UserManagerService.java revision 26af829fd70609cf073b56e54e1f78faf83a5e8b
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.ActivityThread; 25import android.app.IStopUserCallback; 26import android.content.BroadcastReceiver; 27import android.content.Context; 28import android.content.Intent; 29import android.content.pm.ApplicationInfo; 30import android.content.pm.PackageManager; 31import android.content.pm.PackageManager.NameNotFoundException; 32import android.content.pm.UserInfo; 33import android.graphics.Bitmap; 34import android.graphics.BitmapFactory; 35import android.os.Binder; 36import android.os.Bundle; 37import android.os.Environment; 38import android.os.FileUtils; 39import android.os.Handler; 40import android.os.IUserManager; 41import android.os.Process; 42import android.os.RemoteException; 43import android.os.ServiceManager; 44import android.os.UserHandle; 45import android.os.UserManager; 46import android.util.AtomicFile; 47import android.util.Log; 48import android.util.Slog; 49import android.util.SparseArray; 50import android.util.SparseBooleanArray; 51import android.util.TimeUtils; 52import android.util.Xml; 53 54import com.android.internal.app.IAppOpsService; 55import com.android.internal.util.ArrayUtils; 56import com.android.internal.util.FastXmlSerializer; 57 58import org.xmlpull.v1.XmlPullParser; 59import org.xmlpull.v1.XmlPullParserException; 60import org.xmlpull.v1.XmlSerializer; 61 62import java.io.BufferedOutputStream; 63import java.io.File; 64import java.io.FileDescriptor; 65import java.io.FileInputStream; 66import java.io.FileNotFoundException; 67import java.io.FileOutputStream; 68import java.io.IOException; 69import java.io.PrintWriter; 70import java.security.MessageDigest; 71import java.security.NoSuchAlgorithmException; 72import java.security.SecureRandom; 73import java.util.ArrayList; 74import java.util.List; 75 76public class UserManagerService extends IUserManager.Stub { 77 78 private static final String LOG_TAG = "UserManagerService"; 79 80 private static final boolean DBG = false; 81 82 private static final String TAG_NAME = "name"; 83 private static final String ATTR_FLAGS = "flags"; 84 private static final String ATTR_ICON_PATH = "icon"; 85 private static final String ATTR_ID = "id"; 86 private static final String ATTR_CREATION_TIME = "created"; 87 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 88 private static final String ATTR_SALT = "salt"; 89 private static final String ATTR_PIN_HASH = "pinHash"; 90 private static final String ATTR_FAILED_ATTEMPTS = "failedAttempts"; 91 private static final String ATTR_LAST_RETRY_MS = "lastAttemptMs"; 92 private static final String ATTR_SERIAL_NO = "serialNumber"; 93 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 94 private static final String ATTR_PARTIAL = "partial"; 95 private static final String ATTR_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 && 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.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 763 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 764 Integer.toString(userInfo.profileGroupId)); 765 } 766 767 serializer.startTag(null, TAG_NAME); 768 serializer.text(userInfo.name); 769 serializer.endTag(null, TAG_NAME); 770 Bundle restrictions = mUserRestrictions.get(userInfo.id); 771 if (restrictions != null) { 772 writeRestrictionsLocked(serializer, restrictions); 773 } 774 serializer.endTag(null, TAG_USER); 775 776 serializer.endDocument(); 777 userFile.finishWrite(fos); 778 } catch (Exception ioe) { 779 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 780 userFile.failWrite(fos); 781 } 782 } 783 784 /* 785 * Writes the user list file in this format: 786 * 787 * <users nextSerialNumber="3"> 788 * <user id="0"></user> 789 * <user id="2"></user> 790 * </users> 791 */ 792 private void writeUserListLocked() { 793 FileOutputStream fos = null; 794 AtomicFile userListFile = new AtomicFile(mUserListFile); 795 try { 796 fos = userListFile.startWrite(); 797 final BufferedOutputStream bos = new BufferedOutputStream(fos); 798 799 // XmlSerializer serializer = XmlUtils.serializerInstance(); 800 final XmlSerializer serializer = new FastXmlSerializer(); 801 serializer.setOutput(bos, "utf-8"); 802 serializer.startDocument(null, true); 803 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 804 805 serializer.startTag(null, TAG_USERS); 806 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 807 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 808 809 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 810 writeRestrictionsLocked(serializer, mGuestRestrictions); 811 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 812 for (int i = 0; i < mUsers.size(); i++) { 813 UserInfo user = mUsers.valueAt(i); 814 serializer.startTag(null, TAG_USER); 815 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 816 serializer.endTag(null, TAG_USER); 817 } 818 819 serializer.endTag(null, TAG_USERS); 820 821 serializer.endDocument(); 822 userListFile.finishWrite(fos); 823 } catch (Exception e) { 824 userListFile.failWrite(fos); 825 Slog.e(LOG_TAG, "Error writing user list"); 826 } 827 } 828 829 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 830 throws IOException { 831 serializer.startTag(null, TAG_RESTRICTIONS); 832 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 833 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 834 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 835 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 836 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 837 writeBoolean(serializer, restrictions, 838 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 839 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 840 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 841 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 842 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 843 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 844 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 845 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 846 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 847 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 848 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 849 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 850 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 851 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 852 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 853 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 854 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 855 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 856 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 857 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 858 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 859 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 860 serializer.endTag(null, TAG_RESTRICTIONS); 861 } 862 863 private UserInfo readUserLocked(int id) { 864 int flags = 0; 865 int serialNumber = id; 866 String name = null; 867 String iconPath = null; 868 long creationTime = 0L; 869 long lastLoggedInTime = 0L; 870 long salt = 0L; 871 String pinHash = null; 872 int failedAttempts = 0; 873 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 874 long lastAttemptTime = 0L; 875 boolean partial = false; 876 Bundle restrictions = new Bundle(); 877 878 FileInputStream fis = null; 879 try { 880 AtomicFile userFile = 881 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 882 fis = userFile.openRead(); 883 XmlPullParser parser = Xml.newPullParser(); 884 parser.setInput(fis, null); 885 int type; 886 while ((type = parser.next()) != XmlPullParser.START_TAG 887 && type != XmlPullParser.END_DOCUMENT) { 888 ; 889 } 890 891 if (type != XmlPullParser.START_TAG) { 892 Slog.e(LOG_TAG, "Unable to read user " + id); 893 return null; 894 } 895 896 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 897 int storedId = readIntAttribute(parser, ATTR_ID, -1); 898 if (storedId != id) { 899 Slog.e(LOG_TAG, "User id does not match the file name"); 900 return null; 901 } 902 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 903 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 904 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 905 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 906 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 907 salt = readLongAttribute(parser, ATTR_SALT, 0L); 908 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 909 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 910 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 911 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 912 UserInfo.NO_PROFILE_GROUP_ID); 913 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 914 // This attribute was added and renamed during development of L. 915 // TODO Remove upgrade path by 1st May 2014 916 profileGroupId = readIntAttribute(parser, "relatedGroupId", 917 UserInfo.NO_PROFILE_GROUP_ID); 918 } 919 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 920 if ("true".equals(valueString)) { 921 partial = true; 922 } 923 924 int outerDepth = parser.getDepth(); 925 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 926 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 927 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 928 continue; 929 } 930 String tag = parser.getName(); 931 if (TAG_NAME.equals(tag)) { 932 type = parser.next(); 933 if (type == XmlPullParser.TEXT) { 934 name = parser.getText(); 935 } 936 } else if (TAG_RESTRICTIONS.equals(tag)) { 937 readRestrictionsLocked(parser, restrictions); 938 } 939 } 940 } 941 942 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 943 userInfo.serialNumber = serialNumber; 944 userInfo.creationTime = creationTime; 945 userInfo.lastLoggedInTime = lastLoggedInTime; 946 userInfo.partial = partial; 947 userInfo.profileGroupId = profileGroupId; 948 mUserRestrictions.append(id, restrictions); 949 if (salt != 0L) { 950 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 951 if (pinState == null) { 952 pinState = new RestrictionsPinState(); 953 mRestrictionsPinStates.put(id, pinState); 954 } 955 pinState.salt = salt; 956 pinState.pinHash = pinHash; 957 pinState.failedAttempts = failedAttempts; 958 pinState.lastAttemptTime = lastAttemptTime; 959 } 960 return userInfo; 961 962 } catch (IOException ioe) { 963 } catch (XmlPullParserException pe) { 964 } finally { 965 if (fis != null) { 966 try { 967 fis.close(); 968 } catch (IOException e) { 969 } 970 } 971 } 972 return null; 973 } 974 975 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 976 throws IOException { 977 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 978 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 979 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 980 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 981 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 982 readBoolean(parser, restrictions, 983 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 984 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 985 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 986 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 987 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 988 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 989 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 990 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 991 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 992 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 993 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 994 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 995 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 996 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 997 readBoolean(parser, restrictions, 998 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 999 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1000 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1001 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1002 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1003 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1004 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1005 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1006 } 1007 1008 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1009 String restrictionKey) { 1010 String value = parser.getAttributeValue(null, restrictionKey); 1011 if (value != null) { 1012 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1013 } 1014 } 1015 1016 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1017 throws IOException { 1018 if (restrictions.containsKey(restrictionKey)) { 1019 xml.attribute(null, restrictionKey, 1020 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1021 } 1022 } 1023 1024 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1025 String valueString = parser.getAttributeValue(null, attr); 1026 if (valueString == null) return defaultValue; 1027 try { 1028 return Integer.parseInt(valueString); 1029 } catch (NumberFormatException nfe) { 1030 return defaultValue; 1031 } 1032 } 1033 1034 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1035 String valueString = parser.getAttributeValue(null, attr); 1036 if (valueString == null) return defaultValue; 1037 try { 1038 return Long.parseLong(valueString); 1039 } catch (NumberFormatException nfe) { 1040 return defaultValue; 1041 } 1042 } 1043 1044 private boolean isPackageInstalled(String pkg, int userId) { 1045 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1046 PackageManager.GET_UNINSTALLED_PACKAGES, 1047 userId); 1048 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1049 return false; 1050 } 1051 return true; 1052 } 1053 1054 /** 1055 * Removes all the restrictions files (res_<packagename>) for a given user. 1056 * Does not do any permissions checking. 1057 */ 1058 private void cleanAppRestrictions(int userId) { 1059 synchronized (mPackagesLock) { 1060 File dir = Environment.getUserSystemDirectory(userId); 1061 String[] files = dir.list(); 1062 if (files == null) return; 1063 for (String fileName : files) { 1064 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1065 File resFile = new File(dir, fileName); 1066 if (resFile.exists()) { 1067 resFile.delete(); 1068 } 1069 } 1070 } 1071 } 1072 } 1073 1074 /** 1075 * Removes the app restrictions file for a specific package and user id, if it exists. 1076 */ 1077 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1078 synchronized (mPackagesLock) { 1079 File dir = Environment.getUserSystemDirectory(userId); 1080 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1081 if (resFile.exists()) { 1082 resFile.delete(); 1083 } 1084 } 1085 } 1086 1087 @Override 1088 public UserInfo createProfileForUser(String name, int flags, int userId) { 1089 checkManageUsersPermission("Only the system can create users"); 1090 if (userId != UserHandle.USER_OWNER) { 1091 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1092 return null; 1093 } 1094 return createUserInternal(name, flags, userId); 1095 } 1096 1097 @Override 1098 public UserInfo createUser(String name, int flags) { 1099 checkManageUsersPermission("Only the system can create users"); 1100 return createUserInternal(name, flags, UserHandle.USER_NULL); 1101 } 1102 1103 private UserInfo createUserInternal(String name, int flags, int parentId) { 1104 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1105 UserManager.DISALLOW_ADD_USER, false)) { 1106 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1107 return null; 1108 } 1109 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1110 final long ident = Binder.clearCallingIdentity(); 1111 UserInfo userInfo = null; 1112 try { 1113 synchronized (mInstallLock) { 1114 synchronized (mPackagesLock) { 1115 UserInfo parent = null; 1116 if (parentId != UserHandle.USER_NULL) { 1117 parent = getUserInfoLocked(parentId); 1118 if (parent == null) return null; 1119 } 1120 // If we're not adding a guest user and the limit has been reached, 1121 // cannot add a user. 1122 if (!isGuest && isUserLimitReachedLocked()) { 1123 return null; 1124 } 1125 // If we're adding a guest and there already exists one, bail. 1126 if (isGuest && numberOfUsersOfTypeLocked(UserInfo.FLAG_GUEST, true) > 0) { 1127 return null; 1128 } 1129 // Limit number of managed profiles that can be created 1130 if ((flags & UserInfo.FLAG_MANAGED_PROFILE) != 0 1131 && numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 1132 >= MAX_MANAGED_PROFILES) { 1133 return null; 1134 } 1135 int userId = getNextAvailableIdLocked(); 1136 userInfo = new UserInfo(userId, name, null, flags); 1137 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1138 userInfo.serialNumber = mNextSerialNumber++; 1139 long now = System.currentTimeMillis(); 1140 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1141 userInfo.partial = true; 1142 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1143 mUsers.put(userId, userInfo); 1144 writeUserListLocked(); 1145 if (parent != null) { 1146 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1147 parent.profileGroupId = parent.id; 1148 writeUserLocked(parent); 1149 } 1150 userInfo.profileGroupId = parent.profileGroupId; 1151 } 1152 writeUserLocked(userInfo); 1153 mPm.createNewUserLILPw(userId, userPath); 1154 userInfo.partial = false; 1155 writeUserLocked(userInfo); 1156 updateUserIdsLocked(); 1157 Bundle restrictions = new Bundle(); 1158 mUserRestrictions.append(userId, restrictions); 1159 } 1160 } 1161 if (userInfo != null) { 1162 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1163 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1164 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1165 android.Manifest.permission.MANAGE_USERS); 1166 } 1167 } finally { 1168 Binder.restoreCallingIdentity(ident); 1169 } 1170 return userInfo; 1171 } 1172 1173 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1174 int count = 0; 1175 for (int i = mUsers.size() - 1; i >= 0; i--) { 1176 UserInfo user = mUsers.valueAt(i); 1177 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1178 if ((user.flags & flags) != 0) { 1179 count++; 1180 } 1181 } 1182 } 1183 return count; 1184 } 1185 1186 /** 1187 * Mark this guest user for deletion to allow us to create another guest 1188 * and switch to that user before actually removing this guest. 1189 * @param userHandle the userid of the current guest 1190 * @return whether the user could be marked for deletion 1191 */ 1192 public boolean markGuestForDeletion(int userHandle) { 1193 checkManageUsersPermission("Only the system can remove users"); 1194 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1195 UserManager.DISALLOW_REMOVE_USER, false)) { 1196 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1197 return false; 1198 } 1199 1200 long ident = Binder.clearCallingIdentity(); 1201 try { 1202 final UserInfo user; 1203 synchronized (mPackagesLock) { 1204 user = mUsers.get(userHandle); 1205 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1206 return false; 1207 } 1208 if (!user.isGuest()) { 1209 return false; 1210 } 1211 // Set this to a partially created user, so that the user will be purged 1212 // on next startup, in case the runtime stops now before stopping and 1213 // removing the user completely. 1214 user.partial = true; 1215 // Mark it as disabled, so that it isn't returned any more when 1216 // profiles are queried. 1217 user.flags |= UserInfo.FLAG_DISABLED; 1218 user.flags &= ~UserInfo.FLAG_GUEST; 1219 writeUserLocked(user); 1220 } 1221 } finally { 1222 Binder.restoreCallingIdentity(ident); 1223 } 1224 return true; 1225 } 1226 1227 /** 1228 * Removes a user and all data directories created for that user. This method should be called 1229 * after the user's processes have been terminated. 1230 * @param userHandle the user's id 1231 */ 1232 public boolean removeUser(int userHandle) { 1233 checkManageUsersPermission("Only the system can remove users"); 1234 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1235 UserManager.DISALLOW_REMOVE_USER, false)) { 1236 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1237 return false; 1238 } 1239 1240 long ident = Binder.clearCallingIdentity(); 1241 try { 1242 final UserInfo user; 1243 synchronized (mPackagesLock) { 1244 user = mUsers.get(userHandle); 1245 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1246 return false; 1247 } 1248 mRemovingUserIds.put(userHandle, true); 1249 try { 1250 mAppOpsService.removeUser(userHandle); 1251 } catch (RemoteException e) { 1252 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1253 } 1254 // Set this to a partially created user, so that the user will be purged 1255 // on next startup, in case the runtime stops now before stopping and 1256 // removing the user completely. 1257 user.partial = true; 1258 // Mark it as disabled, so that it isn't returned any more when 1259 // profiles are queried. 1260 user.flags |= UserInfo.FLAG_DISABLED; 1261 writeUserLocked(user); 1262 } 1263 1264 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1265 && user.isManagedProfile()) { 1266 // Send broadcast to notify system that the user removed was a 1267 // managed user. 1268 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1269 } 1270 1271 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1272 int res; 1273 try { 1274 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1275 new IStopUserCallback.Stub() { 1276 @Override 1277 public void userStopped(int userId) { 1278 finishRemoveUser(userId); 1279 } 1280 @Override 1281 public void userStopAborted(int userId) { 1282 } 1283 }); 1284 } catch (RemoteException e) { 1285 return false; 1286 } 1287 return res == ActivityManager.USER_OP_SUCCESS; 1288 } finally { 1289 Binder.restoreCallingIdentity(ident); 1290 } 1291 } 1292 1293 void finishRemoveUser(final int userHandle) { 1294 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1295 // Let other services shutdown any activity and clean up their state before completely 1296 // wiping the user's system directory and removing from the user list 1297 long ident = Binder.clearCallingIdentity(); 1298 try { 1299 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1300 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1301 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1302 android.Manifest.permission.MANAGE_USERS, 1303 1304 new BroadcastReceiver() { 1305 @Override 1306 public void onReceive(Context context, Intent intent) { 1307 if (DBG) { 1308 Slog.i(LOG_TAG, 1309 "USER_REMOVED broadcast sent, cleaning up user data " 1310 + userHandle); 1311 } 1312 new Thread() { 1313 public void run() { 1314 synchronized (mInstallLock) { 1315 synchronized (mPackagesLock) { 1316 removeUserStateLocked(userHandle); 1317 } 1318 } 1319 } 1320 }.start(); 1321 } 1322 }, 1323 1324 null, Activity.RESULT_OK, null, null); 1325 } finally { 1326 Binder.restoreCallingIdentity(ident); 1327 } 1328 } 1329 1330 private void removeUserStateLocked(final int userHandle) { 1331 // Cleanup package manager settings 1332 mPm.cleanUpUserLILPw(this, userHandle); 1333 1334 // Remove this user from the list 1335 mUsers.remove(userHandle); 1336 1337 // Have user ID linger for several seconds to let external storage VFS 1338 // cache entries expire. This must be greater than the 'entry_valid' 1339 // timeout used by the FUSE daemon. 1340 mHandler.postDelayed(new Runnable() { 1341 @Override 1342 public void run() { 1343 synchronized (mPackagesLock) { 1344 mRemovingUserIds.delete(userHandle); 1345 } 1346 } 1347 }, MINUTE_IN_MILLIS); 1348 1349 mRestrictionsPinStates.remove(userHandle); 1350 // Remove user file 1351 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1352 userFile.delete(); 1353 // Update the user list 1354 writeUserListLocked(); 1355 updateUserIdsLocked(); 1356 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1357 } 1358 1359 private void removeDirectoryRecursive(File parent) { 1360 if (parent.isDirectory()) { 1361 String[] files = parent.list(); 1362 for (String filename : files) { 1363 File child = new File(parent, filename); 1364 removeDirectoryRecursive(child); 1365 } 1366 } 1367 parent.delete(); 1368 } 1369 1370 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1371 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1372 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1373 Intent.FLAG_RECEIVER_FOREGROUND); 1374 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1375 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1376 } 1377 1378 @Override 1379 public Bundle getApplicationRestrictions(String packageName) { 1380 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1381 } 1382 1383 @Override 1384 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1385 if (UserHandle.getCallingUserId() != userId 1386 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1387 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1388 } 1389 synchronized (mPackagesLock) { 1390 // Read the restrictions from XML 1391 return readApplicationRestrictionsLocked(packageName, userId); 1392 } 1393 } 1394 1395 @Override 1396 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1397 int userId) { 1398 if (UserHandle.getCallingUserId() != userId 1399 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1400 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1401 } 1402 synchronized (mPackagesLock) { 1403 if (restrictions == null || restrictions.isEmpty()) { 1404 cleanAppRestrictionsForPackage(packageName, userId); 1405 } else { 1406 // Write the restrictions to XML 1407 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1408 } 1409 } 1410 1411 if (isPackageInstalled(packageName, userId)) { 1412 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1413 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1414 changeIntent.setPackage(packageName); 1415 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1416 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1417 } 1418 } 1419 1420 @Override 1421 public boolean setRestrictionsChallenge(String newPin) { 1422 checkManageUsersPermission("Only system can modify the restrictions pin"); 1423 int userId = UserHandle.getCallingUserId(); 1424 synchronized (mPackagesLock) { 1425 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1426 if (pinState == null) { 1427 pinState = new RestrictionsPinState(); 1428 } 1429 if (newPin == null) { 1430 pinState.salt = 0; 1431 pinState.pinHash = null; 1432 } else { 1433 try { 1434 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1435 } catch (NoSuchAlgorithmException e) { 1436 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1437 } 1438 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1439 pinState.failedAttempts = 0; 1440 } 1441 mRestrictionsPinStates.put(userId, pinState); 1442 writeUserLocked(mUsers.get(userId)); 1443 } 1444 return true; 1445 } 1446 1447 @Override 1448 public int checkRestrictionsChallenge(String pin) { 1449 checkManageUsersPermission("Only system can verify the restrictions pin"); 1450 int userId = UserHandle.getCallingUserId(); 1451 synchronized (mPackagesLock) { 1452 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1453 // If there's no pin set, return error code 1454 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1455 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1456 } else if (pin == null) { 1457 // If just checking if user can be prompted, return remaining time 1458 int waitTime = getRemainingTimeForPinAttempt(pinState); 1459 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1460 return waitTime; 1461 } else { 1462 int waitTime = getRemainingTimeForPinAttempt(pinState); 1463 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1464 if (waitTime > 0) { 1465 return waitTime; 1466 } 1467 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1468 pinState.failedAttempts = 0; 1469 writeUserLocked(mUsers.get(userId)); 1470 return UserManager.PIN_VERIFICATION_SUCCESS; 1471 } else { 1472 pinState.failedAttempts++; 1473 pinState.lastAttemptTime = System.currentTimeMillis(); 1474 writeUserLocked(mUsers.get(userId)); 1475 return waitTime; 1476 } 1477 } 1478 } 1479 } 1480 1481 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1482 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1483 BACKOFF_TIMES.length - 1); 1484 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1485 BACKOFF_TIMES[backoffIndex] : 0; 1486 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1487 0); 1488 } 1489 1490 @Override 1491 public boolean hasRestrictionsChallenge() { 1492 int userId = UserHandle.getCallingUserId(); 1493 synchronized (mPackagesLock) { 1494 return hasRestrictionsPinLocked(userId); 1495 } 1496 } 1497 1498 private boolean hasRestrictionsPinLocked(int userId) { 1499 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1500 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1501 return false; 1502 } 1503 return true; 1504 } 1505 1506 @Override 1507 public void removeRestrictions() { 1508 checkManageUsersPermission("Only system can remove restrictions"); 1509 final int userHandle = UserHandle.getCallingUserId(); 1510 removeRestrictionsForUser(userHandle, true); 1511 } 1512 1513 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1514 synchronized (mPackagesLock) { 1515 // Remove all user restrictions 1516 setUserRestrictions(new Bundle(), userHandle); 1517 // Remove restrictions pin 1518 setRestrictionsChallenge(null); 1519 // Remove any app restrictions 1520 cleanAppRestrictions(userHandle); 1521 } 1522 if (unhideApps) { 1523 unhideAllInstalledAppsForUser(userHandle); 1524 } 1525 } 1526 1527 private void unhideAllInstalledAppsForUser(final int userHandle) { 1528 mHandler.post(new Runnable() { 1529 @Override 1530 public void run() { 1531 List<ApplicationInfo> apps = 1532 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1533 userHandle).getList(); 1534 final long ident = Binder.clearCallingIdentity(); 1535 try { 1536 for (ApplicationInfo appInfo : apps) { 1537 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1538 && (appInfo.flags & ApplicationInfo.FLAG_HIDDEN) != 0) { 1539 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1540 userHandle); 1541 } 1542 } 1543 } finally { 1544 Binder.restoreCallingIdentity(ident); 1545 } 1546 } 1547 }); 1548 } 1549 1550 /* 1551 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1552 * Not the most secure, but it is at least a second level of protection. First level is that 1553 * the file is in a location only readable by the system process. 1554 * @param password the password. 1555 * @param salt the randomly generated salt 1556 * @return the hash of the pattern in a String. 1557 */ 1558 private String passwordToHash(String password, long salt) { 1559 if (password == null) { 1560 return null; 1561 } 1562 String algo = null; 1563 String hashed = salt + password; 1564 try { 1565 byte[] saltedPassword = (password + salt).getBytes(); 1566 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1567 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1568 hashed = toHex(sha1) + toHex(md5); 1569 } catch (NoSuchAlgorithmException e) { 1570 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1571 } 1572 return hashed; 1573 } 1574 1575 private static String toHex(byte[] ary) { 1576 final String hex = "0123456789ABCDEF"; 1577 String ret = ""; 1578 for (int i = 0; i < ary.length; i++) { 1579 ret += hex.charAt((ary[i] >> 4) & 0xf); 1580 ret += hex.charAt(ary[i] & 0xf); 1581 } 1582 return ret; 1583 } 1584 1585 private int getUidForPackage(String packageName) { 1586 long ident = Binder.clearCallingIdentity(); 1587 try { 1588 return mContext.getPackageManager().getApplicationInfo(packageName, 1589 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1590 } catch (NameNotFoundException nnfe) { 1591 return -1; 1592 } finally { 1593 Binder.restoreCallingIdentity(ident); 1594 } 1595 } 1596 1597 private Bundle readApplicationRestrictionsLocked(String packageName, 1598 int userId) { 1599 final Bundle restrictions = new Bundle(); 1600 final ArrayList<String> values = new ArrayList<String>(); 1601 1602 FileInputStream fis = null; 1603 try { 1604 AtomicFile restrictionsFile = 1605 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1606 packageToRestrictionsFileName(packageName))); 1607 fis = restrictionsFile.openRead(); 1608 XmlPullParser parser = Xml.newPullParser(); 1609 parser.setInput(fis, null); 1610 int type; 1611 while ((type = parser.next()) != XmlPullParser.START_TAG 1612 && type != XmlPullParser.END_DOCUMENT) { 1613 ; 1614 } 1615 1616 if (type != XmlPullParser.START_TAG) { 1617 Slog.e(LOG_TAG, "Unable to read restrictions file " 1618 + restrictionsFile.getBaseFile()); 1619 return restrictions; 1620 } 1621 1622 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1623 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1624 String key = parser.getAttributeValue(null, ATTR_KEY); 1625 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1626 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1627 if (multiple != null) { 1628 values.clear(); 1629 int count = Integer.parseInt(multiple); 1630 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1631 if (type == XmlPullParser.START_TAG 1632 && parser.getName().equals(TAG_VALUE)) { 1633 values.add(parser.nextText().trim()); 1634 count--; 1635 } 1636 } 1637 String [] valueStrings = new String[values.size()]; 1638 values.toArray(valueStrings); 1639 restrictions.putStringArray(key, valueStrings); 1640 } else { 1641 String value = parser.nextText().trim(); 1642 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1643 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1644 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1645 restrictions.putInt(key, Integer.parseInt(value)); 1646 } else { 1647 restrictions.putString(key, value); 1648 } 1649 } 1650 } 1651 } 1652 } catch (IOException ioe) { 1653 } catch (XmlPullParserException pe) { 1654 } finally { 1655 if (fis != null) { 1656 try { 1657 fis.close(); 1658 } catch (IOException e) { 1659 } 1660 } 1661 } 1662 return restrictions; 1663 } 1664 1665 private void writeApplicationRestrictionsLocked(String packageName, 1666 Bundle restrictions, int userId) { 1667 FileOutputStream fos = null; 1668 AtomicFile restrictionsFile = new AtomicFile( 1669 new File(Environment.getUserSystemDirectory(userId), 1670 packageToRestrictionsFileName(packageName))); 1671 try { 1672 fos = restrictionsFile.startWrite(); 1673 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1674 1675 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1676 final XmlSerializer serializer = new FastXmlSerializer(); 1677 serializer.setOutput(bos, "utf-8"); 1678 serializer.startDocument(null, true); 1679 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1680 1681 serializer.startTag(null, TAG_RESTRICTIONS); 1682 1683 for (String key : restrictions.keySet()) { 1684 Object value = restrictions.get(key); 1685 serializer.startTag(null, TAG_ENTRY); 1686 serializer.attribute(null, ATTR_KEY, key); 1687 1688 if (value instanceof Boolean) { 1689 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1690 serializer.text(value.toString()); 1691 } else if (value instanceof Integer) { 1692 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1693 serializer.text(value.toString()); 1694 } else if (value == null || value instanceof String) { 1695 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1696 serializer.text(value != null ? (String) value : ""); 1697 } else { 1698 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1699 String[] values = (String[]) value; 1700 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1701 for (String choice : values) { 1702 serializer.startTag(null, TAG_VALUE); 1703 serializer.text(choice != null ? choice : ""); 1704 serializer.endTag(null, TAG_VALUE); 1705 } 1706 } 1707 serializer.endTag(null, TAG_ENTRY); 1708 } 1709 1710 serializer.endTag(null, TAG_RESTRICTIONS); 1711 1712 serializer.endDocument(); 1713 restrictionsFile.finishWrite(fos); 1714 } catch (Exception e) { 1715 restrictionsFile.failWrite(fos); 1716 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1717 } 1718 } 1719 1720 @Override 1721 public int getUserSerialNumber(int userHandle) { 1722 synchronized (mPackagesLock) { 1723 if (!exists(userHandle)) return -1; 1724 return getUserInfoLocked(userHandle).serialNumber; 1725 } 1726 } 1727 1728 @Override 1729 public int getUserHandle(int userSerialNumber) { 1730 synchronized (mPackagesLock) { 1731 for (int userId : mUserIds) { 1732 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1733 } 1734 // Not found 1735 return -1; 1736 } 1737 } 1738 1739 /** 1740 * Caches the list of user ids in an array, adjusting the array size when necessary. 1741 */ 1742 private void updateUserIdsLocked() { 1743 int num = 0; 1744 for (int i = 0; i < mUsers.size(); i++) { 1745 if (!mUsers.valueAt(i).partial) { 1746 num++; 1747 } 1748 } 1749 final int[] newUsers = new int[num]; 1750 int n = 0; 1751 for (int i = 0; i < mUsers.size(); i++) { 1752 if (!mUsers.valueAt(i).partial) { 1753 newUsers[n++] = mUsers.keyAt(i); 1754 } 1755 } 1756 mUserIds = newUsers; 1757 } 1758 1759 /** 1760 * Make a note of the last started time of a user and do some cleanup. 1761 * @param userId the user that was just foregrounded 1762 */ 1763 public void userForeground(int userId) { 1764 synchronized (mPackagesLock) { 1765 UserInfo user = mUsers.get(userId); 1766 long now = System.currentTimeMillis(); 1767 if (user == null || user.partial) { 1768 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1769 return; 1770 } 1771 if (now > EPOCH_PLUS_30_YEARS) { 1772 user.lastLoggedInTime = now; 1773 writeUserLocked(user); 1774 } 1775 } 1776 } 1777 1778 /** 1779 * Returns the next available user id, filling in any holes in the ids. 1780 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1781 * for data and battery stats collection, or unexpected cross-talk. 1782 * @return 1783 */ 1784 private int getNextAvailableIdLocked() { 1785 synchronized (mPackagesLock) { 1786 int i = MIN_USER_ID; 1787 while (i < Integer.MAX_VALUE) { 1788 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1789 break; 1790 } 1791 i++; 1792 } 1793 return i; 1794 } 1795 } 1796 1797 private String packageToRestrictionsFileName(String packageName) { 1798 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1799 } 1800 1801 private String restrictionsFileNameToPackage(String fileName) { 1802 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1803 (int) (fileName.length() - XML_SUFFIX.length())); 1804 } 1805 1806 @Override 1807 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1808 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1809 != PackageManager.PERMISSION_GRANTED) { 1810 pw.println("Permission Denial: can't dump UserManager from from pid=" 1811 + Binder.getCallingPid() 1812 + ", uid=" + Binder.getCallingUid() 1813 + " without permission " 1814 + android.Manifest.permission.DUMP); 1815 return; 1816 } 1817 1818 long now = System.currentTimeMillis(); 1819 StringBuilder sb = new StringBuilder(); 1820 synchronized (mPackagesLock) { 1821 pw.println("Users:"); 1822 for (int i = 0; i < mUsers.size(); i++) { 1823 UserInfo user = mUsers.valueAt(i); 1824 if (user == null) continue; 1825 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1826 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1827 if (user.partial) pw.print(" <partial>"); 1828 pw.println(); 1829 pw.print(" Created: "); 1830 if (user.creationTime == 0) { 1831 pw.println("<unknown>"); 1832 } else { 1833 sb.setLength(0); 1834 TimeUtils.formatDuration(now - user.creationTime, sb); 1835 sb.append(" ago"); 1836 pw.println(sb); 1837 } 1838 pw.print(" Last logged in: "); 1839 if (user.lastLoggedInTime == 0) { 1840 pw.println("<unknown>"); 1841 } else { 1842 sb.setLength(0); 1843 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1844 sb.append(" ago"); 1845 pw.println(sb); 1846 } 1847 } 1848 } 1849 } 1850} 1851