UserManagerService.java revision 5d7e9516861b8248f728641d7ae7a54b82a1255d
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) { 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 int managedProfilesCount = getProfiles(userId, true).size() - 1; 904 if (managedProfilesCount >= MAX_MANAGED_PROFILES) { 905 return false; 906 } 907 synchronized(mUsersLock) { 908 UserInfo userInfo = getUserInfoLU(userId); 909 if (!userInfo.canHaveProfile()) { 910 return false; 911 } 912 int usersCount = getAliveUsersExcludingGuestsCountLU(); 913 // We allow creating a managed profile in the special case where there is only one user. 914 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 915 } 916 } 917 918 private int getAliveUsersExcludingGuestsCountLU() { 919 int aliveUserCount = 0; 920 final int totalUserCount = mUsers.size(); 921 // Skip over users being removed 922 for (int i = 0; i < totalUserCount; i++) { 923 UserInfo user = mUsers.valueAt(i); 924 if (!mRemovingUserIds.get(user.id) 925 && !user.isGuest() && !user.partial) { 926 aliveUserCount++; 927 } 928 } 929 return aliveUserCount; 930 } 931 932 /** 933 * Enforces that only the system UID or root's UID or apps that have the 934 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 935 * permission can make certain calls to the UserManager. 936 * 937 * @param message used as message if SecurityException is thrown 938 * @throws SecurityException if the caller is not system or root 939 */ 940 private static final void checkManageUsersPermission(String message) { 941 final int uid = Binder.getCallingUid(); 942 if (uid != Process.SYSTEM_UID && uid != 0 943 && ActivityManager.checkComponentPermission( 944 android.Manifest.permission.MANAGE_USERS, 945 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 946 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 947 } 948 } 949 950 private static void checkSystemOrRoot(String message) { 951 final int uid = Binder.getCallingUid(); 952 if (uid != Process.SYSTEM_UID && uid != 0) { 953 throw new SecurityException("Only system may call: " + message); 954 } 955 } 956 957 private void writeBitmapLP(UserInfo info, Bitmap bitmap) { 958 try { 959 File dir = new File(mUsersDir, Integer.toString(info.id)); 960 File file = new File(dir, USER_PHOTO_FILENAME); 961 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 962 if (!dir.exists()) { 963 dir.mkdir(); 964 FileUtils.setPermissions( 965 dir.getPath(), 966 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 967 -1, -1); 968 } 969 FileOutputStream os; 970 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 971 && tmp.renameTo(file)) { 972 info.iconPath = file.getAbsolutePath(); 973 } 974 try { 975 os.close(); 976 } catch (IOException ioe) { 977 // What the ... ! 978 } 979 tmp.delete(); 980 } catch (FileNotFoundException e) { 981 Slog.w(LOG_TAG, "Error setting photo for user ", e); 982 } 983 } 984 985 /** 986 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 987 * cache it elsewhere. 988 * @return the array of user ids. 989 */ 990 public int[] getUserIds() { 991 synchronized (mUsersLock) { 992 return mUserIds; 993 } 994 } 995 996 private void readUserListLILP() { 997 if (!mUserListFile.exists()) { 998 fallbackToSingleUserLILP(); 999 return; 1000 } 1001 FileInputStream fis = null; 1002 AtomicFile userListFile = new AtomicFile(mUserListFile); 1003 try { 1004 fis = userListFile.openRead(); 1005 XmlPullParser parser = Xml.newPullParser(); 1006 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1007 int type; 1008 while ((type = parser.next()) != XmlPullParser.START_TAG 1009 && type != XmlPullParser.END_DOCUMENT) { 1010 ; 1011 } 1012 1013 if (type != XmlPullParser.START_TAG) { 1014 Slog.e(LOG_TAG, "Unable to read user list"); 1015 fallbackToSingleUserLILP(); 1016 return; 1017 } 1018 1019 mNextSerialNumber = -1; 1020 if (parser.getName().equals(TAG_USERS)) { 1021 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 1022 if (lastSerialNumber != null) { 1023 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 1024 } 1025 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 1026 if (versionNumber != null) { 1027 mUserVersion = Integer.parseInt(versionNumber); 1028 } 1029 } 1030 1031 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1032 if (type == XmlPullParser.START_TAG) { 1033 final String name = parser.getName(); 1034 if (name.equals(TAG_USER)) { 1035 String id = parser.getAttributeValue(null, ATTR_ID); 1036 UserInfo user = readUserLILP(Integer.parseInt(id)); 1037 1038 if (user != null) { 1039 synchronized (mUsersLock) { 1040 mUsers.put(user.id, user); 1041 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 1042 mNextSerialNumber = user.id + 1; 1043 } 1044 } 1045 } 1046 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 1047 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1048 && type != XmlPullParser.END_TAG) { 1049 if (type == XmlPullParser.START_TAG) { 1050 if (parser.getName().equals(TAG_RESTRICTIONS)) { 1051 UserRestrictionsUtils 1052 .readRestrictions(parser, mGuestRestrictions); 1053 } 1054 break; 1055 } 1056 } 1057 } 1058 } 1059 } 1060 updateUserIds(); 1061 upgradeIfNecessaryLILP(); 1062 } catch (IOException ioe) { 1063 fallbackToSingleUserLILP(); 1064 } catch (XmlPullParserException pe) { 1065 fallbackToSingleUserLILP(); 1066 } finally { 1067 if (fis != null) { 1068 try { 1069 fis.close(); 1070 } catch (IOException e) { 1071 } 1072 } 1073 } 1074 } 1075 1076 /** 1077 * Upgrade steps between versions, either for fixing bugs or changing the data format. 1078 */ 1079 private void upgradeIfNecessaryLILP() { 1080 int userVersion = mUserVersion; 1081 if (userVersion < 1) { 1082 // Assign a proper name for the owner, if not initialized correctly before 1083 UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM); 1084 if ("Primary".equals(user.name)) { 1085 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 1086 scheduleWriteUser(user); 1087 } 1088 userVersion = 1; 1089 } 1090 1091 if (userVersion < 2) { 1092 // Owner should be marked as initialized 1093 UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM); 1094 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 1095 user.flags |= UserInfo.FLAG_INITIALIZED; 1096 scheduleWriteUser(user); 1097 } 1098 userVersion = 2; 1099 } 1100 1101 1102 if (userVersion < 4) { 1103 userVersion = 4; 1104 } 1105 1106 if (userVersion < 5) { 1107 initDefaultGuestRestrictions(); 1108 userVersion = 5; 1109 } 1110 1111 if (userVersion < 6) { 1112 final boolean splitSystemUser = UserManager.isSplitSystemUser(); 1113 synchronized (mUsersLock) { 1114 for (int i = 0; i < mUsers.size(); i++) { 1115 UserInfo user = mUsers.valueAt(i); 1116 // In non-split mode, only user 0 can have restricted profiles 1117 if (!splitSystemUser && user.isRestricted() 1118 && (user.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID)) { 1119 user.restrictedProfileParentId = UserHandle.USER_SYSTEM; 1120 scheduleWriteUser(user); 1121 } 1122 } 1123 } 1124 userVersion = 6; 1125 } 1126 1127 if (userVersion < USER_VERSION) { 1128 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 1129 + USER_VERSION); 1130 } else { 1131 mUserVersion = userVersion; 1132 writeUserListLILP(); 1133 } 1134 } 1135 1136 private void fallbackToSingleUserLILP() { 1137 int flags = UserInfo.FLAG_INITIALIZED; 1138 // In split system user mode, the admin and primary flags are assigned to the first human 1139 // user. 1140 if (!UserManager.isSplitSystemUser()) { 1141 flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY; 1142 } 1143 // Create the system user 1144 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 1145 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 1146 flags); 1147 synchronized (mUsersLock) { 1148 mUsers.put(system.id, system); 1149 } 1150 mNextSerialNumber = MIN_USER_ID; 1151 mUserVersion = USER_VERSION; 1152 1153 Bundle restrictions = new Bundle(); 1154 synchronized (mRestrictionsLock) { 1155 mBaseUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 1156 } 1157 1158 updateUserIds(); 1159 initDefaultGuestRestrictions(); 1160 1161 writeUserListLILP(); 1162 writeUserLP(system); 1163 } 1164 1165 private void scheduleWriteUser(UserInfo userInfo) { 1166 // No need to wrap it within a lock -- worst case, we'll just post the same message 1167 // twice. 1168 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 1169 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 1170 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 1171 } 1172 } 1173 1174 /* 1175 * Writes the user file in this format: 1176 * 1177 * <user flags="20039023" id="0"> 1178 * <name>Primary</name> 1179 * </user> 1180 */ 1181 private void writeUserLP(UserInfo userInfo) { 1182 FileOutputStream fos = null; 1183 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 1184 try { 1185 fos = userFile.startWrite(); 1186 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1187 1188 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1189 final XmlSerializer serializer = new FastXmlSerializer(); 1190 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1191 serializer.startDocument(null, true); 1192 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1193 1194 serializer.startTag(null, TAG_USER); 1195 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 1196 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 1197 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 1198 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 1199 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 1200 Long.toString(userInfo.lastLoggedInTime)); 1201 if (userInfo.iconPath != null) { 1202 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 1203 } 1204 if (userInfo.partial) { 1205 serializer.attribute(null, ATTR_PARTIAL, "true"); 1206 } 1207 if (userInfo.guestToRemove) { 1208 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 1209 } 1210 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 1211 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 1212 Integer.toString(userInfo.profileGroupId)); 1213 } 1214 if (userInfo.restrictedProfileParentId != UserInfo.NO_PROFILE_GROUP_ID) { 1215 serializer.attribute(null, ATTR_RESTRICTED_PROFILE_PARENT_ID, 1216 Integer.toString(userInfo.restrictedProfileParentId)); 1217 } 1218 serializer.startTag(null, TAG_NAME); 1219 serializer.text(userInfo.name); 1220 serializer.endTag(null, TAG_NAME); 1221 Bundle restrictions; 1222 synchronized (mRestrictionsLock) { 1223 restrictions = mBaseUserRestrictions.get(userInfo.id); 1224 } 1225 if (restrictions != null) { 1226 UserRestrictionsUtils 1227 .writeRestrictions(serializer, restrictions, TAG_RESTRICTIONS); 1228 } 1229 serializer.endTag(null, TAG_USER); 1230 1231 serializer.endDocument(); 1232 userFile.finishWrite(fos); 1233 } catch (Exception ioe) { 1234 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 1235 userFile.failWrite(fos); 1236 } 1237 } 1238 1239 /* 1240 * Writes the user list file in this format: 1241 * 1242 * <users nextSerialNumber="3"> 1243 * <user id="0"></user> 1244 * <user id="2"></user> 1245 * </users> 1246 */ 1247 private void writeUserListLILP() { 1248 // TODO Investigate removing a dependency on mInstallLock 1249 FileOutputStream fos = null; 1250 AtomicFile userListFile = new AtomicFile(mUserListFile); 1251 try { 1252 fos = userListFile.startWrite(); 1253 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1254 1255 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1256 final XmlSerializer serializer = new FastXmlSerializer(); 1257 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1258 serializer.startDocument(null, true); 1259 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1260 1261 serializer.startTag(null, TAG_USERS); 1262 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 1263 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 1264 1265 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 1266 UserRestrictionsUtils 1267 .writeRestrictions(serializer, mGuestRestrictions, TAG_RESTRICTIONS); 1268 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 1269 int[] userIdsToWrite; 1270 synchronized (mUsersLock) { 1271 userIdsToWrite = new int[mUsers.size()]; 1272 for (int i = 0; i < userIdsToWrite.length; i++) { 1273 UserInfo user = mUsers.valueAt(i); 1274 userIdsToWrite[i] = user.id; 1275 } 1276 } 1277 for (int id : userIdsToWrite) { 1278 serializer.startTag(null, TAG_USER); 1279 serializer.attribute(null, ATTR_ID, Integer.toString(id)); 1280 serializer.endTag(null, TAG_USER); 1281 } 1282 1283 serializer.endTag(null, TAG_USERS); 1284 1285 serializer.endDocument(); 1286 userListFile.finishWrite(fos); 1287 } catch (Exception e) { 1288 userListFile.failWrite(fos); 1289 Slog.e(LOG_TAG, "Error writing user list"); 1290 } 1291 } 1292 1293 private UserInfo readUserLILP(int id) { 1294 int flags = 0; 1295 int serialNumber = id; 1296 String name = null; 1297 String iconPath = null; 1298 long creationTime = 0L; 1299 long lastLoggedInTime = 0L; 1300 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1301 int restrictedProfileParentId = UserInfo.NO_PROFILE_GROUP_ID; 1302 boolean partial = false; 1303 boolean guestToRemove = false; 1304 Bundle restrictions = new Bundle(); 1305 1306 FileInputStream fis = null; 1307 try { 1308 AtomicFile userFile = 1309 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1310 fis = userFile.openRead(); 1311 XmlPullParser parser = Xml.newPullParser(); 1312 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1313 int type; 1314 while ((type = parser.next()) != XmlPullParser.START_TAG 1315 && type != XmlPullParser.END_DOCUMENT) { 1316 ; 1317 } 1318 1319 if (type != XmlPullParser.START_TAG) { 1320 Slog.e(LOG_TAG, "Unable to read user " + id); 1321 return null; 1322 } 1323 1324 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1325 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1326 if (storedId != id) { 1327 Slog.e(LOG_TAG, "User id does not match the file name"); 1328 return null; 1329 } 1330 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1331 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1332 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1333 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1334 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1335 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1336 UserInfo.NO_PROFILE_GROUP_ID); 1337 restrictedProfileParentId = readIntAttribute(parser, 1338 ATTR_RESTRICTED_PROFILE_PARENT_ID, UserInfo.NO_PROFILE_GROUP_ID); 1339 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1340 if ("true".equals(valueString)) { 1341 partial = true; 1342 } 1343 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1344 if ("true".equals(valueString)) { 1345 guestToRemove = true; 1346 } 1347 1348 int outerDepth = parser.getDepth(); 1349 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1350 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1351 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1352 continue; 1353 } 1354 String tag = parser.getName(); 1355 if (TAG_NAME.equals(tag)) { 1356 type = parser.next(); 1357 if (type == XmlPullParser.TEXT) { 1358 name = parser.getText(); 1359 } 1360 } else if (TAG_RESTRICTIONS.equals(tag)) { 1361 UserRestrictionsUtils.readRestrictions(parser, restrictions); 1362 } 1363 } 1364 } 1365 1366 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1367 userInfo.serialNumber = serialNumber; 1368 userInfo.creationTime = creationTime; 1369 userInfo.lastLoggedInTime = lastLoggedInTime; 1370 userInfo.partial = partial; 1371 userInfo.guestToRemove = guestToRemove; 1372 userInfo.profileGroupId = profileGroupId; 1373 userInfo.restrictedProfileParentId = restrictedProfileParentId; 1374 synchronized (mRestrictionsLock) { 1375 mBaseUserRestrictions.append(id, restrictions); 1376 } 1377 return userInfo; 1378 1379 } catch (IOException ioe) { 1380 } catch (XmlPullParserException pe) { 1381 } finally { 1382 if (fis != null) { 1383 try { 1384 fis.close(); 1385 } catch (IOException e) { 1386 } 1387 } 1388 } 1389 return null; 1390 } 1391 1392 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1393 String valueString = parser.getAttributeValue(null, attr); 1394 if (valueString == null) return defaultValue; 1395 try { 1396 return Integer.parseInt(valueString); 1397 } catch (NumberFormatException nfe) { 1398 return defaultValue; 1399 } 1400 } 1401 1402 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1403 String valueString = parser.getAttributeValue(null, attr); 1404 if (valueString == null) return defaultValue; 1405 try { 1406 return Long.parseLong(valueString); 1407 } catch (NumberFormatException nfe) { 1408 return defaultValue; 1409 } 1410 } 1411 1412 private boolean isPackageInstalled(String pkg, int userId) { 1413 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1414 PackageManager.GET_UNINSTALLED_PACKAGES, 1415 userId); 1416 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1417 return false; 1418 } 1419 return true; 1420 } 1421 1422 /** 1423 * Removes all the restrictions files (res_<packagename>) for a given user. 1424 * Does not do any permissions checking. 1425 */ 1426 private void cleanAppRestrictions(int userId) { 1427 synchronized (mPackagesLock) { 1428 File dir = Environment.getUserSystemDirectory(userId); 1429 String[] files = dir.list(); 1430 if (files == null) return; 1431 for (String fileName : files) { 1432 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1433 File resFile = new File(dir, fileName); 1434 if (resFile.exists()) { 1435 resFile.delete(); 1436 } 1437 } 1438 } 1439 } 1440 } 1441 1442 /** 1443 * Removes the app restrictions file for a specific package and user id, if it exists. 1444 */ 1445 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1446 synchronized (mPackagesLock) { 1447 File dir = Environment.getUserSystemDirectory(userId); 1448 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1449 if (resFile.exists()) { 1450 resFile.delete(); 1451 } 1452 } 1453 } 1454 1455 @Override 1456 public UserInfo createProfileForUser(String name, int flags, int userId) { 1457 checkManageUsersPermission("Only the system can create users"); 1458 return createUserInternal(name, flags, userId); 1459 } 1460 1461 @Override 1462 public UserInfo createUser(String name, int flags) { 1463 checkManageUsersPermission("Only the system can create users"); 1464 return createUserInternal(name, flags, UserHandle.USER_NULL); 1465 } 1466 1467 private UserInfo createUserInternal(String name, int flags, int parentId) { 1468 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1469 UserManager.DISALLOW_ADD_USER, false)) { 1470 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1471 return null; 1472 } 1473 if (ActivityManager.isLowRamDeviceStatic()) { 1474 return null; 1475 } 1476 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1477 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1478 final boolean isRestricted = (flags & UserInfo.FLAG_RESTRICTED) != 0; 1479 final long ident = Binder.clearCallingIdentity(); 1480 UserInfo userInfo = null; 1481 final int userId; 1482 try { 1483 synchronized (mInstallLock) { 1484 synchronized (mPackagesLock) { 1485 UserInfo parent = null; 1486 if (parentId != UserHandle.USER_NULL) { 1487 synchronized (mUsersLock) { 1488 parent = getUserInfoLU(parentId); 1489 } 1490 if (parent == null) return null; 1491 } 1492 if (isManagedProfile && !canAddMoreManagedProfiles(parentId)) { 1493 Log.e(LOG_TAG, "Cannot add more managed profiles for user " + parentId); 1494 return null; 1495 } 1496 if (!isGuest && !isManagedProfile && isUserLimitReached()) { 1497 // If we're not adding a guest user or a managed profile and the limit has 1498 // been reached, cannot add a user. 1499 return null; 1500 } 1501 // If we're adding a guest and there already exists one, bail. 1502 if (isGuest && findCurrentGuestUser() != null) { 1503 return null; 1504 } 1505 // In legacy mode, restricted profile's parent can only be the owner user 1506 if (isRestricted && !UserManager.isSplitSystemUser() 1507 && (parentId != UserHandle.USER_SYSTEM)) { 1508 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1509 return null; 1510 } 1511 if (isRestricted && UserManager.isSplitSystemUser()) { 1512 if (parent == null) { 1513 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be " 1514 + "specified"); 1515 return null; 1516 } 1517 if (!parent.canHaveProfile()) { 1518 Log.w(LOG_TAG, "Cannot add restricted profile - profiles cannot be " 1519 + "created for the specified parent user id " + parentId); 1520 return null; 1521 } 1522 } 1523 // In split system user mode, we assign the first human user the primary flag. 1524 // And if there is no device owner, we also assign the admin flag to primary 1525 // user. 1526 if (UserManager.isSplitSystemUser() 1527 && !isGuest && !isManagedProfile && getPrimaryUser() == null) { 1528 flags |= UserInfo.FLAG_PRIMARY; 1529 DevicePolicyManager devicePolicyManager = (DevicePolicyManager) 1530 mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); 1531 if (devicePolicyManager == null 1532 || devicePolicyManager.getDeviceOwner() == null) { 1533 flags |= UserInfo.FLAG_ADMIN; 1534 } 1535 } 1536 userId = getNextAvailableId(); 1537 userInfo = new UserInfo(userId, name, null, flags); 1538 userInfo.serialNumber = mNextSerialNumber++; 1539 long now = System.currentTimeMillis(); 1540 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1541 userInfo.partial = true; 1542 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1543 mUsers.put(userId, userInfo); 1544 writeUserListLILP(); 1545 if (parent != null) { 1546 if (isManagedProfile) { 1547 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1548 parent.profileGroupId = parent.id; 1549 scheduleWriteUser(parent); 1550 } 1551 userInfo.profileGroupId = parent.profileGroupId; 1552 } else if (isRestricted) { 1553 if (!parent.canHaveProfile()) { 1554 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1555 } 1556 if (parent.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID) { 1557 parent.restrictedProfileParentId = parent.id; 1558 scheduleWriteUser(parent); 1559 } 1560 userInfo.restrictedProfileParentId = parent.restrictedProfileParentId; 1561 } 1562 } 1563 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1564 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1565 final String volumeUuid = vol.getFsUuid(); 1566 try { 1567 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1568 userId); 1569 prepareUserDirectory(mContext, volumeUuid, userId); 1570 enforceSerialNumber(userDir, userInfo.serialNumber); 1571 } catch (IOException e) { 1572 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1573 } 1574 } 1575 mPm.createNewUserLILPw(userId); 1576 userInfo.partial = false; 1577 scheduleWriteUser(userInfo); 1578 updateUserIds(); 1579 Bundle restrictions = new Bundle(); 1580 synchronized (mRestrictionsLock) { 1581 mBaseUserRestrictions.append(userId, restrictions); 1582 } 1583 } 1584 } 1585 mPm.newUserCreated(userId); 1586 if (userInfo != null) { 1587 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1588 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1589 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1590 android.Manifest.permission.MANAGE_USERS); 1591 } 1592 } finally { 1593 Binder.restoreCallingIdentity(ident); 1594 } 1595 return userInfo; 1596 } 1597 1598 /** 1599 * @hide 1600 */ 1601 public UserInfo createRestrictedProfile(String name, int parentUserId) { 1602 checkManageUsersPermission("setupRestrictedProfile"); 1603 final UserInfo user = createProfileForUser(name, UserInfo.FLAG_RESTRICTED, parentUserId); 1604 if (user == null) { 1605 return null; 1606 } 1607 setUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS, true, user.id); 1608 // Change the setting before applying the DISALLOW_SHARE_LOCATION restriction, otherwise 1609 // the putIntForUser() will fail. 1610 android.provider.Settings.Secure.putIntForUser(mContext.getContentResolver(), 1611 android.provider.Settings.Secure.LOCATION_MODE, 1612 android.provider.Settings.Secure.LOCATION_MODE_OFF, user.id); 1613 setUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, true, user.id); 1614 return user; 1615 } 1616 1617 /** 1618 * Find the current guest user. If the Guest user is partial, 1619 * then do not include it in the results as it is about to die. 1620 */ 1621 private UserInfo findCurrentGuestUser() { 1622 synchronized (mUsersLock) { 1623 final int size = mUsers.size(); 1624 for (int i = 0; i < size; i++) { 1625 final UserInfo user = mUsers.valueAt(i); 1626 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1627 return user; 1628 } 1629 } 1630 } 1631 return null; 1632 } 1633 1634 /** 1635 * Mark this guest user for deletion to allow us to create another guest 1636 * and switch to that user before actually removing this guest. 1637 * @param userHandle the userid of the current guest 1638 * @return whether the user could be marked for deletion 1639 */ 1640 public boolean markGuestForDeletion(int userHandle) { 1641 checkManageUsersPermission("Only the system can remove users"); 1642 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1643 UserManager.DISALLOW_REMOVE_USER, false)) { 1644 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1645 return false; 1646 } 1647 1648 long ident = Binder.clearCallingIdentity(); 1649 try { 1650 final UserInfo user; 1651 synchronized (mPackagesLock) { 1652 synchronized (mUsersLock) { 1653 user = mUsers.get(userHandle); 1654 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1655 return false; 1656 } 1657 } 1658 if (!user.isGuest()) { 1659 return false; 1660 } 1661 // We set this to a guest user that is to be removed. This is a temporary state 1662 // where we are allowed to add new Guest users, even if this one is still not 1663 // removed. This user will still show up in getUserInfo() calls. 1664 // If we don't get around to removing this Guest user, it will be purged on next 1665 // startup. 1666 user.guestToRemove = true; 1667 // Mark it as disabled, so that it isn't returned any more when 1668 // profiles are queried. 1669 user.flags |= UserInfo.FLAG_DISABLED; 1670 writeUserLP(user); 1671 } 1672 } finally { 1673 Binder.restoreCallingIdentity(ident); 1674 } 1675 return true; 1676 } 1677 1678 /** 1679 * Removes a user and all data directories created for that user. This method should be called 1680 * after the user's processes have been terminated. 1681 * @param userHandle the user's id 1682 */ 1683 public boolean removeUser(int userHandle) { 1684 checkManageUsersPermission("Only the system can remove users"); 1685 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1686 UserManager.DISALLOW_REMOVE_USER, false)) { 1687 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1688 return false; 1689 } 1690 1691 long ident = Binder.clearCallingIdentity(); 1692 try { 1693 final UserInfo user; 1694 int currentUser = ActivityManager.getCurrentUser(); 1695 if (currentUser == userHandle) { 1696 Log.w(LOG_TAG, "Current user cannot be removed"); 1697 return false; 1698 } 1699 synchronized (mPackagesLock) { 1700 synchronized (mUsersLock) { 1701 user = mUsers.get(userHandle); 1702 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1703 return false; 1704 } 1705 1706 // We remember deleted user IDs to prevent them from being 1707 // reused during the current boot; they can still be reused 1708 // after a reboot. 1709 mRemovingUserIds.put(userHandle, true); 1710 } 1711 1712 try { 1713 mAppOpsService.removeUser(userHandle); 1714 } catch (RemoteException e) { 1715 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1716 } 1717 // Set this to a partially created user, so that the user will be purged 1718 // on next startup, in case the runtime stops now before stopping and 1719 // removing the user completely. 1720 user.partial = true; 1721 // Mark it as disabled, so that it isn't returned any more when 1722 // profiles are queried. 1723 user.flags |= UserInfo.FLAG_DISABLED; 1724 writeUserLP(user); 1725 } 1726 1727 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1728 && user.isManagedProfile()) { 1729 // Send broadcast to notify system that the user removed was a 1730 // managed user. 1731 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1732 } 1733 1734 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1735 int res; 1736 try { 1737 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1738 new IStopUserCallback.Stub() { 1739 @Override 1740 public void userStopped(int userId) { 1741 finishRemoveUser(userId); 1742 } 1743 @Override 1744 public void userStopAborted(int userId) { 1745 } 1746 }); 1747 } catch (RemoteException e) { 1748 return false; 1749 } 1750 return res == ActivityManager.USER_OP_SUCCESS; 1751 } finally { 1752 Binder.restoreCallingIdentity(ident); 1753 } 1754 } 1755 1756 void finishRemoveUser(final int userHandle) { 1757 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1758 // Let other services shutdown any activity and clean up their state before completely 1759 // wiping the user's system directory and removing from the user list 1760 long ident = Binder.clearCallingIdentity(); 1761 try { 1762 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1763 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1764 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1765 android.Manifest.permission.MANAGE_USERS, 1766 1767 new BroadcastReceiver() { 1768 @Override 1769 public void onReceive(Context context, Intent intent) { 1770 if (DBG) { 1771 Slog.i(LOG_TAG, 1772 "USER_REMOVED broadcast sent, cleaning up user data " 1773 + userHandle); 1774 } 1775 new Thread() { 1776 public void run() { 1777 // Clean up any ActivityManager state 1778 LocalServices.getService(ActivityManagerInternal.class) 1779 .onUserRemoved(userHandle); 1780 synchronized (mInstallLock) { 1781 synchronized (mPackagesLock) { 1782 removeUserStateLILP(userHandle); 1783 } 1784 } 1785 } 1786 }.start(); 1787 } 1788 }, 1789 1790 null, Activity.RESULT_OK, null, null); 1791 } finally { 1792 Binder.restoreCallingIdentity(ident); 1793 } 1794 } 1795 1796 private void removeUserStateLILP(final int userHandle) { 1797 mContext.getSystemService(StorageManager.class) 1798 .deleteUserKey(userHandle); 1799 // Cleanup package manager settings 1800 mPm.cleanUpUserLILPw(this, userHandle); 1801 1802 // Remove this user from the list 1803 synchronized (mUsersLock) { 1804 mUsers.remove(userHandle); 1805 } 1806 // Remove user file 1807 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1808 userFile.delete(); 1809 // Update the user list 1810 writeUserListLILP(); 1811 updateUserIds(); 1812 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1813 } 1814 1815 private void removeDirectoryRecursive(File parent) { 1816 if (parent.isDirectory()) { 1817 String[] files = parent.list(); 1818 for (String filename : files) { 1819 File child = new File(parent, filename); 1820 removeDirectoryRecursive(child); 1821 } 1822 } 1823 parent.delete(); 1824 } 1825 1826 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1827 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1828 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1829 Intent.FLAG_RECEIVER_FOREGROUND); 1830 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1831 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1832 } 1833 1834 @Override 1835 public Bundle getApplicationRestrictions(String packageName) { 1836 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1837 } 1838 1839 @Override 1840 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1841 if (UserHandle.getCallingUserId() != userId 1842 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1843 checkManageUsersPermission("get application restrictions for other users/apps"); 1844 } 1845 synchronized (mPackagesLock) { 1846 // Read the restrictions from XML 1847 return readApplicationRestrictionsLP(packageName, userId); 1848 } 1849 } 1850 1851 @Override 1852 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1853 int userId) { 1854 checkManageUsersPermission("set application restrictions"); 1855 synchronized (mPackagesLock) { 1856 if (restrictions == null || restrictions.isEmpty()) { 1857 cleanAppRestrictionsForPackage(packageName, userId); 1858 } else { 1859 // Write the restrictions to XML 1860 writeApplicationRestrictionsLP(packageName, restrictions, userId); 1861 } 1862 } 1863 1864 if (isPackageInstalled(packageName, userId)) { 1865 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1866 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1867 changeIntent.setPackage(packageName); 1868 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1869 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1870 } 1871 } 1872 1873 private void unhideAllInstalledAppsForUser(final int userHandle) { 1874 mHandler.post(new Runnable() { 1875 @Override 1876 public void run() { 1877 List<ApplicationInfo> apps = 1878 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1879 userHandle).getList(); 1880 final long ident = Binder.clearCallingIdentity(); 1881 try { 1882 for (ApplicationInfo appInfo : apps) { 1883 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1884 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1885 != 0) { 1886 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1887 userHandle); 1888 } 1889 } 1890 } finally { 1891 Binder.restoreCallingIdentity(ident); 1892 } 1893 } 1894 }); 1895 } 1896 private int getUidForPackage(String packageName) { 1897 long ident = Binder.clearCallingIdentity(); 1898 try { 1899 return mContext.getPackageManager().getApplicationInfo(packageName, 1900 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1901 } catch (NameNotFoundException nnfe) { 1902 return -1; 1903 } finally { 1904 Binder.restoreCallingIdentity(ident); 1905 } 1906 } 1907 1908 private Bundle readApplicationRestrictionsLP(String packageName, int userId) { 1909 AtomicFile restrictionsFile = 1910 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1911 packageToRestrictionsFileName(packageName))); 1912 return readApplicationRestrictionsLP(restrictionsFile); 1913 } 1914 1915 @VisibleForTesting 1916 static Bundle readApplicationRestrictionsLP(AtomicFile restrictionsFile) { 1917 final Bundle restrictions = new Bundle(); 1918 final ArrayList<String> values = new ArrayList<>(); 1919 if (!restrictionsFile.getBaseFile().exists()) { 1920 return restrictions; 1921 } 1922 1923 FileInputStream fis = null; 1924 try { 1925 fis = restrictionsFile.openRead(); 1926 XmlPullParser parser = Xml.newPullParser(); 1927 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1928 XmlUtils.nextElement(parser); 1929 if (parser.getEventType() != XmlPullParser.START_TAG) { 1930 Slog.e(LOG_TAG, "Unable to read restrictions file " 1931 + restrictionsFile.getBaseFile()); 1932 return restrictions; 1933 } 1934 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1935 readEntry(restrictions, values, parser); 1936 } 1937 } catch (IOException|XmlPullParserException e) { 1938 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1939 } finally { 1940 IoUtils.closeQuietly(fis); 1941 } 1942 return restrictions; 1943 } 1944 1945 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1946 XmlPullParser parser) throws XmlPullParserException, IOException { 1947 int type = parser.getEventType(); 1948 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1949 String key = parser.getAttributeValue(null, ATTR_KEY); 1950 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1951 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1952 if (multiple != null) { 1953 values.clear(); 1954 int count = Integer.parseInt(multiple); 1955 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1956 if (type == XmlPullParser.START_TAG 1957 && parser.getName().equals(TAG_VALUE)) { 1958 values.add(parser.nextText().trim()); 1959 count--; 1960 } 1961 } 1962 String [] valueStrings = new String[values.size()]; 1963 values.toArray(valueStrings); 1964 restrictions.putStringArray(key, valueStrings); 1965 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1966 restrictions.putBundle(key, readBundleEntry(parser, values)); 1967 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1968 final int outerDepth = parser.getDepth(); 1969 ArrayList<Bundle> bundleList = new ArrayList<>(); 1970 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1971 Bundle childBundle = readBundleEntry(parser, values); 1972 bundleList.add(childBundle); 1973 } 1974 restrictions.putParcelableArray(key, 1975 bundleList.toArray(new Bundle[bundleList.size()])); 1976 } else { 1977 String value = parser.nextText().trim(); 1978 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1979 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1980 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1981 restrictions.putInt(key, Integer.parseInt(value)); 1982 } else { 1983 restrictions.putString(key, value); 1984 } 1985 } 1986 } 1987 } 1988 1989 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1990 throws IOException, XmlPullParserException { 1991 Bundle childBundle = new Bundle(); 1992 final int outerDepth = parser.getDepth(); 1993 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1994 readEntry(childBundle, values, parser); 1995 } 1996 return childBundle; 1997 } 1998 1999 private void writeApplicationRestrictionsLP(String packageName, 2000 Bundle restrictions, int userId) { 2001 AtomicFile restrictionsFile = new AtomicFile( 2002 new File(Environment.getUserSystemDirectory(userId), 2003 packageToRestrictionsFileName(packageName))); 2004 writeApplicationRestrictionsLP(restrictions, restrictionsFile); 2005 } 2006 2007 @VisibleForTesting 2008 static void writeApplicationRestrictionsLP(Bundle restrictions, AtomicFile restrictionsFile) { 2009 FileOutputStream fos = null; 2010 try { 2011 fos = restrictionsFile.startWrite(); 2012 final BufferedOutputStream bos = new BufferedOutputStream(fos); 2013 2014 final XmlSerializer serializer = new FastXmlSerializer(); 2015 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 2016 serializer.startDocument(null, true); 2017 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 2018 2019 serializer.startTag(null, TAG_RESTRICTIONS); 2020 writeBundle(restrictions, serializer); 2021 serializer.endTag(null, TAG_RESTRICTIONS); 2022 2023 serializer.endDocument(); 2024 restrictionsFile.finishWrite(fos); 2025 } catch (Exception e) { 2026 restrictionsFile.failWrite(fos); 2027 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 2028 } 2029 } 2030 2031 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 2032 throws IOException { 2033 for (String key : restrictions.keySet()) { 2034 Object value = restrictions.get(key); 2035 serializer.startTag(null, TAG_ENTRY); 2036 serializer.attribute(null, ATTR_KEY, key); 2037 2038 if (value instanceof Boolean) { 2039 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 2040 serializer.text(value.toString()); 2041 } else if (value instanceof Integer) { 2042 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 2043 serializer.text(value.toString()); 2044 } else if (value == null || value instanceof String) { 2045 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 2046 serializer.text(value != null ? (String) value : ""); 2047 } else if (value instanceof Bundle) { 2048 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 2049 writeBundle((Bundle) value, serializer); 2050 } else if (value instanceof Parcelable[]) { 2051 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 2052 Parcelable[] array = (Parcelable[]) value; 2053 for (Parcelable parcelable : array) { 2054 if (!(parcelable instanceof Bundle)) { 2055 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 2056 } 2057 serializer.startTag(null, TAG_ENTRY); 2058 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 2059 writeBundle((Bundle) parcelable, serializer); 2060 serializer.endTag(null, TAG_ENTRY); 2061 } 2062 } else { 2063 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 2064 String[] values = (String[]) value; 2065 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 2066 for (String choice : values) { 2067 serializer.startTag(null, TAG_VALUE); 2068 serializer.text(choice != null ? choice : ""); 2069 serializer.endTag(null, TAG_VALUE); 2070 } 2071 } 2072 serializer.endTag(null, TAG_ENTRY); 2073 } 2074 } 2075 2076 @Override 2077 public int getUserSerialNumber(int userHandle) { 2078 synchronized (mUsersLock) { 2079 if (!exists(userHandle)) return -1; 2080 return getUserInfoLU(userHandle).serialNumber; 2081 } 2082 } 2083 2084 @Override 2085 public int getUserHandle(int userSerialNumber) { 2086 synchronized (mUsersLock) { 2087 for (int userId : mUserIds) { 2088 UserInfo info = getUserInfoLU(userId); 2089 if (info != null && info.serialNumber == userSerialNumber) return userId; 2090 } 2091 // Not found 2092 return -1; 2093 } 2094 } 2095 2096 @Override 2097 public long getUserCreationTime(int userHandle) { 2098 int callingUserId = UserHandle.getCallingUserId(); 2099 UserInfo userInfo = null; 2100 synchronized (mUsersLock) { 2101 if (callingUserId == userHandle) { 2102 userInfo = getUserInfoLU(userHandle); 2103 } else { 2104 UserInfo parent = getProfileParentLU(userHandle); 2105 if (parent != null && parent.id == callingUserId) { 2106 userInfo = getUserInfoLU(userHandle); 2107 } 2108 } 2109 } 2110 if (userInfo == null) { 2111 throw new SecurityException("userHandle can only be the calling user or a managed " 2112 + "profile associated with this user"); 2113 } 2114 return userInfo.creationTime; 2115 } 2116 2117 /** 2118 * Caches the list of user ids in an array, adjusting the array size when necessary. 2119 */ 2120 private void updateUserIds() { 2121 int num = 0; 2122 synchronized (mUsersLock) { 2123 final int userSize = mUsers.size(); 2124 for (int i = 0; i < userSize; i++) { 2125 if (!mUsers.valueAt(i).partial) { 2126 num++; 2127 } 2128 } 2129 final int[] newUsers = new int[num]; 2130 int n = 0; 2131 for (int i = 0; i < userSize; i++) { 2132 if (!mUsers.valueAt(i).partial) { 2133 newUsers[n++] = mUsers.keyAt(i); 2134 } 2135 } 2136 mUserIds = newUsers; 2137 } 2138 } 2139 2140 /** 2141 * Make a note of the last started time of a user and do some cleanup. 2142 * @param userId the user that was just foregrounded 2143 */ 2144 public void onUserForeground(int userId) { 2145 synchronized (mPackagesLock) { 2146 UserInfo user = getUserInfoNoChecks(userId); 2147 long now = System.currentTimeMillis(); 2148 if (user == null || user.partial) { 2149 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 2150 return; 2151 } 2152 if (now > EPOCH_PLUS_30_YEARS) { 2153 user.lastLoggedInTime = now; 2154 scheduleWriteUser(user); 2155 } 2156 } 2157 } 2158 2159 /** 2160 * Returns the next available user id, filling in any holes in the ids. 2161 * TODO: May not be a good idea to recycle ids, in case it results in confusion 2162 * for data and battery stats collection, or unexpected cross-talk. 2163 * @return 2164 */ 2165 private int getNextAvailableId() { 2166 synchronized (mUsersLock) { 2167 int i = MIN_USER_ID; 2168 while (i < MAX_USER_ID) { 2169 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 2170 return i; 2171 } 2172 i++; 2173 } 2174 } 2175 throw new IllegalStateException("No user id available!"); 2176 } 2177 2178 private String packageToRestrictionsFileName(String packageName) { 2179 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 2180 } 2181 2182 /** 2183 * Create new {@code /data/user/[id]} directory and sets default 2184 * permissions. 2185 */ 2186 public static void prepareUserDirectory(Context context, String volumeUuid, int userId) { 2187 final StorageManager storage = context.getSystemService(StorageManager.class); 2188 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 2189 storage.createNewUserDir(userId, userDir); 2190 } 2191 2192 /** 2193 * Enforce that serial number stored in user directory inode matches the 2194 * given expected value. Gracefully sets the serial number if currently 2195 * undefined. 2196 * 2197 * @throws IOException when problem extracting serial number, or serial 2198 * number is mismatched. 2199 */ 2200 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 2201 final int foundSerial = getSerialNumber(file); 2202 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 2203 2204 if (foundSerial == -1) { 2205 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 2206 try { 2207 setSerialNumber(file, serialNumber); 2208 } catch (IOException e) { 2209 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 2210 } 2211 2212 } else if (foundSerial != serialNumber) { 2213 throw new IOException("Found serial number " + foundSerial 2214 + " doesn't match expected " + serialNumber); 2215 } 2216 } 2217 2218 /** 2219 * Set serial number stored in user directory inode. 2220 * 2221 * @throws IOException if serial number was already set 2222 */ 2223 private static void setSerialNumber(File file, int serialNumber) 2224 throws IOException { 2225 try { 2226 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 2227 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 2228 } catch (ErrnoException e) { 2229 throw e.rethrowAsIOException(); 2230 } 2231 } 2232 2233 /** 2234 * Return serial number stored in user directory inode. 2235 * 2236 * @return parsed serial number, or -1 if not set 2237 */ 2238 private static int getSerialNumber(File file) throws IOException { 2239 try { 2240 final byte[] buf = new byte[256]; 2241 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 2242 final String serial = new String(buf, 0, len); 2243 try { 2244 return Integer.parseInt(serial); 2245 } catch (NumberFormatException e) { 2246 throw new IOException("Bad serial number: " + serial); 2247 } 2248 } catch (ErrnoException e) { 2249 if (e.errno == OsConstants.ENODATA) { 2250 return -1; 2251 } else { 2252 throw e.rethrowAsIOException(); 2253 } 2254 } 2255 } 2256 2257 @Override 2258 public void onShellCommand(FileDescriptor in, FileDescriptor out, 2259 FileDescriptor err, String[] args, ResultReceiver resultReceiver) { 2260 (new Shell()).exec(this, in, out, err, args, resultReceiver); 2261 } 2262 2263 int onShellCommand(Shell shell, String cmd) { 2264 if (cmd == null) { 2265 return shell.handleDefaultCommands(cmd); 2266 } 2267 2268 final PrintWriter pw = shell.getOutPrintWriter(); 2269 try { 2270 switch(cmd) { 2271 case "list": 2272 return runList(pw); 2273 } 2274 } catch (RemoteException e) { 2275 pw.println("Remote exception: " + e); 2276 } 2277 return -1; 2278 } 2279 2280 private int runList(PrintWriter pw) throws RemoteException { 2281 final IActivityManager am = ActivityManagerNative.getDefault(); 2282 final List<UserInfo> users = getUsers(false); 2283 if (users == null) { 2284 pw.println("Error: couldn't get users"); 2285 return 1; 2286 } else { 2287 pw.println("Users:"); 2288 for (int i = 0; i < users.size(); i++) { 2289 String running = am.isUserRunning(users.get(i).id, 0) ? " running" : ""; 2290 pw.println("\t" + users.get(i).toString() + running); 2291 } 2292 return 0; 2293 } 2294 } 2295 2296 @Override 2297 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2298 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 2299 != PackageManager.PERMISSION_GRANTED) { 2300 pw.println("Permission Denial: can't dump UserManager from from pid=" 2301 + Binder.getCallingPid() 2302 + ", uid=" + Binder.getCallingUid() 2303 + " without permission " 2304 + android.Manifest.permission.DUMP); 2305 return; 2306 } 2307 2308 long now = System.currentTimeMillis(); 2309 StringBuilder sb = new StringBuilder(); 2310 synchronized (mPackagesLock) { 2311 synchronized (mUsersLock) { 2312 pw.println("Users:"); 2313 for (int i = 0; i < mUsers.size(); i++) { 2314 UserInfo user = mUsers.valueAt(i); 2315 if (user == null) { 2316 continue; 2317 } 2318 pw.print(" "); pw.print(user); 2319 pw.print(" serialNo="); pw.print(user.serialNumber); 2320 if (mRemovingUserIds.get(mUsers.keyAt(i))) { 2321 pw.print(" <removing> "); 2322 } 2323 if (user.partial) { 2324 pw.print(" <partial>"); 2325 } 2326 pw.println(); 2327 pw.print(" Created: "); 2328 if (user.creationTime == 0) { 2329 pw.println("<unknown>"); 2330 } else { 2331 sb.setLength(0); 2332 TimeUtils.formatDuration(now - user.creationTime, sb); 2333 sb.append(" ago"); 2334 pw.println(sb); 2335 } 2336 pw.print(" Last logged in: "); 2337 if (user.lastLoggedInTime == 0) { 2338 pw.println("<unknown>"); 2339 } else { 2340 sb.setLength(0); 2341 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2342 sb.append(" ago"); 2343 pw.println(sb); 2344 } 2345 pw.println(" Restrictions:"); 2346 synchronized (mRestrictionsLock) { 2347 UserRestrictionsUtils.dumpRestrictions( 2348 pw, " ", mBaseUserRestrictions.get(user.id)); 2349 pw.println(" Effective restrictions:"); 2350 UserRestrictionsUtils.dumpRestrictions( 2351 pw, " ", mCachedEffectiveUserRestrictions.get(user.id)); 2352 } 2353 } 2354 } 2355 pw.println(); 2356 pw.println("Guest restrictions:"); 2357 UserRestrictionsUtils.dumpRestrictions(pw, " ", mGuestRestrictions); 2358 } 2359 } 2360 2361 final class MainHandler extends Handler { 2362 2363 @Override 2364 public void handleMessage(Message msg) { 2365 switch (msg.what) { 2366 case WRITE_USER_MSG: 2367 removeMessages(WRITE_USER_MSG, msg.obj); 2368 synchronized (mPackagesLock) { 2369 int userId = ((UserInfo) msg.obj).id; 2370 UserInfo userInfo = getUserInfoNoChecks(userId); 2371 if (userInfo != null) { 2372 writeUserLP(userInfo); 2373 } 2374 } 2375 } 2376 } 2377 } 2378 2379 /** 2380 * @param userId 2381 * @return whether the user has been initialized yet 2382 */ 2383 boolean isInitialized(int userId) { 2384 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2385 } 2386 2387 private class LocalService extends UserManagerInternal { 2388 2389 @Override 2390 public Object getUserRestrictionsLock() { 2391 return mRestrictionsLock; 2392 } 2393 2394 @Override 2395 @GuardedBy("mRestrictionsLock") 2396 public void updateEffectiveUserRestrictionsLR(int userId) { 2397 UserManagerService.this.updateEffectiveUserRestrictionsLR(userId); 2398 } 2399 2400 @Override 2401 @GuardedBy("mRestrictionsLock") 2402 public void updateEffectiveUserRestrictionsForAllUsersLR() { 2403 UserManagerService.this.updateEffectiveUserRestrictionsForAllUsersLR(); 2404 } 2405 2406 @Override 2407 public Bundle getBaseUserRestrictions(int userId) { 2408 synchronized (mRestrictionsLock) { 2409 return mBaseUserRestrictions.get(userId); 2410 } 2411 } 2412 2413 @Override 2414 public void setBaseUserRestrictionsByDpmsForMigration( 2415 int userId, Bundle baseRestrictions) { 2416 synchronized (mRestrictionsLock) { 2417 mBaseUserRestrictions.put(userId, new Bundle(baseRestrictions)); 2418 invalidateEffectiveUserRestrictionsLR(userId); 2419 } 2420 2421 final UserInfo userInfo = getUserInfoNoChecks(userId); 2422 synchronized (mPackagesLock) { 2423 if (userInfo != null) { 2424 writeUserLP(userInfo); 2425 } else { 2426 Slog.w(LOG_TAG, "UserInfo not found for " + userId); 2427 } 2428 } 2429 } 2430 2431 @Override 2432 public boolean getUserRestriction(int userId, String key) { 2433 return getUserRestrictions(userId).getBoolean(key); 2434 } 2435 2436 @Override 2437 public void addUserRestrictionsListener(UserRestrictionsListener listener) { 2438 synchronized (mUserRestrictionsListeners) { 2439 mUserRestrictionsListeners.add(listener); 2440 } 2441 } 2442 2443 @Override 2444 public void removeUserRestrictionsListener(UserRestrictionsListener listener) { 2445 synchronized (mUserRestrictionsListeners) { 2446 mUserRestrictionsListeners.remove(listener); 2447 } 2448 } 2449 } 2450 2451 private class Shell extends ShellCommand { 2452 @Override 2453 public int onCommand(String cmd) { 2454 return onShellCommand(this, cmd); 2455 } 2456 2457 @Override 2458 public void onHelp() { 2459 final PrintWriter pw = getOutPrintWriter(); 2460 pw.println("User manager (user) commands:"); 2461 pw.println(" help"); 2462 pw.println(" Print this help text."); 2463 pw.println(""); 2464 pw.println(" list"); 2465 pw.println(" Prints all users on the system."); 2466 } 2467 } 2468} 2469