be removed. This is a temporary state 1913 // where we are allowed to add new Guest users, even if this one is still not 1914 // removed. This user will still show up in getUserInfo() calls. 1915 // If we don't get around to removing this Guest user, it will be purged on next 1916 // startup. 1917 user.guestToRemove = true; 1918 // Mark it as disabled, so that it isn't returned any more when 1919 // profiles are queried. 1920 user.flags |= UserInfo.FLAG_DISABLED; 1921 writeUserLP(user); 1922 } 1923 } finally { 1924 Binder.restoreCallingIdentity(ident); 1925 } 1926 return true; 1927 } 1928 1929 /** 1930 * Removes a user and all data directories created for that user. This method should be called 1931 * after the user's processes have been terminated. 1932 * @param userHandle the user's id 1933 */ 1934 public boolean removeUser(int userHandle) { 1935 checkManageUsersPermission("Only the system can remove users"); 1936 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1937 UserManager.DISALLOW_REMOVE_USER, false)) { 1938 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1939 return false; 1940 } 1941 1942 long ident = Binder.clearCallingIdentity(); 1943 try { 1944 final UserInfo user; 1945 int currentUser = ActivityManager.getCurrentUser(); 1946 if (currentUser == userHandle) { 1947 Log.w(LOG_TAG, "Current user cannot be removed"); 1948 return false; 1949 } 1950 synchronized (mPackagesLock) { 1951 synchronized (mUsersLock) { 1952 user = mUsers.get(userHandle); 1953 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1954 return false; 1955 } 1956 1957 // We remember deleted user IDs to prevent them from being 1958 // reused during the current boot; they can still be reused 1959 // after a reboot. 1960 mRemovingUserIds.put(userHandle, true); 1961 } 1962 1963 try { 1964 mAppOpsService.removeUser(userHandle); 1965 } catch (RemoteException e) { 1966 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1967 } 1968 // Set this to a partially created user, so that the user will be purged 1969 // on next startup, in case the runtime stops now before stopping and 1970 // removing the user completely. 1971 user.partial = true; 1972 // Mark it as disabled, so that it isn't returned any more when 1973 // profiles are queried. 1974 user.flags |= UserInfo.FLAG_DISABLED; 1975 writeUserLP(user); 1976 } 1977 1978 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1979 && user.isManagedProfile()) { 1980 // Send broadcast to notify system that the user removed was a 1981 // managed user. 1982 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1983 } 1984 1985 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1986 int res; 1987 try { 1988 res = ActivityManagerNative.getDefault().stopUser(userHandle, /* force= */ true, 1989 new IStopUserCallback.Stub() { 1990 @Override 1991 public void userStopped(int userId) { 1992 finishRemoveUser(userId); 1993 } 1994 @Override 1995 public void userStopAborted(int userId) { 1996 } 1997 }); 1998 } catch (RemoteException e) { 1999 return false; 2000 } 2001 return res == ActivityManager.USER_OP_SUCCESS; 2002 } finally { 2003 Binder.restoreCallingIdentity(ident); 2004 } 2005 } 2006 2007 void finishRemoveUser(final int userHandle) { 2008 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 2009 // Let other services shutdown any activity and clean up their state before completely 2010 // wiping the user's system directory and removing from the user list 2011 long ident = Binder.clearCallingIdentity(); 2012 try { 2013 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 2014 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 2015 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 2016 android.Manifest.permission.MANAGE_USERS, 2017 2018 new BroadcastReceiver() { 2019 @Override 2020 public void onReceive(Context context, Intent intent) { 2021 if (DBG) { 2022 Slog.i(LOG_TAG, 2023 "USER_REMOVED broadcast sent, cleaning up user data " 2024 + userHandle); 2025 } 2026 new Thread() { 2027 public void run() { 2028 // Clean up any ActivityManager state 2029 LocalServices.getService(ActivityManagerInternal.class) 2030 .onUserRemoved(userHandle); 2031 removeUserState(userHandle); 2032 } 2033 }.start(); 2034 } 2035 }, 2036 2037 null, Activity.RESULT_OK, null, null); 2038 } finally { 2039 Binder.restoreCallingIdentity(ident); 2040 } 2041 } 2042 2043 private void removeUserState(final int userHandle) { 2044 mContext.getSystemService(StorageManager.class).destroyUserKey(userHandle); 2045 // Cleanup package manager settings 2046 mPm.cleanUpUser(this, userHandle); 2047 2048 // Remove this user from the list 2049 synchronized (mUsersLock) { 2050 mUsers.remove(userHandle); 2051 mUserAccounts.delete(userHandle); 2052 mIsUserManaged.delete(userHandle); 2053 } 2054 synchronized (mRestrictionsLock) { 2055 mBaseUserRestrictions.remove(userHandle); 2056 mAppliedUserRestrictions.remove(userHandle); 2057 mCachedEffectiveUserRestrictions.remove(userHandle); 2058 mDevicePolicyLocalUserRestrictions.remove(userHandle); 2059 } 2060 // Remove user file 2061 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 2062 userFile.delete(); 2063 // Update the user list 2064 synchronized (mPackagesLock) { 2065 writeUserListLP(); 2066 } 2067 updateUserIds(); 2068 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 2069 } 2070 2071 private void removeDirectoryRecursive(File parent) { 2072 if (parent.isDirectory()) { 2073 String[] files = parent.list(); 2074 for (String filename : files) { 2075 File child = new File(parent, filename); 2076 removeDirectoryRecursive(child); 2077 } 2078 } 2079 parent.delete(); 2080 } 2081 2082 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 2083 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 2084 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 2085 Intent.FLAG_RECEIVER_FOREGROUND); 2086 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 2087 managedProfileIntent.putExtra(Intent.EXTRA_USER_HANDLE, removedUserId); 2088 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 2089 } 2090 2091 @Override 2092 public Bundle getApplicationRestrictions(String packageName) { 2093 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 2094 } 2095 2096 @Override 2097 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 2098 if (UserHandle.getCallingUserId() != userId 2099 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 2100 checkSystemOrRoot("get application restrictions for other users/apps"); 2101 } 2102 synchronized (mPackagesLock) { 2103 // Read the restrictions from XML 2104 return readApplicationRestrictionsLP(packageName, userId); 2105 } 2106 } 2107 2108 @Override 2109 public void setApplicationRestrictions(String packageName, Bundle restrictions, 2110 int userId) { 2111 checkSystemOrRoot("set application restrictions"); 2112 synchronized (mPackagesLock) { 2113 if (restrictions == null || restrictions.isEmpty()) { 2114 cleanAppRestrictionsForPackage(packageName, userId); 2115 } else { 2116 // Write the restrictions to XML 2117 writeApplicationRestrictionsLP(packageName, restrictions, userId); 2118 } 2119 } 2120 2121 if (isPackageInstalled(packageName, userId)) { 2122 // Notify package of changes via an intent - only sent to explicitly registered receivers. 2123 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 2124 changeIntent.setPackage(packageName); 2125 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 2126 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 2127 } 2128 } 2129 2130 private void unhideAllInstalledAppsForUser(final int userHandle) { 2131 mHandler.post(new Runnable() { 2132 @Override 2133 public void run() { 2134 List<ApplicationInfo> apps = 2135 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 2136 userHandle).getList(); 2137 final long ident = Binder.clearCallingIdentity(); 2138 try { 2139 for (ApplicationInfo appInfo : apps) { 2140 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 2141 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 2142 != 0) { 2143 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 2144 userHandle); 2145 } 2146 } 2147 } finally { 2148 Binder.restoreCallingIdentity(ident); 2149 } 2150 } 2151 }); 2152 } 2153 private int getUidForPackage(String packageName) { 2154 long ident = Binder.clearCallingIdentity(); 2155 try { 2156 return mContext.getPackageManager().getApplicationInfo(packageName, 2157 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 2158 } catch (NameNotFoundException nnfe) { 2159 return -1; 2160 } finally { 2161 Binder.restoreCallingIdentity(ident); 2162 } 2163 } 2164 2165 private Bundle readApplicationRestrictionsLP(String packageName, int userId) { 2166 AtomicFile restrictionsFile = 2167 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 2168 packageToRestrictionsFileName(packageName))); 2169 return readApplicationRestrictionsLP(restrictionsFile); 2170 } 2171 2172 @VisibleForTesting 2173 static Bundle readApplicationRestrictionsLP(AtomicFile restrictionsFile) { 2174 final Bundle restrictions = new Bundle(); 2175 final ArrayList<String> values = new ArrayList<>(); 2176 if (!restrictionsFile.getBaseFile().exists()) { 2177 return restrictions; 2178 } 2179 2180 FileInputStream fis = null; 2181 try { 2182 fis = restrictionsFile.openRead(); 2183 XmlPullParser parser = Xml.newPullParser(); 2184 parser.setInput(fis, StandardCharsets.UTF_8.name()); 2185 XmlUtils.nextElement(parser); 2186 if (parser.getEventType() != XmlPullParser.START_TAG) { 2187 Slog.e(LOG_TAG, "Unable to read restrictions file " 2188 + restrictionsFile.getBaseFile()); 2189 return restrictions; 2190 } 2191 while (parser.next() != XmlPullParser.END_DOCUMENT) { 2192 readEntry(restrictions, values, parser); 2193 } 2194 } catch (IOException|XmlPullParserException e) { 2195 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 2196 } finally { 2197 IoUtils.closeQuietly(fis); 2198 } 2199 return restrictions; 2200 } 2201 2202 private static void readEntry(Bundle restrictions, ArrayList<String> values, 2203 XmlPullParser parser) throws XmlPullParserException, IOException { 2204 int type = parser.getEventType(); 2205 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 2206 String key = parser.getAttributeValue(null, ATTR_KEY); 2207 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 2208 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 2209 if (multiple != null) { 2210 values.clear(); 2211 int count = Integer.parseInt(multiple); 2212 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 2213 if (type == XmlPullParser.START_TAG 2214 && parser.getName().equals(TAG_VALUE)) { 2215 values.add(parser.nextText().trim()); 2216 count--; 2217 } 2218 } 2219 String [] valueStrings = new String[values.size()]; 2220 values.toArray(valueStrings); 2221 restrictions.putStringArray(key, valueStrings); 2222 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 2223 restrictions.putBundle(key, readBundleEntry(parser, values)); 2224 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 2225 final int outerDepth = parser.getDepth(); 2226 ArrayList<Bundle> bundleList = new ArrayList<>(); 2227 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 2228 Bundle childBundle = readBundleEntry(parser, values); 2229 bundleList.add(childBundle); 2230 } 2231 restrictions.putParcelableArray(key, 2232 bundleList.toArray(new Bundle[bundleList.size()])); 2233 } else { 2234 String value = parser.nextText().trim(); 2235 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 2236 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 2237 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 2238 restrictions.putInt(key, Integer.parseInt(value)); 2239 } else { 2240 restrictions.putString(key, value); 2241 } 2242 } 2243 } 2244 } 2245 2246 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 2247 throws IOException, XmlPullParserException { 2248 Bundle childBundle = new Bundle(); 2249 final int outerDepth = parser.getDepth(); 2250 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 2251 readEntry(childBundle, values, parser); 2252 } 2253 return childBundle; 2254 } 2255 2256 private void writeApplicationRestrictionsLP(String packageName, 2257 Bundle restrictions, int userId) { 2258 AtomicFile restrictionsFile = new AtomicFile( 2259 new File(Environment.getUserSystemDirectory(userId), 2260 packageToRestrictionsFileName(packageName))); 2261 writeApplicationRestrictionsLP(restrictions, restrictionsFile); 2262 } 2263 2264 @VisibleForTesting 2265 static void writeApplicationRestrictionsLP(Bundle restrictions, AtomicFile restrictionsFile) { 2266 FileOutputStream fos = null; 2267 try { 2268 fos = restrictionsFile.startWrite(); 2269 final BufferedOutputStream bos = new BufferedOutputStream(fos); 2270 2271 final XmlSerializer serializer = new FastXmlSerializer(); 2272 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 2273 serializer.startDocument(null, true); 2274 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 2275 2276 serializer.startTag(null, TAG_RESTRICTIONS); 2277 writeBundle(restrictions, serializer); 2278 serializer.endTag(null, TAG_RESTRICTIONS); 2279 2280 serializer.endDocument(); 2281 restrictionsFile.finishWrite(fos); 2282 } catch (Exception e) { 2283 restrictionsFile.failWrite(fos); 2284 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 2285 } 2286 } 2287 2288 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 2289 throws IOException { 2290 for (String key : restrictions.keySet()) { 2291 Object value = restrictions.get(key); 2292 serializer.startTag(null, TAG_ENTRY); 2293 serializer.attribute(null, ATTR_KEY, key); 2294 2295 if (value instanceof Boolean) { 2296 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 2297 serializer.text(value.toString()); 2298 } else if (value instanceof Integer) { 2299 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 2300 serializer.text(value.toString()); 2301 } else if (value == null || value instanceof String) { 2302 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 2303 serializer.text(value != null ? (String) value : ""); 2304 } else if (value instanceof Bundle) { 2305 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 2306 writeBundle((Bundle) value, serializer); 2307 } else if (value instanceof Parcelable[]) { 2308 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 2309 Parcelable[] array = (Parcelable[]) value; 2310 for (Parcelable parcelable : array) { 2311 if (!(parcelable instanceof Bundle)) { 2312 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 2313 } 2314 serializer.startTag(null, TAG_ENTRY); 2315 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 2316 writeBundle((Bundle) parcelable, serializer); 2317 serializer.endTag(null, TAG_ENTRY); 2318 } 2319 } else { 2320 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 2321 String[] values = (String[]) value; 2322 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 2323 for (String choice : values) { 2324 serializer.startTag(null, TAG_VALUE); 2325 serializer.text(choice != null ? choice : ""); 2326 serializer.endTag(null, TAG_VALUE); 2327 } 2328 } 2329 serializer.endTag(null, TAG_ENTRY); 2330 } 2331 } 2332 2333 @Override 2334 public int getUserSerialNumber(int userHandle) { 2335 synchronized (mUsersLock) { 2336 if (!exists(userHandle)) return -1; 2337 return getUserInfoLU(userHandle).serialNumber; 2338 } 2339 } 2340 2341 @Override 2342 public int getUserHandle(int userSerialNumber) { 2343 synchronized (mUsersLock) { 2344 for (int userId : mUserIds) { 2345 UserInfo info = getUserInfoLU(userId); 2346 if (info != null && info.serialNumber == userSerialNumber) return userId; 2347 } 2348 // Not found 2349 return -1; 2350 } 2351 } 2352 2353 @Override 2354 public long getUserCreationTime(int userHandle) { 2355 int callingUserId = UserHandle.getCallingUserId(); 2356 UserInfo userInfo = null; 2357 synchronized (mUsersLock) { 2358 if (callingUserId == userHandle) { 2359 userInfo = getUserInfoLU(userHandle); 2360 } else { 2361 UserInfo parent = getProfileParentLU(userHandle); 2362 if (parent != null && parent.id == callingUserId) { 2363 userInfo = getUserInfoLU(userHandle); 2364 } 2365 } 2366 } 2367 if (userInfo == null) { 2368 throw new SecurityException("userHandle can only be the calling user or a managed " 2369 + "profile associated with this user"); 2370 } 2371 return userInfo.creationTime; 2372 } 2373 2374 /** 2375 * Caches the list of user ids in an array, adjusting the array size when necessary. 2376 */ 2377 private void updateUserIds() { 2378 int num = 0; 2379 synchronized (mUsersLock) { 2380 final int userSize = mUsers.size(); 2381 for (int i = 0; i < userSize; i++) { 2382 if (!mUsers.valueAt(i).partial) { 2383 num++; 2384 } 2385 } 2386 final int[] newUsers = new int[num]; 2387 int n = 0; 2388 for (int i = 0; i < userSize; i++) { 2389 if (!mUsers.valueAt(i).partial) { 2390 newUsers[n++] = mUsers.keyAt(i); 2391 } 2392 } 2393 mUserIds = newUsers; 2394 } 2395 } 2396 2397 /** 2398 * Called right before a user is started. This gives us a chance to prepare 2399 * app storage and apply any user restrictions. 2400 */ 2401 public void onBeforeStartUser(int userId) { 2402 mPm.reconcileAppsData(userId, Installer.FLAG_DE_STORAGE); 2403 2404 if (userId != UserHandle.USER_SYSTEM) { 2405 synchronized (mRestrictionsLock) { 2406 applyUserRestrictionsLR(userId); 2407 } 2408 } 2409 } 2410 2411 /** 2412 * Called right before a user is unlocked. This gives us a chance to prepare 2413 * app storage. 2414 */ 2415 public void onBeforeUnlockUser(int userId) { 2416 mPm.reconcileAppsData(userId, Installer.FLAG_CE_STORAGE); 2417 } 2418 2419 /** 2420 * Make a note of the last started time of a user and do some cleanup. 2421 * @param userId the user that was just foregrounded 2422 */ 2423 public void onUserForeground(int userId) { 2424 UserInfo user = getUserInfoNoChecks(userId); 2425 if (user == null || user.partial) { 2426 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 2427 return; 2428 } 2429 long now = System.currentTimeMillis(); 2430 if (now > EPOCH_PLUS_30_YEARS) { 2431 user.lastLoggedInTime = now; 2432 scheduleWriteUser(user); 2433 } 2434 } 2435 2436 /** 2437 * Returns the next available user id, filling in any holes in the ids. 2438 * TODO: May not be a good idea to recycle ids, in case it results in confusion 2439 * for data and battery stats collection, or unexpected cross-talk. 2440 */ 2441 private int getNextAvailableId() { 2442 synchronized (mUsersLock) { 2443 int i = MIN_USER_ID; 2444 while (i < MAX_USER_ID) { 2445 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 2446 return i; 2447 } 2448 i++; 2449 } 2450 } 2451 throw new IllegalStateException("No user id available!"); 2452 } 2453 2454 private String packageToRestrictionsFileName(String packageName) { 2455 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 2456 } 2457 2458 /** 2459 * Enforce that serial number stored in user directory inode matches the 2460 * given expected value. Gracefully sets the serial number if currently 2461 * undefined. 2462 * 2463 * @throws IOException when problem extracting serial number, or serial 2464 * number is mismatched. 2465 */ 2466 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 2467 final int foundSerial = getSerialNumber(file); 2468 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 2469 2470 if (foundSerial == -1) { 2471 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 2472 try { 2473 setSerialNumber(file, serialNumber); 2474 } catch (IOException e) { 2475 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 2476 } 2477 2478 } else if (foundSerial != serialNumber) { 2479 throw new IOException("Found serial number " + foundSerial 2480 + " doesn't match expected " + serialNumber); 2481 } 2482 } 2483 2484 /** 2485 * Set serial number stored in user directory inode. 2486 * 2487 * @throws IOException if serial number was already set 2488 */ 2489 private static void setSerialNumber(File file, int serialNumber) 2490 throws IOException { 2491 try { 2492 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 2493 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 2494 } catch (ErrnoException e) { 2495 throw e.rethrowAsIOException(); 2496 } 2497 } 2498 2499 /** 2500 * Return serial number stored in user directory inode. 2501 * 2502 * @return parsed serial number, or -1 if not set 2503 */ 2504 private static int getSerialNumber(File file) throws IOException { 2505 try { 2506 final byte[] buf = new byte[256]; 2507 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 2508 final String serial = new String(buf, 0, len); 2509 try { 2510 return Integer.parseInt(serial); 2511 } catch (NumberFormatException e) { 2512 throw new IOException("Bad serial number: " + serial); 2513 } 2514 } catch (ErrnoException e) { 2515 if (e.errno == OsConstants.ENODATA) { 2516 return -1; 2517 } else { 2518 throw e.rethrowAsIOException(); 2519 } 2520 } 2521 } 2522 2523 @Override 2524 public void onShellCommand(FileDescriptor in, FileDescriptor out, 2525 FileDescriptor err, String[] args, ResultReceiver resultReceiver) { 2526 (new Shell()).exec(this, in, out, err, args, resultReceiver); 2527 } 2528 2529 int onShellCommand(Shell shell, String cmd) { 2530 if (cmd == null) { 2531 return shell.handleDefaultCommands(cmd); 2532 } 2533 2534 final PrintWriter pw = shell.getOutPrintWriter(); 2535 try { 2536 switch(cmd) { 2537 case "list": 2538 return runList(pw); 2539 } 2540 } catch (RemoteException e) { 2541 pw.println("Remote exception: " + e); 2542 } 2543 return -1; 2544 } 2545 2546 private int runList(PrintWriter pw) throws RemoteException { 2547 final IActivityManager am = ActivityManagerNative.getDefault(); 2548 final List<UserInfo> users = getUsers(false); 2549 if (users == null) { 2550 pw.println("Error: couldn't get users"); 2551 return 1; 2552 } else { 2553 pw.println("Users:"); 2554 for (int i = 0; i < users.size(); i++) { 2555 String running = am.isUserRunning(users.get(i).id, 0) ? " running" : ""; 2556 pw.println("\t" + users.get(i).toString() + running); 2557 } 2558 return 0; 2559 } 2560 } 2561 2562 @Override 2563 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2564 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 2565 != PackageManager.PERMISSION_GRANTED) { 2566 pw.println("Permission Denial: can't dump UserManager from from pid=" 2567 + Binder.getCallingPid() 2568 + ", uid=" + Binder.getCallingUid() 2569 + " without permission " 2570 + android.Manifest.permission.DUMP); 2571 return; 2572 } 2573 2574 long now = System.currentTimeMillis(); 2575 StringBuilder sb = new StringBuilder(); 2576 synchronized (mPackagesLock) { 2577 synchronized (mUsersLock) { 2578 pw.println("Users:"); 2579 for (int i = 0; i < mUsers.size(); i++) { 2580 UserInfo user = mUsers.valueAt(i); 2581 if (user == null) { 2582 continue; 2583 } 2584 final int userId = user.id; 2585 pw.print(" "); pw.print(user); 2586 pw.print(" serialNo="); pw.print(user.serialNumber); 2587 if (mRemovingUserIds.get(userId)) { 2588 pw.print(" <removing> "); 2589 } 2590 if (user.partial) { 2591 pw.print(" <partial>"); 2592 } 2593 pw.println(); 2594 pw.print(" Created: "); 2595 if (user.creationTime == 0) { 2596 pw.println("<unknown>"); 2597 } else { 2598 sb.setLength(0); 2599 TimeUtils.formatDuration(now - user.creationTime, sb); 2600 sb.append(" ago"); 2601 pw.println(sb); 2602 } 2603 pw.print(" Last logged in: "); 2604 if (user.lastLoggedInTime == 0) { 2605 pw.println("<unknown>"); 2606 } else { 2607 sb.setLength(0); 2608 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2609 sb.append(" ago"); 2610 pw.println(sb); 2611 } 2612 pw.print(" Has profile owner: "); 2613 pw.println(mIsUserManaged.get(userId)); 2614 pw.println(" Restrictions:"); 2615 synchronized (mRestrictionsLock) { 2616 UserRestrictionsUtils.dumpRestrictions( 2617 pw, " ", mBaseUserRestrictions.get(user.id)); 2618 pw.println(" Device policy local restrictions:"); 2619 UserRestrictionsUtils.dumpRestrictions( 2620 pw, " ", mDevicePolicyLocalUserRestrictions.get(user.id)); 2621 pw.println(" Effective restrictions:"); 2622 UserRestrictionsUtils.dumpRestrictions( 2623 pw, " ", mCachedEffectiveUserRestrictions.get(user.id)); 2624 } 2625 pw.println(); 2626 String accountName = mUserAccounts.get(userId); 2627 if (accountName != null) { 2628 pw.print(" Account name: " + accountName); 2629 pw.println(); 2630 } 2631 } 2632 } 2633 pw.println(" Device policy global restrictions:"); 2634 synchronized (mRestrictionsLock) { 2635 UserRestrictionsUtils 2636 .dumpRestrictions(pw, " ", mDevicePolicyGlobalUserRestrictions); 2637 } 2638 pw.println(); 2639 pw.println(" Guest restrictions:"); 2640 synchronized (mGuestRestrictions) { 2641 UserRestrictionsUtils.dumpRestrictions(pw, " ", mGuestRestrictions); 2642 } 2643 synchronized (mUsersLock) { 2644 pw.println(); 2645 pw.println(" Device managed: " + mIsDeviceManaged); 2646 } 2647 } 2648 } 2649 2650 final class MainHandler extends Handler { 2651 2652 @Override 2653 public void handleMessage(Message msg) { 2654 switch (msg.what) { 2655 case WRITE_USER_MSG: 2656 removeMessages(WRITE_USER_MSG, msg.obj); 2657 synchronized (mPackagesLock) { 2658 int userId = ((UserInfo) msg.obj).id; 2659 UserInfo userInfo = getUserInfoNoChecks(userId); 2660 if (userInfo != null) { 2661 writeUserLP(userInfo); 2662 } 2663 } 2664 } 2665 } 2666 } 2667 2668 /** 2669 * @param userId 2670 * @return whether the user has been initialized yet 2671 */ 2672 boolean isInitialized(int userId) { 2673 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2674 } 2675 2676 private class LocalService extends UserManagerInternal { 2677 @Override 2678 public void setDevicePolicyUserRestrictions(int userId, @NonNull Bundle localRestrictions, 2679 @Nullable Bundle globalRestrictions) { 2680 UserManagerService.this.setDevicePolicyUserRestrictions(userId, localRestrictions, 2681 globalRestrictions); 2682 } 2683 2684 @Override 2685 public Bundle getBaseUserRestrictions(int userId) { 2686 synchronized (mRestrictionsLock) { 2687 return mBaseUserRestrictions.get(userId); 2688 } 2689 } 2690 2691 @Override 2692 public void setBaseUserRestrictionsByDpmsForMigration( 2693 int userId, Bundle baseRestrictions) { 2694 synchronized (mRestrictionsLock) { 2695 mBaseUserRestrictions.put(userId, new Bundle(baseRestrictions)); 2696 invalidateEffectiveUserRestrictionsLR(userId); 2697 } 2698 2699 final UserInfo userInfo = getUserInfoNoChecks(userId); 2700 synchronized (mPackagesLock) { 2701 if (userInfo != null) { 2702 writeUserLP(userInfo); 2703 } else { 2704 Slog.w(LOG_TAG, "UserInfo not found for " + userId); 2705 } 2706 } 2707 } 2708 2709 @Override 2710 public boolean getUserRestriction(int userId, String key) { 2711 return getUserRestrictions(userId).getBoolean(key); 2712 } 2713 2714 @Override 2715 public void addUserRestrictionsListener(UserRestrictionsListener listener) { 2716 synchronized (mUserRestrictionsListeners) { 2717 mUserRestrictionsListeners.add(listener); 2718 } 2719 } 2720 2721 @Override 2722 public void removeUserRestrictionsListener(UserRestrictionsListener listener) { 2723 synchronized (mUserRestrictionsListeners) { 2724 mUserRestrictionsListeners.remove(listener); 2725 } 2726 } 2727 2728 @Override 2729 public void setDeviceManaged(boolean isManaged) { 2730 synchronized (mUsersLock) { 2731 mIsDeviceManaged = isManaged; 2732 } 2733 } 2734 2735 @Override 2736 public void setUserManaged(int userId, boolean isManaged) { 2737 synchronized (mUsersLock) { 2738 mIsUserManaged.put(userId, isManaged); 2739 } 2740 } 2741 } 2742 2743 private class Shell extends ShellCommand { 2744 @Override 2745 public int onCommand(String cmd) { 2746 return onShellCommand(this, cmd); 2747 } 2748 2749 @Override 2750 public void onHelp() { 2751 final PrintWriter pw = getOutPrintWriter(); 2752 pw.println("User manager (user) commands:"); 2753 pw.println(" help"); 2754 pw.println(" Print this help text."); 2755 pw.println(""); 2756 pw.println(" list"); 2757 pw.println(" Prints all users on the system."); 2758 } 2759 } 2760 2761 private static void debug(String message) { 2762 Log.d(LOG_TAG, message + 2763 (DBG_WITH_STACKTRACE ? " called at\n" + Debug.getCallers(10, " ") : "")); 2764 } 2765} 2766