UserManagerService.java revision 5cc9a7a801f3a1995cbb2a7dae3f9a716d51df0e
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, String.valueOf(UserHandle.USER_SYSTEM)); 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_SYSTEM); 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 UserInfo getPrimaryUser() { 264 checkManageUsersPermission("query users"); 265 synchronized (mPackagesLock) { 266 for (int i = 0; i < mUsers.size(); i++) { 267 UserInfo ui = mUsers.valueAt(i); 268 if (ui.isPrimary()) { 269 return ui; 270 } 271 } 272 } 273 return null; 274 } 275 276 @Override 277 public List<UserInfo> getUsers(boolean excludeDying) { 278 checkManageUsersPermission("query users"); 279 synchronized (mPackagesLock) { 280 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 281 for (int i = 0; i < mUsers.size(); i++) { 282 UserInfo ui = mUsers.valueAt(i); 283 if (ui.partial) { 284 continue; 285 } 286 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 287 users.add(ui); 288 } 289 } 290 return users; 291 } 292 } 293 294 @Override 295 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 296 if (userId != UserHandle.getCallingUserId()) { 297 checkManageUsersPermission("getting profiles related to user " + userId); 298 } 299 final long ident = Binder.clearCallingIdentity(); 300 try { 301 synchronized (mPackagesLock) { 302 return getProfilesLocked(userId, enabledOnly); 303 } 304 } finally { 305 Binder.restoreCallingIdentity(ident); 306 } 307 } 308 309 /** Assume permissions already checked and caller's identity cleared */ 310 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 311 UserInfo user = getUserInfoLocked(userId); 312 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 313 if (user == null) { 314 // Probably a dying user 315 return users; 316 } 317 for (int i = 0; i < mUsers.size(); i++) { 318 UserInfo profile = mUsers.valueAt(i); 319 if (!isProfileOf(user, profile)) { 320 continue; 321 } 322 if (enabledOnly && !profile.isEnabled()) { 323 continue; 324 } 325 if (mRemovingUserIds.get(profile.id)) { 326 continue; 327 } 328 users.add(profile); 329 } 330 return users; 331 } 332 333 @Override 334 public UserInfo getProfileParent(int userHandle) { 335 checkManageUsersPermission("get the profile parent"); 336 synchronized (mPackagesLock) { 337 return getProfileParentLocked(userHandle); 338 } 339 } 340 341 private UserInfo getProfileParentLocked(int userHandle) { 342 UserInfo profile = getUserInfoLocked(userHandle); 343 if (profile == null) { 344 return null; 345 } 346 int parentUserId = profile.profileGroupId; 347 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 348 return null; 349 } else { 350 return getUserInfoLocked(parentUserId); 351 } 352 } 353 354 private boolean isProfileOf(UserInfo user, UserInfo profile) { 355 return user.id == profile.id || 356 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 357 && user.profileGroupId == profile.profileGroupId); 358 } 359 360 @Override 361 public void setUserEnabled(int userId) { 362 checkManageUsersPermission("enable user"); 363 synchronized (mPackagesLock) { 364 UserInfo info = getUserInfoLocked(userId); 365 if (info != null && !info.isEnabled()) { 366 info.flags ^= UserInfo.FLAG_DISABLED; 367 writeUserLocked(info); 368 } 369 } 370 } 371 372 @Override 373 public UserInfo getUserInfo(int userId) { 374 checkManageUsersPermission("query user"); 375 synchronized (mPackagesLock) { 376 return getUserInfoLocked(userId); 377 } 378 } 379 380 @Override 381 public boolean isRestricted() { 382 synchronized (mPackagesLock) { 383 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 384 } 385 } 386 387 /* 388 * Should be locked on mUsers before calling this. 389 */ 390 private UserInfo getUserInfoLocked(int userId) { 391 UserInfo ui = mUsers.get(userId); 392 // If it is partial and not in the process of being removed, return as unknown user. 393 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 394 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 395 return null; 396 } 397 return ui; 398 } 399 400 public boolean exists(int userId) { 401 synchronized (mPackagesLock) { 402 return ArrayUtils.contains(mUserIds, userId); 403 } 404 } 405 406 @Override 407 public void setUserName(int userId, String name) { 408 checkManageUsersPermission("rename users"); 409 boolean changed = false; 410 synchronized (mPackagesLock) { 411 UserInfo info = mUsers.get(userId); 412 if (info == null || info.partial) { 413 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 414 return; 415 } 416 if (name != null && !name.equals(info.name)) { 417 info.name = name; 418 writeUserLocked(info); 419 changed = true; 420 } 421 } 422 if (changed) { 423 sendUserInfoChangedBroadcast(userId); 424 } 425 } 426 427 @Override 428 public void setUserIcon(int userId, Bitmap bitmap) { 429 checkManageUsersPermission("update users"); 430 long ident = Binder.clearCallingIdentity(); 431 try { 432 synchronized (mPackagesLock) { 433 UserInfo info = mUsers.get(userId); 434 if (info == null || info.partial) { 435 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 436 return; 437 } 438 writeBitmapLocked(info, bitmap); 439 writeUserLocked(info); 440 } 441 sendUserInfoChangedBroadcast(userId); 442 } finally { 443 Binder.restoreCallingIdentity(ident); 444 } 445 } 446 447 private void sendUserInfoChangedBroadcast(int userId) { 448 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 449 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 450 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 451 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 452 } 453 454 @Override 455 public ParcelFileDescriptor getUserIcon(int userId) { 456 String iconPath; 457 synchronized (mPackagesLock) { 458 UserInfo info = mUsers.get(userId); 459 if (info == null || info.partial) { 460 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 461 return null; 462 } 463 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 464 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 465 || callingGroupId != info.profileGroupId) { 466 checkManageUsersPermission("get the icon of a user who is not related"); 467 } 468 if (info.iconPath == null) { 469 return null; 470 } 471 iconPath = info.iconPath; 472 } 473 474 try { 475 return ParcelFileDescriptor.open( 476 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 477 } catch (FileNotFoundException e) { 478 Log.e(LOG_TAG, "Couldn't find icon file", e); 479 } 480 return null; 481 } 482 483 public void makeInitialized(int userId) { 484 checkManageUsersPermission("makeInitialized"); 485 synchronized (mPackagesLock) { 486 UserInfo info = mUsers.get(userId); 487 if (info == null || info.partial) { 488 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 489 } 490 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 491 info.flags |= UserInfo.FLAG_INITIALIZED; 492 scheduleWriteUserLocked(info); 493 } 494 } 495 } 496 497 /** 498 * If default guest restrictions haven't been initialized yet, add the basic 499 * restrictions. 500 */ 501 private void initDefaultGuestRestrictions() { 502 if (mGuestRestrictions.isEmpty()) { 503 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 504 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 505 } 506 } 507 508 @Override 509 public Bundle getDefaultGuestRestrictions() { 510 checkManageUsersPermission("getDefaultGuestRestrictions"); 511 synchronized (mPackagesLock) { 512 return new Bundle(mGuestRestrictions); 513 } 514 } 515 516 @Override 517 public void setDefaultGuestRestrictions(Bundle restrictions) { 518 checkManageUsersPermission("setDefaultGuestRestrictions"); 519 synchronized (mPackagesLock) { 520 mGuestRestrictions.clear(); 521 mGuestRestrictions.putAll(restrictions); 522 writeUserListLocked(); 523 } 524 } 525 526 @Override 527 public boolean hasUserRestriction(String restrictionKey, int userId) { 528 synchronized (mPackagesLock) { 529 Bundle restrictions = mUserRestrictions.get(userId); 530 return restrictions != null && restrictions.getBoolean(restrictionKey); 531 } 532 } 533 534 @Override 535 public Bundle getUserRestrictions(int userId) { 536 // checkManageUsersPermission("getUserRestrictions"); 537 538 synchronized (mPackagesLock) { 539 Bundle restrictions = mUserRestrictions.get(userId); 540 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 541 } 542 } 543 544 @Override 545 public void setUserRestriction(String key, boolean value, int userId) { 546 synchronized (mPackagesLock) { 547 if (!SYSTEM_CONTROLLED_RESTRICTIONS.contains(key)) { 548 Bundle restrictions = getUserRestrictions(userId); 549 restrictions.putBoolean(key, value); 550 setUserRestrictionsInternalLocked(restrictions, userId); 551 } 552 } 553 } 554 555 @Override 556 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 557 checkSystemOrRoot("setSystemControlledUserRestriction"); 558 synchronized (mPackagesLock) { 559 Bundle restrictions = getUserRestrictions(userId); 560 restrictions.putBoolean(key, value); 561 setUserRestrictionsInternalLocked(restrictions, userId); 562 } 563 } 564 565 @Override 566 public void setUserRestrictions(Bundle restrictions, int userId) { 567 checkManageUsersPermission("setUserRestrictions"); 568 if (restrictions == null) return; 569 570 synchronized (mPackagesLock) { 571 final Bundle oldUserRestrictions = mUserRestrictions.get(userId); 572 // Restore the original state of system controlled restrictions from oldUserRestrictions 573 for (String key : SYSTEM_CONTROLLED_RESTRICTIONS) { 574 restrictions.remove(key); 575 if (oldUserRestrictions.containsKey(key)) { 576 restrictions.putBoolean(key, oldUserRestrictions.getBoolean(key)); 577 } 578 } 579 setUserRestrictionsInternalLocked(restrictions, userId); 580 } 581 } 582 583 private void setUserRestrictionsInternalLocked(Bundle restrictions, int userId) { 584 final Bundle userRestrictions = mUserRestrictions.get(userId); 585 userRestrictions.clear(); 586 userRestrictions.putAll(restrictions); 587 long token = Binder.clearCallingIdentity(); 588 try { 589 mAppOpsService.setUserRestrictions(userRestrictions, userId); 590 } catch (RemoteException e) { 591 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 592 } finally { 593 Binder.restoreCallingIdentity(token); 594 } 595 scheduleWriteUserLocked(mUsers.get(userId)); 596 } 597 598 /** 599 * Check if we've hit the limit of how many users can be created. 600 */ 601 private boolean isUserLimitReachedLocked() { 602 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 603 } 604 605 @Override 606 public boolean canAddMoreManagedProfiles() { 607 checkManageUsersPermission("check if more managed profiles can be added."); 608 if (ActivityManager.isLowRamDeviceStatic()) { 609 return false; 610 } 611 if (!mContext.getPackageManager().hasSystemFeature( 612 PackageManager.FEATURE_MANAGED_USERS)) { 613 return false; 614 } 615 synchronized(mPackagesLock) { 616 // Limit number of managed profiles that can be created 617 if (numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 618 >= MAX_MANAGED_PROFILES) { 619 return false; 620 } 621 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 622 // We allow creating a managed profile in the special case where there is only one user. 623 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 624 } 625 } 626 627 private int getAliveUsersExcludingGuestsCountLocked() { 628 int aliveUserCount = 0; 629 final int totalUserCount = mUsers.size(); 630 // Skip over users being removed 631 for (int i = 0; i < totalUserCount; i++) { 632 UserInfo user = mUsers.valueAt(i); 633 if (!mRemovingUserIds.get(user.id) 634 && !user.isGuest() && !user.partial) { 635 aliveUserCount++; 636 } 637 } 638 return aliveUserCount; 639 } 640 641 /** 642 * Enforces that only the system UID or root's UID or apps that have the 643 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 644 * permission can make certain calls to the UserManager. 645 * 646 * @param message used as message if SecurityException is thrown 647 * @throws SecurityException if the caller is not system or root 648 */ 649 private static final void checkManageUsersPermission(String message) { 650 final int uid = Binder.getCallingUid(); 651 if (uid != Process.SYSTEM_UID && uid != 0 652 && ActivityManager.checkComponentPermission( 653 android.Manifest.permission.MANAGE_USERS, 654 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 655 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 656 } 657 } 658 659 private static void checkSystemOrRoot(String message) { 660 final int uid = Binder.getCallingUid(); 661 if (uid != Process.SYSTEM_UID && uid != 0) { 662 throw new SecurityException("Only system may call: " + message); 663 } 664 } 665 666 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 667 try { 668 File dir = new File(mUsersDir, Integer.toString(info.id)); 669 File file = new File(dir, USER_PHOTO_FILENAME); 670 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 671 if (!dir.exists()) { 672 dir.mkdir(); 673 FileUtils.setPermissions( 674 dir.getPath(), 675 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 676 -1, -1); 677 } 678 FileOutputStream os; 679 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 680 && tmp.renameTo(file)) { 681 info.iconPath = file.getAbsolutePath(); 682 } 683 try { 684 os.close(); 685 } catch (IOException ioe) { 686 // What the ... ! 687 } 688 tmp.delete(); 689 } catch (FileNotFoundException e) { 690 Slog.w(LOG_TAG, "Error setting photo for user ", e); 691 } 692 } 693 694 /** 695 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 696 * cache it elsewhere. 697 * @return the array of user ids. 698 */ 699 public int[] getUserIds() { 700 synchronized (mPackagesLock) { 701 return mUserIds; 702 } 703 } 704 705 int[] getUserIdsLPr() { 706 return mUserIds; 707 } 708 709 private void readUserListLocked() { 710 if (!mUserListFile.exists()) { 711 fallbackToSingleUserLocked(); 712 return; 713 } 714 FileInputStream fis = null; 715 AtomicFile userListFile = new AtomicFile(mUserListFile); 716 try { 717 fis = userListFile.openRead(); 718 XmlPullParser parser = Xml.newPullParser(); 719 parser.setInput(fis, StandardCharsets.UTF_8.name()); 720 int type; 721 while ((type = parser.next()) != XmlPullParser.START_TAG 722 && type != XmlPullParser.END_DOCUMENT) { 723 ; 724 } 725 726 if (type != XmlPullParser.START_TAG) { 727 Slog.e(LOG_TAG, "Unable to read user list"); 728 fallbackToSingleUserLocked(); 729 return; 730 } 731 732 mNextSerialNumber = -1; 733 if (parser.getName().equals(TAG_USERS)) { 734 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 735 if (lastSerialNumber != null) { 736 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 737 } 738 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 739 if (versionNumber != null) { 740 mUserVersion = Integer.parseInt(versionNumber); 741 } 742 } 743 744 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 745 if (type == XmlPullParser.START_TAG) { 746 final String name = parser.getName(); 747 if (name.equals(TAG_USER)) { 748 String id = parser.getAttributeValue(null, ATTR_ID); 749 UserInfo user = readUserLocked(Integer.parseInt(id)); 750 751 if (user != null) { 752 mUsers.put(user.id, user); 753 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 754 mNextSerialNumber = user.id + 1; 755 } 756 } 757 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 758 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 759 && type != XmlPullParser.END_TAG) { 760 if (type == XmlPullParser.START_TAG) { 761 if (parser.getName().equals(TAG_RESTRICTIONS)) { 762 readRestrictionsLocked(parser, mGuestRestrictions); 763 } 764 break; 765 } 766 } 767 } 768 } 769 } 770 updateUserIdsLocked(); 771 upgradeIfNecessaryLocked(); 772 } catch (IOException ioe) { 773 fallbackToSingleUserLocked(); 774 } catch (XmlPullParserException pe) { 775 fallbackToSingleUserLocked(); 776 } finally { 777 if (fis != null) { 778 try { 779 fis.close(); 780 } catch (IOException e) { 781 } 782 } 783 } 784 } 785 786 /** 787 * Upgrade steps between versions, either for fixing bugs or changing the data format. 788 */ 789 private void upgradeIfNecessaryLocked() { 790 int userVersion = mUserVersion; 791 if (userVersion < 1) { 792 // Assign a proper name for the owner, if not initialized correctly before 793 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 794 if ("Primary".equals(user.name)) { 795 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 796 scheduleWriteUserLocked(user); 797 } 798 userVersion = 1; 799 } 800 801 if (userVersion < 2) { 802 // Owner should be marked as initialized 803 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 804 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 805 user.flags |= UserInfo.FLAG_INITIALIZED; 806 scheduleWriteUserLocked(user); 807 } 808 userVersion = 2; 809 } 810 811 812 if (userVersion < 4) { 813 userVersion = 4; 814 } 815 816 if (userVersion < 5) { 817 initDefaultGuestRestrictions(); 818 userVersion = 5; 819 } 820 821 if (userVersion < USER_VERSION) { 822 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 823 + USER_VERSION); 824 } else { 825 mUserVersion = userVersion; 826 writeUserListLocked(); 827 } 828 } 829 830 private void fallbackToSingleUserLocked() { 831 // Create the system user 832 // TODO: UserInfo.FLAG_PRIMARY flag should be set on the first human user. 833 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 834 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 835 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 836 mUsers.put(system.id, system); 837 mNextSerialNumber = MIN_USER_ID; 838 mUserVersion = USER_VERSION; 839 840 Bundle restrictions = new Bundle(); 841 mUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 842 843 updateUserIdsLocked(); 844 initDefaultGuestRestrictions(); 845 846 writeUserListLocked(); 847 writeUserLocked(system); 848 } 849 850 private void scheduleWriteUserLocked(UserInfo userInfo) { 851 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 852 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 853 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 854 } 855 } 856 857 /* 858 * Writes the user file in this format: 859 * 860 * <user flags="20039023" id="0"> 861 * <name>Primary</name> 862 * </user> 863 */ 864 private void writeUserLocked(UserInfo userInfo) { 865 FileOutputStream fos = null; 866 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 867 try { 868 fos = userFile.startWrite(); 869 final BufferedOutputStream bos = new BufferedOutputStream(fos); 870 871 // XmlSerializer serializer = XmlUtils.serializerInstance(); 872 final XmlSerializer serializer = new FastXmlSerializer(); 873 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 874 serializer.startDocument(null, true); 875 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 876 877 serializer.startTag(null, TAG_USER); 878 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 879 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 880 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 881 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 882 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 883 Long.toString(userInfo.lastLoggedInTime)); 884 if (userInfo.iconPath != null) { 885 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 886 } 887 if (userInfo.partial) { 888 serializer.attribute(null, ATTR_PARTIAL, "true"); 889 } 890 if (userInfo.guestToRemove) { 891 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 892 } 893 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 894 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 895 Integer.toString(userInfo.profileGroupId)); 896 } 897 898 serializer.startTag(null, TAG_NAME); 899 serializer.text(userInfo.name); 900 serializer.endTag(null, TAG_NAME); 901 Bundle restrictions = mUserRestrictions.get(userInfo.id); 902 if (restrictions != null) { 903 writeRestrictionsLocked(serializer, restrictions); 904 } 905 serializer.endTag(null, TAG_USER); 906 907 serializer.endDocument(); 908 userFile.finishWrite(fos); 909 } catch (Exception ioe) { 910 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 911 userFile.failWrite(fos); 912 } 913 } 914 915 /* 916 * Writes the user list file in this format: 917 * 918 * <users nextSerialNumber="3"> 919 * <user id="0"></user> 920 * <user id="2"></user> 921 * </users> 922 */ 923 private void writeUserListLocked() { 924 FileOutputStream fos = null; 925 AtomicFile userListFile = new AtomicFile(mUserListFile); 926 try { 927 fos = userListFile.startWrite(); 928 final BufferedOutputStream bos = new BufferedOutputStream(fos); 929 930 // XmlSerializer serializer = XmlUtils.serializerInstance(); 931 final XmlSerializer serializer = new FastXmlSerializer(); 932 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 933 serializer.startDocument(null, true); 934 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 935 936 serializer.startTag(null, TAG_USERS); 937 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 938 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 939 940 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 941 writeRestrictionsLocked(serializer, mGuestRestrictions); 942 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 943 for (int i = 0; i < mUsers.size(); i++) { 944 UserInfo user = mUsers.valueAt(i); 945 serializer.startTag(null, TAG_USER); 946 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 947 serializer.endTag(null, TAG_USER); 948 } 949 950 serializer.endTag(null, TAG_USERS); 951 952 serializer.endDocument(); 953 userListFile.finishWrite(fos); 954 } catch (Exception e) { 955 userListFile.failWrite(fos); 956 Slog.e(LOG_TAG, "Error writing user list"); 957 } 958 } 959 960 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 961 throws IOException { 962 serializer.startTag(null, TAG_RESTRICTIONS); 963 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 964 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 965 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 966 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 967 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 968 writeBoolean(serializer, restrictions, 969 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 970 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 971 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 972 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 973 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 974 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 975 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 976 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 977 writeBoolean(serializer, restrictions, UserManager.DISALLOW_NETWORK_RESET); 978 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 979 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 980 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 981 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 982 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 983 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 984 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 985 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 986 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 987 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 988 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 989 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FUN); 990 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 991 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 992 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 993 writeBoolean(serializer, restrictions, UserManager.DISALLOW_WALLPAPER); 994 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SAFE_BOOT); 995 writeBoolean(serializer, restrictions, UserManager.ALLOW_PARENT_PROFILE_APP_LINKING); 996 serializer.endTag(null, TAG_RESTRICTIONS); 997 } 998 999 private UserInfo readUserLocked(int id) { 1000 int flags = 0; 1001 int serialNumber = id; 1002 String name = null; 1003 String iconPath = null; 1004 long creationTime = 0L; 1005 long lastLoggedInTime = 0L; 1006 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1007 boolean partial = false; 1008 boolean guestToRemove = false; 1009 Bundle restrictions = new Bundle(); 1010 1011 FileInputStream fis = null; 1012 try { 1013 AtomicFile userFile = 1014 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1015 fis = userFile.openRead(); 1016 XmlPullParser parser = Xml.newPullParser(); 1017 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1018 int type; 1019 while ((type = parser.next()) != XmlPullParser.START_TAG 1020 && type != XmlPullParser.END_DOCUMENT) { 1021 ; 1022 } 1023 1024 if (type != XmlPullParser.START_TAG) { 1025 Slog.e(LOG_TAG, "Unable to read user " + id); 1026 return null; 1027 } 1028 1029 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1030 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1031 if (storedId != id) { 1032 Slog.e(LOG_TAG, "User id does not match the file name"); 1033 return null; 1034 } 1035 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1036 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1037 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1038 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1039 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1040 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1041 UserInfo.NO_PROFILE_GROUP_ID); 1042 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1043 if ("true".equals(valueString)) { 1044 partial = true; 1045 } 1046 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1047 if ("true".equals(valueString)) { 1048 guestToRemove = true; 1049 } 1050 1051 int outerDepth = parser.getDepth(); 1052 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1053 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1054 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1055 continue; 1056 } 1057 String tag = parser.getName(); 1058 if (TAG_NAME.equals(tag)) { 1059 type = parser.next(); 1060 if (type == XmlPullParser.TEXT) { 1061 name = parser.getText(); 1062 } 1063 } else if (TAG_RESTRICTIONS.equals(tag)) { 1064 readRestrictionsLocked(parser, restrictions); 1065 } 1066 } 1067 } 1068 1069 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1070 userInfo.serialNumber = serialNumber; 1071 userInfo.creationTime = creationTime; 1072 userInfo.lastLoggedInTime = lastLoggedInTime; 1073 userInfo.partial = partial; 1074 userInfo.guestToRemove = guestToRemove; 1075 userInfo.profileGroupId = profileGroupId; 1076 mUserRestrictions.append(id, restrictions); 1077 return userInfo; 1078 1079 } catch (IOException ioe) { 1080 } catch (XmlPullParserException pe) { 1081 } finally { 1082 if (fis != null) { 1083 try { 1084 fis.close(); 1085 } catch (IOException e) { 1086 } 1087 } 1088 } 1089 return null; 1090 } 1091 1092 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1093 throws IOException { 1094 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1095 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1096 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1097 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1098 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1099 readBoolean(parser, restrictions, 1100 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1101 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1102 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1103 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1104 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1105 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1106 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1107 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1108 readBoolean(parser, restrictions, UserManager.DISALLOW_NETWORK_RESET); 1109 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1110 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1111 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1112 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1113 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1114 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1115 readBoolean(parser, restrictions, 1116 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1117 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1118 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1119 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1120 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1121 readBoolean(parser, restrictions, UserManager.DISALLOW_FUN); 1122 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1123 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1124 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1125 readBoolean(parser, restrictions, UserManager.DISALLOW_WALLPAPER); 1126 readBoolean(parser, restrictions, UserManager.DISALLOW_SAFE_BOOT); 1127 readBoolean(parser, restrictions, UserManager.ALLOW_PARENT_PROFILE_APP_LINKING); 1128 } 1129 1130 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1131 String restrictionKey) { 1132 String value = parser.getAttributeValue(null, restrictionKey); 1133 if (value != null) { 1134 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1135 } 1136 } 1137 1138 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1139 throws IOException { 1140 if (restrictions.containsKey(restrictionKey)) { 1141 xml.attribute(null, restrictionKey, 1142 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1143 } 1144 } 1145 1146 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1147 String valueString = parser.getAttributeValue(null, attr); 1148 if (valueString == null) return defaultValue; 1149 try { 1150 return Integer.parseInt(valueString); 1151 } catch (NumberFormatException nfe) { 1152 return defaultValue; 1153 } 1154 } 1155 1156 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1157 String valueString = parser.getAttributeValue(null, attr); 1158 if (valueString == null) return defaultValue; 1159 try { 1160 return Long.parseLong(valueString); 1161 } catch (NumberFormatException nfe) { 1162 return defaultValue; 1163 } 1164 } 1165 1166 private boolean isPackageInstalled(String pkg, int userId) { 1167 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1168 PackageManager.GET_UNINSTALLED_PACKAGES, 1169 userId); 1170 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1171 return false; 1172 } 1173 return true; 1174 } 1175 1176 /** 1177 * Removes all the restrictions files (res_<packagename>) for a given user. 1178 * Does not do any permissions checking. 1179 */ 1180 private void cleanAppRestrictions(int userId) { 1181 synchronized (mPackagesLock) { 1182 File dir = Environment.getUserSystemDirectory(userId); 1183 String[] files = dir.list(); 1184 if (files == null) return; 1185 for (String fileName : files) { 1186 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1187 File resFile = new File(dir, fileName); 1188 if (resFile.exists()) { 1189 resFile.delete(); 1190 } 1191 } 1192 } 1193 } 1194 } 1195 1196 /** 1197 * Removes the app restrictions file for a specific package and user id, if it exists. 1198 */ 1199 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1200 synchronized (mPackagesLock) { 1201 File dir = Environment.getUserSystemDirectory(userId); 1202 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1203 if (resFile.exists()) { 1204 resFile.delete(); 1205 } 1206 } 1207 } 1208 1209 @Override 1210 public UserInfo createProfileForUser(String name, int flags, int userId) { 1211 checkManageUsersPermission("Only the system can create users"); 1212 if (userId != UserHandle.USER_OWNER) { 1213 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1214 return null; 1215 } 1216 return createUserInternal(name, flags, userId); 1217 } 1218 1219 @Override 1220 public UserInfo createUser(String name, int flags) { 1221 checkManageUsersPermission("Only the system can create users"); 1222 return createUserInternal(name, flags, UserHandle.USER_NULL); 1223 } 1224 1225 private UserInfo createUserInternal(String name, int flags, int parentId) { 1226 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1227 UserManager.DISALLOW_ADD_USER, false)) { 1228 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1229 return null; 1230 } 1231 if (ActivityManager.isLowRamDeviceStatic()) { 1232 return null; 1233 } 1234 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1235 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1236 final long ident = Binder.clearCallingIdentity(); 1237 UserInfo userInfo = null; 1238 final int userId; 1239 try { 1240 synchronized (mInstallLock) { 1241 synchronized (mPackagesLock) { 1242 UserInfo parent = null; 1243 if (parentId != UserHandle.USER_NULL) { 1244 parent = getUserInfoLocked(parentId); 1245 if (parent == null) return null; 1246 } 1247 if (isManagedProfile && !canAddMoreManagedProfiles()) { 1248 return null; 1249 } 1250 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1251 // If we're not adding a guest user or a managed profile and the limit has 1252 // been reached, cannot add a user. 1253 return null; 1254 } 1255 // If we're adding a guest and there already exists one, bail. 1256 if (isGuest && findCurrentGuestUserLocked() != null) { 1257 return null; 1258 } 1259 userId = getNextAvailableIdLocked(); 1260 userInfo = new UserInfo(userId, name, null, flags); 1261 userInfo.serialNumber = mNextSerialNumber++; 1262 long now = System.currentTimeMillis(); 1263 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1264 userInfo.partial = true; 1265 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1266 mUsers.put(userId, userInfo); 1267 writeUserListLocked(); 1268 if (parent != null) { 1269 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1270 parent.profileGroupId = parent.id; 1271 scheduleWriteUserLocked(parent); 1272 } 1273 userInfo.profileGroupId = parent.profileGroupId; 1274 } 1275 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1276 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1277 final String volumeUuid = vol.getFsUuid(); 1278 try { 1279 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1280 userId); 1281 prepareUserDirectory(mContext, volumeUuid, userId); 1282 enforceSerialNumber(userDir, userInfo.serialNumber); 1283 } catch (IOException e) { 1284 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1285 } 1286 } 1287 mPm.createNewUserLILPw(userId); 1288 userInfo.partial = false; 1289 scheduleWriteUserLocked(userInfo); 1290 updateUserIdsLocked(); 1291 Bundle restrictions = new Bundle(); 1292 mUserRestrictions.append(userId, restrictions); 1293 } 1294 } 1295 mPm.newUserCreated(userId); 1296 if (userInfo != null) { 1297 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1298 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1299 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1300 android.Manifest.permission.MANAGE_USERS); 1301 } 1302 } finally { 1303 Binder.restoreCallingIdentity(ident); 1304 } 1305 return userInfo; 1306 } 1307 1308 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1309 int count = 0; 1310 for (int i = mUsers.size() - 1; i >= 0; i--) { 1311 UserInfo user = mUsers.valueAt(i); 1312 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1313 if ((user.flags & flags) != 0) { 1314 count++; 1315 } 1316 } 1317 } 1318 return count; 1319 } 1320 1321 /** 1322 * Find the current guest user. If the Guest user is partial, 1323 * then do not include it in the results as it is about to die. 1324 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1325 * the special handling of Guests being removed. 1326 */ 1327 private UserInfo findCurrentGuestUserLocked() { 1328 final int size = mUsers.size(); 1329 for (int i = 0; i < size; i++) { 1330 final UserInfo user = mUsers.valueAt(i); 1331 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1332 return user; 1333 } 1334 } 1335 return null; 1336 } 1337 1338 /** 1339 * Mark this guest user for deletion to allow us to create another guest 1340 * and switch to that user before actually removing this guest. 1341 * @param userHandle the userid of the current guest 1342 * @return whether the user could be marked for deletion 1343 */ 1344 public boolean markGuestForDeletion(int userHandle) { 1345 checkManageUsersPermission("Only the system can remove users"); 1346 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1347 UserManager.DISALLOW_REMOVE_USER, false)) { 1348 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1349 return false; 1350 } 1351 1352 long ident = Binder.clearCallingIdentity(); 1353 try { 1354 final UserInfo user; 1355 synchronized (mPackagesLock) { 1356 user = mUsers.get(userHandle); 1357 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1358 return false; 1359 } 1360 if (!user.isGuest()) { 1361 return false; 1362 } 1363 // We set this to a guest user that is to be removed. This is a temporary state 1364 // where we are allowed to add new Guest users, even if this one is still not 1365 // removed. This user will still show up in getUserInfo() calls. 1366 // If we don't get around to removing this Guest user, it will be purged on next 1367 // startup. 1368 user.guestToRemove = true; 1369 // Mark it as disabled, so that it isn't returned any more when 1370 // profiles are queried. 1371 user.flags |= UserInfo.FLAG_DISABLED; 1372 writeUserLocked(user); 1373 } 1374 } finally { 1375 Binder.restoreCallingIdentity(ident); 1376 } 1377 return true; 1378 } 1379 1380 /** 1381 * Removes a user and all data directories created for that user. This method should be called 1382 * after the user's processes have been terminated. 1383 * @param userHandle the user's id 1384 */ 1385 public boolean removeUser(int userHandle) { 1386 checkManageUsersPermission("Only the system can remove users"); 1387 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1388 UserManager.DISALLOW_REMOVE_USER, false)) { 1389 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1390 return false; 1391 } 1392 1393 long ident = Binder.clearCallingIdentity(); 1394 try { 1395 final UserInfo user; 1396 synchronized (mPackagesLock) { 1397 user = mUsers.get(userHandle); 1398 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1399 return false; 1400 } 1401 1402 // We remember deleted user IDs to prevent them from being 1403 // reused during the current boot; they can still be reused 1404 // after a reboot. 1405 mRemovingUserIds.put(userHandle, true); 1406 1407 try { 1408 mAppOpsService.removeUser(userHandle); 1409 } catch (RemoteException e) { 1410 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1411 } 1412 // Set this to a partially created user, so that the user will be purged 1413 // on next startup, in case the runtime stops now before stopping and 1414 // removing the user completely. 1415 user.partial = true; 1416 // Mark it as disabled, so that it isn't returned any more when 1417 // profiles are queried. 1418 user.flags |= UserInfo.FLAG_DISABLED; 1419 writeUserLocked(user); 1420 } 1421 1422 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1423 && user.isManagedProfile()) { 1424 // Send broadcast to notify system that the user removed was a 1425 // managed user. 1426 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1427 } 1428 1429 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1430 int res; 1431 try { 1432 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1433 new IStopUserCallback.Stub() { 1434 @Override 1435 public void userStopped(int userId) { 1436 finishRemoveUser(userId); 1437 } 1438 @Override 1439 public void userStopAborted(int userId) { 1440 } 1441 }); 1442 } catch (RemoteException e) { 1443 return false; 1444 } 1445 return res == ActivityManager.USER_OP_SUCCESS; 1446 } finally { 1447 Binder.restoreCallingIdentity(ident); 1448 } 1449 } 1450 1451 void finishRemoveUser(final int userHandle) { 1452 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1453 // Let other services shutdown any activity and clean up their state before completely 1454 // wiping the user's system directory and removing from the user list 1455 long ident = Binder.clearCallingIdentity(); 1456 try { 1457 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1458 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1459 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1460 android.Manifest.permission.MANAGE_USERS, 1461 1462 new BroadcastReceiver() { 1463 @Override 1464 public void onReceive(Context context, Intent intent) { 1465 if (DBG) { 1466 Slog.i(LOG_TAG, 1467 "USER_REMOVED broadcast sent, cleaning up user data " 1468 + userHandle); 1469 } 1470 new Thread() { 1471 public void run() { 1472 synchronized (mInstallLock) { 1473 synchronized (mPackagesLock) { 1474 removeUserStateLocked(userHandle); 1475 } 1476 } 1477 } 1478 }.start(); 1479 } 1480 }, 1481 1482 null, Activity.RESULT_OK, null, null); 1483 } finally { 1484 Binder.restoreCallingIdentity(ident); 1485 } 1486 } 1487 1488 private void removeUserStateLocked(final int userHandle) { 1489 mContext.getSystemService(StorageManager.class) 1490 .deleteUserKey(userHandle); 1491 // Cleanup package manager settings 1492 mPm.cleanUpUserLILPw(this, userHandle); 1493 1494 // Remove this user from the list 1495 mUsers.remove(userHandle); 1496 // Remove user file 1497 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1498 userFile.delete(); 1499 // Update the user list 1500 writeUserListLocked(); 1501 updateUserIdsLocked(); 1502 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1503 } 1504 1505 private void removeDirectoryRecursive(File parent) { 1506 if (parent.isDirectory()) { 1507 String[] files = parent.list(); 1508 for (String filename : files) { 1509 File child = new File(parent, filename); 1510 removeDirectoryRecursive(child); 1511 } 1512 } 1513 parent.delete(); 1514 } 1515 1516 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1517 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1518 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1519 Intent.FLAG_RECEIVER_FOREGROUND); 1520 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1521 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1522 } 1523 1524 @Override 1525 public Bundle getApplicationRestrictions(String packageName) { 1526 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1527 } 1528 1529 @Override 1530 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1531 if (UserHandle.getCallingUserId() != userId 1532 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1533 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1534 } 1535 synchronized (mPackagesLock) { 1536 // Read the restrictions from XML 1537 return readApplicationRestrictionsLocked(packageName, userId); 1538 } 1539 } 1540 1541 @Override 1542 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1543 int userId) { 1544 if (UserHandle.getCallingUserId() != userId 1545 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1546 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1547 } 1548 synchronized (mPackagesLock) { 1549 if (restrictions == null || restrictions.isEmpty()) { 1550 cleanAppRestrictionsForPackage(packageName, userId); 1551 } else { 1552 // Write the restrictions to XML 1553 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1554 } 1555 } 1556 1557 if (isPackageInstalled(packageName, userId)) { 1558 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1559 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1560 changeIntent.setPackage(packageName); 1561 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1562 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1563 } 1564 } 1565 1566 @Override 1567 public void removeRestrictions() { 1568 checkManageUsersPermission("Only system can remove restrictions"); 1569 final int userHandle = UserHandle.getCallingUserId(); 1570 removeRestrictionsForUser(userHandle, true); 1571 } 1572 1573 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1574 synchronized (mPackagesLock) { 1575 // Remove all user restrictions 1576 setUserRestrictions(new Bundle(), userHandle); 1577 // Remove any app restrictions 1578 cleanAppRestrictions(userHandle); 1579 } 1580 if (unhideApps) { 1581 unhideAllInstalledAppsForUser(userHandle); 1582 } 1583 } 1584 1585 private void unhideAllInstalledAppsForUser(final int userHandle) { 1586 mHandler.post(new Runnable() { 1587 @Override 1588 public void run() { 1589 List<ApplicationInfo> apps = 1590 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1591 userHandle).getList(); 1592 final long ident = Binder.clearCallingIdentity(); 1593 try { 1594 for (ApplicationInfo appInfo : apps) { 1595 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1596 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1597 != 0) { 1598 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1599 userHandle); 1600 } 1601 } 1602 } finally { 1603 Binder.restoreCallingIdentity(ident); 1604 } 1605 } 1606 }); 1607 } 1608 private int getUidForPackage(String packageName) { 1609 long ident = Binder.clearCallingIdentity(); 1610 try { 1611 return mContext.getPackageManager().getApplicationInfo(packageName, 1612 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1613 } catch (NameNotFoundException nnfe) { 1614 return -1; 1615 } finally { 1616 Binder.restoreCallingIdentity(ident); 1617 } 1618 } 1619 1620 private Bundle readApplicationRestrictionsLocked(String packageName, 1621 int userId) { 1622 AtomicFile restrictionsFile = 1623 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1624 packageToRestrictionsFileName(packageName))); 1625 return readApplicationRestrictionsLocked(restrictionsFile); 1626 } 1627 1628 @VisibleForTesting 1629 static Bundle readApplicationRestrictionsLocked(AtomicFile restrictionsFile) { 1630 final Bundle restrictions = new Bundle(); 1631 final ArrayList<String> values = new ArrayList<>(); 1632 if (!restrictionsFile.getBaseFile().exists()) { 1633 return restrictions; 1634 } 1635 1636 FileInputStream fis = null; 1637 try { 1638 fis = restrictionsFile.openRead(); 1639 XmlPullParser parser = Xml.newPullParser(); 1640 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1641 XmlUtils.nextElement(parser); 1642 if (parser.getEventType() != XmlPullParser.START_TAG) { 1643 Slog.e(LOG_TAG, "Unable to read restrictions file " 1644 + restrictionsFile.getBaseFile()); 1645 return restrictions; 1646 } 1647 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1648 readEntry(restrictions, values, parser); 1649 } 1650 } catch (IOException|XmlPullParserException e) { 1651 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1652 } finally { 1653 IoUtils.closeQuietly(fis); 1654 } 1655 return restrictions; 1656 } 1657 1658 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1659 XmlPullParser parser) throws XmlPullParserException, IOException { 1660 int type = parser.getEventType(); 1661 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1662 String key = parser.getAttributeValue(null, ATTR_KEY); 1663 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1664 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1665 if (multiple != null) { 1666 values.clear(); 1667 int count = Integer.parseInt(multiple); 1668 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1669 if (type == XmlPullParser.START_TAG 1670 && parser.getName().equals(TAG_VALUE)) { 1671 values.add(parser.nextText().trim()); 1672 count--; 1673 } 1674 } 1675 String [] valueStrings = new String[values.size()]; 1676 values.toArray(valueStrings); 1677 restrictions.putStringArray(key, valueStrings); 1678 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1679 restrictions.putBundle(key, readBundleEntry(parser, values)); 1680 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1681 final int outerDepth = parser.getDepth(); 1682 ArrayList<Bundle> bundleList = new ArrayList<>(); 1683 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1684 Bundle childBundle = readBundleEntry(parser, values); 1685 bundleList.add(childBundle); 1686 } 1687 restrictions.putParcelableArray(key, 1688 bundleList.toArray(new Bundle[bundleList.size()])); 1689 } else { 1690 String value = parser.nextText().trim(); 1691 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1692 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1693 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1694 restrictions.putInt(key, Integer.parseInt(value)); 1695 } else { 1696 restrictions.putString(key, value); 1697 } 1698 } 1699 } 1700 } 1701 1702 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1703 throws IOException, XmlPullParserException { 1704 Bundle childBundle = new Bundle(); 1705 final int outerDepth = parser.getDepth(); 1706 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1707 readEntry(childBundle, values, parser); 1708 } 1709 return childBundle; 1710 } 1711 1712 private void writeApplicationRestrictionsLocked(String packageName, 1713 Bundle restrictions, int userId) { 1714 AtomicFile restrictionsFile = new AtomicFile( 1715 new File(Environment.getUserSystemDirectory(userId), 1716 packageToRestrictionsFileName(packageName))); 1717 writeApplicationRestrictionsLocked(restrictions, restrictionsFile); 1718 } 1719 1720 @VisibleForTesting 1721 static void writeApplicationRestrictionsLocked(Bundle restrictions, 1722 AtomicFile restrictionsFile) { 1723 FileOutputStream fos = null; 1724 try { 1725 fos = restrictionsFile.startWrite(); 1726 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1727 1728 final XmlSerializer serializer = new FastXmlSerializer(); 1729 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1730 serializer.startDocument(null, true); 1731 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1732 1733 serializer.startTag(null, TAG_RESTRICTIONS); 1734 writeBundle(restrictions, serializer); 1735 serializer.endTag(null, TAG_RESTRICTIONS); 1736 1737 serializer.endDocument(); 1738 restrictionsFile.finishWrite(fos); 1739 } catch (Exception e) { 1740 restrictionsFile.failWrite(fos); 1741 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 1742 } 1743 } 1744 1745 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1746 throws IOException { 1747 for (String key : restrictions.keySet()) { 1748 Object value = restrictions.get(key); 1749 serializer.startTag(null, TAG_ENTRY); 1750 serializer.attribute(null, ATTR_KEY, key); 1751 1752 if (value instanceof Boolean) { 1753 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1754 serializer.text(value.toString()); 1755 } else if (value instanceof Integer) { 1756 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1757 serializer.text(value.toString()); 1758 } else if (value == null || value instanceof String) { 1759 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1760 serializer.text(value != null ? (String) value : ""); 1761 } else if (value instanceof Bundle) { 1762 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1763 writeBundle((Bundle) value, serializer); 1764 } else if (value instanceof Parcelable[]) { 1765 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 1766 Parcelable[] array = (Parcelable[]) value; 1767 for (Parcelable parcelable : array) { 1768 if (!(parcelable instanceof Bundle)) { 1769 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 1770 } 1771 serializer.startTag(null, TAG_ENTRY); 1772 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1773 writeBundle((Bundle) parcelable, serializer); 1774 serializer.endTag(null, TAG_ENTRY); 1775 } 1776 } else { 1777 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1778 String[] values = (String[]) value; 1779 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1780 for (String choice : values) { 1781 serializer.startTag(null, TAG_VALUE); 1782 serializer.text(choice != null ? choice : ""); 1783 serializer.endTag(null, TAG_VALUE); 1784 } 1785 } 1786 serializer.endTag(null, TAG_ENTRY); 1787 } 1788 } 1789 1790 @Override 1791 public int getUserSerialNumber(int userHandle) { 1792 synchronized (mPackagesLock) { 1793 if (!exists(userHandle)) return -1; 1794 return getUserInfoLocked(userHandle).serialNumber; 1795 } 1796 } 1797 1798 @Override 1799 public int getUserHandle(int userSerialNumber) { 1800 synchronized (mPackagesLock) { 1801 for (int userId : mUserIds) { 1802 UserInfo info = getUserInfoLocked(userId); 1803 if (info != null && info.serialNumber == userSerialNumber) return userId; 1804 } 1805 // Not found 1806 return -1; 1807 } 1808 } 1809 1810 @Override 1811 public long getUserCreationTime(int userHandle) { 1812 int callingUserId = UserHandle.getCallingUserId(); 1813 UserInfo userInfo = null; 1814 synchronized (mPackagesLock) { 1815 if (callingUserId == userHandle) { 1816 userInfo = getUserInfoLocked(userHandle); 1817 } else { 1818 UserInfo parent = getProfileParentLocked(userHandle); 1819 if (parent != null && parent.id == callingUserId) { 1820 userInfo = getUserInfoLocked(userHandle); 1821 } 1822 } 1823 } 1824 if (userInfo == null) { 1825 throw new SecurityException("userHandle can only be the calling user or a managed " 1826 + "profile associated with this user"); 1827 } 1828 return userInfo.creationTime; 1829 } 1830 1831 /** 1832 * Caches the list of user ids in an array, adjusting the array size when necessary. 1833 */ 1834 private void updateUserIdsLocked() { 1835 int num = 0; 1836 for (int i = 0; i < mUsers.size(); i++) { 1837 if (!mUsers.valueAt(i).partial) { 1838 num++; 1839 } 1840 } 1841 final int[] newUsers = new int[num]; 1842 int n = 0; 1843 for (int i = 0; i < mUsers.size(); i++) { 1844 if (!mUsers.valueAt(i).partial) { 1845 newUsers[n++] = mUsers.keyAt(i); 1846 } 1847 } 1848 mUserIds = newUsers; 1849 } 1850 1851 /** 1852 * Make a note of the last started time of a user and do some cleanup. 1853 * @param userId the user that was just foregrounded 1854 */ 1855 public void onUserForeground(int userId) { 1856 synchronized (mPackagesLock) { 1857 UserInfo user = mUsers.get(userId); 1858 long now = System.currentTimeMillis(); 1859 if (user == null || user.partial) { 1860 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1861 return; 1862 } 1863 if (now > EPOCH_PLUS_30_YEARS) { 1864 user.lastLoggedInTime = now; 1865 scheduleWriteUserLocked(user); 1866 } 1867 } 1868 } 1869 1870 /** 1871 * Returns the next available user id, filling in any holes in the ids. 1872 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1873 * for data and battery stats collection, or unexpected cross-talk. 1874 * @return 1875 */ 1876 private int getNextAvailableIdLocked() { 1877 synchronized (mPackagesLock) { 1878 int i = MIN_USER_ID; 1879 while (i < Integer.MAX_VALUE) { 1880 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1881 break; 1882 } 1883 i++; 1884 } 1885 return i; 1886 } 1887 } 1888 1889 private String packageToRestrictionsFileName(String packageName) { 1890 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1891 } 1892 1893 /** 1894 * Create new {@code /data/user/[id]} directory and sets default 1895 * permissions. 1896 */ 1897 public static void prepareUserDirectory(Context context, String volumeUuid, int userId) { 1898 final StorageManager storage = context.getSystemService(StorageManager.class); 1899 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 1900 storage.createNewUserDir(userId, userDir); 1901 } 1902 1903 /** 1904 * Enforce that serial number stored in user directory inode matches the 1905 * given expected value. Gracefully sets the serial number if currently 1906 * undefined. 1907 * 1908 * @throws IOException when problem extracting serial number, or serial 1909 * number is mismatched. 1910 */ 1911 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 1912 final int foundSerial = getSerialNumber(file); 1913 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 1914 1915 if (foundSerial == -1) { 1916 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 1917 try { 1918 setSerialNumber(file, serialNumber); 1919 } catch (IOException e) { 1920 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 1921 } 1922 1923 } else if (foundSerial != serialNumber) { 1924 throw new IOException("Found serial number " + foundSerial 1925 + " doesn't match expected " + serialNumber); 1926 } 1927 } 1928 1929 /** 1930 * Set serial number stored in user directory inode. 1931 * 1932 * @throws IOException if serial number was already set 1933 */ 1934 private static void setSerialNumber(File file, int serialNumber) 1935 throws IOException { 1936 try { 1937 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 1938 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 1939 } catch (ErrnoException e) { 1940 throw e.rethrowAsIOException(); 1941 } 1942 } 1943 1944 /** 1945 * Return serial number stored in user directory inode. 1946 * 1947 * @return parsed serial number, or -1 if not set 1948 */ 1949 private static int getSerialNumber(File file) throws IOException { 1950 try { 1951 final byte[] buf = new byte[256]; 1952 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 1953 final String serial = new String(buf, 0, len); 1954 try { 1955 return Integer.parseInt(serial); 1956 } catch (NumberFormatException e) { 1957 throw new IOException("Bad serial number: " + serial); 1958 } 1959 } catch (ErrnoException e) { 1960 if (e.errno == OsConstants.ENODATA) { 1961 return -1; 1962 } else { 1963 throw e.rethrowAsIOException(); 1964 } 1965 } 1966 } 1967 1968 @Override 1969 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1970 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1971 != PackageManager.PERMISSION_GRANTED) { 1972 pw.println("Permission Denial: can't dump UserManager from from pid=" 1973 + Binder.getCallingPid() 1974 + ", uid=" + Binder.getCallingUid() 1975 + " without permission " 1976 + android.Manifest.permission.DUMP); 1977 return; 1978 } 1979 1980 long now = System.currentTimeMillis(); 1981 StringBuilder sb = new StringBuilder(); 1982 synchronized (mPackagesLock) { 1983 pw.println("Users:"); 1984 for (int i = 0; i < mUsers.size(); i++) { 1985 UserInfo user = mUsers.valueAt(i); 1986 if (user == null) continue; 1987 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1988 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1989 if (user.partial) pw.print(" <partial>"); 1990 pw.println(); 1991 pw.print(" Created: "); 1992 if (user.creationTime == 0) { 1993 pw.println("<unknown>"); 1994 } else { 1995 sb.setLength(0); 1996 TimeUtils.formatDuration(now - user.creationTime, sb); 1997 sb.append(" ago"); 1998 pw.println(sb); 1999 } 2000 pw.print(" Last logged in: "); 2001 if (user.lastLoggedInTime == 0) { 2002 pw.println("<unknown>"); 2003 } else { 2004 sb.setLength(0); 2005 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2006 sb.append(" ago"); 2007 pw.println(sb); 2008 } 2009 } 2010 } 2011 } 2012 2013 final class MainHandler extends Handler { 2014 2015 @Override 2016 public void handleMessage(Message msg) { 2017 switch (msg.what) { 2018 case WRITE_USER_MSG: 2019 removeMessages(WRITE_USER_MSG, msg.obj); 2020 synchronized (mPackagesLock) { 2021 int userId = ((UserInfo) msg.obj).id; 2022 UserInfo userInfo = mUsers.get(userId); 2023 if (userInfo != null) { 2024 writeUserLocked(userInfo); 2025 } 2026 } 2027 } 2028 } 2029 } 2030 2031 /** 2032 * @param userId 2033 * @return whether the user has been initialized yet 2034 */ 2035 boolean isInitialized(int userId) { 2036 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2037 } 2038} 2039