UserManagerService.java revision f9fc6d6cc05595241bc7ced6d4cab97b45f9b901
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.IActivityManager; 26import android.app.IStopUserCallback; 27import android.app.admin.DevicePolicyManager; 28import android.app.admin.DevicePolicyManagerInternal; 29import android.content.BroadcastReceiver; 30import android.content.Context; 31import android.content.Intent; 32import android.content.pm.ApplicationInfo; 33import android.content.pm.PackageManager; 34import android.content.pm.PackageManager.NameNotFoundException; 35import android.content.pm.UserInfo; 36import android.graphics.Bitmap; 37import android.os.Binder; 38import android.os.Bundle; 39import android.os.Environment; 40import android.os.FileUtils; 41import android.os.Handler; 42import android.os.IUserManager; 43import android.os.Message; 44import android.os.ParcelFileDescriptor; 45import android.os.Parcelable; 46import android.os.Process; 47import android.os.RemoteException; 48import android.os.ResultReceiver; 49import android.os.ServiceManager; 50import android.os.ShellCommand; 51import android.os.SystemProperties; 52import android.os.UserHandle; 53import android.os.UserManager; 54import android.os.UserManagerInternal; 55import android.os.UserManagerInternal.UserRestrictionsListener; 56import android.os.storage.StorageManager; 57import android.os.storage.VolumeInfo; 58import android.system.ErrnoException; 59import android.system.Os; 60import android.system.OsConstants; 61import android.util.AtomicFile; 62import android.util.Log; 63import android.util.Slog; 64import android.util.SparseArray; 65import android.util.SparseBooleanArray; 66import android.util.TimeUtils; 67import android.util.Xml; 68 69import com.android.internal.annotations.GuardedBy; 70import com.android.internal.annotations.VisibleForTesting; 71import com.android.internal.app.IAppOpsService; 72import com.android.internal.util.FastXmlSerializer; 73import com.android.internal.util.Preconditions; 74import com.android.internal.util.XmlUtils; 75import com.android.server.LocalServices; 76 77import org.xmlpull.v1.XmlPullParser; 78import org.xmlpull.v1.XmlPullParserException; 79import org.xmlpull.v1.XmlSerializer; 80 81import java.io.BufferedOutputStream; 82import java.io.File; 83import java.io.FileDescriptor; 84import java.io.FileInputStream; 85import java.io.FileNotFoundException; 86import java.io.FileOutputStream; 87import java.io.IOException; 88import java.io.PrintWriter; 89import java.nio.charset.StandardCharsets; 90import java.util.ArrayList; 91import java.util.List; 92 93import libcore.io.IoUtils; 94 95/** 96 * Service for {@link UserManager}. 97 * 98 * Method naming convention: 99 * <ul> 100 * <li> Methods suffixed with "LILP" should be called within {@link #mInstallLock} and 101 * {@link #mPackagesLock} locks obtained in the respective order. 102 * <li> Methods suffixed with "LR" should be called within the {@link #mRestrictionsLock} lock. 103 * <li> Methods suffixed with "LU" should be called within the {@link #mUsersLock} lock. 104 * </ul> 105 */ 106public class UserManagerService extends IUserManager.Stub { 107 private static final String LOG_TAG = "UserManagerService"; 108 private static final boolean DBG = false; // DO NOT SUBMIT WITH TRUE 109 110 private static final String TAG_NAME = "name"; 111 private static final String ATTR_FLAGS = "flags"; 112 private static final String ATTR_ICON_PATH = "icon"; 113 private static final String ATTR_ID = "id"; 114 private static final String ATTR_CREATION_TIME = "created"; 115 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 116 private static final String ATTR_SERIAL_NO = "serialNumber"; 117 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 118 private static final String ATTR_PARTIAL = "partial"; 119 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 120 private static final String ATTR_USER_VERSION = "version"; 121 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 122 private static final String ATTR_RESTRICTED_PROFILE_PARENT_ID = "restrictedProfileParentId"; 123 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 124 private static final String TAG_USERS = "users"; 125 private static final String TAG_USER = "user"; 126 private static final String TAG_RESTRICTIONS = "restrictions"; 127 private static final String TAG_ENTRY = "entry"; 128 private static final String TAG_VALUE = "value"; 129 private static final String ATTR_KEY = "key"; 130 private static final String ATTR_VALUE_TYPE = "type"; 131 private static final String ATTR_MULTIPLE = "m"; 132 133 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 134 private static final String ATTR_TYPE_STRING = "s"; 135 private static final String ATTR_TYPE_BOOLEAN = "b"; 136 private static final String ATTR_TYPE_INTEGER = "i"; 137 private static final String ATTR_TYPE_BUNDLE = "B"; 138 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 139 140 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 141 private static final String USER_LIST_FILENAME = "userlist.xml"; 142 private static final String USER_PHOTO_FILENAME = "photo.png"; 143 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 144 145 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 146 private static final String XML_SUFFIX = ".xml"; 147 148 private static final int MIN_USER_ID = 10; 149 // We need to keep process uid within Integer.MAX_VALUE. 150 private static final int MAX_USER_ID = Integer.MAX_VALUE / UserHandle.PER_USER_RANGE; 151 152 private static final int USER_VERSION = 6; 153 154 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 155 156 // Maximum number of managed profiles permitted per user is 1. This cannot be increased 157 // without first making sure that the rest of the framework is prepared for it. 158 private static final int MAX_MANAGED_PROFILES = 1; 159 160 static final int WRITE_USER_MSG = 1; 161 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 162 163 private static final String XATTR_SERIAL = "user.serial"; 164 165 private final Context mContext; 166 private final PackageManagerService mPm; 167 private final Object mInstallLock; 168 private final Object mPackagesLock; 169 // Short-term lock for internal state, when interaction/sync with PM is not required 170 private final Object mUsersLock = new Object(); 171 private final Object mRestrictionsLock = new Object(); 172 173 private final Handler mHandler; 174 175 private final File mUsersDir; 176 private final File mUserListFile; 177 178 @GuardedBy("mUsersLock") 179 private final SparseArray<UserInfo> mUsers = new SparseArray<>(); 180 181 /** 182 * User restrictions set via UserManager. This doesn't include restrictions set by 183 * device owner / profile owners. 184 * 185 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 186 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 187 * maybe shared between {@link #mBaseUserRestrictions} and 188 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 189 * (Otherwise we won't be able to detect what restrictions have changed in 190 * {@link #updateUserRestrictionsInternalLR}. 191 */ 192 @GuardedBy("mRestrictionsLock") 193 private final SparseArray<Bundle> mBaseUserRestrictions = new SparseArray<>(); 194 195 /** 196 * Cached user restrictions that are in effect -- i.e. {@link #mBaseUserRestrictions} combined 197 * with device / profile owner restrictions. We'll initialize it lazily; use 198 * {@link #getEffectiveUserRestrictions} to access it. 199 * 200 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 201 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 202 * maybe shared between {@link #mBaseUserRestrictions} and 203 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 204 * (Otherwise we won't be able to detect what restrictions have changed in 205 * {@link #updateUserRestrictionsInternalLR}. 206 */ 207 @GuardedBy("mRestrictionsLock") 208 private final SparseArray<Bundle> mCachedEffectiveUserRestrictions = new SparseArray<>(); 209 210 /** 211 * User restrictions that have already been applied in {@link #applyUserRestrictionsLR}. We 212 * use it to detect restrictions that have changed since the last 213 * {@link #applyUserRestrictionsLR} call. 214 */ 215 @GuardedBy("mRestrictionsLock") 216 private final SparseArray<Bundle> mAppliedUserRestrictions = new SparseArray<>(); 217 218 private final Bundle mGuestRestrictions = new Bundle(); 219 220 /** 221 * Set of user IDs being actively removed. Removed IDs linger in this set 222 * for several seconds to work around a VFS caching issue. 223 */ 224 @GuardedBy("mUsersLock") 225 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 226 227 @GuardedBy("mUsersLock") 228 private int[] mUserIds; 229 private int mNextSerialNumber; 230 private int mUserVersion = 0; 231 232 private IAppOpsService mAppOpsService; 233 234 private final LocalService mLocalService; 235 236 @GuardedBy("mUserRestrictionsListeners") 237 private final ArrayList<UserRestrictionsListener> mUserRestrictionsListeners = 238 new ArrayList<>(); 239 240 private static UserManagerService sInstance; 241 242 public static UserManagerService getInstance() { 243 synchronized (UserManagerService.class) { 244 return sInstance; 245 } 246 } 247 248 /** 249 * Available for testing purposes. 250 */ 251 UserManagerService(File dataDir, File baseUserPath) { 252 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 253 } 254 255 /** 256 * Called by package manager to create the service. This is closely 257 * associated with the package manager, and the given lock is the 258 * package manager's own lock. 259 */ 260 UserManagerService(Context context, PackageManagerService pm, 261 Object installLock, Object packagesLock) { 262 this(context, pm, installLock, packagesLock, 263 Environment.getDataDirectory(), 264 new File(Environment.getDataDirectory(), "user")); 265 } 266 267 /** 268 * Available for testing purposes. 269 */ 270 private UserManagerService(Context context, PackageManagerService pm, 271 Object installLock, Object packagesLock, 272 File dataDir, File baseUserPath) { 273 mContext = context; 274 mPm = pm; 275 mInstallLock = installLock; 276 mPackagesLock = packagesLock; 277 mHandler = new MainHandler(); 278 synchronized (mInstallLock) { 279 synchronized (mPackagesLock) { 280 mUsersDir = new File(dataDir, USER_INFO_DIR); 281 mUsersDir.mkdirs(); 282 // Make zeroth user directory, for services to migrate their files to that location 283 File userZeroDir = new File(mUsersDir, String.valueOf(UserHandle.USER_SYSTEM)); 284 userZeroDir.mkdirs(); 285 FileUtils.setPermissions(mUsersDir.toString(), 286 FileUtils.S_IRWXU|FileUtils.S_IRWXG 287 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 288 -1, -1); 289 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 290 initDefaultGuestRestrictions(); 291 readUserListLILP(); 292 sInstance = this; 293 } 294 } 295 mLocalService = new LocalService(); 296 LocalServices.addService(UserManagerInternal.class, mLocalService); 297 } 298 299 void systemReady() { 300 synchronized (mInstallLock) { 301 synchronized (mPackagesLock) { 302 synchronized (mUsersLock) { 303 // Prune out any partially created/partially removed users. 304 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 305 final int userSize = mUsers.size(); 306 for (int i = 0; i < userSize; i++) { 307 UserInfo ui = mUsers.valueAt(i); 308 if ((ui.partial || ui.guestToRemove) && i != 0) { 309 partials.add(ui); 310 } 311 } 312 final int partialsSize = partials.size(); 313 for (int i = 0; i < partialsSize; i++) { 314 UserInfo ui = partials.get(i); 315 Slog.w(LOG_TAG, "Removing partially created user " + ui.id 316 + " (name=" + ui.name + ")"); 317 removeUserStateLILP(ui.id); 318 } 319 } 320 } 321 } 322 onUserForeground(UserHandle.USER_SYSTEM); 323 mAppOpsService = IAppOpsService.Stub.asInterface( 324 ServiceManager.getService(Context.APP_OPS_SERVICE)); 325 for (int i = 0; i < mUserIds.length; ++i) { 326 final int userId = mUserIds[i]; 327 try { 328 mAppOpsService.setUserRestrictions(getEffectiveUserRestrictions(userId), userId); 329 } catch (RemoteException e) { 330 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 331 } 332 } 333 } 334 335 @Override 336 public UserInfo getPrimaryUser() { 337 checkManageUsersPermission("query users"); 338 synchronized (mUsersLock) { 339 final int userSize = mUsers.size(); 340 for (int i = 0; i < userSize; i++) { 341 UserInfo ui = mUsers.valueAt(i); 342 if (ui.isPrimary()) { 343 return ui; 344 } 345 } 346 } 347 return null; 348 } 349 350 @Override 351 public @NonNull List<UserInfo> getUsers(boolean excludeDying) { 352 checkManageUsersPermission("query users"); 353 synchronized (mUsersLock) { 354 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 355 final int userSize = mUsers.size(); 356 for (int i = 0; i < userSize; i++) { 357 UserInfo ui = mUsers.valueAt(i); 358 if (ui.partial) { 359 continue; 360 } 361 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 362 users.add(ui); 363 } 364 } 365 return users; 366 } 367 } 368 369 @Override 370 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 371 if (userId != UserHandle.getCallingUserId()) { 372 checkManageUsersPermission("getting profiles related to user " + userId); 373 } 374 final long ident = Binder.clearCallingIdentity(); 375 try { 376 synchronized (mUsersLock) { 377 return getProfilesLU(userId, enabledOnly); 378 } 379 } finally { 380 Binder.restoreCallingIdentity(ident); 381 } 382 } 383 384 /** Assume permissions already checked and caller's identity cleared */ 385 private List<UserInfo> getProfilesLU(int userId, boolean enabledOnly) { 386 UserInfo user = getUserInfoLU(userId); 387 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 388 if (user == null) { 389 // Probably a dying user 390 return users; 391 } 392 final int userSize = mUsers.size(); 393 for (int i = 0; i < userSize; i++) { 394 UserInfo profile = mUsers.valueAt(i); 395 if (!isProfileOf(user, profile)) { 396 continue; 397 } 398 if (enabledOnly && !profile.isEnabled()) { 399 continue; 400 } 401 if (mRemovingUserIds.get(profile.id)) { 402 continue; 403 } 404 users.add(profile); 405 } 406 return users; 407 } 408 409 @Override 410 public int getCredentialOwnerProfile(int userHandle) { 411 checkManageUsersPermission("get the credential owner"); 412 if (!mContext.getSystemService(StorageManager.class).isPerUserEncryptionEnabled()) { 413 synchronized (mUsersLock) { 414 UserInfo profileParent = getProfileParentLU(userHandle); 415 if (profileParent != null) { 416 return profileParent.id; 417 } 418 } 419 } 420 421 return userHandle; 422 } 423 424 @Override 425 public boolean isSameProfileGroup(int userId, int otherUserId) { 426 if (userId == otherUserId) return true; 427 checkManageUsersPermission("check if in the same profile group"); 428 synchronized (mPackagesLock) { 429 return isSameProfileGroupLP(userId, otherUserId); 430 } 431 } 432 433 private boolean isSameProfileGroupLP(int userId, int otherUserId) { 434 synchronized (mUsersLock) { 435 UserInfo userInfo = getUserInfoLU(userId); 436 if (userInfo == null || userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 437 return false; 438 } 439 UserInfo otherUserInfo = getUserInfoLU(otherUserId); 440 if (otherUserInfo == null 441 || otherUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 442 return false; 443 } 444 return userInfo.profileGroupId == otherUserInfo.profileGroupId; 445 } 446 } 447 448 @Override 449 public UserInfo getProfileParent(int userHandle) { 450 checkManageUsersPermission("get the profile parent"); 451 synchronized (mUsersLock) { 452 return getProfileParentLU(userHandle); 453 } 454 } 455 456 private UserInfo getProfileParentLU(int userHandle) { 457 UserInfo profile = getUserInfoLU(userHandle); 458 if (profile == null) { 459 return null; 460 } 461 int parentUserId = profile.profileGroupId; 462 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 463 return null; 464 } else { 465 return getUserInfoLU(parentUserId); 466 } 467 } 468 469 private static boolean isProfileOf(UserInfo user, UserInfo profile) { 470 return user.id == profile.id || 471 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 472 && user.profileGroupId == profile.profileGroupId); 473 } 474 475 @Override 476 public void setUserEnabled(int userId) { 477 checkManageUsersPermission("enable user"); 478 synchronized (mPackagesLock) { 479 UserInfo info; 480 synchronized (mUsersLock) { 481 info = getUserInfoLU(userId); 482 } 483 if (info != null && !info.isEnabled()) { 484 info.flags ^= UserInfo.FLAG_DISABLED; 485 writeUserLP(info); 486 } 487 } 488 } 489 490 @Override 491 public UserInfo getUserInfo(int userId) { 492 checkManageUsersPermission("query user"); 493 synchronized (mUsersLock) { 494 return getUserInfoLU(userId); 495 } 496 } 497 498 @Override 499 public boolean isRestricted() { 500 synchronized (mUsersLock) { 501 return getUserInfoLU(UserHandle.getCallingUserId()).isRestricted(); 502 } 503 } 504 505 @Override 506 public boolean canHaveRestrictedProfile(int userId) { 507 checkManageUsersPermission("canHaveRestrictedProfile"); 508 synchronized (mUsersLock) { 509 final UserInfo userInfo = getUserInfoLU(userId); 510 if (userInfo == null || !userInfo.canHaveProfile()) { 511 return false; 512 } 513 if (!userInfo.isAdmin()) { 514 return false; 515 } 516 } 517 DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService( 518 Context.DEVICE_POLICY_SERVICE); 519 // restricted profile can be created if there is no DO set and the admin user has no PO 520 return dpm.getDeviceOwner() == null && dpm.getProfileOwnerAsUser(userId) == null; 521 } 522 523 /* 524 * Should be locked on mUsers before calling this. 525 */ 526 private UserInfo getUserInfoLU(int userId) { 527 UserInfo ui = mUsers.get(userId); 528 // If it is partial and not in the process of being removed, return as unknown user. 529 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 530 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 531 return null; 532 } 533 return ui; 534 } 535 536 /** 537 * Obtains {@link #mUsersLock} and return UserInfo from mUsers. 538 * <p>No permissions checking or any addition checks are made</p> 539 */ 540 private UserInfo getUserInfoNoChecks(int userId) { 541 synchronized (mUsersLock) { 542 return mUsers.get(userId); 543 } 544 } 545 546 /** Called by PackageManagerService */ 547 public boolean exists(int userId) { 548 return getUserInfoNoChecks(userId) != null; 549 } 550 551 @Override 552 public void setUserName(int userId, String name) { 553 checkManageUsersPermission("rename users"); 554 boolean changed = false; 555 synchronized (mPackagesLock) { 556 UserInfo info = getUserInfoNoChecks(userId); 557 if (info == null || info.partial) { 558 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 559 return; 560 } 561 if (name != null && !name.equals(info.name)) { 562 info.name = name; 563 writeUserLP(info); 564 changed = true; 565 } 566 } 567 if (changed) { 568 sendUserInfoChangedBroadcast(userId); 569 } 570 } 571 572 @Override 573 public void setUserIcon(int userId, Bitmap bitmap) { 574 checkManageUsersPermission("update users"); 575 long ident = Binder.clearCallingIdentity(); 576 try { 577 synchronized (mPackagesLock) { 578 UserInfo info = getUserInfoNoChecks(userId); 579 if (info == null || info.partial) { 580 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 581 return; 582 } 583 writeBitmapLP(info, bitmap); 584 writeUserLP(info); 585 } 586 sendUserInfoChangedBroadcast(userId); 587 } finally { 588 Binder.restoreCallingIdentity(ident); 589 } 590 } 591 592 private void sendUserInfoChangedBroadcast(int userId) { 593 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 594 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 595 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 596 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 597 } 598 599 @Override 600 public ParcelFileDescriptor getUserIcon(int userId) { 601 String iconPath; 602 synchronized (mPackagesLock) { 603 UserInfo info = getUserInfoNoChecks(userId); 604 if (info == null || info.partial) { 605 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 606 return null; 607 } 608 int callingGroupId = getUserInfoNoChecks(UserHandle.getCallingUserId()).profileGroupId; 609 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 610 || callingGroupId != info.profileGroupId) { 611 checkManageUsersPermission("get the icon of a user who is not related"); 612 } 613 if (info.iconPath == null) { 614 return null; 615 } 616 iconPath = info.iconPath; 617 } 618 619 try { 620 return ParcelFileDescriptor.open( 621 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 622 } catch (FileNotFoundException e) { 623 Log.e(LOG_TAG, "Couldn't find icon file", e); 624 } 625 return null; 626 } 627 628 public void makeInitialized(int userId) { 629 checkManageUsersPermission("makeInitialized"); 630 synchronized (mPackagesLock) { 631 UserInfo info = getUserInfoNoChecks(userId); 632 if (info == null || info.partial) { 633 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 634 // TODO Check if we should return here instead of a null check below 635 } 636 if (info != null && (info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 637 info.flags |= UserInfo.FLAG_INITIALIZED; 638 scheduleWriteUser(info); 639 } 640 } 641 } 642 643 /** 644 * If default guest restrictions haven't been initialized yet, add the basic 645 * restrictions. 646 */ 647 private void initDefaultGuestRestrictions() { 648 if (mGuestRestrictions.isEmpty()) { 649 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 650 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 651 } 652 } 653 654 @Override 655 public Bundle getDefaultGuestRestrictions() { 656 checkManageUsersPermission("getDefaultGuestRestrictions"); 657 // TODO Switch to mGuestRestrictions for locking 658 synchronized (mPackagesLock) { 659 return new Bundle(mGuestRestrictions); 660 } 661 } 662 663 @Override 664 public void setDefaultGuestRestrictions(Bundle restrictions) { 665 checkManageUsersPermission("setDefaultGuestRestrictions"); 666 synchronized (mInstallLock) { 667 synchronized (mPackagesLock) { 668 mGuestRestrictions.clear(); 669 mGuestRestrictions.putAll(restrictions); 670 writeUserListLILP(); 671 } 672 } 673 } 674 675 @GuardedBy("mRestrictionsLock") 676 private Bundle computeEffectiveUserRestrictionsLR(int userId) { 677 final DevicePolicyManagerInternal dpmi = 678 LocalServices.getService(DevicePolicyManagerInternal.class); 679 final Bundle systemRestrictions = mBaseUserRestrictions.get(userId); 680 681 final Bundle effective; 682 if (dpmi == null) { 683 // TODO Make sure it's because DPMS is disabled and not because we called it too early. 684 effective = systemRestrictions; 685 } else { 686 effective = dpmi.getComposedUserRestrictions(userId, systemRestrictions); 687 } 688 return effective; 689 } 690 691 @GuardedBy("mRestrictionsLock") 692 private void invalidateEffectiveUserRestrictionsLR(int userId) { 693 if (DBG) { 694 Log.d(LOG_TAG, "invalidateEffectiveUserRestrictions userId=" + userId); 695 } 696 mCachedEffectiveUserRestrictions.remove(userId); 697 } 698 699 private Bundle getEffectiveUserRestrictions(int userId) { 700 synchronized (mRestrictionsLock) { 701 Bundle restrictions = mCachedEffectiveUserRestrictions.get(userId); 702 if (restrictions == null) { 703 restrictions = computeEffectiveUserRestrictionsLR(userId); 704 mCachedEffectiveUserRestrictions.put(userId, restrictions); 705 } 706 return restrictions; 707 } 708 } 709 710 /** @return a specific user restriction that's in effect currently. */ 711 @Override 712 public boolean hasUserRestriction(String restrictionKey, int userId) { 713 Bundle restrictions = getEffectiveUserRestrictions(userId); 714 return restrictions != null && restrictions.getBoolean(restrictionKey); 715 } 716 717 /** 718 * @return UserRestrictions that are in effect currently. This always returns a new 719 * {@link Bundle}. 720 */ 721 @Override 722 public Bundle getUserRestrictions(int userId) { 723 Bundle restrictions = getEffectiveUserRestrictions(userId); 724 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 725 } 726 727 @Override 728 public void setUserRestriction(String key, boolean value, int userId) { 729 checkManageUsersPermission("setUserRestriction"); 730 if (!UserRestrictionsUtils.SYSTEM_CONTROLLED_USER_RESTRICTIONS.contains(key)) { 731 setUserRestrictionNoCheck(key, value, userId); 732 } 733 } 734 735 @Override 736 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 737 checkSystemOrRoot("setSystemControlledUserRestriction"); 738 setUserRestrictionNoCheck(key, value, userId); 739 } 740 741 private void setUserRestrictionNoCheck(String key, boolean value, int userId) { 742 synchronized (mRestrictionsLock) { 743 // Note we can't modify Bundles stored in mBaseUserRestrictions directly, so create 744 // a copy. 745 final Bundle newRestrictions = new Bundle(); 746 UserRestrictionsUtils.merge(newRestrictions, mBaseUserRestrictions.get(userId)); 747 newRestrictions.putBoolean(key, value); 748 749 updateUserRestrictionsInternalLR(newRestrictions, userId); 750 } 751 } 752 753 /** 754 * Optionally updating user restrictions, calculate the effective user restrictions by 755 * consulting {@link com.android.server.devicepolicy.DevicePolicyManagerService} and also 756 * apply it to {@link com.android.server.AppOpsService}. 757 * TODO applyUserRestrictionsLocked() should also apply to system settings. 758 * 759 * @param newRestrictions User restrictions to set. If null, only the effective restrictions 760 * will be updated. Note don't pass an existing Bundle in {@link #mBaseUserRestrictions} 761 * or {@link #mCachedEffectiveUserRestrictions}; that'll most likely cause a sub 762 * @param userId target user ID. 763 */ 764 @GuardedBy("mRestrictionsLock") 765 private void updateUserRestrictionsInternalLR( 766 @Nullable Bundle newRestrictions, int userId) { 767 if (DBG) { 768 Log.d(LOG_TAG, "updateUserRestrictionsInternalLocked userId=" + userId 769 + " bundle=" + newRestrictions); 770 } 771 // Update system restrictions. 772 if (newRestrictions != null) { 773 // If newRestrictions == the current one, it's probably a bug. 774 Preconditions.checkState(mBaseUserRestrictions.get(userId) != newRestrictions); 775 Preconditions.checkState(mCachedEffectiveUserRestrictions.get(userId) 776 != newRestrictions); 777 mBaseUserRestrictions.put(userId, newRestrictions); 778 scheduleWriteUser(mUsers.get(userId)); 779 } 780 781 final Bundle effective = computeEffectiveUserRestrictionsLR(userId); 782 783 mCachedEffectiveUserRestrictions.put(userId, effective); 784 785 applyUserRestrictionsLR(userId, effective); 786 } 787 788 @GuardedBy("mRestrictionsLock") 789 private void applyUserRestrictionsLR(int userId, Bundle newRestrictions) { 790 if (newRestrictions == null) { 791 newRestrictions = Bundle.EMPTY; 792 } 793 794 Bundle prevRestrictions = mAppliedUserRestrictions.get(userId); 795 if (prevRestrictions == null) { 796 prevRestrictions = Bundle.EMPTY; 797 } 798 799 if (DBG) { 800 Log.d(LOG_TAG, "applyUserRestrictionsRL userId=" + userId 801 + " new=" + newRestrictions + " prev=" + prevRestrictions); 802 } 803 804 final long token = Binder.clearCallingIdentity(); 805 try { 806 mAppOpsService.setUserRestrictions(newRestrictions, userId); 807 } catch (RemoteException e) { 808 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 809 } finally { 810 Binder.restoreCallingIdentity(token); 811 } 812 813 UserRestrictionsUtils.applyUserRestrictionsLR( 814 mContext, userId, newRestrictions, prevRestrictions); 815 816 notifyUserRestrictionsListeners(userId, newRestrictions, prevRestrictions); 817 818 mAppliedUserRestrictions.put(userId, new Bundle(newRestrictions)); 819 } 820 821 private void notifyUserRestrictionsListeners(final int userId, 822 Bundle newRestrictions, Bundle prevRestrictions) { 823 824 final Bundle newRestrictionsFinal = new Bundle(newRestrictions); 825 final Bundle prevRestrictionsFinal = new Bundle(prevRestrictions); 826 827 mHandler.post(new Runnable() { 828 @Override 829 public void run() { 830 final UserRestrictionsListener[] listeners; 831 synchronized (mUserRestrictionsListeners) { 832 listeners = new UserRestrictionsListener[mUserRestrictionsListeners.size()]; 833 mUserRestrictionsListeners.toArray(listeners); 834 } 835 for (int i = 0; i < listeners.length; i++) { 836 listeners[i].onUserRestrictionsChanged(userId, 837 newRestrictionsFinal, prevRestrictionsFinal); 838 } 839 } 840 }); 841 } 842 843 @GuardedBy("mRestrictionsLock") 844 private void updateEffectiveUserRestrictionsLR(int userId) { 845 updateUserRestrictionsInternalLR(null, userId); 846 } 847 848 @GuardedBy("mRestrictionsLock") 849 private void updateEffectiveUserRestrictionsForAllUsersLR() { 850 // First, invalidate all cached values. 851 mCachedEffectiveUserRestrictions.clear(); 852 853 // We don't want to call into ActivityManagerNative while taking a lock, so we'll call 854 // it on a handler. 855 final Runnable r = new Runnable() { 856 @Override 857 public void run() { 858 // Then get the list of running users. 859 final int[] runningUsers; 860 try { 861 runningUsers = ActivityManagerNative.getDefault().getRunningUserIds(); 862 } catch (RemoteException e) { 863 Log.w(LOG_TAG, "Unable to access ActivityManagerNative"); 864 return; 865 } 866 // Then re-calculate the effective restrictions and apply, only for running users. 867 // It's okay if a new user has started after the getRunningUserIds() call, 868 // because we'll do the same thing (re-calculate the restrictions and apply) 869 // when we start a user. 870 // TODO: "Apply restrictions upon user start hasn't been implemented. Implement it. 871 synchronized (mRestrictionsLock) { 872 for (int i = 0; i < runningUsers.length; i++) { 873 updateUserRestrictionsInternalLR(null, runningUsers[i]); 874 } 875 } 876 } 877 }; 878 mHandler.post(r); 879 } 880 881 /** 882 * Check if we've hit the limit of how many users can be created. 883 */ 884 private boolean isUserLimitReached() { 885 int count; 886 synchronized (mUsersLock) { 887 count = getAliveUsersExcludingGuestsCountLU(); 888 } 889 return count >= UserManager.getMaxSupportedUsers(); 890 } 891 892 @Override 893 public boolean canAddMoreManagedProfiles(int userId, boolean allowedToRemoveOne) { 894 checkManageUsersPermission("check if more managed profiles can be added."); 895 if (ActivityManager.isLowRamDeviceStatic()) { 896 return false; 897 } 898 if (!mContext.getPackageManager().hasSystemFeature( 899 PackageManager.FEATURE_MANAGED_USERS)) { 900 return false; 901 } 902 // Limit number of managed profiles that can be created 903 final int managedProfilesCount = getProfiles(userId, true).size() - 1; 904 final int profilesRemovedCount = managedProfilesCount > 0 && allowedToRemoveOne ? 1 : 0; 905 if (managedProfilesCount - profilesRemovedCount >= MAX_MANAGED_PROFILES) { 906 return false; 907 } 908 synchronized(mUsersLock) { 909 UserInfo userInfo = getUserInfoLU(userId); 910 if (!userInfo.canHaveProfile()) { 911 return false; 912 } 913 int usersCountAfterRemoving = getAliveUsersExcludingGuestsCountLU() 914 - profilesRemovedCount; 915 // We allow creating a managed profile in the special case where there is only one user. 916 return usersCountAfterRemoving == 1 917 || usersCountAfterRemoving < UserManager.getMaxSupportedUsers(); 918 } 919 } 920 921 private int getAliveUsersExcludingGuestsCountLU() { 922 int aliveUserCount = 0; 923 final int totalUserCount = mUsers.size(); 924 // Skip over users being removed 925 for (int i = 0; i < totalUserCount; i++) { 926 UserInfo user = mUsers.valueAt(i); 927 if (!mRemovingUserIds.get(user.id) 928 && !user.isGuest() && !user.partial) { 929 aliveUserCount++; 930 } 931 } 932 return aliveUserCount; 933 } 934 935 /** 936 * Enforces that only the system UID or root's UID or apps that have the 937 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 938 * permission can make certain calls to the UserManager. 939 * 940 * @param message used as message if SecurityException is thrown 941 * @throws SecurityException if the caller is not system or root 942 */ 943 private static final void checkManageUsersPermission(String message) { 944 final int uid = Binder.getCallingUid(); 945 if (uid != Process.SYSTEM_UID && uid != 0 946 && ActivityManager.checkComponentPermission( 947 android.Manifest.permission.MANAGE_USERS, 948 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 949 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 950 } 951 } 952 953 private static void checkSystemOrRoot(String message) { 954 final int uid = Binder.getCallingUid(); 955 if (uid != Process.SYSTEM_UID && uid != 0) { 956 throw new SecurityException("Only system may call: " + message); 957 } 958 } 959 960 private void writeBitmapLP(UserInfo info, Bitmap bitmap) { 961 try { 962 File dir = new File(mUsersDir, Integer.toString(info.id)); 963 File file = new File(dir, USER_PHOTO_FILENAME); 964 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 965 if (!dir.exists()) { 966 dir.mkdir(); 967 FileUtils.setPermissions( 968 dir.getPath(), 969 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 970 -1, -1); 971 } 972 FileOutputStream os; 973 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 974 && tmp.renameTo(file)) { 975 info.iconPath = file.getAbsolutePath(); 976 } 977 try { 978 os.close(); 979 } catch (IOException ioe) { 980 // What the ... ! 981 } 982 tmp.delete(); 983 } catch (FileNotFoundException e) { 984 Slog.w(LOG_TAG, "Error setting photo for user ", e); 985 } 986 } 987 988 /** 989 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 990 * cache it elsewhere. 991 * @return the array of user ids. 992 */ 993 public int[] getUserIds() { 994 synchronized (mUsersLock) { 995 return mUserIds; 996 } 997 } 998 999 private void readUserListLILP() { 1000 if (!mUserListFile.exists()) { 1001 fallbackToSingleUserLILP(); 1002 return; 1003 } 1004 FileInputStream fis = null; 1005 AtomicFile userListFile = new AtomicFile(mUserListFile); 1006 try { 1007 fis = userListFile.openRead(); 1008 XmlPullParser parser = Xml.newPullParser(); 1009 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1010 int type; 1011 while ((type = parser.next()) != XmlPullParser.START_TAG 1012 && type != XmlPullParser.END_DOCUMENT) { 1013 ; 1014 } 1015 1016 if (type != XmlPullParser.START_TAG) { 1017 Slog.e(LOG_TAG, "Unable to read user list"); 1018 fallbackToSingleUserLILP(); 1019 return; 1020 } 1021 1022 mNextSerialNumber = -1; 1023 if (parser.getName().equals(TAG_USERS)) { 1024 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 1025 if (lastSerialNumber != null) { 1026 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 1027 } 1028 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 1029 if (versionNumber != null) { 1030 mUserVersion = Integer.parseInt(versionNumber); 1031 } 1032 } 1033 1034 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1035 if (type == XmlPullParser.START_TAG) { 1036 final String name = parser.getName(); 1037 if (name.equals(TAG_USER)) { 1038 String id = parser.getAttributeValue(null, ATTR_ID); 1039 UserInfo user = readUserLILP(Integer.parseInt(id)); 1040 1041 if (user != null) { 1042 synchronized (mUsersLock) { 1043 mUsers.put(user.id, user); 1044 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 1045 mNextSerialNumber = user.id + 1; 1046 } 1047 } 1048 } 1049 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 1050 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1051 && type != XmlPullParser.END_TAG) { 1052 if (type == XmlPullParser.START_TAG) { 1053 if (parser.getName().equals(TAG_RESTRICTIONS)) { 1054 UserRestrictionsUtils 1055 .readRestrictions(parser, mGuestRestrictions); 1056 } 1057 break; 1058 } 1059 } 1060 } 1061 } 1062 } 1063 updateUserIds(); 1064 upgradeIfNecessaryLILP(); 1065 } catch (IOException ioe) { 1066 fallbackToSingleUserLILP(); 1067 } catch (XmlPullParserException pe) { 1068 fallbackToSingleUserLILP(); 1069 } finally { 1070 if (fis != null) { 1071 try { 1072 fis.close(); 1073 } catch (IOException e) { 1074 } 1075 } 1076 } 1077 } 1078 1079 /** 1080 * Upgrade steps between versions, either for fixing bugs or changing the data format. 1081 */ 1082 private void upgradeIfNecessaryLILP() { 1083 int userVersion = mUserVersion; 1084 if (userVersion < 1) { 1085 // Assign a proper name for the owner, if not initialized correctly before 1086 UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM); 1087 if ("Primary".equals(user.name)) { 1088 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 1089 scheduleWriteUser(user); 1090 } 1091 userVersion = 1; 1092 } 1093 1094 if (userVersion < 2) { 1095 // Owner should be marked as initialized 1096 UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM); 1097 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 1098 user.flags |= UserInfo.FLAG_INITIALIZED; 1099 scheduleWriteUser(user); 1100 } 1101 userVersion = 2; 1102 } 1103 1104 1105 if (userVersion < 4) { 1106 userVersion = 4; 1107 } 1108 1109 if (userVersion < 5) { 1110 initDefaultGuestRestrictions(); 1111 userVersion = 5; 1112 } 1113 1114 if (userVersion < 6) { 1115 final boolean splitSystemUser = UserManager.isSplitSystemUser(); 1116 synchronized (mUsersLock) { 1117 for (int i = 0; i < mUsers.size(); i++) { 1118 UserInfo user = mUsers.valueAt(i); 1119 // In non-split mode, only user 0 can have restricted profiles 1120 if (!splitSystemUser && user.isRestricted() 1121 && (user.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID)) { 1122 user.restrictedProfileParentId = UserHandle.USER_SYSTEM; 1123 scheduleWriteUser(user); 1124 } 1125 } 1126 } 1127 userVersion = 6; 1128 } 1129 1130 if (userVersion < USER_VERSION) { 1131 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 1132 + USER_VERSION); 1133 } else { 1134 mUserVersion = userVersion; 1135 writeUserListLILP(); 1136 } 1137 } 1138 1139 private void fallbackToSingleUserLILP() { 1140 int flags = UserInfo.FLAG_INITIALIZED; 1141 // In split system user mode, the admin and primary flags are assigned to the first human 1142 // user. 1143 if (!UserManager.isSplitSystemUser()) { 1144 flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY; 1145 } 1146 // Create the system user 1147 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 1148 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 1149 flags); 1150 synchronized (mUsersLock) { 1151 mUsers.put(system.id, system); 1152 } 1153 mNextSerialNumber = MIN_USER_ID; 1154 mUserVersion = USER_VERSION; 1155 1156 Bundle restrictions = new Bundle(); 1157 synchronized (mRestrictionsLock) { 1158 mBaseUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 1159 } 1160 1161 updateUserIds(); 1162 initDefaultGuestRestrictions(); 1163 1164 writeUserListLILP(); 1165 writeUserLP(system); 1166 } 1167 1168 private void scheduleWriteUser(UserInfo userInfo) { 1169 // No need to wrap it within a lock -- worst case, we'll just post the same message 1170 // twice. 1171 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 1172 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 1173 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 1174 } 1175 } 1176 1177 /* 1178 * Writes the user file in this format: 1179 * 1180 * <user flags="20039023" id="0"> 1181 * <name>Primary</name> 1182 * </user> 1183 */ 1184 private void writeUserLP(UserInfo userInfo) { 1185 FileOutputStream fos = null; 1186 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 1187 try { 1188 fos = userFile.startWrite(); 1189 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1190 1191 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1192 final XmlSerializer serializer = new FastXmlSerializer(); 1193 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1194 serializer.startDocument(null, true); 1195 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1196 1197 serializer.startTag(null, TAG_USER); 1198 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 1199 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 1200 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 1201 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 1202 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 1203 Long.toString(userInfo.lastLoggedInTime)); 1204 if (userInfo.iconPath != null) { 1205 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 1206 } 1207 if (userInfo.partial) { 1208 serializer.attribute(null, ATTR_PARTIAL, "true"); 1209 } 1210 if (userInfo.guestToRemove) { 1211 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 1212 } 1213 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 1214 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 1215 Integer.toString(userInfo.profileGroupId)); 1216 } 1217 if (userInfo.restrictedProfileParentId != UserInfo.NO_PROFILE_GROUP_ID) { 1218 serializer.attribute(null, ATTR_RESTRICTED_PROFILE_PARENT_ID, 1219 Integer.toString(userInfo.restrictedProfileParentId)); 1220 } 1221 serializer.startTag(null, TAG_NAME); 1222 serializer.text(userInfo.name); 1223 serializer.endTag(null, TAG_NAME); 1224 Bundle restrictions; 1225 synchronized (mRestrictionsLock) { 1226 restrictions = mBaseUserRestrictions.get(userInfo.id); 1227 } 1228 if (restrictions != null) { 1229 UserRestrictionsUtils 1230 .writeRestrictions(serializer, restrictions, TAG_RESTRICTIONS); 1231 } 1232 serializer.endTag(null, TAG_USER); 1233 1234 serializer.endDocument(); 1235 userFile.finishWrite(fos); 1236 } catch (Exception ioe) { 1237 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 1238 userFile.failWrite(fos); 1239 } 1240 } 1241 1242 /* 1243 * Writes the user list file in this format: 1244 * 1245 * <users nextSerialNumber="3"> 1246 * <user id="0"></user> 1247 * <user id="2"></user> 1248 * </users> 1249 */ 1250 private void writeUserListLILP() { 1251 // TODO Investigate removing a dependency on mInstallLock 1252 FileOutputStream fos = null; 1253 AtomicFile userListFile = new AtomicFile(mUserListFile); 1254 try { 1255 fos = userListFile.startWrite(); 1256 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1257 1258 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1259 final XmlSerializer serializer = new FastXmlSerializer(); 1260 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1261 serializer.startDocument(null, true); 1262 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1263 1264 serializer.startTag(null, TAG_USERS); 1265 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 1266 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 1267 1268 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 1269 UserRestrictionsUtils 1270 .writeRestrictions(serializer, mGuestRestrictions, TAG_RESTRICTIONS); 1271 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 1272 int[] userIdsToWrite; 1273 synchronized (mUsersLock) { 1274 userIdsToWrite = new int[mUsers.size()]; 1275 for (int i = 0; i < userIdsToWrite.length; i++) { 1276 UserInfo user = mUsers.valueAt(i); 1277 userIdsToWrite[i] = user.id; 1278 } 1279 } 1280 for (int id : userIdsToWrite) { 1281 serializer.startTag(null, TAG_USER); 1282 serializer.attribute(null, ATTR_ID, Integer.toString(id)); 1283 serializer.endTag(null, TAG_USER); 1284 } 1285 1286 serializer.endTag(null, TAG_USERS); 1287 1288 serializer.endDocument(); 1289 userListFile.finishWrite(fos); 1290 } catch (Exception e) { 1291 userListFile.failWrite(fos); 1292 Slog.e(LOG_TAG, "Error writing user list"); 1293 } 1294 } 1295 1296 private UserInfo readUserLILP(int id) { 1297 int flags = 0; 1298 int serialNumber = id; 1299 String name = null; 1300 String iconPath = null; 1301 long creationTime = 0L; 1302 long lastLoggedInTime = 0L; 1303 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1304 int restrictedProfileParentId = UserInfo.NO_PROFILE_GROUP_ID; 1305 boolean partial = false; 1306 boolean guestToRemove = false; 1307 Bundle restrictions = new Bundle(); 1308 1309 FileInputStream fis = null; 1310 try { 1311 AtomicFile userFile = 1312 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1313 fis = userFile.openRead(); 1314 XmlPullParser parser = Xml.newPullParser(); 1315 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1316 int type; 1317 while ((type = parser.next()) != XmlPullParser.START_TAG 1318 && type != XmlPullParser.END_DOCUMENT) { 1319 ; 1320 } 1321 1322 if (type != XmlPullParser.START_TAG) { 1323 Slog.e(LOG_TAG, "Unable to read user " + id); 1324 return null; 1325 } 1326 1327 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1328 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1329 if (storedId != id) { 1330 Slog.e(LOG_TAG, "User id does not match the file name"); 1331 return null; 1332 } 1333 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1334 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1335 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1336 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1337 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1338 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1339 UserInfo.NO_PROFILE_GROUP_ID); 1340 restrictedProfileParentId = readIntAttribute(parser, 1341 ATTR_RESTRICTED_PROFILE_PARENT_ID, UserInfo.NO_PROFILE_GROUP_ID); 1342 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1343 if ("true".equals(valueString)) { 1344 partial = true; 1345 } 1346 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1347 if ("true".equals(valueString)) { 1348 guestToRemove = true; 1349 } 1350 1351 int outerDepth = parser.getDepth(); 1352 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1353 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1354 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1355 continue; 1356 } 1357 String tag = parser.getName(); 1358 if (TAG_NAME.equals(tag)) { 1359 type = parser.next(); 1360 if (type == XmlPullParser.TEXT) { 1361 name = parser.getText(); 1362 } 1363 } else if (TAG_RESTRICTIONS.equals(tag)) { 1364 UserRestrictionsUtils.readRestrictions(parser, restrictions); 1365 } 1366 } 1367 } 1368 1369 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1370 userInfo.serialNumber = serialNumber; 1371 userInfo.creationTime = creationTime; 1372 userInfo.lastLoggedInTime = lastLoggedInTime; 1373 userInfo.partial = partial; 1374 userInfo.guestToRemove = guestToRemove; 1375 userInfo.profileGroupId = profileGroupId; 1376 userInfo.restrictedProfileParentId = restrictedProfileParentId; 1377 synchronized (mRestrictionsLock) { 1378 mBaseUserRestrictions.append(id, restrictions); 1379 } 1380 return userInfo; 1381 1382 } catch (IOException ioe) { 1383 } catch (XmlPullParserException pe) { 1384 } finally { 1385 if (fis != null) { 1386 try { 1387 fis.close(); 1388 } catch (IOException e) { 1389 } 1390 } 1391 } 1392 return null; 1393 } 1394 1395 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1396 String valueString = parser.getAttributeValue(null, attr); 1397 if (valueString == null) return defaultValue; 1398 try { 1399 return Integer.parseInt(valueString); 1400 } catch (NumberFormatException nfe) { 1401 return defaultValue; 1402 } 1403 } 1404 1405 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1406 String valueString = parser.getAttributeValue(null, attr); 1407 if (valueString == null) return defaultValue; 1408 try { 1409 return Long.parseLong(valueString); 1410 } catch (NumberFormatException nfe) { 1411 return defaultValue; 1412 } 1413 } 1414 1415 private boolean isPackageInstalled(String pkg, int userId) { 1416 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1417 PackageManager.GET_UNINSTALLED_PACKAGES, 1418 userId); 1419 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1420 return false; 1421 } 1422 return true; 1423 } 1424 1425 /** 1426 * Removes all the restrictions files (res_<packagename>) for a given user. 1427 * Does not do any permissions checking. 1428 */ 1429 private void cleanAppRestrictions(int userId) { 1430 synchronized (mPackagesLock) { 1431 File dir = Environment.getUserSystemDirectory(userId); 1432 String[] files = dir.list(); 1433 if (files == null) return; 1434 for (String fileName : files) { 1435 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1436 File resFile = new File(dir, fileName); 1437 if (resFile.exists()) { 1438 resFile.delete(); 1439 } 1440 } 1441 } 1442 } 1443 } 1444 1445 /** 1446 * Removes the app restrictions file for a specific package and user id, if it exists. 1447 */ 1448 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1449 synchronized (mPackagesLock) { 1450 File dir = Environment.getUserSystemDirectory(userId); 1451 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1452 if (resFile.exists()) { 1453 resFile.delete(); 1454 } 1455 } 1456 } 1457 1458 @Override 1459 public UserInfo createProfileForUser(String name, int flags, int userId) { 1460 checkManageUsersPermission("Only the system can create users"); 1461 return createUserInternal(name, flags, userId); 1462 } 1463 1464 @Override 1465 public UserInfo createUser(String name, int flags) { 1466 checkManageUsersPermission("Only the system can create users"); 1467 return createUserInternal(name, flags, UserHandle.USER_NULL); 1468 } 1469 1470 private UserInfo createUserInternal(String name, int flags, int parentId) { 1471 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1472 UserManager.DISALLOW_ADD_USER, false)) { 1473 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1474 return null; 1475 } 1476 if (ActivityManager.isLowRamDeviceStatic()) { 1477 return null; 1478 } 1479 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1480 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1481 final boolean isRestricted = (flags & UserInfo.FLAG_RESTRICTED) != 0; 1482 final long ident = Binder.clearCallingIdentity(); 1483 UserInfo userInfo = null; 1484 final int userId; 1485 try { 1486 synchronized (mInstallLock) { 1487 synchronized (mPackagesLock) { 1488 UserInfo parent = null; 1489 if (parentId != UserHandle.USER_NULL) { 1490 synchronized (mUsersLock) { 1491 parent = getUserInfoLU(parentId); 1492 } 1493 if (parent == null) return null; 1494 } 1495 if (isManagedProfile && !canAddMoreManagedProfiles(parentId, false)) { 1496 Log.e(LOG_TAG, "Cannot add more managed profiles for user " + parentId); 1497 return null; 1498 } 1499 if (!isGuest && !isManagedProfile && isUserLimitReached()) { 1500 // If we're not adding a guest user or a managed profile and the limit has 1501 // been reached, cannot add a user. 1502 return null; 1503 } 1504 // If we're adding a guest and there already exists one, bail. 1505 if (isGuest && findCurrentGuestUser() != null) { 1506 return null; 1507 } 1508 // In legacy mode, restricted profile's parent can only be the owner user 1509 if (isRestricted && !UserManager.isSplitSystemUser() 1510 && (parentId != UserHandle.USER_SYSTEM)) { 1511 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1512 return null; 1513 } 1514 if (isRestricted && UserManager.isSplitSystemUser()) { 1515 if (parent == null) { 1516 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be " 1517 + "specified"); 1518 return null; 1519 } 1520 if (!parent.canHaveProfile()) { 1521 Log.w(LOG_TAG, "Cannot add restricted profile - profiles cannot be " 1522 + "created for the specified parent user id " + parentId); 1523 return null; 1524 } 1525 } 1526 // In split system user mode, we assign the first human user the primary flag. 1527 // And if there is no device owner, we also assign the admin flag to primary 1528 // user. 1529 if (UserManager.isSplitSystemUser() 1530 && !isGuest && !isManagedProfile && getPrimaryUser() == null) { 1531 flags |= UserInfo.FLAG_PRIMARY; 1532 DevicePolicyManager devicePolicyManager = (DevicePolicyManager) 1533 mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); 1534 if (devicePolicyManager == null 1535 || devicePolicyManager.getDeviceOwner() == null) { 1536 flags |= UserInfo.FLAG_ADMIN; 1537 } 1538 } 1539 userId = getNextAvailableId(); 1540 userInfo = new UserInfo(userId, name, null, flags); 1541 userInfo.serialNumber = mNextSerialNumber++; 1542 long now = System.currentTimeMillis(); 1543 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1544 userInfo.partial = true; 1545 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1546 mUsers.put(userId, userInfo); 1547 writeUserListLILP(); 1548 if (parent != null) { 1549 if (isManagedProfile) { 1550 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1551 parent.profileGroupId = parent.id; 1552 scheduleWriteUser(parent); 1553 } 1554 userInfo.profileGroupId = parent.profileGroupId; 1555 } else if (isRestricted) { 1556 if (!parent.canHaveProfile()) { 1557 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1558 } 1559 if (parent.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID) { 1560 parent.restrictedProfileParentId = parent.id; 1561 scheduleWriteUser(parent); 1562 } 1563 userInfo.restrictedProfileParentId = parent.restrictedProfileParentId; 1564 } 1565 } 1566 1567 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1568 storage.createUserKey(userId, userInfo.serialNumber); 1569 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1570 final String volumeUuid = vol.getFsUuid(); 1571 try { 1572 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1573 userId); 1574 storage.prepareUserStorage(volumeUuid, userId, userInfo.serialNumber); 1575 enforceSerialNumber(userDir, userInfo.serialNumber); 1576 } catch (IOException e) { 1577 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1578 } 1579 } 1580 mPm.createNewUserLILPw(userId); 1581 userInfo.partial = false; 1582 scheduleWriteUser(userInfo); 1583 updateUserIds(); 1584 Bundle restrictions = new Bundle(); 1585 synchronized (mRestrictionsLock) { 1586 mBaseUserRestrictions.append(userId, restrictions); 1587 } 1588 } 1589 } 1590 mPm.newUserCreated(userId); 1591 if (userInfo != null) { 1592 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1593 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1594 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1595 android.Manifest.permission.MANAGE_USERS); 1596 } 1597 } finally { 1598 Binder.restoreCallingIdentity(ident); 1599 } 1600 return userInfo; 1601 } 1602 1603 /** 1604 * @hide 1605 */ 1606 public UserInfo createRestrictedProfile(String name, int parentUserId) { 1607 checkManageUsersPermission("setupRestrictedProfile"); 1608 final UserInfo user = createProfileForUser(name, UserInfo.FLAG_RESTRICTED, parentUserId); 1609 if (user == null) { 1610 return null; 1611 } 1612 setUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS, true, user.id); 1613 // Change the setting before applying the DISALLOW_SHARE_LOCATION restriction, otherwise 1614 // the putIntForUser() will fail. 1615 android.provider.Settings.Secure.putIntForUser(mContext.getContentResolver(), 1616 android.provider.Settings.Secure.LOCATION_MODE, 1617 android.provider.Settings.Secure.LOCATION_MODE_OFF, user.id); 1618 setUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, true, user.id); 1619 return user; 1620 } 1621 1622 /** 1623 * Find the current guest user. If the Guest user is partial, 1624 * then do not include it in the results as it is about to die. 1625 */ 1626 private UserInfo findCurrentGuestUser() { 1627 synchronized (mUsersLock) { 1628 final int size = mUsers.size(); 1629 for (int i = 0; i < size; i++) { 1630 final UserInfo user = mUsers.valueAt(i); 1631 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1632 return user; 1633 } 1634 } 1635 } 1636 return null; 1637 } 1638 1639 /** 1640 * Mark this guest user for deletion to allow us to create another guest 1641 * and switch to that user before actually removing this guest. 1642 * @param userHandle the userid of the current guest 1643 * @return whether the user could be marked for deletion 1644 */ 1645 public boolean markGuestForDeletion(int userHandle) { 1646 checkManageUsersPermission("Only the system can remove users"); 1647 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1648 UserManager.DISALLOW_REMOVE_USER, false)) { 1649 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1650 return false; 1651 } 1652 1653 long ident = Binder.clearCallingIdentity(); 1654 try { 1655 final UserInfo user; 1656 synchronized (mPackagesLock) { 1657 synchronized (mUsersLock) { 1658 user = mUsers.get(userHandle); 1659 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1660 return false; 1661 } 1662 } 1663 if (!user.isGuest()) { 1664 return false; 1665 } 1666 // We set this to a guest user that is to be removed. This is a temporary state 1667 // where we are allowed to add new Guest users, even if this one is still not 1668 // removed. This user will still show up in getUserInfo() calls. 1669 // If we don't get around to removing this Guest user, it will be purged on next 1670 // startup. 1671 user.guestToRemove = true; 1672 // Mark it as disabled, so that it isn't returned any more when 1673 // profiles are queried. 1674 user.flags |= UserInfo.FLAG_DISABLED; 1675 writeUserLP(user); 1676 } 1677 } finally { 1678 Binder.restoreCallingIdentity(ident); 1679 } 1680 return true; 1681 } 1682 1683 /** 1684 * Removes a user and all data directories created for that user. This method should be called 1685 * after the user's processes have been terminated. 1686 * @param userHandle the user's id 1687 */ 1688 public boolean removeUser(int userHandle) { 1689 checkManageUsersPermission("Only the system can remove users"); 1690 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1691 UserManager.DISALLOW_REMOVE_USER, false)) { 1692 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1693 return false; 1694 } 1695 1696 long ident = Binder.clearCallingIdentity(); 1697 try { 1698 final UserInfo user; 1699 int currentUser = ActivityManager.getCurrentUser(); 1700 if (currentUser == userHandle) { 1701 Log.w(LOG_TAG, "Current user cannot be removed"); 1702 return false; 1703 } 1704 synchronized (mPackagesLock) { 1705 synchronized (mUsersLock) { 1706 user = mUsers.get(userHandle); 1707 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1708 return false; 1709 } 1710 1711 // We remember deleted user IDs to prevent them from being 1712 // reused during the current boot; they can still be reused 1713 // after a reboot. 1714 mRemovingUserIds.put(userHandle, true); 1715 } 1716 1717 try { 1718 mAppOpsService.removeUser(userHandle); 1719 } catch (RemoteException e) { 1720 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1721 } 1722 // Set this to a partially created user, so that the user will be purged 1723 // on next startup, in case the runtime stops now before stopping and 1724 // removing the user completely. 1725 user.partial = true; 1726 // Mark it as disabled, so that it isn't returned any more when 1727 // profiles are queried. 1728 user.flags |= UserInfo.FLAG_DISABLED; 1729 writeUserLP(user); 1730 } 1731 1732 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1733 && user.isManagedProfile()) { 1734 // Send broadcast to notify system that the user removed was a 1735 // managed user. 1736 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1737 } 1738 1739 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1740 int res; 1741 try { 1742 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1743 new IStopUserCallback.Stub() { 1744 @Override 1745 public void userStopped(int userId) { 1746 finishRemoveUser(userId); 1747 } 1748 @Override 1749 public void userStopAborted(int userId) { 1750 } 1751 }); 1752 } catch (RemoteException e) { 1753 return false; 1754 } 1755 return res == ActivityManager.USER_OP_SUCCESS; 1756 } finally { 1757 Binder.restoreCallingIdentity(ident); 1758 } 1759 } 1760 1761 void finishRemoveUser(final int userHandle) { 1762 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1763 // Let other services shutdown any activity and clean up their state before completely 1764 // wiping the user's system directory and removing from the user list 1765 long ident = Binder.clearCallingIdentity(); 1766 try { 1767 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1768 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1769 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1770 android.Manifest.permission.MANAGE_USERS, 1771 1772 new BroadcastReceiver() { 1773 @Override 1774 public void onReceive(Context context, Intent intent) { 1775 if (DBG) { 1776 Slog.i(LOG_TAG, 1777 "USER_REMOVED broadcast sent, cleaning up user data " 1778 + userHandle); 1779 } 1780 new Thread() { 1781 public void run() { 1782 // Clean up any ActivityManager state 1783 LocalServices.getService(ActivityManagerInternal.class) 1784 .onUserRemoved(userHandle); 1785 synchronized (mInstallLock) { 1786 synchronized (mPackagesLock) { 1787 removeUserStateLILP(userHandle); 1788 } 1789 } 1790 } 1791 }.start(); 1792 } 1793 }, 1794 1795 null, Activity.RESULT_OK, null, null); 1796 } finally { 1797 Binder.restoreCallingIdentity(ident); 1798 } 1799 } 1800 1801 private void removeUserStateLILP(final int userHandle) { 1802 mContext.getSystemService(StorageManager.class).destroyUserKey(userHandle); 1803 // Cleanup package manager settings 1804 mPm.cleanUpUserLILPw(this, userHandle); 1805 1806 // Remove this user from the list 1807 synchronized (mUsersLock) { 1808 mUsers.remove(userHandle); 1809 } 1810 // Remove user file 1811 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1812 userFile.delete(); 1813 // Update the user list 1814 writeUserListLILP(); 1815 updateUserIds(); 1816 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1817 } 1818 1819 private void removeDirectoryRecursive(File parent) { 1820 if (parent.isDirectory()) { 1821 String[] files = parent.list(); 1822 for (String filename : files) { 1823 File child = new File(parent, filename); 1824 removeDirectoryRecursive(child); 1825 } 1826 } 1827 parent.delete(); 1828 } 1829 1830 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1831 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1832 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1833 Intent.FLAG_RECEIVER_FOREGROUND); 1834 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1835 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1836 } 1837 1838 @Override 1839 public Bundle getApplicationRestrictions(String packageName) { 1840 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1841 } 1842 1843 @Override 1844 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1845 if (UserHandle.getCallingUserId() != userId 1846 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1847 checkManageUsersPermission("get application restrictions for other users/apps"); 1848 } 1849 synchronized (mPackagesLock) { 1850 // Read the restrictions from XML 1851 return readApplicationRestrictionsLP(packageName, userId); 1852 } 1853 } 1854 1855 @Override 1856 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1857 int userId) { 1858 checkManageUsersPermission("set application restrictions"); 1859 synchronized (mPackagesLock) { 1860 if (restrictions == null || restrictions.isEmpty()) { 1861 cleanAppRestrictionsForPackage(packageName, userId); 1862 } else { 1863 // Write the restrictions to XML 1864 writeApplicationRestrictionsLP(packageName, restrictions, userId); 1865 } 1866 } 1867 1868 if (isPackageInstalled(packageName, userId)) { 1869 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1870 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1871 changeIntent.setPackage(packageName); 1872 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1873 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1874 } 1875 } 1876 1877 private void unhideAllInstalledAppsForUser(final int userHandle) { 1878 mHandler.post(new Runnable() { 1879 @Override 1880 public void run() { 1881 List<ApplicationInfo> apps = 1882 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1883 userHandle).getList(); 1884 final long ident = Binder.clearCallingIdentity(); 1885 try { 1886 for (ApplicationInfo appInfo : apps) { 1887 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1888 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1889 != 0) { 1890 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1891 userHandle); 1892 } 1893 } 1894 } finally { 1895 Binder.restoreCallingIdentity(ident); 1896 } 1897 } 1898 }); 1899 } 1900 private int getUidForPackage(String packageName) { 1901 long ident = Binder.clearCallingIdentity(); 1902 try { 1903 return mContext.getPackageManager().getApplicationInfo(packageName, 1904 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1905 } catch (NameNotFoundException nnfe) { 1906 return -1; 1907 } finally { 1908 Binder.restoreCallingIdentity(ident); 1909 } 1910 } 1911 1912 private Bundle readApplicationRestrictionsLP(String packageName, int userId) { 1913 AtomicFile restrictionsFile = 1914 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1915 packageToRestrictionsFileName(packageName))); 1916 return readApplicationRestrictionsLP(restrictionsFile); 1917 } 1918 1919 @VisibleForTesting 1920 static Bundle readApplicationRestrictionsLP(AtomicFile restrictionsFile) { 1921 final Bundle restrictions = new Bundle(); 1922 final ArrayList<String> values = new ArrayList<>(); 1923 if (!restrictionsFile.getBaseFile().exists()) { 1924 return restrictions; 1925 } 1926 1927 FileInputStream fis = null; 1928 try { 1929 fis = restrictionsFile.openRead(); 1930 XmlPullParser parser = Xml.newPullParser(); 1931 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1932 XmlUtils.nextElement(parser); 1933 if (parser.getEventType() != XmlPullParser.START_TAG) { 1934 Slog.e(LOG_TAG, "Unable to read restrictions file " 1935 + restrictionsFile.getBaseFile()); 1936 return restrictions; 1937 } 1938 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1939 readEntry(restrictions, values, parser); 1940 } 1941 } catch (IOException|XmlPullParserException e) { 1942 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1943 } finally { 1944 IoUtils.closeQuietly(fis); 1945 } 1946 return restrictions; 1947 } 1948 1949 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1950 XmlPullParser parser) throws XmlPullParserException, IOException { 1951 int type = parser.getEventType(); 1952 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1953 String key = parser.getAttributeValue(null, ATTR_KEY); 1954 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1955 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1956 if (multiple != null) { 1957 values.clear(); 1958 int count = Integer.parseInt(multiple); 1959 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1960 if (type == XmlPullParser.START_TAG 1961 && parser.getName().equals(TAG_VALUE)) { 1962 values.add(parser.nextText().trim()); 1963 count--; 1964 } 1965 } 1966 String [] valueStrings = new String[values.size()]; 1967 values.toArray(valueStrings); 1968 restrictions.putStringArray(key, valueStrings); 1969 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1970 restrictions.putBundle(key, readBundleEntry(parser, values)); 1971 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1972 final int outerDepth = parser.getDepth(); 1973 ArrayList<Bundle> bundleList = new ArrayList<>(); 1974 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1975 Bundle childBundle = readBundleEntry(parser, values); 1976 bundleList.add(childBundle); 1977 } 1978 restrictions.putParcelableArray(key, 1979 bundleList.toArray(new Bundle[bundleList.size()])); 1980 } else { 1981 String value = parser.nextText().trim(); 1982 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1983 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1984 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1985 restrictions.putInt(key, Integer.parseInt(value)); 1986 } else { 1987 restrictions.putString(key, value); 1988 } 1989 } 1990 } 1991 } 1992 1993 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1994 throws IOException, XmlPullParserException { 1995 Bundle childBundle = new Bundle(); 1996 final int outerDepth = parser.getDepth(); 1997 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1998 readEntry(childBundle, values, parser); 1999 } 2000 return childBundle; 2001 } 2002 2003 private void writeApplicationRestrictionsLP(String packageName, 2004 Bundle restrictions, int userId) { 2005 AtomicFile restrictionsFile = new AtomicFile( 2006 new File(Environment.getUserSystemDirectory(userId), 2007 packageToRestrictionsFileName(packageName))); 2008 writeApplicationRestrictionsLP(restrictions, restrictionsFile); 2009 } 2010 2011 @VisibleForTesting 2012 static void writeApplicationRestrictionsLP(Bundle restrictions, AtomicFile restrictionsFile) { 2013 FileOutputStream fos = null; 2014 try { 2015 fos = restrictionsFile.startWrite(); 2016 final BufferedOutputStream bos = new BufferedOutputStream(fos); 2017 2018 final XmlSerializer serializer = new FastXmlSerializer(); 2019 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 2020 serializer.startDocument(null, true); 2021 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 2022 2023 serializer.startTag(null, TAG_RESTRICTIONS); 2024 writeBundle(restrictions, serializer); 2025 serializer.endTag(null, TAG_RESTRICTIONS); 2026 2027 serializer.endDocument(); 2028 restrictionsFile.finishWrite(fos); 2029 } catch (Exception e) { 2030 restrictionsFile.failWrite(fos); 2031 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 2032 } 2033 } 2034 2035 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 2036 throws IOException { 2037 for (String key : restrictions.keySet()) { 2038 Object value = restrictions.get(key); 2039 serializer.startTag(null, TAG_ENTRY); 2040 serializer.attribute(null, ATTR_KEY, key); 2041 2042 if (value instanceof Boolean) { 2043 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 2044 serializer.text(value.toString()); 2045 } else if (value instanceof Integer) { 2046 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 2047 serializer.text(value.toString()); 2048 } else if (value == null || value instanceof String) { 2049 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 2050 serializer.text(value != null ? (String) value : ""); 2051 } else if (value instanceof Bundle) { 2052 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 2053 writeBundle((Bundle) value, serializer); 2054 } else if (value instanceof Parcelable[]) { 2055 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 2056 Parcelable[] array = (Parcelable[]) value; 2057 for (Parcelable parcelable : array) { 2058 if (!(parcelable instanceof Bundle)) { 2059 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 2060 } 2061 serializer.startTag(null, TAG_ENTRY); 2062 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 2063 writeBundle((Bundle) parcelable, serializer); 2064 serializer.endTag(null, TAG_ENTRY); 2065 } 2066 } else { 2067 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 2068 String[] values = (String[]) value; 2069 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 2070 for (String choice : values) { 2071 serializer.startTag(null, TAG_VALUE); 2072 serializer.text(choice != null ? choice : ""); 2073 serializer.endTag(null, TAG_VALUE); 2074 } 2075 } 2076 serializer.endTag(null, TAG_ENTRY); 2077 } 2078 } 2079 2080 @Override 2081 public int getUserSerialNumber(int userHandle) { 2082 synchronized (mUsersLock) { 2083 if (!exists(userHandle)) return -1; 2084 return getUserInfoLU(userHandle).serialNumber; 2085 } 2086 } 2087 2088 @Override 2089 public int getUserHandle(int userSerialNumber) { 2090 synchronized (mUsersLock) { 2091 for (int userId : mUserIds) { 2092 UserInfo info = getUserInfoLU(userId); 2093 if (info != null && info.serialNumber == userSerialNumber) return userId; 2094 } 2095 // Not found 2096 return -1; 2097 } 2098 } 2099 2100 @Override 2101 public long getUserCreationTime(int userHandle) { 2102 int callingUserId = UserHandle.getCallingUserId(); 2103 UserInfo userInfo = null; 2104 synchronized (mUsersLock) { 2105 if (callingUserId == userHandle) { 2106 userInfo = getUserInfoLU(userHandle); 2107 } else { 2108 UserInfo parent = getProfileParentLU(userHandle); 2109 if (parent != null && parent.id == callingUserId) { 2110 userInfo = getUserInfoLU(userHandle); 2111 } 2112 } 2113 } 2114 if (userInfo == null) { 2115 throw new SecurityException("userHandle can only be the calling user or a managed " 2116 + "profile associated with this user"); 2117 } 2118 return userInfo.creationTime; 2119 } 2120 2121 /** 2122 * Caches the list of user ids in an array, adjusting the array size when necessary. 2123 */ 2124 private void updateUserIds() { 2125 int num = 0; 2126 synchronized (mUsersLock) { 2127 final int userSize = mUsers.size(); 2128 for (int i = 0; i < userSize; i++) { 2129 if (!mUsers.valueAt(i).partial) { 2130 num++; 2131 } 2132 } 2133 final int[] newUsers = new int[num]; 2134 int n = 0; 2135 for (int i = 0; i < userSize; i++) { 2136 if (!mUsers.valueAt(i).partial) { 2137 newUsers[n++] = mUsers.keyAt(i); 2138 } 2139 } 2140 mUserIds = newUsers; 2141 } 2142 } 2143 2144 /** 2145 * Make a note of the last started time of a user and do some cleanup. 2146 * @param userId the user that was just foregrounded 2147 */ 2148 public void onUserForeground(int userId) { 2149 synchronized (mPackagesLock) { 2150 UserInfo user = getUserInfoNoChecks(userId); 2151 long now = System.currentTimeMillis(); 2152 if (user == null || user.partial) { 2153 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 2154 return; 2155 } 2156 if (now > EPOCH_PLUS_30_YEARS) { 2157 user.lastLoggedInTime = now; 2158 scheduleWriteUser(user); 2159 } 2160 } 2161 } 2162 2163 /** 2164 * Returns the next available user id, filling in any holes in the ids. 2165 * TODO: May not be a good idea to recycle ids, in case it results in confusion 2166 * for data and battery stats collection, or unexpected cross-talk. 2167 * @return 2168 */ 2169 private int getNextAvailableId() { 2170 synchronized (mUsersLock) { 2171 int i = MIN_USER_ID; 2172 while (i < MAX_USER_ID) { 2173 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 2174 return i; 2175 } 2176 i++; 2177 } 2178 } 2179 throw new IllegalStateException("No user id available!"); 2180 } 2181 2182 private String packageToRestrictionsFileName(String packageName) { 2183 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 2184 } 2185 2186 /** 2187 * Enforce that serial number stored in user directory inode matches the 2188 * given expected value. Gracefully sets the serial number if currently 2189 * undefined. 2190 * 2191 * @throws IOException when problem extracting serial number, or serial 2192 * number is mismatched. 2193 */ 2194 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 2195 final int foundSerial = getSerialNumber(file); 2196 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 2197 2198 if (foundSerial == -1) { 2199 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 2200 try { 2201 setSerialNumber(file, serialNumber); 2202 } catch (IOException e) { 2203 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 2204 } 2205 2206 } else if (foundSerial != serialNumber) { 2207 throw new IOException("Found serial number " + foundSerial 2208 + " doesn't match expected " + serialNumber); 2209 } 2210 } 2211 2212 /** 2213 * Set serial number stored in user directory inode. 2214 * 2215 * @throws IOException if serial number was already set 2216 */ 2217 private static void setSerialNumber(File file, int serialNumber) 2218 throws IOException { 2219 try { 2220 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 2221 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 2222 } catch (ErrnoException e) { 2223 throw e.rethrowAsIOException(); 2224 } 2225 } 2226 2227 /** 2228 * Return serial number stored in user directory inode. 2229 * 2230 * @return parsed serial number, or -1 if not set 2231 */ 2232 private static int getSerialNumber(File file) throws IOException { 2233 try { 2234 final byte[] buf = new byte[256]; 2235 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 2236 final String serial = new String(buf, 0, len); 2237 try { 2238 return Integer.parseInt(serial); 2239 } catch (NumberFormatException e) { 2240 throw new IOException("Bad serial number: " + serial); 2241 } 2242 } catch (ErrnoException e) { 2243 if (e.errno == OsConstants.ENODATA) { 2244 return -1; 2245 } else { 2246 throw e.rethrowAsIOException(); 2247 } 2248 } 2249 } 2250 2251 @Override 2252 public void onShellCommand(FileDescriptor in, FileDescriptor out, 2253 FileDescriptor err, String[] args, ResultReceiver resultReceiver) { 2254 (new Shell()).exec(this, in, out, err, args, resultReceiver); 2255 } 2256 2257 int onShellCommand(Shell shell, String cmd) { 2258 if (cmd == null) { 2259 return shell.handleDefaultCommands(cmd); 2260 } 2261 2262 final PrintWriter pw = shell.getOutPrintWriter(); 2263 try { 2264 switch(cmd) { 2265 case "list": 2266 return runList(pw); 2267 } 2268 } catch (RemoteException e) { 2269 pw.println("Remote exception: " + e); 2270 } 2271 return -1; 2272 } 2273 2274 private int runList(PrintWriter pw) throws RemoteException { 2275 final IActivityManager am = ActivityManagerNative.getDefault(); 2276 final List<UserInfo> users = getUsers(false); 2277 if (users == null) { 2278 pw.println("Error: couldn't get users"); 2279 return 1; 2280 } else { 2281 pw.println("Users:"); 2282 for (int i = 0; i < users.size(); i++) { 2283 String running = am.isUserRunning(users.get(i).id, 0) ? " running" : ""; 2284 pw.println("\t" + users.get(i).toString() + running); 2285 } 2286 return 0; 2287 } 2288 } 2289 2290 @Override 2291 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2292 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 2293 != PackageManager.PERMISSION_GRANTED) { 2294 pw.println("Permission Denial: can't dump UserManager from from pid=" 2295 + Binder.getCallingPid() 2296 + ", uid=" + Binder.getCallingUid() 2297 + " without permission " 2298 + android.Manifest.permission.DUMP); 2299 return; 2300 } 2301 2302 long now = System.currentTimeMillis(); 2303 StringBuilder sb = new StringBuilder(); 2304 synchronized (mPackagesLock) { 2305 synchronized (mUsersLock) { 2306 pw.println("Users:"); 2307 for (int i = 0; i < mUsers.size(); i++) { 2308 UserInfo user = mUsers.valueAt(i); 2309 if (user == null) { 2310 continue; 2311 } 2312 pw.print(" "); pw.print(user); 2313 pw.print(" serialNo="); pw.print(user.serialNumber); 2314 if (mRemovingUserIds.get(mUsers.keyAt(i))) { 2315 pw.print(" <removing> "); 2316 } 2317 if (user.partial) { 2318 pw.print(" <partial>"); 2319 } 2320 pw.println(); 2321 pw.print(" Created: "); 2322 if (user.creationTime == 0) { 2323 pw.println("<unknown>"); 2324 } else { 2325 sb.setLength(0); 2326 TimeUtils.formatDuration(now - user.creationTime, sb); 2327 sb.append(" ago"); 2328 pw.println(sb); 2329 } 2330 pw.print(" Last logged in: "); 2331 if (user.lastLoggedInTime == 0) { 2332 pw.println("<unknown>"); 2333 } else { 2334 sb.setLength(0); 2335 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2336 sb.append(" ago"); 2337 pw.println(sb); 2338 } 2339 pw.println(" Restrictions:"); 2340 synchronized (mRestrictionsLock) { 2341 UserRestrictionsUtils.dumpRestrictions( 2342 pw, " ", mBaseUserRestrictions.get(user.id)); 2343 pw.println(" Effective restrictions:"); 2344 UserRestrictionsUtils.dumpRestrictions( 2345 pw, " ", mCachedEffectiveUserRestrictions.get(user.id)); 2346 } 2347 } 2348 } 2349 pw.println(); 2350 pw.println("Guest restrictions:"); 2351 UserRestrictionsUtils.dumpRestrictions(pw, " ", mGuestRestrictions); 2352 } 2353 } 2354 2355 final class MainHandler extends Handler { 2356 2357 @Override 2358 public void handleMessage(Message msg) { 2359 switch (msg.what) { 2360 case WRITE_USER_MSG: 2361 removeMessages(WRITE_USER_MSG, msg.obj); 2362 synchronized (mPackagesLock) { 2363 int userId = ((UserInfo) msg.obj).id; 2364 UserInfo userInfo = getUserInfoNoChecks(userId); 2365 if (userInfo != null) { 2366 writeUserLP(userInfo); 2367 } 2368 } 2369 } 2370 } 2371 } 2372 2373 /** 2374 * @param userId 2375 * @return whether the user has been initialized yet 2376 */ 2377 boolean isInitialized(int userId) { 2378 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2379 } 2380 2381 private class LocalService extends UserManagerInternal { 2382 2383 @Override 2384 public Object getUserRestrictionsLock() { 2385 return mRestrictionsLock; 2386 } 2387 2388 @Override 2389 @GuardedBy("mRestrictionsLock") 2390 public void updateEffectiveUserRestrictionsLR(int userId) { 2391 UserManagerService.this.updateEffectiveUserRestrictionsLR(userId); 2392 } 2393 2394 @Override 2395 @GuardedBy("mRestrictionsLock") 2396 public void updateEffectiveUserRestrictionsForAllUsersLR() { 2397 UserManagerService.this.updateEffectiveUserRestrictionsForAllUsersLR(); 2398 } 2399 2400 @Override 2401 public Bundle getBaseUserRestrictions(int userId) { 2402 synchronized (mRestrictionsLock) { 2403 return mBaseUserRestrictions.get(userId); 2404 } 2405 } 2406 2407 @Override 2408 public void setBaseUserRestrictionsByDpmsForMigration( 2409 int userId, Bundle baseRestrictions) { 2410 synchronized (mRestrictionsLock) { 2411 mBaseUserRestrictions.put(userId, new Bundle(baseRestrictions)); 2412 invalidateEffectiveUserRestrictionsLR(userId); 2413 } 2414 2415 final UserInfo userInfo = getUserInfoNoChecks(userId); 2416 synchronized (mPackagesLock) { 2417 if (userInfo != null) { 2418 writeUserLP(userInfo); 2419 } else { 2420 Slog.w(LOG_TAG, "UserInfo not found for " + userId); 2421 } 2422 } 2423 } 2424 2425 @Override 2426 public boolean getUserRestriction(int userId, String key) { 2427 return getUserRestrictions(userId).getBoolean(key); 2428 } 2429 2430 @Override 2431 public void addUserRestrictionsListener(UserRestrictionsListener listener) { 2432 synchronized (mUserRestrictionsListeners) { 2433 mUserRestrictionsListeners.add(listener); 2434 } 2435 } 2436 2437 @Override 2438 public void removeUserRestrictionsListener(UserRestrictionsListener listener) { 2439 synchronized (mUserRestrictionsListeners) { 2440 mUserRestrictionsListeners.remove(listener); 2441 } 2442 } 2443 } 2444 2445 private class Shell extends ShellCommand { 2446 @Override 2447 public int onCommand(String cmd) { 2448 return onShellCommand(this, cmd); 2449 } 2450 2451 @Override 2452 public void onHelp() { 2453 final PrintWriter pw = getOutPrintWriter(); 2454 pw.println("User manager (user) commands:"); 2455 pw.println(" help"); 2456 pw.println(" Print this help text."); 2457 pw.println(""); 2458 pw.println(" list"); 2459 pw.println(" Prints all users on the system."); 2460 } 2461 } 2462} 2463