UserManagerService.java revision 4f11754f72ac4c60448b36a1a933cdc2d7bc1870
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 static android.text.format.DateUtils.MINUTE_IN_MILLIS; 20 21import android.app.Activity; 22import android.app.ActivityManager; 23import android.app.ActivityManagerNative; 24import android.app.IStopUserCallback; 25import android.content.BroadcastReceiver; 26import android.content.Context; 27import android.content.Intent; 28import android.content.pm.ApplicationInfo; 29import android.content.pm.PackageManager; 30import android.content.pm.PackageManager.NameNotFoundException; 31import android.content.pm.UserInfo; 32import android.graphics.Bitmap; 33import android.graphics.BitmapFactory; 34import android.os.Binder; 35import android.os.Bundle; 36import android.os.Debug; 37import android.os.Environment; 38import android.os.FileUtils; 39import android.os.Handler; 40import android.os.IUserManager; 41import android.os.Process; 42import android.os.RemoteException; 43import android.os.ServiceManager; 44import android.os.UserHandle; 45import android.os.UserManager; 46import android.util.AtomicFile; 47import android.util.Log; 48import android.util.Slog; 49import android.util.SparseArray; 50import android.util.SparseBooleanArray; 51import android.util.TimeUtils; 52import android.util.Xml; 53 54import com.android.internal.app.IAppOpsService; 55import com.android.internal.util.ArrayUtils; 56import com.android.internal.util.FastXmlSerializer; 57 58import org.xmlpull.v1.XmlPullParser; 59import org.xmlpull.v1.XmlPullParserException; 60import org.xmlpull.v1.XmlSerializer; 61 62import java.io.BufferedOutputStream; 63import java.io.File; 64import java.io.FileDescriptor; 65import java.io.FileInputStream; 66import java.io.FileNotFoundException; 67import java.io.FileOutputStream; 68import java.io.IOException; 69import java.io.PrintWriter; 70import java.security.MessageDigest; 71import java.security.NoSuchAlgorithmException; 72import java.security.SecureRandom; 73import java.nio.charset.StandardCharsets; 74import java.util.ArrayList; 75import java.util.List; 76 77public class UserManagerService extends IUserManager.Stub { 78 79 private static final String LOG_TAG = "UserManagerService"; 80 81 private static final boolean DBG = false; 82 83 private static final String TAG_NAME = "name"; 84 private static final String ATTR_FLAGS = "flags"; 85 private static final String ATTR_ICON_PATH = "icon"; 86 private static final String ATTR_ID = "id"; 87 private static final String ATTR_CREATION_TIME = "created"; 88 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 89 private static final String ATTR_SALT = "salt"; 90 private static final String ATTR_PIN_HASH = "pinHash"; 91 private static final String ATTR_FAILED_ATTEMPTS = "failedAttempts"; 92 private static final String ATTR_LAST_RETRY_MS = "lastAttemptMs"; 93 private static final String ATTR_SERIAL_NO = "serialNumber"; 94 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 95 private static final String ATTR_PARTIAL = "partial"; 96 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 97 private static final String ATTR_USER_VERSION = "version"; 98 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 99 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 100 private static final String TAG_USERS = "users"; 101 private static final String TAG_USER = "user"; 102 private static final String TAG_RESTRICTIONS = "restrictions"; 103 private static final String TAG_ENTRY = "entry"; 104 private static final String TAG_VALUE = "value"; 105 private static final String ATTR_KEY = "key"; 106 private static final String ATTR_VALUE_TYPE = "type"; 107 private static final String ATTR_MULTIPLE = "m"; 108 109 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 110 private static final String ATTR_TYPE_STRING = "s"; 111 private static final String ATTR_TYPE_BOOLEAN = "b"; 112 private static final String ATTR_TYPE_INTEGER = "i"; 113 114 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 115 private static final String USER_LIST_FILENAME = "userlist.xml"; 116 private static final String USER_PHOTO_FILENAME = "photo.png"; 117 118 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 119 private static final String XML_SUFFIX = ".xml"; 120 121 private static final int MIN_USER_ID = 10; 122 123 private static final int USER_VERSION = 5; 124 125 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 126 127 // Number of attempts before jumping to the next BACKOFF_TIMES slot 128 private static final int BACKOFF_INC_INTERVAL = 5; 129 130 // Maximum number of managed profiles permitted is 1. This cannot be increased 131 // without first making sure that the rest of the framework is prepared for it. 132 private static final int MAX_MANAGED_PROFILES = 1; 133 134 // Amount of time to force the user to wait before entering the PIN again, after failing 135 // BACKOFF_INC_INTERVAL times. 136 private static final int[] BACKOFF_TIMES = { 0, 30*1000, 60*1000, 5*60*1000, 30*60*1000 }; 137 138 139 private final Context mContext; 140 private final PackageManagerService mPm; 141 private final Object mInstallLock; 142 private final Object mPackagesLock; 143 144 private final Handler mHandler; 145 146 private final File mUsersDir; 147 private final File mUserListFile; 148 private final File mBaseUserPath; 149 150 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 151 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 152 private final Bundle mGuestRestrictions = new Bundle(); 153 154 class RestrictionsPinState { 155 long salt; 156 String pinHash; 157 int failedAttempts; 158 long lastAttemptTime; 159 } 160 161 private final SparseArray<RestrictionsPinState> mRestrictionsPinStates = 162 new SparseArray<RestrictionsPinState>(); 163 164 /** 165 * Set of user IDs being actively removed. Removed IDs linger in this set 166 * for several seconds to work around a VFS caching issue. 167 */ 168 // @GuardedBy("mPackagesLock") 169 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 170 171 private int[] mUserIds; 172 private int mNextSerialNumber; 173 private int mUserVersion = 0; 174 175 private IAppOpsService mAppOpsService; 176 177 private static UserManagerService sInstance; 178 179 public static UserManagerService getInstance() { 180 synchronized (UserManagerService.class) { 181 return sInstance; 182 } 183 } 184 185 /** 186 * Available for testing purposes. 187 */ 188 UserManagerService(File dataDir, File baseUserPath) { 189 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 190 } 191 192 /** 193 * Called by package manager to create the service. This is closely 194 * associated with the package manager, and the given lock is the 195 * package manager's own lock. 196 */ 197 UserManagerService(Context context, PackageManagerService pm, 198 Object installLock, Object packagesLock) { 199 this(context, pm, installLock, packagesLock, 200 Environment.getDataDirectory(), 201 new File(Environment.getDataDirectory(), "user")); 202 } 203 204 /** 205 * Available for testing purposes. 206 */ 207 private UserManagerService(Context context, PackageManagerService pm, 208 Object installLock, Object packagesLock, 209 File dataDir, File baseUserPath) { 210 mContext = context; 211 mPm = pm; 212 mInstallLock = installLock; 213 mPackagesLock = packagesLock; 214 mHandler = new Handler(); 215 synchronized (mInstallLock) { 216 synchronized (mPackagesLock) { 217 mUsersDir = new File(dataDir, USER_INFO_DIR); 218 mUsersDir.mkdirs(); 219 // Make zeroth user directory, for services to migrate their files to that location 220 File userZeroDir = new File(mUsersDir, "0"); 221 userZeroDir.mkdirs(); 222 mBaseUserPath = baseUserPath; 223 FileUtils.setPermissions(mUsersDir.toString(), 224 FileUtils.S_IRWXU|FileUtils.S_IRWXG 225 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 226 -1, -1); 227 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 228 initDefaultGuestRestrictions(); 229 readUserListLocked(); 230 // Prune out any partially created/partially removed users. 231 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 232 for (int i = 0; i < mUsers.size(); i++) { 233 UserInfo ui = mUsers.valueAt(i); 234 if ((ui.partial || ui.guestToRemove) && i != 0) { 235 partials.add(ui); 236 } 237 } 238 for (int i = 0; i < partials.size(); i++) { 239 UserInfo ui = partials.get(i); 240 Slog.w(LOG_TAG, "Removing partially created user #" + i 241 + " (name=" + ui.name + ")"); 242 removeUserStateLocked(ui.id); 243 } 244 sInstance = this; 245 } 246 } 247 } 248 249 void systemReady() { 250 userForeground(UserHandle.USER_OWNER); 251 mAppOpsService = IAppOpsService.Stub.asInterface( 252 ServiceManager.getService(Context.APP_OPS_SERVICE)); 253 for (int i = 0; i < mUserIds.length; ++i) { 254 try { 255 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 256 } catch (RemoteException e) { 257 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 258 } 259 } 260 } 261 262 @Override 263 public List<UserInfo> getUsers(boolean excludeDying) { 264 checkManageUsersPermission("query users"); 265 synchronized (mPackagesLock) { 266 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 267 for (int i = 0; i < mUsers.size(); i++) { 268 UserInfo ui = mUsers.valueAt(i); 269 if (ui.partial) { 270 continue; 271 } 272 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 273 users.add(ui); 274 } 275 } 276 return users; 277 } 278 } 279 280 @Override 281 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 282 if (userId != UserHandle.getCallingUserId()) { 283 checkManageUsersPermission("getting profiles related to user " + userId); 284 } 285 final long ident = Binder.clearCallingIdentity(); 286 try { 287 synchronized (mPackagesLock) { 288 return getProfilesLocked(userId, enabledOnly); 289 } 290 } finally { 291 Binder.restoreCallingIdentity(ident); 292 } 293 } 294 295 /** Assume permissions already checked and caller's identity cleared */ 296 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 297 UserInfo user = getUserInfoLocked(userId); 298 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 299 if (user == null) { 300 // Probably a dying user 301 return users; 302 } 303 for (int i = 0; i < mUsers.size(); i++) { 304 UserInfo profile = mUsers.valueAt(i); 305 if (!isProfileOf(user, profile)) { 306 continue; 307 } 308 if (enabledOnly && !profile.isEnabled()) { 309 continue; 310 } 311 if (mRemovingUserIds.get(profile.id)) { 312 continue; 313 } 314 users.add(profile); 315 } 316 return users; 317 } 318 319 @Override 320 public UserInfo getProfileParent(int userHandle) { 321 checkManageUsersPermission("get the profile parent"); 322 synchronized (mPackagesLock) { 323 UserInfo profile = getUserInfoLocked(userHandle); 324 if (profile == null) { 325 return null; 326 } 327 int parentUserId = profile.profileGroupId; 328 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 329 return null; 330 } else { 331 return getUserInfoLocked(parentUserId); 332 } 333 } 334 } 335 336 private boolean isProfileOf(UserInfo user, UserInfo profile) { 337 return user.id == profile.id || 338 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 339 && user.profileGroupId == profile.profileGroupId); 340 } 341 342 @Override 343 public void setUserEnabled(int userId) { 344 checkManageUsersPermission("enable user"); 345 synchronized (mPackagesLock) { 346 UserInfo info = getUserInfoLocked(userId); 347 if (info != null && !info.isEnabled()) { 348 info.flags ^= UserInfo.FLAG_DISABLED; 349 writeUserLocked(info); 350 } 351 } 352 } 353 354 @Override 355 public UserInfo getUserInfo(int userId) { 356 checkManageUsersPermission("query user"); 357 synchronized (mPackagesLock) { 358 return getUserInfoLocked(userId); 359 } 360 } 361 362 @Override 363 public boolean isRestricted() { 364 synchronized (mPackagesLock) { 365 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 366 } 367 } 368 369 /* 370 * Should be locked on mUsers before calling this. 371 */ 372 private UserInfo getUserInfoLocked(int userId) { 373 UserInfo ui = mUsers.get(userId); 374 // If it is partial and not in the process of being removed, return as unknown user. 375 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 376 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 377 return null; 378 } 379 return ui; 380 } 381 382 public boolean exists(int userId) { 383 synchronized (mPackagesLock) { 384 return ArrayUtils.contains(mUserIds, userId); 385 } 386 } 387 388 @Override 389 public void setUserName(int userId, String name) { 390 checkManageUsersPermission("rename users"); 391 boolean changed = false; 392 synchronized (mPackagesLock) { 393 UserInfo info = mUsers.get(userId); 394 if (info == null || info.partial) { 395 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 396 return; 397 } 398 if (name != null && !name.equals(info.name)) { 399 info.name = name; 400 writeUserLocked(info); 401 changed = true; 402 } 403 } 404 if (changed) { 405 sendUserInfoChangedBroadcast(userId); 406 } 407 } 408 409 @Override 410 public void setUserIcon(int userId, Bitmap bitmap) { 411 checkManageUsersPermission("update users"); 412 long ident = Binder.clearCallingIdentity(); 413 try { 414 synchronized (mPackagesLock) { 415 UserInfo info = mUsers.get(userId); 416 if (info == null || info.partial) { 417 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 418 return; 419 } 420 writeBitmapLocked(info, bitmap); 421 writeUserLocked(info); 422 } 423 sendUserInfoChangedBroadcast(userId); 424 } finally { 425 Binder.restoreCallingIdentity(ident); 426 } 427 } 428 429 private void sendUserInfoChangedBroadcast(int userId) { 430 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 431 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 432 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 433 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 434 } 435 436 @Override 437 public Bitmap getUserIcon(int userId) { 438 synchronized (mPackagesLock) { 439 UserInfo info = mUsers.get(userId); 440 if (info == null || info.partial) { 441 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 442 return null; 443 } 444 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 445 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 446 || callingGroupId != info.profileGroupId) { 447 checkManageUsersPermission("get the icon of a user who is not related"); 448 } 449 if (info.iconPath == null) { 450 return null; 451 } 452 return BitmapFactory.decodeFile(info.iconPath); 453 } 454 } 455 456 public void makeInitialized(int userId) { 457 checkManageUsersPermission("makeInitialized"); 458 synchronized (mPackagesLock) { 459 UserInfo info = mUsers.get(userId); 460 if (info == null || info.partial) { 461 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 462 } 463 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 464 info.flags |= UserInfo.FLAG_INITIALIZED; 465 writeUserLocked(info); 466 } 467 } 468 } 469 470 /** 471 * If default guest restrictions haven't been initialized yet, add the basic 472 * restrictions. 473 */ 474 private void initDefaultGuestRestrictions() { 475 if (mGuestRestrictions.isEmpty()) { 476 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 477 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 478 } 479 } 480 481 @Override 482 public Bundle getDefaultGuestRestrictions() { 483 checkManageUsersPermission("getDefaultGuestRestrictions"); 484 synchronized (mPackagesLock) { 485 return new Bundle(mGuestRestrictions); 486 } 487 } 488 489 @Override 490 public void setDefaultGuestRestrictions(Bundle restrictions) { 491 checkManageUsersPermission("setDefaultGuestRestrictions"); 492 synchronized (mPackagesLock) { 493 mGuestRestrictions.clear(); 494 mGuestRestrictions.putAll(restrictions); 495 writeUserListLocked(); 496 } 497 } 498 499 @Override 500 public boolean hasUserRestriction(String restrictionKey, int userId) { 501 synchronized (mPackagesLock) { 502 Bundle restrictions = mUserRestrictions.get(userId); 503 return restrictions != null ? restrictions.getBoolean(restrictionKey) : false; 504 } 505 } 506 507 @Override 508 public Bundle getUserRestrictions(int userId) { 509 // checkManageUsersPermission("getUserRestrictions"); 510 511 synchronized (mPackagesLock) { 512 Bundle restrictions = mUserRestrictions.get(userId); 513 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 514 } 515 } 516 517 @Override 518 public void setUserRestrictions(Bundle restrictions, int userId) { 519 checkManageUsersPermission("setUserRestrictions"); 520 if (restrictions == null) return; 521 522 synchronized (mPackagesLock) { 523 mUserRestrictions.get(userId).clear(); 524 mUserRestrictions.get(userId).putAll(restrictions); 525 long token = Binder.clearCallingIdentity(); 526 try { 527 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 528 } catch (RemoteException e) { 529 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 530 } finally { 531 Binder.restoreCallingIdentity(token); 532 } 533 writeUserLocked(mUsers.get(userId)); 534 } 535 } 536 537 /** 538 * Check if we've hit the limit of how many users can be created. 539 */ 540 private boolean isUserLimitReachedLocked() { 541 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 542 } 543 544 @Override 545 public boolean canAddMoreManagedProfiles() { 546 checkManageUsersPermission("check if more managed profiles can be added."); 547 if (ActivityManager.isLowRamDeviceStatic()) { 548 return false; 549 } 550 synchronized(mPackagesLock) { 551 // Limit number of managed profiles that can be created 552 if (numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 553 >= MAX_MANAGED_PROFILES) { 554 return false; 555 } 556 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 557 // We allow creating a managed profile in the special case where there is only one user. 558 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 559 } 560 } 561 562 private int getAliveUsersExcludingGuestsCountLocked() { 563 int aliveUserCount = 0; 564 final int totalUserCount = mUsers.size(); 565 // Skip over users being removed 566 for (int i = 0; i < totalUserCount; i++) { 567 UserInfo user = mUsers.valueAt(i); 568 if (!mRemovingUserIds.get(user.id) 569 && !user.isGuest() && !user.partial) { 570 aliveUserCount++; 571 } 572 } 573 return aliveUserCount; 574 } 575 576 /** 577 * Enforces that only the system UID or root's UID or apps that have the 578 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 579 * permission can make certain calls to the UserManager. 580 * 581 * @param message used as message if SecurityException is thrown 582 * @throws SecurityException if the caller is not system or root 583 */ 584 private static final void checkManageUsersPermission(String message) { 585 final int uid = Binder.getCallingUid(); 586 if (uid != Process.SYSTEM_UID && uid != 0 587 && ActivityManager.checkComponentPermission( 588 android.Manifest.permission.MANAGE_USERS, 589 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 590 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 591 } 592 } 593 594 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 595 try { 596 File dir = new File(mUsersDir, Integer.toString(info.id)); 597 File file = new File(dir, USER_PHOTO_FILENAME); 598 if (!dir.exists()) { 599 dir.mkdir(); 600 FileUtils.setPermissions( 601 dir.getPath(), 602 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 603 -1, -1); 604 } 605 FileOutputStream os; 606 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 607 info.iconPath = file.getAbsolutePath(); 608 } 609 try { 610 os.close(); 611 } catch (IOException ioe) { 612 // What the ... ! 613 } 614 } catch (FileNotFoundException e) { 615 Slog.w(LOG_TAG, "Error setting photo for user ", e); 616 } 617 } 618 619 /** 620 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 621 * cache it elsewhere. 622 * @return the array of user ids. 623 */ 624 public int[] getUserIds() { 625 synchronized (mPackagesLock) { 626 return mUserIds; 627 } 628 } 629 630 int[] getUserIdsLPr() { 631 return mUserIds; 632 } 633 634 private void readUserListLocked() { 635 if (!mUserListFile.exists()) { 636 fallbackToSingleUserLocked(); 637 return; 638 } 639 FileInputStream fis = null; 640 AtomicFile userListFile = new AtomicFile(mUserListFile); 641 try { 642 fis = userListFile.openRead(); 643 XmlPullParser parser = Xml.newPullParser(); 644 parser.setInput(fis, StandardCharsets.UTF_8.name()); 645 int type; 646 while ((type = parser.next()) != XmlPullParser.START_TAG 647 && type != XmlPullParser.END_DOCUMENT) { 648 ; 649 } 650 651 if (type != XmlPullParser.START_TAG) { 652 Slog.e(LOG_TAG, "Unable to read user list"); 653 fallbackToSingleUserLocked(); 654 return; 655 } 656 657 mNextSerialNumber = -1; 658 if (parser.getName().equals(TAG_USERS)) { 659 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 660 if (lastSerialNumber != null) { 661 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 662 } 663 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 664 if (versionNumber != null) { 665 mUserVersion = Integer.parseInt(versionNumber); 666 } 667 } 668 669 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 670 if (type == XmlPullParser.START_TAG) { 671 final String name = parser.getName(); 672 if (name.equals(TAG_USER)) { 673 String id = parser.getAttributeValue(null, ATTR_ID); 674 UserInfo user = readUserLocked(Integer.parseInt(id)); 675 676 if (user != null) { 677 mUsers.put(user.id, user); 678 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 679 mNextSerialNumber = user.id + 1; 680 } 681 } 682 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 683 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 684 && type != XmlPullParser.END_TAG) { 685 if (type == XmlPullParser.START_TAG) { 686 if (parser.getName().equals(TAG_RESTRICTIONS)) { 687 readRestrictionsLocked(parser, mGuestRestrictions); 688 } 689 break; 690 } 691 } 692 } 693 } 694 } 695 updateUserIdsLocked(); 696 upgradeIfNecessaryLocked(); 697 } catch (IOException ioe) { 698 fallbackToSingleUserLocked(); 699 } catch (XmlPullParserException pe) { 700 fallbackToSingleUserLocked(); 701 } finally { 702 if (fis != null) { 703 try { 704 fis.close(); 705 } catch (IOException e) { 706 } 707 } 708 } 709 } 710 711 /** 712 * Upgrade steps between versions, either for fixing bugs or changing the data format. 713 */ 714 private void upgradeIfNecessaryLocked() { 715 int userVersion = mUserVersion; 716 if (userVersion < 1) { 717 // Assign a proper name for the owner, if not initialized correctly before 718 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 719 if ("Primary".equals(user.name)) { 720 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 721 writeUserLocked(user); 722 } 723 userVersion = 1; 724 } 725 726 if (userVersion < 2) { 727 // Owner should be marked as initialized 728 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 729 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 730 user.flags |= UserInfo.FLAG_INITIALIZED; 731 writeUserLocked(user); 732 } 733 userVersion = 2; 734 } 735 736 737 if (userVersion < 4) { 738 userVersion = 4; 739 } 740 741 if (userVersion < 5) { 742 initDefaultGuestRestrictions(); 743 userVersion = 5; 744 } 745 746 if (userVersion < USER_VERSION) { 747 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 748 + USER_VERSION); 749 } else { 750 mUserVersion = userVersion; 751 writeUserListLocked(); 752 } 753 } 754 755 private void fallbackToSingleUserLocked() { 756 // Create the primary user 757 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 758 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 759 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 760 mUsers.put(0, primary); 761 mNextSerialNumber = MIN_USER_ID; 762 mUserVersion = USER_VERSION; 763 764 Bundle restrictions = new Bundle(); 765 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 766 767 updateUserIdsLocked(); 768 initDefaultGuestRestrictions(); 769 770 writeUserListLocked(); 771 writeUserLocked(primary); 772 } 773 774 /* 775 * Writes the user file in this format: 776 * 777 * <user flags="20039023" id="0"> 778 * <name>Primary</name> 779 * </user> 780 */ 781 private void writeUserLocked(UserInfo userInfo) { 782 FileOutputStream fos = null; 783 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 784 try { 785 fos = userFile.startWrite(); 786 final BufferedOutputStream bos = new BufferedOutputStream(fos); 787 788 // XmlSerializer serializer = XmlUtils.serializerInstance(); 789 final XmlSerializer serializer = new FastXmlSerializer(); 790 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 791 serializer.startDocument(null, true); 792 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 793 794 serializer.startTag(null, TAG_USER); 795 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 796 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 797 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 798 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 799 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 800 Long.toString(userInfo.lastLoggedInTime)); 801 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 802 if (pinState != null) { 803 if (pinState.salt != 0) { 804 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 805 } 806 if (pinState.pinHash != null) { 807 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 808 } 809 if (pinState.failedAttempts != 0) { 810 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 811 Integer.toString(pinState.failedAttempts)); 812 serializer.attribute(null, ATTR_LAST_RETRY_MS, 813 Long.toString(pinState.lastAttemptTime)); 814 } 815 } 816 if (userInfo.iconPath != null) { 817 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 818 } 819 if (userInfo.partial) { 820 serializer.attribute(null, ATTR_PARTIAL, "true"); 821 } 822 if (userInfo.guestToRemove) { 823 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 824 } 825 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 826 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 827 Integer.toString(userInfo.profileGroupId)); 828 } 829 830 serializer.startTag(null, TAG_NAME); 831 serializer.text(userInfo.name); 832 serializer.endTag(null, TAG_NAME); 833 Bundle restrictions = mUserRestrictions.get(userInfo.id); 834 if (restrictions != null) { 835 writeRestrictionsLocked(serializer, restrictions); 836 } 837 serializer.endTag(null, TAG_USER); 838 839 serializer.endDocument(); 840 userFile.finishWrite(fos); 841 } catch (Exception ioe) { 842 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 843 userFile.failWrite(fos); 844 } 845 } 846 847 /* 848 * Writes the user list file in this format: 849 * 850 * <users nextSerialNumber="3"> 851 * <user id="0"></user> 852 * <user id="2"></user> 853 * </users> 854 */ 855 private void writeUserListLocked() { 856 FileOutputStream fos = null; 857 AtomicFile userListFile = new AtomicFile(mUserListFile); 858 try { 859 fos = userListFile.startWrite(); 860 final BufferedOutputStream bos = new BufferedOutputStream(fos); 861 862 // XmlSerializer serializer = XmlUtils.serializerInstance(); 863 final XmlSerializer serializer = new FastXmlSerializer(); 864 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 865 serializer.startDocument(null, true); 866 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 867 868 serializer.startTag(null, TAG_USERS); 869 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 870 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 871 872 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 873 writeRestrictionsLocked(serializer, mGuestRestrictions); 874 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 875 for (int i = 0; i < mUsers.size(); i++) { 876 UserInfo user = mUsers.valueAt(i); 877 serializer.startTag(null, TAG_USER); 878 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 879 serializer.endTag(null, TAG_USER); 880 } 881 882 serializer.endTag(null, TAG_USERS); 883 884 serializer.endDocument(); 885 userListFile.finishWrite(fos); 886 } catch (Exception e) { 887 userListFile.failWrite(fos); 888 Slog.e(LOG_TAG, "Error writing user list"); 889 } 890 } 891 892 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 893 throws IOException { 894 serializer.startTag(null, TAG_RESTRICTIONS); 895 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 896 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 897 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 898 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 899 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 900 writeBoolean(serializer, restrictions, 901 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 902 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 903 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 904 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 905 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 906 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 907 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 908 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 909 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 910 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 911 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 912 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 913 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 914 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 915 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 916 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 917 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 918 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 919 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 920 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 921 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 922 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 923 serializer.endTag(null, TAG_RESTRICTIONS); 924 } 925 926 private UserInfo readUserLocked(int id) { 927 int flags = 0; 928 int serialNumber = id; 929 String name = null; 930 String iconPath = null; 931 long creationTime = 0L; 932 long lastLoggedInTime = 0L; 933 long salt = 0L; 934 String pinHash = null; 935 int failedAttempts = 0; 936 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 937 long lastAttemptTime = 0L; 938 boolean partial = false; 939 boolean guestToRemove = false; 940 Bundle restrictions = new Bundle(); 941 942 FileInputStream fis = null; 943 try { 944 AtomicFile userFile = 945 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 946 fis = userFile.openRead(); 947 XmlPullParser parser = Xml.newPullParser(); 948 parser.setInput(fis, StandardCharsets.UTF_8.name()); 949 int type; 950 while ((type = parser.next()) != XmlPullParser.START_TAG 951 && type != XmlPullParser.END_DOCUMENT) { 952 ; 953 } 954 955 if (type != XmlPullParser.START_TAG) { 956 Slog.e(LOG_TAG, "Unable to read user " + id); 957 return null; 958 } 959 960 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 961 int storedId = readIntAttribute(parser, ATTR_ID, -1); 962 if (storedId != id) { 963 Slog.e(LOG_TAG, "User id does not match the file name"); 964 return null; 965 } 966 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 967 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 968 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 969 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 970 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 971 salt = readLongAttribute(parser, ATTR_SALT, 0L); 972 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 973 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 974 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 975 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 976 UserInfo.NO_PROFILE_GROUP_ID); 977 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 978 // This attribute was added and renamed during development of L. 979 // TODO Remove upgrade path by 1st May 2014 980 profileGroupId = readIntAttribute(parser, "relatedGroupId", 981 UserInfo.NO_PROFILE_GROUP_ID); 982 } 983 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 984 if ("true".equals(valueString)) { 985 partial = true; 986 } 987 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 988 if ("true".equals(valueString)) { 989 guestToRemove = true; 990 } 991 992 int outerDepth = parser.getDepth(); 993 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 994 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 995 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 996 continue; 997 } 998 String tag = parser.getName(); 999 if (TAG_NAME.equals(tag)) { 1000 type = parser.next(); 1001 if (type == XmlPullParser.TEXT) { 1002 name = parser.getText(); 1003 } 1004 } else if (TAG_RESTRICTIONS.equals(tag)) { 1005 readRestrictionsLocked(parser, restrictions); 1006 } 1007 } 1008 } 1009 1010 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1011 userInfo.serialNumber = serialNumber; 1012 userInfo.creationTime = creationTime; 1013 userInfo.lastLoggedInTime = lastLoggedInTime; 1014 userInfo.partial = partial; 1015 userInfo.guestToRemove = guestToRemove; 1016 userInfo.profileGroupId = profileGroupId; 1017 mUserRestrictions.append(id, restrictions); 1018 if (salt != 0L) { 1019 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 1020 if (pinState == null) { 1021 pinState = new RestrictionsPinState(); 1022 mRestrictionsPinStates.put(id, pinState); 1023 } 1024 pinState.salt = salt; 1025 pinState.pinHash = pinHash; 1026 pinState.failedAttempts = failedAttempts; 1027 pinState.lastAttemptTime = lastAttemptTime; 1028 } 1029 return userInfo; 1030 1031 } catch (IOException ioe) { 1032 } catch (XmlPullParserException pe) { 1033 } finally { 1034 if (fis != null) { 1035 try { 1036 fis.close(); 1037 } catch (IOException e) { 1038 } 1039 } 1040 } 1041 return null; 1042 } 1043 1044 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1045 throws IOException { 1046 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1047 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1048 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1049 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1050 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1051 readBoolean(parser, restrictions, 1052 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1053 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1054 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1055 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1056 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1057 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1058 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1059 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1060 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1061 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1062 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1063 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1064 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1065 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1066 readBoolean(parser, restrictions, 1067 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1068 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1069 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1070 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1071 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1072 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1073 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1074 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1075 } 1076 1077 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1078 String restrictionKey) { 1079 String value = parser.getAttributeValue(null, restrictionKey); 1080 if (value != null) { 1081 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1082 } 1083 } 1084 1085 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1086 throws IOException { 1087 if (restrictions.containsKey(restrictionKey)) { 1088 xml.attribute(null, restrictionKey, 1089 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1090 } 1091 } 1092 1093 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1094 String valueString = parser.getAttributeValue(null, attr); 1095 if (valueString == null) return defaultValue; 1096 try { 1097 return Integer.parseInt(valueString); 1098 } catch (NumberFormatException nfe) { 1099 return defaultValue; 1100 } 1101 } 1102 1103 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1104 String valueString = parser.getAttributeValue(null, attr); 1105 if (valueString == null) return defaultValue; 1106 try { 1107 return Long.parseLong(valueString); 1108 } catch (NumberFormatException nfe) { 1109 return defaultValue; 1110 } 1111 } 1112 1113 private boolean isPackageInstalled(String pkg, int userId) { 1114 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1115 PackageManager.GET_UNINSTALLED_PACKAGES, 1116 userId); 1117 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1118 return false; 1119 } 1120 return true; 1121 } 1122 1123 /** 1124 * Removes all the restrictions files (res_<packagename>) for a given user. 1125 * Does not do any permissions checking. 1126 */ 1127 private void cleanAppRestrictions(int userId) { 1128 synchronized (mPackagesLock) { 1129 File dir = Environment.getUserSystemDirectory(userId); 1130 String[] files = dir.list(); 1131 if (files == null) return; 1132 for (String fileName : files) { 1133 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1134 File resFile = new File(dir, fileName); 1135 if (resFile.exists()) { 1136 resFile.delete(); 1137 } 1138 } 1139 } 1140 } 1141 } 1142 1143 /** 1144 * Removes the app restrictions file for a specific package and user id, if it exists. 1145 */ 1146 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1147 synchronized (mPackagesLock) { 1148 File dir = Environment.getUserSystemDirectory(userId); 1149 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1150 if (resFile.exists()) { 1151 resFile.delete(); 1152 } 1153 } 1154 } 1155 1156 @Override 1157 public UserInfo createProfileForUser(String name, int flags, int userId) { 1158 checkManageUsersPermission("Only the system can create users"); 1159 if (userId != UserHandle.USER_OWNER) { 1160 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1161 return null; 1162 } 1163 return createUserInternal(name, flags, userId); 1164 } 1165 1166 @Override 1167 public UserInfo createUser(String name, int flags) { 1168 checkManageUsersPermission("Only the system can create users"); 1169 return createUserInternal(name, flags, UserHandle.USER_NULL); 1170 } 1171 1172 private UserInfo createUserInternal(String name, int flags, int parentId) { 1173 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1174 UserManager.DISALLOW_ADD_USER, false)) { 1175 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1176 return null; 1177 } 1178 if (ActivityManager.isLowRamDeviceStatic()) { 1179 return null; 1180 } 1181 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1182 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1183 final long ident = Binder.clearCallingIdentity(); 1184 UserInfo userInfo = null; 1185 try { 1186 synchronized (mInstallLock) { 1187 synchronized (mPackagesLock) { 1188 UserInfo parent = null; 1189 if (parentId != UserHandle.USER_NULL) { 1190 parent = getUserInfoLocked(parentId); 1191 if (parent == null) return null; 1192 } 1193 if (isManagedProfile && !canAddMoreManagedProfiles()) { 1194 return null; 1195 } 1196 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1197 // If we're not adding a guest user or a managed profile and the limit has 1198 // been reached, cannot add a user. 1199 return null; 1200 } 1201 // If we're adding a guest and there already exists one, bail. 1202 if (isGuest && findCurrentGuestUserLocked() != null) { 1203 return null; 1204 } 1205 int userId = getNextAvailableIdLocked(); 1206 userInfo = new UserInfo(userId, name, null, flags); 1207 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1208 userInfo.serialNumber = mNextSerialNumber++; 1209 long now = System.currentTimeMillis(); 1210 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1211 userInfo.partial = true; 1212 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1213 mUsers.put(userId, userInfo); 1214 writeUserListLocked(); 1215 if (parent != null) { 1216 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1217 parent.profileGroupId = parent.id; 1218 writeUserLocked(parent); 1219 } 1220 userInfo.profileGroupId = parent.profileGroupId; 1221 } 1222 writeUserLocked(userInfo); 1223 mPm.createNewUserLILPw(userId, userPath); 1224 userInfo.partial = false; 1225 writeUserLocked(userInfo); 1226 updateUserIdsLocked(); 1227 Bundle restrictions = new Bundle(); 1228 mUserRestrictions.append(userId, restrictions); 1229 } 1230 } 1231 if (userInfo != null) { 1232 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1233 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1234 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1235 android.Manifest.permission.MANAGE_USERS); 1236 } 1237 } finally { 1238 Binder.restoreCallingIdentity(ident); 1239 } 1240 return userInfo; 1241 } 1242 1243 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1244 int count = 0; 1245 for (int i = mUsers.size() - 1; i >= 0; i--) { 1246 UserInfo user = mUsers.valueAt(i); 1247 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1248 if ((user.flags & flags) != 0) { 1249 count++; 1250 } 1251 } 1252 } 1253 return count; 1254 } 1255 1256 /** 1257 * Find the current guest user. If the Guest user is partial, 1258 * then do not include it in the results as it is about to die. 1259 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1260 * the special handling of Guests being removed. 1261 */ 1262 private UserInfo findCurrentGuestUserLocked() { 1263 final int size = mUsers.size(); 1264 for (int i = 0; i < size; i++) { 1265 final UserInfo user = mUsers.valueAt(i); 1266 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1267 return user; 1268 } 1269 } 1270 return null; 1271 } 1272 1273 /** 1274 * Mark this guest user for deletion to allow us to create another guest 1275 * and switch to that user before actually removing this guest. 1276 * @param userHandle the userid of the current guest 1277 * @return whether the user could be marked for deletion 1278 */ 1279 public boolean markGuestForDeletion(int userHandle) { 1280 checkManageUsersPermission("Only the system can remove users"); 1281 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1282 UserManager.DISALLOW_REMOVE_USER, false)) { 1283 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1284 return false; 1285 } 1286 1287 long ident = Binder.clearCallingIdentity(); 1288 try { 1289 final UserInfo user; 1290 synchronized (mPackagesLock) { 1291 user = mUsers.get(userHandle); 1292 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1293 return false; 1294 } 1295 if (!user.isGuest()) { 1296 return false; 1297 } 1298 // We set this to a guest user that is to be removed. This is a temporary state 1299 // where we are allowed to add new Guest users, even if this one is still not 1300 // removed. This user will still show up in getUserInfo() calls. 1301 // If we don't get around to removing this Guest user, it will be purged on next 1302 // startup. 1303 user.guestToRemove = true; 1304 // Mark it as disabled, so that it isn't returned any more when 1305 // profiles are queried. 1306 user.flags |= UserInfo.FLAG_DISABLED; 1307 writeUserLocked(user); 1308 } 1309 } finally { 1310 Binder.restoreCallingIdentity(ident); 1311 } 1312 return true; 1313 } 1314 1315 /** 1316 * Removes a user and all data directories created for that user. This method should be called 1317 * after the user's processes have been terminated. 1318 * @param userHandle the user's id 1319 */ 1320 public boolean removeUser(int userHandle) { 1321 checkManageUsersPermission("Only the system can remove users"); 1322 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1323 UserManager.DISALLOW_REMOVE_USER, false)) { 1324 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1325 return false; 1326 } 1327 1328 long ident = Binder.clearCallingIdentity(); 1329 try { 1330 final UserInfo user; 1331 synchronized (mPackagesLock) { 1332 user = mUsers.get(userHandle); 1333 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1334 return false; 1335 } 1336 1337 // We remember deleted user IDs to prevent them from being 1338 // reused during the current boot; they can still be reused 1339 // after a reboot. 1340 mRemovingUserIds.put(userHandle, true); 1341 1342 try { 1343 mAppOpsService.removeUser(userHandle); 1344 } catch (RemoteException e) { 1345 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1346 } 1347 // Set this to a partially created user, so that the user will be purged 1348 // on next startup, in case the runtime stops now before stopping and 1349 // removing the user completely. 1350 user.partial = true; 1351 // Mark it as disabled, so that it isn't returned any more when 1352 // profiles are queried. 1353 user.flags |= UserInfo.FLAG_DISABLED; 1354 writeUserLocked(user); 1355 } 1356 1357 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1358 && user.isManagedProfile()) { 1359 // Send broadcast to notify system that the user removed was a 1360 // managed user. 1361 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1362 } 1363 1364 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1365 int res; 1366 try { 1367 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1368 new IStopUserCallback.Stub() { 1369 @Override 1370 public void userStopped(int userId) { 1371 finishRemoveUser(userId); 1372 } 1373 @Override 1374 public void userStopAborted(int userId) { 1375 } 1376 }); 1377 } catch (RemoteException e) { 1378 return false; 1379 } 1380 return res == ActivityManager.USER_OP_SUCCESS; 1381 } finally { 1382 Binder.restoreCallingIdentity(ident); 1383 } 1384 } 1385 1386 void finishRemoveUser(final int userHandle) { 1387 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1388 // Let other services shutdown any activity and clean up their state before completely 1389 // wiping the user's system directory and removing from the user list 1390 long ident = Binder.clearCallingIdentity(); 1391 try { 1392 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1393 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1394 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1395 android.Manifest.permission.MANAGE_USERS, 1396 1397 new BroadcastReceiver() { 1398 @Override 1399 public void onReceive(Context context, Intent intent) { 1400 if (DBG) { 1401 Slog.i(LOG_TAG, 1402 "USER_REMOVED broadcast sent, cleaning up user data " 1403 + userHandle); 1404 } 1405 new Thread() { 1406 public void run() { 1407 synchronized (mInstallLock) { 1408 synchronized (mPackagesLock) { 1409 removeUserStateLocked(userHandle); 1410 } 1411 } 1412 } 1413 }.start(); 1414 } 1415 }, 1416 1417 null, Activity.RESULT_OK, null, null); 1418 } finally { 1419 Binder.restoreCallingIdentity(ident); 1420 } 1421 } 1422 1423 private void removeUserStateLocked(final int userHandle) { 1424 // Cleanup package manager settings 1425 mPm.cleanUpUserLILPw(this, userHandle); 1426 1427 // Remove this user from the list 1428 mUsers.remove(userHandle); 1429 1430 mRestrictionsPinStates.remove(userHandle); 1431 // Remove user file 1432 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1433 userFile.delete(); 1434 // Update the user list 1435 writeUserListLocked(); 1436 updateUserIdsLocked(); 1437 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1438 } 1439 1440 private void removeDirectoryRecursive(File parent) { 1441 if (parent.isDirectory()) { 1442 String[] files = parent.list(); 1443 for (String filename : files) { 1444 File child = new File(parent, filename); 1445 removeDirectoryRecursive(child); 1446 } 1447 } 1448 parent.delete(); 1449 } 1450 1451 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1452 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1453 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1454 Intent.FLAG_RECEIVER_FOREGROUND); 1455 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1456 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1457 } 1458 1459 @Override 1460 public Bundle getApplicationRestrictions(String packageName) { 1461 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1462 } 1463 1464 @Override 1465 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1466 if (UserHandle.getCallingUserId() != userId 1467 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1468 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1469 } 1470 synchronized (mPackagesLock) { 1471 // Read the restrictions from XML 1472 return readApplicationRestrictionsLocked(packageName, userId); 1473 } 1474 } 1475 1476 @Override 1477 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1478 int userId) { 1479 if (UserHandle.getCallingUserId() != userId 1480 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1481 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1482 } 1483 synchronized (mPackagesLock) { 1484 if (restrictions == null || restrictions.isEmpty()) { 1485 cleanAppRestrictionsForPackage(packageName, userId); 1486 } else { 1487 // Write the restrictions to XML 1488 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1489 } 1490 } 1491 1492 if (isPackageInstalled(packageName, userId)) { 1493 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1494 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1495 changeIntent.setPackage(packageName); 1496 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1497 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1498 } 1499 } 1500 1501 @Override 1502 public boolean setRestrictionsChallenge(String newPin) { 1503 checkManageUsersPermission("Only system can modify the restrictions pin"); 1504 int userId = UserHandle.getCallingUserId(); 1505 synchronized (mPackagesLock) { 1506 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1507 if (pinState == null) { 1508 pinState = new RestrictionsPinState(); 1509 } 1510 if (newPin == null) { 1511 pinState.salt = 0; 1512 pinState.pinHash = null; 1513 } else { 1514 try { 1515 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1516 } catch (NoSuchAlgorithmException e) { 1517 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1518 } 1519 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1520 pinState.failedAttempts = 0; 1521 } 1522 mRestrictionsPinStates.put(userId, pinState); 1523 writeUserLocked(mUsers.get(userId)); 1524 } 1525 return true; 1526 } 1527 1528 @Override 1529 public int checkRestrictionsChallenge(String pin) { 1530 checkManageUsersPermission("Only system can verify the restrictions pin"); 1531 int userId = UserHandle.getCallingUserId(); 1532 synchronized (mPackagesLock) { 1533 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1534 // If there's no pin set, return error code 1535 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1536 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1537 } else if (pin == null) { 1538 // If just checking if user can be prompted, return remaining time 1539 int waitTime = getRemainingTimeForPinAttempt(pinState); 1540 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1541 return waitTime; 1542 } else { 1543 int waitTime = getRemainingTimeForPinAttempt(pinState); 1544 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1545 if (waitTime > 0) { 1546 return waitTime; 1547 } 1548 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1549 pinState.failedAttempts = 0; 1550 writeUserLocked(mUsers.get(userId)); 1551 return UserManager.PIN_VERIFICATION_SUCCESS; 1552 } else { 1553 pinState.failedAttempts++; 1554 pinState.lastAttemptTime = System.currentTimeMillis(); 1555 writeUserLocked(mUsers.get(userId)); 1556 return waitTime; 1557 } 1558 } 1559 } 1560 } 1561 1562 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1563 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1564 BACKOFF_TIMES.length - 1); 1565 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1566 BACKOFF_TIMES[backoffIndex] : 0; 1567 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1568 0); 1569 } 1570 1571 @Override 1572 public boolean hasRestrictionsChallenge() { 1573 int userId = UserHandle.getCallingUserId(); 1574 synchronized (mPackagesLock) { 1575 return hasRestrictionsPinLocked(userId); 1576 } 1577 } 1578 1579 private boolean hasRestrictionsPinLocked(int userId) { 1580 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1581 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1582 return false; 1583 } 1584 return true; 1585 } 1586 1587 @Override 1588 public void removeRestrictions() { 1589 checkManageUsersPermission("Only system can remove restrictions"); 1590 final int userHandle = UserHandle.getCallingUserId(); 1591 removeRestrictionsForUser(userHandle, true); 1592 } 1593 1594 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1595 synchronized (mPackagesLock) { 1596 // Remove all user restrictions 1597 setUserRestrictions(new Bundle(), userHandle); 1598 // Remove restrictions pin 1599 setRestrictionsChallenge(null); 1600 // Remove any app restrictions 1601 cleanAppRestrictions(userHandle); 1602 } 1603 if (unhideApps) { 1604 unhideAllInstalledAppsForUser(userHandle); 1605 } 1606 } 1607 1608 private void unhideAllInstalledAppsForUser(final int userHandle) { 1609 mHandler.post(new Runnable() { 1610 @Override 1611 public void run() { 1612 List<ApplicationInfo> apps = 1613 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1614 userHandle).getList(); 1615 final long ident = Binder.clearCallingIdentity(); 1616 try { 1617 for (ApplicationInfo appInfo : apps) { 1618 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1619 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1620 != 0) { 1621 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1622 userHandle); 1623 } 1624 } 1625 } finally { 1626 Binder.restoreCallingIdentity(ident); 1627 } 1628 } 1629 }); 1630 } 1631 1632 /* 1633 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1634 * Not the most secure, but it is at least a second level of protection. First level is that 1635 * the file is in a location only readable by the system process. 1636 * @param password the password. 1637 * @param salt the randomly generated salt 1638 * @return the hash of the pattern in a String. 1639 */ 1640 private String passwordToHash(String password, long salt) { 1641 if (password == null) { 1642 return null; 1643 } 1644 String algo = null; 1645 String hashed = salt + password; 1646 try { 1647 byte[] saltedPassword = (password + salt).getBytes(); 1648 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1649 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1650 hashed = toHex(sha1) + toHex(md5); 1651 } catch (NoSuchAlgorithmException e) { 1652 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1653 } 1654 return hashed; 1655 } 1656 1657 private static String toHex(byte[] ary) { 1658 final String hex = "0123456789ABCDEF"; 1659 String ret = ""; 1660 for (int i = 0; i < ary.length; i++) { 1661 ret += hex.charAt((ary[i] >> 4) & 0xf); 1662 ret += hex.charAt(ary[i] & 0xf); 1663 } 1664 return ret; 1665 } 1666 1667 private int getUidForPackage(String packageName) { 1668 long ident = Binder.clearCallingIdentity(); 1669 try { 1670 return mContext.getPackageManager().getApplicationInfo(packageName, 1671 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1672 } catch (NameNotFoundException nnfe) { 1673 return -1; 1674 } finally { 1675 Binder.restoreCallingIdentity(ident); 1676 } 1677 } 1678 1679 private Bundle readApplicationRestrictionsLocked(String packageName, 1680 int userId) { 1681 final Bundle restrictions = new Bundle(); 1682 final ArrayList<String> values = new ArrayList<String>(); 1683 1684 FileInputStream fis = null; 1685 try { 1686 AtomicFile restrictionsFile = 1687 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1688 packageToRestrictionsFileName(packageName))); 1689 fis = restrictionsFile.openRead(); 1690 XmlPullParser parser = Xml.newPullParser(); 1691 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1692 int type; 1693 while ((type = parser.next()) != XmlPullParser.START_TAG 1694 && type != XmlPullParser.END_DOCUMENT) { 1695 ; 1696 } 1697 1698 if (type != XmlPullParser.START_TAG) { 1699 Slog.e(LOG_TAG, "Unable to read restrictions file " 1700 + restrictionsFile.getBaseFile()); 1701 return restrictions; 1702 } 1703 1704 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1705 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1706 String key = parser.getAttributeValue(null, ATTR_KEY); 1707 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1708 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1709 if (multiple != null) { 1710 values.clear(); 1711 int count = Integer.parseInt(multiple); 1712 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1713 if (type == XmlPullParser.START_TAG 1714 && parser.getName().equals(TAG_VALUE)) { 1715 values.add(parser.nextText().trim()); 1716 count--; 1717 } 1718 } 1719 String [] valueStrings = new String[values.size()]; 1720 values.toArray(valueStrings); 1721 restrictions.putStringArray(key, valueStrings); 1722 } else { 1723 String value = parser.nextText().trim(); 1724 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1725 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1726 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1727 restrictions.putInt(key, Integer.parseInt(value)); 1728 } else { 1729 restrictions.putString(key, value); 1730 } 1731 } 1732 } 1733 } 1734 } catch (IOException ioe) { 1735 } catch (XmlPullParserException pe) { 1736 } finally { 1737 if (fis != null) { 1738 try { 1739 fis.close(); 1740 } catch (IOException e) { 1741 } 1742 } 1743 } 1744 return restrictions; 1745 } 1746 1747 private void writeApplicationRestrictionsLocked(String packageName, 1748 Bundle restrictions, int userId) { 1749 FileOutputStream fos = null; 1750 AtomicFile restrictionsFile = new AtomicFile( 1751 new File(Environment.getUserSystemDirectory(userId), 1752 packageToRestrictionsFileName(packageName))); 1753 try { 1754 fos = restrictionsFile.startWrite(); 1755 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1756 1757 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1758 final XmlSerializer serializer = new FastXmlSerializer(); 1759 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1760 serializer.startDocument(null, true); 1761 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1762 1763 serializer.startTag(null, TAG_RESTRICTIONS); 1764 1765 for (String key : restrictions.keySet()) { 1766 Object value = restrictions.get(key); 1767 serializer.startTag(null, TAG_ENTRY); 1768 serializer.attribute(null, ATTR_KEY, key); 1769 1770 if (value instanceof Boolean) { 1771 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1772 serializer.text(value.toString()); 1773 } else if (value instanceof Integer) { 1774 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1775 serializer.text(value.toString()); 1776 } else if (value == null || value instanceof String) { 1777 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1778 serializer.text(value != null ? (String) value : ""); 1779 } else { 1780 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1781 String[] values = (String[]) value; 1782 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1783 for (String choice : values) { 1784 serializer.startTag(null, TAG_VALUE); 1785 serializer.text(choice != null ? choice : ""); 1786 serializer.endTag(null, TAG_VALUE); 1787 } 1788 } 1789 serializer.endTag(null, TAG_ENTRY); 1790 } 1791 1792 serializer.endTag(null, TAG_RESTRICTIONS); 1793 1794 serializer.endDocument(); 1795 restrictionsFile.finishWrite(fos); 1796 } catch (Exception e) { 1797 restrictionsFile.failWrite(fos); 1798 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1799 } 1800 } 1801 1802 @Override 1803 public int getUserSerialNumber(int userHandle) { 1804 synchronized (mPackagesLock) { 1805 if (!exists(userHandle)) return -1; 1806 return getUserInfoLocked(userHandle).serialNumber; 1807 } 1808 } 1809 1810 @Override 1811 public int getUserHandle(int userSerialNumber) { 1812 synchronized (mPackagesLock) { 1813 for (int userId : mUserIds) { 1814 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1815 } 1816 // Not found 1817 return -1; 1818 } 1819 } 1820 1821 /** 1822 * Caches the list of user ids in an array, adjusting the array size when necessary. 1823 */ 1824 private void updateUserIdsLocked() { 1825 int num = 0; 1826 for (int i = 0; i < mUsers.size(); i++) { 1827 if (!mUsers.valueAt(i).partial) { 1828 num++; 1829 } 1830 } 1831 final int[] newUsers = new int[num]; 1832 int n = 0; 1833 for (int i = 0; i < mUsers.size(); i++) { 1834 if (!mUsers.valueAt(i).partial) { 1835 newUsers[n++] = mUsers.keyAt(i); 1836 } 1837 } 1838 mUserIds = newUsers; 1839 } 1840 1841 /** 1842 * Make a note of the last started time of a user and do some cleanup. 1843 * @param userId the user that was just foregrounded 1844 */ 1845 public void userForeground(int userId) { 1846 synchronized (mPackagesLock) { 1847 UserInfo user = mUsers.get(userId); 1848 long now = System.currentTimeMillis(); 1849 if (user == null || user.partial) { 1850 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1851 return; 1852 } 1853 if (now > EPOCH_PLUS_30_YEARS) { 1854 user.lastLoggedInTime = now; 1855 writeUserLocked(user); 1856 } 1857 } 1858 } 1859 1860 /** 1861 * Returns the next available user id, filling in any holes in the ids. 1862 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1863 * for data and battery stats collection, or unexpected cross-talk. 1864 * @return 1865 */ 1866 private int getNextAvailableIdLocked() { 1867 synchronized (mPackagesLock) { 1868 int i = MIN_USER_ID; 1869 while (i < Integer.MAX_VALUE) { 1870 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1871 break; 1872 } 1873 i++; 1874 } 1875 return i; 1876 } 1877 } 1878 1879 private String packageToRestrictionsFileName(String packageName) { 1880 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1881 } 1882 1883 private String restrictionsFileNameToPackage(String fileName) { 1884 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1885 (int) (fileName.length() - XML_SUFFIX.length())); 1886 } 1887 1888 @Override 1889 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1890 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1891 != PackageManager.PERMISSION_GRANTED) { 1892 pw.println("Permission Denial: can't dump UserManager from from pid=" 1893 + Binder.getCallingPid() 1894 + ", uid=" + Binder.getCallingUid() 1895 + " without permission " 1896 + android.Manifest.permission.DUMP); 1897 return; 1898 } 1899 1900 long now = System.currentTimeMillis(); 1901 StringBuilder sb = new StringBuilder(); 1902 synchronized (mPackagesLock) { 1903 pw.println("Users:"); 1904 for (int i = 0; i < mUsers.size(); i++) { 1905 UserInfo user = mUsers.valueAt(i); 1906 if (user == null) continue; 1907 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1908 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1909 if (user.partial) pw.print(" <partial>"); 1910 pw.println(); 1911 pw.print(" Created: "); 1912 if (user.creationTime == 0) { 1913 pw.println("<unknown>"); 1914 } else { 1915 sb.setLength(0); 1916 TimeUtils.formatDuration(now - user.creationTime, sb); 1917 sb.append(" ago"); 1918 pw.println(sb); 1919 } 1920 pw.print(" Last logged in: "); 1921 if (user.lastLoggedInTime == 0) { 1922 pw.println("<unknown>"); 1923 } else { 1924 sb.setLength(0); 1925 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1926 sb.append(" ago"); 1927 pw.println(sb); 1928 } 1929 } 1930 } 1931 } 1932} 1933