UserManagerService.java revision bcf48ed2262d655ebf59153dea645ca761b73db5
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.os.storage.VolumeInfo; 47import android.system.ErrnoException; 48import android.system.Os; 49import android.system.OsConstants; 50import android.util.AtomicFile; 51import android.util.Log; 52import android.util.Slog; 53import android.util.SparseArray; 54import android.util.SparseBooleanArray; 55import android.util.TimeUtils; 56import android.util.Xml; 57 58import com.google.android.collect.Sets; 59 60import com.android.internal.annotations.VisibleForTesting; 61import com.android.internal.app.IAppOpsService; 62import com.android.internal.util.ArrayUtils; 63import com.android.internal.util.FastXmlSerializer; 64import com.android.internal.util.XmlUtils; 65 66import org.xmlpull.v1.XmlPullParser; 67import org.xmlpull.v1.XmlPullParserException; 68import org.xmlpull.v1.XmlSerializer; 69 70import java.io.BufferedOutputStream; 71import java.io.File; 72import java.io.FileDescriptor; 73import java.io.FileInputStream; 74import java.io.FileNotFoundException; 75import java.io.FileOutputStream; 76import java.io.IOException; 77import java.io.PrintWriter; 78import java.nio.charset.StandardCharsets; 79import java.util.ArrayList; 80import java.util.List; 81import java.util.Set; 82 83import libcore.io.IoUtils; 84 85public class UserManagerService extends IUserManager.Stub { 86 87 private static final String LOG_TAG = "UserManagerService"; 88 89 private static final boolean DBG = false; 90 91 private static final String TAG_NAME = "name"; 92 private static final String ATTR_FLAGS = "flags"; 93 private static final String ATTR_ICON_PATH = "icon"; 94 private static final String ATTR_ID = "id"; 95 private static final String ATTR_CREATION_TIME = "created"; 96 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 97 private static final String ATTR_SERIAL_NO = "serialNumber"; 98 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 99 private static final String ATTR_PARTIAL = "partial"; 100 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 101 private static final String ATTR_USER_VERSION = "version"; 102 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 103 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 104 private static final String TAG_USERS = "users"; 105 private static final String TAG_USER = "user"; 106 private static final String TAG_RESTRICTIONS = "restrictions"; 107 private static final String TAG_ENTRY = "entry"; 108 private static final String TAG_VALUE = "value"; 109 private static final String ATTR_KEY = "key"; 110 private static final String ATTR_VALUE_TYPE = "type"; 111 private static final String ATTR_MULTIPLE = "m"; 112 113 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 114 private static final String ATTR_TYPE_STRING = "s"; 115 private static final String ATTR_TYPE_BOOLEAN = "b"; 116 private static final String ATTR_TYPE_INTEGER = "i"; 117 private static final String ATTR_TYPE_BUNDLE = "B"; 118 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 119 120 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 121 private static final String USER_LIST_FILENAME = "userlist.xml"; 122 private static final String USER_PHOTO_FILENAME = "photo.png"; 123 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 124 125 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 126 private static final String XML_SUFFIX = ".xml"; 127 128 private static final int MIN_USER_ID = 10; 129 130 private static final int USER_VERSION = 5; 131 132 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 133 134 // Maximum number of managed profiles permitted is 1. This cannot be increased 135 // without first making sure that the rest of the framework is prepared for it. 136 private static final int MAX_MANAGED_PROFILES = 1; 137 138 // Set of user restrictions, which can only be enforced by the system 139 private static final Set<String> SYSTEM_CONTROLLED_RESTRICTIONS = Sets.newArraySet( 140 UserManager.DISALLOW_RECORD_AUDIO); 141 142 static final int WRITE_USER_MSG = 1; 143 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 144 145 private static final String XATTR_SERIAL = "user.serial"; 146 147 private final Context mContext; 148 private final PackageManagerService mPm; 149 private final Object mInstallLock; 150 private final Object mPackagesLock; 151 152 private final Handler mHandler; 153 154 private final File mUsersDir; 155 private final File mUserListFile; 156 157 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 158 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 159 private final Bundle mGuestRestrictions = new Bundle(); 160 161 /** 162 * Set of user IDs being actively removed. Removed IDs linger in this set 163 * for several seconds to work around a VFS caching issue. 164 */ 165 // @GuardedBy("mPackagesLock") 166 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 167 168 private int[] mUserIds; 169 private int mNextSerialNumber; 170 private int mUserVersion = 0; 171 172 private IAppOpsService mAppOpsService; 173 174 private static UserManagerService sInstance; 175 176 public static UserManagerService getInstance() { 177 synchronized (UserManagerService.class) { 178 return sInstance; 179 } 180 } 181 182 /** 183 * Available for testing purposes. 184 */ 185 UserManagerService(File dataDir, File baseUserPath) { 186 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 187 } 188 189 /** 190 * Called by package manager to create the service. This is closely 191 * associated with the package manager, and the given lock is the 192 * package manager's own lock. 193 */ 194 UserManagerService(Context context, PackageManagerService pm, 195 Object installLock, Object packagesLock) { 196 this(context, pm, installLock, packagesLock, 197 Environment.getDataDirectory(), 198 new File(Environment.getDataDirectory(), "user")); 199 } 200 201 /** 202 * Available for testing purposes. 203 */ 204 private UserManagerService(Context context, PackageManagerService pm, 205 Object installLock, Object packagesLock, 206 File dataDir, File baseUserPath) { 207 mContext = context; 208 mPm = pm; 209 mInstallLock = installLock; 210 mPackagesLock = packagesLock; 211 mHandler = new MainHandler(); 212 synchronized (mInstallLock) { 213 synchronized (mPackagesLock) { 214 mUsersDir = new File(dataDir, USER_INFO_DIR); 215 mUsersDir.mkdirs(); 216 // Make zeroth user directory, for services to migrate their files to that location 217 File userZeroDir = new File(mUsersDir, "0"); 218 userZeroDir.mkdirs(); 219 FileUtils.setPermissions(mUsersDir.toString(), 220 FileUtils.S_IRWXU|FileUtils.S_IRWXG 221 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 222 -1, -1); 223 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 224 initDefaultGuestRestrictions(); 225 readUserListLocked(); 226 sInstance = this; 227 } 228 } 229 } 230 231 void systemReady() { 232 synchronized (mInstallLock) { 233 synchronized (mPackagesLock) { 234 // Prune out any partially created/partially removed users. 235 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 236 for (int i = 0; i < mUsers.size(); i++) { 237 UserInfo ui = mUsers.valueAt(i); 238 if ((ui.partial || ui.guestToRemove) && i != 0) { 239 partials.add(ui); 240 } 241 } 242 for (int i = 0; i < partials.size(); i++) { 243 UserInfo ui = partials.get(i); 244 Slog.w(LOG_TAG, "Removing partially created user #" + i 245 + " (name=" + ui.name + ")"); 246 removeUserStateLocked(ui.id); 247 } 248 } 249 } 250 onUserForeground(UserHandle.USER_OWNER); 251 mAppOpsService = IAppOpsService.Stub.asInterface( 252 ServiceManager.getService(Context.APP_OPS_SERVICE)); 253 for (int i = 0; i < mUserIds.length; ++i) { 254 try { 255 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 256 } catch (RemoteException e) { 257 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 258 } 259 } 260 } 261 262 @Override 263 public List<UserInfo> getUsers(boolean excludeDying) { 264 checkManageUsersPermission("query users"); 265 synchronized (mPackagesLock) { 266 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 267 for (int i = 0; i < mUsers.size(); i++) { 268 UserInfo ui = mUsers.valueAt(i); 269 if (ui.partial) { 270 continue; 271 } 272 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 273 users.add(ui); 274 } 275 } 276 return users; 277 } 278 } 279 280 @Override 281 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 282 if (userId != UserHandle.getCallingUserId()) { 283 checkManageUsersPermission("getting profiles related to user " + userId); 284 } 285 final long ident = Binder.clearCallingIdentity(); 286 try { 287 synchronized (mPackagesLock) { 288 return getProfilesLocked(userId, enabledOnly); 289 } 290 } finally { 291 Binder.restoreCallingIdentity(ident); 292 } 293 } 294 295 /** Assume permissions already checked and caller's identity cleared */ 296 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 297 UserInfo user = getUserInfoLocked(userId); 298 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 299 if (user == null) { 300 // Probably a dying user 301 return users; 302 } 303 for (int i = 0; i < mUsers.size(); i++) { 304 UserInfo profile = mUsers.valueAt(i); 305 if (!isProfileOf(user, profile)) { 306 continue; 307 } 308 if (enabledOnly && !profile.isEnabled()) { 309 continue; 310 } 311 if (mRemovingUserIds.get(profile.id)) { 312 continue; 313 } 314 users.add(profile); 315 } 316 return users; 317 } 318 319 @Override 320 public UserInfo getProfileParent(int userHandle) { 321 checkManageUsersPermission("get the profile parent"); 322 synchronized (mPackagesLock) { 323 return getProfileParentLocked(userHandle); 324 } 325 } 326 327 private UserInfo getProfileParentLocked(int userHandle) { 328 UserInfo profile = getUserInfoLocked(userHandle); 329 if (profile == null) { 330 return null; 331 } 332 int parentUserId = profile.profileGroupId; 333 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 334 return null; 335 } else { 336 return getUserInfoLocked(parentUserId); 337 } 338 } 339 340 private boolean isProfileOf(UserInfo user, UserInfo profile) { 341 return user.id == profile.id || 342 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 343 && user.profileGroupId == profile.profileGroupId); 344 } 345 346 @Override 347 public void setUserEnabled(int userId) { 348 checkManageUsersPermission("enable user"); 349 synchronized (mPackagesLock) { 350 UserInfo info = getUserInfoLocked(userId); 351 if (info != null && !info.isEnabled()) { 352 info.flags ^= UserInfo.FLAG_DISABLED; 353 writeUserLocked(info); 354 } 355 } 356 } 357 358 @Override 359 public UserInfo getUserInfo(int userId) { 360 checkManageUsersPermission("query user"); 361 synchronized (mPackagesLock) { 362 return getUserInfoLocked(userId); 363 } 364 } 365 366 @Override 367 public boolean isRestricted() { 368 synchronized (mPackagesLock) { 369 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 370 } 371 } 372 373 /* 374 * Should be locked on mUsers before calling this. 375 */ 376 private UserInfo getUserInfoLocked(int userId) { 377 UserInfo ui = mUsers.get(userId); 378 // If it is partial and not in the process of being removed, return as unknown user. 379 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 380 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 381 return null; 382 } 383 return ui; 384 } 385 386 public boolean exists(int userId) { 387 synchronized (mPackagesLock) { 388 return ArrayUtils.contains(mUserIds, userId); 389 } 390 } 391 392 @Override 393 public void setUserName(int userId, String name) { 394 checkManageUsersPermission("rename users"); 395 boolean changed = false; 396 synchronized (mPackagesLock) { 397 UserInfo info = mUsers.get(userId); 398 if (info == null || info.partial) { 399 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 400 return; 401 } 402 if (name != null && !name.equals(info.name)) { 403 info.name = name; 404 writeUserLocked(info); 405 changed = true; 406 } 407 } 408 if (changed) { 409 sendUserInfoChangedBroadcast(userId); 410 } 411 } 412 413 @Override 414 public void setUserIcon(int userId, Bitmap bitmap) { 415 checkManageUsersPermission("update users"); 416 long ident = Binder.clearCallingIdentity(); 417 try { 418 synchronized (mPackagesLock) { 419 UserInfo info = mUsers.get(userId); 420 if (info == null || info.partial) { 421 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 422 return; 423 } 424 writeBitmapLocked(info, bitmap); 425 writeUserLocked(info); 426 } 427 sendUserInfoChangedBroadcast(userId); 428 } finally { 429 Binder.restoreCallingIdentity(ident); 430 } 431 } 432 433 private void sendUserInfoChangedBroadcast(int userId) { 434 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 435 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 436 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 437 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 438 } 439 440 @Override 441 public ParcelFileDescriptor getUserIcon(int userId) { 442 String iconPath; 443 synchronized (mPackagesLock) { 444 UserInfo info = mUsers.get(userId); 445 if (info == null || info.partial) { 446 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 447 return null; 448 } 449 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 450 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 451 || callingGroupId != info.profileGroupId) { 452 checkManageUsersPermission("get the icon of a user who is not related"); 453 } 454 if (info.iconPath == null) { 455 return null; 456 } 457 iconPath = info.iconPath; 458 } 459 460 try { 461 return ParcelFileDescriptor.open( 462 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 463 } catch (FileNotFoundException e) { 464 Log.e(LOG_TAG, "Couldn't find icon file", e); 465 } 466 return null; 467 } 468 469 public void makeInitialized(int userId) { 470 checkManageUsersPermission("makeInitialized"); 471 synchronized (mPackagesLock) { 472 UserInfo info = mUsers.get(userId); 473 if (info == null || info.partial) { 474 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 475 } 476 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 477 info.flags |= UserInfo.FLAG_INITIALIZED; 478 scheduleWriteUserLocked(info); 479 } 480 } 481 } 482 483 /** 484 * If default guest restrictions haven't been initialized yet, add the basic 485 * restrictions. 486 */ 487 private void initDefaultGuestRestrictions() { 488 if (mGuestRestrictions.isEmpty()) { 489 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 490 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 491 } 492 } 493 494 @Override 495 public Bundle getDefaultGuestRestrictions() { 496 checkManageUsersPermission("getDefaultGuestRestrictions"); 497 synchronized (mPackagesLock) { 498 return new Bundle(mGuestRestrictions); 499 } 500 } 501 502 @Override 503 public void setDefaultGuestRestrictions(Bundle restrictions) { 504 checkManageUsersPermission("setDefaultGuestRestrictions"); 505 synchronized (mPackagesLock) { 506 mGuestRestrictions.clear(); 507 mGuestRestrictions.putAll(restrictions); 508 writeUserListLocked(); 509 } 510 } 511 512 @Override 513 public boolean hasUserRestriction(String restrictionKey, int userId) { 514 synchronized (mPackagesLock) { 515 Bundle restrictions = mUserRestrictions.get(userId); 516 return restrictions != null && restrictions.getBoolean(restrictionKey); 517 } 518 } 519 520 @Override 521 public Bundle getUserRestrictions(int userId) { 522 // checkManageUsersPermission("getUserRestrictions"); 523 524 synchronized (mPackagesLock) { 525 Bundle restrictions = mUserRestrictions.get(userId); 526 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 527 } 528 } 529 530 @Override 531 public void setUserRestriction(String key, boolean value, int userId) { 532 synchronized (mPackagesLock) { 533 if (!SYSTEM_CONTROLLED_RESTRICTIONS.contains(key)) { 534 Bundle restrictions = getUserRestrictions(userId); 535 restrictions.putBoolean(key, value); 536 setUserRestrictionsInternalLocked(restrictions, userId); 537 } 538 } 539 } 540 541 @Override 542 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 543 checkSystemOrRoot("setSystemControlledUserRestriction"); 544 synchronized (mPackagesLock) { 545 Bundle restrictions = getUserRestrictions(userId); 546 restrictions.putBoolean(key, value); 547 setUserRestrictionsInternalLocked(restrictions, userId); 548 } 549 } 550 551 @Override 552 public void setUserRestrictions(Bundle restrictions, int userId) { 553 checkManageUsersPermission("setUserRestrictions"); 554 if (restrictions == null) return; 555 556 synchronized (mPackagesLock) { 557 final Bundle oldUserRestrictions = mUserRestrictions.get(userId); 558 // Restore the original state of system controlled restrictions from oldUserRestrictions 559 for (String key : SYSTEM_CONTROLLED_RESTRICTIONS) { 560 restrictions.remove(key); 561 if (oldUserRestrictions.containsKey(key)) { 562 restrictions.putBoolean(key, oldUserRestrictions.getBoolean(key)); 563 } 564 } 565 setUserRestrictionsInternalLocked(restrictions, userId); 566 } 567 } 568 569 private void setUserRestrictionsInternalLocked(Bundle restrictions, int userId) { 570 final Bundle userRestrictions = mUserRestrictions.get(userId); 571 userRestrictions.clear(); 572 userRestrictions.putAll(restrictions); 573 long token = Binder.clearCallingIdentity(); 574 try { 575 mAppOpsService.setUserRestrictions(userRestrictions, userId); 576 } catch (RemoteException e) { 577 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 578 } finally { 579 Binder.restoreCallingIdentity(token); 580 } 581 scheduleWriteUserLocked(mUsers.get(userId)); 582 } 583 584 /** 585 * Check if we've hit the limit of how many users can be created. 586 */ 587 private boolean isUserLimitReachedLocked() { 588 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 589 } 590 591 @Override 592 public boolean canAddMoreManagedProfiles() { 593 checkManageUsersPermission("check if more managed profiles can be added."); 594 if (ActivityManager.isLowRamDeviceStatic()) { 595 return false; 596 } 597 if (!mContext.getPackageManager().hasSystemFeature( 598 PackageManager.FEATURE_MANAGED_USERS)) { 599 return false; 600 } 601 synchronized(mPackagesLock) { 602 // Limit number of managed profiles that can be created 603 if (numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 604 >= MAX_MANAGED_PROFILES) { 605 return false; 606 } 607 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 608 // We allow creating a managed profile in the special case where there is only one user. 609 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 610 } 611 } 612 613 private int getAliveUsersExcludingGuestsCountLocked() { 614 int aliveUserCount = 0; 615 final int totalUserCount = mUsers.size(); 616 // Skip over users being removed 617 for (int i = 0; i < totalUserCount; i++) { 618 UserInfo user = mUsers.valueAt(i); 619 if (!mRemovingUserIds.get(user.id) 620 && !user.isGuest() && !user.partial) { 621 aliveUserCount++; 622 } 623 } 624 return aliveUserCount; 625 } 626 627 /** 628 * Enforces that only the system UID or root's UID or apps that have the 629 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 630 * permission can make certain calls to the UserManager. 631 * 632 * @param message used as message if SecurityException is thrown 633 * @throws SecurityException if the caller is not system or root 634 */ 635 private static final void checkManageUsersPermission(String message) { 636 final int uid = Binder.getCallingUid(); 637 if (uid != Process.SYSTEM_UID && uid != 0 638 && ActivityManager.checkComponentPermission( 639 android.Manifest.permission.MANAGE_USERS, 640 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 641 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 642 } 643 } 644 645 private static void checkSystemOrRoot(String message) { 646 final int uid = Binder.getCallingUid(); 647 if (uid != Process.SYSTEM_UID && uid != 0) { 648 throw new SecurityException("Only system may call: " + message); 649 } 650 } 651 652 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 653 try { 654 File dir = new File(mUsersDir, Integer.toString(info.id)); 655 File file = new File(dir, USER_PHOTO_FILENAME); 656 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 657 if (!dir.exists()) { 658 dir.mkdir(); 659 FileUtils.setPermissions( 660 dir.getPath(), 661 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 662 -1, -1); 663 } 664 FileOutputStream os; 665 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 666 && tmp.renameTo(file)) { 667 info.iconPath = file.getAbsolutePath(); 668 } 669 try { 670 os.close(); 671 } catch (IOException ioe) { 672 // What the ... ! 673 } 674 tmp.delete(); 675 } catch (FileNotFoundException e) { 676 Slog.w(LOG_TAG, "Error setting photo for user ", e); 677 } 678 } 679 680 /** 681 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 682 * cache it elsewhere. 683 * @return the array of user ids. 684 */ 685 public int[] getUserIds() { 686 synchronized (mPackagesLock) { 687 return mUserIds; 688 } 689 } 690 691 int[] getUserIdsLPr() { 692 return mUserIds; 693 } 694 695 private void readUserListLocked() { 696 if (!mUserListFile.exists()) { 697 fallbackToSingleUserLocked(); 698 return; 699 } 700 FileInputStream fis = null; 701 AtomicFile userListFile = new AtomicFile(mUserListFile); 702 try { 703 fis = userListFile.openRead(); 704 XmlPullParser parser = Xml.newPullParser(); 705 parser.setInput(fis, StandardCharsets.UTF_8.name()); 706 int type; 707 while ((type = parser.next()) != XmlPullParser.START_TAG 708 && type != XmlPullParser.END_DOCUMENT) { 709 ; 710 } 711 712 if (type != XmlPullParser.START_TAG) { 713 Slog.e(LOG_TAG, "Unable to read user list"); 714 fallbackToSingleUserLocked(); 715 return; 716 } 717 718 mNextSerialNumber = -1; 719 if (parser.getName().equals(TAG_USERS)) { 720 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 721 if (lastSerialNumber != null) { 722 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 723 } 724 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 725 if (versionNumber != null) { 726 mUserVersion = Integer.parseInt(versionNumber); 727 } 728 } 729 730 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 731 if (type == XmlPullParser.START_TAG) { 732 final String name = parser.getName(); 733 if (name.equals(TAG_USER)) { 734 String id = parser.getAttributeValue(null, ATTR_ID); 735 UserInfo user = readUserLocked(Integer.parseInt(id)); 736 737 if (user != null) { 738 mUsers.put(user.id, user); 739 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 740 mNextSerialNumber = user.id + 1; 741 } 742 } 743 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 744 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 745 && type != XmlPullParser.END_TAG) { 746 if (type == XmlPullParser.START_TAG) { 747 if (parser.getName().equals(TAG_RESTRICTIONS)) { 748 readRestrictionsLocked(parser, mGuestRestrictions); 749 } 750 break; 751 } 752 } 753 } 754 } 755 } 756 updateUserIdsLocked(); 757 upgradeIfNecessaryLocked(); 758 } catch (IOException ioe) { 759 fallbackToSingleUserLocked(); 760 } catch (XmlPullParserException pe) { 761 fallbackToSingleUserLocked(); 762 } finally { 763 if (fis != null) { 764 try { 765 fis.close(); 766 } catch (IOException e) { 767 } 768 } 769 } 770 } 771 772 /** 773 * Upgrade steps between versions, either for fixing bugs or changing the data format. 774 */ 775 private void upgradeIfNecessaryLocked() { 776 int userVersion = mUserVersion; 777 if (userVersion < 1) { 778 // Assign a proper name for the owner, if not initialized correctly before 779 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 780 if ("Primary".equals(user.name)) { 781 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 782 scheduleWriteUserLocked(user); 783 } 784 userVersion = 1; 785 } 786 787 if (userVersion < 2) { 788 // Owner should be marked as initialized 789 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 790 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 791 user.flags |= UserInfo.FLAG_INITIALIZED; 792 scheduleWriteUserLocked(user); 793 } 794 userVersion = 2; 795 } 796 797 798 if (userVersion < 4) { 799 userVersion = 4; 800 } 801 802 if (userVersion < 5) { 803 initDefaultGuestRestrictions(); 804 userVersion = 5; 805 } 806 807 if (userVersion < USER_VERSION) { 808 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 809 + USER_VERSION); 810 } else { 811 mUserVersion = userVersion; 812 writeUserListLocked(); 813 } 814 } 815 816 private void fallbackToSingleUserLocked() { 817 // Create the primary user 818 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 819 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 820 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 821 mUsers.put(0, primary); 822 mNextSerialNumber = MIN_USER_ID; 823 mUserVersion = USER_VERSION; 824 825 Bundle restrictions = new Bundle(); 826 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 827 828 updateUserIdsLocked(); 829 initDefaultGuestRestrictions(); 830 831 writeUserListLocked(); 832 writeUserLocked(primary); 833 } 834 835 private void scheduleWriteUserLocked(UserInfo userInfo) { 836 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 837 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 838 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 839 } 840 } 841 842 /* 843 * Writes the user file in this format: 844 * 845 * <user flags="20039023" id="0"> 846 * <name>Primary</name> 847 * </user> 848 */ 849 private void writeUserLocked(UserInfo userInfo) { 850 FileOutputStream fos = null; 851 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 852 try { 853 fos = userFile.startWrite(); 854 final BufferedOutputStream bos = new BufferedOutputStream(fos); 855 856 // XmlSerializer serializer = XmlUtils.serializerInstance(); 857 final XmlSerializer serializer = new FastXmlSerializer(); 858 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 859 serializer.startDocument(null, true); 860 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 861 862 serializer.startTag(null, TAG_USER); 863 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 864 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 865 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 866 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 867 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 868 Long.toString(userInfo.lastLoggedInTime)); 869 if (userInfo.iconPath != null) { 870 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 871 } 872 if (userInfo.partial) { 873 serializer.attribute(null, ATTR_PARTIAL, "true"); 874 } 875 if (userInfo.guestToRemove) { 876 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 877 } 878 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 879 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 880 Integer.toString(userInfo.profileGroupId)); 881 } 882 883 serializer.startTag(null, TAG_NAME); 884 serializer.text(userInfo.name); 885 serializer.endTag(null, TAG_NAME); 886 Bundle restrictions = mUserRestrictions.get(userInfo.id); 887 if (restrictions != null) { 888 writeRestrictionsLocked(serializer, restrictions); 889 } 890 serializer.endTag(null, TAG_USER); 891 892 serializer.endDocument(); 893 userFile.finishWrite(fos); 894 } catch (Exception ioe) { 895 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 896 userFile.failWrite(fos); 897 } 898 } 899 900 /* 901 * Writes the user list file in this format: 902 * 903 * <users nextSerialNumber="3"> 904 * <user id="0"></user> 905 * <user id="2"></user> 906 * </users> 907 */ 908 private void writeUserListLocked() { 909 FileOutputStream fos = null; 910 AtomicFile userListFile = new AtomicFile(mUserListFile); 911 try { 912 fos = userListFile.startWrite(); 913 final BufferedOutputStream bos = new BufferedOutputStream(fos); 914 915 // XmlSerializer serializer = XmlUtils.serializerInstance(); 916 final XmlSerializer serializer = new FastXmlSerializer(); 917 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 918 serializer.startDocument(null, true); 919 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 920 921 serializer.startTag(null, TAG_USERS); 922 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 923 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 924 925 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 926 writeRestrictionsLocked(serializer, mGuestRestrictions); 927 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 928 for (int i = 0; i < mUsers.size(); i++) { 929 UserInfo user = mUsers.valueAt(i); 930 serializer.startTag(null, TAG_USER); 931 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 932 serializer.endTag(null, TAG_USER); 933 } 934 935 serializer.endTag(null, TAG_USERS); 936 937 serializer.endDocument(); 938 userListFile.finishWrite(fos); 939 } catch (Exception e) { 940 userListFile.failWrite(fos); 941 Slog.e(LOG_TAG, "Error writing user list"); 942 } 943 } 944 945 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 946 throws IOException { 947 serializer.startTag(null, TAG_RESTRICTIONS); 948 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 949 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 950 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 951 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 952 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 953 writeBoolean(serializer, restrictions, 954 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 955 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 956 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 957 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 958 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 959 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 960 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 961 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 962 writeBoolean(serializer, restrictions, UserManager.DISALLOW_NETWORK_RESET); 963 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 964 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 965 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 966 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 967 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 968 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 969 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 970 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 971 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 972 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 973 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 974 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FUN); 975 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 976 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 977 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 978 writeBoolean(serializer, restrictions, UserManager.DISALLOW_WALLPAPER); 979 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SAFE_BOOT); 980 writeBoolean(serializer, restrictions, UserManager.ALLOW_PARENT_PROFILE_APP_LINKING); 981 serializer.endTag(null, TAG_RESTRICTIONS); 982 } 983 984 private UserInfo readUserLocked(int id) { 985 int flags = 0; 986 int serialNumber = id; 987 String name = null; 988 String iconPath = null; 989 long creationTime = 0L; 990 long lastLoggedInTime = 0L; 991 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 992 boolean partial = false; 993 boolean guestToRemove = false; 994 Bundle restrictions = new Bundle(); 995 996 FileInputStream fis = null; 997 try { 998 AtomicFile userFile = 999 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1000 fis = userFile.openRead(); 1001 XmlPullParser parser = Xml.newPullParser(); 1002 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1003 int type; 1004 while ((type = parser.next()) != XmlPullParser.START_TAG 1005 && type != XmlPullParser.END_DOCUMENT) { 1006 ; 1007 } 1008 1009 if (type != XmlPullParser.START_TAG) { 1010 Slog.e(LOG_TAG, "Unable to read user " + id); 1011 return null; 1012 } 1013 1014 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1015 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1016 if (storedId != id) { 1017 Slog.e(LOG_TAG, "User id does not match the file name"); 1018 return null; 1019 } 1020 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1021 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1022 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1023 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1024 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1025 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1026 UserInfo.NO_PROFILE_GROUP_ID); 1027 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1028 if ("true".equals(valueString)) { 1029 partial = true; 1030 } 1031 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1032 if ("true".equals(valueString)) { 1033 guestToRemove = true; 1034 } 1035 1036 int outerDepth = parser.getDepth(); 1037 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1038 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1039 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1040 continue; 1041 } 1042 String tag = parser.getName(); 1043 if (TAG_NAME.equals(tag)) { 1044 type = parser.next(); 1045 if (type == XmlPullParser.TEXT) { 1046 name = parser.getText(); 1047 } 1048 } else if (TAG_RESTRICTIONS.equals(tag)) { 1049 readRestrictionsLocked(parser, restrictions); 1050 } 1051 } 1052 } 1053 1054 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1055 userInfo.serialNumber = serialNumber; 1056 userInfo.creationTime = creationTime; 1057 userInfo.lastLoggedInTime = lastLoggedInTime; 1058 userInfo.partial = partial; 1059 userInfo.guestToRemove = guestToRemove; 1060 userInfo.profileGroupId = profileGroupId; 1061 mUserRestrictions.append(id, restrictions); 1062 return userInfo; 1063 1064 } catch (IOException ioe) { 1065 } catch (XmlPullParserException pe) { 1066 } finally { 1067 if (fis != null) { 1068 try { 1069 fis.close(); 1070 } catch (IOException e) { 1071 } 1072 } 1073 } 1074 return null; 1075 } 1076 1077 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1078 throws IOException { 1079 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1080 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1081 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1082 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1083 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1084 readBoolean(parser, restrictions, 1085 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1086 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1087 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1088 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1089 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1090 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1091 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1092 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1093 readBoolean(parser, restrictions, UserManager.DISALLOW_NETWORK_RESET); 1094 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1095 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1096 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1097 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1098 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1099 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1100 readBoolean(parser, restrictions, 1101 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1102 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1103 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1104 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1105 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1106 readBoolean(parser, restrictions, UserManager.DISALLOW_FUN); 1107 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1108 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1109 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1110 readBoolean(parser, restrictions, UserManager.DISALLOW_WALLPAPER); 1111 readBoolean(parser, restrictions, UserManager.DISALLOW_SAFE_BOOT); 1112 readBoolean(parser, restrictions, UserManager.ALLOW_PARENT_PROFILE_APP_LINKING); 1113 } 1114 1115 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1116 String restrictionKey) { 1117 String value = parser.getAttributeValue(null, restrictionKey); 1118 if (value != null) { 1119 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1120 } 1121 } 1122 1123 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1124 throws IOException { 1125 if (restrictions.containsKey(restrictionKey)) { 1126 xml.attribute(null, restrictionKey, 1127 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1128 } 1129 } 1130 1131 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1132 String valueString = parser.getAttributeValue(null, attr); 1133 if (valueString == null) return defaultValue; 1134 try { 1135 return Integer.parseInt(valueString); 1136 } catch (NumberFormatException nfe) { 1137 return defaultValue; 1138 } 1139 } 1140 1141 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1142 String valueString = parser.getAttributeValue(null, attr); 1143 if (valueString == null) return defaultValue; 1144 try { 1145 return Long.parseLong(valueString); 1146 } catch (NumberFormatException nfe) { 1147 return defaultValue; 1148 } 1149 } 1150 1151 private boolean isPackageInstalled(String pkg, int userId) { 1152 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1153 PackageManager.GET_UNINSTALLED_PACKAGES, 1154 userId); 1155 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1156 return false; 1157 } 1158 return true; 1159 } 1160 1161 /** 1162 * Removes all the restrictions files (res_<packagename>) for a given user. 1163 * Does not do any permissions checking. 1164 */ 1165 private void cleanAppRestrictions(int userId) { 1166 synchronized (mPackagesLock) { 1167 File dir = Environment.getUserSystemDirectory(userId); 1168 String[] files = dir.list(); 1169 if (files == null) return; 1170 for (String fileName : files) { 1171 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1172 File resFile = new File(dir, fileName); 1173 if (resFile.exists()) { 1174 resFile.delete(); 1175 } 1176 } 1177 } 1178 } 1179 } 1180 1181 /** 1182 * Removes the app restrictions file for a specific package and user id, if it exists. 1183 */ 1184 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1185 synchronized (mPackagesLock) { 1186 File dir = Environment.getUserSystemDirectory(userId); 1187 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1188 if (resFile.exists()) { 1189 resFile.delete(); 1190 } 1191 } 1192 } 1193 1194 @Override 1195 public UserInfo createProfileForUser(String name, int flags, int userId) { 1196 checkManageUsersPermission("Only the system can create users"); 1197 if (userId != UserHandle.USER_OWNER) { 1198 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1199 return null; 1200 } 1201 return createUserInternal(name, flags, userId); 1202 } 1203 1204 @Override 1205 public UserInfo createUser(String name, int flags) { 1206 checkManageUsersPermission("Only the system can create users"); 1207 return createUserInternal(name, flags, UserHandle.USER_NULL); 1208 } 1209 1210 private UserInfo createUserInternal(String name, int flags, int parentId) { 1211 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1212 UserManager.DISALLOW_ADD_USER, false)) { 1213 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1214 return null; 1215 } 1216 if (ActivityManager.isLowRamDeviceStatic()) { 1217 return null; 1218 } 1219 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1220 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1221 final long ident = Binder.clearCallingIdentity(); 1222 UserInfo userInfo = null; 1223 try { 1224 synchronized (mInstallLock) { 1225 synchronized (mPackagesLock) { 1226 UserInfo parent = null; 1227 if (parentId != UserHandle.USER_NULL) { 1228 parent = getUserInfoLocked(parentId); 1229 if (parent == null) return null; 1230 } 1231 if (isManagedProfile && !canAddMoreManagedProfiles()) { 1232 return null; 1233 } 1234 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1235 // If we're not adding a guest user or a managed profile and the limit has 1236 // been reached, cannot add a user. 1237 return null; 1238 } 1239 // If we're adding a guest and there already exists one, bail. 1240 if (isGuest && findCurrentGuestUserLocked() != null) { 1241 return null; 1242 } 1243 int userId = getNextAvailableIdLocked(); 1244 userInfo = new UserInfo(userId, name, null, flags); 1245 userInfo.serialNumber = mNextSerialNumber++; 1246 long now = System.currentTimeMillis(); 1247 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1248 userInfo.partial = true; 1249 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1250 mUsers.put(userId, userInfo); 1251 writeUserListLocked(); 1252 if (parent != null) { 1253 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1254 parent.profileGroupId = parent.id; 1255 scheduleWriteUserLocked(parent); 1256 } 1257 userInfo.profileGroupId = parent.profileGroupId; 1258 } 1259 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1260 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1261 final String volumeUuid = vol.getFsUuid(); 1262 try { 1263 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1264 userId); 1265 prepareUserDirectory(mContext, volumeUuid, userId); 1266 enforceSerialNumber(userDir, userInfo.serialNumber); 1267 } catch (IOException e) { 1268 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1269 } 1270 } 1271 mPm.createNewUserLILPw(userId); 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 // Cleanup package manager settings 1474 mPm.cleanUpUserLILPw(this, userHandle); 1475 1476 // Remove this user from the list 1477 mUsers.remove(userHandle); 1478 // Remove user file 1479 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1480 userFile.delete(); 1481 // Update the user list 1482 writeUserListLocked(); 1483 updateUserIdsLocked(); 1484 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1485 } 1486 1487 private void removeDirectoryRecursive(File parent) { 1488 if (parent.isDirectory()) { 1489 String[] files = parent.list(); 1490 for (String filename : files) { 1491 File child = new File(parent, filename); 1492 removeDirectoryRecursive(child); 1493 } 1494 } 1495 parent.delete(); 1496 } 1497 1498 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1499 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1500 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1501 Intent.FLAG_RECEIVER_FOREGROUND); 1502 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1503 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1504 } 1505 1506 @Override 1507 public Bundle getApplicationRestrictions(String packageName) { 1508 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1509 } 1510 1511 @Override 1512 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1513 if (UserHandle.getCallingUserId() != userId 1514 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1515 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1516 } 1517 synchronized (mPackagesLock) { 1518 // Read the restrictions from XML 1519 return readApplicationRestrictionsLocked(packageName, userId); 1520 } 1521 } 1522 1523 @Override 1524 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1525 int userId) { 1526 if (UserHandle.getCallingUserId() != userId 1527 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1528 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1529 } 1530 synchronized (mPackagesLock) { 1531 if (restrictions == null || restrictions.isEmpty()) { 1532 cleanAppRestrictionsForPackage(packageName, userId); 1533 } else { 1534 // Write the restrictions to XML 1535 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1536 } 1537 } 1538 1539 if (isPackageInstalled(packageName, userId)) { 1540 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1541 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1542 changeIntent.setPackage(packageName); 1543 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1544 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1545 } 1546 } 1547 1548 @Override 1549 public void removeRestrictions() { 1550 checkManageUsersPermission("Only system can remove restrictions"); 1551 final int userHandle = UserHandle.getCallingUserId(); 1552 removeRestrictionsForUser(userHandle, true); 1553 } 1554 1555 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1556 synchronized (mPackagesLock) { 1557 // Remove all user restrictions 1558 setUserRestrictions(new Bundle(), userHandle); 1559 // Remove any app restrictions 1560 cleanAppRestrictions(userHandle); 1561 } 1562 if (unhideApps) { 1563 unhideAllInstalledAppsForUser(userHandle); 1564 } 1565 } 1566 1567 private void unhideAllInstalledAppsForUser(final int userHandle) { 1568 mHandler.post(new Runnable() { 1569 @Override 1570 public void run() { 1571 List<ApplicationInfo> apps = 1572 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1573 userHandle).getList(); 1574 final long ident = Binder.clearCallingIdentity(); 1575 try { 1576 for (ApplicationInfo appInfo : apps) { 1577 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1578 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1579 != 0) { 1580 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1581 userHandle); 1582 } 1583 } 1584 } finally { 1585 Binder.restoreCallingIdentity(ident); 1586 } 1587 } 1588 }); 1589 } 1590 private int getUidForPackage(String packageName) { 1591 long ident = Binder.clearCallingIdentity(); 1592 try { 1593 return mContext.getPackageManager().getApplicationInfo(packageName, 1594 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1595 } catch (NameNotFoundException nnfe) { 1596 return -1; 1597 } finally { 1598 Binder.restoreCallingIdentity(ident); 1599 } 1600 } 1601 1602 private Bundle readApplicationRestrictionsLocked(String packageName, 1603 int userId) { 1604 AtomicFile restrictionsFile = 1605 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1606 packageToRestrictionsFileName(packageName))); 1607 return readApplicationRestrictionsLocked(restrictionsFile); 1608 } 1609 1610 @VisibleForTesting 1611 static Bundle readApplicationRestrictionsLocked(AtomicFile restrictionsFile) { 1612 final Bundle restrictions = new Bundle(); 1613 final ArrayList<String> values = new ArrayList<>(); 1614 if (!restrictionsFile.getBaseFile().exists()) { 1615 return restrictions; 1616 } 1617 1618 FileInputStream fis = null; 1619 try { 1620 fis = restrictionsFile.openRead(); 1621 XmlPullParser parser = Xml.newPullParser(); 1622 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1623 XmlUtils.nextElement(parser); 1624 if (parser.getEventType() != XmlPullParser.START_TAG) { 1625 Slog.e(LOG_TAG, "Unable to read restrictions file " 1626 + restrictionsFile.getBaseFile()); 1627 return restrictions; 1628 } 1629 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1630 readEntry(restrictions, values, parser); 1631 } 1632 } catch (IOException|XmlPullParserException e) { 1633 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1634 } finally { 1635 IoUtils.closeQuietly(fis); 1636 } 1637 return restrictions; 1638 } 1639 1640 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1641 XmlPullParser parser) throws XmlPullParserException, IOException { 1642 int type = parser.getEventType(); 1643 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1644 String key = parser.getAttributeValue(null, ATTR_KEY); 1645 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1646 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1647 if (multiple != null) { 1648 values.clear(); 1649 int count = Integer.parseInt(multiple); 1650 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1651 if (type == XmlPullParser.START_TAG 1652 && parser.getName().equals(TAG_VALUE)) { 1653 values.add(parser.nextText().trim()); 1654 count--; 1655 } 1656 } 1657 String [] valueStrings = new String[values.size()]; 1658 values.toArray(valueStrings); 1659 restrictions.putStringArray(key, valueStrings); 1660 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1661 restrictions.putBundle(key, readBundleEntry(parser, values)); 1662 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1663 final int outerDepth = parser.getDepth(); 1664 ArrayList<Bundle> bundleList = new ArrayList<>(); 1665 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1666 Bundle childBundle = readBundleEntry(parser, values); 1667 bundleList.add(childBundle); 1668 } 1669 restrictions.putParcelableArray(key, 1670 bundleList.toArray(new Bundle[bundleList.size()])); 1671 } else { 1672 String value = parser.nextText().trim(); 1673 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1674 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1675 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1676 restrictions.putInt(key, Integer.parseInt(value)); 1677 } else { 1678 restrictions.putString(key, value); 1679 } 1680 } 1681 } 1682 } 1683 1684 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1685 throws IOException, XmlPullParserException { 1686 Bundle childBundle = new Bundle(); 1687 final int outerDepth = parser.getDepth(); 1688 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1689 readEntry(childBundle, values, parser); 1690 } 1691 return childBundle; 1692 } 1693 1694 private void writeApplicationRestrictionsLocked(String packageName, 1695 Bundle restrictions, int userId) { 1696 AtomicFile restrictionsFile = new AtomicFile( 1697 new File(Environment.getUserSystemDirectory(userId), 1698 packageToRestrictionsFileName(packageName))); 1699 writeApplicationRestrictionsLocked(restrictions, restrictionsFile); 1700 } 1701 1702 @VisibleForTesting 1703 static void writeApplicationRestrictionsLocked(Bundle restrictions, 1704 AtomicFile restrictionsFile) { 1705 FileOutputStream fos = null; 1706 try { 1707 fos = restrictionsFile.startWrite(); 1708 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1709 1710 final XmlSerializer serializer = new FastXmlSerializer(); 1711 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1712 serializer.startDocument(null, true); 1713 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1714 1715 serializer.startTag(null, TAG_RESTRICTIONS); 1716 writeBundle(restrictions, serializer); 1717 serializer.endTag(null, TAG_RESTRICTIONS); 1718 1719 serializer.endDocument(); 1720 restrictionsFile.finishWrite(fos); 1721 } catch (Exception e) { 1722 restrictionsFile.failWrite(fos); 1723 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 1724 } 1725 } 1726 1727 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1728 throws IOException { 1729 for (String key : restrictions.keySet()) { 1730 Object value = restrictions.get(key); 1731 serializer.startTag(null, TAG_ENTRY); 1732 serializer.attribute(null, ATTR_KEY, key); 1733 1734 if (value instanceof Boolean) { 1735 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1736 serializer.text(value.toString()); 1737 } else if (value instanceof Integer) { 1738 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1739 serializer.text(value.toString()); 1740 } else if (value == null || value instanceof String) { 1741 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1742 serializer.text(value != null ? (String) value : ""); 1743 } else if (value instanceof Bundle) { 1744 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1745 writeBundle((Bundle) value, serializer); 1746 } else if (value instanceof Parcelable[]) { 1747 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 1748 Parcelable[] array = (Parcelable[]) value; 1749 for (Parcelable parcelable : array) { 1750 if (!(parcelable instanceof Bundle)) { 1751 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 1752 } 1753 serializer.startTag(null, TAG_ENTRY); 1754 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1755 writeBundle((Bundle) parcelable, serializer); 1756 serializer.endTag(null, TAG_ENTRY); 1757 } 1758 } else { 1759 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1760 String[] values = (String[]) value; 1761 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1762 for (String choice : values) { 1763 serializer.startTag(null, TAG_VALUE); 1764 serializer.text(choice != null ? choice : ""); 1765 serializer.endTag(null, TAG_VALUE); 1766 } 1767 } 1768 serializer.endTag(null, TAG_ENTRY); 1769 } 1770 } 1771 1772 @Override 1773 public int getUserSerialNumber(int userHandle) { 1774 synchronized (mPackagesLock) { 1775 if (!exists(userHandle)) return -1; 1776 return getUserInfoLocked(userHandle).serialNumber; 1777 } 1778 } 1779 1780 @Override 1781 public int getUserHandle(int userSerialNumber) { 1782 synchronized (mPackagesLock) { 1783 for (int userId : mUserIds) { 1784 UserInfo info = getUserInfoLocked(userId); 1785 if (info != null && info.serialNumber == userSerialNumber) return userId; 1786 } 1787 // Not found 1788 return -1; 1789 } 1790 } 1791 1792 @Override 1793 public long getUserCreationTime(int userHandle) { 1794 int callingUserId = UserHandle.getCallingUserId(); 1795 UserInfo userInfo = null; 1796 synchronized (mPackagesLock) { 1797 if (callingUserId == userHandle) { 1798 userInfo = getUserInfoLocked(userHandle); 1799 } else { 1800 UserInfo parent = getProfileParentLocked(userHandle); 1801 if (parent != null && parent.id == callingUserId) { 1802 userInfo = getUserInfoLocked(userHandle); 1803 } 1804 } 1805 } 1806 if (userInfo == null) { 1807 throw new SecurityException("userHandle can only be the calling user or a managed " 1808 + "profile associated with this user"); 1809 } 1810 return userInfo.creationTime; 1811 } 1812 1813 /** 1814 * Caches the list of user ids in an array, adjusting the array size when necessary. 1815 */ 1816 private void updateUserIdsLocked() { 1817 int num = 0; 1818 for (int i = 0; i < mUsers.size(); i++) { 1819 if (!mUsers.valueAt(i).partial) { 1820 num++; 1821 } 1822 } 1823 final int[] newUsers = new int[num]; 1824 int n = 0; 1825 for (int i = 0; i < mUsers.size(); i++) { 1826 if (!mUsers.valueAt(i).partial) { 1827 newUsers[n++] = mUsers.keyAt(i); 1828 } 1829 } 1830 mUserIds = newUsers; 1831 } 1832 1833 /** 1834 * Make a note of the last started time of a user and do some cleanup. 1835 * @param userId the user that was just foregrounded 1836 */ 1837 public void onUserForeground(int userId) { 1838 synchronized (mPackagesLock) { 1839 UserInfo user = mUsers.get(userId); 1840 long now = System.currentTimeMillis(); 1841 if (user == null || user.partial) { 1842 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1843 return; 1844 } 1845 if (now > EPOCH_PLUS_30_YEARS) { 1846 user.lastLoggedInTime = now; 1847 scheduleWriteUserLocked(user); 1848 } 1849 } 1850 } 1851 1852 /** 1853 * Returns the next available user id, filling in any holes in the ids. 1854 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1855 * for data and battery stats collection, or unexpected cross-talk. 1856 * @return 1857 */ 1858 private int getNextAvailableIdLocked() { 1859 synchronized (mPackagesLock) { 1860 int i = MIN_USER_ID; 1861 while (i < Integer.MAX_VALUE) { 1862 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1863 break; 1864 } 1865 i++; 1866 } 1867 return i; 1868 } 1869 } 1870 1871 private String packageToRestrictionsFileName(String packageName) { 1872 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1873 } 1874 1875 /** 1876 * Create new {@code /data/user/[id]} directory and sets default 1877 * permissions. 1878 */ 1879 public static void prepareUserDirectory(Context context, String volumeUuid, int userId) { 1880 final StorageManager storage = context.getSystemService(StorageManager.class); 1881 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 1882 storage.createNewUserDir(userId, userDir); 1883 } 1884 1885 /** 1886 * Enforce that serial number stored in user directory inode matches the 1887 * given expected value. Gracefully sets the serial number if currently 1888 * undefined. 1889 * 1890 * @throws IOException when problem extracting serial number, or serial 1891 * number is mismatched. 1892 */ 1893 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 1894 final int foundSerial = getSerialNumber(file); 1895 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 1896 1897 if (foundSerial == -1) { 1898 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 1899 try { 1900 setSerialNumber(file, serialNumber); 1901 } catch (IOException e) { 1902 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 1903 } 1904 1905 } else if (foundSerial != serialNumber) { 1906 throw new IOException("Found serial number " + foundSerial 1907 + " doesn't match expected " + serialNumber); 1908 } 1909 } 1910 1911 /** 1912 * Set serial number stored in user directory inode. 1913 * 1914 * @throws IOException if serial number was already set 1915 */ 1916 private static void setSerialNumber(File file, int serialNumber) 1917 throws IOException { 1918 try { 1919 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 1920 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 1921 } catch (ErrnoException e) { 1922 throw e.rethrowAsIOException(); 1923 } 1924 } 1925 1926 /** 1927 * Return serial number stored in user directory inode. 1928 * 1929 * @return parsed serial number, or -1 if not set 1930 */ 1931 private static int getSerialNumber(File file) throws IOException { 1932 try { 1933 final byte[] buf = new byte[256]; 1934 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 1935 final String serial = new String(buf, 0, len); 1936 try { 1937 return Integer.parseInt(serial); 1938 } catch (NumberFormatException e) { 1939 throw new IOException("Bad serial number: " + serial); 1940 } 1941 } catch (ErrnoException e) { 1942 if (e.errno == OsConstants.ENODATA) { 1943 return -1; 1944 } else { 1945 throw e.rethrowAsIOException(); 1946 } 1947 } 1948 } 1949 1950 @Override 1951 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1952 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1953 != PackageManager.PERMISSION_GRANTED) { 1954 pw.println("Permission Denial: can't dump UserManager from from pid=" 1955 + Binder.getCallingPid() 1956 + ", uid=" + Binder.getCallingUid() 1957 + " without permission " 1958 + android.Manifest.permission.DUMP); 1959 return; 1960 } 1961 1962 long now = System.currentTimeMillis(); 1963 StringBuilder sb = new StringBuilder(); 1964 synchronized (mPackagesLock) { 1965 pw.println("Users:"); 1966 for (int i = 0; i < mUsers.size(); i++) { 1967 UserInfo user = mUsers.valueAt(i); 1968 if (user == null) continue; 1969 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1970 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1971 if (user.partial) pw.print(" <partial>"); 1972 pw.println(); 1973 pw.print(" Created: "); 1974 if (user.creationTime == 0) { 1975 pw.println("<unknown>"); 1976 } else { 1977 sb.setLength(0); 1978 TimeUtils.formatDuration(now - user.creationTime, sb); 1979 sb.append(" ago"); 1980 pw.println(sb); 1981 } 1982 pw.print(" Last logged in: "); 1983 if (user.lastLoggedInTime == 0) { 1984 pw.println("<unknown>"); 1985 } else { 1986 sb.setLength(0); 1987 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1988 sb.append(" ago"); 1989 pw.println(sb); 1990 } 1991 } 1992 } 1993 } 1994 1995 final class MainHandler extends Handler { 1996 1997 @Override 1998 public void handleMessage(Message msg) { 1999 switch (msg.what) { 2000 case WRITE_USER_MSG: 2001 removeMessages(WRITE_USER_MSG, msg.obj); 2002 synchronized (mPackagesLock) { 2003 int userId = ((UserInfo) msg.obj).id; 2004 UserInfo userInfo = mUsers.get(userId); 2005 if (userInfo != null) { 2006 writeUserLocked(userInfo); 2007 } 2008 } 2009 } 2010 } 2011 } 2012} 2013