UserManagerService.java revision 8cd28b57ed732656d002d97879e15c5695b54fff
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.Debug; 38import android.os.Environment; 39import android.os.FileUtils; 40import android.os.Handler; 41import android.os.IUserManager; 42import android.os.Process; 43import android.os.RemoteException; 44import android.os.ServiceManager; 45import android.os.UserHandle; 46import android.os.UserManager; 47import android.util.AtomicFile; 48import android.util.Log; 49import android.util.Slog; 50import android.util.SparseArray; 51import android.util.SparseBooleanArray; 52import android.util.TimeUtils; 53import android.util.Xml; 54 55import com.android.internal.app.IAppOpsService; 56import com.android.internal.util.ArrayUtils; 57import com.android.internal.util.FastXmlSerializer; 58 59import org.xmlpull.v1.XmlPullParser; 60import org.xmlpull.v1.XmlPullParserException; 61import org.xmlpull.v1.XmlSerializer; 62 63import java.io.BufferedOutputStream; 64import java.io.File; 65import java.io.FileDescriptor; 66import java.io.FileInputStream; 67import java.io.FileNotFoundException; 68import java.io.FileOutputStream; 69import java.io.IOException; 70import java.io.PrintWriter; 71import java.security.MessageDigest; 72import java.security.NoSuchAlgorithmException; 73import java.security.SecureRandom; 74import java.util.ArrayList; 75import java.util.List; 76 77public class UserManagerService extends IUserManager.Stub { 78 79 private static final String LOG_TAG = "UserManagerService"; 80 81 private static final boolean DBG = false; 82 83 private static final String TAG_NAME = "name"; 84 private static final String ATTR_FLAGS = "flags"; 85 private static final String ATTR_ICON_PATH = "icon"; 86 private static final String ATTR_ID = "id"; 87 private static final String ATTR_CREATION_TIME = "created"; 88 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 89 private static final String ATTR_SALT = "salt"; 90 private static final String ATTR_PIN_HASH = "pinHash"; 91 private static final String ATTR_FAILED_ATTEMPTS = "failedAttempts"; 92 private static final String ATTR_LAST_RETRY_MS = "lastAttemptMs"; 93 private static final String ATTR_SERIAL_NO = "serialNumber"; 94 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 95 private static final String ATTR_PARTIAL = "partial"; 96 private static final String ATTR_USER_VERSION = "version"; 97 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 98 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 99 private static final String TAG_USERS = "users"; 100 private static final String TAG_USER = "user"; 101 private static final String TAG_RESTRICTIONS = "restrictions"; 102 private static final String TAG_ENTRY = "entry"; 103 private static final String TAG_VALUE = "value"; 104 private static final String ATTR_KEY = "key"; 105 private static final String ATTR_VALUE_TYPE = "type"; 106 private static final String ATTR_MULTIPLE = "m"; 107 108 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 109 private static final String ATTR_TYPE_STRING = "s"; 110 private static final String ATTR_TYPE_BOOLEAN = "b"; 111 private static final String ATTR_TYPE_INTEGER = "i"; 112 113 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 114 private static final String USER_LIST_FILENAME = "userlist.xml"; 115 private static final String USER_PHOTO_FILENAME = "photo.png"; 116 117 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 118 private static final String XML_SUFFIX = ".xml"; 119 120 private static final int MIN_USER_ID = 10; 121 122 private static final int USER_VERSION = 4; 123 124 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 125 126 // Number of attempts before jumping to the next BACKOFF_TIMES slot 127 private static final int BACKOFF_INC_INTERVAL = 5; 128 129 // Maximum number of managed profiles permitted is 1. This cannot be increased 130 // without first making sure that the rest of the framework is prepared for it. 131 private static final int MAX_MANAGED_PROFILES = 1; 132 133 // Amount of time to force the user to wait before entering the PIN again, after failing 134 // BACKOFF_INC_INTERVAL times. 135 private static final int[] BACKOFF_TIMES = { 0, 30*1000, 60*1000, 5*60*1000, 30*60*1000 }; 136 137 138 private final Context mContext; 139 private final PackageManagerService mPm; 140 private final Object mInstallLock; 141 private final Object mPackagesLock; 142 143 private final Handler mHandler; 144 145 private final File mUsersDir; 146 private final File mUserListFile; 147 private final File mBaseUserPath; 148 149 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 150 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 151 private final Bundle mGuestRestrictions = new Bundle(); 152 153 class RestrictionsPinState { 154 long salt; 155 String pinHash; 156 int failedAttempts; 157 long lastAttemptTime; 158 } 159 160 private final SparseArray<RestrictionsPinState> mRestrictionsPinStates = 161 new SparseArray<RestrictionsPinState>(); 162 163 /** 164 * Set of user IDs being actively removed. Removed IDs linger in this set 165 * for several seconds to work around a VFS caching issue. 166 */ 167 // @GuardedBy("mPackagesLock") 168 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 169 170 private int[] mUserIds; 171 private int mNextSerialNumber; 172 private int mUserVersion = 0; 173 174 private IAppOpsService mAppOpsService; 175 176 private static UserManagerService sInstance; 177 178 public static UserManagerService getInstance() { 179 synchronized (UserManagerService.class) { 180 return sInstance; 181 } 182 } 183 184 /** 185 * Available for testing purposes. 186 */ 187 UserManagerService(File dataDir, File baseUserPath) { 188 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 189 } 190 191 /** 192 * Called by package manager to create the service. This is closely 193 * associated with the package manager, and the given lock is the 194 * package manager's own lock. 195 */ 196 UserManagerService(Context context, PackageManagerService pm, 197 Object installLock, Object packagesLock) { 198 this(context, pm, installLock, packagesLock, 199 Environment.getDataDirectory(), 200 new File(Environment.getDataDirectory(), "user")); 201 } 202 203 /** 204 * Available for testing purposes. 205 */ 206 private UserManagerService(Context context, PackageManagerService pm, 207 Object installLock, Object packagesLock, 208 File dataDir, File baseUserPath) { 209 mContext = context; 210 mPm = pm; 211 mInstallLock = installLock; 212 mPackagesLock = packagesLock; 213 mHandler = new Handler(); 214 synchronized (mInstallLock) { 215 synchronized (mPackagesLock) { 216 mUsersDir = new File(dataDir, USER_INFO_DIR); 217 mUsersDir.mkdirs(); 218 // Make zeroth user directory, for services to migrate their files to that location 219 File userZeroDir = new File(mUsersDir, "0"); 220 userZeroDir.mkdirs(); 221 mBaseUserPath = baseUserPath; 222 FileUtils.setPermissions(mUsersDir.toString(), 223 FileUtils.S_IRWXU|FileUtils.S_IRWXG 224 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 225 -1, -1); 226 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 227 readUserListLocked(); 228 // Prune out any partially created/partially removed users. 229 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 230 for (int i = 0; i < mUsers.size(); i++) { 231 UserInfo ui = mUsers.valueAt(i); 232 if (ui.partial && i != 0) { 233 partials.add(ui); 234 } 235 } 236 for (int i = 0; i < partials.size(); i++) { 237 UserInfo ui = partials.get(i); 238 Slog.w(LOG_TAG, "Removing partially created user #" + i 239 + " (name=" + ui.name + ")"); 240 removeUserStateLocked(ui.id); 241 } 242 sInstance = this; 243 } 244 } 245 } 246 247 void systemReady() { 248 userForeground(UserHandle.USER_OWNER); 249 mAppOpsService = IAppOpsService.Stub.asInterface( 250 ServiceManager.getService(Context.APP_OPS_SERVICE)); 251 for (int i = 0; i < mUserIds.length; ++i) { 252 try { 253 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 254 } catch (RemoteException e) { 255 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 256 } 257 } 258 } 259 260 @Override 261 public List<UserInfo> getUsers(boolean excludeDying) { 262 checkManageUsersPermission("query users"); 263 synchronized (mPackagesLock) { 264 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 265 for (int i = 0; i < mUsers.size(); i++) { 266 UserInfo ui = mUsers.valueAt(i); 267 if (ui.partial) { 268 continue; 269 } 270 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 271 users.add(ui); 272 } 273 } 274 return users; 275 } 276 } 277 278 @Override 279 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 280 if (userId != UserHandle.getCallingUserId()) { 281 checkManageUsersPermission("getting profiles related to user " + userId); 282 } 283 final long ident = Binder.clearCallingIdentity(); 284 try { 285 synchronized (mPackagesLock) { 286 return getProfilesLocked(userId, enabledOnly); 287 } 288 } finally { 289 Binder.restoreCallingIdentity(ident); 290 } 291 } 292 293 /** Assume permissions already checked and caller's identity cleared */ 294 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 295 UserInfo user = getUserInfoLocked(userId); 296 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 297 if (user == null) { 298 // Probably a dying user 299 return users; 300 } 301 for (int i = 0; i < mUsers.size(); i++) { 302 UserInfo profile = mUsers.valueAt(i); 303 if (!isProfileOf(user, profile)) { 304 continue; 305 } 306 if (enabledOnly && !profile.isEnabled()) { 307 continue; 308 } 309 if (mRemovingUserIds.get(profile.id)) { 310 continue; 311 } 312 users.add(profile); 313 } 314 return users; 315 } 316 317 @Override 318 public UserInfo getProfileParent(int userHandle) { 319 checkManageUsersPermission("get the profile parent"); 320 synchronized (mPackagesLock) { 321 UserInfo profile = getUserInfoLocked(userHandle); 322 int parentUserId = profile.profileGroupId; 323 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 324 return null; 325 } else { 326 return getUserInfoLocked(parentUserId); 327 } 328 } 329 } 330 331 private boolean isProfileOf(UserInfo user, UserInfo profile) { 332 return user.id == profile.id || 333 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 334 && user.profileGroupId == profile.profileGroupId); 335 } 336 337 @Override 338 public void setUserEnabled(int userId) { 339 checkManageUsersPermission("enable user"); 340 synchronized (mPackagesLock) { 341 UserInfo info = getUserInfoLocked(userId); 342 if (info != null && !info.isEnabled()) { 343 info.flags ^= UserInfo.FLAG_DISABLED; 344 writeUserLocked(info); 345 } 346 } 347 } 348 349 @Override 350 public UserInfo getUserInfo(int userId) { 351 checkManageUsersPermission("query user"); 352 synchronized (mPackagesLock) { 353 return getUserInfoLocked(userId); 354 } 355 } 356 357 @Override 358 public boolean isRestricted() { 359 synchronized (mPackagesLock) { 360 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 361 } 362 } 363 364 /* 365 * Should be locked on mUsers before calling this. 366 */ 367 private UserInfo getUserInfoLocked(int userId) { 368 UserInfo ui = mUsers.get(userId); 369 // If it is partial and not in the process of being removed, return as unknown user. 370 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 371 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 372 return null; 373 } 374 return ui; 375 } 376 377 public boolean exists(int userId) { 378 synchronized (mPackagesLock) { 379 return ArrayUtils.contains(mUserIds, userId); 380 } 381 } 382 383 @Override 384 public void setUserName(int userId, String name) { 385 checkManageUsersPermission("rename users"); 386 boolean changed = false; 387 synchronized (mPackagesLock) { 388 UserInfo info = mUsers.get(userId); 389 if (info == null || info.partial) { 390 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 391 return; 392 } 393 if (name != null && !name.equals(info.name)) { 394 info.name = name; 395 writeUserLocked(info); 396 changed = true; 397 } 398 } 399 if (changed) { 400 sendUserInfoChangedBroadcast(userId); 401 } 402 } 403 404 @Override 405 public void setUserIcon(int userId, Bitmap bitmap) { 406 checkManageUsersPermission("update users"); 407 long ident = Binder.clearCallingIdentity(); 408 try { 409 synchronized (mPackagesLock) { 410 UserInfo info = mUsers.get(userId); 411 if (info == null || info.partial) { 412 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 413 return; 414 } 415 writeBitmapLocked(info, bitmap); 416 writeUserLocked(info); 417 } 418 sendUserInfoChangedBroadcast(userId); 419 } finally { 420 Binder.restoreCallingIdentity(ident); 421 } 422 } 423 424 private void sendUserInfoChangedBroadcast(int userId) { 425 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 426 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 427 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 428 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 429 } 430 431 @Override 432 public Bitmap getUserIcon(int userId) { 433 synchronized (mPackagesLock) { 434 UserInfo info = mUsers.get(userId); 435 if (info == null || info.partial) { 436 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 437 return null; 438 } 439 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 440 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 441 || callingGroupId != info.profileGroupId) { 442 checkManageUsersPermission("get the icon of a user who is not related"); 443 } 444 if (info.iconPath == null) { 445 return null; 446 } 447 return BitmapFactory.decodeFile(info.iconPath); 448 } 449 } 450 451 public void makeInitialized(int userId) { 452 checkManageUsersPermission("makeInitialized"); 453 synchronized (mPackagesLock) { 454 UserInfo info = mUsers.get(userId); 455 if (info == null || info.partial) { 456 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 457 } 458 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 459 info.flags |= UserInfo.FLAG_INITIALIZED; 460 writeUserLocked(info); 461 } 462 } 463 } 464 465 @Override 466 public Bundle getDefaultGuestRestrictions() { 467 checkManageUsersPermission("getDefaultGuestRestrictions"); 468 synchronized (mPackagesLock) { 469 return new Bundle(mGuestRestrictions); 470 } 471 } 472 473 @Override 474 public void setDefaultGuestRestrictions(Bundle restrictions) { 475 checkManageUsersPermission("setDefaultGuestRestrictions"); 476 synchronized (mPackagesLock) { 477 mGuestRestrictions.clear(); 478 mGuestRestrictions.putAll(restrictions); 479 writeUserListLocked(); 480 } 481 } 482 483 @Override 484 public boolean hasUserRestriction(String restrictionKey, int userId) { 485 synchronized (mPackagesLock) { 486 Bundle restrictions = mUserRestrictions.get(userId); 487 return restrictions != null ? restrictions.getBoolean(restrictionKey) : false; 488 } 489 } 490 491 @Override 492 public Bundle getUserRestrictions(int userId) { 493 // checkManageUsersPermission("getUserRestrictions"); 494 495 synchronized (mPackagesLock) { 496 Bundle restrictions = mUserRestrictions.get(userId); 497 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 498 } 499 } 500 501 @Override 502 public void setUserRestrictions(Bundle restrictions, int userId) { 503 checkManageUsersPermission("setUserRestrictions"); 504 if (restrictions == null) return; 505 506 synchronized (mPackagesLock) { 507 mUserRestrictions.get(userId).clear(); 508 mUserRestrictions.get(userId).putAll(restrictions); 509 long token = Binder.clearCallingIdentity(); 510 try { 511 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 512 } catch (RemoteException e) { 513 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 514 } finally { 515 Binder.restoreCallingIdentity(token); 516 } 517 writeUserLocked(mUsers.get(userId)); 518 } 519 } 520 521 /** 522 * Check if we've hit the limit of how many users can be created. 523 */ 524 private boolean isUserLimitReachedLocked() { 525 int aliveUserCount = 0; 526 final int totalUserCount = mUsers.size(); 527 // Skip over users being removed 528 for (int i = 0; i < totalUserCount; i++) { 529 UserInfo user = mUsers.valueAt(i); 530 if (!mRemovingUserIds.get(user.id) 531 && !user.isGuest() && !user.partial) { 532 aliveUserCount++; 533 } 534 } 535 return aliveUserCount >= UserManager.getMaxSupportedUsers(); 536 } 537 538 /** 539 * Enforces that only the system UID or root's UID or apps that have the 540 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 541 * permission can make certain calls to the UserManager. 542 * 543 * @param message used as message if SecurityException is thrown 544 * @throws SecurityException if the caller is not system or root 545 */ 546 private static final void checkManageUsersPermission(String message) { 547 final int uid = Binder.getCallingUid(); 548 if (uid != Process.SYSTEM_UID && uid != 0 549 && ActivityManager.checkComponentPermission( 550 android.Manifest.permission.MANAGE_USERS, 551 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 552 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 553 } 554 } 555 556 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 557 try { 558 File dir = new File(mUsersDir, Integer.toString(info.id)); 559 File file = new File(dir, USER_PHOTO_FILENAME); 560 if (!dir.exists()) { 561 dir.mkdir(); 562 FileUtils.setPermissions( 563 dir.getPath(), 564 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 565 -1, -1); 566 } 567 FileOutputStream os; 568 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 569 info.iconPath = file.getAbsolutePath(); 570 } 571 try { 572 os.close(); 573 } catch (IOException ioe) { 574 // What the ... ! 575 } 576 } catch (FileNotFoundException e) { 577 Slog.w(LOG_TAG, "Error setting photo for user ", e); 578 } 579 } 580 581 /** 582 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 583 * cache it elsewhere. 584 * @return the array of user ids. 585 */ 586 public int[] getUserIds() { 587 synchronized (mPackagesLock) { 588 return mUserIds; 589 } 590 } 591 592 int[] getUserIdsLPr() { 593 return mUserIds; 594 } 595 596 private void readUserListLocked() { 597 if (!mUserListFile.exists()) { 598 fallbackToSingleUserLocked(); 599 return; 600 } 601 FileInputStream fis = null; 602 AtomicFile userListFile = new AtomicFile(mUserListFile); 603 try { 604 fis = userListFile.openRead(); 605 XmlPullParser parser = Xml.newPullParser(); 606 parser.setInput(fis, null); 607 int type; 608 while ((type = parser.next()) != XmlPullParser.START_TAG 609 && type != XmlPullParser.END_DOCUMENT) { 610 ; 611 } 612 613 if (type != XmlPullParser.START_TAG) { 614 Slog.e(LOG_TAG, "Unable to read user list"); 615 fallbackToSingleUserLocked(); 616 return; 617 } 618 619 mNextSerialNumber = -1; 620 if (parser.getName().equals(TAG_USERS)) { 621 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 622 if (lastSerialNumber != null) { 623 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 624 } 625 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 626 if (versionNumber != null) { 627 mUserVersion = Integer.parseInt(versionNumber); 628 } 629 } 630 631 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 632 if (type == XmlPullParser.START_TAG) { 633 final String name = parser.getName(); 634 if (name.equals(TAG_USER)) { 635 String id = parser.getAttributeValue(null, ATTR_ID); 636 UserInfo user = readUserLocked(Integer.parseInt(id)); 637 638 if (user != null) { 639 mUsers.put(user.id, user); 640 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 641 mNextSerialNumber = user.id + 1; 642 } 643 } 644 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 645 mGuestRestrictions.clear(); 646 readRestrictionsLocked(parser, mGuestRestrictions); 647 } 648 } 649 } 650 updateUserIdsLocked(); 651 upgradeIfNecessaryLocked(); 652 } catch (IOException ioe) { 653 fallbackToSingleUserLocked(); 654 } catch (XmlPullParserException pe) { 655 fallbackToSingleUserLocked(); 656 } finally { 657 if (fis != null) { 658 try { 659 fis.close(); 660 } catch (IOException e) { 661 } 662 } 663 } 664 } 665 666 /** 667 * Upgrade steps between versions, either for fixing bugs or changing the data format. 668 */ 669 private void upgradeIfNecessaryLocked() { 670 int userVersion = mUserVersion; 671 if (userVersion < 1) { 672 // Assign a proper name for the owner, if not initialized correctly before 673 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 674 if ("Primary".equals(user.name)) { 675 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 676 writeUserLocked(user); 677 } 678 userVersion = 1; 679 } 680 681 if (userVersion < 2) { 682 // Owner should be marked as initialized 683 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 684 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 685 user.flags |= UserInfo.FLAG_INITIALIZED; 686 writeUserLocked(user); 687 } 688 userVersion = 2; 689 } 690 691 692 if (userVersion < 4) { 693 userVersion = 4; 694 } 695 696 if (userVersion < USER_VERSION) { 697 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 698 + USER_VERSION); 699 } else { 700 mUserVersion = userVersion; 701 writeUserListLocked(); 702 } 703 } 704 705 private void fallbackToSingleUserLocked() { 706 // Create the primary user 707 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 708 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 709 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 710 mUsers.put(0, primary); 711 mNextSerialNumber = MIN_USER_ID; 712 mUserVersion = USER_VERSION; 713 714 Bundle restrictions = new Bundle(); 715 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 716 717 updateUserIdsLocked(); 718 719 writeUserListLocked(); 720 writeUserLocked(primary); 721 } 722 723 /* 724 * Writes the user file in this format: 725 * 726 * <user flags="20039023" id="0"> 727 * <name>Primary</name> 728 * </user> 729 */ 730 private void writeUserLocked(UserInfo userInfo) { 731 FileOutputStream fos = null; 732 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 733 try { 734 fos = userFile.startWrite(); 735 final BufferedOutputStream bos = new BufferedOutputStream(fos); 736 737 // XmlSerializer serializer = XmlUtils.serializerInstance(); 738 final XmlSerializer serializer = new FastXmlSerializer(); 739 serializer.setOutput(bos, "utf-8"); 740 serializer.startDocument(null, true); 741 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 742 743 serializer.startTag(null, TAG_USER); 744 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 745 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 746 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 747 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 748 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 749 Long.toString(userInfo.lastLoggedInTime)); 750 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 751 if (pinState != null) { 752 if (pinState.salt != 0) { 753 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 754 } 755 if (pinState.pinHash != null) { 756 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 757 } 758 if (pinState.failedAttempts != 0) { 759 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 760 Integer.toString(pinState.failedAttempts)); 761 serializer.attribute(null, ATTR_LAST_RETRY_MS, 762 Long.toString(pinState.lastAttemptTime)); 763 } 764 } 765 if (userInfo.iconPath != null) { 766 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 767 } 768 if (userInfo.partial) { 769 serializer.attribute(null, ATTR_PARTIAL, "true"); 770 } 771 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 772 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 773 Integer.toString(userInfo.profileGroupId)); 774 } 775 776 serializer.startTag(null, TAG_NAME); 777 serializer.text(userInfo.name); 778 serializer.endTag(null, TAG_NAME); 779 Bundle restrictions = mUserRestrictions.get(userInfo.id); 780 if (restrictions != null) { 781 writeRestrictionsLocked(serializer, restrictions); 782 } 783 serializer.endTag(null, TAG_USER); 784 785 serializer.endDocument(); 786 userFile.finishWrite(fos); 787 } catch (Exception ioe) { 788 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 789 userFile.failWrite(fos); 790 } 791 } 792 793 /* 794 * Writes the user list file in this format: 795 * 796 * <users nextSerialNumber="3"> 797 * <user id="0"></user> 798 * <user id="2"></user> 799 * </users> 800 */ 801 private void writeUserListLocked() { 802 FileOutputStream fos = null; 803 AtomicFile userListFile = new AtomicFile(mUserListFile); 804 try { 805 fos = userListFile.startWrite(); 806 final BufferedOutputStream bos = new BufferedOutputStream(fos); 807 808 // XmlSerializer serializer = XmlUtils.serializerInstance(); 809 final XmlSerializer serializer = new FastXmlSerializer(); 810 serializer.setOutput(bos, "utf-8"); 811 serializer.startDocument(null, true); 812 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 813 814 serializer.startTag(null, TAG_USERS); 815 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 816 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 817 818 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 819 writeRestrictionsLocked(serializer, mGuestRestrictions); 820 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 821 for (int i = 0; i < mUsers.size(); i++) { 822 UserInfo user = mUsers.valueAt(i); 823 serializer.startTag(null, TAG_USER); 824 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 825 serializer.endTag(null, TAG_USER); 826 } 827 828 serializer.endTag(null, TAG_USERS); 829 830 serializer.endDocument(); 831 userListFile.finishWrite(fos); 832 } catch (Exception e) { 833 userListFile.failWrite(fos); 834 Slog.e(LOG_TAG, "Error writing user list"); 835 } 836 } 837 838 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 839 throws IOException { 840 serializer.startTag(null, TAG_RESTRICTIONS); 841 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 842 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 843 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 844 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 845 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 846 writeBoolean(serializer, restrictions, 847 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 848 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 849 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 850 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 851 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 852 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 853 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 854 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 855 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 856 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 857 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 858 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 859 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 860 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 861 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 862 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 863 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 864 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 865 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 866 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 867 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 868 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 869 serializer.endTag(null, TAG_RESTRICTIONS); 870 } 871 872 private UserInfo readUserLocked(int id) { 873 int flags = 0; 874 int serialNumber = id; 875 String name = null; 876 String iconPath = null; 877 long creationTime = 0L; 878 long lastLoggedInTime = 0L; 879 long salt = 0L; 880 String pinHash = null; 881 int failedAttempts = 0; 882 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 883 long lastAttemptTime = 0L; 884 boolean partial = false; 885 Bundle restrictions = new Bundle(); 886 887 FileInputStream fis = null; 888 try { 889 AtomicFile userFile = 890 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 891 fis = userFile.openRead(); 892 XmlPullParser parser = Xml.newPullParser(); 893 parser.setInput(fis, null); 894 int type; 895 while ((type = parser.next()) != XmlPullParser.START_TAG 896 && type != XmlPullParser.END_DOCUMENT) { 897 ; 898 } 899 900 if (type != XmlPullParser.START_TAG) { 901 Slog.e(LOG_TAG, "Unable to read user " + id); 902 return null; 903 } 904 905 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 906 int storedId = readIntAttribute(parser, ATTR_ID, -1); 907 if (storedId != id) { 908 Slog.e(LOG_TAG, "User id does not match the file name"); 909 return null; 910 } 911 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 912 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 913 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 914 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 915 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 916 salt = readLongAttribute(parser, ATTR_SALT, 0L); 917 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 918 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 919 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 920 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 921 UserInfo.NO_PROFILE_GROUP_ID); 922 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 923 // This attribute was added and renamed during development of L. 924 // TODO Remove upgrade path by 1st May 2014 925 profileGroupId = readIntAttribute(parser, "relatedGroupId", 926 UserInfo.NO_PROFILE_GROUP_ID); 927 } 928 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 929 if ("true".equals(valueString)) { 930 partial = true; 931 } 932 933 int outerDepth = parser.getDepth(); 934 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 935 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 936 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 937 continue; 938 } 939 String tag = parser.getName(); 940 if (TAG_NAME.equals(tag)) { 941 type = parser.next(); 942 if (type == XmlPullParser.TEXT) { 943 name = parser.getText(); 944 } 945 } else if (TAG_RESTRICTIONS.equals(tag)) { 946 readRestrictionsLocked(parser, restrictions); 947 } 948 } 949 } 950 951 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 952 userInfo.serialNumber = serialNumber; 953 userInfo.creationTime = creationTime; 954 userInfo.lastLoggedInTime = lastLoggedInTime; 955 userInfo.partial = partial; 956 userInfo.profileGroupId = profileGroupId; 957 mUserRestrictions.append(id, restrictions); 958 if (salt != 0L) { 959 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 960 if (pinState == null) { 961 pinState = new RestrictionsPinState(); 962 mRestrictionsPinStates.put(id, pinState); 963 } 964 pinState.salt = salt; 965 pinState.pinHash = pinHash; 966 pinState.failedAttempts = failedAttempts; 967 pinState.lastAttemptTime = lastAttemptTime; 968 } 969 return userInfo; 970 971 } catch (IOException ioe) { 972 } catch (XmlPullParserException pe) { 973 } finally { 974 if (fis != null) { 975 try { 976 fis.close(); 977 } catch (IOException e) { 978 } 979 } 980 } 981 return null; 982 } 983 984 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 985 throws IOException { 986 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 987 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 988 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 989 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 990 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 991 readBoolean(parser, restrictions, 992 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 993 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 994 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 995 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 996 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 997 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 998 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 999 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1000 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1001 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1002 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1003 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1004 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1005 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1006 readBoolean(parser, restrictions, 1007 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1008 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1009 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1010 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1011 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1012 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1013 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1014 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1015 } 1016 1017 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1018 String restrictionKey) { 1019 String value = parser.getAttributeValue(null, restrictionKey); 1020 if (value != null) { 1021 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1022 } 1023 } 1024 1025 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1026 throws IOException { 1027 if (restrictions.containsKey(restrictionKey)) { 1028 xml.attribute(null, restrictionKey, 1029 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1030 } 1031 } 1032 1033 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1034 String valueString = parser.getAttributeValue(null, attr); 1035 if (valueString == null) return defaultValue; 1036 try { 1037 return Integer.parseInt(valueString); 1038 } catch (NumberFormatException nfe) { 1039 return defaultValue; 1040 } 1041 } 1042 1043 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1044 String valueString = parser.getAttributeValue(null, attr); 1045 if (valueString == null) return defaultValue; 1046 try { 1047 return Long.parseLong(valueString); 1048 } catch (NumberFormatException nfe) { 1049 return defaultValue; 1050 } 1051 } 1052 1053 private boolean isPackageInstalled(String pkg, int userId) { 1054 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1055 PackageManager.GET_UNINSTALLED_PACKAGES, 1056 userId); 1057 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1058 return false; 1059 } 1060 return true; 1061 } 1062 1063 /** 1064 * Removes all the restrictions files (res_<packagename>) for a given user. 1065 * Does not do any permissions checking. 1066 */ 1067 private void cleanAppRestrictions(int userId) { 1068 synchronized (mPackagesLock) { 1069 File dir = Environment.getUserSystemDirectory(userId); 1070 String[] files = dir.list(); 1071 if (files == null) return; 1072 for (String fileName : files) { 1073 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1074 File resFile = new File(dir, fileName); 1075 if (resFile.exists()) { 1076 resFile.delete(); 1077 } 1078 } 1079 } 1080 } 1081 } 1082 1083 /** 1084 * Removes the app restrictions file for a specific package and user id, if it exists. 1085 */ 1086 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1087 synchronized (mPackagesLock) { 1088 File dir = Environment.getUserSystemDirectory(userId); 1089 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1090 if (resFile.exists()) { 1091 resFile.delete(); 1092 } 1093 } 1094 } 1095 1096 @Override 1097 public UserInfo createProfileForUser(String name, int flags, int userId) { 1098 checkManageUsersPermission("Only the system can create users"); 1099 if (userId != UserHandle.USER_OWNER) { 1100 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1101 return null; 1102 } 1103 return createUserInternal(name, flags, userId); 1104 } 1105 1106 @Override 1107 public UserInfo createUser(String name, int flags) { 1108 checkManageUsersPermission("Only the system can create users"); 1109 return createUserInternal(name, flags, UserHandle.USER_NULL); 1110 } 1111 1112 private UserInfo createUserInternal(String name, int flags, int parentId) { 1113 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1114 UserManager.DISALLOW_ADD_USER, false)) { 1115 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1116 return null; 1117 } 1118 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1119 final long ident = Binder.clearCallingIdentity(); 1120 UserInfo userInfo = null; 1121 try { 1122 synchronized (mInstallLock) { 1123 synchronized (mPackagesLock) { 1124 UserInfo parent = null; 1125 if (parentId != UserHandle.USER_NULL) { 1126 parent = getUserInfoLocked(parentId); 1127 if (parent == null) return null; 1128 } 1129 // If we're not adding a guest user and the limit has been reached, 1130 // cannot add a user. 1131 if (!isGuest && isUserLimitReachedLocked()) { 1132 return null; 1133 } 1134 // If we're adding a guest and there already exists one, bail. 1135 if (isGuest && numberOfUsersOfTypeLocked(UserInfo.FLAG_GUEST, true) > 0) { 1136 return null; 1137 } 1138 // Limit number of managed profiles that can be created 1139 if ((flags & UserInfo.FLAG_MANAGED_PROFILE) != 0 1140 && numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 1141 >= MAX_MANAGED_PROFILES) { 1142 return null; 1143 } 1144 int userId = getNextAvailableIdLocked(); 1145 userInfo = new UserInfo(userId, name, null, flags); 1146 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1147 userInfo.serialNumber = mNextSerialNumber++; 1148 long now = System.currentTimeMillis(); 1149 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1150 userInfo.partial = true; 1151 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1152 mUsers.put(userId, userInfo); 1153 writeUserListLocked(); 1154 if (parent != null) { 1155 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1156 parent.profileGroupId = parent.id; 1157 writeUserLocked(parent); 1158 } 1159 userInfo.profileGroupId = parent.profileGroupId; 1160 } 1161 writeUserLocked(userInfo); 1162 mPm.createNewUserLILPw(userId, userPath); 1163 userInfo.partial = false; 1164 writeUserLocked(userInfo); 1165 updateUserIdsLocked(); 1166 Bundle restrictions = new Bundle(); 1167 mUserRestrictions.append(userId, restrictions); 1168 } 1169 } 1170 if (userInfo != null) { 1171 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1172 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1173 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1174 android.Manifest.permission.MANAGE_USERS); 1175 } 1176 } finally { 1177 Binder.restoreCallingIdentity(ident); 1178 } 1179 return userInfo; 1180 } 1181 1182 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1183 int count = 0; 1184 for (int i = mUsers.size() - 1; i >= 0; i--) { 1185 UserInfo user = mUsers.valueAt(i); 1186 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1187 if ((user.flags & flags) != 0) { 1188 count++; 1189 } 1190 } 1191 } 1192 return count; 1193 } 1194 1195 /** 1196 * Mark this guest user for deletion to allow us to create another guest 1197 * and switch to that user before actually removing this guest. 1198 * @param userHandle the userid of the current guest 1199 * @return whether the user could be marked for deletion 1200 */ 1201 public boolean markGuestForDeletion(int userHandle) { 1202 checkManageUsersPermission("Only the system can remove users"); 1203 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1204 UserManager.DISALLOW_REMOVE_USER, false)) { 1205 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1206 return false; 1207 } 1208 1209 long ident = Binder.clearCallingIdentity(); 1210 try { 1211 final UserInfo user; 1212 synchronized (mPackagesLock) { 1213 user = mUsers.get(userHandle); 1214 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1215 return false; 1216 } 1217 if (!user.isGuest()) { 1218 return false; 1219 } 1220 // Set this to a partially created user, so that the user will be purged 1221 // on next startup, in case the runtime stops now before stopping and 1222 // removing the user completely. 1223 user.partial = true; 1224 // Mark it as disabled, so that it isn't returned any more when 1225 // profiles are queried. 1226 user.flags |= UserInfo.FLAG_DISABLED; 1227 user.flags &= ~UserInfo.FLAG_GUEST; 1228 writeUserLocked(user); 1229 } 1230 } finally { 1231 Binder.restoreCallingIdentity(ident); 1232 } 1233 return true; 1234 } 1235 1236 /** 1237 * Removes a user and all data directories created for that user. This method should be called 1238 * after the user's processes have been terminated. 1239 * @param userHandle the user's id 1240 */ 1241 public boolean removeUser(int userHandle) { 1242 checkManageUsersPermission("Only the system can remove users"); 1243 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1244 UserManager.DISALLOW_REMOVE_USER, false)) { 1245 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1246 return false; 1247 } 1248 1249 long ident = Binder.clearCallingIdentity(); 1250 try { 1251 final UserInfo user; 1252 synchronized (mPackagesLock) { 1253 user = mUsers.get(userHandle); 1254 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1255 return false; 1256 } 1257 mRemovingUserIds.put(userHandle, true); 1258 try { 1259 mAppOpsService.removeUser(userHandle); 1260 } catch (RemoteException e) { 1261 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1262 } 1263 // Set this to a partially created user, so that the user will be purged 1264 // on next startup, in case the runtime stops now before stopping and 1265 // removing the user completely. 1266 user.partial = true; 1267 // Mark it as disabled, so that it isn't returned any more when 1268 // profiles are queried. 1269 user.flags |= UserInfo.FLAG_DISABLED; 1270 writeUserLocked(user); 1271 } 1272 1273 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1274 && user.isManagedProfile()) { 1275 // Send broadcast to notify system that the user removed was a 1276 // managed user. 1277 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1278 } 1279 1280 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1281 int res; 1282 try { 1283 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1284 new IStopUserCallback.Stub() { 1285 @Override 1286 public void userStopped(int userId) { 1287 finishRemoveUser(userId); 1288 } 1289 @Override 1290 public void userStopAborted(int userId) { 1291 } 1292 }); 1293 } catch (RemoteException e) { 1294 return false; 1295 } 1296 return res == ActivityManager.USER_OP_SUCCESS; 1297 } finally { 1298 Binder.restoreCallingIdentity(ident); 1299 } 1300 } 1301 1302 void finishRemoveUser(final int userHandle) { 1303 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1304 // Let other services shutdown any activity and clean up their state before completely 1305 // wiping the user's system directory and removing from the user list 1306 long ident = Binder.clearCallingIdentity(); 1307 try { 1308 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1309 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1310 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1311 android.Manifest.permission.MANAGE_USERS, 1312 1313 new BroadcastReceiver() { 1314 @Override 1315 public void onReceive(Context context, Intent intent) { 1316 if (DBG) { 1317 Slog.i(LOG_TAG, 1318 "USER_REMOVED broadcast sent, cleaning up user data " 1319 + userHandle); 1320 } 1321 new Thread() { 1322 public void run() { 1323 synchronized (mInstallLock) { 1324 synchronized (mPackagesLock) { 1325 removeUserStateLocked(userHandle); 1326 } 1327 } 1328 } 1329 }.start(); 1330 } 1331 }, 1332 1333 null, Activity.RESULT_OK, null, null); 1334 } finally { 1335 Binder.restoreCallingIdentity(ident); 1336 } 1337 } 1338 1339 private void removeUserStateLocked(final int userHandle) { 1340 // Cleanup package manager settings 1341 mPm.cleanUpUserLILPw(this, userHandle); 1342 1343 // Remove this user from the list 1344 mUsers.remove(userHandle); 1345 1346 // Have user ID linger for several seconds to let external storage VFS 1347 // cache entries expire. This must be greater than the 'entry_valid' 1348 // timeout used by the FUSE daemon. 1349 mHandler.postDelayed(new Runnable() { 1350 @Override 1351 public void run() { 1352 synchronized (mPackagesLock) { 1353 mRemovingUserIds.delete(userHandle); 1354 } 1355 } 1356 }, MINUTE_IN_MILLIS); 1357 1358 mRestrictionsPinStates.remove(userHandle); 1359 // Remove user file 1360 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1361 userFile.delete(); 1362 // Update the user list 1363 writeUserListLocked(); 1364 updateUserIdsLocked(); 1365 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1366 } 1367 1368 private void removeDirectoryRecursive(File parent) { 1369 if (parent.isDirectory()) { 1370 String[] files = parent.list(); 1371 for (String filename : files) { 1372 File child = new File(parent, filename); 1373 removeDirectoryRecursive(child); 1374 } 1375 } 1376 parent.delete(); 1377 } 1378 1379 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1380 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1381 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1382 Intent.FLAG_RECEIVER_FOREGROUND); 1383 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1384 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1385 } 1386 1387 @Override 1388 public Bundle getApplicationRestrictions(String packageName) { 1389 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1390 } 1391 1392 @Override 1393 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1394 if (UserHandle.getCallingUserId() != userId 1395 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1396 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1397 } 1398 synchronized (mPackagesLock) { 1399 // Read the restrictions from XML 1400 return readApplicationRestrictionsLocked(packageName, userId); 1401 } 1402 } 1403 1404 @Override 1405 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1406 int userId) { 1407 if (UserHandle.getCallingUserId() != userId 1408 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1409 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1410 } 1411 synchronized (mPackagesLock) { 1412 if (restrictions == null || restrictions.isEmpty()) { 1413 cleanAppRestrictionsForPackage(packageName, userId); 1414 } else { 1415 // Write the restrictions to XML 1416 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1417 } 1418 } 1419 1420 if (isPackageInstalled(packageName, userId)) { 1421 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1422 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1423 changeIntent.setPackage(packageName); 1424 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1425 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1426 } 1427 } 1428 1429 @Override 1430 public boolean setRestrictionsChallenge(String newPin) { 1431 checkManageUsersPermission("Only system can modify the restrictions pin"); 1432 int userId = UserHandle.getCallingUserId(); 1433 synchronized (mPackagesLock) { 1434 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1435 if (pinState == null) { 1436 pinState = new RestrictionsPinState(); 1437 } 1438 if (newPin == null) { 1439 pinState.salt = 0; 1440 pinState.pinHash = null; 1441 } else { 1442 try { 1443 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1444 } catch (NoSuchAlgorithmException e) { 1445 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1446 } 1447 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1448 pinState.failedAttempts = 0; 1449 } 1450 mRestrictionsPinStates.put(userId, pinState); 1451 writeUserLocked(mUsers.get(userId)); 1452 } 1453 return true; 1454 } 1455 1456 @Override 1457 public int checkRestrictionsChallenge(String pin) { 1458 checkManageUsersPermission("Only system can verify the restrictions pin"); 1459 int userId = UserHandle.getCallingUserId(); 1460 synchronized (mPackagesLock) { 1461 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1462 // If there's no pin set, return error code 1463 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1464 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1465 } else if (pin == null) { 1466 // If just checking if user can be prompted, return remaining time 1467 int waitTime = getRemainingTimeForPinAttempt(pinState); 1468 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1469 return waitTime; 1470 } else { 1471 int waitTime = getRemainingTimeForPinAttempt(pinState); 1472 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1473 if (waitTime > 0) { 1474 return waitTime; 1475 } 1476 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1477 pinState.failedAttempts = 0; 1478 writeUserLocked(mUsers.get(userId)); 1479 return UserManager.PIN_VERIFICATION_SUCCESS; 1480 } else { 1481 pinState.failedAttempts++; 1482 pinState.lastAttemptTime = System.currentTimeMillis(); 1483 writeUserLocked(mUsers.get(userId)); 1484 return waitTime; 1485 } 1486 } 1487 } 1488 } 1489 1490 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1491 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1492 BACKOFF_TIMES.length - 1); 1493 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1494 BACKOFF_TIMES[backoffIndex] : 0; 1495 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1496 0); 1497 } 1498 1499 @Override 1500 public boolean hasRestrictionsChallenge() { 1501 int userId = UserHandle.getCallingUserId(); 1502 synchronized (mPackagesLock) { 1503 return hasRestrictionsPinLocked(userId); 1504 } 1505 } 1506 1507 private boolean hasRestrictionsPinLocked(int userId) { 1508 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1509 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1510 return false; 1511 } 1512 return true; 1513 } 1514 1515 @Override 1516 public void removeRestrictions() { 1517 checkManageUsersPermission("Only system can remove restrictions"); 1518 final int userHandle = UserHandle.getCallingUserId(); 1519 removeRestrictionsForUser(userHandle, true); 1520 } 1521 1522 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1523 synchronized (mPackagesLock) { 1524 // Remove all user restrictions 1525 setUserRestrictions(new Bundle(), userHandle); 1526 // Remove restrictions pin 1527 setRestrictionsChallenge(null); 1528 // Remove any app restrictions 1529 cleanAppRestrictions(userHandle); 1530 } 1531 if (unhideApps) { 1532 unhideAllInstalledAppsForUser(userHandle); 1533 } 1534 } 1535 1536 private void unhideAllInstalledAppsForUser(final int userHandle) { 1537 mHandler.post(new Runnable() { 1538 @Override 1539 public void run() { 1540 List<ApplicationInfo> apps = 1541 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1542 userHandle).getList(); 1543 final long ident = Binder.clearCallingIdentity(); 1544 try { 1545 for (ApplicationInfo appInfo : apps) { 1546 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1547 && (appInfo.flags & ApplicationInfo.FLAG_HIDDEN) != 0) { 1548 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1549 userHandle); 1550 } 1551 } 1552 } finally { 1553 Binder.restoreCallingIdentity(ident); 1554 } 1555 } 1556 }); 1557 } 1558 1559 /* 1560 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1561 * Not the most secure, but it is at least a second level of protection. First level is that 1562 * the file is in a location only readable by the system process. 1563 * @param password the password. 1564 * @param salt the randomly generated salt 1565 * @return the hash of the pattern in a String. 1566 */ 1567 private String passwordToHash(String password, long salt) { 1568 if (password == null) { 1569 return null; 1570 } 1571 String algo = null; 1572 String hashed = salt + password; 1573 try { 1574 byte[] saltedPassword = (password + salt).getBytes(); 1575 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1576 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1577 hashed = toHex(sha1) + toHex(md5); 1578 } catch (NoSuchAlgorithmException e) { 1579 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1580 } 1581 return hashed; 1582 } 1583 1584 private static String toHex(byte[] ary) { 1585 final String hex = "0123456789ABCDEF"; 1586 String ret = ""; 1587 for (int i = 0; i < ary.length; i++) { 1588 ret += hex.charAt((ary[i] >> 4) & 0xf); 1589 ret += hex.charAt(ary[i] & 0xf); 1590 } 1591 return ret; 1592 } 1593 1594 private int getUidForPackage(String packageName) { 1595 long ident = Binder.clearCallingIdentity(); 1596 try { 1597 return mContext.getPackageManager().getApplicationInfo(packageName, 1598 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1599 } catch (NameNotFoundException nnfe) { 1600 return -1; 1601 } finally { 1602 Binder.restoreCallingIdentity(ident); 1603 } 1604 } 1605 1606 private Bundle readApplicationRestrictionsLocked(String packageName, 1607 int userId) { 1608 final Bundle restrictions = new Bundle(); 1609 final ArrayList<String> values = new ArrayList<String>(); 1610 1611 FileInputStream fis = null; 1612 try { 1613 AtomicFile restrictionsFile = 1614 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1615 packageToRestrictionsFileName(packageName))); 1616 fis = restrictionsFile.openRead(); 1617 XmlPullParser parser = Xml.newPullParser(); 1618 parser.setInput(fis, null); 1619 int type; 1620 while ((type = parser.next()) != XmlPullParser.START_TAG 1621 && type != XmlPullParser.END_DOCUMENT) { 1622 ; 1623 } 1624 1625 if (type != XmlPullParser.START_TAG) { 1626 Slog.e(LOG_TAG, "Unable to read restrictions file " 1627 + restrictionsFile.getBaseFile()); 1628 return restrictions; 1629 } 1630 1631 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1632 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1633 String key = parser.getAttributeValue(null, ATTR_KEY); 1634 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1635 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1636 if (multiple != null) { 1637 values.clear(); 1638 int count = Integer.parseInt(multiple); 1639 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1640 if (type == XmlPullParser.START_TAG 1641 && parser.getName().equals(TAG_VALUE)) { 1642 values.add(parser.nextText().trim()); 1643 count--; 1644 } 1645 } 1646 String [] valueStrings = new String[values.size()]; 1647 values.toArray(valueStrings); 1648 restrictions.putStringArray(key, valueStrings); 1649 } else { 1650 String value = parser.nextText().trim(); 1651 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1652 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1653 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1654 restrictions.putInt(key, Integer.parseInt(value)); 1655 } else { 1656 restrictions.putString(key, value); 1657 } 1658 } 1659 } 1660 } 1661 } catch (IOException ioe) { 1662 } catch (XmlPullParserException pe) { 1663 } finally { 1664 if (fis != null) { 1665 try { 1666 fis.close(); 1667 } catch (IOException e) { 1668 } 1669 } 1670 } 1671 return restrictions; 1672 } 1673 1674 private void writeApplicationRestrictionsLocked(String packageName, 1675 Bundle restrictions, int userId) { 1676 FileOutputStream fos = null; 1677 AtomicFile restrictionsFile = new AtomicFile( 1678 new File(Environment.getUserSystemDirectory(userId), 1679 packageToRestrictionsFileName(packageName))); 1680 try { 1681 fos = restrictionsFile.startWrite(); 1682 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1683 1684 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1685 final XmlSerializer serializer = new FastXmlSerializer(); 1686 serializer.setOutput(bos, "utf-8"); 1687 serializer.startDocument(null, true); 1688 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1689 1690 serializer.startTag(null, TAG_RESTRICTIONS); 1691 1692 for (String key : restrictions.keySet()) { 1693 Object value = restrictions.get(key); 1694 serializer.startTag(null, TAG_ENTRY); 1695 serializer.attribute(null, ATTR_KEY, key); 1696 1697 if (value instanceof Boolean) { 1698 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1699 serializer.text(value.toString()); 1700 } else if (value instanceof Integer) { 1701 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1702 serializer.text(value.toString()); 1703 } else if (value == null || value instanceof String) { 1704 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1705 serializer.text(value != null ? (String) value : ""); 1706 } else { 1707 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1708 String[] values = (String[]) value; 1709 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1710 for (String choice : values) { 1711 serializer.startTag(null, TAG_VALUE); 1712 serializer.text(choice != null ? choice : ""); 1713 serializer.endTag(null, TAG_VALUE); 1714 } 1715 } 1716 serializer.endTag(null, TAG_ENTRY); 1717 } 1718 1719 serializer.endTag(null, TAG_RESTRICTIONS); 1720 1721 serializer.endDocument(); 1722 restrictionsFile.finishWrite(fos); 1723 } catch (Exception e) { 1724 restrictionsFile.failWrite(fos); 1725 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1726 } 1727 } 1728 1729 @Override 1730 public int getUserSerialNumber(int userHandle) { 1731 synchronized (mPackagesLock) { 1732 if (!exists(userHandle)) return -1; 1733 return getUserInfoLocked(userHandle).serialNumber; 1734 } 1735 } 1736 1737 @Override 1738 public int getUserHandle(int userSerialNumber) { 1739 synchronized (mPackagesLock) { 1740 for (int userId : mUserIds) { 1741 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1742 } 1743 // Not found 1744 return -1; 1745 } 1746 } 1747 1748 /** 1749 * Caches the list of user ids in an array, adjusting the array size when necessary. 1750 */ 1751 private void updateUserIdsLocked() { 1752 int num = 0; 1753 for (int i = 0; i < mUsers.size(); i++) { 1754 if (!mUsers.valueAt(i).partial) { 1755 num++; 1756 } 1757 } 1758 final int[] newUsers = new int[num]; 1759 int n = 0; 1760 for (int i = 0; i < mUsers.size(); i++) { 1761 if (!mUsers.valueAt(i).partial) { 1762 newUsers[n++] = mUsers.keyAt(i); 1763 } 1764 } 1765 mUserIds = newUsers; 1766 } 1767 1768 /** 1769 * Make a note of the last started time of a user and do some cleanup. 1770 * @param userId the user that was just foregrounded 1771 */ 1772 public void userForeground(int userId) { 1773 synchronized (mPackagesLock) { 1774 UserInfo user = mUsers.get(userId); 1775 long now = System.currentTimeMillis(); 1776 if (user == null || user.partial) { 1777 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1778 return; 1779 } 1780 if (now > EPOCH_PLUS_30_YEARS) { 1781 user.lastLoggedInTime = now; 1782 writeUserLocked(user); 1783 } 1784 } 1785 } 1786 1787 /** 1788 * Returns the next available user id, filling in any holes in the ids. 1789 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1790 * for data and battery stats collection, or unexpected cross-talk. 1791 * @return 1792 */ 1793 private int getNextAvailableIdLocked() { 1794 synchronized (mPackagesLock) { 1795 int i = MIN_USER_ID; 1796 while (i < Integer.MAX_VALUE) { 1797 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1798 break; 1799 } 1800 i++; 1801 } 1802 return i; 1803 } 1804 } 1805 1806 private String packageToRestrictionsFileName(String packageName) { 1807 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1808 } 1809 1810 private String restrictionsFileNameToPackage(String fileName) { 1811 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1812 (int) (fileName.length() - XML_SUFFIX.length())); 1813 } 1814 1815 @Override 1816 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1817 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1818 != PackageManager.PERMISSION_GRANTED) { 1819 pw.println("Permission Denial: can't dump UserManager from from pid=" 1820 + Binder.getCallingPid() 1821 + ", uid=" + Binder.getCallingUid() 1822 + " without permission " 1823 + android.Manifest.permission.DUMP); 1824 return; 1825 } 1826 1827 long now = System.currentTimeMillis(); 1828 StringBuilder sb = new StringBuilder(); 1829 synchronized (mPackagesLock) { 1830 pw.println("Users:"); 1831 for (int i = 0; i < mUsers.size(); i++) { 1832 UserInfo user = mUsers.valueAt(i); 1833 if (user == null) continue; 1834 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1835 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1836 if (user.partial) pw.print(" <partial>"); 1837 pw.println(); 1838 pw.print(" Created: "); 1839 if (user.creationTime == 0) { 1840 pw.println("<unknown>"); 1841 } else { 1842 sb.setLength(0); 1843 TimeUtils.formatDuration(now - user.creationTime, sb); 1844 sb.append(" ago"); 1845 pw.println(sb); 1846 } 1847 pw.print(" Last logged in: "); 1848 if (user.lastLoggedInTime == 0) { 1849 pw.println("<unknown>"); 1850 } else { 1851 sb.setLength(0); 1852 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1853 sb.append(" ago"); 1854 pw.println(sb); 1855 } 1856 } 1857 } 1858 } 1859} 1860