UserManagerService.java revision f3ece36535d4999cf2bfd2175a33da6c3cdf298e
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 serializer.endTag(null, TAG_RESTRICTIONS); 922 } 923 924 private UserInfo readUserLocked(int id) { 925 int flags = 0; 926 int serialNumber = id; 927 String name = null; 928 String iconPath = null; 929 long creationTime = 0L; 930 long lastLoggedInTime = 0L; 931 long salt = 0L; 932 String pinHash = null; 933 int failedAttempts = 0; 934 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 935 long lastAttemptTime = 0L; 936 boolean partial = false; 937 boolean guestToRemove = false; 938 Bundle restrictions = new Bundle(); 939 940 FileInputStream fis = null; 941 try { 942 AtomicFile userFile = 943 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 944 fis = userFile.openRead(); 945 XmlPullParser parser = Xml.newPullParser(); 946 parser.setInput(fis, null); 947 int type; 948 while ((type = parser.next()) != XmlPullParser.START_TAG 949 && type != XmlPullParser.END_DOCUMENT) { 950 ; 951 } 952 953 if (type != XmlPullParser.START_TAG) { 954 Slog.e(LOG_TAG, "Unable to read user " + id); 955 return null; 956 } 957 958 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 959 int storedId = readIntAttribute(parser, ATTR_ID, -1); 960 if (storedId != id) { 961 Slog.e(LOG_TAG, "User id does not match the file name"); 962 return null; 963 } 964 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 965 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 966 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 967 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 968 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 969 salt = readLongAttribute(parser, ATTR_SALT, 0L); 970 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 971 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 972 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 973 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 974 UserInfo.NO_PROFILE_GROUP_ID); 975 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 976 if ("true".equals(valueString)) { 977 partial = true; 978 } 979 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 980 if ("true".equals(valueString)) { 981 guestToRemove = true; 982 } 983 984 int outerDepth = parser.getDepth(); 985 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 986 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 987 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 988 continue; 989 } 990 String tag = parser.getName(); 991 if (TAG_NAME.equals(tag)) { 992 type = parser.next(); 993 if (type == XmlPullParser.TEXT) { 994 name = parser.getText(); 995 } 996 } else if (TAG_RESTRICTIONS.equals(tag)) { 997 readRestrictionsLocked(parser, restrictions); 998 } 999 } 1000 } 1001 1002 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1003 userInfo.serialNumber = serialNumber; 1004 userInfo.creationTime = creationTime; 1005 userInfo.lastLoggedInTime = lastLoggedInTime; 1006 userInfo.partial = partial; 1007 userInfo.guestToRemove = guestToRemove; 1008 userInfo.profileGroupId = profileGroupId; 1009 mUserRestrictions.append(id, restrictions); 1010 if (salt != 0L) { 1011 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 1012 if (pinState == null) { 1013 pinState = new RestrictionsPinState(); 1014 mRestrictionsPinStates.put(id, pinState); 1015 } 1016 pinState.salt = salt; 1017 pinState.pinHash = pinHash; 1018 pinState.failedAttempts = failedAttempts; 1019 pinState.lastAttemptTime = lastAttemptTime; 1020 } 1021 return userInfo; 1022 1023 } catch (IOException ioe) { 1024 } catch (XmlPullParserException pe) { 1025 } finally { 1026 if (fis != null) { 1027 try { 1028 fis.close(); 1029 } catch (IOException e) { 1030 } 1031 } 1032 } 1033 return null; 1034 } 1035 1036 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1037 throws IOException { 1038 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1039 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1040 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1041 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1042 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1043 readBoolean(parser, restrictions, 1044 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1045 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1046 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1047 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1048 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1049 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1050 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1051 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1052 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1053 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1054 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1055 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1056 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1057 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1058 readBoolean(parser, restrictions, 1059 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1060 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1061 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1062 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1063 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1064 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1065 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1066 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1067 readBoolean(parser, restrictions, UserManager.DISALLOW_WALLPAPER); 1068 } 1069 1070 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1071 String restrictionKey) { 1072 String value = parser.getAttributeValue(null, restrictionKey); 1073 if (value != null) { 1074 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1075 } 1076 } 1077 1078 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1079 throws IOException { 1080 if (restrictions.containsKey(restrictionKey)) { 1081 xml.attribute(null, restrictionKey, 1082 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1083 } 1084 } 1085 1086 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1087 String valueString = parser.getAttributeValue(null, attr); 1088 if (valueString == null) return defaultValue; 1089 try { 1090 return Integer.parseInt(valueString); 1091 } catch (NumberFormatException nfe) { 1092 return defaultValue; 1093 } 1094 } 1095 1096 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1097 String valueString = parser.getAttributeValue(null, attr); 1098 if (valueString == null) return defaultValue; 1099 try { 1100 return Long.parseLong(valueString); 1101 } catch (NumberFormatException nfe) { 1102 return defaultValue; 1103 } 1104 } 1105 1106 private boolean isPackageInstalled(String pkg, int userId) { 1107 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1108 PackageManager.GET_UNINSTALLED_PACKAGES, 1109 userId); 1110 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1111 return false; 1112 } 1113 return true; 1114 } 1115 1116 /** 1117 * Removes all the restrictions files (res_<packagename>) for a given user. 1118 * Does not do any permissions checking. 1119 */ 1120 private void cleanAppRestrictions(int userId) { 1121 synchronized (mPackagesLock) { 1122 File dir = Environment.getUserSystemDirectory(userId); 1123 String[] files = dir.list(); 1124 if (files == null) return; 1125 for (String fileName : files) { 1126 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1127 File resFile = new File(dir, fileName); 1128 if (resFile.exists()) { 1129 resFile.delete(); 1130 } 1131 } 1132 } 1133 } 1134 } 1135 1136 /** 1137 * Removes the app restrictions file for a specific package and user id, if it exists. 1138 */ 1139 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1140 synchronized (mPackagesLock) { 1141 File dir = Environment.getUserSystemDirectory(userId); 1142 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1143 if (resFile.exists()) { 1144 resFile.delete(); 1145 } 1146 } 1147 } 1148 1149 @Override 1150 public UserInfo createProfileForUser(String name, int flags, int userId) { 1151 checkManageUsersPermission("Only the system can create users"); 1152 if (userId != UserHandle.USER_OWNER) { 1153 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1154 return null; 1155 } 1156 return createUserInternal(name, flags, userId); 1157 } 1158 1159 @Override 1160 public UserInfo createUser(String name, int flags) { 1161 checkManageUsersPermission("Only the system can create users"); 1162 return createUserInternal(name, flags, UserHandle.USER_NULL); 1163 } 1164 1165 private UserInfo createUserInternal(String name, int flags, int parentId) { 1166 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1167 UserManager.DISALLOW_ADD_USER, false)) { 1168 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1169 return null; 1170 } 1171 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1172 final long ident = Binder.clearCallingIdentity(); 1173 UserInfo userInfo = null; 1174 try { 1175 synchronized (mInstallLock) { 1176 synchronized (mPackagesLock) { 1177 UserInfo parent = null; 1178 if (parentId != UserHandle.USER_NULL) { 1179 parent = getUserInfoLocked(parentId); 1180 if (parent == null) return null; 1181 } 1182 // If we're not adding a guest user and the limit has been reached, 1183 // cannot add a user. 1184 if (!isGuest && isUserLimitReachedLocked()) { 1185 return null; 1186 } 1187 // If we're adding a guest and there already exists one, bail. 1188 if (isGuest && findCurrentGuestUserLocked() != null) { 1189 return null; 1190 } 1191 // Limit number of managed profiles that can be created 1192 if ((flags & UserInfo.FLAG_MANAGED_PROFILE) != 0 1193 && numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 1194 >= MAX_MANAGED_PROFILES) { 1195 return null; 1196 } 1197 int userId = getNextAvailableIdLocked(); 1198 userInfo = new UserInfo(userId, name, null, flags); 1199 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1200 userInfo.serialNumber = mNextSerialNumber++; 1201 long now = System.currentTimeMillis(); 1202 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1203 userInfo.partial = true; 1204 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1205 mUsers.put(userId, userInfo); 1206 writeUserListLocked(); 1207 if (parent != null) { 1208 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1209 parent.profileGroupId = parent.id; 1210 scheduleWriteUserLocked(parent); 1211 } 1212 userInfo.profileGroupId = parent.profileGroupId; 1213 } 1214 mPm.createNewUserLILPw(userId, userPath); 1215 userInfo.partial = false; 1216 scheduleWriteUserLocked(userInfo); 1217 updateUserIdsLocked(); 1218 Bundle restrictions = new Bundle(); 1219 mUserRestrictions.append(userId, restrictions); 1220 } 1221 } 1222 if (userInfo != null) { 1223 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1224 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1225 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1226 android.Manifest.permission.MANAGE_USERS); 1227 } 1228 } finally { 1229 Binder.restoreCallingIdentity(ident); 1230 } 1231 return userInfo; 1232 } 1233 1234 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1235 int count = 0; 1236 for (int i = mUsers.size() - 1; i >= 0; i--) { 1237 UserInfo user = mUsers.valueAt(i); 1238 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1239 if ((user.flags & flags) != 0) { 1240 count++; 1241 } 1242 } 1243 } 1244 return count; 1245 } 1246 1247 /** 1248 * Find the current guest user. If the Guest user is partial, 1249 * then do not include it in the results as it is about to die. 1250 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1251 * the special handling of Guests being removed. 1252 */ 1253 private UserInfo findCurrentGuestUserLocked() { 1254 final int size = mUsers.size(); 1255 for (int i = 0; i < size; i++) { 1256 final UserInfo user = mUsers.valueAt(i); 1257 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1258 return user; 1259 } 1260 } 1261 return null; 1262 } 1263 1264 /** 1265 * Mark this guest user for deletion to allow us to create another guest 1266 * and switch to that user before actually removing this guest. 1267 * @param userHandle the userid of the current guest 1268 * @return whether the user could be marked for deletion 1269 */ 1270 public boolean markGuestForDeletion(int userHandle) { 1271 checkManageUsersPermission("Only the system can remove users"); 1272 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1273 UserManager.DISALLOW_REMOVE_USER, false)) { 1274 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1275 return false; 1276 } 1277 1278 long ident = Binder.clearCallingIdentity(); 1279 try { 1280 final UserInfo user; 1281 synchronized (mPackagesLock) { 1282 user = mUsers.get(userHandle); 1283 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1284 return false; 1285 } 1286 if (!user.isGuest()) { 1287 return false; 1288 } 1289 // We set this to a guest user that is to be removed. This is a temporary state 1290 // where we are allowed to add new Guest users, even if this one is still not 1291 // removed. This user will still show up in getUserInfo() calls. 1292 // If we don't get around to removing this Guest user, it will be purged on next 1293 // startup. 1294 user.guestToRemove = true; 1295 // Mark it as disabled, so that it isn't returned any more when 1296 // profiles are queried. 1297 user.flags |= UserInfo.FLAG_DISABLED; 1298 writeUserLocked(user); 1299 } 1300 } finally { 1301 Binder.restoreCallingIdentity(ident); 1302 } 1303 return true; 1304 } 1305 1306 /** 1307 * Removes a user and all data directories created for that user. This method should be called 1308 * after the user's processes have been terminated. 1309 * @param userHandle the user's id 1310 */ 1311 public boolean removeUser(int userHandle) { 1312 checkManageUsersPermission("Only the system can remove users"); 1313 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1314 UserManager.DISALLOW_REMOVE_USER, false)) { 1315 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1316 return false; 1317 } 1318 1319 long ident = Binder.clearCallingIdentity(); 1320 try { 1321 final UserInfo user; 1322 synchronized (mPackagesLock) { 1323 user = mUsers.get(userHandle); 1324 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1325 return false; 1326 } 1327 1328 // We remember deleted user IDs to prevent them from being 1329 // reused during the current boot; they can still be reused 1330 // after a reboot. 1331 mRemovingUserIds.put(userHandle, true); 1332 1333 try { 1334 mAppOpsService.removeUser(userHandle); 1335 } catch (RemoteException e) { 1336 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1337 } 1338 // Set this to a partially created user, so that the user will be purged 1339 // on next startup, in case the runtime stops now before stopping and 1340 // removing the user completely. 1341 user.partial = true; 1342 // Mark it as disabled, so that it isn't returned any more when 1343 // profiles are queried. 1344 user.flags |= UserInfo.FLAG_DISABLED; 1345 writeUserLocked(user); 1346 } 1347 1348 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1349 && user.isManagedProfile()) { 1350 // Send broadcast to notify system that the user removed was a 1351 // managed user. 1352 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1353 } 1354 1355 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1356 int res; 1357 try { 1358 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1359 new IStopUserCallback.Stub() { 1360 @Override 1361 public void userStopped(int userId) { 1362 finishRemoveUser(userId); 1363 } 1364 @Override 1365 public void userStopAborted(int userId) { 1366 } 1367 }); 1368 } catch (RemoteException e) { 1369 return false; 1370 } 1371 return res == ActivityManager.USER_OP_SUCCESS; 1372 } finally { 1373 Binder.restoreCallingIdentity(ident); 1374 } 1375 } 1376 1377 void finishRemoveUser(final int userHandle) { 1378 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1379 // Let other services shutdown any activity and clean up their state before completely 1380 // wiping the user's system directory and removing from the user list 1381 long ident = Binder.clearCallingIdentity(); 1382 try { 1383 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1384 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1385 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1386 android.Manifest.permission.MANAGE_USERS, 1387 1388 new BroadcastReceiver() { 1389 @Override 1390 public void onReceive(Context context, Intent intent) { 1391 if (DBG) { 1392 Slog.i(LOG_TAG, 1393 "USER_REMOVED broadcast sent, cleaning up user data " 1394 + userHandle); 1395 } 1396 new Thread() { 1397 public void run() { 1398 synchronized (mInstallLock) { 1399 synchronized (mPackagesLock) { 1400 removeUserStateLocked(userHandle); 1401 } 1402 } 1403 } 1404 }.start(); 1405 } 1406 }, 1407 1408 null, Activity.RESULT_OK, null, null); 1409 } finally { 1410 Binder.restoreCallingIdentity(ident); 1411 } 1412 } 1413 1414 private void removeUserStateLocked(final int userHandle) { 1415 // Cleanup package manager settings 1416 mPm.cleanUpUserLILPw(this, userHandle); 1417 1418 // Remove this user from the list 1419 mUsers.remove(userHandle); 1420 1421 mRestrictionsPinStates.remove(userHandle); 1422 // Remove user file 1423 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1424 userFile.delete(); 1425 // Update the user list 1426 writeUserListLocked(); 1427 updateUserIdsLocked(); 1428 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1429 } 1430 1431 private void removeDirectoryRecursive(File parent) { 1432 if (parent.isDirectory()) { 1433 String[] files = parent.list(); 1434 for (String filename : files) { 1435 File child = new File(parent, filename); 1436 removeDirectoryRecursive(child); 1437 } 1438 } 1439 parent.delete(); 1440 } 1441 1442 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1443 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1444 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1445 Intent.FLAG_RECEIVER_FOREGROUND); 1446 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1447 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1448 } 1449 1450 @Override 1451 public Bundle getApplicationRestrictions(String packageName) { 1452 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1453 } 1454 1455 @Override 1456 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1457 if (UserHandle.getCallingUserId() != userId 1458 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1459 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1460 } 1461 synchronized (mPackagesLock) { 1462 // Read the restrictions from XML 1463 return readApplicationRestrictionsLocked(packageName, userId); 1464 } 1465 } 1466 1467 @Override 1468 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1469 int userId) { 1470 if (UserHandle.getCallingUserId() != userId 1471 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1472 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1473 } 1474 synchronized (mPackagesLock) { 1475 if (restrictions == null || restrictions.isEmpty()) { 1476 cleanAppRestrictionsForPackage(packageName, userId); 1477 } else { 1478 // Write the restrictions to XML 1479 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1480 } 1481 } 1482 1483 if (isPackageInstalled(packageName, userId)) { 1484 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1485 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1486 changeIntent.setPackage(packageName); 1487 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1488 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1489 } 1490 } 1491 1492 @Override 1493 public boolean setRestrictionsChallenge(String newPin) { 1494 checkManageUsersPermission("Only system can modify the restrictions pin"); 1495 int userId = UserHandle.getCallingUserId(); 1496 synchronized (mPackagesLock) { 1497 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1498 if (pinState == null) { 1499 pinState = new RestrictionsPinState(); 1500 } 1501 if (newPin == null) { 1502 pinState.salt = 0; 1503 pinState.pinHash = null; 1504 } else { 1505 try { 1506 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1507 } catch (NoSuchAlgorithmException e) { 1508 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1509 } 1510 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1511 pinState.failedAttempts = 0; 1512 } 1513 mRestrictionsPinStates.put(userId, pinState); 1514 writeUserLocked(mUsers.get(userId)); 1515 } 1516 return true; 1517 } 1518 1519 @Override 1520 public int checkRestrictionsChallenge(String pin) { 1521 checkManageUsersPermission("Only system can verify the restrictions pin"); 1522 int userId = UserHandle.getCallingUserId(); 1523 synchronized (mPackagesLock) { 1524 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1525 // If there's no pin set, return error code 1526 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1527 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1528 } else if (pin == null) { 1529 // If just checking if user can be prompted, return remaining time 1530 int waitTime = getRemainingTimeForPinAttempt(pinState); 1531 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1532 return waitTime; 1533 } else { 1534 int waitTime = getRemainingTimeForPinAttempt(pinState); 1535 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1536 if (waitTime > 0) { 1537 return waitTime; 1538 } 1539 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1540 pinState.failedAttempts = 0; 1541 scheduleWriteUserLocked(mUsers.get(userId)); 1542 return UserManager.PIN_VERIFICATION_SUCCESS; 1543 } else { 1544 pinState.failedAttempts++; 1545 pinState.lastAttemptTime = System.currentTimeMillis(); 1546 scheduleWriteUserLocked(mUsers.get(userId)); 1547 return waitTime; 1548 } 1549 } 1550 } 1551 } 1552 1553 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1554 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1555 BACKOFF_TIMES.length - 1); 1556 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1557 BACKOFF_TIMES[backoffIndex] : 0; 1558 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1559 0); 1560 } 1561 1562 @Override 1563 public boolean hasRestrictionsChallenge() { 1564 int userId = UserHandle.getCallingUserId(); 1565 synchronized (mPackagesLock) { 1566 return hasRestrictionsPinLocked(userId); 1567 } 1568 } 1569 1570 private boolean hasRestrictionsPinLocked(int userId) { 1571 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1572 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1573 return false; 1574 } 1575 return true; 1576 } 1577 1578 @Override 1579 public void removeRestrictions() { 1580 checkManageUsersPermission("Only system can remove restrictions"); 1581 final int userHandle = UserHandle.getCallingUserId(); 1582 removeRestrictionsForUser(userHandle, true); 1583 } 1584 1585 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1586 synchronized (mPackagesLock) { 1587 // Remove all user restrictions 1588 setUserRestrictions(new Bundle(), userHandle); 1589 // Remove restrictions pin 1590 setRestrictionsChallenge(null); 1591 // Remove any app restrictions 1592 cleanAppRestrictions(userHandle); 1593 } 1594 if (unhideApps) { 1595 unhideAllInstalledAppsForUser(userHandle); 1596 } 1597 } 1598 1599 private void unhideAllInstalledAppsForUser(final int userHandle) { 1600 mHandler.post(new Runnable() { 1601 @Override 1602 public void run() { 1603 List<ApplicationInfo> apps = 1604 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1605 userHandle).getList(); 1606 final long ident = Binder.clearCallingIdentity(); 1607 try { 1608 for (ApplicationInfo appInfo : apps) { 1609 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1610 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1611 != 0) { 1612 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1613 userHandle); 1614 } 1615 } 1616 } finally { 1617 Binder.restoreCallingIdentity(ident); 1618 } 1619 } 1620 }); 1621 } 1622 1623 /* 1624 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1625 * Not the most secure, but it is at least a second level of protection. First level is that 1626 * the file is in a location only readable by the system process. 1627 * @param password the password. 1628 * @param salt the randomly generated salt 1629 * @return the hash of the pattern in a String. 1630 */ 1631 private String passwordToHash(String password, long salt) { 1632 if (password == null) { 1633 return null; 1634 } 1635 String algo = null; 1636 String hashed = salt + password; 1637 try { 1638 byte[] saltedPassword = (password + salt).getBytes(); 1639 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1640 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1641 hashed = toHex(sha1) + toHex(md5); 1642 } catch (NoSuchAlgorithmException e) { 1643 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1644 } 1645 return hashed; 1646 } 1647 1648 private static String toHex(byte[] ary) { 1649 final String hex = "0123456789ABCDEF"; 1650 String ret = ""; 1651 for (int i = 0; i < ary.length; i++) { 1652 ret += hex.charAt((ary[i] >> 4) & 0xf); 1653 ret += hex.charAt(ary[i] & 0xf); 1654 } 1655 return ret; 1656 } 1657 1658 private int getUidForPackage(String packageName) { 1659 long ident = Binder.clearCallingIdentity(); 1660 try { 1661 return mContext.getPackageManager().getApplicationInfo(packageName, 1662 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1663 } catch (NameNotFoundException nnfe) { 1664 return -1; 1665 } finally { 1666 Binder.restoreCallingIdentity(ident); 1667 } 1668 } 1669 1670 private Bundle readApplicationRestrictionsLocked(String packageName, 1671 int userId) { 1672 final Bundle restrictions = new Bundle(); 1673 final ArrayList<String> values = new ArrayList<String>(); 1674 1675 FileInputStream fis = null; 1676 try { 1677 AtomicFile restrictionsFile = 1678 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1679 packageToRestrictionsFileName(packageName))); 1680 fis = restrictionsFile.openRead(); 1681 XmlPullParser parser = Xml.newPullParser(); 1682 parser.setInput(fis, null); 1683 int type; 1684 while ((type = parser.next()) != XmlPullParser.START_TAG 1685 && type != XmlPullParser.END_DOCUMENT) { 1686 ; 1687 } 1688 1689 if (type != XmlPullParser.START_TAG) { 1690 Slog.e(LOG_TAG, "Unable to read restrictions file " 1691 + restrictionsFile.getBaseFile()); 1692 return restrictions; 1693 } 1694 1695 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1696 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1697 String key = parser.getAttributeValue(null, ATTR_KEY); 1698 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1699 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1700 if (multiple != null) { 1701 values.clear(); 1702 int count = Integer.parseInt(multiple); 1703 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1704 if (type == XmlPullParser.START_TAG 1705 && parser.getName().equals(TAG_VALUE)) { 1706 values.add(parser.nextText().trim()); 1707 count--; 1708 } 1709 } 1710 String [] valueStrings = new String[values.size()]; 1711 values.toArray(valueStrings); 1712 restrictions.putStringArray(key, valueStrings); 1713 } else { 1714 String value = parser.nextText().trim(); 1715 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1716 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1717 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1718 restrictions.putInt(key, Integer.parseInt(value)); 1719 } else { 1720 restrictions.putString(key, value); 1721 } 1722 } 1723 } 1724 } 1725 } catch (IOException ioe) { 1726 } catch (XmlPullParserException pe) { 1727 } finally { 1728 if (fis != null) { 1729 try { 1730 fis.close(); 1731 } catch (IOException e) { 1732 } 1733 } 1734 } 1735 return restrictions; 1736 } 1737 1738 private void writeApplicationRestrictionsLocked(String packageName, 1739 Bundle restrictions, int userId) { 1740 FileOutputStream fos = null; 1741 AtomicFile restrictionsFile = new AtomicFile( 1742 new File(Environment.getUserSystemDirectory(userId), 1743 packageToRestrictionsFileName(packageName))); 1744 try { 1745 fos = restrictionsFile.startWrite(); 1746 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1747 1748 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1749 final XmlSerializer serializer = new FastXmlSerializer(); 1750 serializer.setOutput(bos, "utf-8"); 1751 serializer.startDocument(null, true); 1752 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1753 1754 serializer.startTag(null, TAG_RESTRICTIONS); 1755 1756 for (String key : restrictions.keySet()) { 1757 Object value = restrictions.get(key); 1758 serializer.startTag(null, TAG_ENTRY); 1759 serializer.attribute(null, ATTR_KEY, key); 1760 1761 if (value instanceof Boolean) { 1762 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1763 serializer.text(value.toString()); 1764 } else if (value instanceof Integer) { 1765 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1766 serializer.text(value.toString()); 1767 } else if (value == null || value instanceof String) { 1768 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1769 serializer.text(value != null ? (String) value : ""); 1770 } else { 1771 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1772 String[] values = (String[]) value; 1773 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1774 for (String choice : values) { 1775 serializer.startTag(null, TAG_VALUE); 1776 serializer.text(choice != null ? choice : ""); 1777 serializer.endTag(null, TAG_VALUE); 1778 } 1779 } 1780 serializer.endTag(null, TAG_ENTRY); 1781 } 1782 1783 serializer.endTag(null, TAG_RESTRICTIONS); 1784 1785 serializer.endDocument(); 1786 restrictionsFile.finishWrite(fos); 1787 } catch (Exception e) { 1788 restrictionsFile.failWrite(fos); 1789 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1790 } 1791 } 1792 1793 @Override 1794 public int getUserSerialNumber(int userHandle) { 1795 synchronized (mPackagesLock) { 1796 if (!exists(userHandle)) return -1; 1797 return getUserInfoLocked(userHandle).serialNumber; 1798 } 1799 } 1800 1801 @Override 1802 public int getUserHandle(int userSerialNumber) { 1803 synchronized (mPackagesLock) { 1804 for (int userId : mUserIds) { 1805 UserInfo info = getUserInfoLocked(userId); 1806 if (info != null && info.serialNumber == userSerialNumber) return userId; 1807 } 1808 // Not found 1809 return -1; 1810 } 1811 } 1812 1813 /** 1814 * Caches the list of user ids in an array, adjusting the array size when necessary. 1815 */ 1816 private void updateUserIdsLocked() { 1817 int num = 0; 1818 for (int i = 0; i < mUsers.size(); i++) { 1819 if (!mUsers.valueAt(i).partial) { 1820 num++; 1821 } 1822 } 1823 final int[] newUsers = new int[num]; 1824 int n = 0; 1825 for (int i = 0; i < mUsers.size(); i++) { 1826 if (!mUsers.valueAt(i).partial) { 1827 newUsers[n++] = mUsers.keyAt(i); 1828 } 1829 } 1830 mUserIds = newUsers; 1831 } 1832 1833 /** 1834 * Make a note of the last started time of a user and do some cleanup. 1835 * @param userId the user that was just foregrounded 1836 */ 1837 public void userForeground(int userId) { 1838 synchronized (mPackagesLock) { 1839 UserInfo user = mUsers.get(userId); 1840 long now = System.currentTimeMillis(); 1841 if (user == null || user.partial) { 1842 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1843 return; 1844 } 1845 if (now > EPOCH_PLUS_30_YEARS) { 1846 user.lastLoggedInTime = now; 1847 scheduleWriteUserLocked(user); 1848 } 1849 } 1850 } 1851 1852 /** 1853 * Returns the next available user id, filling in any holes in the ids. 1854 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1855 * for data and battery stats collection, or unexpected cross-talk. 1856 * @return 1857 */ 1858 private int getNextAvailableIdLocked() { 1859 synchronized (mPackagesLock) { 1860 int i = MIN_USER_ID; 1861 while (i < Integer.MAX_VALUE) { 1862 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1863 break; 1864 } 1865 i++; 1866 } 1867 return i; 1868 } 1869 } 1870 1871 private String packageToRestrictionsFileName(String packageName) { 1872 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1873 } 1874 1875 private String restrictionsFileNameToPackage(String fileName) { 1876 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1877 (int) (fileName.length() - XML_SUFFIX.length())); 1878 } 1879 1880 @Override 1881 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1882 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1883 != PackageManager.PERMISSION_GRANTED) { 1884 pw.println("Permission Denial: can't dump UserManager from from pid=" 1885 + Binder.getCallingPid() 1886 + ", uid=" + Binder.getCallingUid() 1887 + " without permission " 1888 + android.Manifest.permission.DUMP); 1889 return; 1890 } 1891 1892 long now = System.currentTimeMillis(); 1893 StringBuilder sb = new StringBuilder(); 1894 synchronized (mPackagesLock) { 1895 pw.println("Users:"); 1896 for (int i = 0; i < mUsers.size(); i++) { 1897 UserInfo user = mUsers.valueAt(i); 1898 if (user == null) continue; 1899 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1900 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1901 if (user.partial) pw.print(" <partial>"); 1902 pw.println(); 1903 pw.print(" Created: "); 1904 if (user.creationTime == 0) { 1905 pw.println("<unknown>"); 1906 } else { 1907 sb.setLength(0); 1908 TimeUtils.formatDuration(now - user.creationTime, sb); 1909 sb.append(" ago"); 1910 pw.println(sb); 1911 } 1912 pw.print(" Last logged in: "); 1913 if (user.lastLoggedInTime == 0) { 1914 pw.println("<unknown>"); 1915 } else { 1916 sb.setLength(0); 1917 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1918 sb.append(" ago"); 1919 pw.println(sb); 1920 } 1921 } 1922 } 1923 } 1924 1925 final class MainHandler extends Handler { 1926 1927 @Override 1928 public void handleMessage(Message msg) { 1929 switch (msg.what) { 1930 case WRITE_USER_MSG: 1931 removeMessages(WRITE_USER_MSG, msg.obj); 1932 synchronized (mPackagesLock) { 1933 int userId = ((UserInfo) msg.obj).id; 1934 UserInfo userInfo = mUsers.get(userId); 1935 if (userInfo != null) { 1936 writeUserLocked(userInfo); 1937 } 1938 } 1939 } 1940 } 1941 } 1942} 1943