UserManagerService.java revision a4f119790e32fcce56586e7324d508e35cb30a2a
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.accounts.Account; 20import android.annotation.NonNull; 21import android.app.Activity; 22import android.app.ActivityManager; 23import android.app.ActivityManagerInternal; 24import android.app.ActivityManagerNative; 25import android.app.IStopUserCallback; 26import android.app.admin.DevicePolicyManager; 27import android.content.BroadcastReceiver; 28import android.content.Context; 29import android.content.Intent; 30import android.content.pm.ApplicationInfo; 31import android.content.pm.PackageManager; 32import android.content.pm.PackageManager.NameNotFoundException; 33import android.content.pm.UserInfo; 34import android.graphics.Bitmap; 35import android.os.Binder; 36import android.os.Bundle; 37import android.os.Environment; 38import android.os.FileUtils; 39import android.os.Handler; 40import android.os.IUserManager; 41import android.os.Message; 42import android.os.ParcelFileDescriptor; 43import android.os.Parcelable; 44import android.os.Process; 45import android.os.RemoteException; 46import android.os.ServiceManager; 47import android.os.UserHandle; 48import android.os.UserManager; 49import android.os.storage.StorageManager; 50import android.os.storage.VolumeInfo; 51import android.system.ErrnoException; 52import android.system.Os; 53import android.system.OsConstants; 54import android.util.AtomicFile; 55import android.util.Log; 56import android.util.Slog; 57import android.util.SparseArray; 58import android.util.SparseBooleanArray; 59import android.util.TimeUtils; 60import android.util.Xml; 61 62import com.android.internal.annotations.VisibleForTesting; 63import com.android.internal.app.IAppOpsService; 64import com.android.internal.util.FastXmlSerializer; 65import com.android.internal.util.XmlUtils; 66import com.android.server.LocalServices; 67 68import org.xmlpull.v1.XmlPullParser; 69import org.xmlpull.v1.XmlPullParserException; 70import org.xmlpull.v1.XmlSerializer; 71 72import java.io.BufferedOutputStream; 73import java.io.File; 74import java.io.FileDescriptor; 75import java.io.FileInputStream; 76import java.io.FileNotFoundException; 77import java.io.FileOutputStream; 78import java.io.IOException; 79import java.io.PrintWriter; 80import java.nio.charset.StandardCharsets; 81import java.util.ArrayList; 82import java.util.List; 83 84import libcore.io.IoUtils; 85 86public class UserManagerService extends IUserManager.Stub { 87 88 private static final String LOG_TAG = "UserManagerService"; 89 90 private static final boolean DBG = false; 91 92 private static final String TAG_NAME = "name"; 93 private static final String ATTR_FLAGS = "flags"; 94 private static final String ATTR_ICON_PATH = "icon"; 95 private static final String ATTR_ID = "id"; 96 private static final String ATTR_CREATION_TIME = "created"; 97 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 98 private static final String ATTR_SERIAL_NO = "serialNumber"; 99 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 100 private static final String ATTR_PARTIAL = "partial"; 101 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 102 private static final String ATTR_USER_VERSION = "version"; 103 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 104 private static final String ATTR_RESTRICTED_PROFILE_PARENT_ID = "restrictedProfileParentId"; 105 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 106 private static final String TAG_USERS = "users"; 107 private static final String TAG_USER = "user"; 108 private static final String TAG_RESTRICTIONS = "restrictions"; 109 private static final String TAG_ENTRY = "entry"; 110 private static final String TAG_VALUE = "value"; 111 private static final String ATTR_KEY = "key"; 112 private static final String ATTR_VALUE_TYPE = "type"; 113 private static final String ATTR_MULTIPLE = "m"; 114 115 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 116 private static final String ATTR_TYPE_STRING = "s"; 117 private static final String ATTR_TYPE_BOOLEAN = "b"; 118 private static final String ATTR_TYPE_INTEGER = "i"; 119 private static final String ATTR_TYPE_BUNDLE = "B"; 120 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 121 122 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 123 private static final String USER_LIST_FILENAME = "userlist.xml"; 124 private static final String USER_PHOTO_FILENAME = "photo.png"; 125 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 126 127 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 128 private static final String XML_SUFFIX = ".xml"; 129 130 private static final int MIN_USER_ID = 10; 131 // We need to keep process uid within Integer.MAX_VALUE. 132 private static final int MAX_USER_ID = Integer.MAX_VALUE / UserHandle.PER_USER_RANGE; 133 134 private static final int USER_VERSION = 6; 135 136 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 137 138 // Maximum number of managed profiles permitted per user is 1. This cannot be increased 139 // without first making sure that the rest of the framework is prepared for it. 140 private static final int MAX_MANAGED_PROFILES = 1; 141 142 /** 143 * Flag indicating whether device credentials are shared among same-user profiles. 144 */ 145 private static final boolean CONFIG_PROFILES_SHARE_CREDENTIAL = true; 146 147 static final int WRITE_USER_MSG = 1; 148 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 149 150 private static final String XATTR_SERIAL = "user.serial"; 151 152 private final Context mContext; 153 private final PackageManagerService mPm; 154 private final Object mInstallLock; 155 private final Object mPackagesLock; 156 157 private final Handler mHandler; 158 159 private final File mUsersDir; 160 private final File mUserListFile; 161 162 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 163 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 164 private final Bundle mGuestRestrictions = new Bundle(); 165 166 /** 167 * Set of user IDs being actively removed. Removed IDs linger in this set 168 * for several seconds to work around a VFS caching issue. 169 */ 170 // @GuardedBy("mPackagesLock") 171 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 172 173 private int[] mUserIds; 174 private int mNextSerialNumber; 175 private int mUserVersion = 0; 176 177 private IAppOpsService mAppOpsService; 178 179 private static UserManagerService sInstance; 180 181 public static UserManagerService getInstance() { 182 synchronized (UserManagerService.class) { 183 return sInstance; 184 } 185 } 186 187 /** 188 * Available for testing purposes. 189 */ 190 UserManagerService(File dataDir, File baseUserPath) { 191 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 192 } 193 194 /** 195 * Called by package manager to create the service. This is closely 196 * associated with the package manager, and the given lock is the 197 * package manager's own lock. 198 */ 199 UserManagerService(Context context, PackageManagerService pm, 200 Object installLock, Object packagesLock) { 201 this(context, pm, installLock, packagesLock, 202 Environment.getDataDirectory(), 203 new File(Environment.getDataDirectory(), "user")); 204 } 205 206 /** 207 * Available for testing purposes. 208 */ 209 private UserManagerService(Context context, PackageManagerService pm, 210 Object installLock, Object packagesLock, 211 File dataDir, File baseUserPath) { 212 mContext = context; 213 mPm = pm; 214 mInstallLock = installLock; 215 mPackagesLock = packagesLock; 216 mHandler = new MainHandler(); 217 synchronized (mInstallLock) { 218 synchronized (mPackagesLock) { 219 mUsersDir = new File(dataDir, USER_INFO_DIR); 220 mUsersDir.mkdirs(); 221 // Make zeroth user directory, for services to migrate their files to that location 222 File userZeroDir = new File(mUsersDir, String.valueOf(UserHandle.USER_SYSTEM)); 223 userZeroDir.mkdirs(); 224 FileUtils.setPermissions(mUsersDir.toString(), 225 FileUtils.S_IRWXU|FileUtils.S_IRWXG 226 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 227 -1, -1); 228 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 229 initDefaultGuestRestrictions(); 230 readUserListLocked(); 231 sInstance = this; 232 } 233 } 234 } 235 236 void systemReady() { 237 synchronized (mInstallLock) { 238 synchronized (mPackagesLock) { 239 // Prune out any partially created/partially removed users. 240 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 241 final int userSize = mUsers.size(); 242 for (int i = 0; i < userSize; i++) { 243 UserInfo ui = mUsers.valueAt(i); 244 if ((ui.partial || ui.guestToRemove) && i != 0) { 245 partials.add(ui); 246 } 247 } 248 final int partialsSize = partials.size(); 249 for (int i = 0; i < partialsSize; i++) { 250 UserInfo ui = partials.get(i); 251 Slog.w(LOG_TAG, "Removing partially created user " + ui.id 252 + " (name=" + ui.name + ")"); 253 removeUserStateLocked(ui.id); 254 } 255 } 256 } 257 onUserForeground(UserHandle.USER_SYSTEM); 258 mAppOpsService = IAppOpsService.Stub.asInterface( 259 ServiceManager.getService(Context.APP_OPS_SERVICE)); 260 for (int i = 0; i < mUserIds.length; ++i) { 261 try { 262 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 263 } catch (RemoteException e) { 264 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 265 } 266 } 267 } 268 269 @Override 270 public UserInfo getPrimaryUser() { 271 checkManageUsersPermission("query users"); 272 synchronized (mPackagesLock) { 273 final int userSize = mUsers.size(); 274 for (int i = 0; i < userSize; i++) { 275 UserInfo ui = mUsers.valueAt(i); 276 if (ui.isPrimary()) { 277 return ui; 278 } 279 } 280 } 281 return null; 282 } 283 284 @Override 285 public @NonNull List<UserInfo> getUsers(boolean excludeDying) { 286 checkManageUsersPermission("query users"); 287 synchronized (mPackagesLock) { 288 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 289 final int userSize = mUsers.size(); 290 for (int i = 0; i < userSize; i++) { 291 UserInfo ui = mUsers.valueAt(i); 292 if (ui.partial) { 293 continue; 294 } 295 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 296 users.add(ui); 297 } 298 } 299 return users; 300 } 301 } 302 303 @Override 304 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 305 if (userId != UserHandle.getCallingUserId()) { 306 checkManageUsersPermission("getting profiles related to user " + userId); 307 } 308 final long ident = Binder.clearCallingIdentity(); 309 try { 310 synchronized (mPackagesLock) { 311 return getProfilesLocked(userId, enabledOnly); 312 } 313 } finally { 314 Binder.restoreCallingIdentity(ident); 315 } 316 } 317 318 /** Assume permissions already checked and caller's identity cleared */ 319 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 320 UserInfo user = getUserInfoLocked(userId); 321 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 322 if (user == null) { 323 // Probably a dying user 324 return users; 325 } 326 final int userSize = mUsers.size(); 327 for (int i = 0; i < userSize; i++) { 328 UserInfo profile = mUsers.valueAt(i); 329 if (!isProfileOf(user, profile)) { 330 continue; 331 } 332 if (enabledOnly && !profile.isEnabled()) { 333 continue; 334 } 335 if (mRemovingUserIds.get(profile.id)) { 336 continue; 337 } 338 users.add(profile); 339 } 340 return users; 341 } 342 343 @Override 344 public int getCredentialOwnerProfile(int userHandle) { 345 checkManageUsersPermission("get the credential owner"); 346 if (CONFIG_PROFILES_SHARE_CREDENTIAL) { 347 synchronized (mPackagesLock) { 348 UserInfo profileParent = getProfileParentLocked(userHandle); 349 if (profileParent != null) { 350 return profileParent.id; 351 } 352 } 353 } 354 355 return userHandle; 356 } 357 358 @Override 359 public UserInfo getProfileParent(int userHandle) { 360 checkManageUsersPermission("get the profile parent"); 361 synchronized (mPackagesLock) { 362 return getProfileParentLocked(userHandle); 363 } 364 } 365 366 private UserInfo getProfileParentLocked(int userHandle) { 367 UserInfo profile = getUserInfoLocked(userHandle); 368 if (profile == null) { 369 return null; 370 } 371 int parentUserId = profile.profileGroupId; 372 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 373 return null; 374 } else { 375 return getUserInfoLocked(parentUserId); 376 } 377 } 378 379 private boolean isProfileOf(UserInfo user, UserInfo profile) { 380 return user.id == profile.id || 381 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 382 && user.profileGroupId == profile.profileGroupId); 383 } 384 385 @Override 386 public void setUserEnabled(int userId) { 387 checkManageUsersPermission("enable user"); 388 synchronized (mPackagesLock) { 389 UserInfo info = getUserInfoLocked(userId); 390 if (info != null && !info.isEnabled()) { 391 info.flags ^= UserInfo.FLAG_DISABLED; 392 writeUserLocked(info); 393 } 394 } 395 } 396 397 @Override 398 public UserInfo getUserInfo(int userId) { 399 checkManageUsersPermission("query user"); 400 synchronized (mPackagesLock) { 401 return getUserInfoLocked(userId); 402 } 403 } 404 405 @Override 406 public boolean isRestricted() { 407 synchronized (mPackagesLock) { 408 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 409 } 410 } 411 412 @Override 413 public boolean canHaveRestrictedProfile(int userId) { 414 checkManageUsersPermission("canHaveRestrictedProfile"); 415 synchronized (mPackagesLock) { 416 final UserInfo userInfo = getUserInfoLocked(userId); 417 if (userInfo == null || !userInfo.canHaveProfile()) { 418 return false; 419 } 420 if (!userInfo.isAdmin()) { 421 return false; 422 } 423 } 424 DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService( 425 Context.DEVICE_POLICY_SERVICE); 426 // restricted profile can be created if there is no DO set and the admin user has no PO 427 return dpm.getDeviceOwner() == null && dpm.getProfileOwnerAsUser(userId) == null; 428 } 429 430 /* 431 * Should be locked on mUsers before calling this. 432 */ 433 private UserInfo getUserInfoLocked(int userId) { 434 UserInfo ui = mUsers.get(userId); 435 // If it is partial and not in the process of being removed, return as unknown user. 436 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 437 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 438 return null; 439 } 440 return ui; 441 } 442 443 /** Called by PackageManagerService */ 444 public boolean exists(int userId) { 445 synchronized (mPackagesLock) { 446 return mUsers.get(userId) != null; 447 } 448 } 449 450 @Override 451 public void setUserName(int userId, String name) { 452 checkManageUsersPermission("rename users"); 453 boolean changed = false; 454 synchronized (mPackagesLock) { 455 UserInfo info = mUsers.get(userId); 456 if (info == null || info.partial) { 457 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 458 return; 459 } 460 if (name != null && !name.equals(info.name)) { 461 info.name = name; 462 writeUserLocked(info); 463 changed = true; 464 } 465 } 466 if (changed) { 467 sendUserInfoChangedBroadcast(userId); 468 } 469 } 470 471 @Override 472 public void setUserIcon(int userId, Bitmap bitmap) { 473 checkManageUsersPermission("update users"); 474 long ident = Binder.clearCallingIdentity(); 475 try { 476 synchronized (mPackagesLock) { 477 UserInfo info = mUsers.get(userId); 478 if (info == null || info.partial) { 479 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 480 return; 481 } 482 writeBitmapLocked(info, bitmap); 483 writeUserLocked(info); 484 } 485 sendUserInfoChangedBroadcast(userId); 486 } finally { 487 Binder.restoreCallingIdentity(ident); 488 } 489 } 490 491 private void sendUserInfoChangedBroadcast(int userId) { 492 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 493 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 494 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 495 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 496 } 497 498 @Override 499 public ParcelFileDescriptor getUserIcon(int userId) { 500 String iconPath; 501 synchronized (mPackagesLock) { 502 UserInfo info = mUsers.get(userId); 503 if (info == null || info.partial) { 504 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 505 return null; 506 } 507 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 508 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 509 || callingGroupId != info.profileGroupId) { 510 checkManageUsersPermission("get the icon of a user who is not related"); 511 } 512 if (info.iconPath == null) { 513 return null; 514 } 515 iconPath = info.iconPath; 516 } 517 518 try { 519 return ParcelFileDescriptor.open( 520 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 521 } catch (FileNotFoundException e) { 522 Log.e(LOG_TAG, "Couldn't find icon file", e); 523 } 524 return null; 525 } 526 527 public void makeInitialized(int userId) { 528 checkManageUsersPermission("makeInitialized"); 529 synchronized (mPackagesLock) { 530 UserInfo info = mUsers.get(userId); 531 if (info == null || info.partial) { 532 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 533 } 534 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 535 info.flags |= UserInfo.FLAG_INITIALIZED; 536 scheduleWriteUserLocked(info); 537 } 538 } 539 } 540 541 /** 542 * If default guest restrictions haven't been initialized yet, add the basic 543 * restrictions. 544 */ 545 private void initDefaultGuestRestrictions() { 546 if (mGuestRestrictions.isEmpty()) { 547 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 548 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 549 } 550 } 551 552 @Override 553 public Bundle getDefaultGuestRestrictions() { 554 checkManageUsersPermission("getDefaultGuestRestrictions"); 555 synchronized (mPackagesLock) { 556 return new Bundle(mGuestRestrictions); 557 } 558 } 559 560 @Override 561 public void setDefaultGuestRestrictions(Bundle restrictions) { 562 checkManageUsersPermission("setDefaultGuestRestrictions"); 563 synchronized (mPackagesLock) { 564 mGuestRestrictions.clear(); 565 mGuestRestrictions.putAll(restrictions); 566 writeUserListLocked(); 567 } 568 } 569 570 @Override 571 public boolean hasUserRestriction(String restrictionKey, int userId) { 572 synchronized (mPackagesLock) { 573 Bundle restrictions = mUserRestrictions.get(userId); 574 return restrictions != null && restrictions.getBoolean(restrictionKey); 575 } 576 } 577 578 @Override 579 public Bundle getUserRestrictions(int userId) { 580 // checkManageUsersPermission("getUserRestrictions"); 581 582 synchronized (mPackagesLock) { 583 Bundle restrictions = mUserRestrictions.get(userId); 584 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 585 } 586 } 587 588 @Override 589 public void setUserRestriction(String key, boolean value, int userId) { 590 checkManageUsersPermission("setUserRestriction"); 591 synchronized (mPackagesLock) { 592 if (!UserRestrictionsUtils.SYSTEM_CONTROLLED_USER_RESTRICTIONS.contains(key)) { 593 Bundle restrictions = getUserRestrictions(userId); 594 restrictions.putBoolean(key, value); 595 setUserRestrictionsInternalLocked(restrictions, userId); 596 } 597 } 598 } 599 600 @Override 601 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 602 checkSystemOrRoot("setSystemControlledUserRestriction"); 603 synchronized (mPackagesLock) { 604 Bundle restrictions = getUserRestrictions(userId); 605 restrictions.putBoolean(key, value); 606 setUserRestrictionsInternalLocked(restrictions, userId); 607 } 608 } 609 610 @Override 611 public void setUserRestrictions(Bundle restrictions, int userId) { 612 checkManageUsersPermission("setUserRestrictions"); 613 if (restrictions == null) return; 614 615 synchronized (mPackagesLock) { 616 final Bundle oldUserRestrictions = mUserRestrictions.get(userId); 617 // Restore the original state of system controlled restrictions from oldUserRestrictions 618 for (String key : UserRestrictionsUtils.SYSTEM_CONTROLLED_USER_RESTRICTIONS) { 619 restrictions.remove(key); 620 if (oldUserRestrictions.containsKey(key)) { 621 restrictions.putBoolean(key, oldUserRestrictions.getBoolean(key)); 622 } 623 } 624 setUserRestrictionsInternalLocked(restrictions, userId); 625 } 626 } 627 628 private void setUserRestrictionsInternalLocked(Bundle restrictions, int userId) { 629 final Bundle userRestrictions = mUserRestrictions.get(userId); 630 userRestrictions.clear(); 631 userRestrictions.putAll(restrictions); 632 long token = Binder.clearCallingIdentity(); 633 try { 634 mAppOpsService.setUserRestrictions(userRestrictions, userId); 635 } catch (RemoteException e) { 636 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 637 } finally { 638 Binder.restoreCallingIdentity(token); 639 } 640 scheduleWriteUserLocked(mUsers.get(userId)); 641 } 642 643 /** 644 * Check if we've hit the limit of how many users can be created. 645 */ 646 private boolean isUserLimitReachedLocked() { 647 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 648 } 649 650 @Override 651 public boolean canAddMoreManagedProfiles(int userId) { 652 checkManageUsersPermission("check if more managed profiles can be added."); 653 if (ActivityManager.isLowRamDeviceStatic()) { 654 return false; 655 } 656 if (!mContext.getPackageManager().hasSystemFeature( 657 PackageManager.FEATURE_MANAGED_USERS)) { 658 return false; 659 } 660 // Limit number of managed profiles that can be created 661 int managedProfilesCount = getProfiles(userId, true).size() - 1; 662 if (managedProfilesCount >= MAX_MANAGED_PROFILES) { 663 return false; 664 } 665 synchronized(mPackagesLock) { 666 UserInfo userInfo = getUserInfoLocked(userId); 667 if (!userInfo.canHaveProfile()) { 668 return false; 669 } 670 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 671 // We allow creating a managed profile in the special case where there is only one user. 672 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 673 } 674 } 675 676 private int getAliveUsersExcludingGuestsCountLocked() { 677 int aliveUserCount = 0; 678 final int totalUserCount = mUsers.size(); 679 // Skip over users being removed 680 for (int i = 0; i < totalUserCount; i++) { 681 UserInfo user = mUsers.valueAt(i); 682 if (!mRemovingUserIds.get(user.id) 683 && !user.isGuest() && !user.partial) { 684 aliveUserCount++; 685 } 686 } 687 return aliveUserCount; 688 } 689 690 /** 691 * Enforces that only the system UID or root's UID or apps that have the 692 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 693 * permission can make certain calls to the UserManager. 694 * 695 * @param message used as message if SecurityException is thrown 696 * @throws SecurityException if the caller is not system or root 697 */ 698 private static final void checkManageUsersPermission(String message) { 699 final int uid = Binder.getCallingUid(); 700 if (uid != Process.SYSTEM_UID && uid != 0 701 && ActivityManager.checkComponentPermission( 702 android.Manifest.permission.MANAGE_USERS, 703 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 704 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 705 } 706 } 707 708 private static void checkSystemOrRoot(String message) { 709 final int uid = Binder.getCallingUid(); 710 if (uid != Process.SYSTEM_UID && uid != 0) { 711 throw new SecurityException("Only system may call: " + message); 712 } 713 } 714 715 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 716 try { 717 File dir = new File(mUsersDir, Integer.toString(info.id)); 718 File file = new File(dir, USER_PHOTO_FILENAME); 719 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 720 if (!dir.exists()) { 721 dir.mkdir(); 722 FileUtils.setPermissions( 723 dir.getPath(), 724 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 725 -1, -1); 726 } 727 FileOutputStream os; 728 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 729 && tmp.renameTo(file)) { 730 info.iconPath = file.getAbsolutePath(); 731 } 732 try { 733 os.close(); 734 } catch (IOException ioe) { 735 // What the ... ! 736 } 737 tmp.delete(); 738 } catch (FileNotFoundException e) { 739 Slog.w(LOG_TAG, "Error setting photo for user ", e); 740 } 741 } 742 743 /** 744 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 745 * cache it elsewhere. 746 * @return the array of user ids. 747 */ 748 public int[] getUserIds() { 749 synchronized (mPackagesLock) { 750 return mUserIds; 751 } 752 } 753 754 int[] getUserIdsLPr() { 755 return mUserIds; 756 } 757 758 private void readUserListLocked() { 759 if (!mUserListFile.exists()) { 760 fallbackToSingleUserLocked(); 761 return; 762 } 763 FileInputStream fis = null; 764 AtomicFile userListFile = new AtomicFile(mUserListFile); 765 try { 766 fis = userListFile.openRead(); 767 XmlPullParser parser = Xml.newPullParser(); 768 parser.setInput(fis, StandardCharsets.UTF_8.name()); 769 int type; 770 while ((type = parser.next()) != XmlPullParser.START_TAG 771 && type != XmlPullParser.END_DOCUMENT) { 772 ; 773 } 774 775 if (type != XmlPullParser.START_TAG) { 776 Slog.e(LOG_TAG, "Unable to read user list"); 777 fallbackToSingleUserLocked(); 778 return; 779 } 780 781 mNextSerialNumber = -1; 782 if (parser.getName().equals(TAG_USERS)) { 783 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 784 if (lastSerialNumber != null) { 785 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 786 } 787 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 788 if (versionNumber != null) { 789 mUserVersion = Integer.parseInt(versionNumber); 790 } 791 } 792 793 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 794 if (type == XmlPullParser.START_TAG) { 795 final String name = parser.getName(); 796 if (name.equals(TAG_USER)) { 797 String id = parser.getAttributeValue(null, ATTR_ID); 798 UserInfo user = readUserLocked(Integer.parseInt(id)); 799 800 if (user != null) { 801 mUsers.put(user.id, user); 802 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 803 mNextSerialNumber = user.id + 1; 804 } 805 } 806 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 807 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 808 && type != XmlPullParser.END_TAG) { 809 if (type == XmlPullParser.START_TAG) { 810 if (parser.getName().equals(TAG_RESTRICTIONS)) { 811 UserRestrictionsUtils 812 .readRestrictions(parser, mGuestRestrictions); 813 } 814 break; 815 } 816 } 817 } 818 } 819 } 820 updateUserIdsLocked(); 821 upgradeIfNecessaryLocked(); 822 } catch (IOException ioe) { 823 fallbackToSingleUserLocked(); 824 } catch (XmlPullParserException pe) { 825 fallbackToSingleUserLocked(); 826 } finally { 827 if (fis != null) { 828 try { 829 fis.close(); 830 } catch (IOException e) { 831 } 832 } 833 } 834 } 835 836 /** 837 * Upgrade steps between versions, either for fixing bugs or changing the data format. 838 */ 839 private void upgradeIfNecessaryLocked() { 840 int userVersion = mUserVersion; 841 if (userVersion < 1) { 842 // Assign a proper name for the owner, if not initialized correctly before 843 UserInfo user = mUsers.get(UserHandle.USER_SYSTEM); 844 if ("Primary".equals(user.name)) { 845 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 846 scheduleWriteUserLocked(user); 847 } 848 userVersion = 1; 849 } 850 851 if (userVersion < 2) { 852 // Owner should be marked as initialized 853 UserInfo user = mUsers.get(UserHandle.USER_SYSTEM); 854 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 855 user.flags |= UserInfo.FLAG_INITIALIZED; 856 scheduleWriteUserLocked(user); 857 } 858 userVersion = 2; 859 } 860 861 862 if (userVersion < 4) { 863 userVersion = 4; 864 } 865 866 if (userVersion < 5) { 867 initDefaultGuestRestrictions(); 868 userVersion = 5; 869 } 870 871 if (userVersion < 6) { 872 final boolean splitSystemUser = UserManager.isSplitSystemUser(); 873 for (int i = 0; i < mUsers.size(); i++) { 874 UserInfo user = mUsers.valueAt(i); 875 // In non-split mode, only user 0 can have restricted profiles 876 if (!splitSystemUser && user.isRestricted() 877 && (user.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID)) { 878 user.restrictedProfileParentId = UserHandle.USER_SYSTEM; 879 scheduleWriteUserLocked(user); 880 } 881 } 882 userVersion = 6; 883 } 884 885 if (userVersion < USER_VERSION) { 886 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 887 + USER_VERSION); 888 } else { 889 mUserVersion = userVersion; 890 writeUserListLocked(); 891 } 892 } 893 894 private void fallbackToSingleUserLocked() { 895 int flags = UserInfo.FLAG_INITIALIZED; 896 // In split system user mode, the admin and primary flags are assigned to the first human 897 // user. 898 if (!UserManager.isSplitSystemUser()) { 899 flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY; 900 } 901 // Create the system user 902 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 903 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 904 flags); 905 mUsers.put(system.id, system); 906 mNextSerialNumber = MIN_USER_ID; 907 mUserVersion = USER_VERSION; 908 909 Bundle restrictions = new Bundle(); 910 mUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 911 912 updateUserIdsLocked(); 913 initDefaultGuestRestrictions(); 914 915 writeUserListLocked(); 916 writeUserLocked(system); 917 } 918 919 private void scheduleWriteUserLocked(UserInfo userInfo) { 920 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 921 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 922 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 923 } 924 } 925 926 /* 927 * Writes the user file in this format: 928 * 929 * <user flags="20039023" id="0"> 930 * <name>Primary</name> 931 * </user> 932 */ 933 private void writeUserLocked(UserInfo userInfo) { 934 FileOutputStream fos = null; 935 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 936 try { 937 fos = userFile.startWrite(); 938 final BufferedOutputStream bos = new BufferedOutputStream(fos); 939 940 // XmlSerializer serializer = XmlUtils.serializerInstance(); 941 final XmlSerializer serializer = new FastXmlSerializer(); 942 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 943 serializer.startDocument(null, true); 944 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 945 946 serializer.startTag(null, TAG_USER); 947 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 948 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 949 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 950 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 951 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 952 Long.toString(userInfo.lastLoggedInTime)); 953 if (userInfo.iconPath != null) { 954 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 955 } 956 if (userInfo.partial) { 957 serializer.attribute(null, ATTR_PARTIAL, "true"); 958 } 959 if (userInfo.guestToRemove) { 960 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 961 } 962 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 963 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 964 Integer.toString(userInfo.profileGroupId)); 965 } 966 if (userInfo.restrictedProfileParentId != UserInfo.NO_PROFILE_GROUP_ID) { 967 serializer.attribute(null, ATTR_RESTRICTED_PROFILE_PARENT_ID, 968 Integer.toString(userInfo.restrictedProfileParentId)); 969 } 970 serializer.startTag(null, TAG_NAME); 971 serializer.text(userInfo.name); 972 serializer.endTag(null, TAG_NAME); 973 Bundle restrictions = mUserRestrictions.get(userInfo.id); 974 if (restrictions != null) { 975 UserRestrictionsUtils.writeRestrictions(serializer, restrictions, TAG_RESTRICTIONS); 976 } 977 serializer.endTag(null, TAG_USER); 978 979 serializer.endDocument(); 980 userFile.finishWrite(fos); 981 } catch (Exception ioe) { 982 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 983 userFile.failWrite(fos); 984 } 985 } 986 987 /* 988 * Writes the user list file in this format: 989 * 990 * <users nextSerialNumber="3"> 991 * <user id="0"></user> 992 * <user id="2"></user> 993 * </users> 994 */ 995 private void writeUserListLocked() { 996 FileOutputStream fos = null; 997 AtomicFile userListFile = new AtomicFile(mUserListFile); 998 try { 999 fos = userListFile.startWrite(); 1000 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1001 1002 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1003 final XmlSerializer serializer = new FastXmlSerializer(); 1004 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1005 serializer.startDocument(null, true); 1006 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1007 1008 serializer.startTag(null, TAG_USERS); 1009 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 1010 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 1011 1012 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 1013 UserRestrictionsUtils 1014 .writeRestrictions(serializer, mGuestRestrictions, TAG_RESTRICTIONS); 1015 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 1016 final int userSize = mUsers.size(); 1017 for (int i = 0; i < userSize; i++) { 1018 UserInfo user = mUsers.valueAt(i); 1019 serializer.startTag(null, TAG_USER); 1020 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 1021 serializer.endTag(null, TAG_USER); 1022 } 1023 1024 serializer.endTag(null, TAG_USERS); 1025 1026 serializer.endDocument(); 1027 userListFile.finishWrite(fos); 1028 } catch (Exception e) { 1029 userListFile.failWrite(fos); 1030 Slog.e(LOG_TAG, "Error writing user list"); 1031 } 1032 } 1033 1034 private UserInfo readUserLocked(int id) { 1035 int flags = 0; 1036 int serialNumber = id; 1037 String name = null; 1038 String iconPath = null; 1039 long creationTime = 0L; 1040 long lastLoggedInTime = 0L; 1041 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1042 int restrictedProfileParentId = UserInfo.NO_PROFILE_GROUP_ID; 1043 boolean partial = false; 1044 boolean guestToRemove = false; 1045 Bundle restrictions = new Bundle(); 1046 1047 FileInputStream fis = null; 1048 try { 1049 AtomicFile userFile = 1050 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1051 fis = userFile.openRead(); 1052 XmlPullParser parser = Xml.newPullParser(); 1053 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1054 int type; 1055 while ((type = parser.next()) != XmlPullParser.START_TAG 1056 && type != XmlPullParser.END_DOCUMENT) { 1057 ; 1058 } 1059 1060 if (type != XmlPullParser.START_TAG) { 1061 Slog.e(LOG_TAG, "Unable to read user " + id); 1062 return null; 1063 } 1064 1065 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1066 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1067 if (storedId != id) { 1068 Slog.e(LOG_TAG, "User id does not match the file name"); 1069 return null; 1070 } 1071 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1072 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1073 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1074 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1075 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1076 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1077 UserInfo.NO_PROFILE_GROUP_ID); 1078 restrictedProfileParentId = readIntAttribute(parser, 1079 ATTR_RESTRICTED_PROFILE_PARENT_ID, UserInfo.NO_PROFILE_GROUP_ID); 1080 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1081 if ("true".equals(valueString)) { 1082 partial = true; 1083 } 1084 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1085 if ("true".equals(valueString)) { 1086 guestToRemove = true; 1087 } 1088 1089 int outerDepth = parser.getDepth(); 1090 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1091 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1092 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1093 continue; 1094 } 1095 String tag = parser.getName(); 1096 if (TAG_NAME.equals(tag)) { 1097 type = parser.next(); 1098 if (type == XmlPullParser.TEXT) { 1099 name = parser.getText(); 1100 } 1101 } else if (TAG_RESTRICTIONS.equals(tag)) { 1102 UserRestrictionsUtils.readRestrictions(parser, restrictions); 1103 } 1104 } 1105 } 1106 1107 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1108 userInfo.serialNumber = serialNumber; 1109 userInfo.creationTime = creationTime; 1110 userInfo.lastLoggedInTime = lastLoggedInTime; 1111 userInfo.partial = partial; 1112 userInfo.guestToRemove = guestToRemove; 1113 userInfo.profileGroupId = profileGroupId; 1114 userInfo.restrictedProfileParentId = restrictedProfileParentId; 1115 mUserRestrictions.append(id, restrictions); 1116 return userInfo; 1117 1118 } catch (IOException ioe) { 1119 } catch (XmlPullParserException pe) { 1120 } finally { 1121 if (fis != null) { 1122 try { 1123 fis.close(); 1124 } catch (IOException e) { 1125 } 1126 } 1127 } 1128 return null; 1129 } 1130 1131 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1132 String valueString = parser.getAttributeValue(null, attr); 1133 if (valueString == null) return defaultValue; 1134 try { 1135 return Integer.parseInt(valueString); 1136 } catch (NumberFormatException nfe) { 1137 return defaultValue; 1138 } 1139 } 1140 1141 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1142 String valueString = parser.getAttributeValue(null, attr); 1143 if (valueString == null) return defaultValue; 1144 try { 1145 return Long.parseLong(valueString); 1146 } catch (NumberFormatException nfe) { 1147 return defaultValue; 1148 } 1149 } 1150 1151 private boolean isPackageInstalled(String pkg, int userId) { 1152 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1153 PackageManager.GET_UNINSTALLED_PACKAGES, 1154 userId); 1155 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1156 return false; 1157 } 1158 return true; 1159 } 1160 1161 /** 1162 * Removes all the restrictions files (res_<packagename>) for a given user. 1163 * Does not do any permissions checking. 1164 */ 1165 private void cleanAppRestrictions(int userId) { 1166 synchronized (mPackagesLock) { 1167 File dir = Environment.getUserSystemDirectory(userId); 1168 String[] files = dir.list(); 1169 if (files == null) return; 1170 for (String fileName : files) { 1171 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1172 File resFile = new File(dir, fileName); 1173 if (resFile.exists()) { 1174 resFile.delete(); 1175 } 1176 } 1177 } 1178 } 1179 } 1180 1181 /** 1182 * Removes the app restrictions file for a specific package and user id, if it exists. 1183 */ 1184 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1185 synchronized (mPackagesLock) { 1186 File dir = Environment.getUserSystemDirectory(userId); 1187 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1188 if (resFile.exists()) { 1189 resFile.delete(); 1190 } 1191 } 1192 } 1193 1194 @Override 1195 public UserInfo createProfileForUser(String name, int flags, int userId) { 1196 checkManageUsersPermission("Only the system can create users"); 1197 return createUserInternal(name, flags, userId); 1198 } 1199 1200 @Override 1201 public UserInfo createUser(String name, int flags) { 1202 checkManageUsersPermission("Only the system can create users"); 1203 return createUserInternal(name, flags, UserHandle.USER_NULL); 1204 } 1205 1206 private UserInfo createUserInternal(String name, int flags, int parentId) { 1207 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1208 UserManager.DISALLOW_ADD_USER, false)) { 1209 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1210 return null; 1211 } 1212 if (ActivityManager.isLowRamDeviceStatic()) { 1213 return null; 1214 } 1215 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1216 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1217 final boolean isRestricted = (flags & UserInfo.FLAG_RESTRICTED) != 0; 1218 final long ident = Binder.clearCallingIdentity(); 1219 UserInfo userInfo = null; 1220 final int userId; 1221 try { 1222 synchronized (mInstallLock) { 1223 synchronized (mPackagesLock) { 1224 UserInfo parent = null; 1225 if (parentId != UserHandle.USER_NULL) { 1226 parent = getUserInfoLocked(parentId); 1227 if (parent == null) return null; 1228 } 1229 if (isManagedProfile && !canAddMoreManagedProfiles(parentId)) { 1230 Log.e(LOG_TAG, "Cannot add more managed profiles for user " + parentId); 1231 return null; 1232 } 1233 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1234 // If we're not adding a guest user or a managed profile and the limit has 1235 // been reached, cannot add a user. 1236 return null; 1237 } 1238 // If we're adding a guest and there already exists one, bail. 1239 if (isGuest && findCurrentGuestUserLocked() != null) { 1240 return null; 1241 } 1242 // In legacy mode, restricted profile's parent can only be the owner user 1243 if (isRestricted && !UserManager.isSplitSystemUser() 1244 && (parentId != UserHandle.USER_SYSTEM)) { 1245 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1246 return null; 1247 } 1248 if (isRestricted && UserManager.isSplitSystemUser()) { 1249 if (parent == null) { 1250 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be " 1251 + "specified"); 1252 return null; 1253 } 1254 if (!parent.canHaveProfile()) { 1255 Log.w(LOG_TAG, "Cannot add restricted profile - profiles cannot be " 1256 + "created for the specified parent user id " + parentId); 1257 return null; 1258 } 1259 } 1260 // In split system user mode, we assign the first human user the primary flag. 1261 // And if there is no device owner, we also assign the admin flag to primary 1262 // user. 1263 if (UserManager.isSplitSystemUser() 1264 && !isGuest && !isManagedProfile && getPrimaryUser() == null) { 1265 flags |= UserInfo.FLAG_PRIMARY; 1266 DevicePolicyManager devicePolicyManager = (DevicePolicyManager) 1267 mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); 1268 if (devicePolicyManager == null 1269 || devicePolicyManager.getDeviceOwner() == null) { 1270 flags |= UserInfo.FLAG_ADMIN; 1271 } 1272 } 1273 userId = getNextAvailableIdLocked(); 1274 userInfo = new UserInfo(userId, name, null, flags); 1275 userInfo.serialNumber = mNextSerialNumber++; 1276 long now = System.currentTimeMillis(); 1277 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1278 userInfo.partial = true; 1279 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1280 mUsers.put(userId, userInfo); 1281 writeUserListLocked(); 1282 if (parent != null) { 1283 if (isManagedProfile) { 1284 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1285 parent.profileGroupId = parent.id; 1286 scheduleWriteUserLocked(parent); 1287 } 1288 userInfo.profileGroupId = parent.profileGroupId; 1289 } else if (isRestricted) { 1290 if (!parent.canHaveProfile()) { 1291 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1292 } 1293 if (parent.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID) { 1294 parent.restrictedProfileParentId = parent.id; 1295 scheduleWriteUserLocked(parent); 1296 } 1297 userInfo.restrictedProfileParentId = parent.restrictedProfileParentId; 1298 } 1299 } 1300 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1301 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1302 final String volumeUuid = vol.getFsUuid(); 1303 try { 1304 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1305 userId); 1306 prepareUserDirectory(mContext, volumeUuid, userId); 1307 enforceSerialNumber(userDir, userInfo.serialNumber); 1308 } catch (IOException e) { 1309 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1310 } 1311 } 1312 mPm.createNewUserLILPw(userId); 1313 userInfo.partial = false; 1314 scheduleWriteUserLocked(userInfo); 1315 updateUserIdsLocked(); 1316 Bundle restrictions = new Bundle(); 1317 mUserRestrictions.append(userId, restrictions); 1318 } 1319 } 1320 mPm.newUserCreated(userId); 1321 if (userInfo != null) { 1322 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1323 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1324 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1325 android.Manifest.permission.MANAGE_USERS); 1326 } 1327 } finally { 1328 Binder.restoreCallingIdentity(ident); 1329 } 1330 return userInfo; 1331 } 1332 1333 /** 1334 * @hide 1335 */ 1336 public UserInfo createRestrictedProfile(String name, int parentUserId) { 1337 checkManageUsersPermission("setupRestrictedProfile"); 1338 final UserInfo user = createProfileForUser(name, UserInfo.FLAG_RESTRICTED, parentUserId); 1339 if (user == null) { 1340 return null; 1341 } 1342 setUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS, true, user.id); 1343 // Change the setting before applying the DISALLOW_SHARE_LOCATION restriction, otherwise 1344 // the putIntForUser() will fail. 1345 android.provider.Settings.Secure.putIntForUser(mContext.getContentResolver(), 1346 android.provider.Settings.Secure.LOCATION_MODE, 1347 android.provider.Settings.Secure.LOCATION_MODE_OFF, user.id); 1348 setUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, true, user.id); 1349 return user; 1350 } 1351 1352 /** 1353 * Find the current guest user. If the Guest user is partial, 1354 * then do not include it in the results as it is about to die. 1355 */ 1356 private UserInfo findCurrentGuestUserLocked() { 1357 final int size = mUsers.size(); 1358 for (int i = 0; i < size; i++) { 1359 final UserInfo user = mUsers.valueAt(i); 1360 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1361 return user; 1362 } 1363 } 1364 return null; 1365 } 1366 1367 /** 1368 * Mark this guest user for deletion to allow us to create another guest 1369 * and switch to that user before actually removing this guest. 1370 * @param userHandle the userid of the current guest 1371 * @return whether the user could be marked for deletion 1372 */ 1373 public boolean markGuestForDeletion(int userHandle) { 1374 checkManageUsersPermission("Only the system can remove users"); 1375 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1376 UserManager.DISALLOW_REMOVE_USER, false)) { 1377 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1378 return false; 1379 } 1380 1381 long ident = Binder.clearCallingIdentity(); 1382 try { 1383 final UserInfo user; 1384 synchronized (mPackagesLock) { 1385 user = mUsers.get(userHandle); 1386 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1387 return false; 1388 } 1389 if (!user.isGuest()) { 1390 return false; 1391 } 1392 // We set this to a guest user that is to be removed. This is a temporary state 1393 // where we are allowed to add new Guest users, even if this one is still not 1394 // removed. This user will still show up in getUserInfo() calls. 1395 // If we don't get around to removing this Guest user, it will be purged on next 1396 // startup. 1397 user.guestToRemove = true; 1398 // Mark it as disabled, so that it isn't returned any more when 1399 // profiles are queried. 1400 user.flags |= UserInfo.FLAG_DISABLED; 1401 writeUserLocked(user); 1402 } 1403 } finally { 1404 Binder.restoreCallingIdentity(ident); 1405 } 1406 return true; 1407 } 1408 1409 /** 1410 * Removes a user and all data directories created for that user. This method should be called 1411 * after the user's processes have been terminated. 1412 * @param userHandle the user's id 1413 */ 1414 public boolean removeUser(int userHandle) { 1415 checkManageUsersPermission("Only the system can remove users"); 1416 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1417 UserManager.DISALLOW_REMOVE_USER, false)) { 1418 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1419 return false; 1420 } 1421 1422 long ident = Binder.clearCallingIdentity(); 1423 try { 1424 final UserInfo user; 1425 int currentUser = ActivityManager.getCurrentUser(); 1426 if (currentUser == userHandle) { 1427 Log.w(LOG_TAG, "Current user cannot be removed"); 1428 return false; 1429 } 1430 synchronized (mPackagesLock) { 1431 user = mUsers.get(userHandle); 1432 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1433 return false; 1434 } 1435 1436 // We remember deleted user IDs to prevent them from being 1437 // reused during the current boot; they can still be reused 1438 // after a reboot. 1439 mRemovingUserIds.put(userHandle, true); 1440 1441 try { 1442 mAppOpsService.removeUser(userHandle); 1443 } catch (RemoteException e) { 1444 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1445 } 1446 // Set this to a partially created user, so that the user will be purged 1447 // on next startup, in case the runtime stops now before stopping and 1448 // removing the user completely. 1449 user.partial = true; 1450 // Mark it as disabled, so that it isn't returned any more when 1451 // profiles are queried. 1452 user.flags |= UserInfo.FLAG_DISABLED; 1453 writeUserLocked(user); 1454 } 1455 1456 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1457 && user.isManagedProfile()) { 1458 // Send broadcast to notify system that the user removed was a 1459 // managed user. 1460 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1461 } 1462 1463 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1464 int res; 1465 try { 1466 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1467 new IStopUserCallback.Stub() { 1468 @Override 1469 public void userStopped(int userId) { 1470 finishRemoveUser(userId); 1471 } 1472 @Override 1473 public void userStopAborted(int userId) { 1474 } 1475 }); 1476 } catch (RemoteException e) { 1477 return false; 1478 } 1479 return res == ActivityManager.USER_OP_SUCCESS; 1480 } finally { 1481 Binder.restoreCallingIdentity(ident); 1482 } 1483 } 1484 1485 void finishRemoveUser(final int userHandle) { 1486 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1487 // Let other services shutdown any activity and clean up their state before completely 1488 // wiping the user's system directory and removing from the user list 1489 long ident = Binder.clearCallingIdentity(); 1490 try { 1491 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1492 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1493 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1494 android.Manifest.permission.MANAGE_USERS, 1495 1496 new BroadcastReceiver() { 1497 @Override 1498 public void onReceive(Context context, Intent intent) { 1499 if (DBG) { 1500 Slog.i(LOG_TAG, 1501 "USER_REMOVED broadcast sent, cleaning up user data " 1502 + userHandle); 1503 } 1504 new Thread() { 1505 public void run() { 1506 // Clean up any ActivityManager state 1507 LocalServices.getService(ActivityManagerInternal.class) 1508 .onUserRemoved(userHandle); 1509 synchronized (mInstallLock) { 1510 synchronized (mPackagesLock) { 1511 removeUserStateLocked(userHandle); 1512 } 1513 } 1514 } 1515 }.start(); 1516 } 1517 }, 1518 1519 null, Activity.RESULT_OK, null, null); 1520 } finally { 1521 Binder.restoreCallingIdentity(ident); 1522 } 1523 } 1524 1525 private void removeUserStateLocked(final int userHandle) { 1526 mContext.getSystemService(StorageManager.class) 1527 .deleteUserKey(userHandle); 1528 // Cleanup package manager settings 1529 mPm.cleanUpUserLILPw(this, userHandle); 1530 1531 // Remove this user from the list 1532 mUsers.remove(userHandle); 1533 // Remove user file 1534 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1535 userFile.delete(); 1536 // Update the user list 1537 writeUserListLocked(); 1538 updateUserIdsLocked(); 1539 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1540 } 1541 1542 private void removeDirectoryRecursive(File parent) { 1543 if (parent.isDirectory()) { 1544 String[] files = parent.list(); 1545 for (String filename : files) { 1546 File child = new File(parent, filename); 1547 removeDirectoryRecursive(child); 1548 } 1549 } 1550 parent.delete(); 1551 } 1552 1553 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1554 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1555 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1556 Intent.FLAG_RECEIVER_FOREGROUND); 1557 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1558 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1559 } 1560 1561 @Override 1562 public Bundle getApplicationRestrictions(String packageName) { 1563 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1564 } 1565 1566 @Override 1567 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1568 if (UserHandle.getCallingUserId() != userId 1569 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1570 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1571 } 1572 synchronized (mPackagesLock) { 1573 // Read the restrictions from XML 1574 return readApplicationRestrictionsLocked(packageName, userId); 1575 } 1576 } 1577 1578 @Override 1579 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1580 int userId) { 1581 if (UserHandle.getCallingUserId() != userId 1582 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1583 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1584 } 1585 synchronized (mPackagesLock) { 1586 if (restrictions == null || restrictions.isEmpty()) { 1587 cleanAppRestrictionsForPackage(packageName, userId); 1588 } else { 1589 // Write the restrictions to XML 1590 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1591 } 1592 } 1593 1594 if (isPackageInstalled(packageName, userId)) { 1595 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1596 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1597 changeIntent.setPackage(packageName); 1598 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1599 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1600 } 1601 } 1602 1603 @Override 1604 public void removeRestrictions() { 1605 checkManageUsersPermission("Only system can remove restrictions"); 1606 final int userHandle = UserHandle.getCallingUserId(); 1607 removeRestrictionsForUser(userHandle, true); 1608 } 1609 1610 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1611 synchronized (mPackagesLock) { 1612 // Remove all user restrictions 1613 setUserRestrictions(new Bundle(), userHandle); 1614 // Remove any app restrictions 1615 cleanAppRestrictions(userHandle); 1616 } 1617 if (unhideApps) { 1618 unhideAllInstalledAppsForUser(userHandle); 1619 } 1620 } 1621 1622 private void unhideAllInstalledAppsForUser(final int userHandle) { 1623 mHandler.post(new Runnable() { 1624 @Override 1625 public void run() { 1626 List<ApplicationInfo> apps = 1627 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1628 userHandle).getList(); 1629 final long ident = Binder.clearCallingIdentity(); 1630 try { 1631 for (ApplicationInfo appInfo : apps) { 1632 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1633 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1634 != 0) { 1635 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1636 userHandle); 1637 } 1638 } 1639 } finally { 1640 Binder.restoreCallingIdentity(ident); 1641 } 1642 } 1643 }); 1644 } 1645 private int getUidForPackage(String packageName) { 1646 long ident = Binder.clearCallingIdentity(); 1647 try { 1648 return mContext.getPackageManager().getApplicationInfo(packageName, 1649 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1650 } catch (NameNotFoundException nnfe) { 1651 return -1; 1652 } finally { 1653 Binder.restoreCallingIdentity(ident); 1654 } 1655 } 1656 1657 private Bundle readApplicationRestrictionsLocked(String packageName, 1658 int userId) { 1659 AtomicFile restrictionsFile = 1660 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1661 packageToRestrictionsFileName(packageName))); 1662 return readApplicationRestrictionsLocked(restrictionsFile); 1663 } 1664 1665 @VisibleForTesting 1666 static Bundle readApplicationRestrictionsLocked(AtomicFile restrictionsFile) { 1667 final Bundle restrictions = new Bundle(); 1668 final ArrayList<String> values = new ArrayList<>(); 1669 if (!restrictionsFile.getBaseFile().exists()) { 1670 return restrictions; 1671 } 1672 1673 FileInputStream fis = null; 1674 try { 1675 fis = restrictionsFile.openRead(); 1676 XmlPullParser parser = Xml.newPullParser(); 1677 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1678 XmlUtils.nextElement(parser); 1679 if (parser.getEventType() != XmlPullParser.START_TAG) { 1680 Slog.e(LOG_TAG, "Unable to read restrictions file " 1681 + restrictionsFile.getBaseFile()); 1682 return restrictions; 1683 } 1684 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1685 readEntry(restrictions, values, parser); 1686 } 1687 } catch (IOException|XmlPullParserException e) { 1688 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1689 } finally { 1690 IoUtils.closeQuietly(fis); 1691 } 1692 return restrictions; 1693 } 1694 1695 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1696 XmlPullParser parser) throws XmlPullParserException, IOException { 1697 int type = parser.getEventType(); 1698 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1699 String key = parser.getAttributeValue(null, ATTR_KEY); 1700 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1701 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1702 if (multiple != null) { 1703 values.clear(); 1704 int count = Integer.parseInt(multiple); 1705 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1706 if (type == XmlPullParser.START_TAG 1707 && parser.getName().equals(TAG_VALUE)) { 1708 values.add(parser.nextText().trim()); 1709 count--; 1710 } 1711 } 1712 String [] valueStrings = new String[values.size()]; 1713 values.toArray(valueStrings); 1714 restrictions.putStringArray(key, valueStrings); 1715 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1716 restrictions.putBundle(key, readBundleEntry(parser, values)); 1717 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1718 final int outerDepth = parser.getDepth(); 1719 ArrayList<Bundle> bundleList = new ArrayList<>(); 1720 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1721 Bundle childBundle = readBundleEntry(parser, values); 1722 bundleList.add(childBundle); 1723 } 1724 restrictions.putParcelableArray(key, 1725 bundleList.toArray(new Bundle[bundleList.size()])); 1726 } else { 1727 String value = parser.nextText().trim(); 1728 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1729 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1730 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1731 restrictions.putInt(key, Integer.parseInt(value)); 1732 } else { 1733 restrictions.putString(key, value); 1734 } 1735 } 1736 } 1737 } 1738 1739 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1740 throws IOException, XmlPullParserException { 1741 Bundle childBundle = new Bundle(); 1742 final int outerDepth = parser.getDepth(); 1743 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1744 readEntry(childBundle, values, parser); 1745 } 1746 return childBundle; 1747 } 1748 1749 private void writeApplicationRestrictionsLocked(String packageName, 1750 Bundle restrictions, int userId) { 1751 AtomicFile restrictionsFile = new AtomicFile( 1752 new File(Environment.getUserSystemDirectory(userId), 1753 packageToRestrictionsFileName(packageName))); 1754 writeApplicationRestrictionsLocked(restrictions, restrictionsFile); 1755 } 1756 1757 @VisibleForTesting 1758 static void writeApplicationRestrictionsLocked(Bundle restrictions, 1759 AtomicFile restrictionsFile) { 1760 FileOutputStream fos = null; 1761 try { 1762 fos = restrictionsFile.startWrite(); 1763 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1764 1765 final XmlSerializer serializer = new FastXmlSerializer(); 1766 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1767 serializer.startDocument(null, true); 1768 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1769 1770 serializer.startTag(null, TAG_RESTRICTIONS); 1771 writeBundle(restrictions, serializer); 1772 serializer.endTag(null, TAG_RESTRICTIONS); 1773 1774 serializer.endDocument(); 1775 restrictionsFile.finishWrite(fos); 1776 } catch (Exception e) { 1777 restrictionsFile.failWrite(fos); 1778 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 1779 } 1780 } 1781 1782 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1783 throws IOException { 1784 for (String key : restrictions.keySet()) { 1785 Object value = restrictions.get(key); 1786 serializer.startTag(null, TAG_ENTRY); 1787 serializer.attribute(null, ATTR_KEY, key); 1788 1789 if (value instanceof Boolean) { 1790 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1791 serializer.text(value.toString()); 1792 } else if (value instanceof Integer) { 1793 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1794 serializer.text(value.toString()); 1795 } else if (value == null || value instanceof String) { 1796 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1797 serializer.text(value != null ? (String) value : ""); 1798 } else if (value instanceof Bundle) { 1799 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1800 writeBundle((Bundle) value, serializer); 1801 } else if (value instanceof Parcelable[]) { 1802 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 1803 Parcelable[] array = (Parcelable[]) value; 1804 for (Parcelable parcelable : array) { 1805 if (!(parcelable instanceof Bundle)) { 1806 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 1807 } 1808 serializer.startTag(null, TAG_ENTRY); 1809 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1810 writeBundle((Bundle) parcelable, serializer); 1811 serializer.endTag(null, TAG_ENTRY); 1812 } 1813 } else { 1814 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1815 String[] values = (String[]) value; 1816 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1817 for (String choice : values) { 1818 serializer.startTag(null, TAG_VALUE); 1819 serializer.text(choice != null ? choice : ""); 1820 serializer.endTag(null, TAG_VALUE); 1821 } 1822 } 1823 serializer.endTag(null, TAG_ENTRY); 1824 } 1825 } 1826 1827 @Override 1828 public int getUserSerialNumber(int userHandle) { 1829 synchronized (mPackagesLock) { 1830 if (!exists(userHandle)) return -1; 1831 return getUserInfoLocked(userHandle).serialNumber; 1832 } 1833 } 1834 1835 @Override 1836 public int getUserHandle(int userSerialNumber) { 1837 synchronized (mPackagesLock) { 1838 for (int userId : mUserIds) { 1839 UserInfo info = getUserInfoLocked(userId); 1840 if (info != null && info.serialNumber == userSerialNumber) return userId; 1841 } 1842 // Not found 1843 return -1; 1844 } 1845 } 1846 1847 @Override 1848 public long getUserCreationTime(int userHandle) { 1849 int callingUserId = UserHandle.getCallingUserId(); 1850 UserInfo userInfo = null; 1851 synchronized (mPackagesLock) { 1852 if (callingUserId == userHandle) { 1853 userInfo = getUserInfoLocked(userHandle); 1854 } else { 1855 UserInfo parent = getProfileParentLocked(userHandle); 1856 if (parent != null && parent.id == callingUserId) { 1857 userInfo = getUserInfoLocked(userHandle); 1858 } 1859 } 1860 } 1861 if (userInfo == null) { 1862 throw new SecurityException("userHandle can only be the calling user or a managed " 1863 + "profile associated with this user"); 1864 } 1865 return userInfo.creationTime; 1866 } 1867 1868 /** 1869 * Caches the list of user ids in an array, adjusting the array size when necessary. 1870 */ 1871 private void updateUserIdsLocked() { 1872 int num = 0; 1873 final int userSize = mUsers.size(); 1874 for (int i = 0; i < userSize; i++) { 1875 if (!mUsers.valueAt(i).partial) { 1876 num++; 1877 } 1878 } 1879 final int[] newUsers = new int[num]; 1880 int n = 0; 1881 for (int i = 0; i < userSize; i++) { 1882 if (!mUsers.valueAt(i).partial) { 1883 newUsers[n++] = mUsers.keyAt(i); 1884 } 1885 } 1886 mUserIds = newUsers; 1887 } 1888 1889 /** 1890 * Make a note of the last started time of a user and do some cleanup. 1891 * @param userId the user that was just foregrounded 1892 */ 1893 public void onUserForeground(int userId) { 1894 synchronized (mPackagesLock) { 1895 UserInfo user = mUsers.get(userId); 1896 long now = System.currentTimeMillis(); 1897 if (user == null || user.partial) { 1898 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1899 return; 1900 } 1901 if (now > EPOCH_PLUS_30_YEARS) { 1902 user.lastLoggedInTime = now; 1903 scheduleWriteUserLocked(user); 1904 } 1905 } 1906 } 1907 1908 /** 1909 * Returns the next available user id, filling in any holes in the ids. 1910 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1911 * for data and battery stats collection, or unexpected cross-talk. 1912 * @return 1913 */ 1914 private int getNextAvailableIdLocked() { 1915 synchronized (mPackagesLock) { 1916 int i = MIN_USER_ID; 1917 while (i < MAX_USER_ID) { 1918 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1919 return i; 1920 } 1921 i++; 1922 } 1923 } 1924 throw new IllegalStateException("No user id available!"); 1925 } 1926 1927 private String packageToRestrictionsFileName(String packageName) { 1928 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1929 } 1930 1931 /** 1932 * Create new {@code /data/user/[id]} directory and sets default 1933 * permissions. 1934 */ 1935 public static void prepareUserDirectory(Context context, String volumeUuid, int userId) { 1936 final StorageManager storage = context.getSystemService(StorageManager.class); 1937 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 1938 storage.createNewUserDir(userId, userDir); 1939 } 1940 1941 /** 1942 * Enforce that serial number stored in user directory inode matches the 1943 * given expected value. Gracefully sets the serial number if currently 1944 * undefined. 1945 * 1946 * @throws IOException when problem extracting serial number, or serial 1947 * number is mismatched. 1948 */ 1949 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 1950 final int foundSerial = getSerialNumber(file); 1951 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 1952 1953 if (foundSerial == -1) { 1954 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 1955 try { 1956 setSerialNumber(file, serialNumber); 1957 } catch (IOException e) { 1958 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 1959 } 1960 1961 } else if (foundSerial != serialNumber) { 1962 throw new IOException("Found serial number " + foundSerial 1963 + " doesn't match expected " + serialNumber); 1964 } 1965 } 1966 1967 /** 1968 * Set serial number stored in user directory inode. 1969 * 1970 * @throws IOException if serial number was already set 1971 */ 1972 private static void setSerialNumber(File file, int serialNumber) 1973 throws IOException { 1974 try { 1975 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 1976 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 1977 } catch (ErrnoException e) { 1978 throw e.rethrowAsIOException(); 1979 } 1980 } 1981 1982 /** 1983 * Return serial number stored in user directory inode. 1984 * 1985 * @return parsed serial number, or -1 if not set 1986 */ 1987 private static int getSerialNumber(File file) throws IOException { 1988 try { 1989 final byte[] buf = new byte[256]; 1990 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 1991 final String serial = new String(buf, 0, len); 1992 try { 1993 return Integer.parseInt(serial); 1994 } catch (NumberFormatException e) { 1995 throw new IOException("Bad serial number: " + serial); 1996 } 1997 } catch (ErrnoException e) { 1998 if (e.errno == OsConstants.ENODATA) { 1999 return -1; 2000 } else { 2001 throw e.rethrowAsIOException(); 2002 } 2003 } 2004 } 2005 2006 @Override 2007 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2008 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 2009 != PackageManager.PERMISSION_GRANTED) { 2010 pw.println("Permission Denial: can't dump UserManager from from pid=" 2011 + Binder.getCallingPid() 2012 + ", uid=" + Binder.getCallingUid() 2013 + " without permission " 2014 + android.Manifest.permission.DUMP); 2015 return; 2016 } 2017 2018 long now = System.currentTimeMillis(); 2019 StringBuilder sb = new StringBuilder(); 2020 synchronized (mPackagesLock) { 2021 pw.println("Users:"); 2022 for (int i = 0; i < mUsers.size(); i++) { 2023 UserInfo user = mUsers.valueAt(i); 2024 if (user == null) continue; 2025 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 2026 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 2027 if (user.partial) pw.print(" <partial>"); 2028 pw.println(); 2029 pw.print(" Created: "); 2030 if (user.creationTime == 0) { 2031 pw.println("<unknown>"); 2032 } else { 2033 sb.setLength(0); 2034 TimeUtils.formatDuration(now - user.creationTime, sb); 2035 sb.append(" ago"); 2036 pw.println(sb); 2037 } 2038 pw.print(" Last logged in: "); 2039 if (user.lastLoggedInTime == 0) { 2040 pw.println("<unknown>"); 2041 } else { 2042 sb.setLength(0); 2043 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2044 sb.append(" ago"); 2045 pw.println(sb); 2046 } 2047 pw.println(" Restrictions:"); 2048 UserRestrictionsUtils.dumpRestrictions( 2049 pw, " ", mUserRestrictions.get(user.id)); 2050 } 2051 pw.println(); 2052 pw.println("Guest restrictions:"); 2053 UserRestrictionsUtils.dumpRestrictions(pw, " ", mGuestRestrictions); 2054 } 2055 } 2056 2057 final class MainHandler extends Handler { 2058 2059 @Override 2060 public void handleMessage(Message msg) { 2061 switch (msg.what) { 2062 case WRITE_USER_MSG: 2063 removeMessages(WRITE_USER_MSG, msg.obj); 2064 synchronized (mPackagesLock) { 2065 int userId = ((UserInfo) msg.obj).id; 2066 UserInfo userInfo = mUsers.get(userId); 2067 if (userInfo != null) { 2068 writeUserLocked(userInfo); 2069 } 2070 } 2071 } 2072 } 2073 } 2074 2075 /** 2076 * @param userId 2077 * @return whether the user has been initialized yet 2078 */ 2079 boolean isInitialized(int userId) { 2080 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2081 } 2082} 2083