UserManagerService.java revision 8385e4b9d27c5139c643f078a5f94a49f91f2523
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; 78 79import org.xmlpull.v1.XmlPullParser; 80import org.xmlpull.v1.XmlPullParserException; 81import org.xmlpull.v1.XmlSerializer; 82 83import java.io.BufferedOutputStream; 84import java.io.File; 85import java.io.FileDescriptor; 86import java.io.FileInputStream; 87import java.io.FileNotFoundException; 88import java.io.FileOutputStream; 89import java.io.IOException; 90import java.io.PrintWriter; 91import java.nio.charset.StandardCharsets; 92import java.util.ArrayList; 93import java.util.List; 94 95import libcore.io.IoUtils; 96import libcore.util.Objects; 97 98/** 99 * Service for {@link UserManager}. 100 * 101 * Method naming convention: 102 * <ul> 103 * <li> Methods suffixed with "LP" should be called within the {@link #mPackagesLock} lock. 104 * <li> Methods suffixed with "LR" should be called within the {@link #mRestrictionsLock} lock. 105 * <li> Methods suffixed with "LU" should be called within the {@link #mUsersLock} lock. 106 * </ul> 107 */ 108public class UserManagerService extends IUserManager.Stub { 109 private static final String LOG_TAG = "UserManagerService"; 110 static final boolean DBG = false; // DO NOT SUBMIT WITH TRUE 111 private static final boolean DBG_WITH_STACKTRACE = false; // DO NOT SUBMIT WITH TRUE 112 113 private static final String TAG_NAME = "name"; 114 private static final String TAG_ACCOUNT = "account"; 115 private static final String ATTR_FLAGS = "flags"; 116 private static final String ATTR_ICON_PATH = "icon"; 117 private static final String ATTR_ID = "id"; 118 private static final String ATTR_CREATION_TIME = "created"; 119 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 120 private static final String ATTR_SERIAL_NO = "serialNumber"; 121 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 122 private static final String ATTR_PARTIAL = "partial"; 123 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 124 private static final String ATTR_USER_VERSION = "version"; 125 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 126 private static final String ATTR_RESTRICTED_PROFILE_PARENT_ID = "restrictedProfileParentId"; 127 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 128 private static final String TAG_USERS = "users"; 129 private static final String TAG_USER = "user"; 130 private static final String TAG_RESTRICTIONS = "restrictions"; 131 private static final String TAG_DEVICE_POLICY_RESTRICTIONS = "device_policy_restrictions"; 132 private static final String TAG_ENTRY = "entry"; 133 private static final String TAG_VALUE = "value"; 134 private static final String ATTR_KEY = "key"; 135 private static final String ATTR_VALUE_TYPE = "type"; 136 private static final String ATTR_MULTIPLE = "m"; 137 138 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 139 private static final String ATTR_TYPE_STRING = "s"; 140 private static final String ATTR_TYPE_BOOLEAN = "b"; 141 private static final String ATTR_TYPE_INTEGER = "i"; 142 private static final String ATTR_TYPE_BUNDLE = "B"; 143 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 144 145 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 146 private static final String USER_LIST_FILENAME = "userlist.xml"; 147 private static final String USER_PHOTO_FILENAME = "photo.png"; 148 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 149 150 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 151 private static final String XML_SUFFIX = ".xml"; 152 153 private static final int MIN_USER_ID = 10; 154 // We need to keep process uid within Integer.MAX_VALUE. 155 private static final int MAX_USER_ID = Integer.MAX_VALUE / UserHandle.PER_USER_RANGE; 156 157 private static final int USER_VERSION = 6; 158 159 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 160 161 // Maximum number of managed profiles permitted per user is 1. This cannot be increased 162 // without first making sure that the rest of the framework is prepared for it. 163 private static final int MAX_MANAGED_PROFILES = 1; 164 165 static final int WRITE_USER_MSG = 1; 166 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 167 168 private static final String XATTR_SERIAL = "user.serial"; 169 170 // Tron counters 171 private static final String TRON_GUEST_CREATED = "users_guest_created"; 172 private static final String TRON_USER_CREATED = "users_user_created"; 173 174 private final Context mContext; 175 private final PackageManagerService mPm; 176 private final Object mPackagesLock; 177 // Short-term lock for internal state, when interaction/sync with PM is not required 178 private final Object mUsersLock = new Object(); 179 private final Object mRestrictionsLock = new Object(); 180 181 private final Handler mHandler; 182 183 private final File mUsersDir; 184 private final File mUserListFile; 185 186 @GuardedBy("mUsersLock") 187 private final SparseArray<UserInfo> mUsers = new SparseArray<>(); 188 189 /** 190 * This collection contains each user's account name if the user chose to set one up 191 * during the initial user creation process. Keeping this information separate from mUsers 192 * to avoid accidentally leak it. 193 */ 194 @GuardedBy("mUsersLock") 195 private final SparseArray<String> mUserAccounts = new SparseArray<>(); 196 197 /** 198 * User restrictions set via UserManager. This doesn't include restrictions set by 199 * device owner / profile owners. 200 * 201 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 202 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 203 * maybe shared between {@link #mBaseUserRestrictions} and 204 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 205 * (Otherwise we won't be able to detect what restrictions have changed in 206 * {@link #updateUserRestrictionsInternalLR}. 207 */ 208 @GuardedBy("mRestrictionsLock") 209 private final SparseArray<Bundle> mBaseUserRestrictions = new SparseArray<>(); 210 211 /** 212 * Cached user restrictions that are in effect -- i.e. {@link #mBaseUserRestrictions} combined 213 * with device / profile owner restrictions. We'll initialize it lazily; use 214 * {@link #getEffectiveUserRestrictions} to access it. 215 * 216 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 217 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 218 * maybe shared between {@link #mBaseUserRestrictions} and 219 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 220 * (Otherwise we won't be able to detect what restrictions have changed in 221 * {@link #updateUserRestrictionsInternalLR}. 222 */ 223 @GuardedBy("mRestrictionsLock") 224 private final SparseArray<Bundle> mCachedEffectiveUserRestrictions = new SparseArray<>(); 225 226 /** 227 * User restrictions that have already been applied in 228 * {@link #updateUserRestrictionsInternalLR(Bundle, int)}. We use it to detect restrictions 229 * that have changed since the last 230 * {@link #updateUserRestrictionsInternalLR(Bundle, int)} call. 231 */ 232 @GuardedBy("mRestrictionsLock") 233 private final SparseArray<Bundle> mAppliedUserRestrictions = new SparseArray<>(); 234 235 /** 236 * User restrictions set by {@link com.android.server.devicepolicy.DevicePolicyManagerService} 237 * that should be applied to all users, including guests. 238 */ 239 @GuardedBy("mRestrictionsLock") 240 private Bundle mDevicePolicyGlobalUserRestrictions; 241 242 /** 243 * User restrictions set by {@link com.android.server.devicepolicy.DevicePolicyManagerService} 244 * for each user. 245 */ 246 @GuardedBy("mRestrictionsLock") 247 private final SparseArray<Bundle> mDevicePolicyLocalUserRestrictions = new SparseArray<>(); 248 249 @GuardedBy("mGuestRestrictions") 250 private final Bundle mGuestRestrictions = new Bundle(); 251 252 /** 253 * Set of user IDs being actively removed. Removed IDs linger in this set 254 * for several seconds to work around a VFS caching issue. 255 */ 256 @GuardedBy("mUsersLock") 257 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 258 259 @GuardedBy("mUsersLock") 260 private int[] mUserIds; 261 @GuardedBy("mPackagesLock") 262 private int mNextSerialNumber; 263 private int mUserVersion = 0; 264 265 private IAppOpsService mAppOpsService; 266 267 private final LocalService mLocalService; 268 269 @GuardedBy("mUsersLock") 270 private boolean mIsDeviceManaged; 271 272 @GuardedBy("mUsersLock") 273 private final SparseBooleanArray mIsUserManaged = new SparseBooleanArray(); 274 275 @GuardedBy("mUserRestrictionsListeners") 276 private final ArrayList<UserRestrictionsListener> mUserRestrictionsListeners = 277 new ArrayList<>(); 278 279 private static UserManagerService sInstance; 280 281 public static UserManagerService getInstance() { 282 synchronized (UserManagerService.class) { 283 return sInstance; 284 } 285 } 286 287 @VisibleForTesting 288 UserManagerService(File dataDir) { 289 this(null, null, new Object(), dataDir); 290 } 291 292 /** 293 * Called by package manager to create the service. This is closely 294 * associated with the package manager, and the given lock is the 295 * package manager's own lock. 296 */ 297 UserManagerService(Context context, PackageManagerService pm, Object packagesLock) { 298 this(context, pm, packagesLock, Environment.getDataDirectory()); 299 } 300 301 private UserManagerService(Context context, PackageManagerService pm, 302 Object packagesLock, File dataDir) { 303 mContext = context; 304 mPm = pm; 305 mPackagesLock = packagesLock; 306 mHandler = new MainHandler(); 307 synchronized (mPackagesLock) { 308 mUsersDir = new File(dataDir, USER_INFO_DIR); 309 mUsersDir.mkdirs(); 310 // Make zeroth user directory, for services to migrate their files to that location 311 File userZeroDir = new File(mUsersDir, String.valueOf(UserHandle.USER_SYSTEM)); 312 userZeroDir.mkdirs(); 313 FileUtils.setPermissions(mUsersDir.toString(), 314 FileUtils.S_IRWXU | FileUtils.S_IRWXG | FileUtils.S_IROTH | FileUtils.S_IXOTH, 315 -1, -1); 316 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 317 initDefaultGuestRestrictions(); 318 readUserListLP(); 319 sInstance = this; 320 } 321 mLocalService = new LocalService(); 322 LocalServices.addService(UserManagerInternal.class, mLocalService); 323 } 324 325 void systemReady() { 326 // Prune out any partially created, partially removed and ephemeral users. 327 ArrayList<UserInfo> partials = new ArrayList<>(); 328 synchronized (mUsersLock) { 329 final int userSize = mUsers.size(); 330 for (int i = 0; i < userSize; i++) { 331 UserInfo ui = mUsers.valueAt(i); 332 if ((ui.partial || ui.guestToRemove || ui.isEphemeral()) && i != 0) { 333 partials.add(ui); 334 } 335 } 336 } 337 final int partialsSize = partials.size(); 338 for (int i = 0; i < partialsSize; i++) { 339 UserInfo ui = partials.get(i); 340 Slog.w(LOG_TAG, "Removing partially created user " + ui.id 341 + " (name=" + ui.name + ")"); 342 removeUserState(ui.id); 343 } 344 345 onUserForeground(UserHandle.USER_SYSTEM); 346 347 mAppOpsService = IAppOpsService.Stub.asInterface( 348 ServiceManager.getService(Context.APP_OPS_SERVICE)); 349 350 synchronized (mRestrictionsLock) { 351 applyUserRestrictionsLR(UserHandle.USER_SYSTEM); 352 } 353 } 354 355 @Override 356 public String getUserAccount(int userId) { 357 checkManageUserAndAcrossUsersFullPermission("get user account"); 358 synchronized (mUsersLock) { 359 return mUserAccounts.get(userId); 360 } 361 } 362 363 @Override 364 public void setUserAccount(int userId, String accountName) { 365 checkManageUserAndAcrossUsersFullPermission("set user account"); 366 UserInfo userToUpdate = null; 367 synchronized (mPackagesLock) { 368 synchronized (mUsersLock) { 369 String currentAccount = mUserAccounts.get(userId); 370 if (!Objects.equal(currentAccount, accountName)) { 371 mUserAccounts.put(userId, accountName); 372 userToUpdate = mUsers.get(userId); 373 } 374 } 375 376 if (userToUpdate != null) { 377 writeUserLP(userToUpdate); 378 } 379 } 380 } 381 382 @Override 383 public UserInfo getPrimaryUser() { 384 checkManageUsersPermission("query users"); 385 synchronized (mUsersLock) { 386 final int userSize = mUsers.size(); 387 for (int i = 0; i < userSize; i++) { 388 UserInfo ui = mUsers.valueAt(i); 389 if (ui.isPrimary() && !mRemovingUserIds.get(ui.id)) { 390 return ui; 391 } 392 } 393 } 394 return null; 395 } 396 397 @Override 398 public @NonNull List<UserInfo> getUsers(boolean excludeDying) { 399 checkManageUsersPermission("query users"); 400 synchronized (mUsersLock) { 401 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 402 final int userSize = mUsers.size(); 403 for (int i = 0; i < userSize; i++) { 404 UserInfo ui = mUsers.valueAt(i); 405 if (ui.partial) { 406 continue; 407 } 408 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 409 users.add(ui); 410 } 411 } 412 return users; 413 } 414 } 415 416 @Override 417 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 418 if (userId != UserHandle.getCallingUserId()) { 419 checkManageUsersPermission("getting profiles related to user " + userId); 420 } 421 final long ident = Binder.clearCallingIdentity(); 422 try { 423 synchronized (mUsersLock) { 424 return getProfilesLU(userId, enabledOnly); 425 } 426 } finally { 427 Binder.restoreCallingIdentity(ident); 428 } 429 } 430 431 /** Assume permissions already checked and caller's identity cleared */ 432 private List<UserInfo> getProfilesLU(int userId, boolean enabledOnly) { 433 UserInfo user = getUserInfoLU(userId); 434 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 435 if (user == null) { 436 // Probably a dying user 437 return users; 438 } 439 final int userSize = mUsers.size(); 440 for (int i = 0; i < userSize; i++) { 441 UserInfo profile = mUsers.valueAt(i); 442 if (!isProfileOf(user, profile)) { 443 continue; 444 } 445 if (enabledOnly && !profile.isEnabled()) { 446 continue; 447 } 448 if (mRemovingUserIds.get(profile.id)) { 449 continue; 450 } 451 users.add(profile); 452 } 453 return users; 454 } 455 456 @Override 457 public int getCredentialOwnerProfile(int userHandle) { 458 checkManageUsersPermission("get the credential owner"); 459 if (!LockPatternUtils.isSeparateWorkChallengeEnabled()) { 460 synchronized (mUsersLock) { 461 UserInfo profileParent = getProfileParentLU(userHandle); 462 if (profileParent != null) { 463 return profileParent.id; 464 } 465 } 466 } 467 468 return userHandle; 469 } 470 471 @Override 472 public boolean isSameProfileGroup(int userId, int otherUserId) { 473 if (userId == otherUserId) return true; 474 checkManageUsersPermission("check if in the same profile group"); 475 synchronized (mPackagesLock) { 476 return isSameProfileGroupLP(userId, otherUserId); 477 } 478 } 479 480 private boolean isSameProfileGroupLP(int userId, int otherUserId) { 481 synchronized (mUsersLock) { 482 UserInfo userInfo = getUserInfoLU(userId); 483 if (userInfo == null || userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 484 return false; 485 } 486 UserInfo otherUserInfo = getUserInfoLU(otherUserId); 487 if (otherUserInfo == null 488 || otherUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 489 return false; 490 } 491 return userInfo.profileGroupId == otherUserInfo.profileGroupId; 492 } 493 } 494 495 @Override 496 public UserInfo getProfileParent(int userHandle) { 497 checkManageUsersPermission("get the profile parent"); 498 synchronized (mUsersLock) { 499 return getProfileParentLU(userHandle); 500 } 501 } 502 503 private UserInfo getProfileParentLU(int userHandle) { 504 UserInfo profile = getUserInfoLU(userHandle); 505 if (profile == null) { 506 return null; 507 } 508 int parentUserId = profile.profileGroupId; 509 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 510 return null; 511 } else { 512 return getUserInfoLU(parentUserId); 513 } 514 } 515 516 private static boolean isProfileOf(UserInfo user, UserInfo profile) { 517 return user.id == profile.id || 518 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 519 && user.profileGroupId == profile.profileGroupId); 520 } 521 522 private void broadcastProfileAvailabilityChanges(UserHandle profileHandle, 523 UserHandle parentHandle, Bundle extras) { 524 // Send intent to profile 525 Intent intent = new Intent(Intent.ACTION_AVAILABILITY_CHANGED); 526 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 527 intent.putExtras(extras); 528 mContext.sendBroadcastAsUser(intent, profileHandle); 529 530 // Send intent to parent 531 if (parentHandle != null) { 532 intent = new Intent(Intent.ACTION_MANAGED_PROFILE_AVAILABILITY_CHANGED); 533 intent.putExtra(Intent.EXTRA_USER, profileHandle); 534 intent.putExtra(Intent.EXTRA_USER_HANDLE, profileHandle.getIdentifier()); 535 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 536 intent.putExtras(extras); 537 mContext.sendBroadcastAsUser(intent, parentHandle); 538 } 539 } 540 541 @Override 542 public void setQuietModeEnabled(int userHandle, boolean enableQuietMode) { 543 checkManageUsersPermission("silence profile"); 544 boolean changed = false; 545 UserInfo profile, parent; 546 synchronized (mPackagesLock) { 547 synchronized (mUsersLock) { 548 profile = getUserInfoLU(userHandle); 549 parent = getProfileParentLU(userHandle); 550 551 } 552 if (profile == null || !profile.isManagedProfile()) { 553 throw new IllegalArgumentException("User " + userHandle + " is not a profile"); 554 } 555 if (profile.isQuietModeEnabled() != enableQuietMode) { 556 profile.flags ^= UserInfo.FLAG_QUIET_MODE; 557 writeUserLP(profile); 558 changed = true; 559 } 560 } 561 if (changed) { 562 Bundle extras = new Bundle(); 563 extras.putBoolean(Intent.EXTRA_QUIET_MODE, enableQuietMode); 564 broadcastProfileAvailabilityChanges(profile.getUserHandle(), 565 parent != null ? parent.getUserHandle() : null, extras); 566 } 567 } 568 569 @Override 570 public boolean isQuietModeEnabled(int userHandle) { 571 synchronized (mPackagesLock) { 572 UserInfo info; 573 synchronized (mUsersLock) { 574 info = getUserInfoLU(userHandle); 575 } 576 if (info == null || !info.isManagedProfile()) { 577 throw new IllegalArgumentException("User " + userHandle + " is not a profile"); 578 } 579 return info.isQuietModeEnabled(); 580 } 581 } 582 583 @Override 584 public void setUserEnabled(int userId) { 585 checkManageUsersPermission("enable user"); 586 synchronized (mPackagesLock) { 587 UserInfo info; 588 synchronized (mUsersLock) { 589 info = getUserInfoLU(userId); 590 } 591 if (info != null && !info.isEnabled()) { 592 info.flags ^= UserInfo.FLAG_DISABLED; 593 writeUserLP(info); 594 } 595 } 596 } 597 598 @Override 599 public UserInfo getUserInfo(int userId) { 600 checkManageUsersPermission("query user"); 601 synchronized (mUsersLock) { 602 return getUserInfoLU(userId); 603 } 604 } 605 606 @Override 607 public boolean isRestricted() { 608 synchronized (mUsersLock) { 609 return getUserInfoLU(UserHandle.getCallingUserId()).isRestricted(); 610 } 611 } 612 613 @Override 614 public boolean canHaveRestrictedProfile(int userId) { 615 checkManageUsersPermission("canHaveRestrictedProfile"); 616 synchronized (mUsersLock) { 617 final UserInfo userInfo = getUserInfoLU(userId); 618 if (userInfo == null || !userInfo.canHaveProfile()) { 619 return false; 620 } 621 if (!userInfo.isAdmin()) { 622 return false; 623 } 624 // restricted profile can be created if there is no DO set and the admin user has no PO; 625 return !mIsDeviceManaged && !mIsUserManaged.get(userId); 626 } 627 } 628 629 /* 630 * Should be locked on mUsers before calling this. 631 */ 632 private UserInfo getUserInfoLU(int userId) { 633 UserInfo ui = mUsers.get(userId); 634 // If it is partial and not in the process of being removed, return as unknown user. 635 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 636 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 637 return null; 638 } 639 return ui; 640 } 641 642 /** 643 * Obtains {@link #mUsersLock} and return UserInfo from mUsers. 644 * <p>No permissions checking or any addition checks are made</p> 645 */ 646 private UserInfo getUserInfoNoChecks(int userId) { 647 synchronized (mUsersLock) { 648 return mUsers.get(userId); 649 } 650 } 651 652 /** Called by PackageManagerService */ 653 public boolean exists(int userId) { 654 return getUserInfoNoChecks(userId) != null; 655 } 656 657 @Override 658 public void setUserName(int userId, String name) { 659 checkManageUsersPermission("rename users"); 660 boolean changed = false; 661 synchronized (mPackagesLock) { 662 UserInfo info = getUserInfoNoChecks(userId); 663 if (info == null || info.partial) { 664 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 665 return; 666 } 667 if (name != null && !name.equals(info.name)) { 668 info.name = name; 669 writeUserLP(info); 670 changed = true; 671 } 672 } 673 if (changed) { 674 sendUserInfoChangedBroadcast(userId); 675 } 676 } 677 678 @Override 679 public void setUserIcon(int userId, Bitmap bitmap) { 680 checkManageUsersPermission("update users"); 681 long ident = Binder.clearCallingIdentity(); 682 try { 683 synchronized (mPackagesLock) { 684 UserInfo info = getUserInfoNoChecks(userId); 685 if (info == null || info.partial) { 686 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 687 return; 688 } 689 writeBitmapLP(info, bitmap); 690 writeUserLP(info); 691 } 692 sendUserInfoChangedBroadcast(userId); 693 } finally { 694 Binder.restoreCallingIdentity(ident); 695 } 696 } 697 698 private void sendUserInfoChangedBroadcast(int userId) { 699 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 700 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 701 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 702 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 703 } 704 705 @Override 706 public ParcelFileDescriptor getUserIcon(int userId) { 707 String iconPath; 708 synchronized (mPackagesLock) { 709 UserInfo info = getUserInfoNoChecks(userId); 710 if (info == null || info.partial) { 711 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 712 return null; 713 } 714 int callingGroupId = getUserInfoNoChecks(UserHandle.getCallingUserId()).profileGroupId; 715 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 716 || callingGroupId != info.profileGroupId) { 717 checkManageUsersPermission("get the icon of a user who is not related"); 718 } 719 if (info.iconPath == null) { 720 return null; 721 } 722 iconPath = info.iconPath; 723 } 724 725 try { 726 return ParcelFileDescriptor.open( 727 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 728 } catch (FileNotFoundException e) { 729 Log.e(LOG_TAG, "Couldn't find icon file", e); 730 } 731 return null; 732 } 733 734 public void makeInitialized(int userId) { 735 checkManageUsersPermission("makeInitialized"); 736 boolean scheduleWriteUser = false; 737 UserInfo info; 738 synchronized (mUsersLock) { 739 info = mUsers.get(userId); 740 if (info == null || info.partial) { 741 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 742 return; 743 } 744 if ((info.flags & UserInfo.FLAG_INITIALIZED) == 0) { 745 info.flags |= UserInfo.FLAG_INITIALIZED; 746 scheduleWriteUser = true; 747 } 748 } 749 if (scheduleWriteUser) { 750 scheduleWriteUser(info); 751 } 752 } 753 754 /** 755 * If default guest restrictions haven't been initialized yet, add the basic 756 * restrictions. 757 */ 758 private void initDefaultGuestRestrictions() { 759 synchronized (mGuestRestrictions) { 760 if (mGuestRestrictions.isEmpty()) { 761 mGuestRestrictions.putBoolean(UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES, true); 762 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 763 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 764 } 765 } 766 } 767 768 @Override 769 public Bundle getDefaultGuestRestrictions() { 770 checkManageUsersPermission("getDefaultGuestRestrictions"); 771 synchronized (mGuestRestrictions) { 772 return new Bundle(mGuestRestrictions); 773 } 774 } 775 776 @Override 777 public void setDefaultGuestRestrictions(Bundle restrictions) { 778 checkManageUsersPermission("setDefaultGuestRestrictions"); 779 synchronized (mGuestRestrictions) { 780 mGuestRestrictions.clear(); 781 mGuestRestrictions.putAll(restrictions); 782 } 783 synchronized (mPackagesLock) { 784 writeUserListLP(); 785 } 786 } 787 788 /** 789 * See {@link UserManagerInternal#setDevicePolicyUserRestrictions(int, Bundle, Bundle)} 790 */ 791 void setDevicePolicyUserRestrictions(int userId, @NonNull Bundle local, 792 @Nullable Bundle global) { 793 Preconditions.checkNotNull(local); 794 boolean globalChanged = false; 795 boolean localChanged; 796 synchronized (mRestrictionsLock) { 797 if (global != null) { 798 // Update global. 799 globalChanged = !UserRestrictionsUtils.areEqual( 800 mDevicePolicyGlobalUserRestrictions, global); 801 if (globalChanged) { 802 mDevicePolicyGlobalUserRestrictions = global; 803 } 804 } 805 { 806 // Update local. 807 final Bundle prev = mDevicePolicyLocalUserRestrictions.get(userId); 808 localChanged = !UserRestrictionsUtils.areEqual(prev, local); 809 if (localChanged) { 810 mDevicePolicyLocalUserRestrictions.put(userId, local); 811 } 812 } 813 } 814 if (DBG) { 815 Log.d(LOG_TAG, "setDevicePolicyUserRestrictions: userId=" + userId 816 + " global=" + global + (globalChanged ? " (changed)" : "") 817 + " local=" + local + (localChanged ? " (changed)" : "") 818 ); 819 } 820 // Don't call them within the mRestrictionsLock. 821 synchronized (mPackagesLock) { 822 if (globalChanged) { 823 writeUserListLP(); 824 } 825 if (localChanged) { 826 writeUserLP(getUserInfoNoChecks(userId)); 827 } 828 } 829 830 synchronized (mRestrictionsLock) { 831 if (globalChanged) { 832 applyUserRestrictionsForAllUsersLR(); 833 } else if (localChanged) { 834 applyUserRestrictionsLR(userId); 835 } 836 } 837 } 838 839 @GuardedBy("mRestrictionsLock") 840 private Bundle computeEffectiveUserRestrictionsLR(int userId) { 841 final Bundle baseRestrictions = 842 UserRestrictionsUtils.nonNull(mBaseUserRestrictions.get(userId)); 843 final Bundle global = mDevicePolicyGlobalUserRestrictions; 844 final Bundle local = mDevicePolicyLocalUserRestrictions.get(userId); 845 846 if (UserRestrictionsUtils.isEmpty(global) && UserRestrictionsUtils.isEmpty(local)) { 847 // Common case first. 848 return baseRestrictions; 849 } 850 final Bundle effective = UserRestrictionsUtils.clone(baseRestrictions); 851 UserRestrictionsUtils.merge(effective, global); 852 UserRestrictionsUtils.merge(effective, local); 853 854 return effective; 855 } 856 857 @GuardedBy("mRestrictionsLock") 858 private void invalidateEffectiveUserRestrictionsLR(int userId) { 859 if (DBG) { 860 Log.d(LOG_TAG, "invalidateEffectiveUserRestrictions userId=" + userId); 861 } 862 mCachedEffectiveUserRestrictions.remove(userId); 863 } 864 865 private Bundle getEffectiveUserRestrictions(int userId) { 866 synchronized (mRestrictionsLock) { 867 Bundle restrictions = mCachedEffectiveUserRestrictions.get(userId); 868 if (restrictions == null) { 869 restrictions = computeEffectiveUserRestrictionsLR(userId); 870 mCachedEffectiveUserRestrictions.put(userId, restrictions); 871 } 872 return restrictions; 873 } 874 } 875 876 /** @return a specific user restriction that's in effect currently. */ 877 @Override 878 public boolean hasUserRestriction(String restrictionKey, int userId) { 879 Bundle restrictions = getEffectiveUserRestrictions(userId); 880 return restrictions != null && restrictions.getBoolean(restrictionKey); 881 } 882 883 /** 884 * @return UserRestrictions that are in effect currently. This always returns a new 885 * {@link Bundle}. 886 */ 887 @Override 888 public Bundle getUserRestrictions(int userId) { 889 return UserRestrictionsUtils.clone(getEffectiveUserRestrictions(userId)); 890 } 891 892 @Override 893 public boolean hasBaseUserRestriction(String restrictionKey, int userId) { 894 checkManageUsersPermission("hasBaseUserRestriction"); 895 synchronized (mRestrictionsLock) { 896 Bundle bundle = mBaseUserRestrictions.get(userId); 897 return (bundle != null && bundle.getBoolean(restrictionKey, false)); 898 } 899 } 900 901 @Override 902 public void setUserRestriction(String key, boolean value, int userId) { 903 checkManageUsersPermission("setUserRestriction"); 904 synchronized (mRestrictionsLock) { 905 // Note we can't modify Bundles stored in mBaseUserRestrictions directly, so create 906 // a copy. 907 final Bundle newRestrictions = UserRestrictionsUtils.clone( 908 mBaseUserRestrictions.get(userId)); 909 newRestrictions.putBoolean(key, value); 910 911 updateUserRestrictionsInternalLR(newRestrictions, userId); 912 } 913 } 914 915 /** 916 * Optionally updating user restrictions, calculate the effective user restrictions and also 917 * propagate to other services and system settings. 918 * 919 * @param newRestrictions User restrictions to set. 920 * If null, will not update user restrictions and only does the propagation. 921 * @param userId target user ID. 922 */ 923 @GuardedBy("mRestrictionsLock") 924 private void updateUserRestrictionsInternalLR( 925 @Nullable Bundle newRestrictions, int userId) { 926 927 final Bundle prevAppliedRestrictions = UserRestrictionsUtils.nonNull( 928 mAppliedUserRestrictions.get(userId)); 929 930 // Update base restrictions. 931 if (newRestrictions != null) { 932 // If newRestrictions == the current one, it's probably a bug. 933 final Bundle prevBaseRestrictions = mBaseUserRestrictions.get(userId); 934 935 Preconditions.checkState(prevBaseRestrictions != newRestrictions); 936 Preconditions.checkState(mCachedEffectiveUserRestrictions.get(userId) 937 != newRestrictions); 938 939 if (!UserRestrictionsUtils.areEqual(prevBaseRestrictions, newRestrictions)) { 940 mBaseUserRestrictions.put(userId, newRestrictions); 941 scheduleWriteUser(getUserInfoNoChecks(userId)); 942 } 943 } 944 945 final Bundle effective = computeEffectiveUserRestrictionsLR(userId); 946 947 mCachedEffectiveUserRestrictions.put(userId, effective); 948 949 // Apply the new restrictions. 950 if (DBG) { 951 debug("Applying user restrictions: userId=" + userId 952 + " new=" + effective + " prev=" + prevAppliedRestrictions); 953 } 954 955 if (mAppOpsService != null) { // We skip it until system-ready. 956 final long token = Binder.clearCallingIdentity(); 957 try { 958 mAppOpsService.setUserRestrictions(effective, userId); 959 } catch (RemoteException e) { 960 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 961 } finally { 962 Binder.restoreCallingIdentity(token); 963 } 964 } 965 966 propagateUserRestrictionsLR(userId, effective, prevAppliedRestrictions); 967 968 mAppliedUserRestrictions.put(userId, new Bundle(effective)); 969 } 970 971 private void propagateUserRestrictionsLR(final int userId, 972 Bundle newRestrictions, Bundle prevRestrictions) { 973 // Note this method doesn't touch any state, meaning it doesn't require mRestrictionsLock 974 // actually, but we still need some kind of synchronization otherwise we might end up 975 // calling listeners out-of-order, thus "LR". 976 977 if (UserRestrictionsUtils.areEqual(newRestrictions, prevRestrictions)) { 978 return; 979 } 980 981 final Bundle newRestrictionsFinal = new Bundle(newRestrictions); 982 final Bundle prevRestrictionsFinal = new Bundle(prevRestrictions); 983 984 mHandler.post(new Runnable() { 985 @Override 986 public void run() { 987 UserRestrictionsUtils.applyUserRestrictions( 988 mContext, userId, newRestrictionsFinal, prevRestrictionsFinal); 989 990 final UserRestrictionsListener[] listeners; 991 synchronized (mUserRestrictionsListeners) { 992 listeners = new UserRestrictionsListener[mUserRestrictionsListeners.size()]; 993 mUserRestrictionsListeners.toArray(listeners); 994 } 995 for (int i = 0; i < listeners.length; i++) { 996 listeners[i].onUserRestrictionsChanged(userId, 997 newRestrictionsFinal, prevRestrictionsFinal); 998 } 999 } 1000 }); 1001 } 1002 1003 // Package private for the inner class. 1004 void applyUserRestrictionsLR(int userId) { 1005 updateUserRestrictionsInternalLR(null, userId); 1006 } 1007 1008 @GuardedBy("mRestrictionsLock") 1009 // Package private for the inner class. 1010 void applyUserRestrictionsForAllUsersLR() { 1011 if (DBG) { 1012 debug("applyUserRestrictionsForAllUsersLR"); 1013 } 1014 // First, invalidate all cached values. 1015 mCachedEffectiveUserRestrictions.clear(); 1016 1017 // We don't want to call into ActivityManagerNative while taking a lock, so we'll call 1018 // it on a handler. 1019 final Runnable r = new Runnable() { 1020 @Override 1021 public void run() { 1022 // Then get the list of running users. 1023 final int[] runningUsers; 1024 try { 1025 runningUsers = ActivityManagerNative.getDefault().getRunningUserIds(); 1026 } catch (RemoteException e) { 1027 Log.w(LOG_TAG, "Unable to access ActivityManagerNative"); 1028 return; 1029 } 1030 // Then re-calculate the effective restrictions and apply, only for running users. 1031 // It's okay if a new user has started after the getRunningUserIds() call, 1032 // because we'll do the same thing (re-calculate the restrictions and apply) 1033 // when we start a user. 1034 synchronized (mRestrictionsLock) { 1035 for (int i = 0; i < runningUsers.length; i++) { 1036 applyUserRestrictionsLR(runningUsers[i]); 1037 } 1038 } 1039 } 1040 }; 1041 mHandler.post(r); 1042 } 1043 1044 /** 1045 * Check if we've hit the limit of how many users can be created. 1046 */ 1047 private boolean isUserLimitReached() { 1048 int count; 1049 synchronized (mUsersLock) { 1050 count = getAliveUsersExcludingGuestsCountLU(); 1051 } 1052 return count >= UserManager.getMaxSupportedUsers(); 1053 } 1054 1055 @Override 1056 public boolean canAddMoreManagedProfiles(int userId, boolean allowedToRemoveOne) { 1057 checkManageUsersPermission("check if more managed profiles can be added."); 1058 if (ActivityManager.isLowRamDeviceStatic()) { 1059 return false; 1060 } 1061 if (!mContext.getPackageManager().hasSystemFeature( 1062 PackageManager.FEATURE_MANAGED_USERS)) { 1063 return false; 1064 } 1065 // Limit number of managed profiles that can be created 1066 final int managedProfilesCount = getProfiles(userId, true).size() - 1; 1067 final int profilesRemovedCount = managedProfilesCount > 0 && allowedToRemoveOne ? 1 : 0; 1068 if (managedProfilesCount - profilesRemovedCount >= MAX_MANAGED_PROFILES) { 1069 return false; 1070 } 1071 synchronized(mUsersLock) { 1072 UserInfo userInfo = getUserInfoLU(userId); 1073 if (!userInfo.canHaveProfile()) { 1074 return false; 1075 } 1076 int usersCountAfterRemoving = getAliveUsersExcludingGuestsCountLU() 1077 - profilesRemovedCount; 1078 // We allow creating a managed profile in the special case where there is only one user. 1079 return usersCountAfterRemoving == 1 1080 || usersCountAfterRemoving < UserManager.getMaxSupportedUsers(); 1081 } 1082 } 1083 1084 private int getAliveUsersExcludingGuestsCountLU() { 1085 int aliveUserCount = 0; 1086 final int totalUserCount = mUsers.size(); 1087 // Skip over users being removed 1088 for (int i = 0; i < totalUserCount; i++) { 1089 UserInfo user = mUsers.valueAt(i); 1090 if (!mRemovingUserIds.get(user.id) 1091 && !user.isGuest() && !user.partial) { 1092 aliveUserCount++; 1093 } 1094 } 1095 return aliveUserCount; 1096 } 1097 1098 /** 1099 * Enforces that only the system UID or root's UID or apps that have the 1100 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} and 1101 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL INTERACT_ACROSS_USERS_FULL} 1102 * permissions can make certain calls to the UserManager. 1103 * 1104 * @param message used as message if SecurityException is thrown 1105 * @throws SecurityException if the caller does not have enough privilege. 1106 */ 1107 private static final void checkManageUserAndAcrossUsersFullPermission(String message) { 1108 final int uid = Binder.getCallingUid(); 1109 if (uid != Process.SYSTEM_UID && uid != 0 1110 && ActivityManager.checkComponentPermission( 1111 Manifest.permission.MANAGE_USERS, 1112 uid, -1, true) != PackageManager.PERMISSION_GRANTED 1113 && ActivityManager.checkComponentPermission( 1114 Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1115 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 1116 throw new SecurityException( 1117 "You need MANAGE_USERS and INTERACT_ACROSS_USERS_FULL permission to: " 1118 + message); 1119 } 1120 } 1121 1122 /** 1123 * Enforces that only the system UID or root's UID or apps that have the 1124 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 1125 * permission can make certain calls to the UserManager. 1126 * 1127 * @param message used as message if SecurityException is thrown 1128 * @throws SecurityException if the caller is not system or root 1129 */ 1130 private static final void checkManageUsersPermission(String message) { 1131 final int uid = Binder.getCallingUid(); 1132 if (!UserHandle.isSameApp(uid, Process.SYSTEM_UID) && uid != Process.ROOT_UID 1133 && ActivityManager.checkComponentPermission( 1134 android.Manifest.permission.MANAGE_USERS, 1135 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 1136 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 1137 } 1138 } 1139 1140 /** 1141 * Enforces that only the system UID or root's UID (on any user) can make certain calls to the 1142 * UserManager. 1143 * 1144 * @param message used as message if SecurityException is thrown 1145 * @throws SecurityException if the caller is not system or root 1146 */ 1147 private static void checkSystemOrRoot(String message) { 1148 final int uid = Binder.getCallingUid(); 1149 if (!UserHandle.isSameApp(uid, Process.SYSTEM_UID) && uid != Process.ROOT_UID) { 1150 throw new SecurityException("Only system may: " + message); 1151 } 1152 } 1153 1154 private void writeBitmapLP(UserInfo info, Bitmap bitmap) { 1155 try { 1156 File dir = new File(mUsersDir, Integer.toString(info.id)); 1157 File file = new File(dir, USER_PHOTO_FILENAME); 1158 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 1159 if (!dir.exists()) { 1160 dir.mkdir(); 1161 FileUtils.setPermissions( 1162 dir.getPath(), 1163 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 1164 -1, -1); 1165 } 1166 FileOutputStream os; 1167 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 1168 && tmp.renameTo(file)) { 1169 info.iconPath = file.getAbsolutePath(); 1170 } 1171 try { 1172 os.close(); 1173 } catch (IOException ioe) { 1174 // What the ... ! 1175 } 1176 tmp.delete(); 1177 } catch (FileNotFoundException e) { 1178 Slog.w(LOG_TAG, "Error setting photo for user ", e); 1179 } 1180 } 1181 1182 /** 1183 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 1184 * cache it elsewhere. 1185 * @return the array of user ids. 1186 */ 1187 public int[] getUserIds() { 1188 synchronized (mUsersLock) { 1189 return mUserIds; 1190 } 1191 } 1192 1193 private void readUserListLP() { 1194 if (!mUserListFile.exists()) { 1195 fallbackToSingleUserLP(); 1196 return; 1197 } 1198 FileInputStream fis = null; 1199 AtomicFile userListFile = new AtomicFile(mUserListFile); 1200 try { 1201 fis = userListFile.openRead(); 1202 XmlPullParser parser = Xml.newPullParser(); 1203 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1204 int type; 1205 while ((type = parser.next()) != XmlPullParser.START_TAG 1206 && type != XmlPullParser.END_DOCUMENT) { 1207 ; 1208 } 1209 1210 if (type != XmlPullParser.START_TAG) { 1211 Slog.e(LOG_TAG, "Unable to read user list"); 1212 fallbackToSingleUserLP(); 1213 return; 1214 } 1215 1216 mNextSerialNumber = -1; 1217 if (parser.getName().equals(TAG_USERS)) { 1218 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 1219 if (lastSerialNumber != null) { 1220 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 1221 } 1222 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 1223 if (versionNumber != null) { 1224 mUserVersion = Integer.parseInt(versionNumber); 1225 } 1226 } 1227 1228 final Bundle newDevicePolicyGlobalUserRestrictions = new Bundle(); 1229 1230 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1231 if (type == XmlPullParser.START_TAG) { 1232 final String name = parser.getName(); 1233 if (name.equals(TAG_USER)) { 1234 String id = parser.getAttributeValue(null, ATTR_ID); 1235 Pair<UserInfo, String> userPair = readUserLP(Integer.parseInt(id)); 1236 1237 if (userPair != null) { 1238 UserInfo user = userPair.first; 1239 String account = userPair.second; 1240 synchronized (mUsersLock) { 1241 mUsers.put(user.id, user); 1242 mUserAccounts.put(user.id, account); 1243 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 1244 mNextSerialNumber = user.id + 1; 1245 } 1246 } 1247 } 1248 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 1249 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1250 && type != XmlPullParser.END_TAG) { 1251 if (type == XmlPullParser.START_TAG) { 1252 if (parser.getName().equals(TAG_RESTRICTIONS)) { 1253 synchronized (mGuestRestrictions) { 1254 UserRestrictionsUtils 1255 .readRestrictions(parser, mGuestRestrictions); 1256 } 1257 } else if (parser.getName().equals(TAG_DEVICE_POLICY_RESTRICTIONS) 1258 ) { 1259 UserRestrictionsUtils.readRestrictions(parser, 1260 newDevicePolicyGlobalUserRestrictions); 1261 } 1262 break; 1263 } 1264 } 1265 } 1266 } 1267 } 1268 synchronized (mRestrictionsLock) { 1269 mDevicePolicyGlobalUserRestrictions = newDevicePolicyGlobalUserRestrictions; 1270 } 1271 updateUserIds(); 1272 upgradeIfNecessaryLP(); 1273 } catch (IOException | XmlPullParserException e) { 1274 fallbackToSingleUserLP(); 1275 } finally { 1276 IoUtils.closeQuietly(fis); 1277 } 1278 } 1279 1280 /** 1281 * Upgrade steps between versions, either for fixing bugs or changing the data format. 1282 */ 1283 private void upgradeIfNecessaryLP() { 1284 final int originalVersion = mUserVersion; 1285 int userVersion = mUserVersion; 1286 if (userVersion < 1) { 1287 // Assign a proper name for the owner, if not initialized correctly before 1288 UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM); 1289 if ("Primary".equals(user.name)) { 1290 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 1291 scheduleWriteUser(user); 1292 } 1293 userVersion = 1; 1294 } 1295 1296 if (userVersion < 2) { 1297 // Owner should be marked as initialized 1298 UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM); 1299 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 1300 user.flags |= UserInfo.FLAG_INITIALIZED; 1301 scheduleWriteUser(user); 1302 } 1303 userVersion = 2; 1304 } 1305 1306 1307 if (userVersion < 4) { 1308 userVersion = 4; 1309 } 1310 1311 if (userVersion < 5) { 1312 initDefaultGuestRestrictions(); 1313 userVersion = 5; 1314 } 1315 1316 if (userVersion < 6) { 1317 final boolean splitSystemUser = UserManager.isSplitSystemUser(); 1318 synchronized (mUsersLock) { 1319 for (int i = 0; i < mUsers.size(); i++) { 1320 UserInfo user = mUsers.valueAt(i); 1321 // In non-split mode, only user 0 can have restricted profiles 1322 if (!splitSystemUser && user.isRestricted() 1323 && (user.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID)) { 1324 user.restrictedProfileParentId = UserHandle.USER_SYSTEM; 1325 scheduleWriteUser(user); 1326 } 1327 } 1328 } 1329 userVersion = 6; 1330 } 1331 1332 if (userVersion < USER_VERSION) { 1333 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 1334 + USER_VERSION); 1335 } else { 1336 mUserVersion = userVersion; 1337 1338 if (originalVersion < mUserVersion) { 1339 writeUserListLP(); 1340 } 1341 } 1342 } 1343 1344 private void fallbackToSingleUserLP() { 1345 int flags = UserInfo.FLAG_INITIALIZED; 1346 // In split system user mode, the admin and primary flags are assigned to the first human 1347 // user. 1348 if (!UserManager.isSplitSystemUser()) { 1349 flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY; 1350 } 1351 // Create the system user 1352 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 1353 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 1354 flags); 1355 synchronized (mUsersLock) { 1356 mUsers.put(system.id, system); 1357 } 1358 mNextSerialNumber = MIN_USER_ID; 1359 mUserVersion = USER_VERSION; 1360 1361 Bundle restrictions = new Bundle(); 1362 synchronized (mRestrictionsLock) { 1363 mBaseUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 1364 } 1365 1366 updateUserIds(); 1367 initDefaultGuestRestrictions(); 1368 1369 writeUserListLP(); 1370 writeUserLP(system); 1371 } 1372 1373 private void scheduleWriteUser(UserInfo userInfo) { 1374 if (DBG) { 1375 debug("scheduleWriteUser"); 1376 } 1377 // No need to wrap it within a lock -- worst case, we'll just post the same message 1378 // twice. 1379 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 1380 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 1381 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 1382 } 1383 } 1384 1385 /* 1386 * Writes the user file in this format: 1387 * 1388 * <user flags="20039023" id="0"> 1389 * <name>Primary</name> 1390 * </user> 1391 */ 1392 private void writeUserLP(UserInfo userInfo) { 1393 if (DBG) { 1394 debug("writeUserLP " + userInfo); 1395 } 1396 FileOutputStream fos = null; 1397 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 1398 try { 1399 fos = userFile.startWrite(); 1400 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1401 1402 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1403 final XmlSerializer serializer = new FastXmlSerializer(); 1404 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1405 serializer.startDocument(null, true); 1406 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1407 1408 serializer.startTag(null, TAG_USER); 1409 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 1410 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 1411 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 1412 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 1413 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 1414 Long.toString(userInfo.lastLoggedInTime)); 1415 if (userInfo.iconPath != null) { 1416 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 1417 } 1418 if (userInfo.partial) { 1419 serializer.attribute(null, ATTR_PARTIAL, "true"); 1420 } 1421 if (userInfo.guestToRemove) { 1422 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 1423 } 1424 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 1425 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 1426 Integer.toString(userInfo.profileGroupId)); 1427 } 1428 if (userInfo.restrictedProfileParentId != UserInfo.NO_PROFILE_GROUP_ID) { 1429 serializer.attribute(null, ATTR_RESTRICTED_PROFILE_PARENT_ID, 1430 Integer.toString(userInfo.restrictedProfileParentId)); 1431 } 1432 serializer.startTag(null, TAG_NAME); 1433 serializer.text(userInfo.name); 1434 serializer.endTag(null, TAG_NAME); 1435 synchronized (mRestrictionsLock) { 1436 UserRestrictionsUtils.writeRestrictions(serializer, 1437 mBaseUserRestrictions.get(userInfo.id), TAG_RESTRICTIONS); 1438 UserRestrictionsUtils.writeRestrictions(serializer, 1439 mDevicePolicyLocalUserRestrictions.get(userInfo.id), 1440 TAG_DEVICE_POLICY_RESTRICTIONS); 1441 } 1442 // Update the account field if it is set. 1443 String account; 1444 synchronized (mUsersLock) { 1445 account = mUserAccounts.get(userInfo.id); 1446 } 1447 if (account != null) { 1448 serializer.startTag(null, TAG_ACCOUNT); 1449 serializer.text(account); 1450 serializer.endTag(null, TAG_ACCOUNT); 1451 } 1452 1453 serializer.endTag(null, TAG_USER); 1454 1455 serializer.endDocument(); 1456 userFile.finishWrite(fos); 1457 } catch (Exception ioe) { 1458 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 1459 userFile.failWrite(fos); 1460 } 1461 } 1462 1463 /* 1464 * Writes the user list file in this format: 1465 * 1466 * <users nextSerialNumber="3"> 1467 * <user id="0"></user> 1468 * <user id="2"></user> 1469 * </users> 1470 */ 1471 private void writeUserListLP() { 1472 if (DBG) { 1473 debug("writeUserList"); 1474 } 1475 FileOutputStream fos = null; 1476 AtomicFile userListFile = new AtomicFile(mUserListFile); 1477 try { 1478 fos = userListFile.startWrite(); 1479 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1480 1481 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1482 final XmlSerializer serializer = new FastXmlSerializer(); 1483 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1484 serializer.startDocument(null, true); 1485 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1486 1487 serializer.startTag(null, TAG_USERS); 1488 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 1489 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 1490 1491 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 1492 synchronized (mGuestRestrictions) { 1493 UserRestrictionsUtils 1494 .writeRestrictions(serializer, mGuestRestrictions, TAG_RESTRICTIONS); 1495 } 1496 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 1497 synchronized (mRestrictionsLock) { 1498 UserRestrictionsUtils.writeRestrictions(serializer, 1499 mDevicePolicyGlobalUserRestrictions, TAG_DEVICE_POLICY_RESTRICTIONS); 1500 } 1501 int[] userIdsToWrite; 1502 synchronized (mUsersLock) { 1503 userIdsToWrite = new int[mUsers.size()]; 1504 for (int i = 0; i < userIdsToWrite.length; i++) { 1505 UserInfo user = mUsers.valueAt(i); 1506 userIdsToWrite[i] = user.id; 1507 } 1508 } 1509 for (int id : userIdsToWrite) { 1510 serializer.startTag(null, TAG_USER); 1511 serializer.attribute(null, ATTR_ID, Integer.toString(id)); 1512 serializer.endTag(null, TAG_USER); 1513 } 1514 1515 serializer.endTag(null, TAG_USERS); 1516 1517 serializer.endDocument(); 1518 userListFile.finishWrite(fos); 1519 } catch (Exception e) { 1520 userListFile.failWrite(fos); 1521 Slog.e(LOG_TAG, "Error writing user list"); 1522 } 1523 } 1524 1525 private Pair<UserInfo, String> readUserLP(int id) { 1526 int flags = 0; 1527 int serialNumber = id; 1528 String name = null; 1529 String account = null; 1530 String iconPath = null; 1531 long creationTime = 0L; 1532 long lastLoggedInTime = 0L; 1533 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1534 int restrictedProfileParentId = UserInfo.NO_PROFILE_GROUP_ID; 1535 boolean partial = false; 1536 boolean guestToRemove = false; 1537 Bundle baseRestrictions = new Bundle(); 1538 Bundle localRestrictions = new Bundle(); 1539 1540 FileInputStream fis = null; 1541 try { 1542 AtomicFile userFile = 1543 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1544 fis = userFile.openRead(); 1545 XmlPullParser parser = Xml.newPullParser(); 1546 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1547 int type; 1548 while ((type = parser.next()) != XmlPullParser.START_TAG 1549 && type != XmlPullParser.END_DOCUMENT) { 1550 ; 1551 } 1552 1553 if (type != XmlPullParser.START_TAG) { 1554 Slog.e(LOG_TAG, "Unable to read user " + id); 1555 return null; 1556 } 1557 1558 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1559 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1560 if (storedId != id) { 1561 Slog.e(LOG_TAG, "User id does not match the file name"); 1562 return null; 1563 } 1564 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1565 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1566 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1567 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1568 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1569 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1570 UserInfo.NO_PROFILE_GROUP_ID); 1571 restrictedProfileParentId = readIntAttribute(parser, 1572 ATTR_RESTRICTED_PROFILE_PARENT_ID, UserInfo.NO_PROFILE_GROUP_ID); 1573 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1574 if ("true".equals(valueString)) { 1575 partial = true; 1576 } 1577 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1578 if ("true".equals(valueString)) { 1579 guestToRemove = true; 1580 } 1581 1582 int outerDepth = parser.getDepth(); 1583 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1584 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1585 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1586 continue; 1587 } 1588 String tag = parser.getName(); 1589 if (TAG_NAME.equals(tag)) { 1590 type = parser.next(); 1591 if (type == XmlPullParser.TEXT) { 1592 name = parser.getText(); 1593 } 1594 } else if (TAG_RESTRICTIONS.equals(tag)) { 1595 UserRestrictionsUtils.readRestrictions(parser, baseRestrictions); 1596 } else if (TAG_DEVICE_POLICY_RESTRICTIONS.equals(tag)) { 1597 UserRestrictionsUtils.readRestrictions(parser, localRestrictions); 1598 } else if (TAG_ACCOUNT.equals(tag)) { 1599 type = parser.next(); 1600 if (type == XmlPullParser.TEXT) { 1601 account = parser.getText(); 1602 } 1603 } 1604 } 1605 } 1606 1607 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1608 userInfo.serialNumber = serialNumber; 1609 userInfo.creationTime = creationTime; 1610 userInfo.lastLoggedInTime = lastLoggedInTime; 1611 userInfo.partial = partial; 1612 userInfo.guestToRemove = guestToRemove; 1613 userInfo.profileGroupId = profileGroupId; 1614 userInfo.restrictedProfileParentId = restrictedProfileParentId; 1615 synchronized (mRestrictionsLock) { 1616 mBaseUserRestrictions.put(id, baseRestrictions); 1617 mDevicePolicyLocalUserRestrictions.put(id, localRestrictions); 1618 } 1619 return new Pair<>(userInfo, account); 1620 1621 } catch (IOException ioe) { 1622 } catch (XmlPullParserException pe) { 1623 } finally { 1624 if (fis != null) { 1625 try { 1626 fis.close(); 1627 } catch (IOException e) { 1628 } 1629 } 1630 } 1631 return null; 1632 } 1633 1634 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1635 String valueString = parser.getAttributeValue(null, attr); 1636 if (valueString == null) return defaultValue; 1637 try { 1638 return Integer.parseInt(valueString); 1639 } catch (NumberFormatException nfe) { 1640 return defaultValue; 1641 } 1642 } 1643 1644 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1645 String valueString = parser.getAttributeValue(null, attr); 1646 if (valueString == null) return defaultValue; 1647 try { 1648 return Long.parseLong(valueString); 1649 } catch (NumberFormatException nfe) { 1650 return defaultValue; 1651 } 1652 } 1653 1654 private boolean isPackageInstalled(String pkg, int userId) { 1655 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1656 PackageManager.GET_UNINSTALLED_PACKAGES, 1657 userId); 1658 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1659 return false; 1660 } 1661 return true; 1662 } 1663 1664 /** 1665 * Removes all the restrictions files (res_<packagename>) for a given user. 1666 * Does not do any permissions checking. 1667 */ 1668 private void cleanAppRestrictions(int userId) { 1669 synchronized (mPackagesLock) { 1670 File dir = Environment.getUserSystemDirectory(userId); 1671 String[] files = dir.list(); 1672 if (files == null) return; 1673 for (String fileName : files) { 1674 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1675 File resFile = new File(dir, fileName); 1676 if (resFile.exists()) { 1677 resFile.delete(); 1678 } 1679 } 1680 } 1681 } 1682 } 1683 1684 /** 1685 * Removes the app restrictions file for a specific package and user id, if it exists. 1686 */ 1687 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1688 synchronized (mPackagesLock) { 1689 File dir = Environment.getUserSystemDirectory(userId); 1690 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1691 if (resFile.exists()) { 1692 resFile.delete(); 1693 } 1694 } 1695 } 1696 1697 @Override 1698 public UserInfo createProfileForUser(String name, int flags, int userId) { 1699 checkManageUsersPermission("Only the system can create users"); 1700 return createUserInternal(name, flags, userId); 1701 } 1702 1703 @Override 1704 public UserInfo createUser(String name, int flags) { 1705 checkManageUsersPermission("Only the system can create users"); 1706 return createUserInternal(name, flags, UserHandle.USER_NULL); 1707 } 1708 1709 private UserInfo createUserInternal(String name, int flags, int parentId) { 1710 if (hasUserRestriction(UserManager.DISALLOW_ADD_USER, UserHandle.getCallingUserId())) { 1711 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1712 return null; 1713 } 1714 if (ActivityManager.isLowRamDeviceStatic()) { 1715 return null; 1716 } 1717 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1718 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1719 final boolean isRestricted = (flags & UserInfo.FLAG_RESTRICTED) != 0; 1720 final long ident = Binder.clearCallingIdentity(); 1721 UserInfo userInfo; 1722 final int userId; 1723 try { 1724 synchronized (mPackagesLock) { 1725 UserInfo parent = null; 1726 if (parentId != UserHandle.USER_NULL) { 1727 synchronized (mUsersLock) { 1728 parent = getUserInfoLU(parentId); 1729 } 1730 if (parent == null) return null; 1731 } 1732 if (isManagedProfile && !canAddMoreManagedProfiles(parentId, false)) { 1733 Log.e(LOG_TAG, "Cannot add more managed profiles for user " + parentId); 1734 return null; 1735 } 1736 if (!isGuest && !isManagedProfile && isUserLimitReached()) { 1737 // If we're not adding a guest user or a managed profile and the limit has 1738 // been reached, cannot add a user. 1739 return null; 1740 } 1741 // If we're adding a guest and there already exists one, bail. 1742 if (isGuest && findCurrentGuestUser() != null) { 1743 return null; 1744 } 1745 // In legacy mode, restricted profile's parent can only be the owner user 1746 if (isRestricted && !UserManager.isSplitSystemUser() 1747 && (parentId != UserHandle.USER_SYSTEM)) { 1748 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1749 return null; 1750 } 1751 if (isRestricted && UserManager.isSplitSystemUser()) { 1752 if (parent == null) { 1753 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be " 1754 + "specified"); 1755 return null; 1756 } 1757 if (!parent.canHaveProfile()) { 1758 Log.w(LOG_TAG, "Cannot add restricted profile - profiles cannot be " 1759 + "created for the specified parent user id " + parentId); 1760 return null; 1761 } 1762 } 1763 // In split system user mode, we assign the first human user the primary flag. 1764 // And if there is no device owner, we also assign the admin flag to primary user. 1765 if (UserManager.isSplitSystemUser() 1766 && !isGuest && !isManagedProfile && getPrimaryUser() == null) { 1767 flags |= UserInfo.FLAG_PRIMARY; 1768 synchronized (mUsersLock) { 1769 if (!mIsDeviceManaged) { 1770 flags |= UserInfo.FLAG_ADMIN; 1771 } 1772 } 1773 } 1774 1775 if (parent != null && parent.isEphemeral()) { 1776 flags |= UserInfo.FLAG_EPHEMERAL; 1777 } 1778 userId = getNextAvailableId(); 1779 userInfo = new UserInfo(userId, name, null, flags); 1780 userInfo.serialNumber = mNextSerialNumber++; 1781 long now = System.currentTimeMillis(); 1782 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1783 userInfo.partial = true; 1784 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1785 synchronized (mUsersLock) { 1786 mUsers.put(userId, userInfo); 1787 } 1788 writeUserListLP(); 1789 if (parent != null) { 1790 if (isManagedProfile) { 1791 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1792 parent.profileGroupId = parent.id; 1793 writeUserLP(parent); 1794 } 1795 userInfo.profileGroupId = parent.profileGroupId; 1796 } else if (isRestricted) { 1797 if (parent.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID) { 1798 parent.restrictedProfileParentId = parent.id; 1799 writeUserLP(parent); 1800 } 1801 userInfo.restrictedProfileParentId = parent.restrictedProfileParentId; 1802 } 1803 } 1804 } 1805 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1806 storage.createUserKey(userId, userInfo.serialNumber, userInfo.isEphemeral()); 1807 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1808 final String volumeUuid = vol.getFsUuid(); 1809 try { 1810 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 1811 storage.prepareUserStorage( 1812 volumeUuid, userId, userInfo.serialNumber, userInfo.isEphemeral()); 1813 enforceSerialNumber(userDir, userInfo.serialNumber); 1814 } catch (IOException e) { 1815 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1816 } 1817 } 1818 mPm.createNewUser(userId); 1819 userInfo.partial = false; 1820 synchronized (mPackagesLock) { 1821 writeUserLP(userInfo); 1822 } 1823 updateUserIds(); 1824 Bundle restrictions = new Bundle(); 1825 if (isGuest) { 1826 synchronized (mGuestRestrictions) { 1827 restrictions.putAll(mGuestRestrictions); 1828 } 1829 } 1830 synchronized (mRestrictionsLock) { 1831 mBaseUserRestrictions.append(userId, restrictions); 1832 } 1833 mPm.newUserCreated(userId); 1834 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1835 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 1836 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1837 android.Manifest.permission.MANAGE_USERS); 1838 MetricsLogger.count(mContext, isGuest ? TRON_GUEST_CREATED : TRON_USER_CREATED, 1); 1839 } finally { 1840 Binder.restoreCallingIdentity(ident); 1841 } 1842 return userInfo; 1843 } 1844 1845 /** 1846 * @hide 1847 */ 1848 public UserInfo createRestrictedProfile(String name, int parentUserId) { 1849 checkManageUsersPermission("setupRestrictedProfile"); 1850 final UserInfo user = createProfileForUser(name, UserInfo.FLAG_RESTRICTED, parentUserId); 1851 if (user == null) { 1852 return null; 1853 } 1854 setUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS, true, user.id); 1855 // Change the setting before applying the DISALLOW_SHARE_LOCATION restriction, otherwise 1856 // the putIntForUser() will fail. 1857 android.provider.Settings.Secure.putIntForUser(mContext.getContentResolver(), 1858 android.provider.Settings.Secure.LOCATION_MODE, 1859 android.provider.Settings.Secure.LOCATION_MODE_OFF, user.id); 1860 setUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, true, user.id); 1861 return user; 1862 } 1863 1864 /** 1865 * Find the current guest user. If the Guest user is partial, 1866 * then do not include it in the results as it is about to die. 1867 */ 1868 private UserInfo findCurrentGuestUser() { 1869 synchronized (mUsersLock) { 1870 final int size = mUsers.size(); 1871 for (int i = 0; i < size; i++) { 1872 final UserInfo user = mUsers.valueAt(i); 1873 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1874 return user; 1875 } 1876 } 1877 } 1878 return null; 1879 } 1880 1881 /** 1882 * Mark this guest user for deletion to allow us to create another guest 1883 * and switch to that user before actually removing this guest. 1884 * @param userHandle the userid of the current guest 1885 * @return whether the user could be marked for deletion 1886 */ 1887 public boolean markGuestForDeletion(int userHandle) { 1888 checkManageUsersPermission("Only the system can remove users"); 1889 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1890 UserManager.DISALLOW_REMOVE_USER, false)) { 1891 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1892 return false; 1893 } 1894 1895 long ident = Binder.clearCallingIdentity(); 1896 try { 1897 final UserInfo user; 1898 synchronized (mPackagesLock) { 1899 synchronized (mUsersLock) { 1900 user = mUsers.get(userHandle); 1901 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1902 return false; 1903 } 1904 } 1905 if (!user.isGuest()) { 1906 return false; 1907 } 1908 // We set this to a guest user that is to be removed. This is a temporary state 1909 // where we are allowed to add new Guest users, even if this one is still not 1910 // removed. This user will still show up in getUserInfo() calls. 1911 // If we don't get around to removing this Guest user, it will be purged on next 1912 // startup. 1913 user.guestToRemove = true; 1914 // Mark it as disabled, so that it isn't returned any more when 1915 // profiles are queried. 1916 user.flags |= UserInfo.FLAG_DISABLED; 1917 writeUserLP(user); 1918 } 1919 } finally { 1920 Binder.restoreCallingIdentity(ident); 1921 } 1922 return true; 1923 } 1924 1925 /** 1926 * Removes a user and all data directories created for that user. This method should be called 1927 * after the user's processes have been terminated. 1928 * @param userHandle the user's id 1929 */ 1930 public boolean removeUser(int userHandle) { 1931 checkManageUsersPermission("Only the system can remove users"); 1932 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1933 UserManager.DISALLOW_REMOVE_USER, false)) { 1934 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1935 return false; 1936 } 1937 1938 long ident = Binder.clearCallingIdentity(); 1939 try { 1940 final UserInfo user; 1941 int currentUser = ActivityManager.getCurrentUser(); 1942 if (currentUser == userHandle) { 1943 Log.w(LOG_TAG, "Current user cannot be removed"); 1944 return false; 1945 } 1946 synchronized (mPackagesLock) { 1947 synchronized (mUsersLock) { 1948 user = mUsers.get(userHandle); 1949 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1950 return false; 1951 } 1952 1953 // We remember deleted user IDs to prevent them from being 1954 // reused during the current boot; they can still be reused 1955 // after a reboot. 1956 mRemovingUserIds.put(userHandle, true); 1957 } 1958 1959 try { 1960 mAppOpsService.removeUser(userHandle); 1961 } catch (RemoteException e) { 1962 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1963 } 1964 // Set this to a partially created user, so that the user will be purged 1965 // on next startup, in case the runtime stops now before stopping and 1966 // removing the user completely. 1967 user.partial = true; 1968 // Mark it as disabled, so that it isn't returned any more when 1969 // profiles are queried. 1970 user.flags |= UserInfo.FLAG_DISABLED; 1971 writeUserLP(user); 1972 } 1973 1974 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1975 && user.isManagedProfile()) { 1976 // Send broadcast to notify system that the user removed was a 1977 // managed user. 1978 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1979 } 1980 1981 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1982 int res; 1983 try { 1984 res = ActivityManagerNative.getDefault().stopUser(userHandle, /* force= */ true, 1985 new IStopUserCallback.Stub() { 1986 @Override 1987 public void userStopped(int userId) { 1988 finishRemoveUser(userId); 1989 } 1990 @Override 1991 public void userStopAborted(int userId) { 1992 } 1993 }); 1994 } catch (RemoteException e) { 1995 return false; 1996 } 1997 return res == ActivityManager.USER_OP_SUCCESS; 1998 } finally { 1999 Binder.restoreCallingIdentity(ident); 2000 } 2001 } 2002 2003 void finishRemoveUser(final int userHandle) { 2004 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 2005 // Let other services shutdown any activity and clean up their state before completely 2006 // wiping the user's system directory and removing from the user list 2007 long ident = Binder.clearCallingIdentity(); 2008 try { 2009 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 2010 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 2011 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 2012 android.Manifest.permission.MANAGE_USERS, 2013 2014 new BroadcastReceiver() { 2015 @Override 2016 public void onReceive(Context context, Intent intent) { 2017 if (DBG) { 2018 Slog.i(LOG_TAG, 2019 "USER_REMOVED broadcast sent, cleaning up user data " 2020 + userHandle); 2021 } 2022 new Thread() { 2023 public void run() { 2024 // Clean up any ActivityManager state 2025 LocalServices.getService(ActivityManagerInternal.class) 2026 .onUserRemoved(userHandle); 2027 removeUserState(userHandle); 2028 } 2029 }.start(); 2030 } 2031 }, 2032 2033 null, Activity.RESULT_OK, null, null); 2034 } finally { 2035 Binder.restoreCallingIdentity(ident); 2036 } 2037 } 2038 2039 private void removeUserState(final int userHandle) { 2040 mContext.getSystemService(StorageManager.class).destroyUserKey(userHandle); 2041 // Cleanup package manager settings 2042 mPm.cleanUpUser(this, userHandle); 2043 2044 // Remove this user from the list 2045 synchronized (mUsersLock) { 2046 mUsers.remove(userHandle); 2047 mUserAccounts.delete(userHandle); 2048 mIsUserManaged.delete(userHandle); 2049 } 2050 synchronized (mRestrictionsLock) { 2051 mBaseUserRestrictions.remove(userHandle); 2052 mAppliedUserRestrictions.remove(userHandle); 2053 mCachedEffectiveUserRestrictions.remove(userHandle); 2054 mDevicePolicyLocalUserRestrictions.remove(userHandle); 2055 } 2056 // Remove user file 2057 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 2058 userFile.delete(); 2059 // Update the user list 2060 synchronized (mPackagesLock) { 2061 writeUserListLP(); 2062 } 2063 updateUserIds(); 2064 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 2065 } 2066 2067 private void removeDirectoryRecursive(File parent) { 2068 if (parent.isDirectory()) { 2069 String[] files = parent.list(); 2070 for (String filename : files) { 2071 File child = new File(parent, filename); 2072 removeDirectoryRecursive(child); 2073 } 2074 } 2075 parent.delete(); 2076 } 2077 2078 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 2079 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 2080 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 2081 Intent.FLAG_RECEIVER_FOREGROUND); 2082 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 2083 managedProfileIntent.putExtra(Intent.EXTRA_USER_HANDLE, removedUserId); 2084 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 2085 } 2086 2087 @Override 2088 public Bundle getApplicationRestrictions(String packageName) { 2089 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 2090 } 2091 2092 @Override 2093 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 2094 if (UserHandle.getCallingUserId() != userId 2095 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 2096 checkSystemOrRoot("get application restrictions for other users/apps"); 2097 } 2098 synchronized (mPackagesLock) { 2099 // Read the restrictions from XML 2100 return readApplicationRestrictionsLP(packageName, userId); 2101 } 2102 } 2103 2104 @Override 2105 public void setApplicationRestrictions(String packageName, Bundle restrictions, 2106 int userId) { 2107 checkSystemOrRoot("set application restrictions"); 2108 synchronized (mPackagesLock) { 2109 if (restrictions == null || restrictions.isEmpty()) { 2110 cleanAppRestrictionsForPackage(packageName, userId); 2111 } else { 2112 // Write the restrictions to XML 2113 writeApplicationRestrictionsLP(packageName, restrictions, userId); 2114 } 2115 } 2116 2117 if (isPackageInstalled(packageName, userId)) { 2118 // Notify package of changes via an intent - only sent to explicitly registered receivers. 2119 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 2120 changeIntent.setPackage(packageName); 2121 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 2122 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 2123 } 2124 } 2125 2126 private void unhideAllInstalledAppsForUser(final int userHandle) { 2127 mHandler.post(new Runnable() { 2128 @Override 2129 public void run() { 2130 List<ApplicationInfo> apps = 2131 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 2132 userHandle).getList(); 2133 final long ident = Binder.clearCallingIdentity(); 2134 try { 2135 for (ApplicationInfo appInfo : apps) { 2136 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 2137 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 2138 != 0) { 2139 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 2140 userHandle); 2141 } 2142 } 2143 } finally { 2144 Binder.restoreCallingIdentity(ident); 2145 } 2146 } 2147 }); 2148 } 2149 private int getUidForPackage(String packageName) { 2150 long ident = Binder.clearCallingIdentity(); 2151 try { 2152 return mContext.getPackageManager().getApplicationInfo(packageName, 2153 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 2154 } catch (NameNotFoundException nnfe) { 2155 return -1; 2156 } finally { 2157 Binder.restoreCallingIdentity(ident); 2158 } 2159 } 2160 2161 private Bundle readApplicationRestrictionsLP(String packageName, int userId) { 2162 AtomicFile restrictionsFile = 2163 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 2164 packageToRestrictionsFileName(packageName))); 2165 return readApplicationRestrictionsLP(restrictionsFile); 2166 } 2167 2168 @VisibleForTesting 2169 static Bundle readApplicationRestrictionsLP(AtomicFile restrictionsFile) { 2170 final Bundle restrictions = new Bundle(); 2171 final ArrayList<String> values = new ArrayList<>(); 2172 if (!restrictionsFile.getBaseFile().exists()) { 2173 return restrictions; 2174 } 2175 2176 FileInputStream fis = null; 2177 try { 2178 fis = restrictionsFile.openRead(); 2179 XmlPullParser parser = Xml.newPullParser(); 2180 parser.setInput(fis, StandardCharsets.UTF_8.name()); 2181 XmlUtils.nextElement(parser); 2182 if (parser.getEventType() != XmlPullParser.START_TAG) { 2183 Slog.e(LOG_TAG, "Unable to read restrictions file " 2184 + restrictionsFile.getBaseFile()); 2185 return restrictions; 2186 } 2187 while (parser.next() != XmlPullParser.END_DOCUMENT) { 2188 readEntry(restrictions, values, parser); 2189 } 2190 } catch (IOException|XmlPullParserException e) { 2191 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 2192 } finally { 2193 IoUtils.closeQuietly(fis); 2194 } 2195 return restrictions; 2196 } 2197 2198 private static void readEntry(Bundle restrictions, ArrayList<String> values, 2199 XmlPullParser parser) throws XmlPullParserException, IOException { 2200 int type = parser.getEventType(); 2201 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 2202 String key = parser.getAttributeValue(null, ATTR_KEY); 2203 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 2204 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 2205 if (multiple != null) { 2206 values.clear(); 2207 int count = Integer.parseInt(multiple); 2208 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 2209 if (type == XmlPullParser.START_TAG 2210 && parser.getName().equals(TAG_VALUE)) { 2211 values.add(parser.nextText().trim()); 2212 count--; 2213 } 2214 } 2215 String [] valueStrings = new String[values.size()]; 2216 values.toArray(valueStrings); 2217 restrictions.putStringArray(key, valueStrings); 2218 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 2219 restrictions.putBundle(key, readBundleEntry(parser, values)); 2220 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 2221 final int outerDepth = parser.getDepth(); 2222 ArrayList<Bundle> bundleList = new ArrayList<>(); 2223 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 2224 Bundle childBundle = readBundleEntry(parser, values); 2225 bundleList.add(childBundle); 2226 } 2227 restrictions.putParcelableArray(key, 2228 bundleList.toArray(new Bundle[bundleList.size()])); 2229 } else { 2230 String value = parser.nextText().trim(); 2231 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 2232 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 2233 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 2234 restrictions.putInt(key, Integer.parseInt(value)); 2235 } else { 2236 restrictions.putString(key, value); 2237 } 2238 } 2239 } 2240 } 2241 2242 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 2243 throws IOException, XmlPullParserException { 2244 Bundle childBundle = new Bundle(); 2245 final int outerDepth = parser.getDepth(); 2246 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 2247 readEntry(childBundle, values, parser); 2248 } 2249 return childBundle; 2250 } 2251 2252 private void writeApplicationRestrictionsLP(String packageName, 2253 Bundle restrictions, int userId) { 2254 AtomicFile restrictionsFile = new AtomicFile( 2255 new File(Environment.getUserSystemDirectory(userId), 2256 packageToRestrictionsFileName(packageName))); 2257 writeApplicationRestrictionsLP(restrictions, restrictionsFile); 2258 } 2259 2260 @VisibleForTesting 2261 static void writeApplicationRestrictionsLP(Bundle restrictions, AtomicFile restrictionsFile) { 2262 FileOutputStream fos = null; 2263 try { 2264 fos = restrictionsFile.startWrite(); 2265 final BufferedOutputStream bos = new BufferedOutputStream(fos); 2266 2267 final XmlSerializer serializer = new FastXmlSerializer(); 2268 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 2269 serializer.startDocument(null, true); 2270 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 2271 2272 serializer.startTag(null, TAG_RESTRICTIONS); 2273 writeBundle(restrictions, serializer); 2274 serializer.endTag(null, TAG_RESTRICTIONS); 2275 2276 serializer.endDocument(); 2277 restrictionsFile.finishWrite(fos); 2278 } catch (Exception e) { 2279 restrictionsFile.failWrite(fos); 2280 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 2281 } 2282 } 2283 2284 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 2285 throws IOException { 2286 for (String key : restrictions.keySet()) { 2287 Object value = restrictions.get(key); 2288 serializer.startTag(null, TAG_ENTRY); 2289 serializer.attribute(null, ATTR_KEY, key); 2290 2291 if (value instanceof Boolean) { 2292 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 2293 serializer.text(value.toString()); 2294 } else if (value instanceof Integer) { 2295 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 2296 serializer.text(value.toString()); 2297 } else if (value == null || value instanceof String) { 2298 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 2299 serializer.text(value != null ? (String) value : ""); 2300 } else if (value instanceof Bundle) { 2301 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 2302 writeBundle((Bundle) value, serializer); 2303 } else if (value instanceof Parcelable[]) { 2304 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 2305 Parcelable[] array = (Parcelable[]) value; 2306 for (Parcelable parcelable : array) { 2307 if (!(parcelable instanceof Bundle)) { 2308 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 2309 } 2310 serializer.startTag(null, TAG_ENTRY); 2311 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 2312 writeBundle((Bundle) parcelable, serializer); 2313 serializer.endTag(null, TAG_ENTRY); 2314 } 2315 } else { 2316 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 2317 String[] values = (String[]) value; 2318 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 2319 for (String choice : values) { 2320 serializer.startTag(null, TAG_VALUE); 2321 serializer.text(choice != null ? choice : ""); 2322 serializer.endTag(null, TAG_VALUE); 2323 } 2324 } 2325 serializer.endTag(null, TAG_ENTRY); 2326 } 2327 } 2328 2329 @Override 2330 public int getUserSerialNumber(int userHandle) { 2331 synchronized (mUsersLock) { 2332 if (!exists(userHandle)) return -1; 2333 return getUserInfoLU(userHandle).serialNumber; 2334 } 2335 } 2336 2337 @Override 2338 public int getUserHandle(int userSerialNumber) { 2339 synchronized (mUsersLock) { 2340 for (int userId : mUserIds) { 2341 UserInfo info = getUserInfoLU(userId); 2342 if (info != null && info.serialNumber == userSerialNumber) return userId; 2343 } 2344 // Not found 2345 return -1; 2346 } 2347 } 2348 2349 @Override 2350 public long getUserCreationTime(int userHandle) { 2351 int callingUserId = UserHandle.getCallingUserId(); 2352 UserInfo userInfo = null; 2353 synchronized (mUsersLock) { 2354 if (callingUserId == userHandle) { 2355 userInfo = getUserInfoLU(userHandle); 2356 } else { 2357 UserInfo parent = getProfileParentLU(userHandle); 2358 if (parent != null && parent.id == callingUserId) { 2359 userInfo = getUserInfoLU(userHandle); 2360 } 2361 } 2362 } 2363 if (userInfo == null) { 2364 throw new SecurityException("userHandle can only be the calling user or a managed " 2365 + "profile associated with this user"); 2366 } 2367 return userInfo.creationTime; 2368 } 2369 2370 /** 2371 * Caches the list of user ids in an array, adjusting the array size when necessary. 2372 */ 2373 private void updateUserIds() { 2374 int num = 0; 2375 synchronized (mUsersLock) { 2376 final int userSize = mUsers.size(); 2377 for (int i = 0; i < userSize; i++) { 2378 if (!mUsers.valueAt(i).partial) { 2379 num++; 2380 } 2381 } 2382 final int[] newUsers = new int[num]; 2383 int n = 0; 2384 for (int i = 0; i < userSize; i++) { 2385 if (!mUsers.valueAt(i).partial) { 2386 newUsers[n++] = mUsers.keyAt(i); 2387 } 2388 } 2389 mUserIds = newUsers; 2390 } 2391 } 2392 2393 /** 2394 * Called right before a user starts. This will not be called for the system user. 2395 */ 2396 public void onBeforeStartUser(int userId) { 2397 synchronized (mRestrictionsLock) { 2398 applyUserRestrictionsLR(userId); 2399 } 2400 } 2401 2402 /** 2403 * Make a note of the last started time of a user and do some cleanup. 2404 * @param userId the user that was just foregrounded 2405 */ 2406 public void onUserForeground(int userId) { 2407 UserInfo user = getUserInfoNoChecks(userId); 2408 if (user == null || user.partial) { 2409 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 2410 return; 2411 } 2412 long now = System.currentTimeMillis(); 2413 if (now > EPOCH_PLUS_30_YEARS) { 2414 user.lastLoggedInTime = now; 2415 scheduleWriteUser(user); 2416 } 2417 } 2418 2419 /** 2420 * Returns the next available user id, filling in any holes in the ids. 2421 * TODO: May not be a good idea to recycle ids, in case it results in confusion 2422 * for data and battery stats collection, or unexpected cross-talk. 2423 */ 2424 private int getNextAvailableId() { 2425 synchronized (mUsersLock) { 2426 int i = MIN_USER_ID; 2427 while (i < MAX_USER_ID) { 2428 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 2429 return i; 2430 } 2431 i++; 2432 } 2433 } 2434 throw new IllegalStateException("No user id available!"); 2435 } 2436 2437 private String packageToRestrictionsFileName(String packageName) { 2438 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 2439 } 2440 2441 /** 2442 * Enforce that serial number stored in user directory inode matches the 2443 * given expected value. Gracefully sets the serial number if currently 2444 * undefined. 2445 * 2446 * @throws IOException when problem extracting serial number, or serial 2447 * number is mismatched. 2448 */ 2449 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 2450 final int foundSerial = getSerialNumber(file); 2451 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 2452 2453 if (foundSerial == -1) { 2454 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 2455 try { 2456 setSerialNumber(file, serialNumber); 2457 } catch (IOException e) { 2458 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 2459 } 2460 2461 } else if (foundSerial != serialNumber) { 2462 throw new IOException("Found serial number " + foundSerial 2463 + " doesn't match expected " + serialNumber); 2464 } 2465 } 2466 2467 /** 2468 * Set serial number stored in user directory inode. 2469 * 2470 * @throws IOException if serial number was already set 2471 */ 2472 private static void setSerialNumber(File file, int serialNumber) 2473 throws IOException { 2474 try { 2475 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 2476 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 2477 } catch (ErrnoException e) { 2478 throw e.rethrowAsIOException(); 2479 } 2480 } 2481 2482 /** 2483 * Return serial number stored in user directory inode. 2484 * 2485 * @return parsed serial number, or -1 if not set 2486 */ 2487 private static int getSerialNumber(File file) throws IOException { 2488 try { 2489 final byte[] buf = new byte[256]; 2490 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 2491 final String serial = new String(buf, 0, len); 2492 try { 2493 return Integer.parseInt(serial); 2494 } catch (NumberFormatException e) { 2495 throw new IOException("Bad serial number: " + serial); 2496 } 2497 } catch (ErrnoException e) { 2498 if (e.errno == OsConstants.ENODATA) { 2499 return -1; 2500 } else { 2501 throw e.rethrowAsIOException(); 2502 } 2503 } 2504 } 2505 2506 @Override 2507 public void onShellCommand(FileDescriptor in, FileDescriptor out, 2508 FileDescriptor err, String[] args, ResultReceiver resultReceiver) { 2509 (new Shell()).exec(this, in, out, err, args, resultReceiver); 2510 } 2511 2512 int onShellCommand(Shell shell, String cmd) { 2513 if (cmd == null) { 2514 return shell.handleDefaultCommands(cmd); 2515 } 2516 2517 final PrintWriter pw = shell.getOutPrintWriter(); 2518 try { 2519 switch(cmd) { 2520 case "list": 2521 return runList(pw); 2522 } 2523 } catch (RemoteException e) { 2524 pw.println("Remote exception: " + e); 2525 } 2526 return -1; 2527 } 2528 2529 private int runList(PrintWriter pw) throws RemoteException { 2530 final IActivityManager am = ActivityManagerNative.getDefault(); 2531 final List<UserInfo> users = getUsers(false); 2532 if (users == null) { 2533 pw.println("Error: couldn't get users"); 2534 return 1; 2535 } else { 2536 pw.println("Users:"); 2537 for (int i = 0; i < users.size(); i++) { 2538 String running = am.isUserRunning(users.get(i).id, 0) ? " running" : ""; 2539 pw.println("\t" + users.get(i).toString() + running); 2540 } 2541 return 0; 2542 } 2543 } 2544 2545 @Override 2546 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2547 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 2548 != PackageManager.PERMISSION_GRANTED) { 2549 pw.println("Permission Denial: can't dump UserManager from from pid=" 2550 + Binder.getCallingPid() 2551 + ", uid=" + Binder.getCallingUid() 2552 + " without permission " 2553 + android.Manifest.permission.DUMP); 2554 return; 2555 } 2556 2557 long now = System.currentTimeMillis(); 2558 StringBuilder sb = new StringBuilder(); 2559 synchronized (mPackagesLock) { 2560 synchronized (mUsersLock) { 2561 pw.println("Users:"); 2562 for (int i = 0; i < mUsers.size(); i++) { 2563 UserInfo user = mUsers.valueAt(i); 2564 if (user == null) { 2565 continue; 2566 } 2567 final int userId = user.id; 2568 pw.print(" "); pw.print(user); 2569 pw.print(" serialNo="); pw.print(user.serialNumber); 2570 if (mRemovingUserIds.get(userId)) { 2571 pw.print(" <removing> "); 2572 } 2573 if (user.partial) { 2574 pw.print(" <partial>"); 2575 } 2576 pw.println(); 2577 pw.print(" Created: "); 2578 if (user.creationTime == 0) { 2579 pw.println("<unknown>"); 2580 } else { 2581 sb.setLength(0); 2582 TimeUtils.formatDuration(now - user.creationTime, sb); 2583 sb.append(" ago"); 2584 pw.println(sb); 2585 } 2586 pw.print(" Last logged in: "); 2587 if (user.lastLoggedInTime == 0) { 2588 pw.println("<unknown>"); 2589 } else { 2590 sb.setLength(0); 2591 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2592 sb.append(" ago"); 2593 pw.println(sb); 2594 } 2595 pw.print(" Has profile owner: "); 2596 pw.println(mIsUserManaged.get(userId)); 2597 pw.println(" Restrictions:"); 2598 synchronized (mRestrictionsLock) { 2599 UserRestrictionsUtils.dumpRestrictions( 2600 pw, " ", mBaseUserRestrictions.get(user.id)); 2601 pw.println(" Device policy local restrictions:"); 2602 UserRestrictionsUtils.dumpRestrictions( 2603 pw, " ", mDevicePolicyLocalUserRestrictions.get(user.id)); 2604 pw.println(" Effective restrictions:"); 2605 UserRestrictionsUtils.dumpRestrictions( 2606 pw, " ", mCachedEffectiveUserRestrictions.get(user.id)); 2607 } 2608 pw.println(); 2609 String accountName = mUserAccounts.get(userId); 2610 if (accountName != null) { 2611 pw.print(" Account name: " + accountName); 2612 pw.println(); 2613 } 2614 } 2615 } 2616 pw.println(" Device policy global restrictions:"); 2617 synchronized (mRestrictionsLock) { 2618 UserRestrictionsUtils 2619 .dumpRestrictions(pw, " ", mDevicePolicyGlobalUserRestrictions); 2620 } 2621 pw.println(); 2622 pw.println(" Guest restrictions:"); 2623 synchronized (mGuestRestrictions) { 2624 UserRestrictionsUtils.dumpRestrictions(pw, " ", mGuestRestrictions); 2625 } 2626 synchronized (mUsersLock) { 2627 pw.println(); 2628 pw.println(" Device managed: " + mIsDeviceManaged); 2629 } 2630 } 2631 } 2632 2633 final class MainHandler extends Handler { 2634 2635 @Override 2636 public void handleMessage(Message msg) { 2637 switch (msg.what) { 2638 case WRITE_USER_MSG: 2639 removeMessages(WRITE_USER_MSG, msg.obj); 2640 synchronized (mPackagesLock) { 2641 int userId = ((UserInfo) msg.obj).id; 2642 UserInfo userInfo = getUserInfoNoChecks(userId); 2643 if (userInfo != null) { 2644 writeUserLP(userInfo); 2645 } 2646 } 2647 } 2648 } 2649 } 2650 2651 /** 2652 * @param userId 2653 * @return whether the user has been initialized yet 2654 */ 2655 boolean isInitialized(int userId) { 2656 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2657 } 2658 2659 private class LocalService extends UserManagerInternal { 2660 @Override 2661 public void setDevicePolicyUserRestrictions(int userId, @NonNull Bundle localRestrictions, 2662 @Nullable Bundle globalRestrictions) { 2663 UserManagerService.this.setDevicePolicyUserRestrictions(userId, localRestrictions, 2664 globalRestrictions); 2665 } 2666 2667 @Override 2668 public Bundle getBaseUserRestrictions(int userId) { 2669 synchronized (mRestrictionsLock) { 2670 return mBaseUserRestrictions.get(userId); 2671 } 2672 } 2673 2674 @Override 2675 public void setBaseUserRestrictionsByDpmsForMigration( 2676 int userId, Bundle baseRestrictions) { 2677 synchronized (mRestrictionsLock) { 2678 mBaseUserRestrictions.put(userId, new Bundle(baseRestrictions)); 2679 invalidateEffectiveUserRestrictionsLR(userId); 2680 } 2681 2682 final UserInfo userInfo = getUserInfoNoChecks(userId); 2683 synchronized (mPackagesLock) { 2684 if (userInfo != null) { 2685 writeUserLP(userInfo); 2686 } else { 2687 Slog.w(LOG_TAG, "UserInfo not found for " + userId); 2688 } 2689 } 2690 } 2691 2692 @Override 2693 public boolean getUserRestriction(int userId, String key) { 2694 return getUserRestrictions(userId).getBoolean(key); 2695 } 2696 2697 @Override 2698 public void addUserRestrictionsListener(UserRestrictionsListener listener) { 2699 synchronized (mUserRestrictionsListeners) { 2700 mUserRestrictionsListeners.add(listener); 2701 } 2702 } 2703 2704 @Override 2705 public void removeUserRestrictionsListener(UserRestrictionsListener listener) { 2706 synchronized (mUserRestrictionsListeners) { 2707 mUserRestrictionsListeners.remove(listener); 2708 } 2709 } 2710 2711 @Override 2712 public void setDeviceManaged(boolean isManaged) { 2713 synchronized (mUsersLock) { 2714 mIsDeviceManaged = isManaged; 2715 } 2716 } 2717 2718 @Override 2719 public void setUserManaged(int userId, boolean isManaged) { 2720 synchronized (mUsersLock) { 2721 mIsUserManaged.put(userId, isManaged); 2722 } 2723 } 2724 } 2725 2726 private class Shell extends ShellCommand { 2727 @Override 2728 public int onCommand(String cmd) { 2729 return onShellCommand(this, cmd); 2730 } 2731 2732 @Override 2733 public void onHelp() { 2734 final PrintWriter pw = getOutPrintWriter(); 2735 pw.println("User manager (user) commands:"); 2736 pw.println(" help"); 2737 pw.println(" Print this help text."); 2738 pw.println(""); 2739 pw.println(" list"); 2740 pw.println(" Prints all users on the system."); 2741 } 2742 } 2743 2744 private static void debug(String message) { 2745 Log.d(LOG_TAG, message + 2746 (DBG_WITH_STACKTRACE ? " called at\n" + Debug.getCallers(10, " ") : "")); 2747 } 2748} 2749