UserManagerService.java revision f05b9d0830ab7fd1ba4da8801194353889919ffc
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.accounts.Account; 20import android.annotation.NonNull; 21import android.app.Activity; 22import android.app.ActivityManager; 23import android.app.ActivityManagerInternal; 24import android.app.ActivityManagerNative; 25import android.app.IStopUserCallback; 26import android.app.admin.DevicePolicyManager; 27import android.content.BroadcastReceiver; 28import android.content.Context; 29import android.content.Intent; 30import android.content.pm.ApplicationInfo; 31import android.content.pm.PackageManager; 32import android.content.pm.PackageManager.NameNotFoundException; 33import android.content.pm.UserInfo; 34import android.graphics.Bitmap; 35import android.os.Binder; 36import android.os.Bundle; 37import android.os.Environment; 38import android.os.FileUtils; 39import android.os.Handler; 40import android.os.IUserManager; 41import android.os.Message; 42import android.os.ParcelFileDescriptor; 43import android.os.Parcelable; 44import android.os.Process; 45import android.os.RemoteException; 46import android.os.ServiceManager; 47import android.os.SystemProperties; 48import android.os.UserHandle; 49import android.os.UserManager; 50import android.os.storage.StorageManager; 51import android.os.storage.VolumeInfo; 52import android.system.ErrnoException; 53import android.system.Os; 54import android.system.OsConstants; 55import android.util.AtomicFile; 56import android.util.Log; 57import android.util.Slog; 58import android.util.SparseArray; 59import android.util.SparseBooleanArray; 60import android.util.TimeUtils; 61import android.util.Xml; 62 63import com.android.internal.annotations.VisibleForTesting; 64import com.android.internal.app.IAppOpsService; 65import com.android.internal.util.FastXmlSerializer; 66import com.android.internal.util.XmlUtils; 67import com.android.server.LocalServices; 68 69import org.xmlpull.v1.XmlPullParser; 70import org.xmlpull.v1.XmlPullParserException; 71import org.xmlpull.v1.XmlSerializer; 72 73import java.io.BufferedOutputStream; 74import java.io.File; 75import java.io.FileDescriptor; 76import java.io.FileInputStream; 77import java.io.FileNotFoundException; 78import java.io.FileOutputStream; 79import java.io.IOException; 80import java.io.PrintWriter; 81import java.nio.charset.StandardCharsets; 82import java.util.ArrayList; 83import java.util.List; 84 85import libcore.io.IoUtils; 86 87public class UserManagerService extends IUserManager.Stub { 88 89 private static final String LOG_TAG = "UserManagerService"; 90 91 private static final boolean DBG = false; 92 93 private static final String TAG_NAME = "name"; 94 private static final String ATTR_FLAGS = "flags"; 95 private static final String ATTR_ICON_PATH = "icon"; 96 private static final String ATTR_ID = "id"; 97 private static final String ATTR_CREATION_TIME = "created"; 98 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 99 private static final String ATTR_SERIAL_NO = "serialNumber"; 100 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 101 private static final String ATTR_PARTIAL = "partial"; 102 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 103 private static final String ATTR_USER_VERSION = "version"; 104 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 105 private static final String ATTR_RESTRICTED_PROFILE_PARENT_ID = "restrictedProfileParentId"; 106 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 107 private static final String TAG_USERS = "users"; 108 private static final String TAG_USER = "user"; 109 private static final String TAG_RESTRICTIONS = "restrictions"; 110 private static final String TAG_ENTRY = "entry"; 111 private static final String TAG_VALUE = "value"; 112 private static final String ATTR_KEY = "key"; 113 private static final String ATTR_VALUE_TYPE = "type"; 114 private static final String ATTR_MULTIPLE = "m"; 115 116 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 117 private static final String ATTR_TYPE_STRING = "s"; 118 private static final String ATTR_TYPE_BOOLEAN = "b"; 119 private static final String ATTR_TYPE_INTEGER = "i"; 120 private static final String ATTR_TYPE_BUNDLE = "B"; 121 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 122 123 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 124 private static final String USER_LIST_FILENAME = "userlist.xml"; 125 private static final String USER_PHOTO_FILENAME = "photo.png"; 126 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 127 128 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 129 private static final String XML_SUFFIX = ".xml"; 130 131 private static final int MIN_USER_ID = 10; 132 // We need to keep process uid within Integer.MAX_VALUE. 133 private static final int MAX_USER_ID = Integer.MAX_VALUE / UserHandle.PER_USER_RANGE; 134 135 private static final int USER_VERSION = 6; 136 137 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 138 139 // Maximum number of managed profiles permitted per user is 1. This cannot be increased 140 // without first making sure that the rest of the framework is prepared for it. 141 private static final int MAX_MANAGED_PROFILES = 1; 142 143 static final int WRITE_USER_MSG = 1; 144 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 145 146 private static final String XATTR_SERIAL = "user.serial"; 147 148 private final Context mContext; 149 private final PackageManagerService mPm; 150 private final Object mInstallLock; 151 private final Object mPackagesLock; 152 153 private final Handler mHandler; 154 155 private final File mUsersDir; 156 private final File mUserListFile; 157 158 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 159 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 160 private final Bundle mGuestRestrictions = new Bundle(); 161 162 /** 163 * Set of user IDs being actively removed. Removed IDs linger in this set 164 * for several seconds to work around a VFS caching issue. 165 */ 166 // @GuardedBy("mPackagesLock") 167 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 168 169 private int[] mUserIds; 170 private int mNextSerialNumber; 171 private int mUserVersion = 0; 172 173 private IAppOpsService mAppOpsService; 174 175 private static UserManagerService sInstance; 176 177 public static UserManagerService getInstance() { 178 synchronized (UserManagerService.class) { 179 return sInstance; 180 } 181 } 182 183 /** 184 * Available for testing purposes. 185 */ 186 UserManagerService(File dataDir, File baseUserPath) { 187 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 188 } 189 190 /** 191 * Called by package manager to create the service. This is closely 192 * associated with the package manager, and the given lock is the 193 * package manager's own lock. 194 */ 195 UserManagerService(Context context, PackageManagerService pm, 196 Object installLock, Object packagesLock) { 197 this(context, pm, installLock, packagesLock, 198 Environment.getDataDirectory(), 199 new File(Environment.getDataDirectory(), "user")); 200 } 201 202 /** 203 * Available for testing purposes. 204 */ 205 private UserManagerService(Context context, PackageManagerService pm, 206 Object installLock, Object packagesLock, 207 File dataDir, File baseUserPath) { 208 mContext = context; 209 mPm = pm; 210 mInstallLock = installLock; 211 mPackagesLock = packagesLock; 212 mHandler = new MainHandler(); 213 synchronized (mInstallLock) { 214 synchronized (mPackagesLock) { 215 mUsersDir = new File(dataDir, USER_INFO_DIR); 216 mUsersDir.mkdirs(); 217 // Make zeroth user directory, for services to migrate their files to that location 218 File userZeroDir = new File(mUsersDir, String.valueOf(UserHandle.USER_SYSTEM)); 219 userZeroDir.mkdirs(); 220 FileUtils.setPermissions(mUsersDir.toString(), 221 FileUtils.S_IRWXU|FileUtils.S_IRWXG 222 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 223 -1, -1); 224 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 225 initDefaultGuestRestrictions(); 226 readUserListLocked(); 227 sInstance = this; 228 } 229 } 230 } 231 232 void systemReady() { 233 synchronized (mInstallLock) { 234 synchronized (mPackagesLock) { 235 // Prune out any partially created/partially removed users. 236 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 237 final int userSize = mUsers.size(); 238 for (int i = 0; i < userSize; i++) { 239 UserInfo ui = mUsers.valueAt(i); 240 if ((ui.partial || ui.guestToRemove) && i != 0) { 241 partials.add(ui); 242 } 243 } 244 final int partialsSize = partials.size(); 245 for (int i = 0; i < partialsSize; i++) { 246 UserInfo ui = partials.get(i); 247 Slog.w(LOG_TAG, "Removing partially created user " + ui.id 248 + " (name=" + ui.name + ")"); 249 removeUserStateLocked(ui.id); 250 } 251 } 252 } 253 onUserForeground(UserHandle.USER_SYSTEM); 254 mAppOpsService = IAppOpsService.Stub.asInterface( 255 ServiceManager.getService(Context.APP_OPS_SERVICE)); 256 for (int i = 0; i < mUserIds.length; ++i) { 257 try { 258 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 259 } catch (RemoteException e) { 260 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 261 } 262 } 263 } 264 265 @Override 266 public UserInfo getPrimaryUser() { 267 checkManageUsersPermission("query users"); 268 synchronized (mPackagesLock) { 269 final int userSize = mUsers.size(); 270 for (int i = 0; i < userSize; i++) { 271 UserInfo ui = mUsers.valueAt(i); 272 if (ui.isPrimary()) { 273 return ui; 274 } 275 } 276 } 277 return null; 278 } 279 280 @Override 281 public @NonNull List<UserInfo> getUsers(boolean excludeDying) { 282 checkManageUsersPermission("query users"); 283 synchronized (mPackagesLock) { 284 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 285 final int userSize = mUsers.size(); 286 for (int i = 0; i < userSize; i++) { 287 UserInfo ui = mUsers.valueAt(i); 288 if (ui.partial) { 289 continue; 290 } 291 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 292 users.add(ui); 293 } 294 } 295 return users; 296 } 297 } 298 299 @Override 300 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 301 if (userId != UserHandle.getCallingUserId()) { 302 checkManageUsersPermission("getting profiles related to user " + userId); 303 } 304 final long ident = Binder.clearCallingIdentity(); 305 try { 306 synchronized (mPackagesLock) { 307 return getProfilesLocked(userId, enabledOnly); 308 } 309 } finally { 310 Binder.restoreCallingIdentity(ident); 311 } 312 } 313 314 /** Assume permissions already checked and caller's identity cleared */ 315 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 316 UserInfo user = getUserInfoLocked(userId); 317 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 318 if (user == null) { 319 // Probably a dying user 320 return users; 321 } 322 final int userSize = mUsers.size(); 323 for (int i = 0; i < userSize; i++) { 324 UserInfo profile = mUsers.valueAt(i); 325 if (!isProfileOf(user, profile)) { 326 continue; 327 } 328 if (enabledOnly && !profile.isEnabled()) { 329 continue; 330 } 331 if (mRemovingUserIds.get(profile.id)) { 332 continue; 333 } 334 users.add(profile); 335 } 336 return users; 337 } 338 339 @Override 340 public int getCredentialOwnerProfile(int userHandle) { 341 checkManageUsersPermission("get the credential owner"); 342 if (!"file".equals(SystemProperties.get("ro.crypto.type", "none"))) { 343 synchronized (mPackagesLock) { 344 UserInfo profileParent = getProfileParentLocked(userHandle); 345 if (profileParent != null) { 346 return profileParent.id; 347 } 348 } 349 } 350 351 return userHandle; 352 } 353 354 @Override 355 public boolean isSameProfileGroup(int userId, int otherUserId) { 356 if (userId == otherUserId) return true; 357 checkManageUsersPermission("check if in the same profile group"); 358 synchronized (mPackagesLock) { 359 return isSameProfileGroupLocked(userId, otherUserId); 360 } 361 } 362 363 private boolean isSameProfileGroupLocked(int userId, int otherUserId) { 364 UserInfo userInfo = getUserInfoLocked(userId); 365 if (userInfo == null || userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 366 return false; 367 } 368 UserInfo otherUserInfo = getUserInfoLocked(otherUserId); 369 if (otherUserInfo == null || otherUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 370 return false; 371 } 372 return userInfo.profileGroupId == otherUserInfo.profileGroupId; 373 } 374 375 @Override 376 public UserInfo getProfileParent(int userHandle) { 377 checkManageUsersPermission("get the profile parent"); 378 synchronized (mPackagesLock) { 379 return getProfileParentLocked(userHandle); 380 } 381 } 382 383 private UserInfo getProfileParentLocked(int userHandle) { 384 UserInfo profile = getUserInfoLocked(userHandle); 385 if (profile == null) { 386 return null; 387 } 388 int parentUserId = profile.profileGroupId; 389 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 390 return null; 391 } else { 392 return getUserInfoLocked(parentUserId); 393 } 394 } 395 396 private boolean isProfileOf(UserInfo user, UserInfo profile) { 397 return user.id == profile.id || 398 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 399 && user.profileGroupId == profile.profileGroupId); 400 } 401 402 @Override 403 public void setUserEnabled(int userId) { 404 checkManageUsersPermission("enable user"); 405 synchronized (mPackagesLock) { 406 UserInfo info = getUserInfoLocked(userId); 407 if (info != null && !info.isEnabled()) { 408 info.flags ^= UserInfo.FLAG_DISABLED; 409 writeUserLocked(info); 410 } 411 } 412 } 413 414 @Override 415 public UserInfo getUserInfo(int userId) { 416 checkManageUsersPermission("query user"); 417 synchronized (mPackagesLock) { 418 return getUserInfoLocked(userId); 419 } 420 } 421 422 @Override 423 public boolean isRestricted() { 424 synchronized (mPackagesLock) { 425 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 426 } 427 } 428 429 @Override 430 public boolean canHaveRestrictedProfile(int userId) { 431 checkManageUsersPermission("canHaveRestrictedProfile"); 432 synchronized (mPackagesLock) { 433 final UserInfo userInfo = getUserInfoLocked(userId); 434 if (userInfo == null || !userInfo.canHaveProfile()) { 435 return false; 436 } 437 if (!userInfo.isAdmin()) { 438 return false; 439 } 440 } 441 DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService( 442 Context.DEVICE_POLICY_SERVICE); 443 // restricted profile can be created if there is no DO set and the admin user has no PO 444 return dpm.getDeviceOwner() == null && dpm.getProfileOwnerAsUser(userId) == null; 445 } 446 447 /* 448 * Should be locked on mUsers before calling this. 449 */ 450 private UserInfo getUserInfoLocked(int userId) { 451 UserInfo ui = mUsers.get(userId); 452 // If it is partial and not in the process of being removed, return as unknown user. 453 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 454 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 455 return null; 456 } 457 return ui; 458 } 459 460 /** Called by PackageManagerService */ 461 public boolean exists(int userId) { 462 synchronized (mPackagesLock) { 463 return mUsers.get(userId) != null; 464 } 465 } 466 467 @Override 468 public void setUserName(int userId, String name) { 469 checkManageUsersPermission("rename users"); 470 boolean changed = false; 471 synchronized (mPackagesLock) { 472 UserInfo info = mUsers.get(userId); 473 if (info == null || info.partial) { 474 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 475 return; 476 } 477 if (name != null && !name.equals(info.name)) { 478 info.name = name; 479 writeUserLocked(info); 480 changed = true; 481 } 482 } 483 if (changed) { 484 sendUserInfoChangedBroadcast(userId); 485 } 486 } 487 488 @Override 489 public void setUserIcon(int userId, Bitmap bitmap) { 490 checkManageUsersPermission("update users"); 491 long ident = Binder.clearCallingIdentity(); 492 try { 493 synchronized (mPackagesLock) { 494 UserInfo info = mUsers.get(userId); 495 if (info == null || info.partial) { 496 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 497 return; 498 } 499 writeBitmapLocked(info, bitmap); 500 writeUserLocked(info); 501 } 502 sendUserInfoChangedBroadcast(userId); 503 } finally { 504 Binder.restoreCallingIdentity(ident); 505 } 506 } 507 508 private void sendUserInfoChangedBroadcast(int userId) { 509 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 510 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 511 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 512 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 513 } 514 515 @Override 516 public ParcelFileDescriptor getUserIcon(int userId) { 517 String iconPath; 518 synchronized (mPackagesLock) { 519 UserInfo info = mUsers.get(userId); 520 if (info == null || info.partial) { 521 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 522 return null; 523 } 524 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 525 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 526 || callingGroupId != info.profileGroupId) { 527 checkManageUsersPermission("get the icon of a user who is not related"); 528 } 529 if (info.iconPath == null) { 530 return null; 531 } 532 iconPath = info.iconPath; 533 } 534 535 try { 536 return ParcelFileDescriptor.open( 537 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 538 } catch (FileNotFoundException e) { 539 Log.e(LOG_TAG, "Couldn't find icon file", e); 540 } 541 return null; 542 } 543 544 public void makeInitialized(int userId) { 545 checkManageUsersPermission("makeInitialized"); 546 synchronized (mPackagesLock) { 547 UserInfo info = mUsers.get(userId); 548 if (info == null || info.partial) { 549 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 550 } 551 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 552 info.flags |= UserInfo.FLAG_INITIALIZED; 553 scheduleWriteUserLocked(info); 554 } 555 } 556 } 557 558 /** 559 * If default guest restrictions haven't been initialized yet, add the basic 560 * restrictions. 561 */ 562 private void initDefaultGuestRestrictions() { 563 if (mGuestRestrictions.isEmpty()) { 564 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 565 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 566 } 567 } 568 569 @Override 570 public Bundle getDefaultGuestRestrictions() { 571 checkManageUsersPermission("getDefaultGuestRestrictions"); 572 synchronized (mPackagesLock) { 573 return new Bundle(mGuestRestrictions); 574 } 575 } 576 577 @Override 578 public void setDefaultGuestRestrictions(Bundle restrictions) { 579 checkManageUsersPermission("setDefaultGuestRestrictions"); 580 synchronized (mPackagesLock) { 581 mGuestRestrictions.clear(); 582 mGuestRestrictions.putAll(restrictions); 583 writeUserListLocked(); 584 } 585 } 586 587 @Override 588 public boolean hasUserRestriction(String restrictionKey, int userId) { 589 synchronized (mPackagesLock) { 590 Bundle restrictions = mUserRestrictions.get(userId); 591 return restrictions != null && restrictions.getBoolean(restrictionKey); 592 } 593 } 594 595 @Override 596 public Bundle getUserRestrictions(int userId) { 597 synchronized (mPackagesLock) { 598 Bundle restrictions = mUserRestrictions.get(userId); 599 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 600 } 601 } 602 603 @Override 604 public void setUserRestriction(String key, boolean value, int userId) { 605 checkManageUsersPermission("setUserRestriction"); 606 synchronized (mPackagesLock) { 607 if (!UserRestrictionsUtils.SYSTEM_CONTROLLED_USER_RESTRICTIONS.contains(key)) { 608 Bundle restrictions = getUserRestrictions(userId); 609 restrictions.putBoolean(key, value); 610 setUserRestrictionsInternalLocked(restrictions, userId); 611 } 612 } 613 } 614 615 @Override 616 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 617 checkSystemOrRoot("setSystemControlledUserRestriction"); 618 synchronized (mPackagesLock) { 619 Bundle restrictions = getUserRestrictions(userId); 620 restrictions.putBoolean(key, value); 621 setUserRestrictionsInternalLocked(restrictions, userId); 622 } 623 } 624 625 @Override 626 public void setUserRestrictions(Bundle restrictions, int userId) { 627 checkManageUsersPermission("setUserRestrictions"); 628 if (restrictions == null) return; 629 630 synchronized (mPackagesLock) { 631 final Bundle oldUserRestrictions = mUserRestrictions.get(userId); 632 // Restore the original state of system controlled restrictions from oldUserRestrictions 633 for (String key : UserRestrictionsUtils.SYSTEM_CONTROLLED_USER_RESTRICTIONS) { 634 restrictions.remove(key); 635 if (oldUserRestrictions.containsKey(key)) { 636 restrictions.putBoolean(key, oldUserRestrictions.getBoolean(key)); 637 } 638 } 639 setUserRestrictionsInternalLocked(restrictions, userId); 640 } 641 } 642 643 private void setUserRestrictionsInternalLocked(Bundle restrictions, int userId) { 644 final Bundle userRestrictions = mUserRestrictions.get(userId); 645 userRestrictions.clear(); 646 userRestrictions.putAll(restrictions); 647 long token = Binder.clearCallingIdentity(); 648 try { 649 mAppOpsService.setUserRestrictions(userRestrictions, userId); 650 } catch (RemoteException e) { 651 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 652 } finally { 653 Binder.restoreCallingIdentity(token); 654 } 655 scheduleWriteUserLocked(mUsers.get(userId)); 656 } 657 658 /** 659 * Check if we've hit the limit of how many users can be created. 660 */ 661 private boolean isUserLimitReachedLocked() { 662 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 663 } 664 665 @Override 666 public boolean canAddMoreManagedProfiles(int userId) { 667 checkManageUsersPermission("check if more managed profiles can be added."); 668 if (ActivityManager.isLowRamDeviceStatic()) { 669 return false; 670 } 671 if (!mContext.getPackageManager().hasSystemFeature( 672 PackageManager.FEATURE_MANAGED_USERS)) { 673 return false; 674 } 675 // Limit number of managed profiles that can be created 676 int managedProfilesCount = getProfiles(userId, true).size() - 1; 677 if (managedProfilesCount >= MAX_MANAGED_PROFILES) { 678 return false; 679 } 680 synchronized(mPackagesLock) { 681 UserInfo userInfo = getUserInfoLocked(userId); 682 if (!userInfo.canHaveProfile()) { 683 return false; 684 } 685 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 686 // We allow creating a managed profile in the special case where there is only one user. 687 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 688 } 689 } 690 691 private int getAliveUsersExcludingGuestsCountLocked() { 692 int aliveUserCount = 0; 693 final int totalUserCount = mUsers.size(); 694 // Skip over users being removed 695 for (int i = 0; i < totalUserCount; i++) { 696 UserInfo user = mUsers.valueAt(i); 697 if (!mRemovingUserIds.get(user.id) 698 && !user.isGuest() && !user.partial) { 699 aliveUserCount++; 700 } 701 } 702 return aliveUserCount; 703 } 704 705 /** 706 * Enforces that only the system UID or root's UID or apps that have the 707 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 708 * permission can make certain calls to the UserManager. 709 * 710 * @param message used as message if SecurityException is thrown 711 * @throws SecurityException if the caller is not system or root 712 */ 713 private static final void checkManageUsersPermission(String message) { 714 final int uid = Binder.getCallingUid(); 715 if (uid != Process.SYSTEM_UID && uid != 0 716 && ActivityManager.checkComponentPermission( 717 android.Manifest.permission.MANAGE_USERS, 718 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 719 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 720 } 721 } 722 723 private static void checkSystemOrRoot(String message) { 724 final int uid = Binder.getCallingUid(); 725 if (uid != Process.SYSTEM_UID && uid != 0) { 726 throw new SecurityException("Only system may call: " + message); 727 } 728 } 729 730 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 731 try { 732 File dir = new File(mUsersDir, Integer.toString(info.id)); 733 File file = new File(dir, USER_PHOTO_FILENAME); 734 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 735 if (!dir.exists()) { 736 dir.mkdir(); 737 FileUtils.setPermissions( 738 dir.getPath(), 739 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 740 -1, -1); 741 } 742 FileOutputStream os; 743 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 744 && tmp.renameTo(file)) { 745 info.iconPath = file.getAbsolutePath(); 746 } 747 try { 748 os.close(); 749 } catch (IOException ioe) { 750 // What the ... ! 751 } 752 tmp.delete(); 753 } catch (FileNotFoundException e) { 754 Slog.w(LOG_TAG, "Error setting photo for user ", e); 755 } 756 } 757 758 /** 759 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 760 * cache it elsewhere. 761 * @return the array of user ids. 762 */ 763 public int[] getUserIds() { 764 synchronized (mPackagesLock) { 765 return mUserIds; 766 } 767 } 768 769 int[] getUserIdsLPr() { 770 return mUserIds; 771 } 772 773 private void readUserListLocked() { 774 if (!mUserListFile.exists()) { 775 fallbackToSingleUserLocked(); 776 return; 777 } 778 FileInputStream fis = null; 779 AtomicFile userListFile = new AtomicFile(mUserListFile); 780 try { 781 fis = userListFile.openRead(); 782 XmlPullParser parser = Xml.newPullParser(); 783 parser.setInput(fis, StandardCharsets.UTF_8.name()); 784 int type; 785 while ((type = parser.next()) != XmlPullParser.START_TAG 786 && type != XmlPullParser.END_DOCUMENT) { 787 ; 788 } 789 790 if (type != XmlPullParser.START_TAG) { 791 Slog.e(LOG_TAG, "Unable to read user list"); 792 fallbackToSingleUserLocked(); 793 return; 794 } 795 796 mNextSerialNumber = -1; 797 if (parser.getName().equals(TAG_USERS)) { 798 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 799 if (lastSerialNumber != null) { 800 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 801 } 802 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 803 if (versionNumber != null) { 804 mUserVersion = Integer.parseInt(versionNumber); 805 } 806 } 807 808 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 809 if (type == XmlPullParser.START_TAG) { 810 final String name = parser.getName(); 811 if (name.equals(TAG_USER)) { 812 String id = parser.getAttributeValue(null, ATTR_ID); 813 UserInfo user = readUserLocked(Integer.parseInt(id)); 814 815 if (user != null) { 816 mUsers.put(user.id, user); 817 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 818 mNextSerialNumber = user.id + 1; 819 } 820 } 821 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 822 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 823 && type != XmlPullParser.END_TAG) { 824 if (type == XmlPullParser.START_TAG) { 825 if (parser.getName().equals(TAG_RESTRICTIONS)) { 826 UserRestrictionsUtils 827 .readRestrictions(parser, mGuestRestrictions); 828 } 829 break; 830 } 831 } 832 } 833 } 834 } 835 updateUserIdsLocked(); 836 upgradeIfNecessaryLocked(); 837 } catch (IOException ioe) { 838 fallbackToSingleUserLocked(); 839 } catch (XmlPullParserException pe) { 840 fallbackToSingleUserLocked(); 841 } finally { 842 if (fis != null) { 843 try { 844 fis.close(); 845 } catch (IOException e) { 846 } 847 } 848 } 849 } 850 851 /** 852 * Upgrade steps between versions, either for fixing bugs or changing the data format. 853 */ 854 private void upgradeIfNecessaryLocked() { 855 int userVersion = mUserVersion; 856 if (userVersion < 1) { 857 // Assign a proper name for the owner, if not initialized correctly before 858 UserInfo user = mUsers.get(UserHandle.USER_SYSTEM); 859 if ("Primary".equals(user.name)) { 860 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 861 scheduleWriteUserLocked(user); 862 } 863 userVersion = 1; 864 } 865 866 if (userVersion < 2) { 867 // Owner should be marked as initialized 868 UserInfo user = mUsers.get(UserHandle.USER_SYSTEM); 869 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 870 user.flags |= UserInfo.FLAG_INITIALIZED; 871 scheduleWriteUserLocked(user); 872 } 873 userVersion = 2; 874 } 875 876 877 if (userVersion < 4) { 878 userVersion = 4; 879 } 880 881 if (userVersion < 5) { 882 initDefaultGuestRestrictions(); 883 userVersion = 5; 884 } 885 886 if (userVersion < 6) { 887 final boolean splitSystemUser = UserManager.isSplitSystemUser(); 888 for (int i = 0; i < mUsers.size(); i++) { 889 UserInfo user = mUsers.valueAt(i); 890 // In non-split mode, only user 0 can have restricted profiles 891 if (!splitSystemUser && user.isRestricted() 892 && (user.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID)) { 893 user.restrictedProfileParentId = UserHandle.USER_SYSTEM; 894 scheduleWriteUserLocked(user); 895 } 896 } 897 userVersion = 6; 898 } 899 900 if (userVersion < USER_VERSION) { 901 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 902 + USER_VERSION); 903 } else { 904 mUserVersion = userVersion; 905 writeUserListLocked(); 906 } 907 } 908 909 private void fallbackToSingleUserLocked() { 910 int flags = UserInfo.FLAG_INITIALIZED; 911 // In split system user mode, the admin and primary flags are assigned to the first human 912 // user. 913 if (!UserManager.isSplitSystemUser()) { 914 flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY; 915 } 916 // Create the system user 917 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 918 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 919 flags); 920 mUsers.put(system.id, system); 921 mNextSerialNumber = MIN_USER_ID; 922 mUserVersion = USER_VERSION; 923 924 Bundle restrictions = new Bundle(); 925 mUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 926 927 updateUserIdsLocked(); 928 initDefaultGuestRestrictions(); 929 930 writeUserListLocked(); 931 writeUserLocked(system); 932 } 933 934 private void scheduleWriteUserLocked(UserInfo userInfo) { 935 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 936 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 937 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 938 } 939 } 940 941 /* 942 * Writes the user file in this format: 943 * 944 * <user flags="20039023" id="0"> 945 * <name>Primary</name> 946 * </user> 947 */ 948 private void writeUserLocked(UserInfo userInfo) { 949 FileOutputStream fos = null; 950 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 951 try { 952 fos = userFile.startWrite(); 953 final BufferedOutputStream bos = new BufferedOutputStream(fos); 954 955 // XmlSerializer serializer = XmlUtils.serializerInstance(); 956 final XmlSerializer serializer = new FastXmlSerializer(); 957 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 958 serializer.startDocument(null, true); 959 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 960 961 serializer.startTag(null, TAG_USER); 962 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 963 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 964 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 965 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 966 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 967 Long.toString(userInfo.lastLoggedInTime)); 968 if (userInfo.iconPath != null) { 969 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 970 } 971 if (userInfo.partial) { 972 serializer.attribute(null, ATTR_PARTIAL, "true"); 973 } 974 if (userInfo.guestToRemove) { 975 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 976 } 977 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 978 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 979 Integer.toString(userInfo.profileGroupId)); 980 } 981 if (userInfo.restrictedProfileParentId != UserInfo.NO_PROFILE_GROUP_ID) { 982 serializer.attribute(null, ATTR_RESTRICTED_PROFILE_PARENT_ID, 983 Integer.toString(userInfo.restrictedProfileParentId)); 984 } 985 serializer.startTag(null, TAG_NAME); 986 serializer.text(userInfo.name); 987 serializer.endTag(null, TAG_NAME); 988 Bundle restrictions = mUserRestrictions.get(userInfo.id); 989 if (restrictions != null) { 990 UserRestrictionsUtils.writeRestrictions(serializer, restrictions, TAG_RESTRICTIONS); 991 } 992 serializer.endTag(null, TAG_USER); 993 994 serializer.endDocument(); 995 userFile.finishWrite(fos); 996 } catch (Exception ioe) { 997 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 998 userFile.failWrite(fos); 999 } 1000 } 1001 1002 /* 1003 * Writes the user list file in this format: 1004 * 1005 * <users nextSerialNumber="3"> 1006 * <user id="0"></user> 1007 * <user id="2"></user> 1008 * </users> 1009 */ 1010 private void writeUserListLocked() { 1011 FileOutputStream fos = null; 1012 AtomicFile userListFile = new AtomicFile(mUserListFile); 1013 try { 1014 fos = userListFile.startWrite(); 1015 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1016 1017 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1018 final XmlSerializer serializer = new FastXmlSerializer(); 1019 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1020 serializer.startDocument(null, true); 1021 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1022 1023 serializer.startTag(null, TAG_USERS); 1024 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 1025 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 1026 1027 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 1028 UserRestrictionsUtils 1029 .writeRestrictions(serializer, mGuestRestrictions, TAG_RESTRICTIONS); 1030 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 1031 final int userSize = mUsers.size(); 1032 for (int i = 0; i < userSize; i++) { 1033 UserInfo user = mUsers.valueAt(i); 1034 serializer.startTag(null, TAG_USER); 1035 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 1036 serializer.endTag(null, TAG_USER); 1037 } 1038 1039 serializer.endTag(null, TAG_USERS); 1040 1041 serializer.endDocument(); 1042 userListFile.finishWrite(fos); 1043 } catch (Exception e) { 1044 userListFile.failWrite(fos); 1045 Slog.e(LOG_TAG, "Error writing user list"); 1046 } 1047 } 1048 1049 private UserInfo readUserLocked(int id) { 1050 int flags = 0; 1051 int serialNumber = id; 1052 String name = null; 1053 String iconPath = null; 1054 long creationTime = 0L; 1055 long lastLoggedInTime = 0L; 1056 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1057 int restrictedProfileParentId = UserInfo.NO_PROFILE_GROUP_ID; 1058 boolean partial = false; 1059 boolean guestToRemove = false; 1060 Bundle restrictions = new Bundle(); 1061 1062 FileInputStream fis = null; 1063 try { 1064 AtomicFile userFile = 1065 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1066 fis = userFile.openRead(); 1067 XmlPullParser parser = Xml.newPullParser(); 1068 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1069 int type; 1070 while ((type = parser.next()) != XmlPullParser.START_TAG 1071 && type != XmlPullParser.END_DOCUMENT) { 1072 ; 1073 } 1074 1075 if (type != XmlPullParser.START_TAG) { 1076 Slog.e(LOG_TAG, "Unable to read user " + id); 1077 return null; 1078 } 1079 1080 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1081 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1082 if (storedId != id) { 1083 Slog.e(LOG_TAG, "User id does not match the file name"); 1084 return null; 1085 } 1086 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1087 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1088 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1089 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1090 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1091 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1092 UserInfo.NO_PROFILE_GROUP_ID); 1093 restrictedProfileParentId = readIntAttribute(parser, 1094 ATTR_RESTRICTED_PROFILE_PARENT_ID, UserInfo.NO_PROFILE_GROUP_ID); 1095 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1096 if ("true".equals(valueString)) { 1097 partial = true; 1098 } 1099 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1100 if ("true".equals(valueString)) { 1101 guestToRemove = true; 1102 } 1103 1104 int outerDepth = parser.getDepth(); 1105 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1106 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1107 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1108 continue; 1109 } 1110 String tag = parser.getName(); 1111 if (TAG_NAME.equals(tag)) { 1112 type = parser.next(); 1113 if (type == XmlPullParser.TEXT) { 1114 name = parser.getText(); 1115 } 1116 } else if (TAG_RESTRICTIONS.equals(tag)) { 1117 UserRestrictionsUtils.readRestrictions(parser, restrictions); 1118 } 1119 } 1120 } 1121 1122 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1123 userInfo.serialNumber = serialNumber; 1124 userInfo.creationTime = creationTime; 1125 userInfo.lastLoggedInTime = lastLoggedInTime; 1126 userInfo.partial = partial; 1127 userInfo.guestToRemove = guestToRemove; 1128 userInfo.profileGroupId = profileGroupId; 1129 userInfo.restrictedProfileParentId = restrictedProfileParentId; 1130 mUserRestrictions.append(id, restrictions); 1131 return userInfo; 1132 1133 } catch (IOException ioe) { 1134 } catch (XmlPullParserException pe) { 1135 } finally { 1136 if (fis != null) { 1137 try { 1138 fis.close(); 1139 } catch (IOException e) { 1140 } 1141 } 1142 } 1143 return null; 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 return createUserInternal(name, flags, userId); 1213 } 1214 1215 @Override 1216 public UserInfo createUser(String name, int flags) { 1217 checkManageUsersPermission("Only the system can create users"); 1218 return createUserInternal(name, flags, UserHandle.USER_NULL); 1219 } 1220 1221 private UserInfo createUserInternal(String name, int flags, int parentId) { 1222 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1223 UserManager.DISALLOW_ADD_USER, false)) { 1224 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1225 return null; 1226 } 1227 if (ActivityManager.isLowRamDeviceStatic()) { 1228 return null; 1229 } 1230 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1231 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1232 final boolean isRestricted = (flags & UserInfo.FLAG_RESTRICTED) != 0; 1233 final long ident = Binder.clearCallingIdentity(); 1234 UserInfo userInfo = null; 1235 final int userId; 1236 try { 1237 synchronized (mInstallLock) { 1238 synchronized (mPackagesLock) { 1239 UserInfo parent = null; 1240 if (parentId != UserHandle.USER_NULL) { 1241 parent = getUserInfoLocked(parentId); 1242 if (parent == null) return null; 1243 } 1244 if (isManagedProfile && !canAddMoreManagedProfiles(parentId)) { 1245 Log.e(LOG_TAG, "Cannot add more managed profiles for user " + parentId); 1246 return null; 1247 } 1248 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1249 // If we're not adding a guest user or a managed profile and the limit has 1250 // been reached, cannot add a user. 1251 return null; 1252 } 1253 // If we're adding a guest and there already exists one, bail. 1254 if (isGuest && findCurrentGuestUserLocked() != null) { 1255 return null; 1256 } 1257 // In legacy mode, restricted profile's parent can only be the owner user 1258 if (isRestricted && !UserManager.isSplitSystemUser() 1259 && (parentId != UserHandle.USER_SYSTEM)) { 1260 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1261 return null; 1262 } 1263 if (isRestricted && UserManager.isSplitSystemUser()) { 1264 if (parent == null) { 1265 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be " 1266 + "specified"); 1267 return null; 1268 } 1269 if (!parent.canHaveProfile()) { 1270 Log.w(LOG_TAG, "Cannot add restricted profile - profiles cannot be " 1271 + "created for the specified parent user id " + parentId); 1272 return null; 1273 } 1274 } 1275 // In split system user mode, we assign the first human user the primary flag. 1276 // And if there is no device owner, we also assign the admin flag to primary 1277 // user. 1278 if (UserManager.isSplitSystemUser() 1279 && !isGuest && !isManagedProfile && getPrimaryUser() == null) { 1280 flags |= UserInfo.FLAG_PRIMARY; 1281 DevicePolicyManager devicePolicyManager = (DevicePolicyManager) 1282 mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); 1283 if (devicePolicyManager == null 1284 || devicePolicyManager.getDeviceOwner() == null) { 1285 flags |= UserInfo.FLAG_ADMIN; 1286 } 1287 } 1288 userId = getNextAvailableIdLocked(); 1289 userInfo = new UserInfo(userId, name, null, flags); 1290 userInfo.serialNumber = mNextSerialNumber++; 1291 long now = System.currentTimeMillis(); 1292 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1293 userInfo.partial = true; 1294 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1295 mUsers.put(userId, userInfo); 1296 writeUserListLocked(); 1297 if (parent != null) { 1298 if (isManagedProfile) { 1299 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1300 parent.profileGroupId = parent.id; 1301 scheduleWriteUserLocked(parent); 1302 } 1303 userInfo.profileGroupId = parent.profileGroupId; 1304 } else if (isRestricted) { 1305 if (!parent.canHaveProfile()) { 1306 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1307 } 1308 if (parent.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID) { 1309 parent.restrictedProfileParentId = parent.id; 1310 scheduleWriteUserLocked(parent); 1311 } 1312 userInfo.restrictedProfileParentId = parent.restrictedProfileParentId; 1313 } 1314 } 1315 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1316 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1317 final String volumeUuid = vol.getFsUuid(); 1318 try { 1319 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1320 userId); 1321 prepareUserDirectory(mContext, volumeUuid, userId); 1322 enforceSerialNumber(userDir, userInfo.serialNumber); 1323 } catch (IOException e) { 1324 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1325 } 1326 } 1327 mPm.createNewUserLILPw(userId); 1328 userInfo.partial = false; 1329 scheduleWriteUserLocked(userInfo); 1330 updateUserIdsLocked(); 1331 Bundle restrictions = new Bundle(); 1332 mUserRestrictions.append(userId, restrictions); 1333 } 1334 } 1335 mPm.newUserCreated(userId); 1336 if (userInfo != null) { 1337 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1338 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1339 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1340 android.Manifest.permission.MANAGE_USERS); 1341 } 1342 } finally { 1343 Binder.restoreCallingIdentity(ident); 1344 } 1345 return userInfo; 1346 } 1347 1348 /** 1349 * @hide 1350 */ 1351 public UserInfo createRestrictedProfile(String name, int parentUserId) { 1352 checkManageUsersPermission("setupRestrictedProfile"); 1353 final UserInfo user = createProfileForUser(name, UserInfo.FLAG_RESTRICTED, parentUserId); 1354 if (user == null) { 1355 return null; 1356 } 1357 setUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS, true, user.id); 1358 // Change the setting before applying the DISALLOW_SHARE_LOCATION restriction, otherwise 1359 // the putIntForUser() will fail. 1360 android.provider.Settings.Secure.putIntForUser(mContext.getContentResolver(), 1361 android.provider.Settings.Secure.LOCATION_MODE, 1362 android.provider.Settings.Secure.LOCATION_MODE_OFF, user.id); 1363 setUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, true, user.id); 1364 return user; 1365 } 1366 1367 /** 1368 * Find the current guest user. If the Guest user is partial, 1369 * then do not include it in the results as it is about to die. 1370 */ 1371 private UserInfo findCurrentGuestUserLocked() { 1372 final int size = mUsers.size(); 1373 for (int i = 0; i < size; i++) { 1374 final UserInfo user = mUsers.valueAt(i); 1375 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1376 return user; 1377 } 1378 } 1379 return null; 1380 } 1381 1382 /** 1383 * Mark this guest user for deletion to allow us to create another guest 1384 * and switch to that user before actually removing this guest. 1385 * @param userHandle the userid of the current guest 1386 * @return whether the user could be marked for deletion 1387 */ 1388 public boolean markGuestForDeletion(int userHandle) { 1389 checkManageUsersPermission("Only the system can remove users"); 1390 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1391 UserManager.DISALLOW_REMOVE_USER, false)) { 1392 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1393 return false; 1394 } 1395 1396 long ident = Binder.clearCallingIdentity(); 1397 try { 1398 final UserInfo user; 1399 synchronized (mPackagesLock) { 1400 user = mUsers.get(userHandle); 1401 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1402 return false; 1403 } 1404 if (!user.isGuest()) { 1405 return false; 1406 } 1407 // We set this to a guest user that is to be removed. This is a temporary state 1408 // where we are allowed to add new Guest users, even if this one is still not 1409 // removed. This user will still show up in getUserInfo() calls. 1410 // If we don't get around to removing this Guest user, it will be purged on next 1411 // startup. 1412 user.guestToRemove = true; 1413 // Mark it as disabled, so that it isn't returned any more when 1414 // profiles are queried. 1415 user.flags |= UserInfo.FLAG_DISABLED; 1416 writeUserLocked(user); 1417 } 1418 } finally { 1419 Binder.restoreCallingIdentity(ident); 1420 } 1421 return true; 1422 } 1423 1424 /** 1425 * Removes a user and all data directories created for that user. This method should be called 1426 * after the user's processes have been terminated. 1427 * @param userHandle the user's id 1428 */ 1429 public boolean removeUser(int userHandle) { 1430 checkManageUsersPermission("Only the system can remove users"); 1431 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1432 UserManager.DISALLOW_REMOVE_USER, false)) { 1433 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1434 return false; 1435 } 1436 1437 long ident = Binder.clearCallingIdentity(); 1438 try { 1439 final UserInfo user; 1440 int currentUser = ActivityManager.getCurrentUser(); 1441 if (currentUser == userHandle) { 1442 Log.w(LOG_TAG, "Current user cannot be removed"); 1443 return false; 1444 } 1445 synchronized (mPackagesLock) { 1446 user = mUsers.get(userHandle); 1447 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1448 return false; 1449 } 1450 1451 // We remember deleted user IDs to prevent them from being 1452 // reused during the current boot; they can still be reused 1453 // after a reboot. 1454 mRemovingUserIds.put(userHandle, true); 1455 1456 try { 1457 mAppOpsService.removeUser(userHandle); 1458 } catch (RemoteException e) { 1459 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1460 } 1461 // Set this to a partially created user, so that the user will be purged 1462 // on next startup, in case the runtime stops now before stopping and 1463 // removing the user completely. 1464 user.partial = true; 1465 // Mark it as disabled, so that it isn't returned any more when 1466 // profiles are queried. 1467 user.flags |= UserInfo.FLAG_DISABLED; 1468 writeUserLocked(user); 1469 } 1470 1471 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1472 && user.isManagedProfile()) { 1473 // Send broadcast to notify system that the user removed was a 1474 // managed user. 1475 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1476 } 1477 1478 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1479 int res; 1480 try { 1481 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1482 new IStopUserCallback.Stub() { 1483 @Override 1484 public void userStopped(int userId) { 1485 finishRemoveUser(userId); 1486 } 1487 @Override 1488 public void userStopAborted(int userId) { 1489 } 1490 }); 1491 } catch (RemoteException e) { 1492 return false; 1493 } 1494 return res == ActivityManager.USER_OP_SUCCESS; 1495 } finally { 1496 Binder.restoreCallingIdentity(ident); 1497 } 1498 } 1499 1500 void finishRemoveUser(final int userHandle) { 1501 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1502 // Let other services shutdown any activity and clean up their state before completely 1503 // wiping the user's system directory and removing from the user list 1504 long ident = Binder.clearCallingIdentity(); 1505 try { 1506 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1507 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1508 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1509 android.Manifest.permission.MANAGE_USERS, 1510 1511 new BroadcastReceiver() { 1512 @Override 1513 public void onReceive(Context context, Intent intent) { 1514 if (DBG) { 1515 Slog.i(LOG_TAG, 1516 "USER_REMOVED broadcast sent, cleaning up user data " 1517 + userHandle); 1518 } 1519 new Thread() { 1520 public void run() { 1521 // Clean up any ActivityManager state 1522 LocalServices.getService(ActivityManagerInternal.class) 1523 .onUserRemoved(userHandle); 1524 synchronized (mInstallLock) { 1525 synchronized (mPackagesLock) { 1526 removeUserStateLocked(userHandle); 1527 } 1528 } 1529 } 1530 }.start(); 1531 } 1532 }, 1533 1534 null, Activity.RESULT_OK, null, null); 1535 } finally { 1536 Binder.restoreCallingIdentity(ident); 1537 } 1538 } 1539 1540 private void removeUserStateLocked(final int userHandle) { 1541 mContext.getSystemService(StorageManager.class) 1542 .deleteUserKey(userHandle); 1543 // Cleanup package manager settings 1544 mPm.cleanUpUserLILPw(this, userHandle); 1545 1546 // Remove this user from the list 1547 mUsers.remove(userHandle); 1548 // Remove user file 1549 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1550 userFile.delete(); 1551 // Update the user list 1552 writeUserListLocked(); 1553 updateUserIdsLocked(); 1554 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1555 } 1556 1557 private void removeDirectoryRecursive(File parent) { 1558 if (parent.isDirectory()) { 1559 String[] files = parent.list(); 1560 for (String filename : files) { 1561 File child = new File(parent, filename); 1562 removeDirectoryRecursive(child); 1563 } 1564 } 1565 parent.delete(); 1566 } 1567 1568 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1569 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1570 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1571 Intent.FLAG_RECEIVER_FOREGROUND); 1572 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1573 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1574 } 1575 1576 @Override 1577 public Bundle getApplicationRestrictions(String packageName) { 1578 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1579 } 1580 1581 @Override 1582 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1583 if (UserHandle.getCallingUserId() != userId 1584 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1585 checkManageUsersPermission("get application restrictions for other users/apps"); 1586 } 1587 synchronized (mPackagesLock) { 1588 // Read the restrictions from XML 1589 return readApplicationRestrictionsLocked(packageName, userId); 1590 } 1591 } 1592 1593 @Override 1594 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1595 int userId) { 1596 checkManageUsersPermission("set application restrictions"); 1597 synchronized (mPackagesLock) { 1598 if (restrictions == null || restrictions.isEmpty()) { 1599 cleanAppRestrictionsForPackage(packageName, userId); 1600 } else { 1601 // Write the restrictions to XML 1602 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1603 } 1604 } 1605 1606 if (isPackageInstalled(packageName, userId)) { 1607 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1608 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1609 changeIntent.setPackage(packageName); 1610 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1611 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1612 } 1613 } 1614 1615 @Override 1616 public void removeRestrictions() { 1617 checkManageUsersPermission("remove restrictions"); 1618 final int userHandle = UserHandle.getCallingUserId(); 1619 removeRestrictionsForUser(userHandle, true); 1620 } 1621 1622 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1623 synchronized (mPackagesLock) { 1624 // Remove all user restrictions 1625 setUserRestrictions(new Bundle(), userHandle); 1626 // Remove any app restrictions 1627 cleanAppRestrictions(userHandle); 1628 } 1629 if (unhideApps) { 1630 unhideAllInstalledAppsForUser(userHandle); 1631 } 1632 } 1633 1634 private void unhideAllInstalledAppsForUser(final int userHandle) { 1635 mHandler.post(new Runnable() { 1636 @Override 1637 public void run() { 1638 List<ApplicationInfo> apps = 1639 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1640 userHandle).getList(); 1641 final long ident = Binder.clearCallingIdentity(); 1642 try { 1643 for (ApplicationInfo appInfo : apps) { 1644 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1645 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1646 != 0) { 1647 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1648 userHandle); 1649 } 1650 } 1651 } finally { 1652 Binder.restoreCallingIdentity(ident); 1653 } 1654 } 1655 }); 1656 } 1657 private int getUidForPackage(String packageName) { 1658 long ident = Binder.clearCallingIdentity(); 1659 try { 1660 return mContext.getPackageManager().getApplicationInfo(packageName, 1661 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1662 } catch (NameNotFoundException nnfe) { 1663 return -1; 1664 } finally { 1665 Binder.restoreCallingIdentity(ident); 1666 } 1667 } 1668 1669 private Bundle readApplicationRestrictionsLocked(String packageName, 1670 int userId) { 1671 AtomicFile restrictionsFile = 1672 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1673 packageToRestrictionsFileName(packageName))); 1674 return readApplicationRestrictionsLocked(restrictionsFile); 1675 } 1676 1677 @VisibleForTesting 1678 static Bundle readApplicationRestrictionsLocked(AtomicFile restrictionsFile) { 1679 final Bundle restrictions = new Bundle(); 1680 final ArrayList<String> values = new ArrayList<>(); 1681 if (!restrictionsFile.getBaseFile().exists()) { 1682 return restrictions; 1683 } 1684 1685 FileInputStream fis = null; 1686 try { 1687 fis = restrictionsFile.openRead(); 1688 XmlPullParser parser = Xml.newPullParser(); 1689 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1690 XmlUtils.nextElement(parser); 1691 if (parser.getEventType() != XmlPullParser.START_TAG) { 1692 Slog.e(LOG_TAG, "Unable to read restrictions file " 1693 + restrictionsFile.getBaseFile()); 1694 return restrictions; 1695 } 1696 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1697 readEntry(restrictions, values, parser); 1698 } 1699 } catch (IOException|XmlPullParserException e) { 1700 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1701 } finally { 1702 IoUtils.closeQuietly(fis); 1703 } 1704 return restrictions; 1705 } 1706 1707 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1708 XmlPullParser parser) throws XmlPullParserException, IOException { 1709 int type = parser.getEventType(); 1710 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1711 String key = parser.getAttributeValue(null, ATTR_KEY); 1712 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1713 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1714 if (multiple != null) { 1715 values.clear(); 1716 int count = Integer.parseInt(multiple); 1717 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1718 if (type == XmlPullParser.START_TAG 1719 && parser.getName().equals(TAG_VALUE)) { 1720 values.add(parser.nextText().trim()); 1721 count--; 1722 } 1723 } 1724 String [] valueStrings = new String[values.size()]; 1725 values.toArray(valueStrings); 1726 restrictions.putStringArray(key, valueStrings); 1727 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1728 restrictions.putBundle(key, readBundleEntry(parser, values)); 1729 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1730 final int outerDepth = parser.getDepth(); 1731 ArrayList<Bundle> bundleList = new ArrayList<>(); 1732 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1733 Bundle childBundle = readBundleEntry(parser, values); 1734 bundleList.add(childBundle); 1735 } 1736 restrictions.putParcelableArray(key, 1737 bundleList.toArray(new Bundle[bundleList.size()])); 1738 } else { 1739 String value = parser.nextText().trim(); 1740 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1741 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1742 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1743 restrictions.putInt(key, Integer.parseInt(value)); 1744 } else { 1745 restrictions.putString(key, value); 1746 } 1747 } 1748 } 1749 } 1750 1751 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1752 throws IOException, XmlPullParserException { 1753 Bundle childBundle = new Bundle(); 1754 final int outerDepth = parser.getDepth(); 1755 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1756 readEntry(childBundle, values, parser); 1757 } 1758 return childBundle; 1759 } 1760 1761 private void writeApplicationRestrictionsLocked(String packageName, 1762 Bundle restrictions, int userId) { 1763 AtomicFile restrictionsFile = new AtomicFile( 1764 new File(Environment.getUserSystemDirectory(userId), 1765 packageToRestrictionsFileName(packageName))); 1766 writeApplicationRestrictionsLocked(restrictions, restrictionsFile); 1767 } 1768 1769 @VisibleForTesting 1770 static void writeApplicationRestrictionsLocked(Bundle restrictions, 1771 AtomicFile restrictionsFile) { 1772 FileOutputStream fos = null; 1773 try { 1774 fos = restrictionsFile.startWrite(); 1775 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1776 1777 final XmlSerializer serializer = new FastXmlSerializer(); 1778 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1779 serializer.startDocument(null, true); 1780 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1781 1782 serializer.startTag(null, TAG_RESTRICTIONS); 1783 writeBundle(restrictions, serializer); 1784 serializer.endTag(null, TAG_RESTRICTIONS); 1785 1786 serializer.endDocument(); 1787 restrictionsFile.finishWrite(fos); 1788 } catch (Exception e) { 1789 restrictionsFile.failWrite(fos); 1790 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 1791 } 1792 } 1793 1794 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1795 throws IOException { 1796 for (String key : restrictions.keySet()) { 1797 Object value = restrictions.get(key); 1798 serializer.startTag(null, TAG_ENTRY); 1799 serializer.attribute(null, ATTR_KEY, key); 1800 1801 if (value instanceof Boolean) { 1802 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1803 serializer.text(value.toString()); 1804 } else if (value instanceof Integer) { 1805 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1806 serializer.text(value.toString()); 1807 } else if (value == null || value instanceof String) { 1808 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1809 serializer.text(value != null ? (String) value : ""); 1810 } else if (value instanceof Bundle) { 1811 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1812 writeBundle((Bundle) value, serializer); 1813 } else if (value instanceof Parcelable[]) { 1814 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 1815 Parcelable[] array = (Parcelable[]) value; 1816 for (Parcelable parcelable : array) { 1817 if (!(parcelable instanceof Bundle)) { 1818 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 1819 } 1820 serializer.startTag(null, TAG_ENTRY); 1821 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1822 writeBundle((Bundle) parcelable, serializer); 1823 serializer.endTag(null, TAG_ENTRY); 1824 } 1825 } else { 1826 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1827 String[] values = (String[]) value; 1828 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1829 for (String choice : values) { 1830 serializer.startTag(null, TAG_VALUE); 1831 serializer.text(choice != null ? choice : ""); 1832 serializer.endTag(null, TAG_VALUE); 1833 } 1834 } 1835 serializer.endTag(null, TAG_ENTRY); 1836 } 1837 } 1838 1839 @Override 1840 public int getUserSerialNumber(int userHandle) { 1841 synchronized (mPackagesLock) { 1842 if (!exists(userHandle)) return -1; 1843 return getUserInfoLocked(userHandle).serialNumber; 1844 } 1845 } 1846 1847 @Override 1848 public int getUserHandle(int userSerialNumber) { 1849 synchronized (mPackagesLock) { 1850 for (int userId : mUserIds) { 1851 UserInfo info = getUserInfoLocked(userId); 1852 if (info != null && info.serialNumber == userSerialNumber) return userId; 1853 } 1854 // Not found 1855 return -1; 1856 } 1857 } 1858 1859 @Override 1860 public long getUserCreationTime(int userHandle) { 1861 int callingUserId = UserHandle.getCallingUserId(); 1862 UserInfo userInfo = null; 1863 synchronized (mPackagesLock) { 1864 if (callingUserId == userHandle) { 1865 userInfo = getUserInfoLocked(userHandle); 1866 } else { 1867 UserInfo parent = getProfileParentLocked(userHandle); 1868 if (parent != null && parent.id == callingUserId) { 1869 userInfo = getUserInfoLocked(userHandle); 1870 } 1871 } 1872 } 1873 if (userInfo == null) { 1874 throw new SecurityException("userHandle can only be the calling user or a managed " 1875 + "profile associated with this user"); 1876 } 1877 return userInfo.creationTime; 1878 } 1879 1880 /** 1881 * Caches the list of user ids in an array, adjusting the array size when necessary. 1882 */ 1883 private void updateUserIdsLocked() { 1884 int num = 0; 1885 final int userSize = mUsers.size(); 1886 for (int i = 0; i < userSize; i++) { 1887 if (!mUsers.valueAt(i).partial) { 1888 num++; 1889 } 1890 } 1891 final int[] newUsers = new int[num]; 1892 int n = 0; 1893 for (int i = 0; i < userSize; i++) { 1894 if (!mUsers.valueAt(i).partial) { 1895 newUsers[n++] = mUsers.keyAt(i); 1896 } 1897 } 1898 mUserIds = newUsers; 1899 } 1900 1901 /** 1902 * Make a note of the last started time of a user and do some cleanup. 1903 * @param userId the user that was just foregrounded 1904 */ 1905 public void onUserForeground(int userId) { 1906 synchronized (mPackagesLock) { 1907 UserInfo user = mUsers.get(userId); 1908 long now = System.currentTimeMillis(); 1909 if (user == null || user.partial) { 1910 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1911 return; 1912 } 1913 if (now > EPOCH_PLUS_30_YEARS) { 1914 user.lastLoggedInTime = now; 1915 scheduleWriteUserLocked(user); 1916 } 1917 } 1918 } 1919 1920 /** 1921 * Returns the next available user id, filling in any holes in the ids. 1922 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1923 * for data and battery stats collection, or unexpected cross-talk. 1924 * @return 1925 */ 1926 private int getNextAvailableIdLocked() { 1927 synchronized (mPackagesLock) { 1928 int i = MIN_USER_ID; 1929 while (i < MAX_USER_ID) { 1930 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1931 return i; 1932 } 1933 i++; 1934 } 1935 } 1936 throw new IllegalStateException("No user id available!"); 1937 } 1938 1939 private String packageToRestrictionsFileName(String packageName) { 1940 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1941 } 1942 1943 /** 1944 * Create new {@code /data/user/[id]} directory and sets default 1945 * permissions. 1946 */ 1947 public static void prepareUserDirectory(Context context, String volumeUuid, int userId) { 1948 final StorageManager storage = context.getSystemService(StorageManager.class); 1949 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 1950 storage.createNewUserDir(userId, userDir); 1951 } 1952 1953 /** 1954 * Enforce that serial number stored in user directory inode matches the 1955 * given expected value. Gracefully sets the serial number if currently 1956 * undefined. 1957 * 1958 * @throws IOException when problem extracting serial number, or serial 1959 * number is mismatched. 1960 */ 1961 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 1962 final int foundSerial = getSerialNumber(file); 1963 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 1964 1965 if (foundSerial == -1) { 1966 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 1967 try { 1968 setSerialNumber(file, serialNumber); 1969 } catch (IOException e) { 1970 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 1971 } 1972 1973 } else if (foundSerial != serialNumber) { 1974 throw new IOException("Found serial number " + foundSerial 1975 + " doesn't match expected " + serialNumber); 1976 } 1977 } 1978 1979 /** 1980 * Set serial number stored in user directory inode. 1981 * 1982 * @throws IOException if serial number was already set 1983 */ 1984 private static void setSerialNumber(File file, int serialNumber) 1985 throws IOException { 1986 try { 1987 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 1988 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 1989 } catch (ErrnoException e) { 1990 throw e.rethrowAsIOException(); 1991 } 1992 } 1993 1994 /** 1995 * Return serial number stored in user directory inode. 1996 * 1997 * @return parsed serial number, or -1 if not set 1998 */ 1999 private static int getSerialNumber(File file) throws IOException { 2000 try { 2001 final byte[] buf = new byte[256]; 2002 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 2003 final String serial = new String(buf, 0, len); 2004 try { 2005 return Integer.parseInt(serial); 2006 } catch (NumberFormatException e) { 2007 throw new IOException("Bad serial number: " + serial); 2008 } 2009 } catch (ErrnoException e) { 2010 if (e.errno == OsConstants.ENODATA) { 2011 return -1; 2012 } else { 2013 throw e.rethrowAsIOException(); 2014 } 2015 } 2016 } 2017 2018 @Override 2019 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2020 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 2021 != PackageManager.PERMISSION_GRANTED) { 2022 pw.println("Permission Denial: can't dump UserManager from from pid=" 2023 + Binder.getCallingPid() 2024 + ", uid=" + Binder.getCallingUid() 2025 + " without permission " 2026 + android.Manifest.permission.DUMP); 2027 return; 2028 } 2029 2030 long now = System.currentTimeMillis(); 2031 StringBuilder sb = new StringBuilder(); 2032 synchronized (mPackagesLock) { 2033 pw.println("Users:"); 2034 for (int i = 0; i < mUsers.size(); i++) { 2035 UserInfo user = mUsers.valueAt(i); 2036 if (user == null) continue; 2037 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 2038 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 2039 if (user.partial) pw.print(" <partial>"); 2040 pw.println(); 2041 pw.print(" Created: "); 2042 if (user.creationTime == 0) { 2043 pw.println("<unknown>"); 2044 } else { 2045 sb.setLength(0); 2046 TimeUtils.formatDuration(now - user.creationTime, sb); 2047 sb.append(" ago"); 2048 pw.println(sb); 2049 } 2050 pw.print(" Last logged in: "); 2051 if (user.lastLoggedInTime == 0) { 2052 pw.println("<unknown>"); 2053 } else { 2054 sb.setLength(0); 2055 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2056 sb.append(" ago"); 2057 pw.println(sb); 2058 } 2059 pw.println(" Restrictions:"); 2060 UserRestrictionsUtils.dumpRestrictions( 2061 pw, " ", mUserRestrictions.get(user.id)); 2062 } 2063 pw.println(); 2064 pw.println("Guest restrictions:"); 2065 UserRestrictionsUtils.dumpRestrictions(pw, " ", mGuestRestrictions); 2066 } 2067 } 2068 2069 final class MainHandler extends Handler { 2070 2071 @Override 2072 public void handleMessage(Message msg) { 2073 switch (msg.what) { 2074 case WRITE_USER_MSG: 2075 removeMessages(WRITE_USER_MSG, msg.obj); 2076 synchronized (mPackagesLock) { 2077 int userId = ((UserInfo) msg.obj).id; 2078 UserInfo userInfo = mUsers.get(userId); 2079 if (userInfo != null) { 2080 writeUserLocked(userInfo); 2081 } 2082 } 2083 } 2084 } 2085 } 2086 2087 /** 2088 * @param userId 2089 * @return whether the user has been initialized yet 2090 */ 2091 boolean isInitialized(int userId) { 2092 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2093 } 2094} 2095