UserManagerService.java revision d4b2604109c9239e14b5c96678d751bf05ba4657
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 checkManageUsersPermission("setUserRestriction"); 533 synchronized (mPackagesLock) { 534 if (!SYSTEM_CONTROLLED_RESTRICTIONS.contains(key)) { 535 Bundle restrictions = getUserRestrictions(userId); 536 restrictions.putBoolean(key, value); 537 setUserRestrictionsInternalLocked(restrictions, userId); 538 } 539 } 540 } 541 542 @Override 543 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 544 checkSystemOrRoot("setSystemControlledUserRestriction"); 545 synchronized (mPackagesLock) { 546 Bundle restrictions = getUserRestrictions(userId); 547 restrictions.putBoolean(key, value); 548 setUserRestrictionsInternalLocked(restrictions, userId); 549 } 550 } 551 552 @Override 553 public void setUserRestrictions(Bundle restrictions, int userId) { 554 checkManageUsersPermission("setUserRestrictions"); 555 if (restrictions == null) return; 556 557 synchronized (mPackagesLock) { 558 final Bundle oldUserRestrictions = mUserRestrictions.get(userId); 559 // Restore the original state of system controlled restrictions from oldUserRestrictions 560 for (String key : SYSTEM_CONTROLLED_RESTRICTIONS) { 561 restrictions.remove(key); 562 if (oldUserRestrictions.containsKey(key)) { 563 restrictions.putBoolean(key, oldUserRestrictions.getBoolean(key)); 564 } 565 } 566 setUserRestrictionsInternalLocked(restrictions, userId); 567 } 568 } 569 570 private void setUserRestrictionsInternalLocked(Bundle restrictions, int userId) { 571 final Bundle userRestrictions = mUserRestrictions.get(userId); 572 userRestrictions.clear(); 573 userRestrictions.putAll(restrictions); 574 long token = Binder.clearCallingIdentity(); 575 try { 576 mAppOpsService.setUserRestrictions(userRestrictions, userId); 577 } catch (RemoteException e) { 578 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 579 } finally { 580 Binder.restoreCallingIdentity(token); 581 } 582 scheduleWriteUserLocked(mUsers.get(userId)); 583 } 584 585 /** 586 * Check if we've hit the limit of how many users can be created. 587 */ 588 private boolean isUserLimitReachedLocked() { 589 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 590 } 591 592 @Override 593 public boolean canAddMoreManagedProfiles() { 594 checkManageUsersPermission("check if more managed profiles can be added."); 595 if (ActivityManager.isLowRamDeviceStatic()) { 596 return false; 597 } 598 if (!mContext.getPackageManager().hasSystemFeature( 599 PackageManager.FEATURE_MANAGED_USERS)) { 600 return false; 601 } 602 synchronized(mPackagesLock) { 603 // Limit number of managed profiles that can be created 604 if (numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 605 >= MAX_MANAGED_PROFILES) { 606 return false; 607 } 608 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 609 // We allow creating a managed profile in the special case where there is only one user. 610 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 611 } 612 } 613 614 private int getAliveUsersExcludingGuestsCountLocked() { 615 int aliveUserCount = 0; 616 final int totalUserCount = mUsers.size(); 617 // Skip over users being removed 618 for (int i = 0; i < totalUserCount; i++) { 619 UserInfo user = mUsers.valueAt(i); 620 if (!mRemovingUserIds.get(user.id) 621 && !user.isGuest() && !user.partial) { 622 aliveUserCount++; 623 } 624 } 625 return aliveUserCount; 626 } 627 628 /** 629 * Enforces that only the system UID or root's UID or apps that have the 630 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 631 * permission can make certain calls to the UserManager. 632 * 633 * @param message used as message if SecurityException is thrown 634 * @throws SecurityException if the caller is not system or root 635 */ 636 private static final void checkManageUsersPermission(String message) { 637 final int uid = Binder.getCallingUid(); 638 if (uid != Process.SYSTEM_UID && uid != 0 639 && ActivityManager.checkComponentPermission( 640 android.Manifest.permission.MANAGE_USERS, 641 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 642 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 643 } 644 } 645 646 private static void checkSystemOrRoot(String message) { 647 final int uid = Binder.getCallingUid(); 648 if (uid != Process.SYSTEM_UID && uid != 0) { 649 throw new SecurityException("Only system may call: " + message); 650 } 651 } 652 653 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 654 try { 655 File dir = new File(mUsersDir, Integer.toString(info.id)); 656 File file = new File(dir, USER_PHOTO_FILENAME); 657 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 658 if (!dir.exists()) { 659 dir.mkdir(); 660 FileUtils.setPermissions( 661 dir.getPath(), 662 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 663 -1, -1); 664 } 665 FileOutputStream os; 666 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 667 && tmp.renameTo(file)) { 668 info.iconPath = file.getAbsolutePath(); 669 } 670 try { 671 os.close(); 672 } catch (IOException ioe) { 673 // What the ... ! 674 } 675 tmp.delete(); 676 } catch (FileNotFoundException e) { 677 Slog.w(LOG_TAG, "Error setting photo for user ", e); 678 } 679 } 680 681 /** 682 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 683 * cache it elsewhere. 684 * @return the array of user ids. 685 */ 686 public int[] getUserIds() { 687 synchronized (mPackagesLock) { 688 return mUserIds; 689 } 690 } 691 692 int[] getUserIdsLPr() { 693 return mUserIds; 694 } 695 696 private void readUserListLocked() { 697 if (!mUserListFile.exists()) { 698 fallbackToSingleUserLocked(); 699 return; 700 } 701 FileInputStream fis = null; 702 AtomicFile userListFile = new AtomicFile(mUserListFile); 703 try { 704 fis = userListFile.openRead(); 705 XmlPullParser parser = Xml.newPullParser(); 706 parser.setInput(fis, StandardCharsets.UTF_8.name()); 707 int type; 708 while ((type = parser.next()) != XmlPullParser.START_TAG 709 && type != XmlPullParser.END_DOCUMENT) { 710 ; 711 } 712 713 if (type != XmlPullParser.START_TAG) { 714 Slog.e(LOG_TAG, "Unable to read user list"); 715 fallbackToSingleUserLocked(); 716 return; 717 } 718 719 mNextSerialNumber = -1; 720 if (parser.getName().equals(TAG_USERS)) { 721 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 722 if (lastSerialNumber != null) { 723 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 724 } 725 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 726 if (versionNumber != null) { 727 mUserVersion = Integer.parseInt(versionNumber); 728 } 729 } 730 731 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 732 if (type == XmlPullParser.START_TAG) { 733 final String name = parser.getName(); 734 if (name.equals(TAG_USER)) { 735 String id = parser.getAttributeValue(null, ATTR_ID); 736 UserInfo user = readUserLocked(Integer.parseInt(id)); 737 738 if (user != null) { 739 mUsers.put(user.id, user); 740 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 741 mNextSerialNumber = user.id + 1; 742 } 743 } 744 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 745 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 746 && type != XmlPullParser.END_TAG) { 747 if (type == XmlPullParser.START_TAG) { 748 if (parser.getName().equals(TAG_RESTRICTIONS)) { 749 readRestrictionsLocked(parser, mGuestRestrictions); 750 } 751 break; 752 } 753 } 754 } 755 } 756 } 757 updateUserIdsLocked(); 758 upgradeIfNecessaryLocked(); 759 } catch (IOException ioe) { 760 fallbackToSingleUserLocked(); 761 } catch (XmlPullParserException pe) { 762 fallbackToSingleUserLocked(); 763 } finally { 764 if (fis != null) { 765 try { 766 fis.close(); 767 } catch (IOException e) { 768 } 769 } 770 } 771 } 772 773 /** 774 * Upgrade steps between versions, either for fixing bugs or changing the data format. 775 */ 776 private void upgradeIfNecessaryLocked() { 777 int userVersion = mUserVersion; 778 if (userVersion < 1) { 779 // Assign a proper name for the owner, if not initialized correctly before 780 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 781 if ("Primary".equals(user.name)) { 782 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 783 scheduleWriteUserLocked(user); 784 } 785 userVersion = 1; 786 } 787 788 if (userVersion < 2) { 789 // Owner should be marked as initialized 790 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 791 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 792 user.flags |= UserInfo.FLAG_INITIALIZED; 793 scheduleWriteUserLocked(user); 794 } 795 userVersion = 2; 796 } 797 798 799 if (userVersion < 4) { 800 userVersion = 4; 801 } 802 803 if (userVersion < 5) { 804 initDefaultGuestRestrictions(); 805 userVersion = 5; 806 } 807 808 if (userVersion < USER_VERSION) { 809 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 810 + USER_VERSION); 811 } else { 812 mUserVersion = userVersion; 813 writeUserListLocked(); 814 } 815 } 816 817 private void fallbackToSingleUserLocked() { 818 // Create the primary user 819 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 820 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 821 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 822 mUsers.put(0, primary); 823 mNextSerialNumber = MIN_USER_ID; 824 mUserVersion = USER_VERSION; 825 826 Bundle restrictions = new Bundle(); 827 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 828 829 updateUserIdsLocked(); 830 initDefaultGuestRestrictions(); 831 832 writeUserListLocked(); 833 writeUserLocked(primary); 834 } 835 836 private void scheduleWriteUserLocked(UserInfo userInfo) { 837 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 838 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 839 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 840 } 841 } 842 843 /* 844 * Writes the user file in this format: 845 * 846 * <user flags="20039023" id="0"> 847 * <name>Primary</name> 848 * </user> 849 */ 850 private void writeUserLocked(UserInfo userInfo) { 851 FileOutputStream fos = null; 852 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 853 try { 854 fos = userFile.startWrite(); 855 final BufferedOutputStream bos = new BufferedOutputStream(fos); 856 857 // XmlSerializer serializer = XmlUtils.serializerInstance(); 858 final XmlSerializer serializer = new FastXmlSerializer(); 859 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 860 serializer.startDocument(null, true); 861 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 862 863 serializer.startTag(null, TAG_USER); 864 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 865 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 866 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 867 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 868 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 869 Long.toString(userInfo.lastLoggedInTime)); 870 if (userInfo.iconPath != null) { 871 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 872 } 873 if (userInfo.partial) { 874 serializer.attribute(null, ATTR_PARTIAL, "true"); 875 } 876 if (userInfo.guestToRemove) { 877 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 878 } 879 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 880 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 881 Integer.toString(userInfo.profileGroupId)); 882 } 883 884 serializer.startTag(null, TAG_NAME); 885 serializer.text(userInfo.name); 886 serializer.endTag(null, TAG_NAME); 887 Bundle restrictions = mUserRestrictions.get(userInfo.id); 888 if (restrictions != null) { 889 writeRestrictionsLocked(serializer, restrictions); 890 } 891 serializer.endTag(null, TAG_USER); 892 893 serializer.endDocument(); 894 userFile.finishWrite(fos); 895 } catch (Exception ioe) { 896 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 897 userFile.failWrite(fos); 898 } 899 } 900 901 /* 902 * Writes the user list file in this format: 903 * 904 * <users nextSerialNumber="3"> 905 * <user id="0"></user> 906 * <user id="2"></user> 907 * </users> 908 */ 909 private void writeUserListLocked() { 910 FileOutputStream fos = null; 911 AtomicFile userListFile = new AtomicFile(mUserListFile); 912 try { 913 fos = userListFile.startWrite(); 914 final BufferedOutputStream bos = new BufferedOutputStream(fos); 915 916 // XmlSerializer serializer = XmlUtils.serializerInstance(); 917 final XmlSerializer serializer = new FastXmlSerializer(); 918 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 919 serializer.startDocument(null, true); 920 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 921 922 serializer.startTag(null, TAG_USERS); 923 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 924 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 925 926 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 927 writeRestrictionsLocked(serializer, mGuestRestrictions); 928 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 929 for (int i = 0; i < mUsers.size(); i++) { 930 UserInfo user = mUsers.valueAt(i); 931 serializer.startTag(null, TAG_USER); 932 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 933 serializer.endTag(null, TAG_USER); 934 } 935 936 serializer.endTag(null, TAG_USERS); 937 938 serializer.endDocument(); 939 userListFile.finishWrite(fos); 940 } catch (Exception e) { 941 userListFile.failWrite(fos); 942 Slog.e(LOG_TAG, "Error writing user list"); 943 } 944 } 945 946 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 947 throws IOException { 948 serializer.startTag(null, TAG_RESTRICTIONS); 949 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 950 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 951 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 952 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 953 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 954 writeBoolean(serializer, restrictions, 955 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 956 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 957 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 958 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 959 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 960 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 961 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 962 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 963 writeBoolean(serializer, restrictions, UserManager.DISALLOW_NETWORK_RESET); 964 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 965 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 966 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 967 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 968 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 969 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 970 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 971 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 972 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 973 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 974 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 975 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FUN); 976 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 977 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 978 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 979 writeBoolean(serializer, restrictions, UserManager.DISALLOW_WALLPAPER); 980 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SAFE_BOOT); 981 writeBoolean(serializer, restrictions, UserManager.ALLOW_PARENT_PROFILE_APP_LINKING); 982 serializer.endTag(null, TAG_RESTRICTIONS); 983 } 984 985 private UserInfo readUserLocked(int id) { 986 int flags = 0; 987 int serialNumber = id; 988 String name = null; 989 String iconPath = null; 990 long creationTime = 0L; 991 long lastLoggedInTime = 0L; 992 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 993 boolean partial = false; 994 boolean guestToRemove = false; 995 Bundle restrictions = new Bundle(); 996 997 FileInputStream fis = null; 998 try { 999 AtomicFile userFile = 1000 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1001 fis = userFile.openRead(); 1002 XmlPullParser parser = Xml.newPullParser(); 1003 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1004 int type; 1005 while ((type = parser.next()) != XmlPullParser.START_TAG 1006 && type != XmlPullParser.END_DOCUMENT) { 1007 ; 1008 } 1009 1010 if (type != XmlPullParser.START_TAG) { 1011 Slog.e(LOG_TAG, "Unable to read user " + id); 1012 return null; 1013 } 1014 1015 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1016 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1017 if (storedId != id) { 1018 Slog.e(LOG_TAG, "User id does not match the file name"); 1019 return null; 1020 } 1021 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1022 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1023 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1024 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1025 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1026 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1027 UserInfo.NO_PROFILE_GROUP_ID); 1028 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1029 if ("true".equals(valueString)) { 1030 partial = true; 1031 } 1032 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1033 if ("true".equals(valueString)) { 1034 guestToRemove = true; 1035 } 1036 1037 int outerDepth = parser.getDepth(); 1038 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1039 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1040 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1041 continue; 1042 } 1043 String tag = parser.getName(); 1044 if (TAG_NAME.equals(tag)) { 1045 type = parser.next(); 1046 if (type == XmlPullParser.TEXT) { 1047 name = parser.getText(); 1048 } 1049 } else if (TAG_RESTRICTIONS.equals(tag)) { 1050 readRestrictionsLocked(parser, restrictions); 1051 } 1052 } 1053 } 1054 1055 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1056 userInfo.serialNumber = serialNumber; 1057 userInfo.creationTime = creationTime; 1058 userInfo.lastLoggedInTime = lastLoggedInTime; 1059 userInfo.partial = partial; 1060 userInfo.guestToRemove = guestToRemove; 1061 userInfo.profileGroupId = profileGroupId; 1062 mUserRestrictions.append(id, restrictions); 1063 return userInfo; 1064 1065 } catch (IOException ioe) { 1066 } catch (XmlPullParserException pe) { 1067 } finally { 1068 if (fis != null) { 1069 try { 1070 fis.close(); 1071 } catch (IOException e) { 1072 } 1073 } 1074 } 1075 return null; 1076 } 1077 1078 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1079 throws IOException { 1080 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1081 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1082 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1083 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1084 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1085 readBoolean(parser, restrictions, 1086 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1087 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1088 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1089 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1090 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1091 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1092 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1093 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1094 readBoolean(parser, restrictions, UserManager.DISALLOW_NETWORK_RESET); 1095 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1096 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1097 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1098 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1099 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1100 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1101 readBoolean(parser, restrictions, 1102 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1103 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1104 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1105 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1106 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1107 readBoolean(parser, restrictions, UserManager.DISALLOW_FUN); 1108 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1109 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1110 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1111 readBoolean(parser, restrictions, UserManager.DISALLOW_WALLPAPER); 1112 readBoolean(parser, restrictions, UserManager.DISALLOW_SAFE_BOOT); 1113 readBoolean(parser, restrictions, UserManager.ALLOW_PARENT_PROFILE_APP_LINKING); 1114 } 1115 1116 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1117 String restrictionKey) { 1118 String value = parser.getAttributeValue(null, restrictionKey); 1119 if (value != null) { 1120 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1121 } 1122 } 1123 1124 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1125 throws IOException { 1126 if (restrictions.containsKey(restrictionKey)) { 1127 xml.attribute(null, restrictionKey, 1128 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1129 } 1130 } 1131 1132 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1133 String valueString = parser.getAttributeValue(null, attr); 1134 if (valueString == null) return defaultValue; 1135 try { 1136 return Integer.parseInt(valueString); 1137 } catch (NumberFormatException nfe) { 1138 return defaultValue; 1139 } 1140 } 1141 1142 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1143 String valueString = parser.getAttributeValue(null, attr); 1144 if (valueString == null) return defaultValue; 1145 try { 1146 return Long.parseLong(valueString); 1147 } catch (NumberFormatException nfe) { 1148 return defaultValue; 1149 } 1150 } 1151 1152 private boolean isPackageInstalled(String pkg, int userId) { 1153 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1154 PackageManager.GET_UNINSTALLED_PACKAGES, 1155 userId); 1156 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1157 return false; 1158 } 1159 return true; 1160 } 1161 1162 /** 1163 * Removes all the restrictions files (res_<packagename>) for a given user. 1164 * Does not do any permissions checking. 1165 */ 1166 private void cleanAppRestrictions(int userId) { 1167 synchronized (mPackagesLock) { 1168 File dir = Environment.getUserSystemDirectory(userId); 1169 String[] files = dir.list(); 1170 if (files == null) return; 1171 for (String fileName : files) { 1172 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1173 File resFile = new File(dir, fileName); 1174 if (resFile.exists()) { 1175 resFile.delete(); 1176 } 1177 } 1178 } 1179 } 1180 } 1181 1182 /** 1183 * Removes the app restrictions file for a specific package and user id, if it exists. 1184 */ 1185 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1186 synchronized (mPackagesLock) { 1187 File dir = Environment.getUserSystemDirectory(userId); 1188 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1189 if (resFile.exists()) { 1190 resFile.delete(); 1191 } 1192 } 1193 } 1194 1195 @Override 1196 public UserInfo createProfileForUser(String name, int flags, int userId) { 1197 checkManageUsersPermission("Only the system can create users"); 1198 if (userId != UserHandle.USER_OWNER) { 1199 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1200 return null; 1201 } 1202 return createUserInternal(name, flags, userId); 1203 } 1204 1205 @Override 1206 public UserInfo createUser(String name, int flags) { 1207 checkManageUsersPermission("Only the system can create users"); 1208 return createUserInternal(name, flags, UserHandle.USER_NULL); 1209 } 1210 1211 private UserInfo createUserInternal(String name, int flags, int parentId) { 1212 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1213 UserManager.DISALLOW_ADD_USER, false)) { 1214 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1215 return null; 1216 } 1217 if (ActivityManager.isLowRamDeviceStatic()) { 1218 return null; 1219 } 1220 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1221 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1222 final long ident = Binder.clearCallingIdentity(); 1223 UserInfo userInfo = null; 1224 final int userId; 1225 try { 1226 synchronized (mInstallLock) { 1227 synchronized (mPackagesLock) { 1228 UserInfo parent = null; 1229 if (parentId != UserHandle.USER_NULL) { 1230 parent = getUserInfoLocked(parentId); 1231 if (parent == null) return null; 1232 } 1233 if (isManagedProfile && !canAddMoreManagedProfiles()) { 1234 return null; 1235 } 1236 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1237 // If we're not adding a guest user or a managed profile and the limit has 1238 // been reached, cannot add a user. 1239 return null; 1240 } 1241 // If we're adding a guest and there already exists one, bail. 1242 if (isGuest && findCurrentGuestUserLocked() != null) { 1243 return null; 1244 } 1245 userId = getNextAvailableIdLocked(); 1246 userInfo = new UserInfo(userId, name, null, flags); 1247 userInfo.serialNumber = mNextSerialNumber++; 1248 long now = System.currentTimeMillis(); 1249 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1250 userInfo.partial = true; 1251 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1252 mUsers.put(userId, userInfo); 1253 writeUserListLocked(); 1254 if (parent != null) { 1255 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1256 parent.profileGroupId = parent.id; 1257 scheduleWriteUserLocked(parent); 1258 } 1259 userInfo.profileGroupId = parent.profileGroupId; 1260 } 1261 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1262 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1263 final String volumeUuid = vol.getFsUuid(); 1264 try { 1265 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1266 userId); 1267 prepareUserDirectory(userDir); 1268 enforceSerialNumber(userDir, userInfo.serialNumber); 1269 } catch (IOException e) { 1270 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1271 } 1272 } 1273 mPm.createNewUserLILPw(userId); 1274 userInfo.partial = false; 1275 scheduleWriteUserLocked(userInfo); 1276 updateUserIdsLocked(); 1277 Bundle restrictions = new Bundle(); 1278 mUserRestrictions.append(userId, restrictions); 1279 } 1280 } 1281 mPm.newUserCreated(userId); 1282 if (userInfo != null) { 1283 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1284 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1285 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1286 android.Manifest.permission.MANAGE_USERS); 1287 } 1288 } finally { 1289 Binder.restoreCallingIdentity(ident); 1290 } 1291 return userInfo; 1292 } 1293 1294 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1295 int count = 0; 1296 for (int i = mUsers.size() - 1; i >= 0; i--) { 1297 UserInfo user = mUsers.valueAt(i); 1298 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1299 if ((user.flags & flags) != 0) { 1300 count++; 1301 } 1302 } 1303 } 1304 return count; 1305 } 1306 1307 /** 1308 * Find the current guest user. If the Guest user is partial, 1309 * then do not include it in the results as it is about to die. 1310 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1311 * the special handling of Guests being removed. 1312 */ 1313 private UserInfo findCurrentGuestUserLocked() { 1314 final int size = mUsers.size(); 1315 for (int i = 0; i < size; i++) { 1316 final UserInfo user = mUsers.valueAt(i); 1317 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1318 return user; 1319 } 1320 } 1321 return null; 1322 } 1323 1324 /** 1325 * Mark this guest user for deletion to allow us to create another guest 1326 * and switch to that user before actually removing this guest. 1327 * @param userHandle the userid of the current guest 1328 * @return whether the user could be marked for deletion 1329 */ 1330 public boolean markGuestForDeletion(int userHandle) { 1331 checkManageUsersPermission("Only the system can remove users"); 1332 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1333 UserManager.DISALLOW_REMOVE_USER, false)) { 1334 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1335 return false; 1336 } 1337 1338 long ident = Binder.clearCallingIdentity(); 1339 try { 1340 final UserInfo user; 1341 synchronized (mPackagesLock) { 1342 user = mUsers.get(userHandle); 1343 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1344 return false; 1345 } 1346 if (!user.isGuest()) { 1347 return false; 1348 } 1349 // We set this to a guest user that is to be removed. This is a temporary state 1350 // where we are allowed to add new Guest users, even if this one is still not 1351 // removed. This user will still show up in getUserInfo() calls. 1352 // If we don't get around to removing this Guest user, it will be purged on next 1353 // startup. 1354 user.guestToRemove = true; 1355 // Mark it as disabled, so that it isn't returned any more when 1356 // profiles are queried. 1357 user.flags |= UserInfo.FLAG_DISABLED; 1358 writeUserLocked(user); 1359 } 1360 } finally { 1361 Binder.restoreCallingIdentity(ident); 1362 } 1363 return true; 1364 } 1365 1366 /** 1367 * Removes a user and all data directories created for that user. This method should be called 1368 * after the user's processes have been terminated. 1369 * @param userHandle the user's id 1370 */ 1371 public boolean removeUser(int userHandle) { 1372 checkManageUsersPermission("Only the system can remove users"); 1373 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1374 UserManager.DISALLOW_REMOVE_USER, false)) { 1375 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1376 return false; 1377 } 1378 1379 long ident = Binder.clearCallingIdentity(); 1380 try { 1381 final UserInfo user; 1382 synchronized (mPackagesLock) { 1383 user = mUsers.get(userHandle); 1384 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1385 return false; 1386 } 1387 1388 // We remember deleted user IDs to prevent them from being 1389 // reused during the current boot; they can still be reused 1390 // after a reboot. 1391 mRemovingUserIds.put(userHandle, true); 1392 1393 try { 1394 mAppOpsService.removeUser(userHandle); 1395 } catch (RemoteException e) { 1396 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1397 } 1398 // Set this to a partially created user, so that the user will be purged 1399 // on next startup, in case the runtime stops now before stopping and 1400 // removing the user completely. 1401 user.partial = true; 1402 // Mark it as disabled, so that it isn't returned any more when 1403 // profiles are queried. 1404 user.flags |= UserInfo.FLAG_DISABLED; 1405 writeUserLocked(user); 1406 } 1407 1408 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1409 && user.isManagedProfile()) { 1410 // Send broadcast to notify system that the user removed was a 1411 // managed user. 1412 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1413 } 1414 1415 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1416 int res; 1417 try { 1418 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1419 new IStopUserCallback.Stub() { 1420 @Override 1421 public void userStopped(int userId) { 1422 finishRemoveUser(userId); 1423 } 1424 @Override 1425 public void userStopAborted(int userId) { 1426 } 1427 }); 1428 } catch (RemoteException e) { 1429 return false; 1430 } 1431 return res == ActivityManager.USER_OP_SUCCESS; 1432 } finally { 1433 Binder.restoreCallingIdentity(ident); 1434 } 1435 } 1436 1437 void finishRemoveUser(final int userHandle) { 1438 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1439 // Let other services shutdown any activity and clean up their state before completely 1440 // wiping the user's system directory and removing from the user list 1441 long ident = Binder.clearCallingIdentity(); 1442 try { 1443 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1444 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1445 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1446 android.Manifest.permission.MANAGE_USERS, 1447 1448 new BroadcastReceiver() { 1449 @Override 1450 public void onReceive(Context context, Intent intent) { 1451 if (DBG) { 1452 Slog.i(LOG_TAG, 1453 "USER_REMOVED broadcast sent, cleaning up user data " 1454 + userHandle); 1455 } 1456 new Thread() { 1457 public void run() { 1458 synchronized (mInstallLock) { 1459 synchronized (mPackagesLock) { 1460 removeUserStateLocked(userHandle); 1461 } 1462 } 1463 } 1464 }.start(); 1465 } 1466 }, 1467 1468 null, Activity.RESULT_OK, null, null); 1469 } finally { 1470 Binder.restoreCallingIdentity(ident); 1471 } 1472 } 1473 1474 private void removeUserStateLocked(final int userHandle) { 1475 // Cleanup package manager settings 1476 mPm.cleanUpUserLILPw(this, userHandle); 1477 1478 // Remove this user from the list 1479 mUsers.remove(userHandle); 1480 // Remove user file 1481 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1482 userFile.delete(); 1483 // Update the user list 1484 writeUserListLocked(); 1485 updateUserIdsLocked(); 1486 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1487 } 1488 1489 private void removeDirectoryRecursive(File parent) { 1490 if (parent.isDirectory()) { 1491 String[] files = parent.list(); 1492 for (String filename : files) { 1493 File child = new File(parent, filename); 1494 removeDirectoryRecursive(child); 1495 } 1496 } 1497 parent.delete(); 1498 } 1499 1500 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1501 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1502 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1503 Intent.FLAG_RECEIVER_FOREGROUND); 1504 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1505 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1506 } 1507 1508 @Override 1509 public Bundle getApplicationRestrictions(String packageName) { 1510 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1511 } 1512 1513 @Override 1514 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1515 if (UserHandle.getCallingUserId() != userId 1516 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1517 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1518 } 1519 synchronized (mPackagesLock) { 1520 // Read the restrictions from XML 1521 return readApplicationRestrictionsLocked(packageName, userId); 1522 } 1523 } 1524 1525 @Override 1526 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1527 int userId) { 1528 if (UserHandle.getCallingUserId() != userId 1529 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1530 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1531 } 1532 synchronized (mPackagesLock) { 1533 if (restrictions == null || restrictions.isEmpty()) { 1534 cleanAppRestrictionsForPackage(packageName, userId); 1535 } else { 1536 // Write the restrictions to XML 1537 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1538 } 1539 } 1540 1541 if (isPackageInstalled(packageName, userId)) { 1542 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1543 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1544 changeIntent.setPackage(packageName); 1545 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1546 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1547 } 1548 } 1549 1550 @Override 1551 public void removeRestrictions() { 1552 checkManageUsersPermission("Only system can remove restrictions"); 1553 final int userHandle = UserHandle.getCallingUserId(); 1554 removeRestrictionsForUser(userHandle, true); 1555 } 1556 1557 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1558 synchronized (mPackagesLock) { 1559 // Remove all user restrictions 1560 setUserRestrictions(new Bundle(), userHandle); 1561 // Remove any app restrictions 1562 cleanAppRestrictions(userHandle); 1563 } 1564 if (unhideApps) { 1565 unhideAllInstalledAppsForUser(userHandle); 1566 } 1567 } 1568 1569 private void unhideAllInstalledAppsForUser(final int userHandle) { 1570 mHandler.post(new Runnable() { 1571 @Override 1572 public void run() { 1573 List<ApplicationInfo> apps = 1574 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1575 userHandle).getList(); 1576 final long ident = Binder.clearCallingIdentity(); 1577 try { 1578 for (ApplicationInfo appInfo : apps) { 1579 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1580 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1581 != 0) { 1582 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1583 userHandle); 1584 } 1585 } 1586 } finally { 1587 Binder.restoreCallingIdentity(ident); 1588 } 1589 } 1590 }); 1591 } 1592 private int getUidForPackage(String packageName) { 1593 long ident = Binder.clearCallingIdentity(); 1594 try { 1595 return mContext.getPackageManager().getApplicationInfo(packageName, 1596 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1597 } catch (NameNotFoundException nnfe) { 1598 return -1; 1599 } finally { 1600 Binder.restoreCallingIdentity(ident); 1601 } 1602 } 1603 1604 private Bundle readApplicationRestrictionsLocked(String packageName, 1605 int userId) { 1606 AtomicFile restrictionsFile = 1607 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1608 packageToRestrictionsFileName(packageName))); 1609 return readApplicationRestrictionsLocked(restrictionsFile); 1610 } 1611 1612 @VisibleForTesting 1613 static Bundle readApplicationRestrictionsLocked(AtomicFile restrictionsFile) { 1614 final Bundle restrictions = new Bundle(); 1615 final ArrayList<String> values = new ArrayList<>(); 1616 if (!restrictionsFile.getBaseFile().exists()) { 1617 return restrictions; 1618 } 1619 1620 FileInputStream fis = null; 1621 try { 1622 fis = restrictionsFile.openRead(); 1623 XmlPullParser parser = Xml.newPullParser(); 1624 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1625 XmlUtils.nextElement(parser); 1626 if (parser.getEventType() != XmlPullParser.START_TAG) { 1627 Slog.e(LOG_TAG, "Unable to read restrictions file " 1628 + restrictionsFile.getBaseFile()); 1629 return restrictions; 1630 } 1631 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1632 readEntry(restrictions, values, parser); 1633 } 1634 } catch (IOException|XmlPullParserException e) { 1635 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1636 } finally { 1637 IoUtils.closeQuietly(fis); 1638 } 1639 return restrictions; 1640 } 1641 1642 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1643 XmlPullParser parser) throws XmlPullParserException, IOException { 1644 int type = parser.getEventType(); 1645 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1646 String key = parser.getAttributeValue(null, ATTR_KEY); 1647 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1648 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1649 if (multiple != null) { 1650 values.clear(); 1651 int count = Integer.parseInt(multiple); 1652 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1653 if (type == XmlPullParser.START_TAG 1654 && parser.getName().equals(TAG_VALUE)) { 1655 values.add(parser.nextText().trim()); 1656 count--; 1657 } 1658 } 1659 String [] valueStrings = new String[values.size()]; 1660 values.toArray(valueStrings); 1661 restrictions.putStringArray(key, valueStrings); 1662 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1663 restrictions.putBundle(key, readBundleEntry(parser, values)); 1664 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1665 final int outerDepth = parser.getDepth(); 1666 ArrayList<Bundle> bundleList = new ArrayList<>(); 1667 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1668 Bundle childBundle = readBundleEntry(parser, values); 1669 bundleList.add(childBundle); 1670 } 1671 restrictions.putParcelableArray(key, 1672 bundleList.toArray(new Bundle[bundleList.size()])); 1673 } else { 1674 String value = parser.nextText().trim(); 1675 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1676 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1677 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1678 restrictions.putInt(key, Integer.parseInt(value)); 1679 } else { 1680 restrictions.putString(key, value); 1681 } 1682 } 1683 } 1684 } 1685 1686 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1687 throws IOException, XmlPullParserException { 1688 Bundle childBundle = new Bundle(); 1689 final int outerDepth = parser.getDepth(); 1690 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1691 readEntry(childBundle, values, parser); 1692 } 1693 return childBundle; 1694 } 1695 1696 private void writeApplicationRestrictionsLocked(String packageName, 1697 Bundle restrictions, int userId) { 1698 AtomicFile restrictionsFile = new AtomicFile( 1699 new File(Environment.getUserSystemDirectory(userId), 1700 packageToRestrictionsFileName(packageName))); 1701 writeApplicationRestrictionsLocked(restrictions, restrictionsFile); 1702 } 1703 1704 @VisibleForTesting 1705 static void writeApplicationRestrictionsLocked(Bundle restrictions, 1706 AtomicFile restrictionsFile) { 1707 FileOutputStream fos = null; 1708 try { 1709 fos = restrictionsFile.startWrite(); 1710 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1711 1712 final XmlSerializer serializer = new FastXmlSerializer(); 1713 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1714 serializer.startDocument(null, true); 1715 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1716 1717 serializer.startTag(null, TAG_RESTRICTIONS); 1718 writeBundle(restrictions, serializer); 1719 serializer.endTag(null, TAG_RESTRICTIONS); 1720 1721 serializer.endDocument(); 1722 restrictionsFile.finishWrite(fos); 1723 } catch (Exception e) { 1724 restrictionsFile.failWrite(fos); 1725 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 1726 } 1727 } 1728 1729 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1730 throws IOException { 1731 for (String key : restrictions.keySet()) { 1732 Object value = restrictions.get(key); 1733 serializer.startTag(null, TAG_ENTRY); 1734 serializer.attribute(null, ATTR_KEY, key); 1735 1736 if (value instanceof Boolean) { 1737 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1738 serializer.text(value.toString()); 1739 } else if (value instanceof Integer) { 1740 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1741 serializer.text(value.toString()); 1742 } else if (value == null || value instanceof String) { 1743 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1744 serializer.text(value != null ? (String) value : ""); 1745 } else if (value instanceof Bundle) { 1746 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1747 writeBundle((Bundle) value, serializer); 1748 } else if (value instanceof Parcelable[]) { 1749 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 1750 Parcelable[] array = (Parcelable[]) value; 1751 for (Parcelable parcelable : array) { 1752 if (!(parcelable instanceof Bundle)) { 1753 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 1754 } 1755 serializer.startTag(null, TAG_ENTRY); 1756 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1757 writeBundle((Bundle) parcelable, serializer); 1758 serializer.endTag(null, TAG_ENTRY); 1759 } 1760 } else { 1761 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1762 String[] values = (String[]) value; 1763 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1764 for (String choice : values) { 1765 serializer.startTag(null, TAG_VALUE); 1766 serializer.text(choice != null ? choice : ""); 1767 serializer.endTag(null, TAG_VALUE); 1768 } 1769 } 1770 serializer.endTag(null, TAG_ENTRY); 1771 } 1772 } 1773 1774 @Override 1775 public int getUserSerialNumber(int userHandle) { 1776 synchronized (mPackagesLock) { 1777 if (!exists(userHandle)) return -1; 1778 return getUserInfoLocked(userHandle).serialNumber; 1779 } 1780 } 1781 1782 @Override 1783 public int getUserHandle(int userSerialNumber) { 1784 synchronized (mPackagesLock) { 1785 for (int userId : mUserIds) { 1786 UserInfo info = getUserInfoLocked(userId); 1787 if (info != null && info.serialNumber == userSerialNumber) return userId; 1788 } 1789 // Not found 1790 return -1; 1791 } 1792 } 1793 1794 @Override 1795 public long getUserCreationTime(int userHandle) { 1796 int callingUserId = UserHandle.getCallingUserId(); 1797 UserInfo userInfo = null; 1798 synchronized (mPackagesLock) { 1799 if (callingUserId == userHandle) { 1800 userInfo = getUserInfoLocked(userHandle); 1801 } else { 1802 UserInfo parent = getProfileParentLocked(userHandle); 1803 if (parent != null && parent.id == callingUserId) { 1804 userInfo = getUserInfoLocked(userHandle); 1805 } 1806 } 1807 } 1808 if (userInfo == null) { 1809 throw new SecurityException("userHandle can only be the calling user or a managed " 1810 + "profile associated with this user"); 1811 } 1812 return userInfo.creationTime; 1813 } 1814 1815 /** 1816 * Caches the list of user ids in an array, adjusting the array size when necessary. 1817 */ 1818 private void updateUserIdsLocked() { 1819 int num = 0; 1820 for (int i = 0; i < mUsers.size(); i++) { 1821 if (!mUsers.valueAt(i).partial) { 1822 num++; 1823 } 1824 } 1825 final int[] newUsers = new int[num]; 1826 int n = 0; 1827 for (int i = 0; i < mUsers.size(); i++) { 1828 if (!mUsers.valueAt(i).partial) { 1829 newUsers[n++] = mUsers.keyAt(i); 1830 } 1831 } 1832 mUserIds = newUsers; 1833 } 1834 1835 /** 1836 * Make a note of the last started time of a user and do some cleanup. 1837 * @param userId the user that was just foregrounded 1838 */ 1839 public void onUserForeground(int userId) { 1840 synchronized (mPackagesLock) { 1841 UserInfo user = mUsers.get(userId); 1842 long now = System.currentTimeMillis(); 1843 if (user == null || user.partial) { 1844 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1845 return; 1846 } 1847 if (now > EPOCH_PLUS_30_YEARS) { 1848 user.lastLoggedInTime = now; 1849 scheduleWriteUserLocked(user); 1850 } 1851 } 1852 } 1853 1854 /** 1855 * Returns the next available user id, filling in any holes in the ids. 1856 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1857 * for data and battery stats collection, or unexpected cross-talk. 1858 * @return 1859 */ 1860 private int getNextAvailableIdLocked() { 1861 synchronized (mPackagesLock) { 1862 int i = MIN_USER_ID; 1863 while (i < Integer.MAX_VALUE) { 1864 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1865 break; 1866 } 1867 i++; 1868 } 1869 return i; 1870 } 1871 } 1872 1873 private String packageToRestrictionsFileName(String packageName) { 1874 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1875 } 1876 1877 /** 1878 * Create new {@code /data/user/[id]} directory and sets default 1879 * permissions. 1880 */ 1881 public static void prepareUserDirectory(File file) throws IOException { 1882 if (!file.exists()) { 1883 if (!file.mkdir()) { 1884 throw new IOException("Failed to create " + file); 1885 } 1886 } 1887 if (FileUtils.setPermissions(file.getAbsolutePath(), 0771, Process.SYSTEM_UID, 1888 Process.SYSTEM_UID) != 0) { 1889 throw new IOException("Failed to prepare " + file); 1890 } 1891 } 1892 1893 /** 1894 * Enforce that serial number stored in user directory inode matches the 1895 * given expected value. Gracefully sets the serial number if currently 1896 * undefined. 1897 * 1898 * @throws IOException when problem extracting serial number, or serial 1899 * number is mismatched. 1900 */ 1901 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 1902 final int foundSerial = getSerialNumber(file); 1903 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 1904 1905 if (foundSerial == -1) { 1906 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 1907 try { 1908 setSerialNumber(file, serialNumber); 1909 } catch (IOException e) { 1910 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 1911 } 1912 1913 } else if (foundSerial != serialNumber) { 1914 throw new IOException("Found serial number " + foundSerial 1915 + " doesn't match expected " + serialNumber); 1916 } 1917 } 1918 1919 /** 1920 * Set serial number stored in user directory inode. 1921 * 1922 * @throws IOException if serial number was already set 1923 */ 1924 private static void setSerialNumber(File file, int serialNumber) 1925 throws IOException { 1926 try { 1927 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 1928 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 1929 } catch (ErrnoException e) { 1930 throw e.rethrowAsIOException(); 1931 } 1932 } 1933 1934 /** 1935 * Return serial number stored in user directory inode. 1936 * 1937 * @return parsed serial number, or -1 if not set 1938 */ 1939 private static int getSerialNumber(File file) throws IOException { 1940 try { 1941 final byte[] buf = new byte[256]; 1942 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 1943 final String serial = new String(buf, 0, len); 1944 try { 1945 return Integer.parseInt(serial); 1946 } catch (NumberFormatException e) { 1947 throw new IOException("Bad serial number: " + serial); 1948 } 1949 } catch (ErrnoException e) { 1950 if (e.errno == OsConstants.ENODATA) { 1951 return -1; 1952 } else { 1953 throw e.rethrowAsIOException(); 1954 } 1955 } 1956 } 1957 1958 @Override 1959 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1960 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1961 != PackageManager.PERMISSION_GRANTED) { 1962 pw.println("Permission Denial: can't dump UserManager from from pid=" 1963 + Binder.getCallingPid() 1964 + ", uid=" + Binder.getCallingUid() 1965 + " without permission " 1966 + android.Manifest.permission.DUMP); 1967 return; 1968 } 1969 1970 long now = System.currentTimeMillis(); 1971 StringBuilder sb = new StringBuilder(); 1972 synchronized (mPackagesLock) { 1973 pw.println("Users:"); 1974 for (int i = 0; i < mUsers.size(); i++) { 1975 UserInfo user = mUsers.valueAt(i); 1976 if (user == null) continue; 1977 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1978 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1979 if (user.partial) pw.print(" <partial>"); 1980 pw.println(); 1981 pw.print(" Created: "); 1982 if (user.creationTime == 0) { 1983 pw.println("<unknown>"); 1984 } else { 1985 sb.setLength(0); 1986 TimeUtils.formatDuration(now - user.creationTime, sb); 1987 sb.append(" ago"); 1988 pw.println(sb); 1989 } 1990 pw.print(" Last logged in: "); 1991 if (user.lastLoggedInTime == 0) { 1992 pw.println("<unknown>"); 1993 } else { 1994 sb.setLength(0); 1995 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1996 sb.append(" ago"); 1997 pw.println(sb); 1998 } 1999 } 2000 } 2001 } 2002 2003 final class MainHandler extends Handler { 2004 2005 @Override 2006 public void handleMessage(Message msg) { 2007 switch (msg.what) { 2008 case WRITE_USER_MSG: 2009 removeMessages(WRITE_USER_MSG, msg.obj); 2010 synchronized (mPackagesLock) { 2011 int userId = ((UserInfo) msg.obj).id; 2012 UserInfo userInfo = mUsers.get(userId); 2013 if (userInfo != null) { 2014 writeUserLocked(userInfo); 2015 } 2016 } 2017 } 2018 } 2019 } 2020 2021 /** 2022 * @param userId 2023 * @return whether the user has been initialized yet 2024 */ 2025 boolean isInitialized(int userId) { 2026 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2027 } 2028} 2029