UserManagerService.java revision eddeb49a734a524347587e7654025c489fb6331e
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.pm; 18 19import static android.text.format.DateUtils.MINUTE_IN_MILLIS; 20 21import android.app.Activity; 22import android.app.ActivityManager; 23import android.app.ActivityManagerNative; 24import android.app.IStopUserCallback; 25import android.content.BroadcastReceiver; 26import android.content.Context; 27import android.content.Intent; 28import android.content.pm.ApplicationInfo; 29import android.content.pm.PackageManager; 30import android.content.pm.PackageManager.NameNotFoundException; 31import android.content.pm.UserInfo; 32import android.graphics.Bitmap; 33import android.graphics.BitmapFactory; 34import android.os.Binder; 35import android.os.Bundle; 36import android.os.Environment; 37import android.os.FileUtils; 38import android.os.Handler; 39import android.os.IUserManager; 40import android.os.Process; 41import android.os.RemoteException; 42import android.os.ServiceManager; 43import android.os.UserHandle; 44import android.os.UserManager; 45import android.util.AtomicFile; 46import android.util.Log; 47import android.util.Slog; 48import android.util.SparseArray; 49import android.util.SparseBooleanArray; 50import android.util.TimeUtils; 51import android.util.Xml; 52 53import com.android.internal.app.IAppOpsService; 54import com.android.internal.util.ArrayUtils; 55import com.android.internal.util.FastXmlSerializer; 56 57import org.xmlpull.v1.XmlPullParser; 58import org.xmlpull.v1.XmlPullParserException; 59import org.xmlpull.v1.XmlSerializer; 60 61import java.io.BufferedOutputStream; 62import java.io.File; 63import java.io.FileDescriptor; 64import java.io.FileInputStream; 65import java.io.FileNotFoundException; 66import java.io.FileOutputStream; 67import java.io.IOException; 68import java.io.PrintWriter; 69import java.security.MessageDigest; 70import java.security.NoSuchAlgorithmException; 71import java.security.SecureRandom; 72import java.util.ArrayList; 73import java.util.List; 74 75public class UserManagerService extends IUserManager.Stub { 76 77 private static final String LOG_TAG = "UserManagerService"; 78 79 private static final boolean DBG = false; 80 81 private static final String TAG_NAME = "name"; 82 private static final String ATTR_FLAGS = "flags"; 83 private static final String ATTR_ICON_PATH = "icon"; 84 private static final String ATTR_ID = "id"; 85 private static final String ATTR_CREATION_TIME = "created"; 86 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 87 private static final String ATTR_SALT = "salt"; 88 private static final String ATTR_PIN_HASH = "pinHash"; 89 private static final String ATTR_FAILED_ATTEMPTS = "failedAttempts"; 90 private static final String ATTR_LAST_RETRY_MS = "lastAttemptMs"; 91 private static final String ATTR_SERIAL_NO = "serialNumber"; 92 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 93 private static final String ATTR_PARTIAL = "partial"; 94 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 95 private static final String ATTR_USER_VERSION = "version"; 96 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 97 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 98 private static final String TAG_USERS = "users"; 99 private static final String TAG_USER = "user"; 100 private static final String TAG_RESTRICTIONS = "restrictions"; 101 private static final String TAG_ENTRY = "entry"; 102 private static final String TAG_VALUE = "value"; 103 private static final String ATTR_KEY = "key"; 104 private static final String ATTR_VALUE_TYPE = "type"; 105 private static final String ATTR_MULTIPLE = "m"; 106 107 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 108 private static final String ATTR_TYPE_STRING = "s"; 109 private static final String ATTR_TYPE_BOOLEAN = "b"; 110 private static final String ATTR_TYPE_INTEGER = "i"; 111 112 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 113 private static final String USER_LIST_FILENAME = "userlist.xml"; 114 private static final String USER_PHOTO_FILENAME = "photo.png"; 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 = 4; 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 }; 135 136 137 private final Context mContext; 138 private final PackageManagerService mPm; 139 private final Object mInstallLock; 140 private final Object mPackagesLock; 141 142 private final Handler mHandler; 143 144 private final File mUsersDir; 145 private final File mUserListFile; 146 private final File mBaseUserPath; 147 148 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 149 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 150 private final Bundle mGuestRestrictions = new Bundle(); 151 152 class RestrictionsPinState { 153 long salt; 154 String pinHash; 155 int failedAttempts; 156 long lastAttemptTime; 157 } 158 159 private final SparseArray<RestrictionsPinState> mRestrictionsPinStates = 160 new SparseArray<RestrictionsPinState>(); 161 162 /** 163 * Set of user IDs being actively removed. Removed IDs linger in this set 164 * for several seconds to work around a VFS caching issue. 165 */ 166 // @GuardedBy("mPackagesLock") 167 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 168 169 private int[] mUserIds; 170 private int mNextSerialNumber; 171 private int mUserVersion = 0; 172 173 private IAppOpsService mAppOpsService; 174 175 private static UserManagerService sInstance; 176 177 public static UserManagerService getInstance() { 178 synchronized (UserManagerService.class) { 179 return sInstance; 180 } 181 } 182 183 /** 184 * Available for testing purposes. 185 */ 186 UserManagerService(File dataDir, File baseUserPath) { 187 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 188 } 189 190 /** 191 * Called by package manager to create the service. This is closely 192 * associated with the package manager, and the given lock is the 193 * package manager's own lock. 194 */ 195 UserManagerService(Context context, PackageManagerService pm, 196 Object installLock, Object packagesLock) { 197 this(context, pm, installLock, packagesLock, 198 Environment.getDataDirectory(), 199 new File(Environment.getDataDirectory(), "user")); 200 } 201 202 /** 203 * Available for testing purposes. 204 */ 205 private UserManagerService(Context context, PackageManagerService pm, 206 Object installLock, Object packagesLock, 207 File dataDir, File baseUserPath) { 208 mContext = context; 209 mPm = pm; 210 mInstallLock = installLock; 211 mPackagesLock = packagesLock; 212 mHandler = new Handler(); 213 synchronized (mInstallLock) { 214 synchronized (mPackagesLock) { 215 mUsersDir = new File(dataDir, USER_INFO_DIR); 216 mUsersDir.mkdirs(); 217 // Make zeroth user directory, for services to migrate their files to that location 218 File userZeroDir = new File(mUsersDir, "0"); 219 userZeroDir.mkdirs(); 220 mBaseUserPath = baseUserPath; 221 FileUtils.setPermissions(mUsersDir.toString(), 222 FileUtils.S_IRWXU|FileUtils.S_IRWXG 223 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 224 -1, -1); 225 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 226 readUserListLocked(); 227 // Prune out any partially created/partially removed users. 228 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 229 for (int i = 0; i < mUsers.size(); i++) { 230 UserInfo ui = mUsers.valueAt(i); 231 if ((ui.partial || ui.guestToRemove) && i != 0) { 232 partials.add(ui); 233 } 234 } 235 for (int i = 0; i < partials.size(); i++) { 236 UserInfo ui = partials.get(i); 237 Slog.w(LOG_TAG, "Removing partially created user #" + i 238 + " (name=" + ui.name + ")"); 239 removeUserStateLocked(ui.id); 240 } 241 sInstance = this; 242 } 243 } 244 } 245 246 void systemReady() { 247 userForeground(UserHandle.USER_OWNER); 248 mAppOpsService = IAppOpsService.Stub.asInterface( 249 ServiceManager.getService(Context.APP_OPS_SERVICE)); 250 for (int i = 0; i < mUserIds.length; ++i) { 251 try { 252 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 253 } catch (RemoteException e) { 254 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 255 } 256 } 257 } 258 259 @Override 260 public List<UserInfo> getUsers(boolean excludeDying) { 261 checkManageUsersPermission("query users"); 262 synchronized (mPackagesLock) { 263 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 264 for (int i = 0; i < mUsers.size(); i++) { 265 UserInfo ui = mUsers.valueAt(i); 266 if (ui.partial) { 267 continue; 268 } 269 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 270 users.add(ui); 271 } 272 } 273 return users; 274 } 275 } 276 277 @Override 278 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 279 if (userId != UserHandle.getCallingUserId()) { 280 checkManageUsersPermission("getting profiles related to user " + userId); 281 } 282 final long ident = Binder.clearCallingIdentity(); 283 try { 284 synchronized (mPackagesLock) { 285 return getProfilesLocked(userId, enabledOnly); 286 } 287 } finally { 288 Binder.restoreCallingIdentity(ident); 289 } 290 } 291 292 /** Assume permissions already checked and caller's identity cleared */ 293 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 294 UserInfo user = getUserInfoLocked(userId); 295 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 296 if (user == null) { 297 // Probably a dying user 298 return users; 299 } 300 for (int i = 0; i < mUsers.size(); i++) { 301 UserInfo profile = mUsers.valueAt(i); 302 if (!isProfileOf(user, profile)) { 303 continue; 304 } 305 if (enabledOnly && !profile.isEnabled()) { 306 continue; 307 } 308 if (mRemovingUserIds.get(profile.id)) { 309 continue; 310 } 311 users.add(profile); 312 } 313 return users; 314 } 315 316 @Override 317 public UserInfo getProfileParent(int userHandle) { 318 checkManageUsersPermission("get the profile parent"); 319 synchronized (mPackagesLock) { 320 UserInfo profile = getUserInfoLocked(userHandle); 321 int parentUserId = profile.profileGroupId; 322 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 323 return null; 324 } else { 325 return getUserInfoLocked(parentUserId); 326 } 327 } 328 } 329 330 private boolean isProfileOf(UserInfo user, UserInfo profile) { 331 return user.id == profile.id || 332 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 333 && user.profileGroupId == profile.profileGroupId); 334 } 335 336 @Override 337 public void setUserEnabled(int userId) { 338 checkManageUsersPermission("enable user"); 339 synchronized (mPackagesLock) { 340 UserInfo info = getUserInfoLocked(userId); 341 if (info != null && !info.isEnabled()) { 342 info.flags ^= UserInfo.FLAG_DISABLED; 343 writeUserLocked(info); 344 } 345 } 346 } 347 348 @Override 349 public UserInfo getUserInfo(int userId) { 350 checkManageUsersPermission("query user"); 351 synchronized (mPackagesLock) { 352 return getUserInfoLocked(userId); 353 } 354 } 355 356 @Override 357 public boolean isRestricted() { 358 synchronized (mPackagesLock) { 359 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 360 } 361 } 362 363 /* 364 * Should be locked on mUsers before calling this. 365 */ 366 private UserInfo getUserInfoLocked(int userId) { 367 UserInfo ui = mUsers.get(userId); 368 // If it is partial and not in the process of being removed, return as unknown user. 369 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 370 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 371 return null; 372 } 373 return ui; 374 } 375 376 public boolean exists(int userId) { 377 synchronized (mPackagesLock) { 378 return ArrayUtils.contains(mUserIds, userId); 379 } 380 } 381 382 @Override 383 public void setUserName(int userId, String name) { 384 checkManageUsersPermission("rename users"); 385 boolean changed = false; 386 synchronized (mPackagesLock) { 387 UserInfo info = mUsers.get(userId); 388 if (info == null || info.partial) { 389 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 390 return; 391 } 392 if (name != null && !name.equals(info.name)) { 393 info.name = name; 394 writeUserLocked(info); 395 changed = true; 396 } 397 } 398 if (changed) { 399 sendUserInfoChangedBroadcast(userId); 400 } 401 } 402 403 @Override 404 public void setUserIcon(int userId, Bitmap bitmap) { 405 checkManageUsersPermission("update users"); 406 long ident = Binder.clearCallingIdentity(); 407 try { 408 synchronized (mPackagesLock) { 409 UserInfo info = mUsers.get(userId); 410 if (info == null || info.partial) { 411 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 412 return; 413 } 414 writeBitmapLocked(info, bitmap); 415 writeUserLocked(info); 416 } 417 sendUserInfoChangedBroadcast(userId); 418 } finally { 419 Binder.restoreCallingIdentity(ident); 420 } 421 } 422 423 private void sendUserInfoChangedBroadcast(int userId) { 424 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 425 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 426 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 427 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 428 } 429 430 @Override 431 public Bitmap getUserIcon(int userId) { 432 synchronized (mPackagesLock) { 433 UserInfo info = mUsers.get(userId); 434 if (info == null || info.partial) { 435 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 436 return null; 437 } 438 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 439 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 440 || callingGroupId != info.profileGroupId) { 441 checkManageUsersPermission("get the icon of a user who is not related"); 442 } 443 if (info.iconPath == null) { 444 return null; 445 } 446 return BitmapFactory.decodeFile(info.iconPath); 447 } 448 } 449 450 public void makeInitialized(int userId) { 451 checkManageUsersPermission("makeInitialized"); 452 synchronized (mPackagesLock) { 453 UserInfo info = mUsers.get(userId); 454 if (info == null || info.partial) { 455 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 456 } 457 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 458 info.flags |= UserInfo.FLAG_INITIALIZED; 459 writeUserLocked(info); 460 } 461 } 462 } 463 464 @Override 465 public Bundle getDefaultGuestRestrictions() { 466 checkManageUsersPermission("getDefaultGuestRestrictions"); 467 synchronized (mPackagesLock) { 468 return new Bundle(mGuestRestrictions); 469 } 470 } 471 472 @Override 473 public void setDefaultGuestRestrictions(Bundle restrictions) { 474 checkManageUsersPermission("setDefaultGuestRestrictions"); 475 synchronized (mPackagesLock) { 476 mGuestRestrictions.clear(); 477 mGuestRestrictions.putAll(restrictions); 478 writeUserListLocked(); 479 } 480 } 481 482 @Override 483 public Bundle getUserRestrictions(int userId) { 484 // checkManageUsersPermission("getUserRestrictions"); 485 486 synchronized (mPackagesLock) { 487 Bundle restrictions = mUserRestrictions.get(userId); 488 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 489 } 490 } 491 492 @Override 493 public void setUserRestrictions(Bundle restrictions, int userId) { 494 checkManageUsersPermission("setUserRestrictions"); 495 if (restrictions == null) return; 496 497 synchronized (mPackagesLock) { 498 mUserRestrictions.get(userId).clear(); 499 mUserRestrictions.get(userId).putAll(restrictions); 500 long token = Binder.clearCallingIdentity(); 501 try { 502 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 503 } catch (RemoteException e) { 504 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 505 } finally { 506 Binder.restoreCallingIdentity(token); 507 } 508 writeUserLocked(mUsers.get(userId)); 509 } 510 } 511 512 /** 513 * Check if we've hit the limit of how many users can be created. 514 */ 515 private boolean isUserLimitReachedLocked() { 516 int aliveUserCount = 0; 517 final int totalUserCount = mUsers.size(); 518 // Skip over users being removed 519 for (int i = 0; i < totalUserCount; i++) { 520 UserInfo user = mUsers.valueAt(i); 521 if (!mRemovingUserIds.get(user.id) 522 && !user.isGuest() && !user.partial) { 523 aliveUserCount++; 524 } 525 } 526 return aliveUserCount >= UserManager.getMaxSupportedUsers(); 527 } 528 529 /** 530 * Enforces that only the system UID or root's UID or apps that have the 531 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 532 * permission can make certain calls to the UserManager. 533 * 534 * @param message used as message if SecurityException is thrown 535 * @throws SecurityException if the caller is not system or root 536 */ 537 private static final void checkManageUsersPermission(String message) { 538 final int uid = Binder.getCallingUid(); 539 if (uid != Process.SYSTEM_UID && uid != 0 540 && ActivityManager.checkComponentPermission( 541 android.Manifest.permission.MANAGE_USERS, 542 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 543 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 544 } 545 } 546 547 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 548 try { 549 File dir = new File(mUsersDir, Integer.toString(info.id)); 550 File file = new File(dir, USER_PHOTO_FILENAME); 551 if (!dir.exists()) { 552 dir.mkdir(); 553 FileUtils.setPermissions( 554 dir.getPath(), 555 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 556 -1, -1); 557 } 558 FileOutputStream os; 559 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 560 info.iconPath = file.getAbsolutePath(); 561 } 562 try { 563 os.close(); 564 } catch (IOException ioe) { 565 // What the ... ! 566 } 567 } catch (FileNotFoundException e) { 568 Slog.w(LOG_TAG, "Error setting photo for user ", e); 569 } 570 } 571 572 /** 573 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 574 * cache it elsewhere. 575 * @return the array of user ids. 576 */ 577 public int[] getUserIds() { 578 synchronized (mPackagesLock) { 579 return mUserIds; 580 } 581 } 582 583 int[] getUserIdsLPr() { 584 return mUserIds; 585 } 586 587 private void readUserListLocked() { 588 if (!mUserListFile.exists()) { 589 fallbackToSingleUserLocked(); 590 return; 591 } 592 FileInputStream fis = null; 593 AtomicFile userListFile = new AtomicFile(mUserListFile); 594 try { 595 fis = userListFile.openRead(); 596 XmlPullParser parser = Xml.newPullParser(); 597 parser.setInput(fis, null); 598 int type; 599 while ((type = parser.next()) != XmlPullParser.START_TAG 600 && type != XmlPullParser.END_DOCUMENT) { 601 ; 602 } 603 604 if (type != XmlPullParser.START_TAG) { 605 Slog.e(LOG_TAG, "Unable to read user list"); 606 fallbackToSingleUserLocked(); 607 return; 608 } 609 610 mNextSerialNumber = -1; 611 if (parser.getName().equals(TAG_USERS)) { 612 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 613 if (lastSerialNumber != null) { 614 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 615 } 616 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 617 if (versionNumber != null) { 618 mUserVersion = Integer.parseInt(versionNumber); 619 } 620 } 621 622 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 623 if (type == XmlPullParser.START_TAG) { 624 final String name = parser.getName(); 625 if (name.equals(TAG_USER)) { 626 String id = parser.getAttributeValue(null, ATTR_ID); 627 UserInfo user = readUserLocked(Integer.parseInt(id)); 628 629 if (user != null) { 630 mUsers.put(user.id, user); 631 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 632 mNextSerialNumber = user.id + 1; 633 } 634 } 635 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 636 mGuestRestrictions.clear(); 637 readRestrictionsLocked(parser, mGuestRestrictions); 638 } 639 } 640 } 641 updateUserIdsLocked(); 642 upgradeIfNecessaryLocked(); 643 } catch (IOException ioe) { 644 fallbackToSingleUserLocked(); 645 } catch (XmlPullParserException pe) { 646 fallbackToSingleUserLocked(); 647 } finally { 648 if (fis != null) { 649 try { 650 fis.close(); 651 } catch (IOException e) { 652 } 653 } 654 } 655 } 656 657 /** 658 * Upgrade steps between versions, either for fixing bugs or changing the data format. 659 */ 660 private void upgradeIfNecessaryLocked() { 661 int userVersion = mUserVersion; 662 if (userVersion < 1) { 663 // Assign a proper name for the owner, if not initialized correctly before 664 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 665 if ("Primary".equals(user.name)) { 666 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 667 writeUserLocked(user); 668 } 669 userVersion = 1; 670 } 671 672 if (userVersion < 2) { 673 // Owner should be marked as initialized 674 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 675 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 676 user.flags |= UserInfo.FLAG_INITIALIZED; 677 writeUserLocked(user); 678 } 679 userVersion = 2; 680 } 681 682 683 if (userVersion < 4) { 684 userVersion = 4; 685 } 686 687 if (userVersion < USER_VERSION) { 688 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 689 + USER_VERSION); 690 } else { 691 mUserVersion = userVersion; 692 writeUserListLocked(); 693 } 694 } 695 696 private void fallbackToSingleUserLocked() { 697 // Create the primary user 698 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 699 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 700 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 701 mUsers.put(0, primary); 702 mNextSerialNumber = MIN_USER_ID; 703 mUserVersion = USER_VERSION; 704 705 Bundle restrictions = new Bundle(); 706 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 707 708 updateUserIdsLocked(); 709 710 writeUserListLocked(); 711 writeUserLocked(primary); 712 } 713 714 /* 715 * Writes the user file in this format: 716 * 717 * <user flags="20039023" id="0"> 718 * <name>Primary</name> 719 * </user> 720 */ 721 private void writeUserLocked(UserInfo userInfo) { 722 FileOutputStream fos = null; 723 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 724 try { 725 fos = userFile.startWrite(); 726 final BufferedOutputStream bos = new BufferedOutputStream(fos); 727 728 // XmlSerializer serializer = XmlUtils.serializerInstance(); 729 final XmlSerializer serializer = new FastXmlSerializer(); 730 serializer.setOutput(bos, "utf-8"); 731 serializer.startDocument(null, true); 732 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 733 734 serializer.startTag(null, TAG_USER); 735 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 736 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 737 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 738 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 739 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 740 Long.toString(userInfo.lastLoggedInTime)); 741 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 742 if (pinState != null) { 743 if (pinState.salt != 0) { 744 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 745 } 746 if (pinState.pinHash != null) { 747 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 748 } 749 if (pinState.failedAttempts != 0) { 750 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 751 Integer.toString(pinState.failedAttempts)); 752 serializer.attribute(null, ATTR_LAST_RETRY_MS, 753 Long.toString(pinState.lastAttemptTime)); 754 } 755 } 756 if (userInfo.iconPath != null) { 757 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 758 } 759 if (userInfo.partial) { 760 serializer.attribute(null, ATTR_PARTIAL, "true"); 761 } 762 if (userInfo.guestToRemove) { 763 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 764 } 765 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 766 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 767 Integer.toString(userInfo.profileGroupId)); 768 } 769 770 serializer.startTag(null, TAG_NAME); 771 serializer.text(userInfo.name); 772 serializer.endTag(null, TAG_NAME); 773 Bundle restrictions = mUserRestrictions.get(userInfo.id); 774 if (restrictions != null) { 775 writeRestrictionsLocked(serializer, restrictions); 776 } 777 serializer.endTag(null, TAG_USER); 778 779 serializer.endDocument(); 780 userFile.finishWrite(fos); 781 } catch (Exception ioe) { 782 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 783 userFile.failWrite(fos); 784 } 785 } 786 787 /* 788 * Writes the user list file in this format: 789 * 790 * <users nextSerialNumber="3"> 791 * <user id="0"></user> 792 * <user id="2"></user> 793 * </users> 794 */ 795 private void writeUserListLocked() { 796 FileOutputStream fos = null; 797 AtomicFile userListFile = new AtomicFile(mUserListFile); 798 try { 799 fos = userListFile.startWrite(); 800 final BufferedOutputStream bos = new BufferedOutputStream(fos); 801 802 // XmlSerializer serializer = XmlUtils.serializerInstance(); 803 final XmlSerializer serializer = new FastXmlSerializer(); 804 serializer.setOutput(bos, "utf-8"); 805 serializer.startDocument(null, true); 806 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 807 808 serializer.startTag(null, TAG_USERS); 809 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 810 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 811 812 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 813 writeRestrictionsLocked(serializer, mGuestRestrictions); 814 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 815 for (int i = 0; i < mUsers.size(); i++) { 816 UserInfo user = mUsers.valueAt(i); 817 serializer.startTag(null, TAG_USER); 818 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 819 serializer.endTag(null, TAG_USER); 820 } 821 822 serializer.endTag(null, TAG_USERS); 823 824 serializer.endDocument(); 825 userListFile.finishWrite(fos); 826 } catch (Exception e) { 827 userListFile.failWrite(fos); 828 Slog.e(LOG_TAG, "Error writing user list"); 829 } 830 } 831 832 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 833 throws IOException { 834 serializer.startTag(null, TAG_RESTRICTIONS); 835 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 836 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 837 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 838 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 839 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 840 writeBoolean(serializer, restrictions, 841 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 842 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 843 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 844 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 845 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 846 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 847 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 848 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 849 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 850 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 851 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 852 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 853 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 854 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 855 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 856 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 857 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 858 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 859 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 860 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 861 serializer.endTag(null, TAG_RESTRICTIONS); 862 } 863 864 private UserInfo readUserLocked(int id) { 865 int flags = 0; 866 int serialNumber = id; 867 String name = null; 868 String iconPath = null; 869 long creationTime = 0L; 870 long lastLoggedInTime = 0L; 871 long salt = 0L; 872 String pinHash = null; 873 int failedAttempts = 0; 874 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 875 long lastAttemptTime = 0L; 876 boolean partial = false; 877 boolean guestToRemove = false; 878 Bundle restrictions = new Bundle(); 879 880 FileInputStream fis = null; 881 try { 882 AtomicFile userFile = 883 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 884 fis = userFile.openRead(); 885 XmlPullParser parser = Xml.newPullParser(); 886 parser.setInput(fis, null); 887 int type; 888 while ((type = parser.next()) != XmlPullParser.START_TAG 889 && type != XmlPullParser.END_DOCUMENT) { 890 ; 891 } 892 893 if (type != XmlPullParser.START_TAG) { 894 Slog.e(LOG_TAG, "Unable to read user " + id); 895 return null; 896 } 897 898 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 899 int storedId = readIntAttribute(parser, ATTR_ID, -1); 900 if (storedId != id) { 901 Slog.e(LOG_TAG, "User id does not match the file name"); 902 return null; 903 } 904 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 905 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 906 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 907 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 908 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 909 salt = readLongAttribute(parser, ATTR_SALT, 0L); 910 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 911 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 912 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 913 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 914 UserInfo.NO_PROFILE_GROUP_ID); 915 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 916 // This attribute was added and renamed during development of L. 917 // TODO Remove upgrade path by 1st May 2014 918 profileGroupId = readIntAttribute(parser, "relatedGroupId", 919 UserInfo.NO_PROFILE_GROUP_ID); 920 } 921 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 922 if ("true".equals(valueString)) { 923 partial = true; 924 } 925 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 926 if ("true".equals(valueString)) { 927 guestToRemove = true; 928 } 929 930 int outerDepth = parser.getDepth(); 931 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 932 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 933 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 934 continue; 935 } 936 String tag = parser.getName(); 937 if (TAG_NAME.equals(tag)) { 938 type = parser.next(); 939 if (type == XmlPullParser.TEXT) { 940 name = parser.getText(); 941 } 942 } else if (TAG_RESTRICTIONS.equals(tag)) { 943 readRestrictionsLocked(parser, restrictions); 944 } 945 } 946 } 947 948 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 949 userInfo.serialNumber = serialNumber; 950 userInfo.creationTime = creationTime; 951 userInfo.lastLoggedInTime = lastLoggedInTime; 952 userInfo.partial = partial; 953 userInfo.guestToRemove = guestToRemove; 954 userInfo.profileGroupId = profileGroupId; 955 mUserRestrictions.append(id, restrictions); 956 if (salt != 0L) { 957 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 958 if (pinState == null) { 959 pinState = new RestrictionsPinState(); 960 mRestrictionsPinStates.put(id, pinState); 961 } 962 pinState.salt = salt; 963 pinState.pinHash = pinHash; 964 pinState.failedAttempts = failedAttempts; 965 pinState.lastAttemptTime = lastAttemptTime; 966 } 967 return userInfo; 968 969 } catch (IOException ioe) { 970 } catch (XmlPullParserException pe) { 971 } finally { 972 if (fis != null) { 973 try { 974 fis.close(); 975 } catch (IOException e) { 976 } 977 } 978 } 979 return null; 980 } 981 982 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 983 throws IOException { 984 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 985 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 986 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 987 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 988 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 989 readBoolean(parser, restrictions, 990 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 991 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 992 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 993 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 994 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 995 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 996 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 997 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 998 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 999 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1000 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1001 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1002 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1003 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1004 readBoolean(parser, restrictions, 1005 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1006 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1007 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1008 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1009 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1010 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1011 } 1012 1013 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1014 String restrictionKey) { 1015 String value = parser.getAttributeValue(null, restrictionKey); 1016 if (value != null) { 1017 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1018 } 1019 } 1020 1021 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1022 throws IOException { 1023 if (restrictions.containsKey(restrictionKey)) { 1024 xml.attribute(null, restrictionKey, 1025 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1026 } 1027 } 1028 1029 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1030 String valueString = parser.getAttributeValue(null, attr); 1031 if (valueString == null) return defaultValue; 1032 try { 1033 return Integer.parseInt(valueString); 1034 } catch (NumberFormatException nfe) { 1035 return defaultValue; 1036 } 1037 } 1038 1039 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1040 String valueString = parser.getAttributeValue(null, attr); 1041 if (valueString == null) return defaultValue; 1042 try { 1043 return Long.parseLong(valueString); 1044 } catch (NumberFormatException nfe) { 1045 return defaultValue; 1046 } 1047 } 1048 1049 private boolean isPackageInstalled(String pkg, int userId) { 1050 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1051 PackageManager.GET_UNINSTALLED_PACKAGES, 1052 userId); 1053 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1054 return false; 1055 } 1056 return true; 1057 } 1058 1059 /** 1060 * Removes all the restrictions files (res_<packagename>) for a given user. 1061 * Does not do any permissions checking. 1062 */ 1063 private void cleanAppRestrictions(int userId) { 1064 synchronized (mPackagesLock) { 1065 File dir = Environment.getUserSystemDirectory(userId); 1066 String[] files = dir.list(); 1067 if (files == null) return; 1068 for (String fileName : files) { 1069 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1070 File resFile = new File(dir, fileName); 1071 if (resFile.exists()) { 1072 resFile.delete(); 1073 } 1074 } 1075 } 1076 } 1077 } 1078 1079 /** 1080 * Removes the app restrictions file for a specific package and user id, if it exists. 1081 */ 1082 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1083 synchronized (mPackagesLock) { 1084 File dir = Environment.getUserSystemDirectory(userId); 1085 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1086 if (resFile.exists()) { 1087 resFile.delete(); 1088 } 1089 } 1090 } 1091 1092 @Override 1093 public UserInfo createProfileForUser(String name, int flags, int userId) { 1094 checkManageUsersPermission("Only the system can create users"); 1095 if (userId != UserHandle.USER_OWNER) { 1096 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1097 return null; 1098 } 1099 return createUserInternal(name, flags, userId); 1100 } 1101 1102 @Override 1103 public UserInfo createUser(String name, int flags) { 1104 checkManageUsersPermission("Only the system can create users"); 1105 return createUserInternal(name, flags, UserHandle.USER_NULL); 1106 } 1107 1108 private UserInfo createUserInternal(String name, int flags, int parentId) { 1109 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1110 UserManager.DISALLOW_ADD_USER, false)) { 1111 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1112 return null; 1113 } 1114 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1115 final long ident = Binder.clearCallingIdentity(); 1116 UserInfo userInfo = null; 1117 try { 1118 synchronized (mInstallLock) { 1119 synchronized (mPackagesLock) { 1120 UserInfo parent = null; 1121 if (parentId != UserHandle.USER_NULL) { 1122 parent = getUserInfoLocked(parentId); 1123 if (parent == null) return null; 1124 } 1125 // If we're not adding a guest user and the limit has been reached, 1126 // cannot add a user. 1127 if (!isGuest && isUserLimitReachedLocked()) { 1128 return null; 1129 } 1130 // If we're adding a guest and there already exists one, bail. 1131 if (isGuest && findCurrentGuestUserLocked() != null) { 1132 return null; 1133 } 1134 // Limit number of managed profiles that can be created 1135 if ((flags & UserInfo.FLAG_MANAGED_PROFILE) != 0 1136 && numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 1137 >= MAX_MANAGED_PROFILES) { 1138 return null; 1139 } 1140 int userId = getNextAvailableIdLocked(); 1141 userInfo = new UserInfo(userId, name, null, flags); 1142 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1143 userInfo.serialNumber = mNextSerialNumber++; 1144 long now = System.currentTimeMillis(); 1145 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1146 userInfo.partial = true; 1147 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1148 mUsers.put(userId, userInfo); 1149 writeUserListLocked(); 1150 if (parent != null) { 1151 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1152 parent.profileGroupId = parent.id; 1153 writeUserLocked(parent); 1154 } 1155 userInfo.profileGroupId = parent.profileGroupId; 1156 } 1157 writeUserLocked(userInfo); 1158 mPm.createNewUserLILPw(userId, userPath); 1159 userInfo.partial = false; 1160 writeUserLocked(userInfo); 1161 updateUserIdsLocked(); 1162 Bundle restrictions = new Bundle(); 1163 mUserRestrictions.append(userId, restrictions); 1164 } 1165 } 1166 if (userInfo != null) { 1167 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1168 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1169 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1170 android.Manifest.permission.MANAGE_USERS); 1171 } 1172 } finally { 1173 Binder.restoreCallingIdentity(ident); 1174 } 1175 return userInfo; 1176 } 1177 1178 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1179 int count = 0; 1180 for (int i = mUsers.size() - 1; i >= 0; i--) { 1181 UserInfo user = mUsers.valueAt(i); 1182 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1183 if ((user.flags & flags) != 0) { 1184 count++; 1185 } 1186 } 1187 } 1188 return count; 1189 } 1190 1191 /** 1192 * Find the current guest user. If the Guest user is partial, 1193 * then do not include it in the results as it is about to die. 1194 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1195 * the special handling of Guests being removed. 1196 */ 1197 private UserInfo findCurrentGuestUserLocked() { 1198 final int size = mUsers.size(); 1199 for (int i = 0; i < size; i++) { 1200 final UserInfo user = mUsers.valueAt(i); 1201 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1202 return user; 1203 } 1204 } 1205 return null; 1206 } 1207 1208 /** 1209 * Mark this guest user for deletion to allow us to create another guest 1210 * and switch to that user before actually removing this guest. 1211 * @param userHandle the userid of the current guest 1212 * @return whether the user could be marked for deletion 1213 */ 1214 public boolean markGuestForDeletion(int userHandle) { 1215 checkManageUsersPermission("Only the system can remove users"); 1216 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1217 UserManager.DISALLOW_REMOVE_USER, false)) { 1218 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1219 return false; 1220 } 1221 1222 long ident = Binder.clearCallingIdentity(); 1223 try { 1224 final UserInfo user; 1225 synchronized (mPackagesLock) { 1226 user = mUsers.get(userHandle); 1227 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1228 return false; 1229 } 1230 if (!user.isGuest()) { 1231 return false; 1232 } 1233 // We set this to a guest user that is to be removed. This is a temporary state 1234 // where we are allowed to add new Guest users, even if this one is still not 1235 // removed. This user will still show up in getUserInfo() calls. 1236 // If we don't get around to removing this Guest user, it will be purged on next 1237 // startup. 1238 user.guestToRemove = true; 1239 // Mark it as disabled, so that it isn't returned any more when 1240 // profiles are queried. 1241 user.flags |= UserInfo.FLAG_DISABLED; 1242 writeUserLocked(user); 1243 } 1244 } finally { 1245 Binder.restoreCallingIdentity(ident); 1246 } 1247 return true; 1248 } 1249 1250 /** 1251 * Removes a user and all data directories created for that user. This method should be called 1252 * after the user's processes have been terminated. 1253 * @param userHandle the user's id 1254 */ 1255 public boolean removeUser(int userHandle) { 1256 checkManageUsersPermission("Only the system can remove users"); 1257 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1258 UserManager.DISALLOW_REMOVE_USER, false)) { 1259 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1260 return false; 1261 } 1262 1263 long ident = Binder.clearCallingIdentity(); 1264 try { 1265 final UserInfo user; 1266 synchronized (mPackagesLock) { 1267 user = mUsers.get(userHandle); 1268 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1269 return false; 1270 } 1271 mRemovingUserIds.put(userHandle, true); 1272 try { 1273 mAppOpsService.removeUser(userHandle); 1274 } catch (RemoteException e) { 1275 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1276 } 1277 // Set this to a partially created user, so that the user will be purged 1278 // on next startup, in case the runtime stops now before stopping and 1279 // removing the user completely. 1280 user.partial = true; 1281 // Mark it as disabled, so that it isn't returned any more when 1282 // profiles are queried. 1283 user.flags |= UserInfo.FLAG_DISABLED; 1284 writeUserLocked(user); 1285 } 1286 1287 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1288 && user.isManagedProfile()) { 1289 // Send broadcast to notify system that the user removed was a 1290 // managed user. 1291 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1292 } 1293 1294 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1295 int res; 1296 try { 1297 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1298 new IStopUserCallback.Stub() { 1299 @Override 1300 public void userStopped(int userId) { 1301 finishRemoveUser(userId); 1302 } 1303 @Override 1304 public void userStopAborted(int userId) { 1305 } 1306 }); 1307 } catch (RemoteException e) { 1308 return false; 1309 } 1310 return res == ActivityManager.USER_OP_SUCCESS; 1311 } finally { 1312 Binder.restoreCallingIdentity(ident); 1313 } 1314 } 1315 1316 void finishRemoveUser(final int userHandle) { 1317 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1318 // Let other services shutdown any activity and clean up their state before completely 1319 // wiping the user's system directory and removing from the user list 1320 long ident = Binder.clearCallingIdentity(); 1321 try { 1322 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1323 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1324 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1325 android.Manifest.permission.MANAGE_USERS, 1326 1327 new BroadcastReceiver() { 1328 @Override 1329 public void onReceive(Context context, Intent intent) { 1330 if (DBG) { 1331 Slog.i(LOG_TAG, 1332 "USER_REMOVED broadcast sent, cleaning up user data " 1333 + userHandle); 1334 } 1335 new Thread() { 1336 public void run() { 1337 synchronized (mInstallLock) { 1338 synchronized (mPackagesLock) { 1339 removeUserStateLocked(userHandle); 1340 } 1341 } 1342 } 1343 }.start(); 1344 } 1345 }, 1346 1347 null, Activity.RESULT_OK, null, null); 1348 } finally { 1349 Binder.restoreCallingIdentity(ident); 1350 } 1351 } 1352 1353 private void removeUserStateLocked(final int userHandle) { 1354 // Cleanup package manager settings 1355 mPm.cleanUpUserLILPw(this, userHandle); 1356 1357 // Remove this user from the list 1358 mUsers.remove(userHandle); 1359 1360 // Have user ID linger for several seconds to let external storage VFS 1361 // cache entries expire. This must be greater than the 'entry_valid' 1362 // timeout used by the FUSE daemon. 1363 mHandler.postDelayed(new Runnable() { 1364 @Override 1365 public void run() { 1366 synchronized (mPackagesLock) { 1367 mRemovingUserIds.delete(userHandle); 1368 } 1369 } 1370 }, MINUTE_IN_MILLIS); 1371 1372 mRestrictionsPinStates.remove(userHandle); 1373 // Remove user file 1374 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1375 userFile.delete(); 1376 // Update the user list 1377 writeUserListLocked(); 1378 updateUserIdsLocked(); 1379 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1380 } 1381 1382 private void removeDirectoryRecursive(File parent) { 1383 if (parent.isDirectory()) { 1384 String[] files = parent.list(); 1385 for (String filename : files) { 1386 File child = new File(parent, filename); 1387 removeDirectoryRecursive(child); 1388 } 1389 } 1390 parent.delete(); 1391 } 1392 1393 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1394 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1395 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1396 Intent.FLAG_RECEIVER_FOREGROUND); 1397 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1398 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1399 } 1400 1401 @Override 1402 public Bundle getApplicationRestrictions(String packageName) { 1403 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1404 } 1405 1406 @Override 1407 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1408 if (UserHandle.getCallingUserId() != userId 1409 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1410 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1411 } 1412 synchronized (mPackagesLock) { 1413 // Read the restrictions from XML 1414 return readApplicationRestrictionsLocked(packageName, userId); 1415 } 1416 } 1417 1418 @Override 1419 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1420 int userId) { 1421 if (UserHandle.getCallingUserId() != userId 1422 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1423 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1424 } 1425 synchronized (mPackagesLock) { 1426 if (restrictions == null || restrictions.isEmpty()) { 1427 cleanAppRestrictionsForPackage(packageName, userId); 1428 } else { 1429 // Write the restrictions to XML 1430 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1431 } 1432 } 1433 1434 if (isPackageInstalled(packageName, userId)) { 1435 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1436 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1437 changeIntent.setPackage(packageName); 1438 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1439 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1440 } 1441 } 1442 1443 @Override 1444 public boolean setRestrictionsChallenge(String newPin) { 1445 checkManageUsersPermission("Only system can modify the restrictions pin"); 1446 int userId = UserHandle.getCallingUserId(); 1447 synchronized (mPackagesLock) { 1448 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1449 if (pinState == null) { 1450 pinState = new RestrictionsPinState(); 1451 } 1452 if (newPin == null) { 1453 pinState.salt = 0; 1454 pinState.pinHash = null; 1455 } else { 1456 try { 1457 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1458 } catch (NoSuchAlgorithmException e) { 1459 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1460 } 1461 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1462 pinState.failedAttempts = 0; 1463 } 1464 mRestrictionsPinStates.put(userId, pinState); 1465 writeUserLocked(mUsers.get(userId)); 1466 } 1467 return true; 1468 } 1469 1470 @Override 1471 public int checkRestrictionsChallenge(String pin) { 1472 checkManageUsersPermission("Only system can verify the restrictions pin"); 1473 int userId = UserHandle.getCallingUserId(); 1474 synchronized (mPackagesLock) { 1475 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1476 // If there's no pin set, return error code 1477 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1478 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1479 } else if (pin == null) { 1480 // If just checking if user can be prompted, return remaining time 1481 int waitTime = getRemainingTimeForPinAttempt(pinState); 1482 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1483 return waitTime; 1484 } else { 1485 int waitTime = getRemainingTimeForPinAttempt(pinState); 1486 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1487 if (waitTime > 0) { 1488 return waitTime; 1489 } 1490 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1491 pinState.failedAttempts = 0; 1492 writeUserLocked(mUsers.get(userId)); 1493 return UserManager.PIN_VERIFICATION_SUCCESS; 1494 } else { 1495 pinState.failedAttempts++; 1496 pinState.lastAttemptTime = System.currentTimeMillis(); 1497 writeUserLocked(mUsers.get(userId)); 1498 return waitTime; 1499 } 1500 } 1501 } 1502 } 1503 1504 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1505 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1506 BACKOFF_TIMES.length - 1); 1507 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1508 BACKOFF_TIMES[backoffIndex] : 0; 1509 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1510 0); 1511 } 1512 1513 @Override 1514 public boolean hasRestrictionsChallenge() { 1515 int userId = UserHandle.getCallingUserId(); 1516 synchronized (mPackagesLock) { 1517 return hasRestrictionsPinLocked(userId); 1518 } 1519 } 1520 1521 private boolean hasRestrictionsPinLocked(int userId) { 1522 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1523 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1524 return false; 1525 } 1526 return true; 1527 } 1528 1529 @Override 1530 public void removeRestrictions() { 1531 checkManageUsersPermission("Only system can remove restrictions"); 1532 final int userHandle = UserHandle.getCallingUserId(); 1533 removeRestrictionsForUser(userHandle, true); 1534 } 1535 1536 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1537 synchronized (mPackagesLock) { 1538 // Remove all user restrictions 1539 setUserRestrictions(new Bundle(), userHandle); 1540 // Remove restrictions pin 1541 setRestrictionsChallenge(null); 1542 // Remove any app restrictions 1543 cleanAppRestrictions(userHandle); 1544 } 1545 if (unhideApps) { 1546 unhideAllInstalledAppsForUser(userHandle); 1547 } 1548 } 1549 1550 private void unhideAllInstalledAppsForUser(final int userHandle) { 1551 mHandler.post(new Runnable() { 1552 @Override 1553 public void run() { 1554 List<ApplicationInfo> apps = 1555 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1556 userHandle).getList(); 1557 final long ident = Binder.clearCallingIdentity(); 1558 try { 1559 for (ApplicationInfo appInfo : apps) { 1560 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1561 && (appInfo.flags & ApplicationInfo.FLAG_HIDDEN) != 0) { 1562 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1563 userHandle); 1564 } 1565 } 1566 } finally { 1567 Binder.restoreCallingIdentity(ident); 1568 } 1569 } 1570 }); 1571 } 1572 1573 /* 1574 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1575 * Not the most secure, but it is at least a second level of protection. First level is that 1576 * the file is in a location only readable by the system process. 1577 * @param password the password. 1578 * @param salt the randomly generated salt 1579 * @return the hash of the pattern in a String. 1580 */ 1581 private String passwordToHash(String password, long salt) { 1582 if (password == null) { 1583 return null; 1584 } 1585 String algo = null; 1586 String hashed = salt + password; 1587 try { 1588 byte[] saltedPassword = (password + salt).getBytes(); 1589 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1590 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1591 hashed = toHex(sha1) + toHex(md5); 1592 } catch (NoSuchAlgorithmException e) { 1593 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1594 } 1595 return hashed; 1596 } 1597 1598 private static String toHex(byte[] ary) { 1599 final String hex = "0123456789ABCDEF"; 1600 String ret = ""; 1601 for (int i = 0; i < ary.length; i++) { 1602 ret += hex.charAt((ary[i] >> 4) & 0xf); 1603 ret += hex.charAt(ary[i] & 0xf); 1604 } 1605 return ret; 1606 } 1607 1608 private int getUidForPackage(String packageName) { 1609 long ident = Binder.clearCallingIdentity(); 1610 try { 1611 return mContext.getPackageManager().getApplicationInfo(packageName, 1612 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1613 } catch (NameNotFoundException nnfe) { 1614 return -1; 1615 } finally { 1616 Binder.restoreCallingIdentity(ident); 1617 } 1618 } 1619 1620 private Bundle readApplicationRestrictionsLocked(String packageName, 1621 int userId) { 1622 final Bundle restrictions = new Bundle(); 1623 final ArrayList<String> values = new ArrayList<String>(); 1624 1625 FileInputStream fis = null; 1626 try { 1627 AtomicFile restrictionsFile = 1628 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1629 packageToRestrictionsFileName(packageName))); 1630 fis = restrictionsFile.openRead(); 1631 XmlPullParser parser = Xml.newPullParser(); 1632 parser.setInput(fis, null); 1633 int type; 1634 while ((type = parser.next()) != XmlPullParser.START_TAG 1635 && type != XmlPullParser.END_DOCUMENT) { 1636 ; 1637 } 1638 1639 if (type != XmlPullParser.START_TAG) { 1640 Slog.e(LOG_TAG, "Unable to read restrictions file " 1641 + restrictionsFile.getBaseFile()); 1642 return restrictions; 1643 } 1644 1645 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1646 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1647 String key = parser.getAttributeValue(null, ATTR_KEY); 1648 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1649 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1650 if (multiple != null) { 1651 values.clear(); 1652 int count = Integer.parseInt(multiple); 1653 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1654 if (type == XmlPullParser.START_TAG 1655 && parser.getName().equals(TAG_VALUE)) { 1656 values.add(parser.nextText().trim()); 1657 count--; 1658 } 1659 } 1660 String [] valueStrings = new String[values.size()]; 1661 values.toArray(valueStrings); 1662 restrictions.putStringArray(key, valueStrings); 1663 } else { 1664 String value = parser.nextText().trim(); 1665 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1666 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1667 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1668 restrictions.putInt(key, Integer.parseInt(value)); 1669 } else { 1670 restrictions.putString(key, value); 1671 } 1672 } 1673 } 1674 } 1675 } catch (IOException ioe) { 1676 } catch (XmlPullParserException pe) { 1677 } finally { 1678 if (fis != null) { 1679 try { 1680 fis.close(); 1681 } catch (IOException e) { 1682 } 1683 } 1684 } 1685 return restrictions; 1686 } 1687 1688 private void writeApplicationRestrictionsLocked(String packageName, 1689 Bundle restrictions, int userId) { 1690 FileOutputStream fos = null; 1691 AtomicFile restrictionsFile = new AtomicFile( 1692 new File(Environment.getUserSystemDirectory(userId), 1693 packageToRestrictionsFileName(packageName))); 1694 try { 1695 fos = restrictionsFile.startWrite(); 1696 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1697 1698 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1699 final XmlSerializer serializer = new FastXmlSerializer(); 1700 serializer.setOutput(bos, "utf-8"); 1701 serializer.startDocument(null, true); 1702 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1703 1704 serializer.startTag(null, TAG_RESTRICTIONS); 1705 1706 for (String key : restrictions.keySet()) { 1707 Object value = restrictions.get(key); 1708 serializer.startTag(null, TAG_ENTRY); 1709 serializer.attribute(null, ATTR_KEY, key); 1710 1711 if (value instanceof Boolean) { 1712 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1713 serializer.text(value.toString()); 1714 } else if (value instanceof Integer) { 1715 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1716 serializer.text(value.toString()); 1717 } else if (value == null || value instanceof String) { 1718 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1719 serializer.text(value != null ? (String) value : ""); 1720 } else { 1721 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1722 String[] values = (String[]) value; 1723 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1724 for (String choice : values) { 1725 serializer.startTag(null, TAG_VALUE); 1726 serializer.text(choice != null ? choice : ""); 1727 serializer.endTag(null, TAG_VALUE); 1728 } 1729 } 1730 serializer.endTag(null, TAG_ENTRY); 1731 } 1732 1733 serializer.endTag(null, TAG_RESTRICTIONS); 1734 1735 serializer.endDocument(); 1736 restrictionsFile.finishWrite(fos); 1737 } catch (Exception e) { 1738 restrictionsFile.failWrite(fos); 1739 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1740 } 1741 } 1742 1743 @Override 1744 public int getUserSerialNumber(int userHandle) { 1745 synchronized (mPackagesLock) { 1746 if (!exists(userHandle)) return -1; 1747 return getUserInfoLocked(userHandle).serialNumber; 1748 } 1749 } 1750 1751 @Override 1752 public int getUserHandle(int userSerialNumber) { 1753 synchronized (mPackagesLock) { 1754 for (int userId : mUserIds) { 1755 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1756 } 1757 // Not found 1758 return -1; 1759 } 1760 } 1761 1762 /** 1763 * Caches the list of user ids in an array, adjusting the array size when necessary. 1764 */ 1765 private void updateUserIdsLocked() { 1766 int num = 0; 1767 for (int i = 0; i < mUsers.size(); i++) { 1768 if (!mUsers.valueAt(i).partial) { 1769 num++; 1770 } 1771 } 1772 final int[] newUsers = new int[num]; 1773 int n = 0; 1774 for (int i = 0; i < mUsers.size(); i++) { 1775 if (!mUsers.valueAt(i).partial) { 1776 newUsers[n++] = mUsers.keyAt(i); 1777 } 1778 } 1779 mUserIds = newUsers; 1780 } 1781 1782 /** 1783 * Make a note of the last started time of a user and do some cleanup. 1784 * @param userId the user that was just foregrounded 1785 */ 1786 public void userForeground(int userId) { 1787 synchronized (mPackagesLock) { 1788 UserInfo user = mUsers.get(userId); 1789 long now = System.currentTimeMillis(); 1790 if (user == null || user.partial) { 1791 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1792 return; 1793 } 1794 if (now > EPOCH_PLUS_30_YEARS) { 1795 user.lastLoggedInTime = now; 1796 writeUserLocked(user); 1797 } 1798 } 1799 } 1800 1801 /** 1802 * Returns the next available user id, filling in any holes in the ids. 1803 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1804 * for data and battery stats collection, or unexpected cross-talk. 1805 * @return 1806 */ 1807 private int getNextAvailableIdLocked() { 1808 synchronized (mPackagesLock) { 1809 int i = MIN_USER_ID; 1810 while (i < Integer.MAX_VALUE) { 1811 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1812 break; 1813 } 1814 i++; 1815 } 1816 return i; 1817 } 1818 } 1819 1820 private String packageToRestrictionsFileName(String packageName) { 1821 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1822 } 1823 1824 private String restrictionsFileNameToPackage(String fileName) { 1825 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1826 (int) (fileName.length() - XML_SUFFIX.length())); 1827 } 1828 1829 @Override 1830 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1831 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1832 != PackageManager.PERMISSION_GRANTED) { 1833 pw.println("Permission Denial: can't dump UserManager from from pid=" 1834 + Binder.getCallingPid() 1835 + ", uid=" + Binder.getCallingUid() 1836 + " without permission " 1837 + android.Manifest.permission.DUMP); 1838 return; 1839 } 1840 1841 long now = System.currentTimeMillis(); 1842 StringBuilder sb = new StringBuilder(); 1843 synchronized (mPackagesLock) { 1844 pw.println("Users:"); 1845 for (int i = 0; i < mUsers.size(); i++) { 1846 UserInfo user = mUsers.valueAt(i); 1847 if (user == null) continue; 1848 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1849 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1850 if (user.partial) pw.print(" <partial>"); 1851 pw.println(); 1852 pw.print(" Created: "); 1853 if (user.creationTime == 0) { 1854 pw.println("<unknown>"); 1855 } else { 1856 sb.setLength(0); 1857 TimeUtils.formatDuration(now - user.creationTime, sb); 1858 sb.append(" ago"); 1859 pw.println(sb); 1860 } 1861 pw.print(" Last logged in: "); 1862 if (user.lastLoggedInTime == 0) { 1863 pw.println("<unknown>"); 1864 } else { 1865 sb.setLength(0); 1866 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1867 sb.append(" ago"); 1868 pw.println(sb); 1869 } 1870 } 1871 } 1872 } 1873} 1874