UserManagerService.java revision 068c54a5be697c3df4657dcda33cd17c4b547710
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.annotation.NonNull; 20import android.annotation.Nullable; 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.app.admin.DevicePolicyManagerInternal; 28import android.content.BroadcastReceiver; 29import android.content.Context; 30import android.content.Intent; 31import android.content.pm.ApplicationInfo; 32import android.content.pm.PackageManager; 33import android.content.pm.PackageManager.NameNotFoundException; 34import android.content.pm.UserInfo; 35import android.graphics.Bitmap; 36import android.os.Binder; 37import android.os.Bundle; 38import android.os.Environment; 39import android.os.FileUtils; 40import android.os.Handler; 41import android.os.IUserManager; 42import android.os.Message; 43import android.os.ParcelFileDescriptor; 44import android.os.Parcelable; 45import android.os.Process; 46import android.os.RemoteException; 47import android.os.ServiceManager; 48import android.os.UserHandle; 49import android.os.UserManager; 50import android.os.UserManagerInternal; 51import android.os.storage.StorageManager; 52import android.os.storage.VolumeInfo; 53import android.system.ErrnoException; 54import android.system.Os; 55import android.system.OsConstants; 56import android.util.AtomicFile; 57import android.util.Log; 58import android.util.Slog; 59import android.util.SparseArray; 60import android.util.SparseBooleanArray; 61import android.util.TimeUtils; 62import android.util.Xml; 63 64import com.android.internal.annotations.GuardedBy; 65import com.android.internal.annotations.VisibleForTesting; 66import com.android.internal.app.IAppOpsService; 67import com.android.internal.util.FastXmlSerializer; 68import com.android.internal.util.Preconditions; 69import com.android.internal.util.XmlUtils; 70import com.android.server.LocalServices; 71 72import org.xmlpull.v1.XmlPullParser; 73import org.xmlpull.v1.XmlPullParserException; 74import org.xmlpull.v1.XmlSerializer; 75 76import java.io.BufferedOutputStream; 77import java.io.File; 78import java.io.FileDescriptor; 79import java.io.FileInputStream; 80import java.io.FileNotFoundException; 81import java.io.FileOutputStream; 82import java.io.IOException; 83import java.io.PrintWriter; 84import java.nio.charset.StandardCharsets; 85import java.util.ArrayList; 86import java.util.List; 87 88import libcore.io.IoUtils; 89 90/** 91 * Service for {@link UserManager}. 92 * 93 * Method naming convention: 94 * - Methods suffixed with "Locked" should be called within the {@code this} lock. 95 * - Methods suffixed with "RL" should be called within the {@link #mRestrictionsLock} lock. 96 */ 97public class UserManagerService extends IUserManager.Stub { 98 99 private static final String LOG_TAG = "UserManagerService"; 100 101 private static final boolean DBG = false; // DO NOT SUBMIT WITH TRUE 102 103 private static final String TAG_NAME = "name"; 104 private static final String ATTR_FLAGS = "flags"; 105 private static final String ATTR_ICON_PATH = "icon"; 106 private static final String ATTR_ID = "id"; 107 private static final String ATTR_CREATION_TIME = "created"; 108 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 109 private static final String ATTR_SERIAL_NO = "serialNumber"; 110 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 111 private static final String ATTR_PARTIAL = "partial"; 112 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 113 private static final String ATTR_USER_VERSION = "version"; 114 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 115 private static final String ATTR_RESTRICTED_PROFILE_PARENT_ID = "restrictedProfileParentId"; 116 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 117 private static final String TAG_USERS = "users"; 118 private static final String TAG_USER = "user"; 119 private static final String TAG_RESTRICTIONS = "restrictions"; 120 private static final String TAG_ENTRY = "entry"; 121 private static final String TAG_VALUE = "value"; 122 private static final String ATTR_KEY = "key"; 123 private static final String ATTR_VALUE_TYPE = "type"; 124 private static final String ATTR_MULTIPLE = "m"; 125 126 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 127 private static final String ATTR_TYPE_STRING = "s"; 128 private static final String ATTR_TYPE_BOOLEAN = "b"; 129 private static final String ATTR_TYPE_INTEGER = "i"; 130 private static final String ATTR_TYPE_BUNDLE = "B"; 131 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 132 133 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 134 private static final String USER_LIST_FILENAME = "userlist.xml"; 135 private static final String USER_PHOTO_FILENAME = "photo.png"; 136 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 137 138 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 139 private static final String XML_SUFFIX = ".xml"; 140 141 private static final int MIN_USER_ID = 10; 142 // We need to keep process uid within Integer.MAX_VALUE. 143 private static final int MAX_USER_ID = Integer.MAX_VALUE / UserHandle.PER_USER_RANGE; 144 145 private static final int USER_VERSION = 6; 146 147 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 148 149 // Maximum number of managed profiles permitted per user is 1. This cannot be increased 150 // without first making sure that the rest of the framework is prepared for it. 151 private static final int MAX_MANAGED_PROFILES = 1; 152 153 /** 154 * Flag indicating whether device credentials are shared among same-user profiles. 155 */ 156 private static final boolean CONFIG_PROFILES_SHARE_CREDENTIAL = true; 157 158 static final int WRITE_USER_MSG = 1; 159 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 160 161 private static final String XATTR_SERIAL = "user.serial"; 162 163 private final Context mContext; 164 private final PackageManagerService mPm; 165 private final Object mInstallLock; 166 private final Object mPackagesLock; 167 168 private final Handler mHandler; 169 170 private final File mUsersDir; 171 private final File mUserListFile; 172 173 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 174 175 private final Object mRestrictionsLock = new Object(); 176 177 /** 178 * User restrictions set via UserManager. This doesn't include restrictions set by 179 * device owner / profile owners. 180 * 181 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 182 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 183 * maybe shared between {@link #mBaseUserRestrictions} and 184 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 185 * (Otherwise we won't be able to detect what restrictions have changed in 186 * {@link #updateUserRestrictionsInternalRL). 187 */ 188 @GuardedBy("mRestrictionsLock") 189 private final SparseArray<Bundle> mBaseUserRestrictions = new SparseArray<>(); 190 191 /** 192 * Cached user restrictions that are in effect -- i.e. {@link #mBaseUserRestrictions} combined 193 * with device / profile owner restrictions. We'll initialize it lazily; use 194 * {@link #getEffectiveUserRestrictions} to access it. 195 * 196 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 197 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 198 * maybe shared between {@link #mBaseUserRestrictions} and 199 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 200 * (Otherwise we won't be able to detect what restrictions have changed in 201 * {@link #updateUserRestrictionsInternalRL). 202 */ 203 @GuardedBy("mRestrictionsLock") 204 private final SparseArray<Bundle> mCachedEffectiveUserRestrictions = new SparseArray<>(); 205 206 private final Bundle mGuestRestrictions = new Bundle(); 207 208 /** 209 * Set of user IDs being actively removed. Removed IDs linger in this set 210 * for several seconds to work around a VFS caching issue. 211 */ 212 // @GuardedBy("mPackagesLock") 213 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 214 215 private int[] mUserIds; 216 private int mNextSerialNumber; 217 private int mUserVersion = 0; 218 219 private IAppOpsService mAppOpsService; 220 221 private final LocalService mLocalService; 222 223 private static UserManagerService sInstance; 224 225 public static UserManagerService getInstance() { 226 synchronized (UserManagerService.class) { 227 return sInstance; 228 } 229 } 230 231 /** 232 * Available for testing purposes. 233 */ 234 UserManagerService(File dataDir, File baseUserPath) { 235 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 236 } 237 238 /** 239 * Called by package manager to create the service. This is closely 240 * associated with the package manager, and the given lock is the 241 * package manager's own lock. 242 */ 243 UserManagerService(Context context, PackageManagerService pm, 244 Object installLock, Object packagesLock) { 245 this(context, pm, installLock, packagesLock, 246 Environment.getDataDirectory(), 247 new File(Environment.getDataDirectory(), "user")); 248 } 249 250 /** 251 * Available for testing purposes. 252 */ 253 private UserManagerService(Context context, PackageManagerService pm, 254 Object installLock, Object packagesLock, 255 File dataDir, File baseUserPath) { 256 mContext = context; 257 mPm = pm; 258 mInstallLock = installLock; 259 mPackagesLock = packagesLock; 260 mHandler = new MainHandler(); 261 synchronized (mInstallLock) { 262 synchronized (mPackagesLock) { 263 mUsersDir = new File(dataDir, USER_INFO_DIR); 264 mUsersDir.mkdirs(); 265 // Make zeroth user directory, for services to migrate their files to that location 266 File userZeroDir = new File(mUsersDir, String.valueOf(UserHandle.USER_SYSTEM)); 267 userZeroDir.mkdirs(); 268 FileUtils.setPermissions(mUsersDir.toString(), 269 FileUtils.S_IRWXU|FileUtils.S_IRWXG 270 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 271 -1, -1); 272 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 273 initDefaultGuestRestrictions(); 274 readUserListLocked(); 275 sInstance = this; 276 } 277 } 278 mLocalService = new LocalService(); 279 LocalServices.addService(UserManagerInternal.class, mLocalService); 280 } 281 282 void systemReady() { 283 synchronized (mInstallLock) { 284 synchronized (mPackagesLock) { 285 // Prune out any partially created/partially removed users. 286 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 287 final int userSize = mUsers.size(); 288 for (int i = 0; i < userSize; i++) { 289 UserInfo ui = mUsers.valueAt(i); 290 if ((ui.partial || ui.guestToRemove) && i != 0) { 291 partials.add(ui); 292 } 293 } 294 final int partialsSize = partials.size(); 295 for (int i = 0; i < partialsSize; i++) { 296 UserInfo ui = partials.get(i); 297 Slog.w(LOG_TAG, "Removing partially created user " + ui.id 298 + " (name=" + ui.name + ")"); 299 removeUserStateLocked(ui.id); 300 } 301 } 302 } 303 onUserForeground(UserHandle.USER_SYSTEM); 304 mAppOpsService = IAppOpsService.Stub.asInterface( 305 ServiceManager.getService(Context.APP_OPS_SERVICE)); 306 for (int i = 0; i < mUserIds.length; ++i) { 307 final int userId = mUserIds[i]; 308 try { 309 mAppOpsService.setUserRestrictions(getEffectiveUserRestrictions(userId), userId); 310 } catch (RemoteException e) { 311 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 312 } 313 } 314 } 315 316 @Override 317 public UserInfo getPrimaryUser() { 318 checkManageUsersPermission("query users"); 319 synchronized (mPackagesLock) { 320 final int userSize = mUsers.size(); 321 for (int i = 0; i < userSize; i++) { 322 UserInfo ui = mUsers.valueAt(i); 323 if (ui.isPrimary()) { 324 return ui; 325 } 326 } 327 } 328 return null; 329 } 330 331 @Override 332 public @NonNull List<UserInfo> getUsers(boolean excludeDying) { 333 checkManageUsersPermission("query users"); 334 synchronized (mPackagesLock) { 335 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 336 final int userSize = mUsers.size(); 337 for (int i = 0; i < userSize; i++) { 338 UserInfo ui = mUsers.valueAt(i); 339 if (ui.partial) { 340 continue; 341 } 342 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 343 users.add(ui); 344 } 345 } 346 return users; 347 } 348 } 349 350 @Override 351 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 352 if (userId != UserHandle.getCallingUserId()) { 353 checkManageUsersPermission("getting profiles related to user " + userId); 354 } 355 final long ident = Binder.clearCallingIdentity(); 356 try { 357 synchronized (mPackagesLock) { 358 return getProfilesLocked(userId, enabledOnly); 359 } 360 } finally { 361 Binder.restoreCallingIdentity(ident); 362 } 363 } 364 365 /** Assume permissions already checked and caller's identity cleared */ 366 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 367 UserInfo user = getUserInfoLocked(userId); 368 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 369 if (user == null) { 370 // Probably a dying user 371 return users; 372 } 373 final int userSize = mUsers.size(); 374 for (int i = 0; i < userSize; i++) { 375 UserInfo profile = mUsers.valueAt(i); 376 if (!isProfileOf(user, profile)) { 377 continue; 378 } 379 if (enabledOnly && !profile.isEnabled()) { 380 continue; 381 } 382 if (mRemovingUserIds.get(profile.id)) { 383 continue; 384 } 385 users.add(profile); 386 } 387 return users; 388 } 389 390 @Override 391 public int getCredentialOwnerProfile(int userHandle) { 392 checkManageUsersPermission("get the credential owner"); 393 if (CONFIG_PROFILES_SHARE_CREDENTIAL) { 394 synchronized (mPackagesLock) { 395 UserInfo profileParent = getProfileParentLocked(userHandle); 396 if (profileParent != null) { 397 return profileParent.id; 398 } 399 } 400 } 401 402 return userHandle; 403 } 404 405 @Override 406 public boolean isSameProfileGroup(int userId, int otherUserId) { 407 if (userId == otherUserId) return true; 408 checkManageUsersPermission("check if in the same profile group"); 409 synchronized (mPackagesLock) { 410 return isSameProfileGroupLocked(userId, otherUserId); 411 } 412 } 413 414 private boolean isSameProfileGroupLocked(int userId, int otherUserId) { 415 UserInfo userInfo = getUserInfoLocked(userId); 416 if (userInfo == null || userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 417 return false; 418 } 419 UserInfo otherUserInfo = getUserInfoLocked(otherUserId); 420 if (otherUserInfo == null || otherUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 421 return false; 422 } 423 return userInfo.profileGroupId == otherUserInfo.profileGroupId; 424 } 425 426 @Override 427 public UserInfo getProfileParent(int userHandle) { 428 checkManageUsersPermission("get the profile parent"); 429 synchronized (mPackagesLock) { 430 return getProfileParentLocked(userHandle); 431 } 432 } 433 434 private UserInfo getProfileParentLocked(int userHandle) { 435 UserInfo profile = getUserInfoLocked(userHandle); 436 if (profile == null) { 437 return null; 438 } 439 int parentUserId = profile.profileGroupId; 440 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 441 return null; 442 } else { 443 return getUserInfoLocked(parentUserId); 444 } 445 } 446 447 private boolean isProfileOf(UserInfo user, UserInfo profile) { 448 return user.id == profile.id || 449 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 450 && user.profileGroupId == profile.profileGroupId); 451 } 452 453 @Override 454 public void setUserEnabled(int userId) { 455 checkManageUsersPermission("enable user"); 456 synchronized (mPackagesLock) { 457 UserInfo info = getUserInfoLocked(userId); 458 if (info != null && !info.isEnabled()) { 459 info.flags ^= UserInfo.FLAG_DISABLED; 460 writeUserLocked(info); 461 } 462 } 463 } 464 465 @Override 466 public UserInfo getUserInfo(int userId) { 467 checkManageUsersPermission("query user"); 468 synchronized (mPackagesLock) { 469 return getUserInfoLocked(userId); 470 } 471 } 472 473 @Override 474 public boolean isRestricted() { 475 synchronized (mPackagesLock) { 476 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 477 } 478 } 479 480 @Override 481 public boolean canHaveRestrictedProfile(int userId) { 482 checkManageUsersPermission("canHaveRestrictedProfile"); 483 synchronized (mPackagesLock) { 484 final UserInfo userInfo = getUserInfoLocked(userId); 485 if (userInfo == null || !userInfo.canHaveProfile()) { 486 return false; 487 } 488 if (!userInfo.isAdmin()) { 489 return false; 490 } 491 } 492 DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService( 493 Context.DEVICE_POLICY_SERVICE); 494 // restricted profile can be created if there is no DO set and the admin user has no PO 495 return dpm.getDeviceOwner() == null && dpm.getProfileOwnerAsUser(userId) == null; 496 } 497 498 /* 499 * Should be locked on mUsers before calling this. 500 */ 501 private UserInfo getUserInfoLocked(int userId) { 502 UserInfo ui = mUsers.get(userId); 503 // If it is partial and not in the process of being removed, return as unknown user. 504 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 505 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 506 return null; 507 } 508 return ui; 509 } 510 511 /** Called by PackageManagerService */ 512 public boolean exists(int userId) { 513 synchronized (mPackagesLock) { 514 return mUsers.get(userId) != null; 515 } 516 } 517 518 @Override 519 public void setUserName(int userId, String name) { 520 checkManageUsersPermission("rename users"); 521 boolean changed = false; 522 synchronized (mPackagesLock) { 523 UserInfo info = mUsers.get(userId); 524 if (info == null || info.partial) { 525 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 526 return; 527 } 528 if (name != null && !name.equals(info.name)) { 529 info.name = name; 530 writeUserLocked(info); 531 changed = true; 532 } 533 } 534 if (changed) { 535 sendUserInfoChangedBroadcast(userId); 536 } 537 } 538 539 @Override 540 public void setUserIcon(int userId, Bitmap bitmap) { 541 checkManageUsersPermission("update users"); 542 long ident = Binder.clearCallingIdentity(); 543 try { 544 synchronized (mPackagesLock) { 545 UserInfo info = mUsers.get(userId); 546 if (info == null || info.partial) { 547 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 548 return; 549 } 550 writeBitmapLocked(info, bitmap); 551 writeUserLocked(info); 552 } 553 sendUserInfoChangedBroadcast(userId); 554 } finally { 555 Binder.restoreCallingIdentity(ident); 556 } 557 } 558 559 private void sendUserInfoChangedBroadcast(int userId) { 560 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 561 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 562 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 563 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 564 } 565 566 @Override 567 public ParcelFileDescriptor getUserIcon(int userId) { 568 String iconPath; 569 synchronized (mPackagesLock) { 570 UserInfo info = mUsers.get(userId); 571 if (info == null || info.partial) { 572 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 573 return null; 574 } 575 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 576 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 577 || callingGroupId != info.profileGroupId) { 578 checkManageUsersPermission("get the icon of a user who is not related"); 579 } 580 if (info.iconPath == null) { 581 return null; 582 } 583 iconPath = info.iconPath; 584 } 585 586 try { 587 return ParcelFileDescriptor.open( 588 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 589 } catch (FileNotFoundException e) { 590 Log.e(LOG_TAG, "Couldn't find icon file", e); 591 } 592 return null; 593 } 594 595 public void makeInitialized(int userId) { 596 checkManageUsersPermission("makeInitialized"); 597 synchronized (mPackagesLock) { 598 UserInfo info = mUsers.get(userId); 599 if (info == null || info.partial) { 600 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 601 } 602 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 603 info.flags |= UserInfo.FLAG_INITIALIZED; 604 scheduleWriteUserLocked(info); 605 } 606 } 607 } 608 609 /** 610 * If default guest restrictions haven't been initialized yet, add the basic 611 * restrictions. 612 */ 613 private void initDefaultGuestRestrictions() { 614 if (mGuestRestrictions.isEmpty()) { 615 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 616 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 617 } 618 } 619 620 @Override 621 public Bundle getDefaultGuestRestrictions() { 622 checkManageUsersPermission("getDefaultGuestRestrictions"); 623 synchronized (mPackagesLock) { 624 return new Bundle(mGuestRestrictions); 625 } 626 } 627 628 @Override 629 public void setDefaultGuestRestrictions(Bundle restrictions) { 630 checkManageUsersPermission("setDefaultGuestRestrictions"); 631 synchronized (mPackagesLock) { 632 mGuestRestrictions.clear(); 633 mGuestRestrictions.putAll(restrictions); 634 writeUserListLocked(); 635 } 636 } 637 638 @GuardedBy("mRestrictionsLock") 639 private Bundle computeEffectiveUserRestrictionsRL(int userId) { 640 final DevicePolicyManagerInternal dpmi = 641 LocalServices.getService(DevicePolicyManagerInternal.class); 642 final Bundle systemRestrictions = mBaseUserRestrictions.get(userId); 643 644 final Bundle effective; 645 if (dpmi == null) { 646 // TODO Make sure it's because DPMS is disabled and not because we called it too early. 647 effective = systemRestrictions; 648 } else { 649 effective = dpmi.getComposedUserRestrictions(userId, systemRestrictions); 650 } 651 return effective; 652 } 653 654 @GuardedBy("mRestrictionsLock") 655 private void invalidateEffectiveUserRestrictionsRL(int userId) { 656 if (DBG) { 657 Log.d(LOG_TAG, "invalidateEffectiveUserRestrictions userId=" + userId); 658 } 659 mCachedEffectiveUserRestrictions.remove(userId); 660 } 661 662 private Bundle getEffectiveUserRestrictions(int userId) { 663 synchronized (mRestrictionsLock) { 664 Bundle restrictions = mCachedEffectiveUserRestrictions.get(userId); 665 if (restrictions == null) { 666 restrictions = computeEffectiveUserRestrictionsRL(userId); 667 mCachedEffectiveUserRestrictions.put(userId, restrictions); 668 } 669 return restrictions; 670 } 671 } 672 673 /** @return a specific user restriction that's in effect currently. */ 674 @Override 675 public boolean hasUserRestriction(String restrictionKey, int userId) { 676 Bundle restrictions = getEffectiveUserRestrictions(userId); 677 return restrictions != null && restrictions.getBoolean(restrictionKey); 678 } 679 680 /** 681 * @return UserRestrictions that are in effect currently. This always returns a new 682 * {@link Bundle}. 683 */ 684 @Override 685 public Bundle getUserRestrictions(int userId) { 686 Bundle restrictions = getEffectiveUserRestrictions(userId); 687 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 688 } 689 690 @Override 691 public void setUserRestriction(String key, boolean value, int userId) { 692 checkManageUsersPermission("setUserRestriction"); 693 if (!UserRestrictionsUtils.SYSTEM_CONTROLLED_USER_RESTRICTIONS.contains(key)) { 694 setUserRestrictionNoCheck(key, value, userId); 695 } 696 } 697 698 @Override 699 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 700 checkSystemOrRoot("setSystemControlledUserRestriction"); 701 setUserRestrictionNoCheck(key, value, userId); 702 } 703 704 private void setUserRestrictionNoCheck(String key, boolean value, int userId) { 705 synchronized (mRestrictionsLock) { 706 // Note we can't modify Bundles stored in mBaseUserRestrictions directly, so create 707 // a copy. 708 final Bundle newRestrictions = new Bundle(); 709 UserRestrictionsUtils.merge(newRestrictions, mBaseUserRestrictions.get(userId)); 710 newRestrictions.putBoolean(key, value); 711 712 updateUserRestrictionsInternalRL(newRestrictions, userId); 713 } 714 } 715 716 /** 717 * Optionally updating user restrictions, calculate the effective user restrictions by 718 * consulting {@link com.android.server.devicepolicy.DevicePolicyManagerService} and also 719 * apply it to {@link com.android.server.AppOpsService}. 720 * TODO applyUserRestrictionsLocked() should also apply to system settings. 721 * 722 * @param newRestrictions User restrictions to set. If null, only the effective restrictions 723 * will be updated. Note don't pass an existing Bundle in {@link #mBaseUserRestrictions} 724 * or {@link #mCachedEffectiveUserRestrictions}; that'll most likely cause a sub 725 * @param userId target user ID. 726 */ 727 @GuardedBy("mRestrictionsLock") 728 private void updateUserRestrictionsInternalRL( 729 @Nullable Bundle newRestrictions, int userId) { 730 if (DBG) { 731 Log.d(LOG_TAG, "updateUserRestrictionsInternalLocked userId=" + userId 732 + " bundle=" + newRestrictions); 733 } 734 final Bundle prevRestrictions = getEffectiveUserRestrictions(userId); 735 736 // Update system restrictions. 737 if (newRestrictions != null) { 738 // If newRestrictions == the current one, it's probably a bug. 739 Preconditions.checkState(mBaseUserRestrictions.get(userId) != newRestrictions); 740 Preconditions.checkState(mCachedEffectiveUserRestrictions.get(userId) 741 != newRestrictions); 742 mBaseUserRestrictions.put(userId, newRestrictions); 743 } 744 745 mCachedEffectiveUserRestrictions.put( 746 userId, computeEffectiveUserRestrictionsRL(userId)); 747 748 applyUserRestrictionsRL(userId, mBaseUserRestrictions.get(userId), prevRestrictions); 749 } 750 751 @GuardedBy("mRestrictionsLock") 752 private void applyUserRestrictionsRL(int userId, 753 Bundle newRestrictions, Bundle prevRestrictions) { 754 final long token = Binder.clearCallingIdentity(); 755 try { 756 mAppOpsService.setUserRestrictions(newRestrictions, userId); 757 } catch (RemoteException e) { 758 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 759 } finally { 760 Binder.restoreCallingIdentity(token); 761 } 762 763 // TODO Move the code from DPMS.setUserRestriction(). 764 } 765 766 @GuardedBy("mRestrictionsLock") 767 private void updateEffectiveUserRestrictionsRL(int userId) { 768 updateUserRestrictionsInternalRL(null, userId); 769 } 770 771 @GuardedBy("mRestrictionsLock") 772 private void updateEffectiveUserRestrictionsForAllUsersRL() { 773 // First, invalidate all cached values. 774 synchronized (mRestrictionsLock) { 775 mCachedEffectiveUserRestrictions.clear(); 776 } 777 // We don't want to call into ActivityManagerNative while taking a lock, so we'll call 778 // it on a handler. 779 final Runnable r = new Runnable() { 780 @Override 781 public void run() { 782 // Then get the list of running users. 783 final int[] runningUsers; 784 try { 785 runningUsers = ActivityManagerNative.getDefault().getRunningUserIds(); 786 } catch (RemoteException e) { 787 Log.w(LOG_TAG, "Unable to access ActivityManagerNative"); 788 return; 789 } 790 // Then re-calculate the effective restrictions and apply, only for running users. 791 // It's okay if a new user has started after the getRunningUserIds() call, 792 // because we'll do the same thing (re-calculate the restrictions and apply) 793 // when we start a user. 794 // TODO: "Apply restrictions upon user start hasn't been implemented. Implement it. 795 synchronized (mRestrictionsLock) { 796 for (int i = 0; i < runningUsers.length; i++) { 797 updateUserRestrictionsInternalRL(null, runningUsers[i]); 798 } 799 } 800 } 801 }; 802 mHandler.post(r); 803 } 804 805 /** 806 * Check if we've hit the limit of how many users can be created. 807 */ 808 private boolean isUserLimitReachedLocked() { 809 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 810 } 811 812 @Override 813 public boolean canAddMoreManagedProfiles(int userId) { 814 checkManageUsersPermission("check if more managed profiles can be added."); 815 if (ActivityManager.isLowRamDeviceStatic()) { 816 return false; 817 } 818 if (!mContext.getPackageManager().hasSystemFeature( 819 PackageManager.FEATURE_MANAGED_USERS)) { 820 return false; 821 } 822 // Limit number of managed profiles that can be created 823 int managedProfilesCount = getProfiles(userId, true).size() - 1; 824 if (managedProfilesCount >= MAX_MANAGED_PROFILES) { 825 return false; 826 } 827 synchronized(mPackagesLock) { 828 UserInfo userInfo = getUserInfoLocked(userId); 829 if (!userInfo.canHaveProfile()) { 830 return false; 831 } 832 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 833 // We allow creating a managed profile in the special case where there is only one user. 834 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 835 } 836 } 837 838 private int getAliveUsersExcludingGuestsCountLocked() { 839 int aliveUserCount = 0; 840 final int totalUserCount = mUsers.size(); 841 // Skip over users being removed 842 for (int i = 0; i < totalUserCount; i++) { 843 UserInfo user = mUsers.valueAt(i); 844 if (!mRemovingUserIds.get(user.id) 845 && !user.isGuest() && !user.partial) { 846 aliveUserCount++; 847 } 848 } 849 return aliveUserCount; 850 } 851 852 /** 853 * Enforces that only the system UID or root's UID or apps that have the 854 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 855 * permission can make certain calls to the UserManager. 856 * 857 * @param message used as message if SecurityException is thrown 858 * @throws SecurityException if the caller is not system or root 859 */ 860 private static final void checkManageUsersPermission(String message) { 861 final int uid = Binder.getCallingUid(); 862 if (uid != Process.SYSTEM_UID && uid != 0 863 && ActivityManager.checkComponentPermission( 864 android.Manifest.permission.MANAGE_USERS, 865 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 866 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 867 } 868 } 869 870 private static void checkSystemOrRoot(String message) { 871 final int uid = Binder.getCallingUid(); 872 if (uid != Process.SYSTEM_UID && uid != 0) { 873 throw new SecurityException("Only system may call: " + message); 874 } 875 } 876 877 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 878 try { 879 File dir = new File(mUsersDir, Integer.toString(info.id)); 880 File file = new File(dir, USER_PHOTO_FILENAME); 881 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 882 if (!dir.exists()) { 883 dir.mkdir(); 884 FileUtils.setPermissions( 885 dir.getPath(), 886 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 887 -1, -1); 888 } 889 FileOutputStream os; 890 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 891 && tmp.renameTo(file)) { 892 info.iconPath = file.getAbsolutePath(); 893 } 894 try { 895 os.close(); 896 } catch (IOException ioe) { 897 // What the ... ! 898 } 899 tmp.delete(); 900 } catch (FileNotFoundException e) { 901 Slog.w(LOG_TAG, "Error setting photo for user ", e); 902 } 903 } 904 905 /** 906 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 907 * cache it elsewhere. 908 * @return the array of user ids. 909 */ 910 public int[] getUserIds() { 911 synchronized (mPackagesLock) { 912 return mUserIds; 913 } 914 } 915 916 int[] getUserIdsLPr() { 917 return mUserIds; 918 } 919 920 private void readUserListLocked() { 921 if (!mUserListFile.exists()) { 922 fallbackToSingleUserLocked(); 923 return; 924 } 925 FileInputStream fis = null; 926 AtomicFile userListFile = new AtomicFile(mUserListFile); 927 try { 928 fis = userListFile.openRead(); 929 XmlPullParser parser = Xml.newPullParser(); 930 parser.setInput(fis, StandardCharsets.UTF_8.name()); 931 int type; 932 while ((type = parser.next()) != XmlPullParser.START_TAG 933 && type != XmlPullParser.END_DOCUMENT) { 934 ; 935 } 936 937 if (type != XmlPullParser.START_TAG) { 938 Slog.e(LOG_TAG, "Unable to read user list"); 939 fallbackToSingleUserLocked(); 940 return; 941 } 942 943 mNextSerialNumber = -1; 944 if (parser.getName().equals(TAG_USERS)) { 945 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 946 if (lastSerialNumber != null) { 947 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 948 } 949 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 950 if (versionNumber != null) { 951 mUserVersion = Integer.parseInt(versionNumber); 952 } 953 } 954 955 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 956 if (type == XmlPullParser.START_TAG) { 957 final String name = parser.getName(); 958 if (name.equals(TAG_USER)) { 959 String id = parser.getAttributeValue(null, ATTR_ID); 960 UserInfo user = readUserLocked(Integer.parseInt(id)); 961 962 if (user != null) { 963 mUsers.put(user.id, user); 964 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 965 mNextSerialNumber = user.id + 1; 966 } 967 } 968 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 969 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 970 && type != XmlPullParser.END_TAG) { 971 if (type == XmlPullParser.START_TAG) { 972 if (parser.getName().equals(TAG_RESTRICTIONS)) { 973 UserRestrictionsUtils 974 .readRestrictions(parser, mGuestRestrictions); 975 } 976 break; 977 } 978 } 979 } 980 } 981 } 982 updateUserIdsLocked(); 983 upgradeIfNecessaryLocked(); 984 } catch (IOException ioe) { 985 fallbackToSingleUserLocked(); 986 } catch (XmlPullParserException pe) { 987 fallbackToSingleUserLocked(); 988 } finally { 989 if (fis != null) { 990 try { 991 fis.close(); 992 } catch (IOException e) { 993 } 994 } 995 } 996 } 997 998 /** 999 * Upgrade steps between versions, either for fixing bugs or changing the data format. 1000 */ 1001 private void upgradeIfNecessaryLocked() { 1002 int userVersion = mUserVersion; 1003 if (userVersion < 1) { 1004 // Assign a proper name for the owner, if not initialized correctly before 1005 UserInfo user = mUsers.get(UserHandle.USER_SYSTEM); 1006 if ("Primary".equals(user.name)) { 1007 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 1008 scheduleWriteUserLocked(user); 1009 } 1010 userVersion = 1; 1011 } 1012 1013 if (userVersion < 2) { 1014 // Owner should be marked as initialized 1015 UserInfo user = mUsers.get(UserHandle.USER_SYSTEM); 1016 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 1017 user.flags |= UserInfo.FLAG_INITIALIZED; 1018 scheduleWriteUserLocked(user); 1019 } 1020 userVersion = 2; 1021 } 1022 1023 1024 if (userVersion < 4) { 1025 userVersion = 4; 1026 } 1027 1028 if (userVersion < 5) { 1029 initDefaultGuestRestrictions(); 1030 userVersion = 5; 1031 } 1032 1033 if (userVersion < 6) { 1034 final boolean splitSystemUser = UserManager.isSplitSystemUser(); 1035 for (int i = 0; i < mUsers.size(); i++) { 1036 UserInfo user = mUsers.valueAt(i); 1037 // In non-split mode, only user 0 can have restricted profiles 1038 if (!splitSystemUser && user.isRestricted() 1039 && (user.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID)) { 1040 user.restrictedProfileParentId = UserHandle.USER_SYSTEM; 1041 scheduleWriteUserLocked(user); 1042 } 1043 } 1044 userVersion = 6; 1045 } 1046 1047 if (userVersion < USER_VERSION) { 1048 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 1049 + USER_VERSION); 1050 } else { 1051 mUserVersion = userVersion; 1052 writeUserListLocked(); 1053 } 1054 } 1055 1056 private void fallbackToSingleUserLocked() { 1057 int flags = UserInfo.FLAG_INITIALIZED; 1058 // In split system user mode, the admin and primary flags are assigned to the first human 1059 // user. 1060 if (!UserManager.isSplitSystemUser()) { 1061 flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY; 1062 } 1063 // Create the system user 1064 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 1065 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 1066 flags); 1067 mUsers.put(system.id, system); 1068 mNextSerialNumber = MIN_USER_ID; 1069 mUserVersion = USER_VERSION; 1070 1071 Bundle restrictions = new Bundle(); 1072 synchronized (mRestrictionsLock) { 1073 mBaseUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 1074 } 1075 1076 updateUserIdsLocked(); 1077 initDefaultGuestRestrictions(); 1078 1079 writeUserListLocked(); 1080 writeUserLocked(system); 1081 } 1082 1083 private void scheduleWriteUserLocked(UserInfo userInfo) { 1084 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 1085 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 1086 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 1087 } 1088 } 1089 1090 /* 1091 * Writes the user file in this format: 1092 * 1093 * <user flags="20039023" id="0"> 1094 * <name>Primary</name> 1095 * </user> 1096 */ 1097 private void writeUserLocked(UserInfo userInfo) { 1098 FileOutputStream fos = null; 1099 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 1100 try { 1101 fos = userFile.startWrite(); 1102 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1103 1104 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1105 final XmlSerializer serializer = new FastXmlSerializer(); 1106 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1107 serializer.startDocument(null, true); 1108 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1109 1110 serializer.startTag(null, TAG_USER); 1111 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 1112 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 1113 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 1114 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 1115 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 1116 Long.toString(userInfo.lastLoggedInTime)); 1117 if (userInfo.iconPath != null) { 1118 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 1119 } 1120 if (userInfo.partial) { 1121 serializer.attribute(null, ATTR_PARTIAL, "true"); 1122 } 1123 if (userInfo.guestToRemove) { 1124 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 1125 } 1126 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 1127 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 1128 Integer.toString(userInfo.profileGroupId)); 1129 } 1130 if (userInfo.restrictedProfileParentId != UserInfo.NO_PROFILE_GROUP_ID) { 1131 serializer.attribute(null, ATTR_RESTRICTED_PROFILE_PARENT_ID, 1132 Integer.toString(userInfo.restrictedProfileParentId)); 1133 } 1134 serializer.startTag(null, TAG_NAME); 1135 serializer.text(userInfo.name); 1136 serializer.endTag(null, TAG_NAME); 1137 Bundle restrictions; 1138 synchronized (mRestrictionsLock) { 1139 restrictions = mBaseUserRestrictions.get(userInfo.id); 1140 } 1141 if (restrictions != null) { 1142 UserRestrictionsUtils 1143 .writeRestrictions(serializer, restrictions, TAG_RESTRICTIONS); 1144 } 1145 serializer.endTag(null, TAG_USER); 1146 1147 serializer.endDocument(); 1148 userFile.finishWrite(fos); 1149 } catch (Exception ioe) { 1150 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 1151 userFile.failWrite(fos); 1152 } 1153 } 1154 1155 /* 1156 * Writes the user list file in this format: 1157 * 1158 * <users nextSerialNumber="3"> 1159 * <user id="0"></user> 1160 * <user id="2"></user> 1161 * </users> 1162 */ 1163 private void writeUserListLocked() { 1164 FileOutputStream fos = null; 1165 AtomicFile userListFile = new AtomicFile(mUserListFile); 1166 try { 1167 fos = userListFile.startWrite(); 1168 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1169 1170 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1171 final XmlSerializer serializer = new FastXmlSerializer(); 1172 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1173 serializer.startDocument(null, true); 1174 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1175 1176 serializer.startTag(null, TAG_USERS); 1177 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 1178 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 1179 1180 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 1181 UserRestrictionsUtils 1182 .writeRestrictions(serializer, mGuestRestrictions, TAG_RESTRICTIONS); 1183 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 1184 final int userSize = mUsers.size(); 1185 for (int i = 0; i < userSize; i++) { 1186 UserInfo user = mUsers.valueAt(i); 1187 serializer.startTag(null, TAG_USER); 1188 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 1189 serializer.endTag(null, TAG_USER); 1190 } 1191 1192 serializer.endTag(null, TAG_USERS); 1193 1194 serializer.endDocument(); 1195 userListFile.finishWrite(fos); 1196 } catch (Exception e) { 1197 userListFile.failWrite(fos); 1198 Slog.e(LOG_TAG, "Error writing user list"); 1199 } 1200 } 1201 1202 private UserInfo readUserLocked(int id) { 1203 int flags = 0; 1204 int serialNumber = id; 1205 String name = null; 1206 String iconPath = null; 1207 long creationTime = 0L; 1208 long lastLoggedInTime = 0L; 1209 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1210 int restrictedProfileParentId = UserInfo.NO_PROFILE_GROUP_ID; 1211 boolean partial = false; 1212 boolean guestToRemove = false; 1213 Bundle restrictions = new Bundle(); 1214 1215 FileInputStream fis = null; 1216 try { 1217 AtomicFile userFile = 1218 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1219 fis = userFile.openRead(); 1220 XmlPullParser parser = Xml.newPullParser(); 1221 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1222 int type; 1223 while ((type = parser.next()) != XmlPullParser.START_TAG 1224 && type != XmlPullParser.END_DOCUMENT) { 1225 ; 1226 } 1227 1228 if (type != XmlPullParser.START_TAG) { 1229 Slog.e(LOG_TAG, "Unable to read user " + id); 1230 return null; 1231 } 1232 1233 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1234 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1235 if (storedId != id) { 1236 Slog.e(LOG_TAG, "User id does not match the file name"); 1237 return null; 1238 } 1239 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1240 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1241 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1242 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1243 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1244 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1245 UserInfo.NO_PROFILE_GROUP_ID); 1246 restrictedProfileParentId = readIntAttribute(parser, 1247 ATTR_RESTRICTED_PROFILE_PARENT_ID, UserInfo.NO_PROFILE_GROUP_ID); 1248 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1249 if ("true".equals(valueString)) { 1250 partial = true; 1251 } 1252 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1253 if ("true".equals(valueString)) { 1254 guestToRemove = true; 1255 } 1256 1257 int outerDepth = parser.getDepth(); 1258 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1259 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1260 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1261 continue; 1262 } 1263 String tag = parser.getName(); 1264 if (TAG_NAME.equals(tag)) { 1265 type = parser.next(); 1266 if (type == XmlPullParser.TEXT) { 1267 name = parser.getText(); 1268 } 1269 } else if (TAG_RESTRICTIONS.equals(tag)) { 1270 UserRestrictionsUtils.readRestrictions(parser, restrictions); 1271 } 1272 } 1273 } 1274 1275 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1276 userInfo.serialNumber = serialNumber; 1277 userInfo.creationTime = creationTime; 1278 userInfo.lastLoggedInTime = lastLoggedInTime; 1279 userInfo.partial = partial; 1280 userInfo.guestToRemove = guestToRemove; 1281 userInfo.profileGroupId = profileGroupId; 1282 userInfo.restrictedProfileParentId = restrictedProfileParentId; 1283 synchronized (mRestrictionsLock) { 1284 mBaseUserRestrictions.append(id, restrictions); 1285 } 1286 return userInfo; 1287 1288 } catch (IOException ioe) { 1289 } catch (XmlPullParserException pe) { 1290 } finally { 1291 if (fis != null) { 1292 try { 1293 fis.close(); 1294 } catch (IOException e) { 1295 } 1296 } 1297 } 1298 return null; 1299 } 1300 1301 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1302 String valueString = parser.getAttributeValue(null, attr); 1303 if (valueString == null) return defaultValue; 1304 try { 1305 return Integer.parseInt(valueString); 1306 } catch (NumberFormatException nfe) { 1307 return defaultValue; 1308 } 1309 } 1310 1311 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1312 String valueString = parser.getAttributeValue(null, attr); 1313 if (valueString == null) return defaultValue; 1314 try { 1315 return Long.parseLong(valueString); 1316 } catch (NumberFormatException nfe) { 1317 return defaultValue; 1318 } 1319 } 1320 1321 private boolean isPackageInstalled(String pkg, int userId) { 1322 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1323 PackageManager.GET_UNINSTALLED_PACKAGES, 1324 userId); 1325 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1326 return false; 1327 } 1328 return true; 1329 } 1330 1331 /** 1332 * Removes all the restrictions files (res_<packagename>) for a given user. 1333 * Does not do any permissions checking. 1334 */ 1335 private void cleanAppRestrictions(int userId) { 1336 synchronized (mPackagesLock) { 1337 File dir = Environment.getUserSystemDirectory(userId); 1338 String[] files = dir.list(); 1339 if (files == null) return; 1340 for (String fileName : files) { 1341 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1342 File resFile = new File(dir, fileName); 1343 if (resFile.exists()) { 1344 resFile.delete(); 1345 } 1346 } 1347 } 1348 } 1349 } 1350 1351 /** 1352 * Removes the app restrictions file for a specific package and user id, if it exists. 1353 */ 1354 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1355 synchronized (mPackagesLock) { 1356 File dir = Environment.getUserSystemDirectory(userId); 1357 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1358 if (resFile.exists()) { 1359 resFile.delete(); 1360 } 1361 } 1362 } 1363 1364 @Override 1365 public UserInfo createProfileForUser(String name, int flags, int userId) { 1366 checkManageUsersPermission("Only the system can create users"); 1367 return createUserInternal(name, flags, userId); 1368 } 1369 1370 @Override 1371 public UserInfo createUser(String name, int flags) { 1372 checkManageUsersPermission("Only the system can create users"); 1373 return createUserInternal(name, flags, UserHandle.USER_NULL); 1374 } 1375 1376 private UserInfo createUserInternal(String name, int flags, int parentId) { 1377 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1378 UserManager.DISALLOW_ADD_USER, false)) { 1379 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1380 return null; 1381 } 1382 if (ActivityManager.isLowRamDeviceStatic()) { 1383 return null; 1384 } 1385 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1386 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1387 final boolean isRestricted = (flags & UserInfo.FLAG_RESTRICTED) != 0; 1388 final long ident = Binder.clearCallingIdentity(); 1389 UserInfo userInfo = null; 1390 final int userId; 1391 try { 1392 synchronized (mInstallLock) { 1393 synchronized (mPackagesLock) { 1394 UserInfo parent = null; 1395 if (parentId != UserHandle.USER_NULL) { 1396 parent = getUserInfoLocked(parentId); 1397 if (parent == null) return null; 1398 } 1399 if (isManagedProfile && !canAddMoreManagedProfiles(parentId)) { 1400 Log.e(LOG_TAG, "Cannot add more managed profiles for user " + parentId); 1401 return null; 1402 } 1403 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1404 // If we're not adding a guest user or a managed profile and the limit has 1405 // been reached, cannot add a user. 1406 return null; 1407 } 1408 // If we're adding a guest and there already exists one, bail. 1409 if (isGuest && findCurrentGuestUserLocked() != null) { 1410 return null; 1411 } 1412 // In legacy mode, restricted profile's parent can only be the owner user 1413 if (isRestricted && !UserManager.isSplitSystemUser() 1414 && (parentId != UserHandle.USER_SYSTEM)) { 1415 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1416 return null; 1417 } 1418 if (isRestricted && UserManager.isSplitSystemUser()) { 1419 if (parent == null) { 1420 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be " 1421 + "specified"); 1422 return null; 1423 } 1424 if (!parent.canHaveProfile()) { 1425 Log.w(LOG_TAG, "Cannot add restricted profile - profiles cannot be " 1426 + "created for the specified parent user id " + parentId); 1427 return null; 1428 } 1429 } 1430 // In split system user mode, we assign the first human user the primary flag. 1431 // And if there is no device owner, we also assign the admin flag to primary 1432 // user. 1433 if (UserManager.isSplitSystemUser() 1434 && !isGuest && !isManagedProfile && getPrimaryUser() == null) { 1435 flags |= UserInfo.FLAG_PRIMARY; 1436 DevicePolicyManager devicePolicyManager = (DevicePolicyManager) 1437 mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); 1438 if (devicePolicyManager == null 1439 || devicePolicyManager.getDeviceOwner() == null) { 1440 flags |= UserInfo.FLAG_ADMIN; 1441 } 1442 } 1443 userId = getNextAvailableIdLocked(); 1444 userInfo = new UserInfo(userId, name, null, flags); 1445 userInfo.serialNumber = mNextSerialNumber++; 1446 long now = System.currentTimeMillis(); 1447 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1448 userInfo.partial = true; 1449 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1450 mUsers.put(userId, userInfo); 1451 writeUserListLocked(); 1452 if (parent != null) { 1453 if (isManagedProfile) { 1454 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1455 parent.profileGroupId = parent.id; 1456 scheduleWriteUserLocked(parent); 1457 } 1458 userInfo.profileGroupId = parent.profileGroupId; 1459 } else if (isRestricted) { 1460 if (!parent.canHaveProfile()) { 1461 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1462 } 1463 if (parent.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID) { 1464 parent.restrictedProfileParentId = parent.id; 1465 scheduleWriteUserLocked(parent); 1466 } 1467 userInfo.restrictedProfileParentId = parent.restrictedProfileParentId; 1468 } 1469 } 1470 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1471 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1472 final String volumeUuid = vol.getFsUuid(); 1473 try { 1474 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1475 userId); 1476 prepareUserDirectory(mContext, volumeUuid, userId); 1477 enforceSerialNumber(userDir, userInfo.serialNumber); 1478 } catch (IOException e) { 1479 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1480 } 1481 } 1482 mPm.createNewUserLILPw(userId); 1483 userInfo.partial = false; 1484 scheduleWriteUserLocked(userInfo); 1485 updateUserIdsLocked(); 1486 Bundle restrictions = new Bundle(); 1487 synchronized (mRestrictionsLock) { 1488 mBaseUserRestrictions.append(userId, restrictions); 1489 } 1490 } 1491 } 1492 mPm.newUserCreated(userId); 1493 if (userInfo != null) { 1494 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1495 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1496 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1497 android.Manifest.permission.MANAGE_USERS); 1498 } 1499 } finally { 1500 Binder.restoreCallingIdentity(ident); 1501 } 1502 return userInfo; 1503 } 1504 1505 /** 1506 * @hide 1507 */ 1508 public UserInfo createRestrictedProfile(String name, int parentUserId) { 1509 checkManageUsersPermission("setupRestrictedProfile"); 1510 final UserInfo user = createProfileForUser(name, UserInfo.FLAG_RESTRICTED, parentUserId); 1511 if (user == null) { 1512 return null; 1513 } 1514 setUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS, true, user.id); 1515 // Change the setting before applying the DISALLOW_SHARE_LOCATION restriction, otherwise 1516 // the putIntForUser() will fail. 1517 android.provider.Settings.Secure.putIntForUser(mContext.getContentResolver(), 1518 android.provider.Settings.Secure.LOCATION_MODE, 1519 android.provider.Settings.Secure.LOCATION_MODE_OFF, user.id); 1520 setUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, true, user.id); 1521 return user; 1522 } 1523 1524 /** 1525 * Find the current guest user. If the Guest user is partial, 1526 * then do not include it in the results as it is about to die. 1527 */ 1528 private UserInfo findCurrentGuestUserLocked() { 1529 final int size = mUsers.size(); 1530 for (int i = 0; i < size; i++) { 1531 final UserInfo user = mUsers.valueAt(i); 1532 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1533 return user; 1534 } 1535 } 1536 return null; 1537 } 1538 1539 /** 1540 * Mark this guest user for deletion to allow us to create another guest 1541 * and switch to that user before actually removing this guest. 1542 * @param userHandle the userid of the current guest 1543 * @return whether the user could be marked for deletion 1544 */ 1545 public boolean markGuestForDeletion(int userHandle) { 1546 checkManageUsersPermission("Only the system can remove users"); 1547 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1548 UserManager.DISALLOW_REMOVE_USER, false)) { 1549 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1550 return false; 1551 } 1552 1553 long ident = Binder.clearCallingIdentity(); 1554 try { 1555 final UserInfo user; 1556 synchronized (mPackagesLock) { 1557 user = mUsers.get(userHandle); 1558 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1559 return false; 1560 } 1561 if (!user.isGuest()) { 1562 return false; 1563 } 1564 // We set this to a guest user that is to be removed. This is a temporary state 1565 // where we are allowed to add new Guest users, even if this one is still not 1566 // removed. This user will still show up in getUserInfo() calls. 1567 // If we don't get around to removing this Guest user, it will be purged on next 1568 // startup. 1569 user.guestToRemove = true; 1570 // Mark it as disabled, so that it isn't returned any more when 1571 // profiles are queried. 1572 user.flags |= UserInfo.FLAG_DISABLED; 1573 writeUserLocked(user); 1574 } 1575 } finally { 1576 Binder.restoreCallingIdentity(ident); 1577 } 1578 return true; 1579 } 1580 1581 /** 1582 * Removes a user and all data directories created for that user. This method should be called 1583 * after the user's processes have been terminated. 1584 * @param userHandle the user's id 1585 */ 1586 public boolean removeUser(int userHandle) { 1587 checkManageUsersPermission("Only the system can remove users"); 1588 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1589 UserManager.DISALLOW_REMOVE_USER, false)) { 1590 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1591 return false; 1592 } 1593 1594 long ident = Binder.clearCallingIdentity(); 1595 try { 1596 final UserInfo user; 1597 int currentUser = ActivityManager.getCurrentUser(); 1598 if (currentUser == userHandle) { 1599 Log.w(LOG_TAG, "Current user cannot be removed"); 1600 return false; 1601 } 1602 synchronized (mPackagesLock) { 1603 user = mUsers.get(userHandle); 1604 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1605 return false; 1606 } 1607 1608 // We remember deleted user IDs to prevent them from being 1609 // reused during the current boot; they can still be reused 1610 // after a reboot. 1611 mRemovingUserIds.put(userHandle, true); 1612 1613 try { 1614 mAppOpsService.removeUser(userHandle); 1615 } catch (RemoteException e) { 1616 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1617 } 1618 // Set this to a partially created user, so that the user will be purged 1619 // on next startup, in case the runtime stops now before stopping and 1620 // removing the user completely. 1621 user.partial = true; 1622 // Mark it as disabled, so that it isn't returned any more when 1623 // profiles are queried. 1624 user.flags |= UserInfo.FLAG_DISABLED; 1625 writeUserLocked(user); 1626 } 1627 1628 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1629 && user.isManagedProfile()) { 1630 // Send broadcast to notify system that the user removed was a 1631 // managed user. 1632 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1633 } 1634 1635 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1636 int res; 1637 try { 1638 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1639 new IStopUserCallback.Stub() { 1640 @Override 1641 public void userStopped(int userId) { 1642 finishRemoveUser(userId); 1643 } 1644 @Override 1645 public void userStopAborted(int userId) { 1646 } 1647 }); 1648 } catch (RemoteException e) { 1649 return false; 1650 } 1651 return res == ActivityManager.USER_OP_SUCCESS; 1652 } finally { 1653 Binder.restoreCallingIdentity(ident); 1654 } 1655 } 1656 1657 void finishRemoveUser(final int userHandle) { 1658 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1659 // Let other services shutdown any activity and clean up their state before completely 1660 // wiping the user's system directory and removing from the user list 1661 long ident = Binder.clearCallingIdentity(); 1662 try { 1663 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1664 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1665 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1666 android.Manifest.permission.MANAGE_USERS, 1667 1668 new BroadcastReceiver() { 1669 @Override 1670 public void onReceive(Context context, Intent intent) { 1671 if (DBG) { 1672 Slog.i(LOG_TAG, 1673 "USER_REMOVED broadcast sent, cleaning up user data " 1674 + userHandle); 1675 } 1676 new Thread() { 1677 public void run() { 1678 // Clean up any ActivityManager state 1679 LocalServices.getService(ActivityManagerInternal.class) 1680 .onUserRemoved(userHandle); 1681 synchronized (mInstallLock) { 1682 synchronized (mPackagesLock) { 1683 removeUserStateLocked(userHandle); 1684 } 1685 } 1686 } 1687 }.start(); 1688 } 1689 }, 1690 1691 null, Activity.RESULT_OK, null, null); 1692 } finally { 1693 Binder.restoreCallingIdentity(ident); 1694 } 1695 } 1696 1697 private void removeUserStateLocked(final int userHandle) { 1698 mContext.getSystemService(StorageManager.class) 1699 .deleteUserKey(userHandle); 1700 // Cleanup package manager settings 1701 mPm.cleanUpUserLILPw(this, userHandle); 1702 1703 // Remove this user from the list 1704 mUsers.remove(userHandle); 1705 // Remove user file 1706 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1707 userFile.delete(); 1708 // Update the user list 1709 writeUserListLocked(); 1710 updateUserIdsLocked(); 1711 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1712 } 1713 1714 private void removeDirectoryRecursive(File parent) { 1715 if (parent.isDirectory()) { 1716 String[] files = parent.list(); 1717 for (String filename : files) { 1718 File child = new File(parent, filename); 1719 removeDirectoryRecursive(child); 1720 } 1721 } 1722 parent.delete(); 1723 } 1724 1725 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1726 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1727 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1728 Intent.FLAG_RECEIVER_FOREGROUND); 1729 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1730 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1731 } 1732 1733 @Override 1734 public Bundle getApplicationRestrictions(String packageName) { 1735 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1736 } 1737 1738 @Override 1739 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1740 if (UserHandle.getCallingUserId() != userId 1741 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1742 checkManageUsersPermission("get application restrictions for other users/apps"); 1743 } 1744 synchronized (mPackagesLock) { 1745 // Read the restrictions from XML 1746 return readApplicationRestrictionsLocked(packageName, userId); 1747 } 1748 } 1749 1750 @Override 1751 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1752 int userId) { 1753 checkManageUsersPermission("set application restrictions"); 1754 synchronized (mPackagesLock) { 1755 if (restrictions == null || restrictions.isEmpty()) { 1756 cleanAppRestrictionsForPackage(packageName, userId); 1757 } else { 1758 // Write the restrictions to XML 1759 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1760 } 1761 } 1762 1763 if (isPackageInstalled(packageName, userId)) { 1764 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1765 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1766 changeIntent.setPackage(packageName); 1767 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1768 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1769 } 1770 } 1771 1772 private void unhideAllInstalledAppsForUser(final int userHandle) { 1773 mHandler.post(new Runnable() { 1774 @Override 1775 public void run() { 1776 List<ApplicationInfo> apps = 1777 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1778 userHandle).getList(); 1779 final long ident = Binder.clearCallingIdentity(); 1780 try { 1781 for (ApplicationInfo appInfo : apps) { 1782 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1783 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1784 != 0) { 1785 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1786 userHandle); 1787 } 1788 } 1789 } finally { 1790 Binder.restoreCallingIdentity(ident); 1791 } 1792 } 1793 }); 1794 } 1795 private int getUidForPackage(String packageName) { 1796 long ident = Binder.clearCallingIdentity(); 1797 try { 1798 return mContext.getPackageManager().getApplicationInfo(packageName, 1799 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1800 } catch (NameNotFoundException nnfe) { 1801 return -1; 1802 } finally { 1803 Binder.restoreCallingIdentity(ident); 1804 } 1805 } 1806 1807 private Bundle readApplicationRestrictionsLocked(String packageName, 1808 int userId) { 1809 AtomicFile restrictionsFile = 1810 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1811 packageToRestrictionsFileName(packageName))); 1812 return readApplicationRestrictionsLocked(restrictionsFile); 1813 } 1814 1815 @VisibleForTesting 1816 static Bundle readApplicationRestrictionsLocked(AtomicFile restrictionsFile) { 1817 final Bundle restrictions = new Bundle(); 1818 final ArrayList<String> values = new ArrayList<>(); 1819 if (!restrictionsFile.getBaseFile().exists()) { 1820 return restrictions; 1821 } 1822 1823 FileInputStream fis = null; 1824 try { 1825 fis = restrictionsFile.openRead(); 1826 XmlPullParser parser = Xml.newPullParser(); 1827 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1828 XmlUtils.nextElement(parser); 1829 if (parser.getEventType() != XmlPullParser.START_TAG) { 1830 Slog.e(LOG_TAG, "Unable to read restrictions file " 1831 + restrictionsFile.getBaseFile()); 1832 return restrictions; 1833 } 1834 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1835 readEntry(restrictions, values, parser); 1836 } 1837 } catch (IOException|XmlPullParserException e) { 1838 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1839 } finally { 1840 IoUtils.closeQuietly(fis); 1841 } 1842 return restrictions; 1843 } 1844 1845 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1846 XmlPullParser parser) throws XmlPullParserException, IOException { 1847 int type = parser.getEventType(); 1848 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1849 String key = parser.getAttributeValue(null, ATTR_KEY); 1850 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1851 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1852 if (multiple != null) { 1853 values.clear(); 1854 int count = Integer.parseInt(multiple); 1855 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1856 if (type == XmlPullParser.START_TAG 1857 && parser.getName().equals(TAG_VALUE)) { 1858 values.add(parser.nextText().trim()); 1859 count--; 1860 } 1861 } 1862 String [] valueStrings = new String[values.size()]; 1863 values.toArray(valueStrings); 1864 restrictions.putStringArray(key, valueStrings); 1865 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1866 restrictions.putBundle(key, readBundleEntry(parser, values)); 1867 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1868 final int outerDepth = parser.getDepth(); 1869 ArrayList<Bundle> bundleList = new ArrayList<>(); 1870 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1871 Bundle childBundle = readBundleEntry(parser, values); 1872 bundleList.add(childBundle); 1873 } 1874 restrictions.putParcelableArray(key, 1875 bundleList.toArray(new Bundle[bundleList.size()])); 1876 } else { 1877 String value = parser.nextText().trim(); 1878 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1879 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1880 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1881 restrictions.putInt(key, Integer.parseInt(value)); 1882 } else { 1883 restrictions.putString(key, value); 1884 } 1885 } 1886 } 1887 } 1888 1889 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1890 throws IOException, XmlPullParserException { 1891 Bundle childBundle = new Bundle(); 1892 final int outerDepth = parser.getDepth(); 1893 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1894 readEntry(childBundle, values, parser); 1895 } 1896 return childBundle; 1897 } 1898 1899 private void writeApplicationRestrictionsLocked(String packageName, 1900 Bundle restrictions, int userId) { 1901 AtomicFile restrictionsFile = new AtomicFile( 1902 new File(Environment.getUserSystemDirectory(userId), 1903 packageToRestrictionsFileName(packageName))); 1904 writeApplicationRestrictionsLocked(restrictions, restrictionsFile); 1905 } 1906 1907 @VisibleForTesting 1908 static void writeApplicationRestrictionsLocked(Bundle restrictions, 1909 AtomicFile restrictionsFile) { 1910 FileOutputStream fos = null; 1911 try { 1912 fos = restrictionsFile.startWrite(); 1913 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1914 1915 final XmlSerializer serializer = new FastXmlSerializer(); 1916 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1917 serializer.startDocument(null, true); 1918 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1919 1920 serializer.startTag(null, TAG_RESTRICTIONS); 1921 writeBundle(restrictions, serializer); 1922 serializer.endTag(null, TAG_RESTRICTIONS); 1923 1924 serializer.endDocument(); 1925 restrictionsFile.finishWrite(fos); 1926 } catch (Exception e) { 1927 restrictionsFile.failWrite(fos); 1928 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 1929 } 1930 } 1931 1932 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1933 throws IOException { 1934 for (String key : restrictions.keySet()) { 1935 Object value = restrictions.get(key); 1936 serializer.startTag(null, TAG_ENTRY); 1937 serializer.attribute(null, ATTR_KEY, key); 1938 1939 if (value instanceof Boolean) { 1940 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1941 serializer.text(value.toString()); 1942 } else if (value instanceof Integer) { 1943 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1944 serializer.text(value.toString()); 1945 } else if (value == null || value instanceof String) { 1946 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1947 serializer.text(value != null ? (String) value : ""); 1948 } else if (value instanceof Bundle) { 1949 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1950 writeBundle((Bundle) value, serializer); 1951 } else if (value instanceof Parcelable[]) { 1952 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 1953 Parcelable[] array = (Parcelable[]) value; 1954 for (Parcelable parcelable : array) { 1955 if (!(parcelable instanceof Bundle)) { 1956 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 1957 } 1958 serializer.startTag(null, TAG_ENTRY); 1959 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1960 writeBundle((Bundle) parcelable, serializer); 1961 serializer.endTag(null, TAG_ENTRY); 1962 } 1963 } else { 1964 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1965 String[] values = (String[]) value; 1966 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1967 for (String choice : values) { 1968 serializer.startTag(null, TAG_VALUE); 1969 serializer.text(choice != null ? choice : ""); 1970 serializer.endTag(null, TAG_VALUE); 1971 } 1972 } 1973 serializer.endTag(null, TAG_ENTRY); 1974 } 1975 } 1976 1977 @Override 1978 public int getUserSerialNumber(int userHandle) { 1979 synchronized (mPackagesLock) { 1980 if (!exists(userHandle)) return -1; 1981 return getUserInfoLocked(userHandle).serialNumber; 1982 } 1983 } 1984 1985 @Override 1986 public int getUserHandle(int userSerialNumber) { 1987 synchronized (mPackagesLock) { 1988 for (int userId : mUserIds) { 1989 UserInfo info = getUserInfoLocked(userId); 1990 if (info != null && info.serialNumber == userSerialNumber) return userId; 1991 } 1992 // Not found 1993 return -1; 1994 } 1995 } 1996 1997 @Override 1998 public long getUserCreationTime(int userHandle) { 1999 int callingUserId = UserHandle.getCallingUserId(); 2000 UserInfo userInfo = null; 2001 synchronized (mPackagesLock) { 2002 if (callingUserId == userHandle) { 2003 userInfo = getUserInfoLocked(userHandle); 2004 } else { 2005 UserInfo parent = getProfileParentLocked(userHandle); 2006 if (parent != null && parent.id == callingUserId) { 2007 userInfo = getUserInfoLocked(userHandle); 2008 } 2009 } 2010 } 2011 if (userInfo == null) { 2012 throw new SecurityException("userHandle can only be the calling user or a managed " 2013 + "profile associated with this user"); 2014 } 2015 return userInfo.creationTime; 2016 } 2017 2018 /** 2019 * Caches the list of user ids in an array, adjusting the array size when necessary. 2020 */ 2021 private void updateUserIdsLocked() { 2022 int num = 0; 2023 final int userSize = mUsers.size(); 2024 for (int i = 0; i < userSize; i++) { 2025 if (!mUsers.valueAt(i).partial) { 2026 num++; 2027 } 2028 } 2029 final int[] newUsers = new int[num]; 2030 int n = 0; 2031 for (int i = 0; i < userSize; i++) { 2032 if (!mUsers.valueAt(i).partial) { 2033 newUsers[n++] = mUsers.keyAt(i); 2034 } 2035 } 2036 mUserIds = newUsers; 2037 } 2038 2039 /** 2040 * Make a note of the last started time of a user and do some cleanup. 2041 * @param userId the user that was just foregrounded 2042 */ 2043 public void onUserForeground(int userId) { 2044 synchronized (mPackagesLock) { 2045 UserInfo user = mUsers.get(userId); 2046 long now = System.currentTimeMillis(); 2047 if (user == null || user.partial) { 2048 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 2049 return; 2050 } 2051 if (now > EPOCH_PLUS_30_YEARS) { 2052 user.lastLoggedInTime = now; 2053 scheduleWriteUserLocked(user); 2054 } 2055 } 2056 } 2057 2058 /** 2059 * Returns the next available user id, filling in any holes in the ids. 2060 * TODO: May not be a good idea to recycle ids, in case it results in confusion 2061 * for data and battery stats collection, or unexpected cross-talk. 2062 * @return 2063 */ 2064 private int getNextAvailableIdLocked() { 2065 synchronized (mPackagesLock) { 2066 int i = MIN_USER_ID; 2067 while (i < MAX_USER_ID) { 2068 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 2069 return i; 2070 } 2071 i++; 2072 } 2073 } 2074 throw new IllegalStateException("No user id available!"); 2075 } 2076 2077 private String packageToRestrictionsFileName(String packageName) { 2078 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 2079 } 2080 2081 /** 2082 * Create new {@code /data/user/[id]} directory and sets default 2083 * permissions. 2084 */ 2085 public static void prepareUserDirectory(Context context, String volumeUuid, int userId) { 2086 final StorageManager storage = context.getSystemService(StorageManager.class); 2087 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 2088 storage.createNewUserDir(userId, userDir); 2089 } 2090 2091 /** 2092 * Enforce that serial number stored in user directory inode matches the 2093 * given expected value. Gracefully sets the serial number if currently 2094 * undefined. 2095 * 2096 * @throws IOException when problem extracting serial number, or serial 2097 * number is mismatched. 2098 */ 2099 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 2100 final int foundSerial = getSerialNumber(file); 2101 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 2102 2103 if (foundSerial == -1) { 2104 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 2105 try { 2106 setSerialNumber(file, serialNumber); 2107 } catch (IOException e) { 2108 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 2109 } 2110 2111 } else if (foundSerial != serialNumber) { 2112 throw new IOException("Found serial number " + foundSerial 2113 + " doesn't match expected " + serialNumber); 2114 } 2115 } 2116 2117 /** 2118 * Set serial number stored in user directory inode. 2119 * 2120 * @throws IOException if serial number was already set 2121 */ 2122 private static void setSerialNumber(File file, int serialNumber) 2123 throws IOException { 2124 try { 2125 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 2126 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 2127 } catch (ErrnoException e) { 2128 throw e.rethrowAsIOException(); 2129 } 2130 } 2131 2132 /** 2133 * Return serial number stored in user directory inode. 2134 * 2135 * @return parsed serial number, or -1 if not set 2136 */ 2137 private static int getSerialNumber(File file) throws IOException { 2138 try { 2139 final byte[] buf = new byte[256]; 2140 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 2141 final String serial = new String(buf, 0, len); 2142 try { 2143 return Integer.parseInt(serial); 2144 } catch (NumberFormatException e) { 2145 throw new IOException("Bad serial number: " + serial); 2146 } 2147 } catch (ErrnoException e) { 2148 if (e.errno == OsConstants.ENODATA) { 2149 return -1; 2150 } else { 2151 throw e.rethrowAsIOException(); 2152 } 2153 } 2154 } 2155 2156 @Override 2157 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2158 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 2159 != PackageManager.PERMISSION_GRANTED) { 2160 pw.println("Permission Denial: can't dump UserManager from from pid=" 2161 + Binder.getCallingPid() 2162 + ", uid=" + Binder.getCallingUid() 2163 + " without permission " 2164 + android.Manifest.permission.DUMP); 2165 return; 2166 } 2167 2168 long now = System.currentTimeMillis(); 2169 StringBuilder sb = new StringBuilder(); 2170 synchronized (mPackagesLock) { 2171 pw.println("Users:"); 2172 for (int i = 0; i < mUsers.size(); i++) { 2173 UserInfo user = mUsers.valueAt(i); 2174 if (user == null) continue; 2175 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 2176 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 2177 if (user.partial) pw.print(" <partial>"); 2178 pw.println(); 2179 pw.print(" Created: "); 2180 if (user.creationTime == 0) { 2181 pw.println("<unknown>"); 2182 } else { 2183 sb.setLength(0); 2184 TimeUtils.formatDuration(now - user.creationTime, sb); 2185 sb.append(" ago"); 2186 pw.println(sb); 2187 } 2188 pw.print(" Last logged in: "); 2189 if (user.lastLoggedInTime == 0) { 2190 pw.println("<unknown>"); 2191 } else { 2192 sb.setLength(0); 2193 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2194 sb.append(" ago"); 2195 pw.println(sb); 2196 } 2197 pw.println(" Restrictions:"); 2198 UserRestrictionsUtils.dumpRestrictions( 2199 pw, " ", mBaseUserRestrictions.get(user.id)); 2200 pw.println(" Effective restrictions:"); 2201 UserRestrictionsUtils.dumpRestrictions( 2202 pw, " ", mCachedEffectiveUserRestrictions.get(user.id)); 2203 } 2204 pw.println(); 2205 pw.println("Guest restrictions:"); 2206 UserRestrictionsUtils.dumpRestrictions(pw, " ", mGuestRestrictions); 2207 } 2208 } 2209 2210 final class MainHandler extends Handler { 2211 2212 @Override 2213 public void handleMessage(Message msg) { 2214 switch (msg.what) { 2215 case WRITE_USER_MSG: 2216 removeMessages(WRITE_USER_MSG, msg.obj); 2217 synchronized (mPackagesLock) { 2218 int userId = ((UserInfo) msg.obj).id; 2219 UserInfo userInfo = mUsers.get(userId); 2220 if (userInfo != null) { 2221 writeUserLocked(userInfo); 2222 } 2223 } 2224 } 2225 } 2226 } 2227 2228 /** 2229 * @param userId 2230 * @return whether the user has been initialized yet 2231 */ 2232 boolean isInitialized(int userId) { 2233 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2234 } 2235 2236 private class LocalService extends UserManagerInternal { 2237 2238 @Override 2239 public Object getUserRestrictionsLock() { 2240 return mRestrictionsLock; 2241 } 2242 2243 @Override 2244 @GuardedBy("mRestrictionsLock") 2245 public void updateEffectiveUserRestrictionsRL(int userId) { 2246 UserManagerService.this.updateEffectiveUserRestrictionsRL(userId); 2247 } 2248 2249 @Override 2250 @GuardedBy("mRestrictionsLock") 2251 public void updateEffectiveUserRestrictionsForAllUsersRL() { 2252 UserManagerService.this.updateEffectiveUserRestrictionsForAllUsersRL(); 2253 } 2254 2255 @Override 2256 public Bundle getBaseUserRestrictions(int userId) { 2257 synchronized (mRestrictionsLock) { 2258 return mBaseUserRestrictions.get(userId); 2259 } 2260 } 2261 2262 @Override 2263 public void setBaseUserRestrictionsByDpmsForMigration( 2264 int userId, Bundle baseRestrictions) { 2265 synchronized (mRestrictionsLock) { 2266 mBaseUserRestrictions.put(userId, new Bundle(baseRestrictions)); 2267 invalidateEffectiveUserRestrictionsRL(userId); 2268 } 2269 2270 synchronized (mPackagesLock) { 2271 final UserInfo userInfo = mUsers.get(userId); 2272 if (userInfo != null) { 2273 writeUserLocked(userInfo); 2274 } else { 2275 Slog.w(LOG_TAG, "UserInfo not found for " + userId); 2276 } 2277 } 2278 } 2279 } 2280} 2281