UserManagerService.java revision da0b16825466b9b23c24e1bc2a567afa8e690ec7
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 int parentUserId = profile.profileGroupId; 324 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 325 return null; 326 } else { 327 return getUserInfoLocked(parentUserId); 328 } 329 } 330 } 331 332 private boolean isProfileOf(UserInfo user, UserInfo profile) { 333 return user.id == profile.id || 334 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 335 && user.profileGroupId == profile.profileGroupId); 336 } 337 338 @Override 339 public void setUserEnabled(int userId) { 340 checkManageUsersPermission("enable user"); 341 synchronized (mPackagesLock) { 342 UserInfo info = getUserInfoLocked(userId); 343 if (info != null && !info.isEnabled()) { 344 info.flags ^= UserInfo.FLAG_DISABLED; 345 writeUserLocked(info); 346 } 347 } 348 } 349 350 @Override 351 public UserInfo getUserInfo(int userId) { 352 checkManageUsersPermission("query user"); 353 synchronized (mPackagesLock) { 354 return getUserInfoLocked(userId); 355 } 356 } 357 358 @Override 359 public boolean isRestricted() { 360 synchronized (mPackagesLock) { 361 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 362 } 363 } 364 365 /* 366 * Should be locked on mUsers before calling this. 367 */ 368 private UserInfo getUserInfoLocked(int userId) { 369 UserInfo ui = mUsers.get(userId); 370 // If it is partial and not in the process of being removed, return as unknown user. 371 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 372 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 373 return null; 374 } 375 return ui; 376 } 377 378 public boolean exists(int userId) { 379 synchronized (mPackagesLock) { 380 return ArrayUtils.contains(mUserIds, userId); 381 } 382 } 383 384 @Override 385 public void setUserName(int userId, String name) { 386 checkManageUsersPermission("rename users"); 387 boolean changed = false; 388 synchronized (mPackagesLock) { 389 UserInfo info = mUsers.get(userId); 390 if (info == null || info.partial) { 391 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 392 return; 393 } 394 if (name != null && !name.equals(info.name)) { 395 info.name = name; 396 writeUserLocked(info); 397 changed = true; 398 } 399 } 400 if (changed) { 401 sendUserInfoChangedBroadcast(userId); 402 } 403 } 404 405 @Override 406 public void setUserIcon(int userId, Bitmap bitmap) { 407 checkManageUsersPermission("update users"); 408 long ident = Binder.clearCallingIdentity(); 409 try { 410 synchronized (mPackagesLock) { 411 UserInfo info = mUsers.get(userId); 412 if (info == null || info.partial) { 413 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 414 return; 415 } 416 writeBitmapLocked(info, bitmap); 417 writeUserLocked(info); 418 } 419 sendUserInfoChangedBroadcast(userId); 420 } finally { 421 Binder.restoreCallingIdentity(ident); 422 } 423 } 424 425 private void sendUserInfoChangedBroadcast(int userId) { 426 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 427 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 428 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 429 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 430 } 431 432 @Override 433 public Bitmap getUserIcon(int userId) { 434 synchronized (mPackagesLock) { 435 UserInfo info = mUsers.get(userId); 436 if (info == null || info.partial) { 437 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 438 return null; 439 } 440 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 441 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 442 || callingGroupId != info.profileGroupId) { 443 checkManageUsersPermission("get the icon of a user who is not related"); 444 } 445 if (info.iconPath == null) { 446 return null; 447 } 448 return BitmapFactory.decodeFile(info.iconPath); 449 } 450 } 451 452 public void makeInitialized(int userId) { 453 checkManageUsersPermission("makeInitialized"); 454 synchronized (mPackagesLock) { 455 UserInfo info = mUsers.get(userId); 456 if (info == null || info.partial) { 457 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 458 } 459 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 460 info.flags |= UserInfo.FLAG_INITIALIZED; 461 writeUserLocked(info); 462 } 463 } 464 } 465 466 /** 467 * If default guest restrictions haven't been initialized yet, add the basic 468 * restrictions. 469 */ 470 private void initDefaultGuestRestrictions() { 471 if (mGuestRestrictions.isEmpty()) { 472 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 473 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 474 } 475 } 476 477 @Override 478 public Bundle getDefaultGuestRestrictions() { 479 checkManageUsersPermission("getDefaultGuestRestrictions"); 480 synchronized (mPackagesLock) { 481 return new Bundle(mGuestRestrictions); 482 } 483 } 484 485 @Override 486 public void setDefaultGuestRestrictions(Bundle restrictions) { 487 checkManageUsersPermission("setDefaultGuestRestrictions"); 488 synchronized (mPackagesLock) { 489 mGuestRestrictions.clear(); 490 mGuestRestrictions.putAll(restrictions); 491 writeUserListLocked(); 492 } 493 } 494 495 @Override 496 public boolean hasUserRestriction(String restrictionKey, int userId) { 497 synchronized (mPackagesLock) { 498 Bundle restrictions = mUserRestrictions.get(userId); 499 return restrictions != null ? restrictions.getBoolean(restrictionKey) : false; 500 } 501 } 502 503 @Override 504 public Bundle getUserRestrictions(int userId) { 505 // checkManageUsersPermission("getUserRestrictions"); 506 507 synchronized (mPackagesLock) { 508 Bundle restrictions = mUserRestrictions.get(userId); 509 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 510 } 511 } 512 513 @Override 514 public void setUserRestrictions(Bundle restrictions, int userId) { 515 checkManageUsersPermission("setUserRestrictions"); 516 if (restrictions == null) return; 517 518 synchronized (mPackagesLock) { 519 mUserRestrictions.get(userId).clear(); 520 mUserRestrictions.get(userId).putAll(restrictions); 521 long token = Binder.clearCallingIdentity(); 522 try { 523 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 524 } catch (RemoteException e) { 525 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 526 } finally { 527 Binder.restoreCallingIdentity(token); 528 } 529 writeUserLocked(mUsers.get(userId)); 530 } 531 } 532 533 /** 534 * Check if we've hit the limit of how many users can be created. 535 */ 536 private boolean isUserLimitReachedLocked() { 537 int aliveUserCount = 0; 538 final int totalUserCount = mUsers.size(); 539 // Skip over users being removed 540 for (int i = 0; i < totalUserCount; i++) { 541 UserInfo user = mUsers.valueAt(i); 542 if (!mRemovingUserIds.get(user.id) 543 && !user.isGuest() && !user.partial) { 544 aliveUserCount++; 545 } 546 } 547 return aliveUserCount >= UserManager.getMaxSupportedUsers(); 548 } 549 550 /** 551 * Enforces that only the system UID or root's UID or apps that have the 552 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 553 * permission can make certain calls to the UserManager. 554 * 555 * @param message used as message if SecurityException is thrown 556 * @throws SecurityException if the caller is not system or root 557 */ 558 private static final void checkManageUsersPermission(String message) { 559 final int uid = Binder.getCallingUid(); 560 if (uid != Process.SYSTEM_UID && uid != 0 561 && ActivityManager.checkComponentPermission( 562 android.Manifest.permission.MANAGE_USERS, 563 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 564 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 565 } 566 } 567 568 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 569 try { 570 File dir = new File(mUsersDir, Integer.toString(info.id)); 571 File file = new File(dir, USER_PHOTO_FILENAME); 572 if (!dir.exists()) { 573 dir.mkdir(); 574 FileUtils.setPermissions( 575 dir.getPath(), 576 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 577 -1, -1); 578 } 579 FileOutputStream os; 580 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 581 info.iconPath = file.getAbsolutePath(); 582 } 583 try { 584 os.close(); 585 } catch (IOException ioe) { 586 // What the ... ! 587 } 588 } catch (FileNotFoundException e) { 589 Slog.w(LOG_TAG, "Error setting photo for user ", e); 590 } 591 } 592 593 /** 594 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 595 * cache it elsewhere. 596 * @return the array of user ids. 597 */ 598 public int[] getUserIds() { 599 synchronized (mPackagesLock) { 600 return mUserIds; 601 } 602 } 603 604 int[] getUserIdsLPr() { 605 return mUserIds; 606 } 607 608 private void readUserListLocked() { 609 if (!mUserListFile.exists()) { 610 fallbackToSingleUserLocked(); 611 return; 612 } 613 FileInputStream fis = null; 614 AtomicFile userListFile = new AtomicFile(mUserListFile); 615 try { 616 fis = userListFile.openRead(); 617 XmlPullParser parser = Xml.newPullParser(); 618 parser.setInput(fis, null); 619 int type; 620 while ((type = parser.next()) != XmlPullParser.START_TAG 621 && type != XmlPullParser.END_DOCUMENT) { 622 ; 623 } 624 625 if (type != XmlPullParser.START_TAG) { 626 Slog.e(LOG_TAG, "Unable to read user list"); 627 fallbackToSingleUserLocked(); 628 return; 629 } 630 631 mNextSerialNumber = -1; 632 if (parser.getName().equals(TAG_USERS)) { 633 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 634 if (lastSerialNumber != null) { 635 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 636 } 637 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 638 if (versionNumber != null) { 639 mUserVersion = Integer.parseInt(versionNumber); 640 } 641 } 642 643 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 644 if (type == XmlPullParser.START_TAG) { 645 final String name = parser.getName(); 646 if (name.equals(TAG_USER)) { 647 String id = parser.getAttributeValue(null, ATTR_ID); 648 UserInfo user = readUserLocked(Integer.parseInt(id)); 649 650 if (user != null) { 651 mUsers.put(user.id, user); 652 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 653 mNextSerialNumber = user.id + 1; 654 } 655 } 656 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 657 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 658 && type != XmlPullParser.END_TAG) { 659 if (type == XmlPullParser.START_TAG) { 660 if (parser.getName().equals(TAG_RESTRICTIONS)) { 661 readRestrictionsLocked(parser, mGuestRestrictions); 662 } 663 break; 664 } 665 } 666 } 667 } 668 } 669 updateUserIdsLocked(); 670 upgradeIfNecessaryLocked(); 671 } catch (IOException ioe) { 672 fallbackToSingleUserLocked(); 673 } catch (XmlPullParserException pe) { 674 fallbackToSingleUserLocked(); 675 } finally { 676 if (fis != null) { 677 try { 678 fis.close(); 679 } catch (IOException e) { 680 } 681 } 682 } 683 } 684 685 /** 686 * Upgrade steps between versions, either for fixing bugs or changing the data format. 687 */ 688 private void upgradeIfNecessaryLocked() { 689 int userVersion = mUserVersion; 690 if (userVersion < 1) { 691 // Assign a proper name for the owner, if not initialized correctly before 692 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 693 if ("Primary".equals(user.name)) { 694 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 695 writeUserLocked(user); 696 } 697 userVersion = 1; 698 } 699 700 if (userVersion < 2) { 701 // Owner should be marked as initialized 702 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 703 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 704 user.flags |= UserInfo.FLAG_INITIALIZED; 705 writeUserLocked(user); 706 } 707 userVersion = 2; 708 } 709 710 711 if (userVersion < 4) { 712 userVersion = 4; 713 } 714 715 if (userVersion < 5) { 716 initDefaultGuestRestrictions(); 717 userVersion = 5; 718 } 719 720 if (userVersion < USER_VERSION) { 721 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 722 + USER_VERSION); 723 } else { 724 mUserVersion = userVersion; 725 writeUserListLocked(); 726 } 727 } 728 729 private void fallbackToSingleUserLocked() { 730 // Create the primary user 731 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 732 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 733 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 734 mUsers.put(0, primary); 735 mNextSerialNumber = MIN_USER_ID; 736 mUserVersion = USER_VERSION; 737 738 Bundle restrictions = new Bundle(); 739 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 740 741 updateUserIdsLocked(); 742 initDefaultGuestRestrictions(); 743 744 writeUserListLocked(); 745 writeUserLocked(primary); 746 } 747 748 /* 749 * Writes the user file in this format: 750 * 751 * <user flags="20039023" id="0"> 752 * <name>Primary</name> 753 * </user> 754 */ 755 private void writeUserLocked(UserInfo userInfo) { 756 FileOutputStream fos = null; 757 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 758 try { 759 fos = userFile.startWrite(); 760 final BufferedOutputStream bos = new BufferedOutputStream(fos); 761 762 // XmlSerializer serializer = XmlUtils.serializerInstance(); 763 final XmlSerializer serializer = new FastXmlSerializer(); 764 serializer.setOutput(bos, "utf-8"); 765 serializer.startDocument(null, true); 766 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 767 768 serializer.startTag(null, TAG_USER); 769 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 770 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 771 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 772 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 773 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 774 Long.toString(userInfo.lastLoggedInTime)); 775 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 776 if (pinState != null) { 777 if (pinState.salt != 0) { 778 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 779 } 780 if (pinState.pinHash != null) { 781 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 782 } 783 if (pinState.failedAttempts != 0) { 784 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 785 Integer.toString(pinState.failedAttempts)); 786 serializer.attribute(null, ATTR_LAST_RETRY_MS, 787 Long.toString(pinState.lastAttemptTime)); 788 } 789 } 790 if (userInfo.iconPath != null) { 791 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 792 } 793 if (userInfo.partial) { 794 serializer.attribute(null, ATTR_PARTIAL, "true"); 795 } 796 if (userInfo.guestToRemove) { 797 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 798 } 799 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 800 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 801 Integer.toString(userInfo.profileGroupId)); 802 } 803 804 serializer.startTag(null, TAG_NAME); 805 serializer.text(userInfo.name); 806 serializer.endTag(null, TAG_NAME); 807 Bundle restrictions = mUserRestrictions.get(userInfo.id); 808 if (restrictions != null) { 809 writeRestrictionsLocked(serializer, restrictions); 810 } 811 serializer.endTag(null, TAG_USER); 812 813 serializer.endDocument(); 814 userFile.finishWrite(fos); 815 } catch (Exception ioe) { 816 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 817 userFile.failWrite(fos); 818 } 819 } 820 821 /* 822 * Writes the user list file in this format: 823 * 824 * <users nextSerialNumber="3"> 825 * <user id="0"></user> 826 * <user id="2"></user> 827 * </users> 828 */ 829 private void writeUserListLocked() { 830 FileOutputStream fos = null; 831 AtomicFile userListFile = new AtomicFile(mUserListFile); 832 try { 833 fos = userListFile.startWrite(); 834 final BufferedOutputStream bos = new BufferedOutputStream(fos); 835 836 // XmlSerializer serializer = XmlUtils.serializerInstance(); 837 final XmlSerializer serializer = new FastXmlSerializer(); 838 serializer.setOutput(bos, "utf-8"); 839 serializer.startDocument(null, true); 840 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 841 842 serializer.startTag(null, TAG_USERS); 843 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 844 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 845 846 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 847 writeRestrictionsLocked(serializer, mGuestRestrictions); 848 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 849 for (int i = 0; i < mUsers.size(); i++) { 850 UserInfo user = mUsers.valueAt(i); 851 serializer.startTag(null, TAG_USER); 852 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 853 serializer.endTag(null, TAG_USER); 854 } 855 856 serializer.endTag(null, TAG_USERS); 857 858 serializer.endDocument(); 859 userListFile.finishWrite(fos); 860 } catch (Exception e) { 861 userListFile.failWrite(fos); 862 Slog.e(LOG_TAG, "Error writing user list"); 863 } 864 } 865 866 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 867 throws IOException { 868 serializer.startTag(null, TAG_RESTRICTIONS); 869 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 870 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 871 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 872 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 873 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 874 writeBoolean(serializer, restrictions, 875 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 876 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 877 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 878 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 879 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 880 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 881 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 882 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 883 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 884 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 885 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 886 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 887 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 888 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 889 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 890 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 891 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 892 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 893 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 894 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 895 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 896 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 897 serializer.endTag(null, TAG_RESTRICTIONS); 898 } 899 900 private UserInfo readUserLocked(int id) { 901 int flags = 0; 902 int serialNumber = id; 903 String name = null; 904 String iconPath = null; 905 long creationTime = 0L; 906 long lastLoggedInTime = 0L; 907 long salt = 0L; 908 String pinHash = null; 909 int failedAttempts = 0; 910 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 911 long lastAttemptTime = 0L; 912 boolean partial = false; 913 boolean guestToRemove = false; 914 Bundle restrictions = new Bundle(); 915 916 FileInputStream fis = null; 917 try { 918 AtomicFile userFile = 919 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 920 fis = userFile.openRead(); 921 XmlPullParser parser = Xml.newPullParser(); 922 parser.setInput(fis, null); 923 int type; 924 while ((type = parser.next()) != XmlPullParser.START_TAG 925 && type != XmlPullParser.END_DOCUMENT) { 926 ; 927 } 928 929 if (type != XmlPullParser.START_TAG) { 930 Slog.e(LOG_TAG, "Unable to read user " + id); 931 return null; 932 } 933 934 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 935 int storedId = readIntAttribute(parser, ATTR_ID, -1); 936 if (storedId != id) { 937 Slog.e(LOG_TAG, "User id does not match the file name"); 938 return null; 939 } 940 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 941 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 942 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 943 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 944 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 945 salt = readLongAttribute(parser, ATTR_SALT, 0L); 946 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 947 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 948 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 949 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 950 UserInfo.NO_PROFILE_GROUP_ID); 951 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 952 // This attribute was added and renamed during development of L. 953 // TODO Remove upgrade path by 1st May 2014 954 profileGroupId = readIntAttribute(parser, "relatedGroupId", 955 UserInfo.NO_PROFILE_GROUP_ID); 956 } 957 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 958 if ("true".equals(valueString)) { 959 partial = true; 960 } 961 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 962 if ("true".equals(valueString)) { 963 guestToRemove = true; 964 } 965 966 int outerDepth = parser.getDepth(); 967 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 968 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 969 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 970 continue; 971 } 972 String tag = parser.getName(); 973 if (TAG_NAME.equals(tag)) { 974 type = parser.next(); 975 if (type == XmlPullParser.TEXT) { 976 name = parser.getText(); 977 } 978 } else if (TAG_RESTRICTIONS.equals(tag)) { 979 readRestrictionsLocked(parser, restrictions); 980 } 981 } 982 } 983 984 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 985 userInfo.serialNumber = serialNumber; 986 userInfo.creationTime = creationTime; 987 userInfo.lastLoggedInTime = lastLoggedInTime; 988 userInfo.partial = partial; 989 userInfo.guestToRemove = guestToRemove; 990 userInfo.profileGroupId = profileGroupId; 991 mUserRestrictions.append(id, restrictions); 992 if (salt != 0L) { 993 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 994 if (pinState == null) { 995 pinState = new RestrictionsPinState(); 996 mRestrictionsPinStates.put(id, pinState); 997 } 998 pinState.salt = salt; 999 pinState.pinHash = pinHash; 1000 pinState.failedAttempts = failedAttempts; 1001 pinState.lastAttemptTime = lastAttemptTime; 1002 } 1003 return userInfo; 1004 1005 } catch (IOException ioe) { 1006 } catch (XmlPullParserException pe) { 1007 } finally { 1008 if (fis != null) { 1009 try { 1010 fis.close(); 1011 } catch (IOException e) { 1012 } 1013 } 1014 } 1015 return null; 1016 } 1017 1018 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1019 throws IOException { 1020 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1021 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1022 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1023 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1024 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1025 readBoolean(parser, restrictions, 1026 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1027 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1028 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1029 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1030 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1031 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1032 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1033 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1034 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1035 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1036 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1037 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1038 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1039 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1040 readBoolean(parser, restrictions, 1041 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1042 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1043 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1044 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1045 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1046 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1047 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1048 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1049 } 1050 1051 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1052 String restrictionKey) { 1053 String value = parser.getAttributeValue(null, restrictionKey); 1054 if (value != null) { 1055 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1056 } 1057 } 1058 1059 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1060 throws IOException { 1061 if (restrictions.containsKey(restrictionKey)) { 1062 xml.attribute(null, restrictionKey, 1063 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1064 } 1065 } 1066 1067 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1068 String valueString = parser.getAttributeValue(null, attr); 1069 if (valueString == null) return defaultValue; 1070 try { 1071 return Integer.parseInt(valueString); 1072 } catch (NumberFormatException nfe) { 1073 return defaultValue; 1074 } 1075 } 1076 1077 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1078 String valueString = parser.getAttributeValue(null, attr); 1079 if (valueString == null) return defaultValue; 1080 try { 1081 return Long.parseLong(valueString); 1082 } catch (NumberFormatException nfe) { 1083 return defaultValue; 1084 } 1085 } 1086 1087 private boolean isPackageInstalled(String pkg, int userId) { 1088 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1089 PackageManager.GET_UNINSTALLED_PACKAGES, 1090 userId); 1091 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1092 return false; 1093 } 1094 return true; 1095 } 1096 1097 /** 1098 * Removes all the restrictions files (res_<packagename>) for a given user. 1099 * Does not do any permissions checking. 1100 */ 1101 private void cleanAppRestrictions(int userId) { 1102 synchronized (mPackagesLock) { 1103 File dir = Environment.getUserSystemDirectory(userId); 1104 String[] files = dir.list(); 1105 if (files == null) return; 1106 for (String fileName : files) { 1107 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1108 File resFile = new File(dir, fileName); 1109 if (resFile.exists()) { 1110 resFile.delete(); 1111 } 1112 } 1113 } 1114 } 1115 } 1116 1117 /** 1118 * Removes the app restrictions file for a specific package and user id, if it exists. 1119 */ 1120 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1121 synchronized (mPackagesLock) { 1122 File dir = Environment.getUserSystemDirectory(userId); 1123 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1124 if (resFile.exists()) { 1125 resFile.delete(); 1126 } 1127 } 1128 } 1129 1130 @Override 1131 public UserInfo createProfileForUser(String name, int flags, int userId) { 1132 checkManageUsersPermission("Only the system can create users"); 1133 if (userId != UserHandle.USER_OWNER) { 1134 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1135 return null; 1136 } 1137 return createUserInternal(name, flags, userId); 1138 } 1139 1140 @Override 1141 public UserInfo createUser(String name, int flags) { 1142 checkManageUsersPermission("Only the system can create users"); 1143 return createUserInternal(name, flags, UserHandle.USER_NULL); 1144 } 1145 1146 private UserInfo createUserInternal(String name, int flags, int parentId) { 1147 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1148 UserManager.DISALLOW_ADD_USER, false)) { 1149 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1150 return null; 1151 } 1152 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1153 final long ident = Binder.clearCallingIdentity(); 1154 UserInfo userInfo = null; 1155 try { 1156 synchronized (mInstallLock) { 1157 synchronized (mPackagesLock) { 1158 UserInfo parent = null; 1159 if (parentId != UserHandle.USER_NULL) { 1160 parent = getUserInfoLocked(parentId); 1161 if (parent == null) return null; 1162 } 1163 // If we're not adding a guest user and the limit has been reached, 1164 // cannot add a user. 1165 if (!isGuest && isUserLimitReachedLocked()) { 1166 return null; 1167 } 1168 // If we're adding a guest and there already exists one, bail. 1169 if (isGuest && findCurrentGuestUserLocked() != null) { 1170 return null; 1171 } 1172 // Limit number of managed profiles that can be created 1173 if ((flags & UserInfo.FLAG_MANAGED_PROFILE) != 0 1174 && numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 1175 >= MAX_MANAGED_PROFILES) { 1176 return null; 1177 } 1178 int userId = getNextAvailableIdLocked(); 1179 userInfo = new UserInfo(userId, name, null, flags); 1180 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1181 userInfo.serialNumber = mNextSerialNumber++; 1182 long now = System.currentTimeMillis(); 1183 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1184 userInfo.partial = true; 1185 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1186 mUsers.put(userId, userInfo); 1187 writeUserListLocked(); 1188 if (parent != null) { 1189 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1190 parent.profileGroupId = parent.id; 1191 writeUserLocked(parent); 1192 } 1193 userInfo.profileGroupId = parent.profileGroupId; 1194 } 1195 writeUserLocked(userInfo); 1196 mPm.createNewUserLILPw(userId, userPath); 1197 userInfo.partial = false; 1198 writeUserLocked(userInfo); 1199 updateUserIdsLocked(); 1200 Bundle restrictions = new Bundle(); 1201 mUserRestrictions.append(userId, restrictions); 1202 } 1203 } 1204 if (userInfo != null) { 1205 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1206 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1207 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1208 android.Manifest.permission.MANAGE_USERS); 1209 } 1210 } finally { 1211 Binder.restoreCallingIdentity(ident); 1212 } 1213 return userInfo; 1214 } 1215 1216 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1217 int count = 0; 1218 for (int i = mUsers.size() - 1; i >= 0; i--) { 1219 UserInfo user = mUsers.valueAt(i); 1220 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1221 if ((user.flags & flags) != 0) { 1222 count++; 1223 } 1224 } 1225 } 1226 return count; 1227 } 1228 1229 /** 1230 * Find the current guest user. If the Guest user is partial, 1231 * then do not include it in the results as it is about to die. 1232 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1233 * the special handling of Guests being removed. 1234 */ 1235 private UserInfo findCurrentGuestUserLocked() { 1236 final int size = mUsers.size(); 1237 for (int i = 0; i < size; i++) { 1238 final UserInfo user = mUsers.valueAt(i); 1239 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1240 return user; 1241 } 1242 } 1243 return null; 1244 } 1245 1246 /** 1247 * Mark this guest user for deletion to allow us to create another guest 1248 * and switch to that user before actually removing this guest. 1249 * @param userHandle the userid of the current guest 1250 * @return whether the user could be marked for deletion 1251 */ 1252 public boolean markGuestForDeletion(int userHandle) { 1253 checkManageUsersPermission("Only the system can remove users"); 1254 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1255 UserManager.DISALLOW_REMOVE_USER, false)) { 1256 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1257 return false; 1258 } 1259 1260 long ident = Binder.clearCallingIdentity(); 1261 try { 1262 final UserInfo user; 1263 synchronized (mPackagesLock) { 1264 user = mUsers.get(userHandle); 1265 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1266 return false; 1267 } 1268 if (!user.isGuest()) { 1269 return false; 1270 } 1271 // We set this to a guest user that is to be removed. This is a temporary state 1272 // where we are allowed to add new Guest users, even if this one is still not 1273 // removed. This user will still show up in getUserInfo() calls. 1274 // If we don't get around to removing this Guest user, it will be purged on next 1275 // startup. 1276 user.guestToRemove = true; 1277 // Mark it as disabled, so that it isn't returned any more when 1278 // profiles are queried. 1279 user.flags |= UserInfo.FLAG_DISABLED; 1280 writeUserLocked(user); 1281 } 1282 } finally { 1283 Binder.restoreCallingIdentity(ident); 1284 } 1285 return true; 1286 } 1287 1288 /** 1289 * Removes a user and all data directories created for that user. This method should be called 1290 * after the user's processes have been terminated. 1291 * @param userHandle the user's id 1292 */ 1293 public boolean removeUser(int userHandle) { 1294 checkManageUsersPermission("Only the system can remove users"); 1295 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1296 UserManager.DISALLOW_REMOVE_USER, false)) { 1297 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1298 return false; 1299 } 1300 1301 long ident = Binder.clearCallingIdentity(); 1302 try { 1303 final UserInfo user; 1304 synchronized (mPackagesLock) { 1305 user = mUsers.get(userHandle); 1306 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1307 return false; 1308 } 1309 1310 // We remember deleted user IDs to prevent them from being 1311 // reused during the current boot; they can still be reused 1312 // after a reboot. 1313 mRemovingUserIds.put(userHandle, true); 1314 1315 try { 1316 mAppOpsService.removeUser(userHandle); 1317 } catch (RemoteException e) { 1318 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1319 } 1320 // Set this to a partially created user, so that the user will be purged 1321 // on next startup, in case the runtime stops now before stopping and 1322 // removing the user completely. 1323 user.partial = true; 1324 // Mark it as disabled, so that it isn't returned any more when 1325 // profiles are queried. 1326 user.flags |= UserInfo.FLAG_DISABLED; 1327 writeUserLocked(user); 1328 } 1329 1330 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1331 && user.isManagedProfile()) { 1332 // Send broadcast to notify system that the user removed was a 1333 // managed user. 1334 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1335 } 1336 1337 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1338 int res; 1339 try { 1340 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1341 new IStopUserCallback.Stub() { 1342 @Override 1343 public void userStopped(int userId) { 1344 finishRemoveUser(userId); 1345 } 1346 @Override 1347 public void userStopAborted(int userId) { 1348 } 1349 }); 1350 } catch (RemoteException e) { 1351 return false; 1352 } 1353 return res == ActivityManager.USER_OP_SUCCESS; 1354 } finally { 1355 Binder.restoreCallingIdentity(ident); 1356 } 1357 } 1358 1359 void finishRemoveUser(final int userHandle) { 1360 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1361 // Let other services shutdown any activity and clean up their state before completely 1362 // wiping the user's system directory and removing from the user list 1363 long ident = Binder.clearCallingIdentity(); 1364 try { 1365 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1366 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1367 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1368 android.Manifest.permission.MANAGE_USERS, 1369 1370 new BroadcastReceiver() { 1371 @Override 1372 public void onReceive(Context context, Intent intent) { 1373 if (DBG) { 1374 Slog.i(LOG_TAG, 1375 "USER_REMOVED broadcast sent, cleaning up user data " 1376 + userHandle); 1377 } 1378 new Thread() { 1379 public void run() { 1380 synchronized (mInstallLock) { 1381 synchronized (mPackagesLock) { 1382 removeUserStateLocked(userHandle); 1383 } 1384 } 1385 } 1386 }.start(); 1387 } 1388 }, 1389 1390 null, Activity.RESULT_OK, null, null); 1391 } finally { 1392 Binder.restoreCallingIdentity(ident); 1393 } 1394 } 1395 1396 private void removeUserStateLocked(final int userHandle) { 1397 // Cleanup package manager settings 1398 mPm.cleanUpUserLILPw(this, userHandle); 1399 1400 // Remove this user from the list 1401 mUsers.remove(userHandle); 1402 1403 mRestrictionsPinStates.remove(userHandle); 1404 // Remove user file 1405 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1406 userFile.delete(); 1407 // Update the user list 1408 writeUserListLocked(); 1409 updateUserIdsLocked(); 1410 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1411 } 1412 1413 private void removeDirectoryRecursive(File parent) { 1414 if (parent.isDirectory()) { 1415 String[] files = parent.list(); 1416 for (String filename : files) { 1417 File child = new File(parent, filename); 1418 removeDirectoryRecursive(child); 1419 } 1420 } 1421 parent.delete(); 1422 } 1423 1424 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1425 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1426 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1427 Intent.FLAG_RECEIVER_FOREGROUND); 1428 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1429 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1430 } 1431 1432 @Override 1433 public Bundle getApplicationRestrictions(String packageName) { 1434 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1435 } 1436 1437 @Override 1438 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1439 if (UserHandle.getCallingUserId() != userId 1440 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1441 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1442 } 1443 synchronized (mPackagesLock) { 1444 // Read the restrictions from XML 1445 return readApplicationRestrictionsLocked(packageName, userId); 1446 } 1447 } 1448 1449 @Override 1450 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1451 int userId) { 1452 if (UserHandle.getCallingUserId() != userId 1453 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1454 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1455 } 1456 synchronized (mPackagesLock) { 1457 if (restrictions == null || restrictions.isEmpty()) { 1458 cleanAppRestrictionsForPackage(packageName, userId); 1459 } else { 1460 // Write the restrictions to XML 1461 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1462 } 1463 } 1464 1465 if (isPackageInstalled(packageName, userId)) { 1466 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1467 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1468 changeIntent.setPackage(packageName); 1469 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1470 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1471 } 1472 } 1473 1474 @Override 1475 public boolean setRestrictionsChallenge(String newPin) { 1476 checkManageUsersPermission("Only system can modify the restrictions pin"); 1477 int userId = UserHandle.getCallingUserId(); 1478 synchronized (mPackagesLock) { 1479 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1480 if (pinState == null) { 1481 pinState = new RestrictionsPinState(); 1482 } 1483 if (newPin == null) { 1484 pinState.salt = 0; 1485 pinState.pinHash = null; 1486 } else { 1487 try { 1488 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1489 } catch (NoSuchAlgorithmException e) { 1490 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1491 } 1492 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1493 pinState.failedAttempts = 0; 1494 } 1495 mRestrictionsPinStates.put(userId, pinState); 1496 writeUserLocked(mUsers.get(userId)); 1497 } 1498 return true; 1499 } 1500 1501 @Override 1502 public int checkRestrictionsChallenge(String pin) { 1503 checkManageUsersPermission("Only system can verify the restrictions pin"); 1504 int userId = UserHandle.getCallingUserId(); 1505 synchronized (mPackagesLock) { 1506 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1507 // If there's no pin set, return error code 1508 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1509 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1510 } else if (pin == null) { 1511 // If just checking if user can be prompted, return remaining time 1512 int waitTime = getRemainingTimeForPinAttempt(pinState); 1513 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1514 return waitTime; 1515 } else { 1516 int waitTime = getRemainingTimeForPinAttempt(pinState); 1517 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1518 if (waitTime > 0) { 1519 return waitTime; 1520 } 1521 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1522 pinState.failedAttempts = 0; 1523 writeUserLocked(mUsers.get(userId)); 1524 return UserManager.PIN_VERIFICATION_SUCCESS; 1525 } else { 1526 pinState.failedAttempts++; 1527 pinState.lastAttemptTime = System.currentTimeMillis(); 1528 writeUserLocked(mUsers.get(userId)); 1529 return waitTime; 1530 } 1531 } 1532 } 1533 } 1534 1535 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1536 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1537 BACKOFF_TIMES.length - 1); 1538 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1539 BACKOFF_TIMES[backoffIndex] : 0; 1540 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1541 0); 1542 } 1543 1544 @Override 1545 public boolean hasRestrictionsChallenge() { 1546 int userId = UserHandle.getCallingUserId(); 1547 synchronized (mPackagesLock) { 1548 return hasRestrictionsPinLocked(userId); 1549 } 1550 } 1551 1552 private boolean hasRestrictionsPinLocked(int userId) { 1553 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1554 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1555 return false; 1556 } 1557 return true; 1558 } 1559 1560 @Override 1561 public void removeRestrictions() { 1562 checkManageUsersPermission("Only system can remove restrictions"); 1563 final int userHandle = UserHandle.getCallingUserId(); 1564 removeRestrictionsForUser(userHandle, true); 1565 } 1566 1567 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1568 synchronized (mPackagesLock) { 1569 // Remove all user restrictions 1570 setUserRestrictions(new Bundle(), userHandle); 1571 // Remove restrictions pin 1572 setRestrictionsChallenge(null); 1573 // Remove any app restrictions 1574 cleanAppRestrictions(userHandle); 1575 } 1576 if (unhideApps) { 1577 unhideAllInstalledAppsForUser(userHandle); 1578 } 1579 } 1580 1581 private void unhideAllInstalledAppsForUser(final int userHandle) { 1582 mHandler.post(new Runnable() { 1583 @Override 1584 public void run() { 1585 List<ApplicationInfo> apps = 1586 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1587 userHandle).getList(); 1588 final long ident = Binder.clearCallingIdentity(); 1589 try { 1590 for (ApplicationInfo appInfo : apps) { 1591 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1592 && (appInfo.flags & ApplicationInfo.FLAG_HIDDEN) != 0) { 1593 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1594 userHandle); 1595 } 1596 } 1597 } finally { 1598 Binder.restoreCallingIdentity(ident); 1599 } 1600 } 1601 }); 1602 } 1603 1604 /* 1605 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1606 * Not the most secure, but it is at least a second level of protection. First level is that 1607 * the file is in a location only readable by the system process. 1608 * @param password the password. 1609 * @param salt the randomly generated salt 1610 * @return the hash of the pattern in a String. 1611 */ 1612 private String passwordToHash(String password, long salt) { 1613 if (password == null) { 1614 return null; 1615 } 1616 String algo = null; 1617 String hashed = salt + password; 1618 try { 1619 byte[] saltedPassword = (password + salt).getBytes(); 1620 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1621 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1622 hashed = toHex(sha1) + toHex(md5); 1623 } catch (NoSuchAlgorithmException e) { 1624 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1625 } 1626 return hashed; 1627 } 1628 1629 private static String toHex(byte[] ary) { 1630 final String hex = "0123456789ABCDEF"; 1631 String ret = ""; 1632 for (int i = 0; i < ary.length; i++) { 1633 ret += hex.charAt((ary[i] >> 4) & 0xf); 1634 ret += hex.charAt(ary[i] & 0xf); 1635 } 1636 return ret; 1637 } 1638 1639 private int getUidForPackage(String packageName) { 1640 long ident = Binder.clearCallingIdentity(); 1641 try { 1642 return mContext.getPackageManager().getApplicationInfo(packageName, 1643 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1644 } catch (NameNotFoundException nnfe) { 1645 return -1; 1646 } finally { 1647 Binder.restoreCallingIdentity(ident); 1648 } 1649 } 1650 1651 private Bundle readApplicationRestrictionsLocked(String packageName, 1652 int userId) { 1653 final Bundle restrictions = new Bundle(); 1654 final ArrayList<String> values = new ArrayList<String>(); 1655 1656 FileInputStream fis = null; 1657 try { 1658 AtomicFile restrictionsFile = 1659 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1660 packageToRestrictionsFileName(packageName))); 1661 fis = restrictionsFile.openRead(); 1662 XmlPullParser parser = Xml.newPullParser(); 1663 parser.setInput(fis, null); 1664 int type; 1665 while ((type = parser.next()) != XmlPullParser.START_TAG 1666 && type != XmlPullParser.END_DOCUMENT) { 1667 ; 1668 } 1669 1670 if (type != XmlPullParser.START_TAG) { 1671 Slog.e(LOG_TAG, "Unable to read restrictions file " 1672 + restrictionsFile.getBaseFile()); 1673 return restrictions; 1674 } 1675 1676 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1677 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1678 String key = parser.getAttributeValue(null, ATTR_KEY); 1679 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1680 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1681 if (multiple != null) { 1682 values.clear(); 1683 int count = Integer.parseInt(multiple); 1684 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1685 if (type == XmlPullParser.START_TAG 1686 && parser.getName().equals(TAG_VALUE)) { 1687 values.add(parser.nextText().trim()); 1688 count--; 1689 } 1690 } 1691 String [] valueStrings = new String[values.size()]; 1692 values.toArray(valueStrings); 1693 restrictions.putStringArray(key, valueStrings); 1694 } else { 1695 String value = parser.nextText().trim(); 1696 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1697 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1698 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1699 restrictions.putInt(key, Integer.parseInt(value)); 1700 } else { 1701 restrictions.putString(key, value); 1702 } 1703 } 1704 } 1705 } 1706 } catch (IOException ioe) { 1707 } catch (XmlPullParserException pe) { 1708 } finally { 1709 if (fis != null) { 1710 try { 1711 fis.close(); 1712 } catch (IOException e) { 1713 } 1714 } 1715 } 1716 return restrictions; 1717 } 1718 1719 private void writeApplicationRestrictionsLocked(String packageName, 1720 Bundle restrictions, int userId) { 1721 FileOutputStream fos = null; 1722 AtomicFile restrictionsFile = new AtomicFile( 1723 new File(Environment.getUserSystemDirectory(userId), 1724 packageToRestrictionsFileName(packageName))); 1725 try { 1726 fos = restrictionsFile.startWrite(); 1727 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1728 1729 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1730 final XmlSerializer serializer = new FastXmlSerializer(); 1731 serializer.setOutput(bos, "utf-8"); 1732 serializer.startDocument(null, true); 1733 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1734 1735 serializer.startTag(null, TAG_RESTRICTIONS); 1736 1737 for (String key : restrictions.keySet()) { 1738 Object value = restrictions.get(key); 1739 serializer.startTag(null, TAG_ENTRY); 1740 serializer.attribute(null, ATTR_KEY, key); 1741 1742 if (value instanceof Boolean) { 1743 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1744 serializer.text(value.toString()); 1745 } else if (value instanceof Integer) { 1746 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1747 serializer.text(value.toString()); 1748 } else if (value == null || value instanceof String) { 1749 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1750 serializer.text(value != null ? (String) value : ""); 1751 } else { 1752 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1753 String[] values = (String[]) value; 1754 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1755 for (String choice : values) { 1756 serializer.startTag(null, TAG_VALUE); 1757 serializer.text(choice != null ? choice : ""); 1758 serializer.endTag(null, TAG_VALUE); 1759 } 1760 } 1761 serializer.endTag(null, TAG_ENTRY); 1762 } 1763 1764 serializer.endTag(null, TAG_RESTRICTIONS); 1765 1766 serializer.endDocument(); 1767 restrictionsFile.finishWrite(fos); 1768 } catch (Exception e) { 1769 restrictionsFile.failWrite(fos); 1770 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1771 } 1772 } 1773 1774 @Override 1775 public int getUserSerialNumber(int userHandle) { 1776 synchronized (mPackagesLock) { 1777 if (!exists(userHandle)) return -1; 1778 return getUserInfoLocked(userHandle).serialNumber; 1779 } 1780 } 1781 1782 @Override 1783 public int getUserHandle(int userSerialNumber) { 1784 synchronized (mPackagesLock) { 1785 for (int userId : mUserIds) { 1786 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1787 } 1788 // Not found 1789 return -1; 1790 } 1791 } 1792 1793 /** 1794 * Caches the list of user ids in an array, adjusting the array size when necessary. 1795 */ 1796 private void updateUserIdsLocked() { 1797 int num = 0; 1798 for (int i = 0; i < mUsers.size(); i++) { 1799 if (!mUsers.valueAt(i).partial) { 1800 num++; 1801 } 1802 } 1803 final int[] newUsers = new int[num]; 1804 int n = 0; 1805 for (int i = 0; i < mUsers.size(); i++) { 1806 if (!mUsers.valueAt(i).partial) { 1807 newUsers[n++] = mUsers.keyAt(i); 1808 } 1809 } 1810 mUserIds = newUsers; 1811 } 1812 1813 /** 1814 * Make a note of the last started time of a user and do some cleanup. 1815 * @param userId the user that was just foregrounded 1816 */ 1817 public void userForeground(int userId) { 1818 synchronized (mPackagesLock) { 1819 UserInfo user = mUsers.get(userId); 1820 long now = System.currentTimeMillis(); 1821 if (user == null || user.partial) { 1822 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1823 return; 1824 } 1825 if (now > EPOCH_PLUS_30_YEARS) { 1826 user.lastLoggedInTime = now; 1827 writeUserLocked(user); 1828 } 1829 } 1830 } 1831 1832 /** 1833 * Returns the next available user id, filling in any holes in the ids. 1834 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1835 * for data and battery stats collection, or unexpected cross-talk. 1836 * @return 1837 */ 1838 private int getNextAvailableIdLocked() { 1839 synchronized (mPackagesLock) { 1840 int i = MIN_USER_ID; 1841 while (i < Integer.MAX_VALUE) { 1842 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1843 break; 1844 } 1845 i++; 1846 } 1847 return i; 1848 } 1849 } 1850 1851 private String packageToRestrictionsFileName(String packageName) { 1852 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1853 } 1854 1855 private String restrictionsFileNameToPackage(String fileName) { 1856 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1857 (int) (fileName.length() - XML_SUFFIX.length())); 1858 } 1859 1860 @Override 1861 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1862 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1863 != PackageManager.PERMISSION_GRANTED) { 1864 pw.println("Permission Denial: can't dump UserManager from from pid=" 1865 + Binder.getCallingPid() 1866 + ", uid=" + Binder.getCallingUid() 1867 + " without permission " 1868 + android.Manifest.permission.DUMP); 1869 return; 1870 } 1871 1872 long now = System.currentTimeMillis(); 1873 StringBuilder sb = new StringBuilder(); 1874 synchronized (mPackagesLock) { 1875 pw.println("Users:"); 1876 for (int i = 0; i < mUsers.size(); i++) { 1877 UserInfo user = mUsers.valueAt(i); 1878 if (user == null) continue; 1879 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1880 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1881 if (user.partial) pw.print(" <partial>"); 1882 pw.println(); 1883 pw.print(" Created: "); 1884 if (user.creationTime == 0) { 1885 pw.println("<unknown>"); 1886 } else { 1887 sb.setLength(0); 1888 TimeUtils.formatDuration(now - user.creationTime, sb); 1889 sb.append(" ago"); 1890 pw.println(sb); 1891 } 1892 pw.print(" Last logged in: "); 1893 if (user.lastLoggedInTime == 0) { 1894 pw.println("<unknown>"); 1895 } else { 1896 sb.setLength(0); 1897 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1898 sb.append(" ago"); 1899 pw.println(sb); 1900 } 1901 } 1902 } 1903 } 1904} 1905