UserManagerService.java revision 1bdff9139fd412b36d5d2d783574b6418fcb198a
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 serializer.endTag(null, TAG_RESTRICTIONS); 921 } 922 923 private UserInfo readUserLocked(int id) { 924 int flags = 0; 925 int serialNumber = id; 926 String name = null; 927 String iconPath = null; 928 long creationTime = 0L; 929 long lastLoggedInTime = 0L; 930 long salt = 0L; 931 String pinHash = null; 932 int failedAttempts = 0; 933 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 934 long lastAttemptTime = 0L; 935 boolean partial = false; 936 boolean guestToRemove = false; 937 Bundle restrictions = new Bundle(); 938 939 FileInputStream fis = null; 940 try { 941 AtomicFile userFile = 942 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 943 fis = userFile.openRead(); 944 XmlPullParser parser = Xml.newPullParser(); 945 parser.setInput(fis, null); 946 int type; 947 while ((type = parser.next()) != XmlPullParser.START_TAG 948 && type != XmlPullParser.END_DOCUMENT) { 949 ; 950 } 951 952 if (type != XmlPullParser.START_TAG) { 953 Slog.e(LOG_TAG, "Unable to read user " + id); 954 return null; 955 } 956 957 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 958 int storedId = readIntAttribute(parser, ATTR_ID, -1); 959 if (storedId != id) { 960 Slog.e(LOG_TAG, "User id does not match the file name"); 961 return null; 962 } 963 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 964 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 965 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 966 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 967 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 968 salt = readLongAttribute(parser, ATTR_SALT, 0L); 969 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 970 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 971 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 972 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 973 UserInfo.NO_PROFILE_GROUP_ID); 974 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 975 if ("true".equals(valueString)) { 976 partial = true; 977 } 978 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 979 if ("true".equals(valueString)) { 980 guestToRemove = true; 981 } 982 983 int outerDepth = parser.getDepth(); 984 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 985 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 986 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 987 continue; 988 } 989 String tag = parser.getName(); 990 if (TAG_NAME.equals(tag)) { 991 type = parser.next(); 992 if (type == XmlPullParser.TEXT) { 993 name = parser.getText(); 994 } 995 } else if (TAG_RESTRICTIONS.equals(tag)) { 996 readRestrictionsLocked(parser, restrictions); 997 } 998 } 999 } 1000 1001 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1002 userInfo.serialNumber = serialNumber; 1003 userInfo.creationTime = creationTime; 1004 userInfo.lastLoggedInTime = lastLoggedInTime; 1005 userInfo.partial = partial; 1006 userInfo.guestToRemove = guestToRemove; 1007 userInfo.profileGroupId = profileGroupId; 1008 mUserRestrictions.append(id, restrictions); 1009 if (salt != 0L) { 1010 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 1011 if (pinState == null) { 1012 pinState = new RestrictionsPinState(); 1013 mRestrictionsPinStates.put(id, pinState); 1014 } 1015 pinState.salt = salt; 1016 pinState.pinHash = pinHash; 1017 pinState.failedAttempts = failedAttempts; 1018 pinState.lastAttemptTime = lastAttemptTime; 1019 } 1020 return userInfo; 1021 1022 } catch (IOException ioe) { 1023 } catch (XmlPullParserException pe) { 1024 } finally { 1025 if (fis != null) { 1026 try { 1027 fis.close(); 1028 } catch (IOException e) { 1029 } 1030 } 1031 } 1032 return null; 1033 } 1034 1035 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1036 throws IOException { 1037 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1038 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1039 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1040 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1041 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1042 readBoolean(parser, restrictions, 1043 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1044 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1045 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1046 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1047 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1048 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1049 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1050 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1051 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1052 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1053 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1054 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1055 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1056 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1057 readBoolean(parser, restrictions, 1058 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1059 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1060 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1061 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1062 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1063 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1064 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1065 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1066 } 1067 1068 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1069 String restrictionKey) { 1070 String value = parser.getAttributeValue(null, restrictionKey); 1071 if (value != null) { 1072 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1073 } 1074 } 1075 1076 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1077 throws IOException { 1078 if (restrictions.containsKey(restrictionKey)) { 1079 xml.attribute(null, restrictionKey, 1080 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1081 } 1082 } 1083 1084 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1085 String valueString = parser.getAttributeValue(null, attr); 1086 if (valueString == null) return defaultValue; 1087 try { 1088 return Integer.parseInt(valueString); 1089 } catch (NumberFormatException nfe) { 1090 return defaultValue; 1091 } 1092 } 1093 1094 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1095 String valueString = parser.getAttributeValue(null, attr); 1096 if (valueString == null) return defaultValue; 1097 try { 1098 return Long.parseLong(valueString); 1099 } catch (NumberFormatException nfe) { 1100 return defaultValue; 1101 } 1102 } 1103 1104 private boolean isPackageInstalled(String pkg, int userId) { 1105 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1106 PackageManager.GET_UNINSTALLED_PACKAGES, 1107 userId); 1108 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1109 return false; 1110 } 1111 return true; 1112 } 1113 1114 /** 1115 * Removes all the restrictions files (res_<packagename>) for a given user. 1116 * Does not do any permissions checking. 1117 */ 1118 private void cleanAppRestrictions(int userId) { 1119 synchronized (mPackagesLock) { 1120 File dir = Environment.getUserSystemDirectory(userId); 1121 String[] files = dir.list(); 1122 if (files == null) return; 1123 for (String fileName : files) { 1124 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1125 File resFile = new File(dir, fileName); 1126 if (resFile.exists()) { 1127 resFile.delete(); 1128 } 1129 } 1130 } 1131 } 1132 } 1133 1134 /** 1135 * Removes the app restrictions file for a specific package and user id, if it exists. 1136 */ 1137 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1138 synchronized (mPackagesLock) { 1139 File dir = Environment.getUserSystemDirectory(userId); 1140 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1141 if (resFile.exists()) { 1142 resFile.delete(); 1143 } 1144 } 1145 } 1146 1147 @Override 1148 public UserInfo createProfileForUser(String name, int flags, int userId) { 1149 checkManageUsersPermission("Only the system can create users"); 1150 if (userId != UserHandle.USER_OWNER) { 1151 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1152 return null; 1153 } 1154 return createUserInternal(name, flags, userId); 1155 } 1156 1157 @Override 1158 public UserInfo createUser(String name, int flags) { 1159 checkManageUsersPermission("Only the system can create users"); 1160 return createUserInternal(name, flags, UserHandle.USER_NULL); 1161 } 1162 1163 private UserInfo createUserInternal(String name, int flags, int parentId) { 1164 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1165 UserManager.DISALLOW_ADD_USER, false)) { 1166 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1167 return null; 1168 } 1169 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1170 final long ident = Binder.clearCallingIdentity(); 1171 UserInfo userInfo = null; 1172 try { 1173 synchronized (mInstallLock) { 1174 synchronized (mPackagesLock) { 1175 UserInfo parent = null; 1176 if (parentId != UserHandle.USER_NULL) { 1177 parent = getUserInfoLocked(parentId); 1178 if (parent == null) return null; 1179 } 1180 // If we're not adding a guest user and the limit has been reached, 1181 // cannot add a user. 1182 if (!isGuest && isUserLimitReachedLocked()) { 1183 return null; 1184 } 1185 // If we're adding a guest and there already exists one, bail. 1186 if (isGuest && findCurrentGuestUserLocked() != null) { 1187 return null; 1188 } 1189 // Limit number of managed profiles that can be created 1190 if ((flags & UserInfo.FLAG_MANAGED_PROFILE) != 0 1191 && numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 1192 >= MAX_MANAGED_PROFILES) { 1193 return null; 1194 } 1195 int userId = getNextAvailableIdLocked(); 1196 userInfo = new UserInfo(userId, name, null, flags); 1197 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1198 userInfo.serialNumber = mNextSerialNumber++; 1199 long now = System.currentTimeMillis(); 1200 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1201 userInfo.partial = true; 1202 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1203 mUsers.put(userId, userInfo); 1204 writeUserListLocked(); 1205 if (parent != null) { 1206 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1207 parent.profileGroupId = parent.id; 1208 scheduleWriteUserLocked(parent); 1209 } 1210 userInfo.profileGroupId = parent.profileGroupId; 1211 } 1212 mPm.createNewUserLILPw(userId, userPath); 1213 userInfo.partial = false; 1214 scheduleWriteUserLocked(userInfo); 1215 updateUserIdsLocked(); 1216 Bundle restrictions = new Bundle(); 1217 mUserRestrictions.append(userId, restrictions); 1218 } 1219 } 1220 if (userInfo != null) { 1221 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1222 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1223 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1224 android.Manifest.permission.MANAGE_USERS); 1225 } 1226 } finally { 1227 Binder.restoreCallingIdentity(ident); 1228 } 1229 return userInfo; 1230 } 1231 1232 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1233 int count = 0; 1234 for (int i = mUsers.size() - 1; i >= 0; i--) { 1235 UserInfo user = mUsers.valueAt(i); 1236 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1237 if ((user.flags & flags) != 0) { 1238 count++; 1239 } 1240 } 1241 } 1242 return count; 1243 } 1244 1245 /** 1246 * Find the current guest user. If the Guest user is partial, 1247 * then do not include it in the results as it is about to die. 1248 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1249 * the special handling of Guests being removed. 1250 */ 1251 private UserInfo findCurrentGuestUserLocked() { 1252 final int size = mUsers.size(); 1253 for (int i = 0; i < size; i++) { 1254 final UserInfo user = mUsers.valueAt(i); 1255 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1256 return user; 1257 } 1258 } 1259 return null; 1260 } 1261 1262 /** 1263 * Mark this guest user for deletion to allow us to create another guest 1264 * and switch to that user before actually removing this guest. 1265 * @param userHandle the userid of the current guest 1266 * @return whether the user could be marked for deletion 1267 */ 1268 public boolean markGuestForDeletion(int userHandle) { 1269 checkManageUsersPermission("Only the system can remove users"); 1270 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1271 UserManager.DISALLOW_REMOVE_USER, false)) { 1272 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1273 return false; 1274 } 1275 1276 long ident = Binder.clearCallingIdentity(); 1277 try { 1278 final UserInfo user; 1279 synchronized (mPackagesLock) { 1280 user = mUsers.get(userHandle); 1281 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1282 return false; 1283 } 1284 if (!user.isGuest()) { 1285 return false; 1286 } 1287 // We set this to a guest user that is to be removed. This is a temporary state 1288 // where we are allowed to add new Guest users, even if this one is still not 1289 // removed. This user will still show up in getUserInfo() calls. 1290 // If we don't get around to removing this Guest user, it will be purged on next 1291 // startup. 1292 user.guestToRemove = true; 1293 // Mark it as disabled, so that it isn't returned any more when 1294 // profiles are queried. 1295 user.flags |= UserInfo.FLAG_DISABLED; 1296 writeUserLocked(user); 1297 } 1298 } finally { 1299 Binder.restoreCallingIdentity(ident); 1300 } 1301 return true; 1302 } 1303 1304 /** 1305 * Removes a user and all data directories created for that user. This method should be called 1306 * after the user's processes have been terminated. 1307 * @param userHandle the user's id 1308 */ 1309 public boolean removeUser(int userHandle) { 1310 checkManageUsersPermission("Only the system can remove users"); 1311 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1312 UserManager.DISALLOW_REMOVE_USER, false)) { 1313 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1314 return false; 1315 } 1316 1317 long ident = Binder.clearCallingIdentity(); 1318 try { 1319 final UserInfo user; 1320 synchronized (mPackagesLock) { 1321 user = mUsers.get(userHandle); 1322 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1323 return false; 1324 } 1325 1326 // We remember deleted user IDs to prevent them from being 1327 // reused during the current boot; they can still be reused 1328 // after a reboot. 1329 mRemovingUserIds.put(userHandle, true); 1330 1331 try { 1332 mAppOpsService.removeUser(userHandle); 1333 } catch (RemoteException e) { 1334 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1335 } 1336 // Set this to a partially created user, so that the user will be purged 1337 // on next startup, in case the runtime stops now before stopping and 1338 // removing the user completely. 1339 user.partial = true; 1340 // Mark it as disabled, so that it isn't returned any more when 1341 // profiles are queried. 1342 user.flags |= UserInfo.FLAG_DISABLED; 1343 writeUserLocked(user); 1344 } 1345 1346 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1347 && user.isManagedProfile()) { 1348 // Send broadcast to notify system that the user removed was a 1349 // managed user. 1350 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1351 } 1352 1353 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1354 int res; 1355 try { 1356 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1357 new IStopUserCallback.Stub() { 1358 @Override 1359 public void userStopped(int userId) { 1360 finishRemoveUser(userId); 1361 } 1362 @Override 1363 public void userStopAborted(int userId) { 1364 } 1365 }); 1366 } catch (RemoteException e) { 1367 return false; 1368 } 1369 return res == ActivityManager.USER_OP_SUCCESS; 1370 } finally { 1371 Binder.restoreCallingIdentity(ident); 1372 } 1373 } 1374 1375 void finishRemoveUser(final int userHandle) { 1376 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1377 // Let other services shutdown any activity and clean up their state before completely 1378 // wiping the user's system directory and removing from the user list 1379 long ident = Binder.clearCallingIdentity(); 1380 try { 1381 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1382 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1383 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1384 android.Manifest.permission.MANAGE_USERS, 1385 1386 new BroadcastReceiver() { 1387 @Override 1388 public void onReceive(Context context, Intent intent) { 1389 if (DBG) { 1390 Slog.i(LOG_TAG, 1391 "USER_REMOVED broadcast sent, cleaning up user data " 1392 + userHandle); 1393 } 1394 new Thread() { 1395 public void run() { 1396 synchronized (mInstallLock) { 1397 synchronized (mPackagesLock) { 1398 removeUserStateLocked(userHandle); 1399 } 1400 } 1401 } 1402 }.start(); 1403 } 1404 }, 1405 1406 null, Activity.RESULT_OK, null, null); 1407 } finally { 1408 Binder.restoreCallingIdentity(ident); 1409 } 1410 } 1411 1412 private void removeUserStateLocked(final int userHandle) { 1413 // Cleanup package manager settings 1414 mPm.cleanUpUserLILPw(this, userHandle); 1415 1416 // Remove this user from the list 1417 mUsers.remove(userHandle); 1418 1419 mRestrictionsPinStates.remove(userHandle); 1420 // Remove user file 1421 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1422 userFile.delete(); 1423 // Update the user list 1424 writeUserListLocked(); 1425 updateUserIdsLocked(); 1426 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1427 } 1428 1429 private void removeDirectoryRecursive(File parent) { 1430 if (parent.isDirectory()) { 1431 String[] files = parent.list(); 1432 for (String filename : files) { 1433 File child = new File(parent, filename); 1434 removeDirectoryRecursive(child); 1435 } 1436 } 1437 parent.delete(); 1438 } 1439 1440 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1441 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1442 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1443 Intent.FLAG_RECEIVER_FOREGROUND); 1444 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1445 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1446 } 1447 1448 @Override 1449 public Bundle getApplicationRestrictions(String packageName) { 1450 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1451 } 1452 1453 @Override 1454 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1455 if (UserHandle.getCallingUserId() != userId 1456 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1457 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1458 } 1459 synchronized (mPackagesLock) { 1460 // Read the restrictions from XML 1461 return readApplicationRestrictionsLocked(packageName, userId); 1462 } 1463 } 1464 1465 @Override 1466 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1467 int userId) { 1468 if (UserHandle.getCallingUserId() != userId 1469 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1470 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1471 } 1472 synchronized (mPackagesLock) { 1473 if (restrictions == null || restrictions.isEmpty()) { 1474 cleanAppRestrictionsForPackage(packageName, userId); 1475 } else { 1476 // Write the restrictions to XML 1477 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1478 } 1479 } 1480 1481 if (isPackageInstalled(packageName, userId)) { 1482 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1483 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1484 changeIntent.setPackage(packageName); 1485 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1486 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1487 } 1488 } 1489 1490 @Override 1491 public boolean setRestrictionsChallenge(String newPin) { 1492 checkManageUsersPermission("Only system can modify the restrictions pin"); 1493 int userId = UserHandle.getCallingUserId(); 1494 synchronized (mPackagesLock) { 1495 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1496 if (pinState == null) { 1497 pinState = new RestrictionsPinState(); 1498 } 1499 if (newPin == null) { 1500 pinState.salt = 0; 1501 pinState.pinHash = null; 1502 } else { 1503 try { 1504 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1505 } catch (NoSuchAlgorithmException e) { 1506 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1507 } 1508 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1509 pinState.failedAttempts = 0; 1510 } 1511 mRestrictionsPinStates.put(userId, pinState); 1512 writeUserLocked(mUsers.get(userId)); 1513 } 1514 return true; 1515 } 1516 1517 @Override 1518 public int checkRestrictionsChallenge(String pin) { 1519 checkManageUsersPermission("Only system can verify the restrictions pin"); 1520 int userId = UserHandle.getCallingUserId(); 1521 synchronized (mPackagesLock) { 1522 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1523 // If there's no pin set, return error code 1524 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1525 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1526 } else if (pin == null) { 1527 // If just checking if user can be prompted, return remaining time 1528 int waitTime = getRemainingTimeForPinAttempt(pinState); 1529 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1530 return waitTime; 1531 } else { 1532 int waitTime = getRemainingTimeForPinAttempt(pinState); 1533 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1534 if (waitTime > 0) { 1535 return waitTime; 1536 } 1537 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1538 pinState.failedAttempts = 0; 1539 scheduleWriteUserLocked(mUsers.get(userId)); 1540 return UserManager.PIN_VERIFICATION_SUCCESS; 1541 } else { 1542 pinState.failedAttempts++; 1543 pinState.lastAttemptTime = System.currentTimeMillis(); 1544 scheduleWriteUserLocked(mUsers.get(userId)); 1545 return waitTime; 1546 } 1547 } 1548 } 1549 } 1550 1551 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1552 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1553 BACKOFF_TIMES.length - 1); 1554 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1555 BACKOFF_TIMES[backoffIndex] : 0; 1556 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1557 0); 1558 } 1559 1560 @Override 1561 public boolean hasRestrictionsChallenge() { 1562 int userId = UserHandle.getCallingUserId(); 1563 synchronized (mPackagesLock) { 1564 return hasRestrictionsPinLocked(userId); 1565 } 1566 } 1567 1568 private boolean hasRestrictionsPinLocked(int userId) { 1569 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1570 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1571 return false; 1572 } 1573 return true; 1574 } 1575 1576 @Override 1577 public void removeRestrictions() { 1578 checkManageUsersPermission("Only system can remove restrictions"); 1579 final int userHandle = UserHandle.getCallingUserId(); 1580 removeRestrictionsForUser(userHandle, true); 1581 } 1582 1583 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1584 synchronized (mPackagesLock) { 1585 // Remove all user restrictions 1586 setUserRestrictions(new Bundle(), userHandle); 1587 // Remove restrictions pin 1588 setRestrictionsChallenge(null); 1589 // Remove any app restrictions 1590 cleanAppRestrictions(userHandle); 1591 } 1592 if (unhideApps) { 1593 unhideAllInstalledAppsForUser(userHandle); 1594 } 1595 } 1596 1597 private void unhideAllInstalledAppsForUser(final int userHandle) { 1598 mHandler.post(new Runnable() { 1599 @Override 1600 public void run() { 1601 List<ApplicationInfo> apps = 1602 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1603 userHandle).getList(); 1604 final long ident = Binder.clearCallingIdentity(); 1605 try { 1606 for (ApplicationInfo appInfo : apps) { 1607 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1608 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1609 != 0) { 1610 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1611 userHandle); 1612 } 1613 } 1614 } finally { 1615 Binder.restoreCallingIdentity(ident); 1616 } 1617 } 1618 }); 1619 } 1620 1621 /* 1622 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1623 * Not the most secure, but it is at least a second level of protection. First level is that 1624 * the file is in a location only readable by the system process. 1625 * @param password the password. 1626 * @param salt the randomly generated salt 1627 * @return the hash of the pattern in a String. 1628 */ 1629 private String passwordToHash(String password, long salt) { 1630 if (password == null) { 1631 return null; 1632 } 1633 String algo = null; 1634 String hashed = salt + password; 1635 try { 1636 byte[] saltedPassword = (password + salt).getBytes(); 1637 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1638 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1639 hashed = toHex(sha1) + toHex(md5); 1640 } catch (NoSuchAlgorithmException e) { 1641 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1642 } 1643 return hashed; 1644 } 1645 1646 private static String toHex(byte[] ary) { 1647 final String hex = "0123456789ABCDEF"; 1648 String ret = ""; 1649 for (int i = 0; i < ary.length; i++) { 1650 ret += hex.charAt((ary[i] >> 4) & 0xf); 1651 ret += hex.charAt(ary[i] & 0xf); 1652 } 1653 return ret; 1654 } 1655 1656 private int getUidForPackage(String packageName) { 1657 long ident = Binder.clearCallingIdentity(); 1658 try { 1659 return mContext.getPackageManager().getApplicationInfo(packageName, 1660 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1661 } catch (NameNotFoundException nnfe) { 1662 return -1; 1663 } finally { 1664 Binder.restoreCallingIdentity(ident); 1665 } 1666 } 1667 1668 private Bundle readApplicationRestrictionsLocked(String packageName, 1669 int userId) { 1670 final Bundle restrictions = new Bundle(); 1671 final ArrayList<String> values = new ArrayList<String>(); 1672 1673 FileInputStream fis = null; 1674 try { 1675 AtomicFile restrictionsFile = 1676 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1677 packageToRestrictionsFileName(packageName))); 1678 fis = restrictionsFile.openRead(); 1679 XmlPullParser parser = Xml.newPullParser(); 1680 parser.setInput(fis, null); 1681 int type; 1682 while ((type = parser.next()) != XmlPullParser.START_TAG 1683 && type != XmlPullParser.END_DOCUMENT) { 1684 ; 1685 } 1686 1687 if (type != XmlPullParser.START_TAG) { 1688 Slog.e(LOG_TAG, "Unable to read restrictions file " 1689 + restrictionsFile.getBaseFile()); 1690 return restrictions; 1691 } 1692 1693 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1694 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1695 String key = parser.getAttributeValue(null, ATTR_KEY); 1696 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1697 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1698 if (multiple != null) { 1699 values.clear(); 1700 int count = Integer.parseInt(multiple); 1701 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1702 if (type == XmlPullParser.START_TAG 1703 && parser.getName().equals(TAG_VALUE)) { 1704 values.add(parser.nextText().trim()); 1705 count--; 1706 } 1707 } 1708 String [] valueStrings = new String[values.size()]; 1709 values.toArray(valueStrings); 1710 restrictions.putStringArray(key, valueStrings); 1711 } else { 1712 String value = parser.nextText().trim(); 1713 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1714 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1715 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1716 restrictions.putInt(key, Integer.parseInt(value)); 1717 } else { 1718 restrictions.putString(key, value); 1719 } 1720 } 1721 } 1722 } 1723 } catch (IOException ioe) { 1724 } catch (XmlPullParserException pe) { 1725 } finally { 1726 if (fis != null) { 1727 try { 1728 fis.close(); 1729 } catch (IOException e) { 1730 } 1731 } 1732 } 1733 return restrictions; 1734 } 1735 1736 private void writeApplicationRestrictionsLocked(String packageName, 1737 Bundle restrictions, int userId) { 1738 FileOutputStream fos = null; 1739 AtomicFile restrictionsFile = new AtomicFile( 1740 new File(Environment.getUserSystemDirectory(userId), 1741 packageToRestrictionsFileName(packageName))); 1742 try { 1743 fos = restrictionsFile.startWrite(); 1744 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1745 1746 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1747 final XmlSerializer serializer = new FastXmlSerializer(); 1748 serializer.setOutput(bos, "utf-8"); 1749 serializer.startDocument(null, true); 1750 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1751 1752 serializer.startTag(null, TAG_RESTRICTIONS); 1753 1754 for (String key : restrictions.keySet()) { 1755 Object value = restrictions.get(key); 1756 serializer.startTag(null, TAG_ENTRY); 1757 serializer.attribute(null, ATTR_KEY, key); 1758 1759 if (value instanceof Boolean) { 1760 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1761 serializer.text(value.toString()); 1762 } else if (value instanceof Integer) { 1763 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1764 serializer.text(value.toString()); 1765 } else if (value == null || value instanceof String) { 1766 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1767 serializer.text(value != null ? (String) value : ""); 1768 } else { 1769 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1770 String[] values = (String[]) value; 1771 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1772 for (String choice : values) { 1773 serializer.startTag(null, TAG_VALUE); 1774 serializer.text(choice != null ? choice : ""); 1775 serializer.endTag(null, TAG_VALUE); 1776 } 1777 } 1778 serializer.endTag(null, TAG_ENTRY); 1779 } 1780 1781 serializer.endTag(null, TAG_RESTRICTIONS); 1782 1783 serializer.endDocument(); 1784 restrictionsFile.finishWrite(fos); 1785 } catch (Exception e) { 1786 restrictionsFile.failWrite(fos); 1787 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1788 } 1789 } 1790 1791 @Override 1792 public int getUserSerialNumber(int userHandle) { 1793 synchronized (mPackagesLock) { 1794 if (!exists(userHandle)) return -1; 1795 return getUserInfoLocked(userHandle).serialNumber; 1796 } 1797 } 1798 1799 @Override 1800 public int getUserHandle(int userSerialNumber) { 1801 synchronized (mPackagesLock) { 1802 for (int userId : mUserIds) { 1803 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1804 } 1805 // Not found 1806 return -1; 1807 } 1808 } 1809 1810 /** 1811 * Caches the list of user ids in an array, adjusting the array size when necessary. 1812 */ 1813 private void updateUserIdsLocked() { 1814 int num = 0; 1815 for (int i = 0; i < mUsers.size(); i++) { 1816 if (!mUsers.valueAt(i).partial) { 1817 num++; 1818 } 1819 } 1820 final int[] newUsers = new int[num]; 1821 int n = 0; 1822 for (int i = 0; i < mUsers.size(); i++) { 1823 if (!mUsers.valueAt(i).partial) { 1824 newUsers[n++] = mUsers.keyAt(i); 1825 } 1826 } 1827 mUserIds = newUsers; 1828 } 1829 1830 /** 1831 * Make a note of the last started time of a user and do some cleanup. 1832 * @param userId the user that was just foregrounded 1833 */ 1834 public void userForeground(int userId) { 1835 synchronized (mPackagesLock) { 1836 UserInfo user = mUsers.get(userId); 1837 long now = System.currentTimeMillis(); 1838 if (user == null || user.partial) { 1839 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1840 return; 1841 } 1842 if (now > EPOCH_PLUS_30_YEARS) { 1843 user.lastLoggedInTime = now; 1844 scheduleWriteUserLocked(user); 1845 } 1846 } 1847 } 1848 1849 /** 1850 * Returns the next available user id, filling in any holes in the ids. 1851 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1852 * for data and battery stats collection, or unexpected cross-talk. 1853 * @return 1854 */ 1855 private int getNextAvailableIdLocked() { 1856 synchronized (mPackagesLock) { 1857 int i = MIN_USER_ID; 1858 while (i < Integer.MAX_VALUE) { 1859 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1860 break; 1861 } 1862 i++; 1863 } 1864 return i; 1865 } 1866 } 1867 1868 private String packageToRestrictionsFileName(String packageName) { 1869 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1870 } 1871 1872 private String restrictionsFileNameToPackage(String fileName) { 1873 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1874 (int) (fileName.length() - XML_SUFFIX.length())); 1875 } 1876 1877 @Override 1878 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1879 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1880 != PackageManager.PERMISSION_GRANTED) { 1881 pw.println("Permission Denial: can't dump UserManager from from pid=" 1882 + Binder.getCallingPid() 1883 + ", uid=" + Binder.getCallingUid() 1884 + " without permission " 1885 + android.Manifest.permission.DUMP); 1886 return; 1887 } 1888 1889 long now = System.currentTimeMillis(); 1890 StringBuilder sb = new StringBuilder(); 1891 synchronized (mPackagesLock) { 1892 pw.println("Users:"); 1893 for (int i = 0; i < mUsers.size(); i++) { 1894 UserInfo user = mUsers.valueAt(i); 1895 if (user == null) continue; 1896 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1897 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1898 if (user.partial) pw.print(" <partial>"); 1899 pw.println(); 1900 pw.print(" Created: "); 1901 if (user.creationTime == 0) { 1902 pw.println("<unknown>"); 1903 } else { 1904 sb.setLength(0); 1905 TimeUtils.formatDuration(now - user.creationTime, sb); 1906 sb.append(" ago"); 1907 pw.println(sb); 1908 } 1909 pw.print(" Last logged in: "); 1910 if (user.lastLoggedInTime == 0) { 1911 pw.println("<unknown>"); 1912 } else { 1913 sb.setLength(0); 1914 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1915 sb.append(" ago"); 1916 pw.println(sb); 1917 } 1918 } 1919 } 1920 } 1921 1922 final class MainHandler extends Handler { 1923 1924 @Override 1925 public void handleMessage(Message msg) { 1926 switch (msg.what) { 1927 case WRITE_USER_MSG: 1928 removeMessages(WRITE_USER_MSG, msg.obj); 1929 synchronized (mPackagesLock) { 1930 int userId = ((UserInfo) msg.obj).id; 1931 UserInfo userInfo = mUsers.get(userId); 1932 if (userInfo != null) { 1933 writeUserLocked(userInfo); 1934 } 1935 } 1936 } 1937 } 1938 } 1939} 1940