UserManagerService.java revision 78027f3b72ad0cad4c39c3947985526ac31a6d3e
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.pm; 18 19import android.app.Activity; 20import android.app.ActivityManager; 21import android.app.ActivityManagerNative; 22import android.app.IStopUserCallback; 23import android.content.BroadcastReceiver; 24import android.content.Context; 25import android.content.Intent; 26import android.content.pm.ApplicationInfo; 27import android.content.pm.PackageManager; 28import android.content.pm.PackageManager.NameNotFoundException; 29import android.content.pm.UserInfo; 30import android.graphics.Bitmap; 31import android.os.Binder; 32import android.os.Bundle; 33import android.os.Environment; 34import android.os.FileUtils; 35import android.os.Handler; 36import android.os.IUserManager; 37import android.os.Message; 38import android.os.ParcelFileDescriptor; 39import android.os.Process; 40import android.os.RemoteException; 41import android.os.ServiceManager; 42import android.os.UserHandle; 43import android.os.UserManager; 44import android.util.AtomicFile; 45import android.util.Log; 46import android.util.Slog; 47import android.util.SparseArray; 48import android.util.SparseBooleanArray; 49import android.util.TimeUtils; 50import android.util.Xml; 51 52import com.android.internal.app.IAppOpsService; 53import com.android.internal.util.ArrayUtils; 54import com.android.internal.util.FastXmlSerializer; 55 56import org.xmlpull.v1.XmlPullParser; 57import org.xmlpull.v1.XmlPullParserException; 58import org.xmlpull.v1.XmlSerializer; 59 60import java.io.BufferedOutputStream; 61import java.io.File; 62import java.io.FileDescriptor; 63import java.io.FileInputStream; 64import java.io.FileNotFoundException; 65import java.io.FileOutputStream; 66import java.io.IOException; 67import java.io.PrintWriter; 68import java.security.MessageDigest; 69import java.security.NoSuchAlgorithmException; 70import java.security.SecureRandom; 71import java.util.ArrayList; 72import java.util.List; 73 74public class UserManagerService extends IUserManager.Stub { 75 76 private static final String LOG_TAG = "UserManagerService"; 77 78 private static final boolean DBG = false; 79 80 private static final String TAG_NAME = "name"; 81 private static final String ATTR_FLAGS = "flags"; 82 private static final String ATTR_ICON_PATH = "icon"; 83 private static final String ATTR_ID = "id"; 84 private static final String ATTR_CREATION_TIME = "created"; 85 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 86 private static final String ATTR_SALT = "salt"; 87 private static final String ATTR_PIN_HASH = "pinHash"; 88 private static final String ATTR_FAILED_ATTEMPTS = "failedAttempts"; 89 private static final String ATTR_LAST_RETRY_MS = "lastAttemptMs"; 90 private static final String ATTR_SERIAL_NO = "serialNumber"; 91 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 92 private static final String ATTR_PARTIAL = "partial"; 93 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 94 private static final String ATTR_USER_VERSION = "version"; 95 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 96 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 97 private static final String TAG_USERS = "users"; 98 private static final String TAG_USER = "user"; 99 private static final String TAG_RESTRICTIONS = "restrictions"; 100 private static final String TAG_ENTRY = "entry"; 101 private static final String TAG_VALUE = "value"; 102 private static final String ATTR_KEY = "key"; 103 private static final String ATTR_VALUE_TYPE = "type"; 104 private static final String ATTR_MULTIPLE = "m"; 105 106 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 107 private static final String ATTR_TYPE_STRING = "s"; 108 private static final String ATTR_TYPE_BOOLEAN = "b"; 109 private static final String ATTR_TYPE_INTEGER = "i"; 110 111 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 112 private static final String USER_LIST_FILENAME = "userlist.xml"; 113 private static final String USER_PHOTO_FILENAME = "photo.png"; 114 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 115 116 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 117 private static final String XML_SUFFIX = ".xml"; 118 119 private static final int MIN_USER_ID = 10; 120 121 private static final int USER_VERSION = 5; 122 123 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 124 125 // Number of attempts before jumping to the next BACKOFF_TIMES slot 126 private static final int BACKOFF_INC_INTERVAL = 5; 127 128 // Maximum number of managed profiles permitted is 1. This cannot be increased 129 // without first making sure that the rest of the framework is prepared for it. 130 private static final int MAX_MANAGED_PROFILES = 1; 131 132 // Amount of time to force the user to wait before entering the PIN again, after failing 133 // BACKOFF_INC_INTERVAL times. 134 private static final int[] BACKOFF_TIMES = { 0, 30*1000, 60*1000, 5*60*1000, 30*60*1000 }; 135 136 static final int WRITE_USER_MSG = 1; 137 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 138 139 private final Context mContext; 140 private final PackageManagerService mPm; 141 private final Object mInstallLock; 142 private final Object mPackagesLock; 143 144 private final Handler mHandler; 145 146 private final File mUsersDir; 147 private final File mUserListFile; 148 private final File mBaseUserPath; 149 150 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 151 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 152 private final Bundle mGuestRestrictions = new Bundle(); 153 154 class RestrictionsPinState { 155 long salt; 156 String pinHash; 157 int failedAttempts; 158 long lastAttemptTime; 159 } 160 161 private final SparseArray<RestrictionsPinState> mRestrictionsPinStates = 162 new SparseArray<RestrictionsPinState>(); 163 164 /** 165 * Set of user IDs being actively removed. Removed IDs linger in this set 166 * for several seconds to work around a VFS caching issue. 167 */ 168 // @GuardedBy("mPackagesLock") 169 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 170 171 private int[] mUserIds; 172 private int mNextSerialNumber; 173 private int mUserVersion = 0; 174 175 private IAppOpsService mAppOpsService; 176 177 private static UserManagerService sInstance; 178 179 public static UserManagerService getInstance() { 180 synchronized (UserManagerService.class) { 181 return sInstance; 182 } 183 } 184 185 /** 186 * Available for testing purposes. 187 */ 188 UserManagerService(File dataDir, File baseUserPath) { 189 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 190 } 191 192 /** 193 * Called by package manager to create the service. This is closely 194 * associated with the package manager, and the given lock is the 195 * package manager's own lock. 196 */ 197 UserManagerService(Context context, PackageManagerService pm, 198 Object installLock, Object packagesLock) { 199 this(context, pm, installLock, packagesLock, 200 Environment.getDataDirectory(), 201 new File(Environment.getDataDirectory(), "user")); 202 } 203 204 /** 205 * Available for testing purposes. 206 */ 207 private UserManagerService(Context context, PackageManagerService pm, 208 Object installLock, Object packagesLock, 209 File dataDir, File baseUserPath) { 210 mContext = context; 211 mPm = pm; 212 mInstallLock = installLock; 213 mPackagesLock = packagesLock; 214 mHandler = new MainHandler(); 215 synchronized (mInstallLock) { 216 synchronized (mPackagesLock) { 217 mUsersDir = new File(dataDir, USER_INFO_DIR); 218 mUsersDir.mkdirs(); 219 // Make zeroth user directory, for services to migrate their files to that location 220 File userZeroDir = new File(mUsersDir, "0"); 221 userZeroDir.mkdirs(); 222 mBaseUserPath = baseUserPath; 223 FileUtils.setPermissions(mUsersDir.toString(), 224 FileUtils.S_IRWXU|FileUtils.S_IRWXG 225 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 226 -1, -1); 227 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 228 initDefaultGuestRestrictions(); 229 readUserListLocked(); 230 // Prune out any partially created/partially removed users. 231 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 232 for (int i = 0; i < mUsers.size(); i++) { 233 UserInfo ui = mUsers.valueAt(i); 234 if ((ui.partial || ui.guestToRemove) && i != 0) { 235 partials.add(ui); 236 } 237 } 238 for (int i = 0; i < partials.size(); i++) { 239 UserInfo ui = partials.get(i); 240 Slog.w(LOG_TAG, "Removing partially created user #" + i 241 + " (name=" + ui.name + ")"); 242 removeUserStateLocked(ui.id); 243 } 244 sInstance = this; 245 } 246 } 247 } 248 249 void systemReady() { 250 userForeground(UserHandle.USER_OWNER); 251 mAppOpsService = IAppOpsService.Stub.asInterface( 252 ServiceManager.getService(Context.APP_OPS_SERVICE)); 253 for (int i = 0; i < mUserIds.length; ++i) { 254 try { 255 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 256 } catch (RemoteException e) { 257 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 258 } 259 } 260 } 261 262 @Override 263 public List<UserInfo> getUsers(boolean excludeDying) { 264 checkManageUsersPermission("query users"); 265 synchronized (mPackagesLock) { 266 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 267 for (int i = 0; i < mUsers.size(); i++) { 268 UserInfo ui = mUsers.valueAt(i); 269 if (ui.partial) { 270 continue; 271 } 272 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 273 users.add(ui); 274 } 275 } 276 return users; 277 } 278 } 279 280 @Override 281 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 282 if (userId != UserHandle.getCallingUserId()) { 283 checkManageUsersPermission("getting profiles related to user " + userId); 284 } 285 final long ident = Binder.clearCallingIdentity(); 286 try { 287 synchronized (mPackagesLock) { 288 return getProfilesLocked(userId, enabledOnly); 289 } 290 } finally { 291 Binder.restoreCallingIdentity(ident); 292 } 293 } 294 295 /** Assume permissions already checked and caller's identity cleared */ 296 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 297 UserInfo user = getUserInfoLocked(userId); 298 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 299 if (user == null) { 300 // Probably a dying user 301 return users; 302 } 303 for (int i = 0; i < mUsers.size(); i++) { 304 UserInfo profile = mUsers.valueAt(i); 305 if (!isProfileOf(user, profile)) { 306 continue; 307 } 308 if (enabledOnly && !profile.isEnabled()) { 309 continue; 310 } 311 if (mRemovingUserIds.get(profile.id)) { 312 continue; 313 } 314 users.add(profile); 315 } 316 return users; 317 } 318 319 @Override 320 public UserInfo getProfileParent(int userHandle) { 321 checkManageUsersPermission("get the profile parent"); 322 synchronized (mPackagesLock) { 323 UserInfo profile = getUserInfoLocked(userHandle); 324 if (profile == null) { 325 return null; 326 } 327 int parentUserId = profile.profileGroupId; 328 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 329 return null; 330 } else { 331 return getUserInfoLocked(parentUserId); 332 } 333 } 334 } 335 336 private boolean isProfileOf(UserInfo user, UserInfo profile) { 337 return user.id == profile.id || 338 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 339 && user.profileGroupId == profile.profileGroupId); 340 } 341 342 @Override 343 public void setUserEnabled(int userId) { 344 checkManageUsersPermission("enable user"); 345 synchronized (mPackagesLock) { 346 UserInfo info = getUserInfoLocked(userId); 347 if (info != null && !info.isEnabled()) { 348 info.flags ^= UserInfo.FLAG_DISABLED; 349 writeUserLocked(info); 350 } 351 } 352 } 353 354 @Override 355 public UserInfo getUserInfo(int userId) { 356 checkManageUsersPermission("query user"); 357 synchronized (mPackagesLock) { 358 return getUserInfoLocked(userId); 359 } 360 } 361 362 @Override 363 public boolean isRestricted() { 364 synchronized (mPackagesLock) { 365 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 366 } 367 } 368 369 /* 370 * Should be locked on mUsers before calling this. 371 */ 372 private UserInfo getUserInfoLocked(int userId) { 373 UserInfo ui = mUsers.get(userId); 374 // If it is partial and not in the process of being removed, return as unknown user. 375 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 376 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 377 return null; 378 } 379 return ui; 380 } 381 382 public boolean exists(int userId) { 383 synchronized (mPackagesLock) { 384 return ArrayUtils.contains(mUserIds, userId); 385 } 386 } 387 388 @Override 389 public void setUserName(int userId, String name) { 390 checkManageUsersPermission("rename users"); 391 boolean changed = false; 392 synchronized (mPackagesLock) { 393 UserInfo info = mUsers.get(userId); 394 if (info == null || info.partial) { 395 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 396 return; 397 } 398 if (name != null && !name.equals(info.name)) { 399 info.name = name; 400 writeUserLocked(info); 401 changed = true; 402 } 403 } 404 if (changed) { 405 sendUserInfoChangedBroadcast(userId); 406 } 407 } 408 409 @Override 410 public void setUserIcon(int userId, Bitmap bitmap) { 411 checkManageUsersPermission("update users"); 412 long ident = Binder.clearCallingIdentity(); 413 try { 414 synchronized (mPackagesLock) { 415 UserInfo info = mUsers.get(userId); 416 if (info == null || info.partial) { 417 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 418 return; 419 } 420 writeBitmapLocked(info, bitmap); 421 writeUserLocked(info); 422 } 423 sendUserInfoChangedBroadcast(userId); 424 } finally { 425 Binder.restoreCallingIdentity(ident); 426 } 427 } 428 429 private void sendUserInfoChangedBroadcast(int userId) { 430 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 431 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 432 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 433 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 434 } 435 436 @Override 437 public ParcelFileDescriptor getUserIcon(int userId) { 438 String iconPath; 439 synchronized (mPackagesLock) { 440 UserInfo info = mUsers.get(userId); 441 if (info == null || info.partial) { 442 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 443 return null; 444 } 445 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 446 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 447 || callingGroupId != info.profileGroupId) { 448 checkManageUsersPermission("get the icon of a user who is not related"); 449 } 450 if (info.iconPath == null) { 451 return null; 452 } 453 iconPath = info.iconPath; 454 } 455 456 try { 457 return ParcelFileDescriptor.open( 458 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 459 } catch (FileNotFoundException e) { 460 Log.e(LOG_TAG, "Couldn't find icon file", e); 461 } 462 return null; 463 } 464 465 public void makeInitialized(int userId) { 466 checkManageUsersPermission("makeInitialized"); 467 synchronized (mPackagesLock) { 468 UserInfo info = mUsers.get(userId); 469 if (info == null || info.partial) { 470 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 471 } 472 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 473 info.flags |= UserInfo.FLAG_INITIALIZED; 474 scheduleWriteUserLocked(info); 475 } 476 } 477 } 478 479 /** 480 * If default guest restrictions haven't been initialized yet, add the basic 481 * restrictions. 482 */ 483 private void initDefaultGuestRestrictions() { 484 if (mGuestRestrictions.isEmpty()) { 485 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 486 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 487 } 488 } 489 490 @Override 491 public Bundle getDefaultGuestRestrictions() { 492 checkManageUsersPermission("getDefaultGuestRestrictions"); 493 synchronized (mPackagesLock) { 494 return new Bundle(mGuestRestrictions); 495 } 496 } 497 498 @Override 499 public void setDefaultGuestRestrictions(Bundle restrictions) { 500 checkManageUsersPermission("setDefaultGuestRestrictions"); 501 synchronized (mPackagesLock) { 502 mGuestRestrictions.clear(); 503 mGuestRestrictions.putAll(restrictions); 504 writeUserListLocked(); 505 } 506 } 507 508 @Override 509 public boolean hasUserRestriction(String restrictionKey, int userId) { 510 synchronized (mPackagesLock) { 511 Bundle restrictions = mUserRestrictions.get(userId); 512 return restrictions != null ? restrictions.getBoolean(restrictionKey) : false; 513 } 514 } 515 516 @Override 517 public Bundle getUserRestrictions(int userId) { 518 // checkManageUsersPermission("getUserRestrictions"); 519 520 synchronized (mPackagesLock) { 521 Bundle restrictions = mUserRestrictions.get(userId); 522 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 523 } 524 } 525 526 @Override 527 public void setUserRestrictions(Bundle restrictions, int userId) { 528 checkManageUsersPermission("setUserRestrictions"); 529 if (restrictions == null) return; 530 531 synchronized (mPackagesLock) { 532 mUserRestrictions.get(userId).clear(); 533 mUserRestrictions.get(userId).putAll(restrictions); 534 long token = Binder.clearCallingIdentity(); 535 try { 536 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 537 } catch (RemoteException e) { 538 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 539 } finally { 540 Binder.restoreCallingIdentity(token); 541 } 542 scheduleWriteUserLocked(mUsers.get(userId)); 543 } 544 } 545 546 /** 547 * Check if we've hit the limit of how many users can be created. 548 */ 549 private boolean isUserLimitReachedLocked() { 550 int aliveUserCount = 0; 551 final int totalUserCount = mUsers.size(); 552 // Skip over users being removed 553 for (int i = 0; i < totalUserCount; i++) { 554 UserInfo user = mUsers.valueAt(i); 555 if (!mRemovingUserIds.get(user.id) 556 && !user.isGuest() && !user.partial) { 557 aliveUserCount++; 558 } 559 } 560 return aliveUserCount >= UserManager.getMaxSupportedUsers(); 561 } 562 563 /** 564 * Enforces that only the system UID or root's UID or apps that have the 565 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 566 * permission can make certain calls to the UserManager. 567 * 568 * @param message used as message if SecurityException is thrown 569 * @throws SecurityException if the caller is not system or root 570 */ 571 private static final void checkManageUsersPermission(String message) { 572 final int uid = Binder.getCallingUid(); 573 if (uid != Process.SYSTEM_UID && uid != 0 574 && ActivityManager.checkComponentPermission( 575 android.Manifest.permission.MANAGE_USERS, 576 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 577 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 578 } 579 } 580 581 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 582 try { 583 File dir = new File(mUsersDir, Integer.toString(info.id)); 584 File file = new File(dir, USER_PHOTO_FILENAME); 585 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 586 if (!dir.exists()) { 587 dir.mkdir(); 588 FileUtils.setPermissions( 589 dir.getPath(), 590 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 591 -1, -1); 592 } 593 FileOutputStream os; 594 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 595 && tmp.renameTo(file)) { 596 info.iconPath = file.getAbsolutePath(); 597 } 598 try { 599 os.close(); 600 } catch (IOException ioe) { 601 // What the ... ! 602 } 603 tmp.delete(); 604 } catch (FileNotFoundException e) { 605 Slog.w(LOG_TAG, "Error setting photo for user ", e); 606 } 607 } 608 609 /** 610 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 611 * cache it elsewhere. 612 * @return the array of user ids. 613 */ 614 public int[] getUserIds() { 615 synchronized (mPackagesLock) { 616 return mUserIds; 617 } 618 } 619 620 int[] getUserIdsLPr() { 621 return mUserIds; 622 } 623 624 private void readUserListLocked() { 625 if (!mUserListFile.exists()) { 626 fallbackToSingleUserLocked(); 627 return; 628 } 629 FileInputStream fis = null; 630 AtomicFile userListFile = new AtomicFile(mUserListFile); 631 try { 632 fis = userListFile.openRead(); 633 XmlPullParser parser = Xml.newPullParser(); 634 parser.setInput(fis, null); 635 int type; 636 while ((type = parser.next()) != XmlPullParser.START_TAG 637 && type != XmlPullParser.END_DOCUMENT) { 638 ; 639 } 640 641 if (type != XmlPullParser.START_TAG) { 642 Slog.e(LOG_TAG, "Unable to read user list"); 643 fallbackToSingleUserLocked(); 644 return; 645 } 646 647 mNextSerialNumber = -1; 648 if (parser.getName().equals(TAG_USERS)) { 649 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 650 if (lastSerialNumber != null) { 651 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 652 } 653 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 654 if (versionNumber != null) { 655 mUserVersion = Integer.parseInt(versionNumber); 656 } 657 } 658 659 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 660 if (type == XmlPullParser.START_TAG) { 661 final String name = parser.getName(); 662 if (name.equals(TAG_USER)) { 663 String id = parser.getAttributeValue(null, ATTR_ID); 664 UserInfo user = readUserLocked(Integer.parseInt(id)); 665 666 if (user != null) { 667 mUsers.put(user.id, user); 668 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 669 mNextSerialNumber = user.id + 1; 670 } 671 } 672 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 673 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 674 && type != XmlPullParser.END_TAG) { 675 if (type == XmlPullParser.START_TAG) { 676 if (parser.getName().equals(TAG_RESTRICTIONS)) { 677 readRestrictionsLocked(parser, mGuestRestrictions); 678 } 679 break; 680 } 681 } 682 } 683 } 684 } 685 updateUserIdsLocked(); 686 upgradeIfNecessaryLocked(); 687 } catch (IOException ioe) { 688 fallbackToSingleUserLocked(); 689 } catch (XmlPullParserException pe) { 690 fallbackToSingleUserLocked(); 691 } finally { 692 if (fis != null) { 693 try { 694 fis.close(); 695 } catch (IOException e) { 696 } 697 } 698 } 699 } 700 701 /** 702 * Upgrade steps between versions, either for fixing bugs or changing the data format. 703 */ 704 private void upgradeIfNecessaryLocked() { 705 int userVersion = mUserVersion; 706 if (userVersion < 1) { 707 // Assign a proper name for the owner, if not initialized correctly before 708 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 709 if ("Primary".equals(user.name)) { 710 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 711 scheduleWriteUserLocked(user); 712 } 713 userVersion = 1; 714 } 715 716 if (userVersion < 2) { 717 // Owner should be marked as initialized 718 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 719 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 720 user.flags |= UserInfo.FLAG_INITIALIZED; 721 scheduleWriteUserLocked(user); 722 } 723 userVersion = 2; 724 } 725 726 727 if (userVersion < 4) { 728 userVersion = 4; 729 } 730 731 if (userVersion < 5) { 732 initDefaultGuestRestrictions(); 733 userVersion = 5; 734 } 735 736 if (userVersion < USER_VERSION) { 737 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 738 + USER_VERSION); 739 } else { 740 mUserVersion = userVersion; 741 writeUserListLocked(); 742 } 743 } 744 745 private void fallbackToSingleUserLocked() { 746 // Create the primary user 747 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 748 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 749 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 750 mUsers.put(0, primary); 751 mNextSerialNumber = MIN_USER_ID; 752 mUserVersion = USER_VERSION; 753 754 Bundle restrictions = new Bundle(); 755 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 756 757 updateUserIdsLocked(); 758 initDefaultGuestRestrictions(); 759 760 writeUserListLocked(); 761 writeUserLocked(primary); 762 } 763 764 private void scheduleWriteUserLocked(UserInfo userInfo) { 765 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 766 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 767 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 768 } 769 } 770 771 /* 772 * Writes the user file in this format: 773 * 774 * <user flags="20039023" id="0"> 775 * <name>Primary</name> 776 * </user> 777 */ 778 private void writeUserLocked(UserInfo userInfo) { 779 FileOutputStream fos = null; 780 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 781 try { 782 fos = userFile.startWrite(); 783 final BufferedOutputStream bos = new BufferedOutputStream(fos); 784 785 // XmlSerializer serializer = XmlUtils.serializerInstance(); 786 final XmlSerializer serializer = new FastXmlSerializer(); 787 serializer.setOutput(bos, "utf-8"); 788 serializer.startDocument(null, true); 789 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 790 791 serializer.startTag(null, TAG_USER); 792 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 793 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 794 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 795 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 796 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 797 Long.toString(userInfo.lastLoggedInTime)); 798 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 799 if (pinState != null) { 800 if (pinState.salt != 0) { 801 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 802 } 803 if (pinState.pinHash != null) { 804 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 805 } 806 if (pinState.failedAttempts != 0) { 807 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 808 Integer.toString(pinState.failedAttempts)); 809 serializer.attribute(null, ATTR_LAST_RETRY_MS, 810 Long.toString(pinState.lastAttemptTime)); 811 } 812 } 813 if (userInfo.iconPath != null) { 814 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 815 } 816 if (userInfo.partial) { 817 serializer.attribute(null, ATTR_PARTIAL, "true"); 818 } 819 if (userInfo.guestToRemove) { 820 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 821 } 822 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 823 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 824 Integer.toString(userInfo.profileGroupId)); 825 } 826 827 serializer.startTag(null, TAG_NAME); 828 serializer.text(userInfo.name); 829 serializer.endTag(null, TAG_NAME); 830 Bundle restrictions = mUserRestrictions.get(userInfo.id); 831 if (restrictions != null) { 832 writeRestrictionsLocked(serializer, restrictions); 833 } 834 serializer.endTag(null, TAG_USER); 835 836 serializer.endDocument(); 837 userFile.finishWrite(fos); 838 } catch (Exception ioe) { 839 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 840 userFile.failWrite(fos); 841 } 842 } 843 844 /* 845 * Writes the user list file in this format: 846 * 847 * <users nextSerialNumber="3"> 848 * <user id="0"></user> 849 * <user id="2"></user> 850 * </users> 851 */ 852 private void writeUserListLocked() { 853 FileOutputStream fos = null; 854 AtomicFile userListFile = new AtomicFile(mUserListFile); 855 try { 856 fos = userListFile.startWrite(); 857 final BufferedOutputStream bos = new BufferedOutputStream(fos); 858 859 // XmlSerializer serializer = XmlUtils.serializerInstance(); 860 final XmlSerializer serializer = new FastXmlSerializer(); 861 serializer.setOutput(bos, "utf-8"); 862 serializer.startDocument(null, true); 863 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 864 865 serializer.startTag(null, TAG_USERS); 866 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 867 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 868 869 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 870 writeRestrictionsLocked(serializer, mGuestRestrictions); 871 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 872 for (int i = 0; i < mUsers.size(); i++) { 873 UserInfo user = mUsers.valueAt(i); 874 serializer.startTag(null, TAG_USER); 875 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 876 serializer.endTag(null, TAG_USER); 877 } 878 879 serializer.endTag(null, TAG_USERS); 880 881 serializer.endDocument(); 882 userListFile.finishWrite(fos); 883 } catch (Exception e) { 884 userListFile.failWrite(fos); 885 Slog.e(LOG_TAG, "Error writing user list"); 886 } 887 } 888 889 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 890 throws IOException { 891 serializer.startTag(null, TAG_RESTRICTIONS); 892 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 893 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 894 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 895 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 896 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 897 writeBoolean(serializer, restrictions, 898 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 899 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 900 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 901 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 902 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 903 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 904 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 905 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 906 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 907 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 908 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 909 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 910 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 911 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 912 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 913 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 914 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 915 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 916 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 917 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 918 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 919 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 920 writeBoolean(serializer, restrictions, UserManager.DISALLOW_WALLPAPER); 921 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SAFE_BOOT); 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 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 977 if ("true".equals(valueString)) { 978 partial = true; 979 } 980 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 981 if ("true".equals(valueString)) { 982 guestToRemove = true; 983 } 984 985 int outerDepth = parser.getDepth(); 986 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 987 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 988 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 989 continue; 990 } 991 String tag = parser.getName(); 992 if (TAG_NAME.equals(tag)) { 993 type = parser.next(); 994 if (type == XmlPullParser.TEXT) { 995 name = parser.getText(); 996 } 997 } else if (TAG_RESTRICTIONS.equals(tag)) { 998 readRestrictionsLocked(parser, restrictions); 999 } 1000 } 1001 } 1002 1003 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1004 userInfo.serialNumber = serialNumber; 1005 userInfo.creationTime = creationTime; 1006 userInfo.lastLoggedInTime = lastLoggedInTime; 1007 userInfo.partial = partial; 1008 userInfo.guestToRemove = guestToRemove; 1009 userInfo.profileGroupId = profileGroupId; 1010 mUserRestrictions.append(id, restrictions); 1011 if (salt != 0L) { 1012 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 1013 if (pinState == null) { 1014 pinState = new RestrictionsPinState(); 1015 mRestrictionsPinStates.put(id, pinState); 1016 } 1017 pinState.salt = salt; 1018 pinState.pinHash = pinHash; 1019 pinState.failedAttempts = failedAttempts; 1020 pinState.lastAttemptTime = lastAttemptTime; 1021 } 1022 return userInfo; 1023 1024 } catch (IOException ioe) { 1025 } catch (XmlPullParserException pe) { 1026 } finally { 1027 if (fis != null) { 1028 try { 1029 fis.close(); 1030 } catch (IOException e) { 1031 } 1032 } 1033 } 1034 return null; 1035 } 1036 1037 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1038 throws IOException { 1039 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1040 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1041 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1042 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1043 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1044 readBoolean(parser, restrictions, 1045 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1046 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1047 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1048 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1049 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1050 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1051 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1052 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1053 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1054 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1055 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1056 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1057 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1058 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1059 readBoolean(parser, restrictions, 1060 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1061 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1062 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1063 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1064 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1065 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1066 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1067 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1068 readBoolean(parser, restrictions, UserManager.DISALLOW_WALLPAPER); 1069 readBoolean(parser, restrictions, UserManager.DISALLOW_SAFE_BOOT); 1070 } 1071 1072 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1073 String restrictionKey) { 1074 String value = parser.getAttributeValue(null, restrictionKey); 1075 if (value != null) { 1076 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1077 } 1078 } 1079 1080 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1081 throws IOException { 1082 if (restrictions.containsKey(restrictionKey)) { 1083 xml.attribute(null, restrictionKey, 1084 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1085 } 1086 } 1087 1088 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1089 String valueString = parser.getAttributeValue(null, attr); 1090 if (valueString == null) return defaultValue; 1091 try { 1092 return Integer.parseInt(valueString); 1093 } catch (NumberFormatException nfe) { 1094 return defaultValue; 1095 } 1096 } 1097 1098 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1099 String valueString = parser.getAttributeValue(null, attr); 1100 if (valueString == null) return defaultValue; 1101 try { 1102 return Long.parseLong(valueString); 1103 } catch (NumberFormatException nfe) { 1104 return defaultValue; 1105 } 1106 } 1107 1108 private boolean isPackageInstalled(String pkg, int userId) { 1109 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1110 PackageManager.GET_UNINSTALLED_PACKAGES, 1111 userId); 1112 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1113 return false; 1114 } 1115 return true; 1116 } 1117 1118 /** 1119 * Removes all the restrictions files (res_<packagename>) for a given user. 1120 * Does not do any permissions checking. 1121 */ 1122 private void cleanAppRestrictions(int userId) { 1123 synchronized (mPackagesLock) { 1124 File dir = Environment.getUserSystemDirectory(userId); 1125 String[] files = dir.list(); 1126 if (files == null) return; 1127 for (String fileName : files) { 1128 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1129 File resFile = new File(dir, fileName); 1130 if (resFile.exists()) { 1131 resFile.delete(); 1132 } 1133 } 1134 } 1135 } 1136 } 1137 1138 /** 1139 * Removes the app restrictions file for a specific package and user id, if it exists. 1140 */ 1141 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1142 synchronized (mPackagesLock) { 1143 File dir = Environment.getUserSystemDirectory(userId); 1144 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1145 if (resFile.exists()) { 1146 resFile.delete(); 1147 } 1148 } 1149 } 1150 1151 @Override 1152 public UserInfo createProfileForUser(String name, int flags, int userId) { 1153 checkManageUsersPermission("Only the system can create users"); 1154 if (userId != UserHandle.USER_OWNER) { 1155 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1156 return null; 1157 } 1158 return createUserInternal(name, flags, userId); 1159 } 1160 1161 @Override 1162 public UserInfo createUser(String name, int flags) { 1163 checkManageUsersPermission("Only the system can create users"); 1164 return createUserInternal(name, flags, UserHandle.USER_NULL); 1165 } 1166 1167 private UserInfo createUserInternal(String name, int flags, int parentId) { 1168 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1169 UserManager.DISALLOW_ADD_USER, false)) { 1170 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1171 return null; 1172 } 1173 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1174 final long ident = Binder.clearCallingIdentity(); 1175 UserInfo userInfo = null; 1176 try { 1177 synchronized (mInstallLock) { 1178 synchronized (mPackagesLock) { 1179 UserInfo parent = null; 1180 if (parentId != UserHandle.USER_NULL) { 1181 parent = getUserInfoLocked(parentId); 1182 if (parent == null) return null; 1183 } 1184 // If we're not adding a guest user and the limit has been reached, 1185 // cannot add a user. 1186 if (!isGuest && isUserLimitReachedLocked()) { 1187 return null; 1188 } 1189 // If we're adding a guest and there already exists one, bail. 1190 if (isGuest && findCurrentGuestUserLocked() != null) { 1191 return null; 1192 } 1193 // Limit number of managed profiles that can be created 1194 if ((flags & UserInfo.FLAG_MANAGED_PROFILE) != 0 1195 && numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 1196 >= MAX_MANAGED_PROFILES) { 1197 return null; 1198 } 1199 int userId = getNextAvailableIdLocked(); 1200 userInfo = new UserInfo(userId, name, null, flags); 1201 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1202 userInfo.serialNumber = mNextSerialNumber++; 1203 long now = System.currentTimeMillis(); 1204 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1205 userInfo.partial = true; 1206 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1207 mUsers.put(userId, userInfo); 1208 writeUserListLocked(); 1209 if (parent != null) { 1210 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1211 parent.profileGroupId = parent.id; 1212 scheduleWriteUserLocked(parent); 1213 } 1214 userInfo.profileGroupId = parent.profileGroupId; 1215 } 1216 mPm.createNewUserLILPw(userId, userPath); 1217 userInfo.partial = false; 1218 scheduleWriteUserLocked(userInfo); 1219 updateUserIdsLocked(); 1220 Bundle restrictions = new Bundle(); 1221 mUserRestrictions.append(userId, restrictions); 1222 mPm.newUserCreatedLILPw(userId); 1223 } 1224 } 1225 if (userInfo != null) { 1226 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1227 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1228 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1229 android.Manifest.permission.MANAGE_USERS); 1230 } 1231 } finally { 1232 Binder.restoreCallingIdentity(ident); 1233 } 1234 return userInfo; 1235 } 1236 1237 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1238 int count = 0; 1239 for (int i = mUsers.size() - 1; i >= 0; i--) { 1240 UserInfo user = mUsers.valueAt(i); 1241 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1242 if ((user.flags & flags) != 0) { 1243 count++; 1244 } 1245 } 1246 } 1247 return count; 1248 } 1249 1250 /** 1251 * Find the current guest user. If the Guest user is partial, 1252 * then do not include it in the results as it is about to die. 1253 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1254 * the special handling of Guests being removed. 1255 */ 1256 private UserInfo findCurrentGuestUserLocked() { 1257 final int size = mUsers.size(); 1258 for (int i = 0; i < size; i++) { 1259 final UserInfo user = mUsers.valueAt(i); 1260 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1261 return user; 1262 } 1263 } 1264 return null; 1265 } 1266 1267 /** 1268 * Mark this guest user for deletion to allow us to create another guest 1269 * and switch to that user before actually removing this guest. 1270 * @param userHandle the userid of the current guest 1271 * @return whether the user could be marked for deletion 1272 */ 1273 public boolean markGuestForDeletion(int userHandle) { 1274 checkManageUsersPermission("Only the system can remove users"); 1275 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1276 UserManager.DISALLOW_REMOVE_USER, false)) { 1277 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1278 return false; 1279 } 1280 1281 long ident = Binder.clearCallingIdentity(); 1282 try { 1283 final UserInfo user; 1284 synchronized (mPackagesLock) { 1285 user = mUsers.get(userHandle); 1286 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1287 return false; 1288 } 1289 if (!user.isGuest()) { 1290 return false; 1291 } 1292 // We set this to a guest user that is to be removed. This is a temporary state 1293 // where we are allowed to add new Guest users, even if this one is still not 1294 // removed. This user will still show up in getUserInfo() calls. 1295 // If we don't get around to removing this Guest user, it will be purged on next 1296 // startup. 1297 user.guestToRemove = true; 1298 // Mark it as disabled, so that it isn't returned any more when 1299 // profiles are queried. 1300 user.flags |= UserInfo.FLAG_DISABLED; 1301 writeUserLocked(user); 1302 } 1303 } finally { 1304 Binder.restoreCallingIdentity(ident); 1305 } 1306 return true; 1307 } 1308 1309 /** 1310 * Removes a user and all data directories created for that user. This method should be called 1311 * after the user's processes have been terminated. 1312 * @param userHandle the user's id 1313 */ 1314 public boolean removeUser(int userHandle) { 1315 checkManageUsersPermission("Only the system can remove users"); 1316 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1317 UserManager.DISALLOW_REMOVE_USER, false)) { 1318 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1319 return false; 1320 } 1321 1322 long ident = Binder.clearCallingIdentity(); 1323 try { 1324 final UserInfo user; 1325 synchronized (mPackagesLock) { 1326 user = mUsers.get(userHandle); 1327 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1328 return false; 1329 } 1330 1331 // We remember deleted user IDs to prevent them from being 1332 // reused during the current boot; they can still be reused 1333 // after a reboot. 1334 mRemovingUserIds.put(userHandle, true); 1335 1336 try { 1337 mAppOpsService.removeUser(userHandle); 1338 } catch (RemoteException e) { 1339 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1340 } 1341 // Set this to a partially created user, so that the user will be purged 1342 // on next startup, in case the runtime stops now before stopping and 1343 // removing the user completely. 1344 user.partial = true; 1345 // Mark it as disabled, so that it isn't returned any more when 1346 // profiles are queried. 1347 user.flags |= UserInfo.FLAG_DISABLED; 1348 writeUserLocked(user); 1349 } 1350 1351 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1352 && user.isManagedProfile()) { 1353 // Send broadcast to notify system that the user removed was a 1354 // managed user. 1355 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1356 } 1357 1358 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1359 int res; 1360 try { 1361 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1362 new IStopUserCallback.Stub() { 1363 @Override 1364 public void userStopped(int userId) { 1365 finishRemoveUser(userId); 1366 } 1367 @Override 1368 public void userStopAborted(int userId) { 1369 } 1370 }); 1371 } catch (RemoteException e) { 1372 return false; 1373 } 1374 return res == ActivityManager.USER_OP_SUCCESS; 1375 } finally { 1376 Binder.restoreCallingIdentity(ident); 1377 } 1378 } 1379 1380 void finishRemoveUser(final int userHandle) { 1381 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1382 // Let other services shutdown any activity and clean up their state before completely 1383 // wiping the user's system directory and removing from the user list 1384 long ident = Binder.clearCallingIdentity(); 1385 try { 1386 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1387 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1388 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1389 android.Manifest.permission.MANAGE_USERS, 1390 1391 new BroadcastReceiver() { 1392 @Override 1393 public void onReceive(Context context, Intent intent) { 1394 if (DBG) { 1395 Slog.i(LOG_TAG, 1396 "USER_REMOVED broadcast sent, cleaning up user data " 1397 + userHandle); 1398 } 1399 new Thread() { 1400 public void run() { 1401 synchronized (mInstallLock) { 1402 synchronized (mPackagesLock) { 1403 removeUserStateLocked(userHandle); 1404 } 1405 } 1406 } 1407 }.start(); 1408 } 1409 }, 1410 1411 null, Activity.RESULT_OK, null, null); 1412 } finally { 1413 Binder.restoreCallingIdentity(ident); 1414 } 1415 } 1416 1417 private void removeUserStateLocked(final int userHandle) { 1418 // Cleanup package manager settings 1419 mPm.cleanUpUserLILPw(this, userHandle); 1420 1421 // Remove this user from the list 1422 mUsers.remove(userHandle); 1423 1424 mRestrictionsPinStates.remove(userHandle); 1425 // Remove user file 1426 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1427 userFile.delete(); 1428 // Update the user list 1429 writeUserListLocked(); 1430 updateUserIdsLocked(); 1431 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1432 } 1433 1434 private void removeDirectoryRecursive(File parent) { 1435 if (parent.isDirectory()) { 1436 String[] files = parent.list(); 1437 for (String filename : files) { 1438 File child = new File(parent, filename); 1439 removeDirectoryRecursive(child); 1440 } 1441 } 1442 parent.delete(); 1443 } 1444 1445 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1446 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1447 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1448 Intent.FLAG_RECEIVER_FOREGROUND); 1449 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1450 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1451 } 1452 1453 @Override 1454 public Bundle getApplicationRestrictions(String packageName) { 1455 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1456 } 1457 1458 @Override 1459 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1460 if (UserHandle.getCallingUserId() != userId 1461 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1462 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1463 } 1464 synchronized (mPackagesLock) { 1465 // Read the restrictions from XML 1466 return readApplicationRestrictionsLocked(packageName, userId); 1467 } 1468 } 1469 1470 @Override 1471 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1472 int userId) { 1473 if (UserHandle.getCallingUserId() != userId 1474 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1475 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1476 } 1477 synchronized (mPackagesLock) { 1478 if (restrictions == null || restrictions.isEmpty()) { 1479 cleanAppRestrictionsForPackage(packageName, userId); 1480 } else { 1481 // Write the restrictions to XML 1482 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1483 } 1484 } 1485 1486 if (isPackageInstalled(packageName, userId)) { 1487 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1488 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1489 changeIntent.setPackage(packageName); 1490 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1491 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1492 } 1493 } 1494 1495 @Override 1496 public boolean setRestrictionsChallenge(String newPin) { 1497 checkManageUsersPermission("Only system can modify the restrictions pin"); 1498 int userId = UserHandle.getCallingUserId(); 1499 synchronized (mPackagesLock) { 1500 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1501 if (pinState == null) { 1502 pinState = new RestrictionsPinState(); 1503 } 1504 if (newPin == null) { 1505 pinState.salt = 0; 1506 pinState.pinHash = null; 1507 } else { 1508 try { 1509 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1510 } catch (NoSuchAlgorithmException e) { 1511 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1512 } 1513 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1514 pinState.failedAttempts = 0; 1515 } 1516 mRestrictionsPinStates.put(userId, pinState); 1517 writeUserLocked(mUsers.get(userId)); 1518 } 1519 return true; 1520 } 1521 1522 @Override 1523 public int checkRestrictionsChallenge(String pin) { 1524 checkManageUsersPermission("Only system can verify the restrictions pin"); 1525 int userId = UserHandle.getCallingUserId(); 1526 synchronized (mPackagesLock) { 1527 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1528 // If there's no pin set, return error code 1529 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1530 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1531 } else if (pin == null) { 1532 // If just checking if user can be prompted, return remaining time 1533 int waitTime = getRemainingTimeForPinAttempt(pinState); 1534 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1535 return waitTime; 1536 } else { 1537 int waitTime = getRemainingTimeForPinAttempt(pinState); 1538 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1539 if (waitTime > 0) { 1540 return waitTime; 1541 } 1542 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1543 pinState.failedAttempts = 0; 1544 scheduleWriteUserLocked(mUsers.get(userId)); 1545 return UserManager.PIN_VERIFICATION_SUCCESS; 1546 } else { 1547 pinState.failedAttempts++; 1548 pinState.lastAttemptTime = System.currentTimeMillis(); 1549 scheduleWriteUserLocked(mUsers.get(userId)); 1550 return waitTime; 1551 } 1552 } 1553 } 1554 } 1555 1556 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1557 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1558 BACKOFF_TIMES.length - 1); 1559 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1560 BACKOFF_TIMES[backoffIndex] : 0; 1561 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1562 0); 1563 } 1564 1565 @Override 1566 public boolean hasRestrictionsChallenge() { 1567 int userId = UserHandle.getCallingUserId(); 1568 synchronized (mPackagesLock) { 1569 return hasRestrictionsPinLocked(userId); 1570 } 1571 } 1572 1573 private boolean hasRestrictionsPinLocked(int userId) { 1574 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1575 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1576 return false; 1577 } 1578 return true; 1579 } 1580 1581 @Override 1582 public void removeRestrictions() { 1583 checkManageUsersPermission("Only system can remove restrictions"); 1584 final int userHandle = UserHandle.getCallingUserId(); 1585 removeRestrictionsForUser(userHandle, true); 1586 } 1587 1588 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1589 synchronized (mPackagesLock) { 1590 // Remove all user restrictions 1591 setUserRestrictions(new Bundle(), userHandle); 1592 // Remove restrictions pin 1593 setRestrictionsChallenge(null); 1594 // Remove any app restrictions 1595 cleanAppRestrictions(userHandle); 1596 } 1597 if (unhideApps) { 1598 unhideAllInstalledAppsForUser(userHandle); 1599 } 1600 } 1601 1602 private void unhideAllInstalledAppsForUser(final int userHandle) { 1603 mHandler.post(new Runnable() { 1604 @Override 1605 public void run() { 1606 List<ApplicationInfo> apps = 1607 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1608 userHandle).getList(); 1609 final long ident = Binder.clearCallingIdentity(); 1610 try { 1611 for (ApplicationInfo appInfo : apps) { 1612 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1613 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1614 != 0) { 1615 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1616 userHandle); 1617 } 1618 } 1619 } finally { 1620 Binder.restoreCallingIdentity(ident); 1621 } 1622 } 1623 }); 1624 } 1625 1626 /* 1627 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1628 * Not the most secure, but it is at least a second level of protection. First level is that 1629 * the file is in a location only readable by the system process. 1630 * @param password the password. 1631 * @param salt the randomly generated salt 1632 * @return the hash of the pattern in a String. 1633 */ 1634 private String passwordToHash(String password, long salt) { 1635 if (password == null) { 1636 return null; 1637 } 1638 String algo = null; 1639 String hashed = salt + password; 1640 try { 1641 byte[] saltedPassword = (password + salt).getBytes(); 1642 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1643 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1644 hashed = toHex(sha1) + toHex(md5); 1645 } catch (NoSuchAlgorithmException e) { 1646 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1647 } 1648 return hashed; 1649 } 1650 1651 private static String toHex(byte[] ary) { 1652 final String hex = "0123456789ABCDEF"; 1653 String ret = ""; 1654 for (int i = 0; i < ary.length; i++) { 1655 ret += hex.charAt((ary[i] >> 4) & 0xf); 1656 ret += hex.charAt(ary[i] & 0xf); 1657 } 1658 return ret; 1659 } 1660 1661 private int getUidForPackage(String packageName) { 1662 long ident = Binder.clearCallingIdentity(); 1663 try { 1664 return mContext.getPackageManager().getApplicationInfo(packageName, 1665 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1666 } catch (NameNotFoundException nnfe) { 1667 return -1; 1668 } finally { 1669 Binder.restoreCallingIdentity(ident); 1670 } 1671 } 1672 1673 private Bundle readApplicationRestrictionsLocked(String packageName, 1674 int userId) { 1675 final Bundle restrictions = new Bundle(); 1676 final ArrayList<String> values = new ArrayList<String>(); 1677 1678 FileInputStream fis = null; 1679 try { 1680 AtomicFile restrictionsFile = 1681 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1682 packageToRestrictionsFileName(packageName))); 1683 fis = restrictionsFile.openRead(); 1684 XmlPullParser parser = Xml.newPullParser(); 1685 parser.setInput(fis, null); 1686 int type; 1687 while ((type = parser.next()) != XmlPullParser.START_TAG 1688 && type != XmlPullParser.END_DOCUMENT) { 1689 ; 1690 } 1691 1692 if (type != XmlPullParser.START_TAG) { 1693 Slog.e(LOG_TAG, "Unable to read restrictions file " 1694 + restrictionsFile.getBaseFile()); 1695 return restrictions; 1696 } 1697 1698 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1699 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1700 String key = parser.getAttributeValue(null, ATTR_KEY); 1701 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1702 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1703 if (multiple != null) { 1704 values.clear(); 1705 int count = Integer.parseInt(multiple); 1706 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1707 if (type == XmlPullParser.START_TAG 1708 && parser.getName().equals(TAG_VALUE)) { 1709 values.add(parser.nextText().trim()); 1710 count--; 1711 } 1712 } 1713 String [] valueStrings = new String[values.size()]; 1714 values.toArray(valueStrings); 1715 restrictions.putStringArray(key, valueStrings); 1716 } else { 1717 String value = parser.nextText().trim(); 1718 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1719 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1720 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1721 restrictions.putInt(key, Integer.parseInt(value)); 1722 } else { 1723 restrictions.putString(key, value); 1724 } 1725 } 1726 } 1727 } 1728 } catch (IOException ioe) { 1729 } catch (XmlPullParserException pe) { 1730 } finally { 1731 if (fis != null) { 1732 try { 1733 fis.close(); 1734 } catch (IOException e) { 1735 } 1736 } 1737 } 1738 return restrictions; 1739 } 1740 1741 private void writeApplicationRestrictionsLocked(String packageName, 1742 Bundle restrictions, int userId) { 1743 FileOutputStream fos = null; 1744 AtomicFile restrictionsFile = new AtomicFile( 1745 new File(Environment.getUserSystemDirectory(userId), 1746 packageToRestrictionsFileName(packageName))); 1747 try { 1748 fos = restrictionsFile.startWrite(); 1749 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1750 1751 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1752 final XmlSerializer serializer = new FastXmlSerializer(); 1753 serializer.setOutput(bos, "utf-8"); 1754 serializer.startDocument(null, true); 1755 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1756 1757 serializer.startTag(null, TAG_RESTRICTIONS); 1758 1759 for (String key : restrictions.keySet()) { 1760 Object value = restrictions.get(key); 1761 serializer.startTag(null, TAG_ENTRY); 1762 serializer.attribute(null, ATTR_KEY, key); 1763 1764 if (value instanceof Boolean) { 1765 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1766 serializer.text(value.toString()); 1767 } else if (value instanceof Integer) { 1768 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1769 serializer.text(value.toString()); 1770 } else if (value == null || value instanceof String) { 1771 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1772 serializer.text(value != null ? (String) value : ""); 1773 } else { 1774 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1775 String[] values = (String[]) value; 1776 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1777 for (String choice : values) { 1778 serializer.startTag(null, TAG_VALUE); 1779 serializer.text(choice != null ? choice : ""); 1780 serializer.endTag(null, TAG_VALUE); 1781 } 1782 } 1783 serializer.endTag(null, TAG_ENTRY); 1784 } 1785 1786 serializer.endTag(null, TAG_RESTRICTIONS); 1787 1788 serializer.endDocument(); 1789 restrictionsFile.finishWrite(fos); 1790 } catch (Exception e) { 1791 restrictionsFile.failWrite(fos); 1792 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1793 } 1794 } 1795 1796 @Override 1797 public int getUserSerialNumber(int userHandle) { 1798 synchronized (mPackagesLock) { 1799 if (!exists(userHandle)) return -1; 1800 return getUserInfoLocked(userHandle).serialNumber; 1801 } 1802 } 1803 1804 @Override 1805 public int getUserHandle(int userSerialNumber) { 1806 synchronized (mPackagesLock) { 1807 for (int userId : mUserIds) { 1808 UserInfo info = getUserInfoLocked(userId); 1809 if (info != null && info.serialNumber == userSerialNumber) return userId; 1810 } 1811 // Not found 1812 return -1; 1813 } 1814 } 1815 1816 /** 1817 * Caches the list of user ids in an array, adjusting the array size when necessary. 1818 */ 1819 private void updateUserIdsLocked() { 1820 int num = 0; 1821 for (int i = 0; i < mUsers.size(); i++) { 1822 if (!mUsers.valueAt(i).partial) { 1823 num++; 1824 } 1825 } 1826 final int[] newUsers = new int[num]; 1827 int n = 0; 1828 for (int i = 0; i < mUsers.size(); i++) { 1829 if (!mUsers.valueAt(i).partial) { 1830 newUsers[n++] = mUsers.keyAt(i); 1831 } 1832 } 1833 mUserIds = newUsers; 1834 } 1835 1836 /** 1837 * Make a note of the last started time of a user and do some cleanup. 1838 * @param userId the user that was just foregrounded 1839 */ 1840 public void userForeground(int userId) { 1841 synchronized (mPackagesLock) { 1842 UserInfo user = mUsers.get(userId); 1843 long now = System.currentTimeMillis(); 1844 if (user == null || user.partial) { 1845 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1846 return; 1847 } 1848 if (now > EPOCH_PLUS_30_YEARS) { 1849 user.lastLoggedInTime = now; 1850 scheduleWriteUserLocked(user); 1851 } 1852 } 1853 } 1854 1855 /** 1856 * Returns the next available user id, filling in any holes in the ids. 1857 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1858 * for data and battery stats collection, or unexpected cross-talk. 1859 * @return 1860 */ 1861 private int getNextAvailableIdLocked() { 1862 synchronized (mPackagesLock) { 1863 int i = MIN_USER_ID; 1864 while (i < Integer.MAX_VALUE) { 1865 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1866 break; 1867 } 1868 i++; 1869 } 1870 return i; 1871 } 1872 } 1873 1874 private String packageToRestrictionsFileName(String packageName) { 1875 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1876 } 1877 1878 private String restrictionsFileNameToPackage(String fileName) { 1879 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1880 (int) (fileName.length() - XML_SUFFIX.length())); 1881 } 1882 1883 @Override 1884 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1885 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1886 != PackageManager.PERMISSION_GRANTED) { 1887 pw.println("Permission Denial: can't dump UserManager from from pid=" 1888 + Binder.getCallingPid() 1889 + ", uid=" + Binder.getCallingUid() 1890 + " without permission " 1891 + android.Manifest.permission.DUMP); 1892 return; 1893 } 1894 1895 long now = System.currentTimeMillis(); 1896 StringBuilder sb = new StringBuilder(); 1897 synchronized (mPackagesLock) { 1898 pw.println("Users:"); 1899 for (int i = 0; i < mUsers.size(); i++) { 1900 UserInfo user = mUsers.valueAt(i); 1901 if (user == null) continue; 1902 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1903 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1904 if (user.partial) pw.print(" <partial>"); 1905 pw.println(); 1906 pw.print(" Created: "); 1907 if (user.creationTime == 0) { 1908 pw.println("<unknown>"); 1909 } else { 1910 sb.setLength(0); 1911 TimeUtils.formatDuration(now - user.creationTime, sb); 1912 sb.append(" ago"); 1913 pw.println(sb); 1914 } 1915 pw.print(" Last logged in: "); 1916 if (user.lastLoggedInTime == 0) { 1917 pw.println("<unknown>"); 1918 } else { 1919 sb.setLength(0); 1920 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1921 sb.append(" ago"); 1922 pw.println(sb); 1923 } 1924 } 1925 } 1926 } 1927 1928 final class MainHandler extends Handler { 1929 1930 @Override 1931 public void handleMessage(Message msg) { 1932 switch (msg.what) { 1933 case WRITE_USER_MSG: 1934 removeMessages(WRITE_USER_MSG, msg.obj); 1935 synchronized (mPackagesLock) { 1936 int userId = ((UserInfo) msg.obj).id; 1937 UserInfo userInfo = mUsers.get(userId); 1938 if (userInfo != null) { 1939 writeUserLocked(userInfo); 1940 } 1941 } 1942 } 1943 } 1944 } 1945} 1946