UserManagerService.java revision 70f6c38644a4a6e28c016c265e6987bf00dd61f1
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.pm; 18 19import android.app.Activity; 20import android.app.ActivityManager; 21import android.app.ActivityManagerNative; 22import android.app.IStopUserCallback; 23import android.content.BroadcastReceiver; 24import android.content.Context; 25import android.content.Intent; 26import android.content.pm.ApplicationInfo; 27import android.content.pm.PackageManager; 28import android.content.pm.PackageManager.NameNotFoundException; 29import android.content.pm.UserInfo; 30import android.graphics.Bitmap; 31import android.os.Binder; 32import android.os.Bundle; 33import android.os.Environment; 34import android.os.FileUtils; 35import android.os.Handler; 36import android.os.IUserManager; 37import android.os.Message; 38import android.os.ParcelFileDescriptor; 39import android.os.Parcelable; 40import android.os.Process; 41import android.os.RemoteException; 42import android.os.ServiceManager; 43import android.os.UserHandle; 44import android.os.UserManager; 45import android.os.storage.StorageManager; 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.google.android.collect.Sets; 55 56import com.android.internal.annotations.VisibleForTesting; 57import com.android.internal.app.IAppOpsService; 58import com.android.internal.util.ArrayUtils; 59import com.android.internal.util.FastXmlSerializer; 60import com.android.internal.util.XmlUtils; 61 62import org.xmlpull.v1.XmlPullParser; 63import org.xmlpull.v1.XmlPullParserException; 64import org.xmlpull.v1.XmlSerializer; 65 66import java.io.BufferedOutputStream; 67import java.io.File; 68import java.io.FileDescriptor; 69import java.io.FileInputStream; 70import java.io.FileNotFoundException; 71import java.io.FileOutputStream; 72import java.io.IOException; 73import java.io.PrintWriter; 74import java.nio.charset.StandardCharsets; 75import java.util.ArrayList; 76import java.util.List; 77import java.util.Set; 78 79import libcore.io.IoUtils; 80 81public class UserManagerService extends IUserManager.Stub { 82 83 private static final String LOG_TAG = "UserManagerService"; 84 85 private static final boolean DBG = false; 86 87 private static final String TAG_NAME = "name"; 88 private static final String ATTR_FLAGS = "flags"; 89 private static final String ATTR_ICON_PATH = "icon"; 90 private static final String ATTR_ID = "id"; 91 private static final String ATTR_CREATION_TIME = "created"; 92 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 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_GUEST_TO_REMOVE = "guestToRemove"; 97 private static final String ATTR_USER_VERSION = "version"; 98 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 99 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 100 private static final String TAG_USERS = "users"; 101 private static final String TAG_USER = "user"; 102 private static final String TAG_RESTRICTIONS = "restrictions"; 103 private static final String TAG_ENTRY = "entry"; 104 private static final String TAG_VALUE = "value"; 105 private static final String ATTR_KEY = "key"; 106 private static final String ATTR_VALUE_TYPE = "type"; 107 private static final String ATTR_MULTIPLE = "m"; 108 109 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 110 private static final String ATTR_TYPE_STRING = "s"; 111 private static final String ATTR_TYPE_BOOLEAN = "b"; 112 private static final String ATTR_TYPE_INTEGER = "i"; 113 private static final String ATTR_TYPE_BUNDLE = "B"; 114 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 115 116 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 117 private static final String USER_LIST_FILENAME = "userlist.xml"; 118 private static final String USER_PHOTO_FILENAME = "photo.png"; 119 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 120 121 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 122 private static final String XML_SUFFIX = ".xml"; 123 124 private static final int MIN_USER_ID = 10; 125 126 private static final int USER_VERSION = 5; 127 128 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 129 130 // Maximum number of managed profiles permitted is 1. This cannot be increased 131 // without first making sure that the rest of the framework is prepared for it. 132 private static final int MAX_MANAGED_PROFILES = 1; 133 134 // Set of user restrictions, which can only be enforced by the system 135 private static final Set<String> SYSTEM_CONTROLLED_RESTRICTIONS = Sets.newArraySet( 136 UserManager.DISALLOW_RECORD_AUDIO); 137 138 static final int WRITE_USER_MSG = 1; 139 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 140 141 private final Context mContext; 142 private final PackageManagerService mPm; 143 private final Object mInstallLock; 144 private final Object mPackagesLock; 145 146 private final Handler mHandler; 147 148 private final File mUsersDir; 149 private final File mUserListFile; 150 private final File mBaseUserPath; 151 152 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 153 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 154 private final Bundle mGuestRestrictions = new Bundle(); 155 156 /** 157 * Set of user IDs being actively removed. Removed IDs linger in this set 158 * for several seconds to work around a VFS caching issue. 159 */ 160 // @GuardedBy("mPackagesLock") 161 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 162 163 private int[] mUserIds; 164 private int mNextSerialNumber; 165 private int mUserVersion = 0; 166 167 private IAppOpsService mAppOpsService; 168 169 private static UserManagerService sInstance; 170 171 public static UserManagerService getInstance() { 172 synchronized (UserManagerService.class) { 173 return sInstance; 174 } 175 } 176 177 /** 178 * Available for testing purposes. 179 */ 180 UserManagerService(File dataDir, File baseUserPath) { 181 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 182 } 183 184 /** 185 * Called by package manager to create the service. This is closely 186 * associated with the package manager, and the given lock is the 187 * package manager's own lock. 188 */ 189 UserManagerService(Context context, PackageManagerService pm, 190 Object installLock, Object packagesLock) { 191 this(context, pm, installLock, packagesLock, 192 Environment.getDataDirectory(), 193 new File(Environment.getDataDirectory(), "user")); 194 } 195 196 /** 197 * Available for testing purposes. 198 */ 199 private UserManagerService(Context context, PackageManagerService pm, 200 Object installLock, Object packagesLock, 201 File dataDir, File baseUserPath) { 202 mContext = context; 203 mPm = pm; 204 mInstallLock = installLock; 205 mPackagesLock = packagesLock; 206 mHandler = new MainHandler(); 207 synchronized (mInstallLock) { 208 synchronized (mPackagesLock) { 209 mUsersDir = new File(dataDir, USER_INFO_DIR); 210 mUsersDir.mkdirs(); 211 // Make zeroth user directory, for services to migrate their files to that location 212 File userZeroDir = new File(mUsersDir, String.valueOf(UserHandle.USER_SYSTEM)); 213 userZeroDir.mkdirs(); 214 mBaseUserPath = baseUserPath; 215 FileUtils.setPermissions(mUsersDir.toString(), 216 FileUtils.S_IRWXU|FileUtils.S_IRWXG 217 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 218 -1, -1); 219 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 220 initDefaultGuestRestrictions(); 221 readUserListLocked(); 222 sInstance = this; 223 } 224 } 225 } 226 227 void systemReady() { 228 synchronized (mInstallLock) { 229 synchronized (mPackagesLock) { 230 // Prune out any partially created/partially removed users. 231 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 232 for (int i = 0; i < mUsers.size(); i++) { 233 UserInfo ui = mUsers.valueAt(i); 234 if ((ui.partial || ui.guestToRemove) && i != 0) { 235 partials.add(ui); 236 } 237 } 238 for (int i = 0; i < partials.size(); i++) { 239 UserInfo ui = partials.get(i); 240 Slog.w(LOG_TAG, "Removing partially created user #" + i 241 + " (name=" + ui.name + ")"); 242 removeUserStateLocked(ui.id); 243 } 244 } 245 } 246 onUserForeground(UserHandle.USER_SYSTEM); 247 mAppOpsService = IAppOpsService.Stub.asInterface( 248 ServiceManager.getService(Context.APP_OPS_SERVICE)); 249 for (int i = 0; i < mUserIds.length; ++i) { 250 try { 251 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 252 } catch (RemoteException e) { 253 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 254 } 255 } 256 } 257 258 @Override 259 public UserInfo getPrimaryUser() { 260 checkManageUsersPermission("query users"); 261 synchronized (mPackagesLock) { 262 for (int i = 0; i < mUsers.size(); i++) { 263 UserInfo ui = mUsers.valueAt(i); 264 if (ui.isPrimary()) { 265 return ui; 266 } 267 } 268 } 269 return null; 270 } 271 272 @Override 273 public List<UserInfo> getUsers(boolean excludeDying) { 274 checkManageUsersPermission("query users"); 275 synchronized (mPackagesLock) { 276 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 277 for (int i = 0; i < mUsers.size(); i++) { 278 UserInfo ui = mUsers.valueAt(i); 279 if (ui.partial) { 280 continue; 281 } 282 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 283 users.add(ui); 284 } 285 } 286 return users; 287 } 288 } 289 290 @Override 291 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 292 if (userId != UserHandle.getCallingUserId()) { 293 checkManageUsersPermission("getting profiles related to user " + userId); 294 } 295 final long ident = Binder.clearCallingIdentity(); 296 try { 297 synchronized (mPackagesLock) { 298 return getProfilesLocked(userId, enabledOnly); 299 } 300 } finally { 301 Binder.restoreCallingIdentity(ident); 302 } 303 } 304 305 /** Assume permissions already checked and caller's identity cleared */ 306 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 307 UserInfo user = getUserInfoLocked(userId); 308 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 309 if (user == null) { 310 // Probably a dying user 311 return users; 312 } 313 for (int i = 0; i < mUsers.size(); i++) { 314 UserInfo profile = mUsers.valueAt(i); 315 if (!isProfileOf(user, profile)) { 316 continue; 317 } 318 if (enabledOnly && !profile.isEnabled()) { 319 continue; 320 } 321 if (mRemovingUserIds.get(profile.id)) { 322 continue; 323 } 324 users.add(profile); 325 } 326 return users; 327 } 328 329 @Override 330 public UserInfo getProfileParent(int userHandle) { 331 checkManageUsersPermission("get the profile parent"); 332 synchronized (mPackagesLock) { 333 return getProfileParentLocked(userHandle); 334 } 335 } 336 337 private UserInfo getProfileParentLocked(int userHandle) { 338 UserInfo profile = getUserInfoLocked(userHandle); 339 if (profile == null) { 340 return null; 341 } 342 int parentUserId = profile.profileGroupId; 343 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 344 return null; 345 } else { 346 return getUserInfoLocked(parentUserId); 347 } 348 } 349 350 private boolean isProfileOf(UserInfo user, UserInfo profile) { 351 return user.id == profile.id || 352 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 353 && user.profileGroupId == profile.profileGroupId); 354 } 355 356 @Override 357 public void setUserEnabled(int userId) { 358 checkManageUsersPermission("enable user"); 359 synchronized (mPackagesLock) { 360 UserInfo info = getUserInfoLocked(userId); 361 if (info != null && !info.isEnabled()) { 362 info.flags ^= UserInfo.FLAG_DISABLED; 363 writeUserLocked(info); 364 } 365 } 366 } 367 368 @Override 369 public UserInfo getUserInfo(int userId) { 370 checkManageUsersPermission("query user"); 371 synchronized (mPackagesLock) { 372 return getUserInfoLocked(userId); 373 } 374 } 375 376 @Override 377 public boolean isRestricted() { 378 synchronized (mPackagesLock) { 379 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 380 } 381 } 382 383 /* 384 * Should be locked on mUsers before calling this. 385 */ 386 private UserInfo getUserInfoLocked(int userId) { 387 UserInfo ui = mUsers.get(userId); 388 // If it is partial and not in the process of being removed, return as unknown user. 389 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 390 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 391 return null; 392 } 393 return ui; 394 } 395 396 public boolean exists(int userId) { 397 synchronized (mPackagesLock) { 398 return ArrayUtils.contains(mUserIds, userId); 399 } 400 } 401 402 @Override 403 public void setUserName(int userId, String name) { 404 checkManageUsersPermission("rename users"); 405 boolean changed = false; 406 synchronized (mPackagesLock) { 407 UserInfo info = mUsers.get(userId); 408 if (info == null || info.partial) { 409 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 410 return; 411 } 412 if (name != null && !name.equals(info.name)) { 413 info.name = name; 414 writeUserLocked(info); 415 changed = true; 416 } 417 } 418 if (changed) { 419 sendUserInfoChangedBroadcast(userId); 420 } 421 } 422 423 @Override 424 public void setUserIcon(int userId, Bitmap bitmap) { 425 checkManageUsersPermission("update users"); 426 long ident = Binder.clearCallingIdentity(); 427 try { 428 synchronized (mPackagesLock) { 429 UserInfo info = mUsers.get(userId); 430 if (info == null || info.partial) { 431 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 432 return; 433 } 434 writeBitmapLocked(info, bitmap); 435 writeUserLocked(info); 436 } 437 sendUserInfoChangedBroadcast(userId); 438 } finally { 439 Binder.restoreCallingIdentity(ident); 440 } 441 } 442 443 private void sendUserInfoChangedBroadcast(int userId) { 444 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 445 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 446 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 447 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 448 } 449 450 @Override 451 public ParcelFileDescriptor getUserIcon(int userId) { 452 String iconPath; 453 synchronized (mPackagesLock) { 454 UserInfo info = mUsers.get(userId); 455 if (info == null || info.partial) { 456 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 457 return null; 458 } 459 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 460 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 461 || callingGroupId != info.profileGroupId) { 462 checkManageUsersPermission("get the icon of a user who is not related"); 463 } 464 if (info.iconPath == null) { 465 return null; 466 } 467 iconPath = info.iconPath; 468 } 469 470 try { 471 return ParcelFileDescriptor.open( 472 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 473 } catch (FileNotFoundException e) { 474 Log.e(LOG_TAG, "Couldn't find icon file", e); 475 } 476 return null; 477 } 478 479 public void makeInitialized(int userId) { 480 checkManageUsersPermission("makeInitialized"); 481 synchronized (mPackagesLock) { 482 UserInfo info = mUsers.get(userId); 483 if (info == null || info.partial) { 484 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 485 } 486 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 487 info.flags |= UserInfo.FLAG_INITIALIZED; 488 scheduleWriteUserLocked(info); 489 } 490 } 491 } 492 493 /** 494 * If default guest restrictions haven't been initialized yet, add the basic 495 * restrictions. 496 */ 497 private void initDefaultGuestRestrictions() { 498 if (mGuestRestrictions.isEmpty()) { 499 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 500 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 501 } 502 } 503 504 @Override 505 public Bundle getDefaultGuestRestrictions() { 506 checkManageUsersPermission("getDefaultGuestRestrictions"); 507 synchronized (mPackagesLock) { 508 return new Bundle(mGuestRestrictions); 509 } 510 } 511 512 @Override 513 public void setDefaultGuestRestrictions(Bundle restrictions) { 514 checkManageUsersPermission("setDefaultGuestRestrictions"); 515 synchronized (mPackagesLock) { 516 mGuestRestrictions.clear(); 517 mGuestRestrictions.putAll(restrictions); 518 writeUserListLocked(); 519 } 520 } 521 522 @Override 523 public boolean hasUserRestriction(String restrictionKey, int userId) { 524 synchronized (mPackagesLock) { 525 Bundle restrictions = mUserRestrictions.get(userId); 526 return restrictions != null && restrictions.getBoolean(restrictionKey); 527 } 528 } 529 530 @Override 531 public Bundle getUserRestrictions(int userId) { 532 // checkManageUsersPermission("getUserRestrictions"); 533 534 synchronized (mPackagesLock) { 535 Bundle restrictions = mUserRestrictions.get(userId); 536 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 537 } 538 } 539 540 @Override 541 public void setUserRestriction(String key, boolean value, int userId) { 542 synchronized (mPackagesLock) { 543 if (!SYSTEM_CONTROLLED_RESTRICTIONS.contains(key)) { 544 Bundle restrictions = getUserRestrictions(userId); 545 restrictions.putBoolean(key, value); 546 setUserRestrictionsInternalLocked(restrictions, userId); 547 } 548 } 549 } 550 551 @Override 552 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 553 checkSystemOrRoot("setSystemControlledUserRestriction"); 554 synchronized (mPackagesLock) { 555 Bundle restrictions = getUserRestrictions(userId); 556 restrictions.putBoolean(key, value); 557 setUserRestrictionsInternalLocked(restrictions, userId); 558 } 559 } 560 561 @Override 562 public void setUserRestrictions(Bundle restrictions, int userId) { 563 checkManageUsersPermission("setUserRestrictions"); 564 if (restrictions == null) return; 565 566 synchronized (mPackagesLock) { 567 final Bundle oldUserRestrictions = mUserRestrictions.get(userId); 568 // Restore the original state of system controlled restrictions from oldUserRestrictions 569 for (String key : SYSTEM_CONTROLLED_RESTRICTIONS) { 570 restrictions.remove(key); 571 if (oldUserRestrictions.containsKey(key)) { 572 restrictions.putBoolean(key, oldUserRestrictions.getBoolean(key)); 573 } 574 } 575 setUserRestrictionsInternalLocked(restrictions, userId); 576 } 577 } 578 579 private void setUserRestrictionsInternalLocked(Bundle restrictions, int userId) { 580 final Bundle userRestrictions = mUserRestrictions.get(userId); 581 userRestrictions.clear(); 582 userRestrictions.putAll(restrictions); 583 long token = Binder.clearCallingIdentity(); 584 try { 585 mAppOpsService.setUserRestrictions(userRestrictions, userId); 586 } catch (RemoteException e) { 587 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 588 } finally { 589 Binder.restoreCallingIdentity(token); 590 } 591 scheduleWriteUserLocked(mUsers.get(userId)); 592 } 593 594 /** 595 * Check if we've hit the limit of how many users can be created. 596 */ 597 private boolean isUserLimitReachedLocked() { 598 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 599 } 600 601 @Override 602 public boolean canAddMoreManagedProfiles() { 603 checkManageUsersPermission("check if more managed profiles can be added."); 604 if (ActivityManager.isLowRamDeviceStatic()) { 605 return false; 606 } 607 if (!mContext.getPackageManager().hasSystemFeature( 608 PackageManager.FEATURE_MANAGED_USERS)) { 609 return false; 610 } 611 synchronized(mPackagesLock) { 612 // Limit number of managed profiles that can be created 613 if (numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 614 >= MAX_MANAGED_PROFILES) { 615 return false; 616 } 617 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 618 // We allow creating a managed profile in the special case where there is only one user. 619 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 620 } 621 } 622 623 private int getAliveUsersExcludingGuestsCountLocked() { 624 int aliveUserCount = 0; 625 final int totalUserCount = mUsers.size(); 626 // Skip over users being removed 627 for (int i = 0; i < totalUserCount; i++) { 628 UserInfo user = mUsers.valueAt(i); 629 if (!mRemovingUserIds.get(user.id) 630 && !user.isGuest() && !user.partial) { 631 aliveUserCount++; 632 } 633 } 634 return aliveUserCount; 635 } 636 637 /** 638 * Enforces that only the system UID or root's UID or apps that have the 639 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 640 * permission can make certain calls to the UserManager. 641 * 642 * @param message used as message if SecurityException is thrown 643 * @throws SecurityException if the caller is not system or root 644 */ 645 private static final void checkManageUsersPermission(String message) { 646 final int uid = Binder.getCallingUid(); 647 if (uid != Process.SYSTEM_UID && uid != 0 648 && ActivityManager.checkComponentPermission( 649 android.Manifest.permission.MANAGE_USERS, 650 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 651 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 652 } 653 } 654 655 private static void checkSystemOrRoot(String message) { 656 final int uid = Binder.getCallingUid(); 657 if (uid != Process.SYSTEM_UID && uid != 0) { 658 throw new SecurityException("Only system may call: " + message); 659 } 660 } 661 662 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 663 try { 664 File dir = new File(mUsersDir, Integer.toString(info.id)); 665 File file = new File(dir, USER_PHOTO_FILENAME); 666 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 667 if (!dir.exists()) { 668 dir.mkdir(); 669 FileUtils.setPermissions( 670 dir.getPath(), 671 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 672 -1, -1); 673 } 674 FileOutputStream os; 675 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 676 && tmp.renameTo(file)) { 677 info.iconPath = file.getAbsolutePath(); 678 } 679 try { 680 os.close(); 681 } catch (IOException ioe) { 682 // What the ... ! 683 } 684 tmp.delete(); 685 } catch (FileNotFoundException e) { 686 Slog.w(LOG_TAG, "Error setting photo for user ", e); 687 } 688 } 689 690 /** 691 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 692 * cache it elsewhere. 693 * @return the array of user ids. 694 */ 695 public int[] getUserIds() { 696 synchronized (mPackagesLock) { 697 return mUserIds; 698 } 699 } 700 701 int[] getUserIdsLPr() { 702 return mUserIds; 703 } 704 705 private void readUserListLocked() { 706 if (!mUserListFile.exists()) { 707 fallbackToSingleUserLocked(); 708 return; 709 } 710 FileInputStream fis = null; 711 AtomicFile userListFile = new AtomicFile(mUserListFile); 712 try { 713 fis = userListFile.openRead(); 714 XmlPullParser parser = Xml.newPullParser(); 715 parser.setInput(fis, StandardCharsets.UTF_8.name()); 716 int type; 717 while ((type = parser.next()) != XmlPullParser.START_TAG 718 && type != XmlPullParser.END_DOCUMENT) { 719 ; 720 } 721 722 if (type != XmlPullParser.START_TAG) { 723 Slog.e(LOG_TAG, "Unable to read user list"); 724 fallbackToSingleUserLocked(); 725 return; 726 } 727 728 mNextSerialNumber = -1; 729 if (parser.getName().equals(TAG_USERS)) { 730 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 731 if (lastSerialNumber != null) { 732 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 733 } 734 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 735 if (versionNumber != null) { 736 mUserVersion = Integer.parseInt(versionNumber); 737 } 738 } 739 740 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 741 if (type == XmlPullParser.START_TAG) { 742 final String name = parser.getName(); 743 if (name.equals(TAG_USER)) { 744 String id = parser.getAttributeValue(null, ATTR_ID); 745 UserInfo user = readUserLocked(Integer.parseInt(id)); 746 747 if (user != null) { 748 mUsers.put(user.id, user); 749 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 750 mNextSerialNumber = user.id + 1; 751 } 752 } 753 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 754 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 755 && type != XmlPullParser.END_TAG) { 756 if (type == XmlPullParser.START_TAG) { 757 if (parser.getName().equals(TAG_RESTRICTIONS)) { 758 readRestrictionsLocked(parser, mGuestRestrictions); 759 } 760 break; 761 } 762 } 763 } 764 } 765 } 766 updateUserIdsLocked(); 767 upgradeIfNecessaryLocked(); 768 } catch (IOException ioe) { 769 fallbackToSingleUserLocked(); 770 } catch (XmlPullParserException pe) { 771 fallbackToSingleUserLocked(); 772 } finally { 773 if (fis != null) { 774 try { 775 fis.close(); 776 } catch (IOException e) { 777 } 778 } 779 } 780 } 781 782 /** 783 * Upgrade steps between versions, either for fixing bugs or changing the data format. 784 */ 785 private void upgradeIfNecessaryLocked() { 786 int userVersion = mUserVersion; 787 if (userVersion < 1) { 788 // Assign a proper name for the owner, if not initialized correctly before 789 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 790 if ("Primary".equals(user.name)) { 791 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 792 scheduleWriteUserLocked(user); 793 } 794 userVersion = 1; 795 } 796 797 if (userVersion < 2) { 798 // Owner should be marked as initialized 799 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 800 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 801 user.flags |= UserInfo.FLAG_INITIALIZED; 802 scheduleWriteUserLocked(user); 803 } 804 userVersion = 2; 805 } 806 807 808 if (userVersion < 4) { 809 userVersion = 4; 810 } 811 812 if (userVersion < 5) { 813 initDefaultGuestRestrictions(); 814 userVersion = 5; 815 } 816 817 if (userVersion < USER_VERSION) { 818 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 819 + USER_VERSION); 820 } else { 821 mUserVersion = userVersion; 822 writeUserListLocked(); 823 } 824 } 825 826 private void fallbackToSingleUserLocked() { 827 // Create the system user 828 // TODO: UserInfo.FLAG_PRIMARY flag should be set on the first human user. 829 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 830 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 831 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 832 mUsers.put(system.id, system); 833 mNextSerialNumber = MIN_USER_ID; 834 mUserVersion = USER_VERSION; 835 836 Bundle restrictions = new Bundle(); 837 mUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 838 839 updateUserIdsLocked(); 840 initDefaultGuestRestrictions(); 841 842 writeUserListLocked(); 843 writeUserLocked(system); 844 } 845 846 private void scheduleWriteUserLocked(UserInfo userInfo) { 847 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 848 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 849 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 850 } 851 } 852 853 /* 854 * Writes the user file in this format: 855 * 856 * <user flags="20039023" id="0"> 857 * <name>Primary</name> 858 * </user> 859 */ 860 private void writeUserLocked(UserInfo userInfo) { 861 FileOutputStream fos = null; 862 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 863 try { 864 fos = userFile.startWrite(); 865 final BufferedOutputStream bos = new BufferedOutputStream(fos); 866 867 // XmlSerializer serializer = XmlUtils.serializerInstance(); 868 final XmlSerializer serializer = new FastXmlSerializer(); 869 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 870 serializer.startDocument(null, true); 871 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 872 873 serializer.startTag(null, TAG_USER); 874 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 875 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 876 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 877 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 878 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 879 Long.toString(userInfo.lastLoggedInTime)); 880 if (userInfo.iconPath != null) { 881 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 882 } 883 if (userInfo.partial) { 884 serializer.attribute(null, ATTR_PARTIAL, "true"); 885 } 886 if (userInfo.guestToRemove) { 887 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 888 } 889 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 890 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 891 Integer.toString(userInfo.profileGroupId)); 892 } 893 894 serializer.startTag(null, TAG_NAME); 895 serializer.text(userInfo.name); 896 serializer.endTag(null, TAG_NAME); 897 Bundle restrictions = mUserRestrictions.get(userInfo.id); 898 if (restrictions != null) { 899 writeRestrictionsLocked(serializer, restrictions); 900 } 901 serializer.endTag(null, TAG_USER); 902 903 serializer.endDocument(); 904 userFile.finishWrite(fos); 905 } catch (Exception ioe) { 906 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 907 userFile.failWrite(fos); 908 } 909 } 910 911 /* 912 * Writes the user list file in this format: 913 * 914 * <users nextSerialNumber="3"> 915 * <user id="0"></user> 916 * <user id="2"></user> 917 * </users> 918 */ 919 private void writeUserListLocked() { 920 FileOutputStream fos = null; 921 AtomicFile userListFile = new AtomicFile(mUserListFile); 922 try { 923 fos = userListFile.startWrite(); 924 final BufferedOutputStream bos = new BufferedOutputStream(fos); 925 926 // XmlSerializer serializer = XmlUtils.serializerInstance(); 927 final XmlSerializer serializer = new FastXmlSerializer(); 928 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 929 serializer.startDocument(null, true); 930 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 931 932 serializer.startTag(null, TAG_USERS); 933 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 934 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 935 936 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 937 writeRestrictionsLocked(serializer, mGuestRestrictions); 938 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 939 for (int i = 0; i < mUsers.size(); i++) { 940 UserInfo user = mUsers.valueAt(i); 941 serializer.startTag(null, TAG_USER); 942 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 943 serializer.endTag(null, TAG_USER); 944 } 945 946 serializer.endTag(null, TAG_USERS); 947 948 serializer.endDocument(); 949 userListFile.finishWrite(fos); 950 } catch (Exception e) { 951 userListFile.failWrite(fos); 952 Slog.e(LOG_TAG, "Error writing user list"); 953 } 954 } 955 956 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 957 throws IOException { 958 serializer.startTag(null, TAG_RESTRICTIONS); 959 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 960 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 961 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 962 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 963 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 964 writeBoolean(serializer, restrictions, 965 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 966 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 967 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 968 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 969 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 970 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 971 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 972 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 973 writeBoolean(serializer, restrictions, UserManager.DISALLOW_NETWORK_RESET); 974 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 975 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 976 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 977 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 978 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 979 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 980 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 981 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 982 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 983 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 984 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 985 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FUN); 986 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 987 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 988 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 989 writeBoolean(serializer, restrictions, UserManager.DISALLOW_WALLPAPER); 990 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SAFE_BOOT); 991 writeBoolean(serializer, restrictions, UserManager.ALLOW_PARENT_APP_LINKING); 992 serializer.endTag(null, TAG_RESTRICTIONS); 993 } 994 995 private UserInfo readUserLocked(int id) { 996 int flags = 0; 997 int serialNumber = id; 998 String name = null; 999 String iconPath = null; 1000 long creationTime = 0L; 1001 long lastLoggedInTime = 0L; 1002 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1003 boolean partial = false; 1004 boolean guestToRemove = false; 1005 Bundle restrictions = new Bundle(); 1006 1007 FileInputStream fis = null; 1008 try { 1009 AtomicFile userFile = 1010 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1011 fis = userFile.openRead(); 1012 XmlPullParser parser = Xml.newPullParser(); 1013 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1014 int type; 1015 while ((type = parser.next()) != XmlPullParser.START_TAG 1016 && type != XmlPullParser.END_DOCUMENT) { 1017 ; 1018 } 1019 1020 if (type != XmlPullParser.START_TAG) { 1021 Slog.e(LOG_TAG, "Unable to read user " + id); 1022 return null; 1023 } 1024 1025 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1026 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1027 if (storedId != id) { 1028 Slog.e(LOG_TAG, "User id does not match the file name"); 1029 return null; 1030 } 1031 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1032 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1033 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1034 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1035 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1036 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1037 UserInfo.NO_PROFILE_GROUP_ID); 1038 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1039 if ("true".equals(valueString)) { 1040 partial = true; 1041 } 1042 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1043 if ("true".equals(valueString)) { 1044 guestToRemove = true; 1045 } 1046 1047 int outerDepth = parser.getDepth(); 1048 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1049 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1050 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1051 continue; 1052 } 1053 String tag = parser.getName(); 1054 if (TAG_NAME.equals(tag)) { 1055 type = parser.next(); 1056 if (type == XmlPullParser.TEXT) { 1057 name = parser.getText(); 1058 } 1059 } else if (TAG_RESTRICTIONS.equals(tag)) { 1060 readRestrictionsLocked(parser, restrictions); 1061 } 1062 } 1063 } 1064 1065 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1066 userInfo.serialNumber = serialNumber; 1067 userInfo.creationTime = creationTime; 1068 userInfo.lastLoggedInTime = lastLoggedInTime; 1069 userInfo.partial = partial; 1070 userInfo.guestToRemove = guestToRemove; 1071 userInfo.profileGroupId = profileGroupId; 1072 mUserRestrictions.append(id, restrictions); 1073 return userInfo; 1074 1075 } catch (IOException ioe) { 1076 } catch (XmlPullParserException pe) { 1077 } finally { 1078 if (fis != null) { 1079 try { 1080 fis.close(); 1081 } catch (IOException e) { 1082 } 1083 } 1084 } 1085 return null; 1086 } 1087 1088 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1089 throws IOException { 1090 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1091 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1092 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1093 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1094 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1095 readBoolean(parser, restrictions, 1096 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1097 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1098 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1099 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1100 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1101 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1102 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1103 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1104 readBoolean(parser, restrictions, UserManager.DISALLOW_NETWORK_RESET); 1105 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1106 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1107 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1108 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1109 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1110 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1111 readBoolean(parser, restrictions, 1112 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1113 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1114 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1115 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1116 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1117 readBoolean(parser, restrictions, UserManager.DISALLOW_FUN); 1118 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1119 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1120 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1121 readBoolean(parser, restrictions, UserManager.DISALLOW_WALLPAPER); 1122 readBoolean(parser, restrictions, UserManager.DISALLOW_SAFE_BOOT); 1123 readBoolean(parser, restrictions, UserManager.ALLOW_PARENT_APP_LINKING); 1124 } 1125 1126 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1127 String restrictionKey) { 1128 String value = parser.getAttributeValue(null, restrictionKey); 1129 if (value != null) { 1130 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1131 } 1132 } 1133 1134 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1135 throws IOException { 1136 if (restrictions.containsKey(restrictionKey)) { 1137 xml.attribute(null, restrictionKey, 1138 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1139 } 1140 } 1141 1142 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1143 String valueString = parser.getAttributeValue(null, attr); 1144 if (valueString == null) return defaultValue; 1145 try { 1146 return Integer.parseInt(valueString); 1147 } catch (NumberFormatException nfe) { 1148 return defaultValue; 1149 } 1150 } 1151 1152 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1153 String valueString = parser.getAttributeValue(null, attr); 1154 if (valueString == null) return defaultValue; 1155 try { 1156 return Long.parseLong(valueString); 1157 } catch (NumberFormatException nfe) { 1158 return defaultValue; 1159 } 1160 } 1161 1162 private boolean isPackageInstalled(String pkg, int userId) { 1163 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1164 PackageManager.GET_UNINSTALLED_PACKAGES, 1165 userId); 1166 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1167 return false; 1168 } 1169 return true; 1170 } 1171 1172 /** 1173 * Removes all the restrictions files (res_<packagename>) for a given user. 1174 * Does not do any permissions checking. 1175 */ 1176 private void cleanAppRestrictions(int userId) { 1177 synchronized (mPackagesLock) { 1178 File dir = Environment.getUserSystemDirectory(userId); 1179 String[] files = dir.list(); 1180 if (files == null) return; 1181 for (String fileName : files) { 1182 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1183 File resFile = new File(dir, fileName); 1184 if (resFile.exists()) { 1185 resFile.delete(); 1186 } 1187 } 1188 } 1189 } 1190 } 1191 1192 /** 1193 * Removes the app restrictions file for a specific package and user id, if it exists. 1194 */ 1195 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1196 synchronized (mPackagesLock) { 1197 File dir = Environment.getUserSystemDirectory(userId); 1198 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1199 if (resFile.exists()) { 1200 resFile.delete(); 1201 } 1202 } 1203 } 1204 1205 @Override 1206 public UserInfo createProfileForUser(String name, int flags, int userId) { 1207 checkManageUsersPermission("Only the system can create users"); 1208 if (userId != UserHandle.USER_OWNER) { 1209 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1210 return null; 1211 } 1212 return createUserInternal(name, flags, userId); 1213 } 1214 1215 @Override 1216 public UserInfo createUser(String name, int flags) { 1217 checkManageUsersPermission("Only the system can create users"); 1218 return createUserInternal(name, flags, UserHandle.USER_NULL); 1219 } 1220 1221 private UserInfo createUserInternal(String name, int flags, int parentId) { 1222 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1223 UserManager.DISALLOW_ADD_USER, false)) { 1224 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1225 return null; 1226 } 1227 if (ActivityManager.isLowRamDeviceStatic()) { 1228 return null; 1229 } 1230 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1231 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1232 final long ident = Binder.clearCallingIdentity(); 1233 UserInfo userInfo = null; 1234 try { 1235 synchronized (mInstallLock) { 1236 synchronized (mPackagesLock) { 1237 UserInfo parent = null; 1238 if (parentId != UserHandle.USER_NULL) { 1239 parent = getUserInfoLocked(parentId); 1240 if (parent == null) return null; 1241 } 1242 if (isManagedProfile && !canAddMoreManagedProfiles()) { 1243 return null; 1244 } 1245 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1246 // If we're not adding a guest user or a managed profile and the limit has 1247 // been reached, cannot add a user. 1248 return null; 1249 } 1250 // If we're adding a guest and there already exists one, bail. 1251 if (isGuest && findCurrentGuestUserLocked() != null) { 1252 return null; 1253 } 1254 int userId = getNextAvailableIdLocked(); 1255 userInfo = new UserInfo(userId, name, null, flags); 1256 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1257 userInfo.serialNumber = mNextSerialNumber++; 1258 long now = System.currentTimeMillis(); 1259 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1260 userInfo.partial = true; 1261 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1262 mUsers.put(userId, userInfo); 1263 writeUserListLocked(); 1264 if (parent != null) { 1265 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1266 parent.profileGroupId = parent.id; 1267 scheduleWriteUserLocked(parent); 1268 } 1269 userInfo.profileGroupId = parent.profileGroupId; 1270 } 1271 mPm.createNewUserLILPw(userId, userPath); 1272 userInfo.partial = false; 1273 scheduleWriteUserLocked(userInfo); 1274 updateUserIdsLocked(); 1275 Bundle restrictions = new Bundle(); 1276 mUserRestrictions.append(userId, restrictions); 1277 mPm.newUserCreatedLILPw(userId); 1278 } 1279 } 1280 if (userInfo != null) { 1281 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1282 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1283 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1284 android.Manifest.permission.MANAGE_USERS); 1285 } 1286 } finally { 1287 Binder.restoreCallingIdentity(ident); 1288 } 1289 return userInfo; 1290 } 1291 1292 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1293 int count = 0; 1294 for (int i = mUsers.size() - 1; i >= 0; i--) { 1295 UserInfo user = mUsers.valueAt(i); 1296 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1297 if ((user.flags & flags) != 0) { 1298 count++; 1299 } 1300 } 1301 } 1302 return count; 1303 } 1304 1305 /** 1306 * Find the current guest user. If the Guest user is partial, 1307 * then do not include it in the results as it is about to die. 1308 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1309 * the special handling of Guests being removed. 1310 */ 1311 private UserInfo findCurrentGuestUserLocked() { 1312 final int size = mUsers.size(); 1313 for (int i = 0; i < size; i++) { 1314 final UserInfo user = mUsers.valueAt(i); 1315 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1316 return user; 1317 } 1318 } 1319 return null; 1320 } 1321 1322 /** 1323 * Mark this guest user for deletion to allow us to create another guest 1324 * and switch to that user before actually removing this guest. 1325 * @param userHandle the userid of the current guest 1326 * @return whether the user could be marked for deletion 1327 */ 1328 public boolean markGuestForDeletion(int userHandle) { 1329 checkManageUsersPermission("Only the system can remove users"); 1330 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1331 UserManager.DISALLOW_REMOVE_USER, false)) { 1332 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1333 return false; 1334 } 1335 1336 long ident = Binder.clearCallingIdentity(); 1337 try { 1338 final UserInfo user; 1339 synchronized (mPackagesLock) { 1340 user = mUsers.get(userHandle); 1341 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1342 return false; 1343 } 1344 if (!user.isGuest()) { 1345 return false; 1346 } 1347 // We set this to a guest user that is to be removed. This is a temporary state 1348 // where we are allowed to add new Guest users, even if this one is still not 1349 // removed. This user will still show up in getUserInfo() calls. 1350 // If we don't get around to removing this Guest user, it will be purged on next 1351 // startup. 1352 user.guestToRemove = true; 1353 // Mark it as disabled, so that it isn't returned any more when 1354 // profiles are queried. 1355 user.flags |= UserInfo.FLAG_DISABLED; 1356 writeUserLocked(user); 1357 } 1358 } finally { 1359 Binder.restoreCallingIdentity(ident); 1360 } 1361 return true; 1362 } 1363 1364 /** 1365 * Removes a user and all data directories created for that user. This method should be called 1366 * after the user's processes have been terminated. 1367 * @param userHandle the user's id 1368 */ 1369 public boolean removeUser(int userHandle) { 1370 checkManageUsersPermission("Only the system can remove users"); 1371 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1372 UserManager.DISALLOW_REMOVE_USER, false)) { 1373 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1374 return false; 1375 } 1376 1377 long ident = Binder.clearCallingIdentity(); 1378 try { 1379 final UserInfo user; 1380 synchronized (mPackagesLock) { 1381 user = mUsers.get(userHandle); 1382 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1383 return false; 1384 } 1385 1386 // We remember deleted user IDs to prevent them from being 1387 // reused during the current boot; they can still be reused 1388 // after a reboot. 1389 mRemovingUserIds.put(userHandle, true); 1390 1391 try { 1392 mAppOpsService.removeUser(userHandle); 1393 } catch (RemoteException e) { 1394 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1395 } 1396 // Set this to a partially created user, so that the user will be purged 1397 // on next startup, in case the runtime stops now before stopping and 1398 // removing the user completely. 1399 user.partial = true; 1400 // Mark it as disabled, so that it isn't returned any more when 1401 // profiles are queried. 1402 user.flags |= UserInfo.FLAG_DISABLED; 1403 writeUserLocked(user); 1404 } 1405 1406 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1407 && user.isManagedProfile()) { 1408 // Send broadcast to notify system that the user removed was a 1409 // managed user. 1410 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1411 } 1412 1413 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1414 int res; 1415 try { 1416 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1417 new IStopUserCallback.Stub() { 1418 @Override 1419 public void userStopped(int userId) { 1420 finishRemoveUser(userId); 1421 } 1422 @Override 1423 public void userStopAborted(int userId) { 1424 } 1425 }); 1426 } catch (RemoteException e) { 1427 return false; 1428 } 1429 return res == ActivityManager.USER_OP_SUCCESS; 1430 } finally { 1431 Binder.restoreCallingIdentity(ident); 1432 } 1433 } 1434 1435 void finishRemoveUser(final int userHandle) { 1436 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1437 // Let other services shutdown any activity and clean up their state before completely 1438 // wiping the user's system directory and removing from the user list 1439 long ident = Binder.clearCallingIdentity(); 1440 try { 1441 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1442 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1443 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1444 android.Manifest.permission.MANAGE_USERS, 1445 1446 new BroadcastReceiver() { 1447 @Override 1448 public void onReceive(Context context, Intent intent) { 1449 if (DBG) { 1450 Slog.i(LOG_TAG, 1451 "USER_REMOVED broadcast sent, cleaning up user data " 1452 + userHandle); 1453 } 1454 new Thread() { 1455 public void run() { 1456 synchronized (mInstallLock) { 1457 synchronized (mPackagesLock) { 1458 removeUserStateLocked(userHandle); 1459 } 1460 } 1461 } 1462 }.start(); 1463 } 1464 }, 1465 1466 null, Activity.RESULT_OK, null, null); 1467 } finally { 1468 Binder.restoreCallingIdentity(ident); 1469 } 1470 } 1471 1472 private void removeUserStateLocked(final int userHandle) { 1473 mContext.getSystemService(StorageManager.class) 1474 .deleteUserKey(userHandle); 1475 // Cleanup package manager settings 1476 mPm.cleanUpUserLILPw(this, userHandle); 1477 1478 // Remove this user from the list 1479 mUsers.remove(userHandle); 1480 // Remove user file 1481 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1482 userFile.delete(); 1483 // Update the user list 1484 writeUserListLocked(); 1485 updateUserIdsLocked(); 1486 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1487 } 1488 1489 private void removeDirectoryRecursive(File parent) { 1490 if (parent.isDirectory()) { 1491 String[] files = parent.list(); 1492 for (String filename : files) { 1493 File child = new File(parent, filename); 1494 removeDirectoryRecursive(child); 1495 } 1496 } 1497 parent.delete(); 1498 } 1499 1500 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1501 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1502 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1503 Intent.FLAG_RECEIVER_FOREGROUND); 1504 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1505 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1506 } 1507 1508 @Override 1509 public Bundle getApplicationRestrictions(String packageName) { 1510 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1511 } 1512 1513 @Override 1514 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1515 if (UserHandle.getCallingUserId() != userId 1516 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1517 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1518 } 1519 synchronized (mPackagesLock) { 1520 // Read the restrictions from XML 1521 return readApplicationRestrictionsLocked(packageName, userId); 1522 } 1523 } 1524 1525 @Override 1526 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1527 int userId) { 1528 if (UserHandle.getCallingUserId() != userId 1529 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1530 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1531 } 1532 synchronized (mPackagesLock) { 1533 if (restrictions == null || restrictions.isEmpty()) { 1534 cleanAppRestrictionsForPackage(packageName, userId); 1535 } else { 1536 // Write the restrictions to XML 1537 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1538 } 1539 } 1540 1541 if (isPackageInstalled(packageName, userId)) { 1542 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1543 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1544 changeIntent.setPackage(packageName); 1545 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1546 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1547 } 1548 } 1549 1550 @Override 1551 public void removeRestrictions() { 1552 checkManageUsersPermission("Only system can remove restrictions"); 1553 final int userHandle = UserHandle.getCallingUserId(); 1554 removeRestrictionsForUser(userHandle, true); 1555 } 1556 1557 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1558 synchronized (mPackagesLock) { 1559 // Remove all user restrictions 1560 setUserRestrictions(new Bundle(), userHandle); 1561 // Remove any app restrictions 1562 cleanAppRestrictions(userHandle); 1563 } 1564 if (unhideApps) { 1565 unhideAllInstalledAppsForUser(userHandle); 1566 } 1567 } 1568 1569 private void unhideAllInstalledAppsForUser(final int userHandle) { 1570 mHandler.post(new Runnable() { 1571 @Override 1572 public void run() { 1573 List<ApplicationInfo> apps = 1574 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1575 userHandle).getList(); 1576 final long ident = Binder.clearCallingIdentity(); 1577 try { 1578 for (ApplicationInfo appInfo : apps) { 1579 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1580 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1581 != 0) { 1582 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1583 userHandle); 1584 } 1585 } 1586 } finally { 1587 Binder.restoreCallingIdentity(ident); 1588 } 1589 } 1590 }); 1591 } 1592 private int getUidForPackage(String packageName) { 1593 long ident = Binder.clearCallingIdentity(); 1594 try { 1595 return mContext.getPackageManager().getApplicationInfo(packageName, 1596 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1597 } catch (NameNotFoundException nnfe) { 1598 return -1; 1599 } finally { 1600 Binder.restoreCallingIdentity(ident); 1601 } 1602 } 1603 1604 private Bundle readApplicationRestrictionsLocked(String packageName, 1605 int userId) { 1606 AtomicFile restrictionsFile = 1607 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1608 packageToRestrictionsFileName(packageName))); 1609 return readApplicationRestrictionsLocked(restrictionsFile); 1610 } 1611 1612 @VisibleForTesting 1613 static Bundle readApplicationRestrictionsLocked(AtomicFile restrictionsFile) { 1614 final Bundle restrictions = new Bundle(); 1615 final ArrayList<String> values = new ArrayList<>(); 1616 if (!restrictionsFile.getBaseFile().exists()) { 1617 return restrictions; 1618 } 1619 1620 FileInputStream fis = null; 1621 try { 1622 fis = restrictionsFile.openRead(); 1623 XmlPullParser parser = Xml.newPullParser(); 1624 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1625 XmlUtils.nextElement(parser); 1626 if (parser.getEventType() != XmlPullParser.START_TAG) { 1627 Slog.e(LOG_TAG, "Unable to read restrictions file " 1628 + restrictionsFile.getBaseFile()); 1629 return restrictions; 1630 } 1631 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1632 readEntry(restrictions, values, parser); 1633 } 1634 } catch (IOException|XmlPullParserException e) { 1635 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1636 } finally { 1637 IoUtils.closeQuietly(fis); 1638 } 1639 return restrictions; 1640 } 1641 1642 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1643 XmlPullParser parser) throws XmlPullParserException, IOException { 1644 int type = parser.getEventType(); 1645 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1646 String key = parser.getAttributeValue(null, ATTR_KEY); 1647 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1648 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1649 if (multiple != null) { 1650 values.clear(); 1651 int count = Integer.parseInt(multiple); 1652 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1653 if (type == XmlPullParser.START_TAG 1654 && parser.getName().equals(TAG_VALUE)) { 1655 values.add(parser.nextText().trim()); 1656 count--; 1657 } 1658 } 1659 String [] valueStrings = new String[values.size()]; 1660 values.toArray(valueStrings); 1661 restrictions.putStringArray(key, valueStrings); 1662 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1663 restrictions.putBundle(key, readBundleEntry(parser, values)); 1664 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1665 final int outerDepth = parser.getDepth(); 1666 ArrayList<Bundle> bundleList = new ArrayList<>(); 1667 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1668 Bundle childBundle = readBundleEntry(parser, values); 1669 bundleList.add(childBundle); 1670 } 1671 restrictions.putParcelableArray(key, 1672 bundleList.toArray(new Bundle[bundleList.size()])); 1673 } else { 1674 String value = parser.nextText().trim(); 1675 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1676 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1677 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1678 restrictions.putInt(key, Integer.parseInt(value)); 1679 } else { 1680 restrictions.putString(key, value); 1681 } 1682 } 1683 } 1684 } 1685 1686 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1687 throws IOException, XmlPullParserException { 1688 Bundle childBundle = new Bundle(); 1689 final int outerDepth = parser.getDepth(); 1690 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1691 readEntry(childBundle, values, parser); 1692 } 1693 return childBundle; 1694 } 1695 1696 private void writeApplicationRestrictionsLocked(String packageName, 1697 Bundle restrictions, int userId) { 1698 AtomicFile restrictionsFile = new AtomicFile( 1699 new File(Environment.getUserSystemDirectory(userId), 1700 packageToRestrictionsFileName(packageName))); 1701 writeApplicationRestrictionsLocked(restrictions, restrictionsFile); 1702 } 1703 1704 @VisibleForTesting 1705 static void writeApplicationRestrictionsLocked(Bundle restrictions, 1706 AtomicFile restrictionsFile) { 1707 FileOutputStream fos = null; 1708 try { 1709 fos = restrictionsFile.startWrite(); 1710 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1711 1712 final XmlSerializer serializer = new FastXmlSerializer(); 1713 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1714 serializer.startDocument(null, true); 1715 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1716 1717 serializer.startTag(null, TAG_RESTRICTIONS); 1718 writeBundle(restrictions, serializer); 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", e); 1726 } 1727 } 1728 1729 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1730 throws IOException { 1731 for (String key : restrictions.keySet()) { 1732 Object value = restrictions.get(key); 1733 serializer.startTag(null, TAG_ENTRY); 1734 serializer.attribute(null, ATTR_KEY, key); 1735 1736 if (value instanceof Boolean) { 1737 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1738 serializer.text(value.toString()); 1739 } else if (value instanceof Integer) { 1740 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1741 serializer.text(value.toString()); 1742 } else if (value == null || value instanceof String) { 1743 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1744 serializer.text(value != null ? (String) value : ""); 1745 } else if (value instanceof Bundle) { 1746 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1747 writeBundle((Bundle) value, serializer); 1748 } else if (value instanceof Parcelable[]) { 1749 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 1750 Parcelable[] array = (Parcelable[]) value; 1751 for (Parcelable parcelable : array) { 1752 if (!(parcelable instanceof Bundle)) { 1753 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 1754 } 1755 serializer.startTag(null, TAG_ENTRY); 1756 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1757 writeBundle((Bundle) parcelable, serializer); 1758 serializer.endTag(null, TAG_ENTRY); 1759 } 1760 } else { 1761 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1762 String[] values = (String[]) value; 1763 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1764 for (String choice : values) { 1765 serializer.startTag(null, TAG_VALUE); 1766 serializer.text(choice != null ? choice : ""); 1767 serializer.endTag(null, TAG_VALUE); 1768 } 1769 } 1770 serializer.endTag(null, TAG_ENTRY); 1771 } 1772 } 1773 1774 @Override 1775 public int getUserSerialNumber(int userHandle) { 1776 synchronized (mPackagesLock) { 1777 if (!exists(userHandle)) return -1; 1778 return getUserInfoLocked(userHandle).serialNumber; 1779 } 1780 } 1781 1782 @Override 1783 public int getUserHandle(int userSerialNumber) { 1784 synchronized (mPackagesLock) { 1785 for (int userId : mUserIds) { 1786 UserInfo info = getUserInfoLocked(userId); 1787 if (info != null && info.serialNumber == userSerialNumber) return userId; 1788 } 1789 // Not found 1790 return -1; 1791 } 1792 } 1793 1794 @Override 1795 public long getUserCreationTime(int userHandle) { 1796 int callingUserId = UserHandle.getCallingUserId(); 1797 UserInfo userInfo = null; 1798 synchronized (mPackagesLock) { 1799 if (callingUserId == userHandle) { 1800 userInfo = getUserInfoLocked(userHandle); 1801 } else { 1802 UserInfo parent = getProfileParentLocked(userHandle); 1803 if (parent != null && parent.id == callingUserId) { 1804 userInfo = getUserInfoLocked(userHandle); 1805 } 1806 } 1807 } 1808 if (userInfo == null) { 1809 throw new SecurityException("userHandle can only be the calling user or a managed " 1810 + "profile associated with this user"); 1811 } 1812 return userInfo.creationTime; 1813 } 1814 1815 /** 1816 * Caches the list of user ids in an array, adjusting the array size when necessary. 1817 */ 1818 private void updateUserIdsLocked() { 1819 int num = 0; 1820 for (int i = 0; i < mUsers.size(); i++) { 1821 if (!mUsers.valueAt(i).partial) { 1822 num++; 1823 } 1824 } 1825 final int[] newUsers = new int[num]; 1826 int n = 0; 1827 for (int i = 0; i < mUsers.size(); i++) { 1828 if (!mUsers.valueAt(i).partial) { 1829 newUsers[n++] = mUsers.keyAt(i); 1830 } 1831 } 1832 mUserIds = newUsers; 1833 } 1834 1835 /** 1836 * Make a note of the last started time of a user and do some cleanup. 1837 * @param userId the user that was just foregrounded 1838 */ 1839 public void onUserForeground(int userId) { 1840 synchronized (mPackagesLock) { 1841 UserInfo user = mUsers.get(userId); 1842 long now = System.currentTimeMillis(); 1843 if (user == null || user.partial) { 1844 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1845 return; 1846 } 1847 if (now > EPOCH_PLUS_30_YEARS) { 1848 user.lastLoggedInTime = now; 1849 scheduleWriteUserLocked(user); 1850 } 1851 } 1852 } 1853 1854 /** 1855 * Returns the next available user id, filling in any holes in the ids. 1856 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1857 * for data and battery stats collection, or unexpected cross-talk. 1858 * @return 1859 */ 1860 private int getNextAvailableIdLocked() { 1861 synchronized (mPackagesLock) { 1862 int i = MIN_USER_ID; 1863 while (i < Integer.MAX_VALUE) { 1864 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1865 break; 1866 } 1867 i++; 1868 } 1869 return i; 1870 } 1871 } 1872 1873 private String packageToRestrictionsFileName(String packageName) { 1874 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1875 } 1876 1877 @Override 1878 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1879 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1880 != PackageManager.PERMISSION_GRANTED) { 1881 pw.println("Permission Denial: can't dump UserManager from from pid=" 1882 + Binder.getCallingPid() 1883 + ", uid=" + Binder.getCallingUid() 1884 + " without permission " 1885 + android.Manifest.permission.DUMP); 1886 return; 1887 } 1888 1889 long now = System.currentTimeMillis(); 1890 StringBuilder sb = new StringBuilder(); 1891 synchronized (mPackagesLock) { 1892 pw.println("Users:"); 1893 for (int i = 0; i < mUsers.size(); i++) { 1894 UserInfo user = mUsers.valueAt(i); 1895 if (user == null) continue; 1896 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1897 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1898 if (user.partial) pw.print(" <partial>"); 1899 pw.println(); 1900 pw.print(" Created: "); 1901 if (user.creationTime == 0) { 1902 pw.println("<unknown>"); 1903 } else { 1904 sb.setLength(0); 1905 TimeUtils.formatDuration(now - user.creationTime, sb); 1906 sb.append(" ago"); 1907 pw.println(sb); 1908 } 1909 pw.print(" Last logged in: "); 1910 if (user.lastLoggedInTime == 0) { 1911 pw.println("<unknown>"); 1912 } else { 1913 sb.setLength(0); 1914 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1915 sb.append(" ago"); 1916 pw.println(sb); 1917 } 1918 } 1919 } 1920 } 1921 1922 final class MainHandler extends Handler { 1923 1924 @Override 1925 public void handleMessage(Message msg) { 1926 switch (msg.what) { 1927 case WRITE_USER_MSG: 1928 removeMessages(WRITE_USER_MSG, msg.obj); 1929 synchronized (mPackagesLock) { 1930 int userId = ((UserInfo) msg.obj).id; 1931 UserInfo userInfo = mUsers.get(userId); 1932 if (userInfo != null) { 1933 writeUserLocked(userInfo); 1934 } 1935 } 1936 } 1937 } 1938 } 1939} 1940