UserManagerService.java revision 12678a99f12ae20fa8518bb8199c35d52be17954
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.util.ArrayList; 74import java.util.List; 75 76public class UserManagerService extends IUserManager.Stub { 77 78 private static final String LOG_TAG = "UserManagerService"; 79 80 private static final boolean DBG = false; 81 82 private static final String TAG_NAME = "name"; 83 private static final String ATTR_FLAGS = "flags"; 84 private static final String ATTR_ICON_PATH = "icon"; 85 private static final String ATTR_ID = "id"; 86 private static final String ATTR_CREATION_TIME = "created"; 87 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 88 private static final String ATTR_SALT = "salt"; 89 private static final String ATTR_PIN_HASH = "pinHash"; 90 private static final String ATTR_FAILED_ATTEMPTS = "failedAttempts"; 91 private static final String ATTR_LAST_RETRY_MS = "lastAttemptMs"; 92 private static final String ATTR_SERIAL_NO = "serialNumber"; 93 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 94 private static final String ATTR_PARTIAL = "partial"; 95 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 96 private static final String ATTR_USER_VERSION = "version"; 97 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 98 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 99 private static final String TAG_USERS = "users"; 100 private static final String TAG_USER = "user"; 101 private static final String TAG_RESTRICTIONS = "restrictions"; 102 private static final String TAG_ENTRY = "entry"; 103 private static final String TAG_VALUE = "value"; 104 private static final String ATTR_KEY = "key"; 105 private static final String ATTR_VALUE_TYPE = "type"; 106 private static final String ATTR_MULTIPLE = "m"; 107 108 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 109 private static final String ATTR_TYPE_STRING = "s"; 110 private static final String ATTR_TYPE_BOOLEAN = "b"; 111 private static final String ATTR_TYPE_INTEGER = "i"; 112 113 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 114 private static final String USER_LIST_FILENAME = "userlist.xml"; 115 private static final String USER_PHOTO_FILENAME = "photo.png"; 116 117 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 118 private static final String XML_SUFFIX = ".xml"; 119 120 private static final int MIN_USER_ID = 10; 121 122 private static final int USER_VERSION = 5; 123 124 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 125 126 // Number of attempts before jumping to the next BACKOFF_TIMES slot 127 private static final int BACKOFF_INC_INTERVAL = 5; 128 129 // Maximum number of managed profiles permitted is 1. This cannot be increased 130 // without first making sure that the rest of the framework is prepared for it. 131 private static final int MAX_MANAGED_PROFILES = 1; 132 133 // Amount of time to force the user to wait before entering the PIN again, after failing 134 // BACKOFF_INC_INTERVAL times. 135 private static final int[] BACKOFF_TIMES = { 0, 30*1000, 60*1000, 5*60*1000, 30*60*1000 }; 136 137 138 private final Context mContext; 139 private final PackageManagerService mPm; 140 private final Object mInstallLock; 141 private final Object mPackagesLock; 142 143 private final Handler mHandler; 144 145 private final File mUsersDir; 146 private final File mUserListFile; 147 private final File mBaseUserPath; 148 149 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 150 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 151 private final Bundle mGuestRestrictions = new Bundle(); 152 153 class RestrictionsPinState { 154 long salt; 155 String pinHash; 156 int failedAttempts; 157 long lastAttemptTime; 158 } 159 160 private final SparseArray<RestrictionsPinState> mRestrictionsPinStates = 161 new SparseArray<RestrictionsPinState>(); 162 163 /** 164 * Set of user IDs being actively removed. Removed IDs linger in this set 165 * for several seconds to work around a VFS caching issue. 166 */ 167 // @GuardedBy("mPackagesLock") 168 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 169 170 private int[] mUserIds; 171 private int mNextSerialNumber; 172 private int mUserVersion = 0; 173 174 private IAppOpsService mAppOpsService; 175 176 private static UserManagerService sInstance; 177 178 public static UserManagerService getInstance() { 179 synchronized (UserManagerService.class) { 180 return sInstance; 181 } 182 } 183 184 /** 185 * Available for testing purposes. 186 */ 187 UserManagerService(File dataDir, File baseUserPath) { 188 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 189 } 190 191 /** 192 * Called by package manager to create the service. This is closely 193 * associated with the package manager, and the given lock is the 194 * package manager's own lock. 195 */ 196 UserManagerService(Context context, PackageManagerService pm, 197 Object installLock, Object packagesLock) { 198 this(context, pm, installLock, packagesLock, 199 Environment.getDataDirectory(), 200 new File(Environment.getDataDirectory(), "user")); 201 } 202 203 /** 204 * Available for testing purposes. 205 */ 206 private UserManagerService(Context context, PackageManagerService pm, 207 Object installLock, Object packagesLock, 208 File dataDir, File baseUserPath) { 209 mContext = context; 210 mPm = pm; 211 mInstallLock = installLock; 212 mPackagesLock = packagesLock; 213 mHandler = new Handler(); 214 synchronized (mInstallLock) { 215 synchronized (mPackagesLock) { 216 mUsersDir = new File(dataDir, USER_INFO_DIR); 217 mUsersDir.mkdirs(); 218 // Make zeroth user directory, for services to migrate their files to that location 219 File userZeroDir = new File(mUsersDir, "0"); 220 userZeroDir.mkdirs(); 221 mBaseUserPath = baseUserPath; 222 FileUtils.setPermissions(mUsersDir.toString(), 223 FileUtils.S_IRWXU|FileUtils.S_IRWXG 224 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 225 -1, -1); 226 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 227 initDefaultGuestRestrictions(); 228 readUserListLocked(); 229 // Prune out any partially created/partially removed users. 230 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 231 for (int i = 0; i < mUsers.size(); i++) { 232 UserInfo ui = mUsers.valueAt(i); 233 if ((ui.partial || ui.guestToRemove) && i != 0) { 234 partials.add(ui); 235 } 236 } 237 for (int i = 0; i < partials.size(); i++) { 238 UserInfo ui = partials.get(i); 239 Slog.w(LOG_TAG, "Removing partially created user #" + i 240 + " (name=" + ui.name + ")"); 241 removeUserStateLocked(ui.id); 242 } 243 sInstance = this; 244 } 245 } 246 } 247 248 void systemReady() { 249 userForeground(UserHandle.USER_OWNER); 250 mAppOpsService = IAppOpsService.Stub.asInterface( 251 ServiceManager.getService(Context.APP_OPS_SERVICE)); 252 for (int i = 0; i < mUserIds.length; ++i) { 253 try { 254 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 255 } catch (RemoteException e) { 256 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 257 } 258 } 259 } 260 261 @Override 262 public List<UserInfo> getUsers(boolean excludeDying) { 263 checkManageUsersPermission("query users"); 264 synchronized (mPackagesLock) { 265 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 266 for (int i = 0; i < mUsers.size(); i++) { 267 UserInfo ui = mUsers.valueAt(i); 268 if (ui.partial) { 269 continue; 270 } 271 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 272 users.add(ui); 273 } 274 } 275 return users; 276 } 277 } 278 279 @Override 280 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 281 if (userId != UserHandle.getCallingUserId()) { 282 checkManageUsersPermission("getting profiles related to user " + userId); 283 } 284 final long ident = Binder.clearCallingIdentity(); 285 try { 286 synchronized (mPackagesLock) { 287 return getProfilesLocked(userId, enabledOnly); 288 } 289 } finally { 290 Binder.restoreCallingIdentity(ident); 291 } 292 } 293 294 /** Assume permissions already checked and caller's identity cleared */ 295 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 296 UserInfo user = getUserInfoLocked(userId); 297 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 298 if (user == null) { 299 // Probably a dying user 300 return users; 301 } 302 for (int i = 0; i < mUsers.size(); i++) { 303 UserInfo profile = mUsers.valueAt(i); 304 if (!isProfileOf(user, profile)) { 305 continue; 306 } 307 if (enabledOnly && !profile.isEnabled()) { 308 continue; 309 } 310 if (mRemovingUserIds.get(profile.id)) { 311 continue; 312 } 313 users.add(profile); 314 } 315 return users; 316 } 317 318 @Override 319 public UserInfo getProfileParent(int userHandle) { 320 checkManageUsersPermission("get the profile parent"); 321 synchronized (mPackagesLock) { 322 UserInfo profile = getUserInfoLocked(userHandle); 323 if (profile == null) { 324 return null; 325 } 326 int parentUserId = profile.profileGroupId; 327 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 328 return null; 329 } else { 330 return getUserInfoLocked(parentUserId); 331 } 332 } 333 } 334 335 private boolean isProfileOf(UserInfo user, UserInfo profile) { 336 return user.id == profile.id || 337 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 338 && user.profileGroupId == profile.profileGroupId); 339 } 340 341 @Override 342 public void setUserEnabled(int userId) { 343 checkManageUsersPermission("enable user"); 344 synchronized (mPackagesLock) { 345 UserInfo info = getUserInfoLocked(userId); 346 if (info != null && !info.isEnabled()) { 347 info.flags ^= UserInfo.FLAG_DISABLED; 348 writeUserLocked(info); 349 } 350 } 351 } 352 353 @Override 354 public UserInfo getUserInfo(int userId) { 355 checkManageUsersPermission("query user"); 356 synchronized (mPackagesLock) { 357 return getUserInfoLocked(userId); 358 } 359 } 360 361 @Override 362 public boolean isRestricted() { 363 synchronized (mPackagesLock) { 364 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 365 } 366 } 367 368 /* 369 * Should be locked on mUsers before calling this. 370 */ 371 private UserInfo getUserInfoLocked(int userId) { 372 UserInfo ui = mUsers.get(userId); 373 // If it is partial and not in the process of being removed, return as unknown user. 374 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 375 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 376 return null; 377 } 378 return ui; 379 } 380 381 public boolean exists(int userId) { 382 synchronized (mPackagesLock) { 383 return ArrayUtils.contains(mUserIds, userId); 384 } 385 } 386 387 @Override 388 public void setUserName(int userId, String name) { 389 checkManageUsersPermission("rename users"); 390 boolean changed = false; 391 synchronized (mPackagesLock) { 392 UserInfo info = mUsers.get(userId); 393 if (info == null || info.partial) { 394 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 395 return; 396 } 397 if (name != null && !name.equals(info.name)) { 398 info.name = name; 399 writeUserLocked(info); 400 changed = true; 401 } 402 } 403 if (changed) { 404 sendUserInfoChangedBroadcast(userId); 405 } 406 } 407 408 @Override 409 public void setUserIcon(int userId, Bitmap bitmap) { 410 checkManageUsersPermission("update users"); 411 long ident = Binder.clearCallingIdentity(); 412 try { 413 synchronized (mPackagesLock) { 414 UserInfo info = mUsers.get(userId); 415 if (info == null || info.partial) { 416 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 417 return; 418 } 419 writeBitmapLocked(info, bitmap); 420 writeUserLocked(info); 421 } 422 sendUserInfoChangedBroadcast(userId); 423 } finally { 424 Binder.restoreCallingIdentity(ident); 425 } 426 } 427 428 private void sendUserInfoChangedBroadcast(int userId) { 429 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 430 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 431 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 432 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 433 } 434 435 @Override 436 public Bitmap getUserIcon(int userId) { 437 synchronized (mPackagesLock) { 438 UserInfo info = mUsers.get(userId); 439 if (info == null || info.partial) { 440 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 441 return null; 442 } 443 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 444 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 445 || callingGroupId != info.profileGroupId) { 446 checkManageUsersPermission("get the icon of a user who is not related"); 447 } 448 if (info.iconPath == null) { 449 return null; 450 } 451 return BitmapFactory.decodeFile(info.iconPath); 452 } 453 } 454 455 public void makeInitialized(int userId) { 456 checkManageUsersPermission("makeInitialized"); 457 synchronized (mPackagesLock) { 458 UserInfo info = mUsers.get(userId); 459 if (info == null || info.partial) { 460 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 461 } 462 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 463 info.flags |= UserInfo.FLAG_INITIALIZED; 464 writeUserLocked(info); 465 } 466 } 467 } 468 469 /** 470 * If default guest restrictions haven't been initialized yet, add the basic 471 * restrictions. 472 */ 473 private void initDefaultGuestRestrictions() { 474 if (mGuestRestrictions.isEmpty()) { 475 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 476 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 477 } 478 } 479 480 @Override 481 public Bundle getDefaultGuestRestrictions() { 482 checkManageUsersPermission("getDefaultGuestRestrictions"); 483 synchronized (mPackagesLock) { 484 return new Bundle(mGuestRestrictions); 485 } 486 } 487 488 @Override 489 public void setDefaultGuestRestrictions(Bundle restrictions) { 490 checkManageUsersPermission("setDefaultGuestRestrictions"); 491 synchronized (mPackagesLock) { 492 mGuestRestrictions.clear(); 493 mGuestRestrictions.putAll(restrictions); 494 writeUserListLocked(); 495 } 496 } 497 498 @Override 499 public boolean hasUserRestriction(String restrictionKey, int userId) { 500 synchronized (mPackagesLock) { 501 Bundle restrictions = mUserRestrictions.get(userId); 502 return restrictions != null ? restrictions.getBoolean(restrictionKey) : false; 503 } 504 } 505 506 @Override 507 public Bundle getUserRestrictions(int userId) { 508 // checkManageUsersPermission("getUserRestrictions"); 509 510 synchronized (mPackagesLock) { 511 Bundle restrictions = mUserRestrictions.get(userId); 512 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 513 } 514 } 515 516 @Override 517 public void setUserRestrictions(Bundle restrictions, int userId) { 518 checkManageUsersPermission("setUserRestrictions"); 519 if (restrictions == null) return; 520 521 synchronized (mPackagesLock) { 522 mUserRestrictions.get(userId).clear(); 523 mUserRestrictions.get(userId).putAll(restrictions); 524 long token = Binder.clearCallingIdentity(); 525 try { 526 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 527 } catch (RemoteException e) { 528 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 529 } finally { 530 Binder.restoreCallingIdentity(token); 531 } 532 writeUserLocked(mUsers.get(userId)); 533 } 534 } 535 536 /** 537 * Check if we've hit the limit of how many users can be created. 538 */ 539 private boolean isUserLimitReachedLocked() { 540 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 541 } 542 543 @Override 544 public boolean canAddMoreManagedProfiles() { 545 checkManageUsersPermission("check if more managed profiles can be added."); 546 if (ActivityManager.isLowRamDeviceStatic()) { 547 return false; 548 } 549 synchronized(mPackagesLock) { 550 // Limit number of managed profiles that can be created 551 if (numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 552 >= MAX_MANAGED_PROFILES) { 553 return false; 554 } 555 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 556 // We allow creating a managed profile in the special case where there is only one user. 557 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 558 } 559 } 560 561 private int getAliveUsersExcludingGuestsCountLocked() { 562 int aliveUserCount = 0; 563 final int totalUserCount = mUsers.size(); 564 // Skip over users being removed 565 for (int i = 0; i < totalUserCount; i++) { 566 UserInfo user = mUsers.valueAt(i); 567 if (!mRemovingUserIds.get(user.id) 568 && !user.isGuest() && !user.partial) { 569 aliveUserCount++; 570 } 571 } 572 return aliveUserCount; 573 } 574 575 /** 576 * Enforces that only the system UID or root's UID or apps that have the 577 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 578 * permission can make certain calls to the UserManager. 579 * 580 * @param message used as message if SecurityException is thrown 581 * @throws SecurityException if the caller is not system or root 582 */ 583 private static final void checkManageUsersPermission(String message) { 584 final int uid = Binder.getCallingUid(); 585 if (uid != Process.SYSTEM_UID && uid != 0 586 && ActivityManager.checkComponentPermission( 587 android.Manifest.permission.MANAGE_USERS, 588 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 589 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 590 } 591 } 592 593 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 594 try { 595 File dir = new File(mUsersDir, Integer.toString(info.id)); 596 File file = new File(dir, USER_PHOTO_FILENAME); 597 if (!dir.exists()) { 598 dir.mkdir(); 599 FileUtils.setPermissions( 600 dir.getPath(), 601 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 602 -1, -1); 603 } 604 FileOutputStream os; 605 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 606 info.iconPath = file.getAbsolutePath(); 607 } 608 try { 609 os.close(); 610 } catch (IOException ioe) { 611 // What the ... ! 612 } 613 } catch (FileNotFoundException e) { 614 Slog.w(LOG_TAG, "Error setting photo for user ", e); 615 } 616 } 617 618 /** 619 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 620 * cache it elsewhere. 621 * @return the array of user ids. 622 */ 623 public int[] getUserIds() { 624 synchronized (mPackagesLock) { 625 return mUserIds; 626 } 627 } 628 629 int[] getUserIdsLPr() { 630 return mUserIds; 631 } 632 633 private void readUserListLocked() { 634 if (!mUserListFile.exists()) { 635 fallbackToSingleUserLocked(); 636 return; 637 } 638 FileInputStream fis = null; 639 AtomicFile userListFile = new AtomicFile(mUserListFile); 640 try { 641 fis = userListFile.openRead(); 642 XmlPullParser parser = Xml.newPullParser(); 643 parser.setInput(fis, null); 644 int type; 645 while ((type = parser.next()) != XmlPullParser.START_TAG 646 && type != XmlPullParser.END_DOCUMENT) { 647 ; 648 } 649 650 if (type != XmlPullParser.START_TAG) { 651 Slog.e(LOG_TAG, "Unable to read user list"); 652 fallbackToSingleUserLocked(); 653 return; 654 } 655 656 mNextSerialNumber = -1; 657 if (parser.getName().equals(TAG_USERS)) { 658 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 659 if (lastSerialNumber != null) { 660 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 661 } 662 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 663 if (versionNumber != null) { 664 mUserVersion = Integer.parseInt(versionNumber); 665 } 666 } 667 668 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 669 if (type == XmlPullParser.START_TAG) { 670 final String name = parser.getName(); 671 if (name.equals(TAG_USER)) { 672 String id = parser.getAttributeValue(null, ATTR_ID); 673 UserInfo user = readUserLocked(Integer.parseInt(id)); 674 675 if (user != null) { 676 mUsers.put(user.id, user); 677 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 678 mNextSerialNumber = user.id + 1; 679 } 680 } 681 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 682 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 683 && type != XmlPullParser.END_TAG) { 684 if (type == XmlPullParser.START_TAG) { 685 if (parser.getName().equals(TAG_RESTRICTIONS)) { 686 readRestrictionsLocked(parser, mGuestRestrictions); 687 } 688 break; 689 } 690 } 691 } 692 } 693 } 694 updateUserIdsLocked(); 695 upgradeIfNecessaryLocked(); 696 } catch (IOException ioe) { 697 fallbackToSingleUserLocked(); 698 } catch (XmlPullParserException pe) { 699 fallbackToSingleUserLocked(); 700 } finally { 701 if (fis != null) { 702 try { 703 fis.close(); 704 } catch (IOException e) { 705 } 706 } 707 } 708 } 709 710 /** 711 * Upgrade steps between versions, either for fixing bugs or changing the data format. 712 */ 713 private void upgradeIfNecessaryLocked() { 714 int userVersion = mUserVersion; 715 if (userVersion < 1) { 716 // Assign a proper name for the owner, if not initialized correctly before 717 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 718 if ("Primary".equals(user.name)) { 719 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 720 writeUserLocked(user); 721 } 722 userVersion = 1; 723 } 724 725 if (userVersion < 2) { 726 // Owner should be marked as initialized 727 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 728 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 729 user.flags |= UserInfo.FLAG_INITIALIZED; 730 writeUserLocked(user); 731 } 732 userVersion = 2; 733 } 734 735 736 if (userVersion < 4) { 737 userVersion = 4; 738 } 739 740 if (userVersion < 5) { 741 initDefaultGuestRestrictions(); 742 userVersion = 5; 743 } 744 745 if (userVersion < USER_VERSION) { 746 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 747 + USER_VERSION); 748 } else { 749 mUserVersion = userVersion; 750 writeUserListLocked(); 751 } 752 } 753 754 private void fallbackToSingleUserLocked() { 755 // Create the primary user 756 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 757 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 758 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 759 mUsers.put(0, primary); 760 mNextSerialNumber = MIN_USER_ID; 761 mUserVersion = USER_VERSION; 762 763 Bundle restrictions = new Bundle(); 764 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 765 766 updateUserIdsLocked(); 767 initDefaultGuestRestrictions(); 768 769 writeUserListLocked(); 770 writeUserLocked(primary); 771 } 772 773 /* 774 * Writes the user file in this format: 775 * 776 * <user flags="20039023" id="0"> 777 * <name>Primary</name> 778 * </user> 779 */ 780 private void writeUserLocked(UserInfo userInfo) { 781 FileOutputStream fos = null; 782 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 783 try { 784 fos = userFile.startWrite(); 785 final BufferedOutputStream bos = new BufferedOutputStream(fos); 786 787 // XmlSerializer serializer = XmlUtils.serializerInstance(); 788 final XmlSerializer serializer = new FastXmlSerializer(); 789 serializer.setOutput(bos, "utf-8"); 790 serializer.startDocument(null, true); 791 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 792 793 serializer.startTag(null, TAG_USER); 794 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 795 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 796 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 797 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 798 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 799 Long.toString(userInfo.lastLoggedInTime)); 800 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 801 if (pinState != null) { 802 if (pinState.salt != 0) { 803 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 804 } 805 if (pinState.pinHash != null) { 806 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 807 } 808 if (pinState.failedAttempts != 0) { 809 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 810 Integer.toString(pinState.failedAttempts)); 811 serializer.attribute(null, ATTR_LAST_RETRY_MS, 812 Long.toString(pinState.lastAttemptTime)); 813 } 814 } 815 if (userInfo.iconPath != null) { 816 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 817 } 818 if (userInfo.partial) { 819 serializer.attribute(null, ATTR_PARTIAL, "true"); 820 } 821 if (userInfo.guestToRemove) { 822 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 823 } 824 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 825 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 826 Integer.toString(userInfo.profileGroupId)); 827 } 828 829 serializer.startTag(null, TAG_NAME); 830 serializer.text(userInfo.name); 831 serializer.endTag(null, TAG_NAME); 832 Bundle restrictions = mUserRestrictions.get(userInfo.id); 833 if (restrictions != null) { 834 writeRestrictionsLocked(serializer, restrictions); 835 } 836 serializer.endTag(null, TAG_USER); 837 838 serializer.endDocument(); 839 userFile.finishWrite(fos); 840 } catch (Exception ioe) { 841 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 842 userFile.failWrite(fos); 843 } 844 } 845 846 /* 847 * Writes the user list file in this format: 848 * 849 * <users nextSerialNumber="3"> 850 * <user id="0"></user> 851 * <user id="2"></user> 852 * </users> 853 */ 854 private void writeUserListLocked() { 855 FileOutputStream fos = null; 856 AtomicFile userListFile = new AtomicFile(mUserListFile); 857 try { 858 fos = userListFile.startWrite(); 859 final BufferedOutputStream bos = new BufferedOutputStream(fos); 860 861 // XmlSerializer serializer = XmlUtils.serializerInstance(); 862 final XmlSerializer serializer = new FastXmlSerializer(); 863 serializer.setOutput(bos, "utf-8"); 864 serializer.startDocument(null, true); 865 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 866 867 serializer.startTag(null, TAG_USERS); 868 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 869 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 870 871 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 872 writeRestrictionsLocked(serializer, mGuestRestrictions); 873 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 874 for (int i = 0; i < mUsers.size(); i++) { 875 UserInfo user = mUsers.valueAt(i); 876 serializer.startTag(null, TAG_USER); 877 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 878 serializer.endTag(null, TAG_USER); 879 } 880 881 serializer.endTag(null, TAG_USERS); 882 883 serializer.endDocument(); 884 userListFile.finishWrite(fos); 885 } catch (Exception e) { 886 userListFile.failWrite(fos); 887 Slog.e(LOG_TAG, "Error writing user list"); 888 } 889 } 890 891 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 892 throws IOException { 893 serializer.startTag(null, TAG_RESTRICTIONS); 894 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 895 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 896 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 897 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 898 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 899 writeBoolean(serializer, restrictions, 900 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 901 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 902 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 903 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 904 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 905 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 906 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 907 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 908 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 909 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 910 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 911 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 912 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 913 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 914 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 915 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 916 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 917 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 918 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 919 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 920 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 921 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 922 serializer.endTag(null, TAG_RESTRICTIONS); 923 } 924 925 private UserInfo readUserLocked(int id) { 926 int flags = 0; 927 int serialNumber = id; 928 String name = null; 929 String iconPath = null; 930 long creationTime = 0L; 931 long lastLoggedInTime = 0L; 932 long salt = 0L; 933 String pinHash = null; 934 int failedAttempts = 0; 935 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 936 long lastAttemptTime = 0L; 937 boolean partial = false; 938 boolean guestToRemove = false; 939 Bundle restrictions = new Bundle(); 940 941 FileInputStream fis = null; 942 try { 943 AtomicFile userFile = 944 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 945 fis = userFile.openRead(); 946 XmlPullParser parser = Xml.newPullParser(); 947 parser.setInput(fis, null); 948 int type; 949 while ((type = parser.next()) != XmlPullParser.START_TAG 950 && type != XmlPullParser.END_DOCUMENT) { 951 ; 952 } 953 954 if (type != XmlPullParser.START_TAG) { 955 Slog.e(LOG_TAG, "Unable to read user " + id); 956 return null; 957 } 958 959 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 960 int storedId = readIntAttribute(parser, ATTR_ID, -1); 961 if (storedId != id) { 962 Slog.e(LOG_TAG, "User id does not match the file name"); 963 return null; 964 } 965 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 966 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 967 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 968 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 969 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 970 salt = readLongAttribute(parser, ATTR_SALT, 0L); 971 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 972 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 973 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 974 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 975 UserInfo.NO_PROFILE_GROUP_ID); 976 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 977 // This attribute was added and renamed during development of L. 978 // TODO Remove upgrade path by 1st May 2014 979 profileGroupId = readIntAttribute(parser, "relatedGroupId", 980 UserInfo.NO_PROFILE_GROUP_ID); 981 } 982 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 983 if ("true".equals(valueString)) { 984 partial = true; 985 } 986 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 987 if ("true".equals(valueString)) { 988 guestToRemove = true; 989 } 990 991 int outerDepth = parser.getDepth(); 992 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 993 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 994 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 995 continue; 996 } 997 String tag = parser.getName(); 998 if (TAG_NAME.equals(tag)) { 999 type = parser.next(); 1000 if (type == XmlPullParser.TEXT) { 1001 name = parser.getText(); 1002 } 1003 } else if (TAG_RESTRICTIONS.equals(tag)) { 1004 readRestrictionsLocked(parser, restrictions); 1005 } 1006 } 1007 } 1008 1009 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1010 userInfo.serialNumber = serialNumber; 1011 userInfo.creationTime = creationTime; 1012 userInfo.lastLoggedInTime = lastLoggedInTime; 1013 userInfo.partial = partial; 1014 userInfo.guestToRemove = guestToRemove; 1015 userInfo.profileGroupId = profileGroupId; 1016 mUserRestrictions.append(id, restrictions); 1017 if (salt != 0L) { 1018 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 1019 if (pinState == null) { 1020 pinState = new RestrictionsPinState(); 1021 mRestrictionsPinStates.put(id, pinState); 1022 } 1023 pinState.salt = salt; 1024 pinState.pinHash = pinHash; 1025 pinState.failedAttempts = failedAttempts; 1026 pinState.lastAttemptTime = lastAttemptTime; 1027 } 1028 return userInfo; 1029 1030 } catch (IOException ioe) { 1031 } catch (XmlPullParserException pe) { 1032 } finally { 1033 if (fis != null) { 1034 try { 1035 fis.close(); 1036 } catch (IOException e) { 1037 } 1038 } 1039 } 1040 return null; 1041 } 1042 1043 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1044 throws IOException { 1045 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1046 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1047 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1048 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1049 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1050 readBoolean(parser, restrictions, 1051 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1052 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1053 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1054 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1055 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1056 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1057 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1058 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1059 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1060 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1061 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1062 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1063 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1064 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1065 readBoolean(parser, restrictions, 1066 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1067 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1068 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1069 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1070 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1071 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1072 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1073 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1074 } 1075 1076 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1077 String restrictionKey) { 1078 String value = parser.getAttributeValue(null, restrictionKey); 1079 if (value != null) { 1080 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1081 } 1082 } 1083 1084 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1085 throws IOException { 1086 if (restrictions.containsKey(restrictionKey)) { 1087 xml.attribute(null, restrictionKey, 1088 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1089 } 1090 } 1091 1092 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1093 String valueString = parser.getAttributeValue(null, attr); 1094 if (valueString == null) return defaultValue; 1095 try { 1096 return Integer.parseInt(valueString); 1097 } catch (NumberFormatException nfe) { 1098 return defaultValue; 1099 } 1100 } 1101 1102 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1103 String valueString = parser.getAttributeValue(null, attr); 1104 if (valueString == null) return defaultValue; 1105 try { 1106 return Long.parseLong(valueString); 1107 } catch (NumberFormatException nfe) { 1108 return defaultValue; 1109 } 1110 } 1111 1112 private boolean isPackageInstalled(String pkg, int userId) { 1113 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1114 PackageManager.GET_UNINSTALLED_PACKAGES, 1115 userId); 1116 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1117 return false; 1118 } 1119 return true; 1120 } 1121 1122 /** 1123 * Removes all the restrictions files (res_<packagename>) for a given user. 1124 * Does not do any permissions checking. 1125 */ 1126 private void cleanAppRestrictions(int userId) { 1127 synchronized (mPackagesLock) { 1128 File dir = Environment.getUserSystemDirectory(userId); 1129 String[] files = dir.list(); 1130 if (files == null) return; 1131 for (String fileName : files) { 1132 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1133 File resFile = new File(dir, fileName); 1134 if (resFile.exists()) { 1135 resFile.delete(); 1136 } 1137 } 1138 } 1139 } 1140 } 1141 1142 /** 1143 * Removes the app restrictions file for a specific package and user id, if it exists. 1144 */ 1145 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1146 synchronized (mPackagesLock) { 1147 File dir = Environment.getUserSystemDirectory(userId); 1148 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1149 if (resFile.exists()) { 1150 resFile.delete(); 1151 } 1152 } 1153 } 1154 1155 @Override 1156 public UserInfo createProfileForUser(String name, int flags, int userId) { 1157 checkManageUsersPermission("Only the system can create users"); 1158 if (userId != UserHandle.USER_OWNER) { 1159 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1160 return null; 1161 } 1162 return createUserInternal(name, flags, userId); 1163 } 1164 1165 @Override 1166 public UserInfo createUser(String name, int flags) { 1167 checkManageUsersPermission("Only the system can create users"); 1168 return createUserInternal(name, flags, UserHandle.USER_NULL); 1169 } 1170 1171 private UserInfo createUserInternal(String name, int flags, int parentId) { 1172 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1173 UserManager.DISALLOW_ADD_USER, false)) { 1174 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1175 return null; 1176 } 1177 if (ActivityManager.isLowRamDeviceStatic()) { 1178 return null; 1179 } 1180 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1181 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1182 final long ident = Binder.clearCallingIdentity(); 1183 UserInfo userInfo = null; 1184 try { 1185 synchronized (mInstallLock) { 1186 synchronized (mPackagesLock) { 1187 UserInfo parent = null; 1188 if (parentId != UserHandle.USER_NULL) { 1189 parent = getUserInfoLocked(parentId); 1190 if (parent == null) return null; 1191 } 1192 if (isManagedProfile && !canAddMoreManagedProfiles()) { 1193 return null; 1194 } 1195 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1196 // If we're not adding a guest user or a managed profile and the limit has 1197 // been reached, cannot add a user. 1198 return null; 1199 } 1200 // If we're adding a guest and there already exists one, bail. 1201 if (isGuest && findCurrentGuestUserLocked() != null) { 1202 return null; 1203 } 1204 int userId = getNextAvailableIdLocked(); 1205 userInfo = new UserInfo(userId, name, null, flags); 1206 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1207 userInfo.serialNumber = mNextSerialNumber++; 1208 long now = System.currentTimeMillis(); 1209 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1210 userInfo.partial = true; 1211 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1212 mUsers.put(userId, userInfo); 1213 writeUserListLocked(); 1214 if (parent != null) { 1215 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1216 parent.profileGroupId = parent.id; 1217 writeUserLocked(parent); 1218 } 1219 userInfo.profileGroupId = parent.profileGroupId; 1220 } 1221 writeUserLocked(userInfo); 1222 mPm.createNewUserLILPw(userId, userPath); 1223 userInfo.partial = false; 1224 writeUserLocked(userInfo); 1225 updateUserIdsLocked(); 1226 Bundle restrictions = new Bundle(); 1227 mUserRestrictions.append(userId, restrictions); 1228 } 1229 } 1230 if (userInfo != null) { 1231 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1232 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1233 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1234 android.Manifest.permission.MANAGE_USERS); 1235 } 1236 } finally { 1237 Binder.restoreCallingIdentity(ident); 1238 } 1239 return userInfo; 1240 } 1241 1242 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1243 int count = 0; 1244 for (int i = mUsers.size() - 1; i >= 0; i--) { 1245 UserInfo user = mUsers.valueAt(i); 1246 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1247 if ((user.flags & flags) != 0) { 1248 count++; 1249 } 1250 } 1251 } 1252 return count; 1253 } 1254 1255 /** 1256 * Find the current guest user. If the Guest user is partial, 1257 * then do not include it in the results as it is about to die. 1258 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1259 * the special handling of Guests being removed. 1260 */ 1261 private UserInfo findCurrentGuestUserLocked() { 1262 final int size = mUsers.size(); 1263 for (int i = 0; i < size; i++) { 1264 final UserInfo user = mUsers.valueAt(i); 1265 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1266 return user; 1267 } 1268 } 1269 return null; 1270 } 1271 1272 /** 1273 * Mark this guest user for deletion to allow us to create another guest 1274 * and switch to that user before actually removing this guest. 1275 * @param userHandle the userid of the current guest 1276 * @return whether the user could be marked for deletion 1277 */ 1278 public boolean markGuestForDeletion(int userHandle) { 1279 checkManageUsersPermission("Only the system can remove users"); 1280 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1281 UserManager.DISALLOW_REMOVE_USER, false)) { 1282 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1283 return false; 1284 } 1285 1286 long ident = Binder.clearCallingIdentity(); 1287 try { 1288 final UserInfo user; 1289 synchronized (mPackagesLock) { 1290 user = mUsers.get(userHandle); 1291 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1292 return false; 1293 } 1294 if (!user.isGuest()) { 1295 return false; 1296 } 1297 // We set this to a guest user that is to be removed. This is a temporary state 1298 // where we are allowed to add new Guest users, even if this one is still not 1299 // removed. This user will still show up in getUserInfo() calls. 1300 // If we don't get around to removing this Guest user, it will be purged on next 1301 // startup. 1302 user.guestToRemove = true; 1303 // Mark it as disabled, so that it isn't returned any more when 1304 // profiles are queried. 1305 user.flags |= UserInfo.FLAG_DISABLED; 1306 writeUserLocked(user); 1307 } 1308 } finally { 1309 Binder.restoreCallingIdentity(ident); 1310 } 1311 return true; 1312 } 1313 1314 /** 1315 * Removes a user and all data directories created for that user. This method should be called 1316 * after the user's processes have been terminated. 1317 * @param userHandle the user's id 1318 */ 1319 public boolean removeUser(int userHandle) { 1320 checkManageUsersPermission("Only the system can remove users"); 1321 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1322 UserManager.DISALLOW_REMOVE_USER, false)) { 1323 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1324 return false; 1325 } 1326 1327 long ident = Binder.clearCallingIdentity(); 1328 try { 1329 final UserInfo user; 1330 synchronized (mPackagesLock) { 1331 user = mUsers.get(userHandle); 1332 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1333 return false; 1334 } 1335 1336 // We remember deleted user IDs to prevent them from being 1337 // reused during the current boot; they can still be reused 1338 // after a reboot. 1339 mRemovingUserIds.put(userHandle, true); 1340 1341 try { 1342 mAppOpsService.removeUser(userHandle); 1343 } catch (RemoteException e) { 1344 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1345 } 1346 // Set this to a partially created user, so that the user will be purged 1347 // on next startup, in case the runtime stops now before stopping and 1348 // removing the user completely. 1349 user.partial = true; 1350 // Mark it as disabled, so that it isn't returned any more when 1351 // profiles are queried. 1352 user.flags |= UserInfo.FLAG_DISABLED; 1353 writeUserLocked(user); 1354 } 1355 1356 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1357 && user.isManagedProfile()) { 1358 // Send broadcast to notify system that the user removed was a 1359 // managed user. 1360 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1361 } 1362 1363 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1364 int res; 1365 try { 1366 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1367 new IStopUserCallback.Stub() { 1368 @Override 1369 public void userStopped(int userId) { 1370 finishRemoveUser(userId); 1371 } 1372 @Override 1373 public void userStopAborted(int userId) { 1374 } 1375 }); 1376 } catch (RemoteException e) { 1377 return false; 1378 } 1379 return res == ActivityManager.USER_OP_SUCCESS; 1380 } finally { 1381 Binder.restoreCallingIdentity(ident); 1382 } 1383 } 1384 1385 void finishRemoveUser(final int userHandle) { 1386 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1387 // Let other services shutdown any activity and clean up their state before completely 1388 // wiping the user's system directory and removing from the user list 1389 long ident = Binder.clearCallingIdentity(); 1390 try { 1391 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1392 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1393 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1394 android.Manifest.permission.MANAGE_USERS, 1395 1396 new BroadcastReceiver() { 1397 @Override 1398 public void onReceive(Context context, Intent intent) { 1399 if (DBG) { 1400 Slog.i(LOG_TAG, 1401 "USER_REMOVED broadcast sent, cleaning up user data " 1402 + userHandle); 1403 } 1404 new Thread() { 1405 public void run() { 1406 synchronized (mInstallLock) { 1407 synchronized (mPackagesLock) { 1408 removeUserStateLocked(userHandle); 1409 } 1410 } 1411 } 1412 }.start(); 1413 } 1414 }, 1415 1416 null, Activity.RESULT_OK, null, null); 1417 } finally { 1418 Binder.restoreCallingIdentity(ident); 1419 } 1420 } 1421 1422 private void removeUserStateLocked(final int userHandle) { 1423 // Cleanup package manager settings 1424 mPm.cleanUpUserLILPw(this, userHandle); 1425 1426 // Remove this user from the list 1427 mUsers.remove(userHandle); 1428 1429 mRestrictionsPinStates.remove(userHandle); 1430 // Remove user file 1431 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1432 userFile.delete(); 1433 // Update the user list 1434 writeUserListLocked(); 1435 updateUserIdsLocked(); 1436 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1437 } 1438 1439 private void removeDirectoryRecursive(File parent) { 1440 if (parent.isDirectory()) { 1441 String[] files = parent.list(); 1442 for (String filename : files) { 1443 File child = new File(parent, filename); 1444 removeDirectoryRecursive(child); 1445 } 1446 } 1447 parent.delete(); 1448 } 1449 1450 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1451 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1452 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1453 Intent.FLAG_RECEIVER_FOREGROUND); 1454 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1455 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1456 } 1457 1458 @Override 1459 public Bundle getApplicationRestrictions(String packageName) { 1460 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1461 } 1462 1463 @Override 1464 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1465 if (UserHandle.getCallingUserId() != userId 1466 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1467 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1468 } 1469 synchronized (mPackagesLock) { 1470 // Read the restrictions from XML 1471 return readApplicationRestrictionsLocked(packageName, userId); 1472 } 1473 } 1474 1475 @Override 1476 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1477 int userId) { 1478 if (UserHandle.getCallingUserId() != userId 1479 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1480 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1481 } 1482 synchronized (mPackagesLock) { 1483 if (restrictions == null || restrictions.isEmpty()) { 1484 cleanAppRestrictionsForPackage(packageName, userId); 1485 } else { 1486 // Write the restrictions to XML 1487 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1488 } 1489 } 1490 1491 if (isPackageInstalled(packageName, userId)) { 1492 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1493 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1494 changeIntent.setPackage(packageName); 1495 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1496 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1497 } 1498 } 1499 1500 @Override 1501 public boolean setRestrictionsChallenge(String newPin) { 1502 checkManageUsersPermission("Only system can modify the restrictions pin"); 1503 int userId = UserHandle.getCallingUserId(); 1504 synchronized (mPackagesLock) { 1505 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1506 if (pinState == null) { 1507 pinState = new RestrictionsPinState(); 1508 } 1509 if (newPin == null) { 1510 pinState.salt = 0; 1511 pinState.pinHash = null; 1512 } else { 1513 try { 1514 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1515 } catch (NoSuchAlgorithmException e) { 1516 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1517 } 1518 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1519 pinState.failedAttempts = 0; 1520 } 1521 mRestrictionsPinStates.put(userId, pinState); 1522 writeUserLocked(mUsers.get(userId)); 1523 } 1524 return true; 1525 } 1526 1527 @Override 1528 public int checkRestrictionsChallenge(String pin) { 1529 checkManageUsersPermission("Only system can verify the restrictions pin"); 1530 int userId = UserHandle.getCallingUserId(); 1531 synchronized (mPackagesLock) { 1532 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1533 // If there's no pin set, return error code 1534 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1535 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1536 } else if (pin == null) { 1537 // If just checking if user can be prompted, return remaining time 1538 int waitTime = getRemainingTimeForPinAttempt(pinState); 1539 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1540 return waitTime; 1541 } else { 1542 int waitTime = getRemainingTimeForPinAttempt(pinState); 1543 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1544 if (waitTime > 0) { 1545 return waitTime; 1546 } 1547 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1548 pinState.failedAttempts = 0; 1549 writeUserLocked(mUsers.get(userId)); 1550 return UserManager.PIN_VERIFICATION_SUCCESS; 1551 } else { 1552 pinState.failedAttempts++; 1553 pinState.lastAttemptTime = System.currentTimeMillis(); 1554 writeUserLocked(mUsers.get(userId)); 1555 return waitTime; 1556 } 1557 } 1558 } 1559 } 1560 1561 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1562 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1563 BACKOFF_TIMES.length - 1); 1564 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1565 BACKOFF_TIMES[backoffIndex] : 0; 1566 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1567 0); 1568 } 1569 1570 @Override 1571 public boolean hasRestrictionsChallenge() { 1572 int userId = UserHandle.getCallingUserId(); 1573 synchronized (mPackagesLock) { 1574 return hasRestrictionsPinLocked(userId); 1575 } 1576 } 1577 1578 private boolean hasRestrictionsPinLocked(int userId) { 1579 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1580 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1581 return false; 1582 } 1583 return true; 1584 } 1585 1586 @Override 1587 public void removeRestrictions() { 1588 checkManageUsersPermission("Only system can remove restrictions"); 1589 final int userHandle = UserHandle.getCallingUserId(); 1590 removeRestrictionsForUser(userHandle, true); 1591 } 1592 1593 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1594 synchronized (mPackagesLock) { 1595 // Remove all user restrictions 1596 setUserRestrictions(new Bundle(), userHandle); 1597 // Remove restrictions pin 1598 setRestrictionsChallenge(null); 1599 // Remove any app restrictions 1600 cleanAppRestrictions(userHandle); 1601 } 1602 if (unhideApps) { 1603 unhideAllInstalledAppsForUser(userHandle); 1604 } 1605 } 1606 1607 private void unhideAllInstalledAppsForUser(final int userHandle) { 1608 mHandler.post(new Runnable() { 1609 @Override 1610 public void run() { 1611 List<ApplicationInfo> apps = 1612 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1613 userHandle).getList(); 1614 final long ident = Binder.clearCallingIdentity(); 1615 try { 1616 for (ApplicationInfo appInfo : apps) { 1617 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1618 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1619 != 0) { 1620 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1621 userHandle); 1622 } 1623 } 1624 } finally { 1625 Binder.restoreCallingIdentity(ident); 1626 } 1627 } 1628 }); 1629 } 1630 1631 /* 1632 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1633 * Not the most secure, but it is at least a second level of protection. First level is that 1634 * the file is in a location only readable by the system process. 1635 * @param password the password. 1636 * @param salt the randomly generated salt 1637 * @return the hash of the pattern in a String. 1638 */ 1639 private String passwordToHash(String password, long salt) { 1640 if (password == null) { 1641 return null; 1642 } 1643 String algo = null; 1644 String hashed = salt + password; 1645 try { 1646 byte[] saltedPassword = (password + salt).getBytes(); 1647 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1648 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1649 hashed = toHex(sha1) + toHex(md5); 1650 } catch (NoSuchAlgorithmException e) { 1651 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1652 } 1653 return hashed; 1654 } 1655 1656 private static String toHex(byte[] ary) { 1657 final String hex = "0123456789ABCDEF"; 1658 String ret = ""; 1659 for (int i = 0; i < ary.length; i++) { 1660 ret += hex.charAt((ary[i] >> 4) & 0xf); 1661 ret += hex.charAt(ary[i] & 0xf); 1662 } 1663 return ret; 1664 } 1665 1666 private int getUidForPackage(String packageName) { 1667 long ident = Binder.clearCallingIdentity(); 1668 try { 1669 return mContext.getPackageManager().getApplicationInfo(packageName, 1670 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1671 } catch (NameNotFoundException nnfe) { 1672 return -1; 1673 } finally { 1674 Binder.restoreCallingIdentity(ident); 1675 } 1676 } 1677 1678 private Bundle readApplicationRestrictionsLocked(String packageName, 1679 int userId) { 1680 final Bundle restrictions = new Bundle(); 1681 final ArrayList<String> values = new ArrayList<String>(); 1682 1683 FileInputStream fis = null; 1684 try { 1685 AtomicFile restrictionsFile = 1686 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1687 packageToRestrictionsFileName(packageName))); 1688 fis = restrictionsFile.openRead(); 1689 XmlPullParser parser = Xml.newPullParser(); 1690 parser.setInput(fis, null); 1691 int type; 1692 while ((type = parser.next()) != XmlPullParser.START_TAG 1693 && type != XmlPullParser.END_DOCUMENT) { 1694 ; 1695 } 1696 1697 if (type != XmlPullParser.START_TAG) { 1698 Slog.e(LOG_TAG, "Unable to read restrictions file " 1699 + restrictionsFile.getBaseFile()); 1700 return restrictions; 1701 } 1702 1703 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1704 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1705 String key = parser.getAttributeValue(null, ATTR_KEY); 1706 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1707 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1708 if (multiple != null) { 1709 values.clear(); 1710 int count = Integer.parseInt(multiple); 1711 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1712 if (type == XmlPullParser.START_TAG 1713 && parser.getName().equals(TAG_VALUE)) { 1714 values.add(parser.nextText().trim()); 1715 count--; 1716 } 1717 } 1718 String [] valueStrings = new String[values.size()]; 1719 values.toArray(valueStrings); 1720 restrictions.putStringArray(key, valueStrings); 1721 } else { 1722 String value = parser.nextText().trim(); 1723 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1724 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1725 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1726 restrictions.putInt(key, Integer.parseInt(value)); 1727 } else { 1728 restrictions.putString(key, value); 1729 } 1730 } 1731 } 1732 } 1733 } catch (IOException ioe) { 1734 } catch (XmlPullParserException pe) { 1735 } finally { 1736 if (fis != null) { 1737 try { 1738 fis.close(); 1739 } catch (IOException e) { 1740 } 1741 } 1742 } 1743 return restrictions; 1744 } 1745 1746 private void writeApplicationRestrictionsLocked(String packageName, 1747 Bundle restrictions, int userId) { 1748 FileOutputStream fos = null; 1749 AtomicFile restrictionsFile = new AtomicFile( 1750 new File(Environment.getUserSystemDirectory(userId), 1751 packageToRestrictionsFileName(packageName))); 1752 try { 1753 fos = restrictionsFile.startWrite(); 1754 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1755 1756 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1757 final XmlSerializer serializer = new FastXmlSerializer(); 1758 serializer.setOutput(bos, "utf-8"); 1759 serializer.startDocument(null, true); 1760 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1761 1762 serializer.startTag(null, TAG_RESTRICTIONS); 1763 1764 for (String key : restrictions.keySet()) { 1765 Object value = restrictions.get(key); 1766 serializer.startTag(null, TAG_ENTRY); 1767 serializer.attribute(null, ATTR_KEY, key); 1768 1769 if (value instanceof Boolean) { 1770 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1771 serializer.text(value.toString()); 1772 } else if (value instanceof Integer) { 1773 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1774 serializer.text(value.toString()); 1775 } else if (value == null || value instanceof String) { 1776 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1777 serializer.text(value != null ? (String) value : ""); 1778 } else { 1779 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1780 String[] values = (String[]) value; 1781 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1782 for (String choice : values) { 1783 serializer.startTag(null, TAG_VALUE); 1784 serializer.text(choice != null ? choice : ""); 1785 serializer.endTag(null, TAG_VALUE); 1786 } 1787 } 1788 serializer.endTag(null, TAG_ENTRY); 1789 } 1790 1791 serializer.endTag(null, TAG_RESTRICTIONS); 1792 1793 serializer.endDocument(); 1794 restrictionsFile.finishWrite(fos); 1795 } catch (Exception e) { 1796 restrictionsFile.failWrite(fos); 1797 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1798 } 1799 } 1800 1801 @Override 1802 public int getUserSerialNumber(int userHandle) { 1803 synchronized (mPackagesLock) { 1804 if (!exists(userHandle)) return -1; 1805 return getUserInfoLocked(userHandle).serialNumber; 1806 } 1807 } 1808 1809 @Override 1810 public int getUserHandle(int userSerialNumber) { 1811 synchronized (mPackagesLock) { 1812 for (int userId : mUserIds) { 1813 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1814 } 1815 // Not found 1816 return -1; 1817 } 1818 } 1819 1820 /** 1821 * Caches the list of user ids in an array, adjusting the array size when necessary. 1822 */ 1823 private void updateUserIdsLocked() { 1824 int num = 0; 1825 for (int i = 0; i < mUsers.size(); i++) { 1826 if (!mUsers.valueAt(i).partial) { 1827 num++; 1828 } 1829 } 1830 final int[] newUsers = new int[num]; 1831 int n = 0; 1832 for (int i = 0; i < mUsers.size(); i++) { 1833 if (!mUsers.valueAt(i).partial) { 1834 newUsers[n++] = mUsers.keyAt(i); 1835 } 1836 } 1837 mUserIds = newUsers; 1838 } 1839 1840 /** 1841 * Make a note of the last started time of a user and do some cleanup. 1842 * @param userId the user that was just foregrounded 1843 */ 1844 public void userForeground(int userId) { 1845 synchronized (mPackagesLock) { 1846 UserInfo user = mUsers.get(userId); 1847 long now = System.currentTimeMillis(); 1848 if (user == null || user.partial) { 1849 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1850 return; 1851 } 1852 if (now > EPOCH_PLUS_30_YEARS) { 1853 user.lastLoggedInTime = now; 1854 writeUserLocked(user); 1855 } 1856 } 1857 } 1858 1859 /** 1860 * Returns the next available user id, filling in any holes in the ids. 1861 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1862 * for data and battery stats collection, or unexpected cross-talk. 1863 * @return 1864 */ 1865 private int getNextAvailableIdLocked() { 1866 synchronized (mPackagesLock) { 1867 int i = MIN_USER_ID; 1868 while (i < Integer.MAX_VALUE) { 1869 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1870 break; 1871 } 1872 i++; 1873 } 1874 return i; 1875 } 1876 } 1877 1878 private String packageToRestrictionsFileName(String packageName) { 1879 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1880 } 1881 1882 private String restrictionsFileNameToPackage(String fileName) { 1883 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1884 (int) (fileName.length() - XML_SUFFIX.length())); 1885 } 1886 1887 @Override 1888 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1889 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1890 != PackageManager.PERMISSION_GRANTED) { 1891 pw.println("Permission Denial: can't dump UserManager from from pid=" 1892 + Binder.getCallingPid() 1893 + ", uid=" + Binder.getCallingUid() 1894 + " without permission " 1895 + android.Manifest.permission.DUMP); 1896 return; 1897 } 1898 1899 long now = System.currentTimeMillis(); 1900 StringBuilder sb = new StringBuilder(); 1901 synchronized (mPackagesLock) { 1902 pw.println("Users:"); 1903 for (int i = 0; i < mUsers.size(); i++) { 1904 UserInfo user = mUsers.valueAt(i); 1905 if (user == null) continue; 1906 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1907 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1908 if (user.partial) pw.print(" <partial>"); 1909 pw.println(); 1910 pw.print(" Created: "); 1911 if (user.creationTime == 0) { 1912 pw.println("<unknown>"); 1913 } else { 1914 sb.setLength(0); 1915 TimeUtils.formatDuration(now - user.creationTime, sb); 1916 sb.append(" ago"); 1917 pw.println(sb); 1918 } 1919 pw.print(" Last logged in: "); 1920 if (user.lastLoggedInTime == 0) { 1921 pw.println("<unknown>"); 1922 } else { 1923 sb.setLength(0); 1924 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1925 sb.append(" ago"); 1926 pw.println(sb); 1927 } 1928 } 1929 } 1930 } 1931} 1932