UserManagerService.java revision 4f16073556f7978708fb71c87628cfe1692412d5
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.pm; 18 19import android.annotation.NonNull; 20import android.annotation.Nullable; 21import android.app.Activity; 22import android.app.ActivityManager; 23import android.app.ActivityManagerInternal; 24import android.app.ActivityManagerNative; 25import android.app.IStopUserCallback; 26import android.app.admin.DevicePolicyManager; 27import android.app.admin.DevicePolicyManagerInternal; 28import android.content.BroadcastReceiver; 29import android.content.Context; 30import android.content.Intent; 31import android.content.pm.ApplicationInfo; 32import android.content.pm.PackageManager; 33import android.content.pm.PackageManager.NameNotFoundException; 34import android.content.pm.UserInfo; 35import android.graphics.Bitmap; 36import android.os.Binder; 37import android.os.Bundle; 38import android.os.Environment; 39import android.os.FileUtils; 40import android.os.Handler; 41import android.os.IUserManager; 42import android.os.Message; 43import android.os.ParcelFileDescriptor; 44import android.os.Parcelable; 45import android.os.Process; 46import android.os.RemoteException; 47import android.os.ServiceManager; 48import android.os.SystemProperties; 49import android.os.UserHandle; 50import android.os.UserManager; 51import android.os.UserManagerInternal; 52import android.os.storage.StorageManager; 53import android.os.storage.VolumeInfo; 54import android.system.ErrnoException; 55import android.system.Os; 56import android.system.OsConstants; 57import android.util.AtomicFile; 58import android.util.Log; 59import android.util.Slog; 60import android.util.SparseArray; 61import android.util.SparseBooleanArray; 62import android.util.TimeUtils; 63import android.util.Xml; 64 65import com.android.internal.annotations.GuardedBy; 66import com.android.internal.annotations.VisibleForTesting; 67import com.android.internal.app.IAppOpsService; 68import com.android.internal.util.FastXmlSerializer; 69import com.android.internal.util.Preconditions; 70import com.android.internal.util.XmlUtils; 71import com.android.server.LocalServices; 72 73import org.xmlpull.v1.XmlPullParser; 74import org.xmlpull.v1.XmlPullParserException; 75import org.xmlpull.v1.XmlSerializer; 76 77import java.io.BufferedOutputStream; 78import java.io.File; 79import java.io.FileDescriptor; 80import java.io.FileInputStream; 81import java.io.FileNotFoundException; 82import java.io.FileOutputStream; 83import java.io.IOException; 84import java.io.PrintWriter; 85import java.nio.charset.StandardCharsets; 86import java.util.ArrayList; 87import java.util.List; 88 89import libcore.io.IoUtils; 90 91/** 92 * Service for {@link UserManager}. 93 * 94 * Method naming convention: 95 * - Methods suffixed with "Locked" should be called within the {@code this} lock. 96 * - Methods suffixed with "RL" should be called within the {@link #mRestrictionsLock} lock. 97 */ 98public class UserManagerService extends IUserManager.Stub { 99 100 private static final String LOG_TAG = "UserManagerService"; 101 102 private static final boolean DBG = false; // DO NOT SUBMIT WITH TRUE 103 104 private static final String TAG_NAME = "name"; 105 private static final String ATTR_FLAGS = "flags"; 106 private static final String ATTR_ICON_PATH = "icon"; 107 private static final String ATTR_ID = "id"; 108 private static final String ATTR_CREATION_TIME = "created"; 109 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 110 private static final String ATTR_SERIAL_NO = "serialNumber"; 111 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 112 private static final String ATTR_PARTIAL = "partial"; 113 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 114 private static final String ATTR_USER_VERSION = "version"; 115 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 116 private static final String ATTR_RESTRICTED_PROFILE_PARENT_ID = "restrictedProfileParentId"; 117 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 118 private static final String TAG_USERS = "users"; 119 private static final String TAG_USER = "user"; 120 private static final String TAG_RESTRICTIONS = "restrictions"; 121 private static final String TAG_ENTRY = "entry"; 122 private static final String TAG_VALUE = "value"; 123 private static final String ATTR_KEY = "key"; 124 private static final String ATTR_VALUE_TYPE = "type"; 125 private static final String ATTR_MULTIPLE = "m"; 126 127 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 128 private static final String ATTR_TYPE_STRING = "s"; 129 private static final String ATTR_TYPE_BOOLEAN = "b"; 130 private static final String ATTR_TYPE_INTEGER = "i"; 131 private static final String ATTR_TYPE_BUNDLE = "B"; 132 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 133 134 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 135 private static final String USER_LIST_FILENAME = "userlist.xml"; 136 private static final String USER_PHOTO_FILENAME = "photo.png"; 137 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 138 139 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 140 private static final String XML_SUFFIX = ".xml"; 141 142 private static final int MIN_USER_ID = 10; 143 // We need to keep process uid within Integer.MAX_VALUE. 144 private static final int MAX_USER_ID = Integer.MAX_VALUE / UserHandle.PER_USER_RANGE; 145 146 private static final int USER_VERSION = 6; 147 148 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 149 150 // Maximum number of managed profiles permitted per user is 1. This cannot be increased 151 // without first making sure that the rest of the framework is prepared for it. 152 private static final int MAX_MANAGED_PROFILES = 1; 153 154 static final int WRITE_USER_MSG = 1; 155 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 156 157 private static final String XATTR_SERIAL = "user.serial"; 158 159 private final Context mContext; 160 private final PackageManagerService mPm; 161 private final Object mInstallLock; 162 private final Object mPackagesLock; 163 164 private final Handler mHandler; 165 166 private final File mUsersDir; 167 private final File mUserListFile; 168 169 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 170 171 private final Object mRestrictionsLock = new Object(); 172 173 /** 174 * User restrictions set via UserManager. This doesn't include restrictions set by 175 * device owner / profile owners. 176 * 177 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 178 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 179 * maybe shared between {@link #mBaseUserRestrictions} and 180 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 181 * (Otherwise we won't be able to detect what restrictions have changed in 182 * {@link #updateUserRestrictionsInternalRL). 183 */ 184 @GuardedBy("mRestrictionsLock") 185 private final SparseArray<Bundle> mBaseUserRestrictions = new SparseArray<>(); 186 187 /** 188 * Cached user restrictions that are in effect -- i.e. {@link #mBaseUserRestrictions} combined 189 * with device / profile owner restrictions. We'll initialize it lazily; use 190 * {@link #getEffectiveUserRestrictions} to access it. 191 * 192 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 193 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 194 * maybe shared between {@link #mBaseUserRestrictions} and 195 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 196 * (Otherwise we won't be able to detect what restrictions have changed in 197 * {@link #updateUserRestrictionsInternalRL). 198 */ 199 @GuardedBy("mRestrictionsLock") 200 private final SparseArray<Bundle> mCachedEffectiveUserRestrictions = new SparseArray<>(); 201 202 /** 203 * User restrictions that have already been applied in {@link #applyUserRestrictionsRL}. We 204 * use it to detect restrictions that have changed since the last 205 * {@link #applyUserRestrictionsRL} call. 206 */ 207 @GuardedBy("mRestrictionsLock") 208 private final SparseArray<Bundle> mAppliedUserRestrictions = new SparseArray<>(); 209 210 private final Bundle mGuestRestrictions = new Bundle(); 211 212 /** 213 * Set of user IDs being actively removed. Removed IDs linger in this set 214 * for several seconds to work around a VFS caching issue. 215 */ 216 // @GuardedBy("mPackagesLock") 217 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 218 219 private int[] mUserIds; 220 private int mNextSerialNumber; 221 private int mUserVersion = 0; 222 223 private IAppOpsService mAppOpsService; 224 225 private final LocalService mLocalService; 226 227 private static UserManagerService sInstance; 228 229 public static UserManagerService getInstance() { 230 synchronized (UserManagerService.class) { 231 return sInstance; 232 } 233 } 234 235 /** 236 * Available for testing purposes. 237 */ 238 UserManagerService(File dataDir, File baseUserPath) { 239 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 240 } 241 242 /** 243 * Called by package manager to create the service. This is closely 244 * associated with the package manager, and the given lock is the 245 * package manager's own lock. 246 */ 247 UserManagerService(Context context, PackageManagerService pm, 248 Object installLock, Object packagesLock) { 249 this(context, pm, installLock, packagesLock, 250 Environment.getDataDirectory(), 251 new File(Environment.getDataDirectory(), "user")); 252 } 253 254 /** 255 * Available for testing purposes. 256 */ 257 private UserManagerService(Context context, PackageManagerService pm, 258 Object installLock, Object packagesLock, 259 File dataDir, File baseUserPath) { 260 mContext = context; 261 mPm = pm; 262 mInstallLock = installLock; 263 mPackagesLock = packagesLock; 264 mHandler = new MainHandler(); 265 synchronized (mInstallLock) { 266 synchronized (mPackagesLock) { 267 mUsersDir = new File(dataDir, USER_INFO_DIR); 268 mUsersDir.mkdirs(); 269 // Make zeroth user directory, for services to migrate their files to that location 270 File userZeroDir = new File(mUsersDir, String.valueOf(UserHandle.USER_SYSTEM)); 271 userZeroDir.mkdirs(); 272 FileUtils.setPermissions(mUsersDir.toString(), 273 FileUtils.S_IRWXU|FileUtils.S_IRWXG 274 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 275 -1, -1); 276 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 277 initDefaultGuestRestrictions(); 278 readUserListLocked(); 279 sInstance = this; 280 } 281 } 282 mLocalService = new LocalService(); 283 LocalServices.addService(UserManagerInternal.class, mLocalService); 284 } 285 286 void systemReady() { 287 synchronized (mInstallLock) { 288 synchronized (mPackagesLock) { 289 // Prune out any partially created/partially removed users. 290 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 291 final int userSize = mUsers.size(); 292 for (int i = 0; i < userSize; i++) { 293 UserInfo ui = mUsers.valueAt(i); 294 if ((ui.partial || ui.guestToRemove) && i != 0) { 295 partials.add(ui); 296 } 297 } 298 final int partialsSize = partials.size(); 299 for (int i = 0; i < partialsSize; i++) { 300 UserInfo ui = partials.get(i); 301 Slog.w(LOG_TAG, "Removing partially created user " + ui.id 302 + " (name=" + ui.name + ")"); 303 removeUserStateLocked(ui.id); 304 } 305 } 306 } 307 onUserForeground(UserHandle.USER_SYSTEM); 308 mAppOpsService = IAppOpsService.Stub.asInterface( 309 ServiceManager.getService(Context.APP_OPS_SERVICE)); 310 for (int i = 0; i < mUserIds.length; ++i) { 311 final int userId = mUserIds[i]; 312 try { 313 mAppOpsService.setUserRestrictions(getEffectiveUserRestrictions(userId), userId); 314 } catch (RemoteException e) { 315 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 316 } 317 } 318 } 319 320 @Override 321 public UserInfo getPrimaryUser() { 322 checkManageUsersPermission("query users"); 323 synchronized (mPackagesLock) { 324 final int userSize = mUsers.size(); 325 for (int i = 0; i < userSize; i++) { 326 UserInfo ui = mUsers.valueAt(i); 327 if (ui.isPrimary()) { 328 return ui; 329 } 330 } 331 } 332 return null; 333 } 334 335 @Override 336 public @NonNull List<UserInfo> getUsers(boolean excludeDying) { 337 checkManageUsersPermission("query users"); 338 synchronized (mPackagesLock) { 339 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 340 final int userSize = mUsers.size(); 341 for (int i = 0; i < userSize; i++) { 342 UserInfo ui = mUsers.valueAt(i); 343 if (ui.partial) { 344 continue; 345 } 346 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 347 users.add(ui); 348 } 349 } 350 return users; 351 } 352 } 353 354 @Override 355 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 356 if (userId != UserHandle.getCallingUserId()) { 357 checkManageUsersPermission("getting profiles related to user " + userId); 358 } 359 final long ident = Binder.clearCallingIdentity(); 360 try { 361 synchronized (mPackagesLock) { 362 return getProfilesLocked(userId, enabledOnly); 363 } 364 } finally { 365 Binder.restoreCallingIdentity(ident); 366 } 367 } 368 369 /** Assume permissions already checked and caller's identity cleared */ 370 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 371 UserInfo user = getUserInfoLocked(userId); 372 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 373 if (user == null) { 374 // Probably a dying user 375 return users; 376 } 377 final int userSize = mUsers.size(); 378 for (int i = 0; i < userSize; i++) { 379 UserInfo profile = mUsers.valueAt(i); 380 if (!isProfileOf(user, profile)) { 381 continue; 382 } 383 if (enabledOnly && !profile.isEnabled()) { 384 continue; 385 } 386 if (mRemovingUserIds.get(profile.id)) { 387 continue; 388 } 389 users.add(profile); 390 } 391 return users; 392 } 393 394 @Override 395 public int getCredentialOwnerProfile(int userHandle) { 396 checkManageUsersPermission("get the credential owner"); 397 if (!"file".equals(SystemProperties.get("ro.crypto.type", "none"))) { 398 synchronized (mPackagesLock) { 399 UserInfo profileParent = getProfileParentLocked(userHandle); 400 if (profileParent != null) { 401 return profileParent.id; 402 } 403 } 404 } 405 406 return userHandle; 407 } 408 409 @Override 410 public boolean isSameProfileGroup(int userId, int otherUserId) { 411 if (userId == otherUserId) return true; 412 checkManageUsersPermission("check if in the same profile group"); 413 synchronized (mPackagesLock) { 414 return isSameProfileGroupLocked(userId, otherUserId); 415 } 416 } 417 418 private boolean isSameProfileGroupLocked(int userId, int otherUserId) { 419 UserInfo userInfo = getUserInfoLocked(userId); 420 if (userInfo == null || userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 421 return false; 422 } 423 UserInfo otherUserInfo = getUserInfoLocked(otherUserId); 424 if (otherUserInfo == null || otherUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 425 return false; 426 } 427 return userInfo.profileGroupId == otherUserInfo.profileGroupId; 428 } 429 430 @Override 431 public UserInfo getProfileParent(int userHandle) { 432 checkManageUsersPermission("get the profile parent"); 433 synchronized (mPackagesLock) { 434 return getProfileParentLocked(userHandle); 435 } 436 } 437 438 private UserInfo getProfileParentLocked(int userHandle) { 439 UserInfo profile = getUserInfoLocked(userHandle); 440 if (profile == null) { 441 return null; 442 } 443 int parentUserId = profile.profileGroupId; 444 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 445 return null; 446 } else { 447 return getUserInfoLocked(parentUserId); 448 } 449 } 450 451 private boolean isProfileOf(UserInfo user, UserInfo profile) { 452 return user.id == profile.id || 453 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 454 && user.profileGroupId == profile.profileGroupId); 455 } 456 457 @Override 458 public void setUserEnabled(int userId) { 459 checkManageUsersPermission("enable user"); 460 synchronized (mPackagesLock) { 461 UserInfo info = getUserInfoLocked(userId); 462 if (info != null && !info.isEnabled()) { 463 info.flags ^= UserInfo.FLAG_DISABLED; 464 writeUserLocked(info); 465 } 466 } 467 } 468 469 @Override 470 public UserInfo getUserInfo(int userId) { 471 checkManageUsersPermission("query user"); 472 synchronized (mPackagesLock) { 473 return getUserInfoLocked(userId); 474 } 475 } 476 477 @Override 478 public boolean isRestricted() { 479 synchronized (mPackagesLock) { 480 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 481 } 482 } 483 484 @Override 485 public boolean canHaveRestrictedProfile(int userId) { 486 checkManageUsersPermission("canHaveRestrictedProfile"); 487 synchronized (mPackagesLock) { 488 final UserInfo userInfo = getUserInfoLocked(userId); 489 if (userInfo == null || !userInfo.canHaveProfile()) { 490 return false; 491 } 492 if (!userInfo.isAdmin()) { 493 return false; 494 } 495 } 496 DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService( 497 Context.DEVICE_POLICY_SERVICE); 498 // restricted profile can be created if there is no DO set and the admin user has no PO 499 return dpm.getDeviceOwner() == null && dpm.getProfileOwnerAsUser(userId) == null; 500 } 501 502 /* 503 * Should be locked on mUsers before calling this. 504 */ 505 private UserInfo getUserInfoLocked(int userId) { 506 UserInfo ui = mUsers.get(userId); 507 // If it is partial and not in the process of being removed, return as unknown user. 508 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 509 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 510 return null; 511 } 512 return ui; 513 } 514 515 /** Called by PackageManagerService */ 516 public boolean exists(int userId) { 517 synchronized (mPackagesLock) { 518 return mUsers.get(userId) != null; 519 } 520 } 521 522 @Override 523 public void setUserName(int userId, String name) { 524 checkManageUsersPermission("rename users"); 525 boolean changed = false; 526 synchronized (mPackagesLock) { 527 UserInfo info = mUsers.get(userId); 528 if (info == null || info.partial) { 529 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 530 return; 531 } 532 if (name != null && !name.equals(info.name)) { 533 info.name = name; 534 writeUserLocked(info); 535 changed = true; 536 } 537 } 538 if (changed) { 539 sendUserInfoChangedBroadcast(userId); 540 } 541 } 542 543 @Override 544 public void setUserIcon(int userId, Bitmap bitmap) { 545 checkManageUsersPermission("update users"); 546 long ident = Binder.clearCallingIdentity(); 547 try { 548 synchronized (mPackagesLock) { 549 UserInfo info = mUsers.get(userId); 550 if (info == null || info.partial) { 551 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 552 return; 553 } 554 writeBitmapLocked(info, bitmap); 555 writeUserLocked(info); 556 } 557 sendUserInfoChangedBroadcast(userId); 558 } finally { 559 Binder.restoreCallingIdentity(ident); 560 } 561 } 562 563 private void sendUserInfoChangedBroadcast(int userId) { 564 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 565 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 566 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 567 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 568 } 569 570 @Override 571 public ParcelFileDescriptor getUserIcon(int userId) { 572 String iconPath; 573 synchronized (mPackagesLock) { 574 UserInfo info = mUsers.get(userId); 575 if (info == null || info.partial) { 576 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 577 return null; 578 } 579 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 580 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 581 || callingGroupId != info.profileGroupId) { 582 checkManageUsersPermission("get the icon of a user who is not related"); 583 } 584 if (info.iconPath == null) { 585 return null; 586 } 587 iconPath = info.iconPath; 588 } 589 590 try { 591 return ParcelFileDescriptor.open( 592 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 593 } catch (FileNotFoundException e) { 594 Log.e(LOG_TAG, "Couldn't find icon file", e); 595 } 596 return null; 597 } 598 599 public void makeInitialized(int userId) { 600 checkManageUsersPermission("makeInitialized"); 601 synchronized (mPackagesLock) { 602 UserInfo info = mUsers.get(userId); 603 if (info == null || info.partial) { 604 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 605 } 606 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 607 info.flags |= UserInfo.FLAG_INITIALIZED; 608 scheduleWriteUserLocked(info); 609 } 610 } 611 } 612 613 /** 614 * If default guest restrictions haven't been initialized yet, add the basic 615 * restrictions. 616 */ 617 private void initDefaultGuestRestrictions() { 618 if (mGuestRestrictions.isEmpty()) { 619 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 620 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 621 } 622 } 623 624 @Override 625 public Bundle getDefaultGuestRestrictions() { 626 checkManageUsersPermission("getDefaultGuestRestrictions"); 627 synchronized (mPackagesLock) { 628 return new Bundle(mGuestRestrictions); 629 } 630 } 631 632 @Override 633 public void setDefaultGuestRestrictions(Bundle restrictions) { 634 checkManageUsersPermission("setDefaultGuestRestrictions"); 635 synchronized (mPackagesLock) { 636 mGuestRestrictions.clear(); 637 mGuestRestrictions.putAll(restrictions); 638 writeUserListLocked(); 639 } 640 } 641 642 @GuardedBy("mRestrictionsLock") 643 private Bundle computeEffectiveUserRestrictionsRL(int userId) { 644 final DevicePolicyManagerInternal dpmi = 645 LocalServices.getService(DevicePolicyManagerInternal.class); 646 final Bundle systemRestrictions = mBaseUserRestrictions.get(userId); 647 648 final Bundle effective; 649 if (dpmi == null) { 650 // TODO Make sure it's because DPMS is disabled and not because we called it too early. 651 effective = systemRestrictions; 652 } else { 653 effective = dpmi.getComposedUserRestrictions(userId, systemRestrictions); 654 } 655 return effective; 656 } 657 658 @GuardedBy("mRestrictionsLock") 659 private void invalidateEffectiveUserRestrictionsRL(int userId) { 660 if (DBG) { 661 Log.d(LOG_TAG, "invalidateEffectiveUserRestrictions userId=" + userId); 662 } 663 mCachedEffectiveUserRestrictions.remove(userId); 664 } 665 666 private Bundle getEffectiveUserRestrictions(int userId) { 667 synchronized (mRestrictionsLock) { 668 Bundle restrictions = mCachedEffectiveUserRestrictions.get(userId); 669 if (restrictions == null) { 670 restrictions = computeEffectiveUserRestrictionsRL(userId); 671 mCachedEffectiveUserRestrictions.put(userId, restrictions); 672 } 673 return restrictions; 674 } 675 } 676 677 /** @return a specific user restriction that's in effect currently. */ 678 @Override 679 public boolean hasUserRestriction(String restrictionKey, int userId) { 680 Bundle restrictions = getEffectiveUserRestrictions(userId); 681 return restrictions != null && restrictions.getBoolean(restrictionKey); 682 } 683 684 /** 685 * @return UserRestrictions that are in effect currently. This always returns a new 686 * {@link Bundle}. 687 */ 688 @Override 689 public Bundle getUserRestrictions(int userId) { 690 Bundle restrictions = getEffectiveUserRestrictions(userId); 691 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 692 } 693 694 @Override 695 public void setUserRestriction(String key, boolean value, int userId) { 696 checkManageUsersPermission("setUserRestriction"); 697 if (!UserRestrictionsUtils.SYSTEM_CONTROLLED_USER_RESTRICTIONS.contains(key)) { 698 setUserRestrictionNoCheck(key, value, userId); 699 } 700 } 701 702 @Override 703 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 704 checkSystemOrRoot("setSystemControlledUserRestriction"); 705 setUserRestrictionNoCheck(key, value, userId); 706 } 707 708 private void setUserRestrictionNoCheck(String key, boolean value, int userId) { 709 synchronized (mRestrictionsLock) { 710 // Note we can't modify Bundles stored in mBaseUserRestrictions directly, so create 711 // a copy. 712 final Bundle newRestrictions = new Bundle(); 713 UserRestrictionsUtils.merge(newRestrictions, mBaseUserRestrictions.get(userId)); 714 newRestrictions.putBoolean(key, value); 715 716 updateUserRestrictionsInternalRL(newRestrictions, userId); 717 } 718 } 719 720 /** 721 * Optionally updating user restrictions, calculate the effective user restrictions by 722 * consulting {@link com.android.server.devicepolicy.DevicePolicyManagerService} and also 723 * apply it to {@link com.android.server.AppOpsService}. 724 * TODO applyUserRestrictionsLocked() should also apply to system settings. 725 * 726 * @param newRestrictions User restrictions to set. If null, only the effective restrictions 727 * will be updated. Note don't pass an existing Bundle in {@link #mBaseUserRestrictions} 728 * or {@link #mCachedEffectiveUserRestrictions}; that'll most likely cause a sub 729 * @param userId target user ID. 730 */ 731 @GuardedBy("mRestrictionsLock") 732 private void updateUserRestrictionsInternalRL( 733 @Nullable Bundle newRestrictions, int userId) { 734 if (DBG) { 735 Log.d(LOG_TAG, "updateUserRestrictionsInternalLocked userId=" + userId 736 + " bundle=" + newRestrictions); 737 } 738 // Update system restrictions. 739 if (newRestrictions != null) { 740 // If newRestrictions == the current one, it's probably a bug. 741 Preconditions.checkState(mBaseUserRestrictions.get(userId) != newRestrictions); 742 Preconditions.checkState(mCachedEffectiveUserRestrictions.get(userId) 743 != newRestrictions); 744 mBaseUserRestrictions.put(userId, newRestrictions); 745 } 746 747 final Bundle effective = computeEffectiveUserRestrictionsRL(userId); 748 749 mCachedEffectiveUserRestrictions.put(userId, effective); 750 751 applyUserRestrictionsRL(userId, effective); 752 } 753 754 @GuardedBy("mRestrictionsLock") 755 private void applyUserRestrictionsRL(int userId, Bundle newRestrictions) { 756 final Bundle prevRestrictions = mAppliedUserRestrictions.get(userId); 757 758 if (DBG) { 759 Log.d(LOG_TAG, "applyUserRestrictionsRL userId=" + userId 760 + " new=" + newRestrictions + " prev=" + prevRestrictions); 761 } 762 763 final long token = Binder.clearCallingIdentity(); 764 try { 765 mAppOpsService.setUserRestrictions(newRestrictions, userId); 766 } catch (RemoteException e) { 767 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 768 } finally { 769 Binder.restoreCallingIdentity(token); 770 } 771 772 UserRestrictionsUtils.applyUserRestrictions( 773 mContext, userId, newRestrictions, prevRestrictions); 774 775 mAppliedUserRestrictions.put(userId, new Bundle(newRestrictions)); 776 } 777 778 @GuardedBy("mRestrictionsLock") 779 private void updateEffectiveUserRestrictionsRL(int userId) { 780 updateUserRestrictionsInternalRL(null, userId); 781 } 782 783 @GuardedBy("mRestrictionsLock") 784 private void updateEffectiveUserRestrictionsForAllUsersRL() { 785 // First, invalidate all cached values. 786 mCachedEffectiveUserRestrictions.clear(); 787 788 // We don't want to call into ActivityManagerNative while taking a lock, so we'll call 789 // it on a handler. 790 final Runnable r = new Runnable() { 791 @Override 792 public void run() { 793 // Then get the list of running users. 794 final int[] runningUsers; 795 try { 796 runningUsers = ActivityManagerNative.getDefault().getRunningUserIds(); 797 } catch (RemoteException e) { 798 Log.w(LOG_TAG, "Unable to access ActivityManagerNative"); 799 return; 800 } 801 // Then re-calculate the effective restrictions and apply, only for running users. 802 // It's okay if a new user has started after the getRunningUserIds() call, 803 // because we'll do the same thing (re-calculate the restrictions and apply) 804 // when we start a user. 805 // TODO: "Apply restrictions upon user start hasn't been implemented. Implement it. 806 synchronized (mRestrictionsLock) { 807 for (int i = 0; i < runningUsers.length; i++) { 808 updateUserRestrictionsInternalRL(null, runningUsers[i]); 809 } 810 } 811 } 812 }; 813 mHandler.post(r); 814 } 815 816 /** 817 * Check if we've hit the limit of how many users can be created. 818 */ 819 private boolean isUserLimitReachedLocked() { 820 return getAliveUsersExcludingGuestsCountLocked() >= UserManager.getMaxSupportedUsers(); 821 } 822 823 @Override 824 public boolean canAddMoreManagedProfiles(int userId) { 825 checkManageUsersPermission("check if more managed profiles can be added."); 826 if (ActivityManager.isLowRamDeviceStatic()) { 827 return false; 828 } 829 if (!mContext.getPackageManager().hasSystemFeature( 830 PackageManager.FEATURE_MANAGED_USERS)) { 831 return false; 832 } 833 // Limit number of managed profiles that can be created 834 int managedProfilesCount = getProfiles(userId, true).size() - 1; 835 if (managedProfilesCount >= MAX_MANAGED_PROFILES) { 836 return false; 837 } 838 synchronized(mPackagesLock) { 839 UserInfo userInfo = getUserInfoLocked(userId); 840 if (!userInfo.canHaveProfile()) { 841 return false; 842 } 843 int usersCount = getAliveUsersExcludingGuestsCountLocked(); 844 // We allow creating a managed profile in the special case where there is only one user. 845 return usersCount == 1 || usersCount < UserManager.getMaxSupportedUsers(); 846 } 847 } 848 849 private int getAliveUsersExcludingGuestsCountLocked() { 850 int aliveUserCount = 0; 851 final int totalUserCount = mUsers.size(); 852 // Skip over users being removed 853 for (int i = 0; i < totalUserCount; i++) { 854 UserInfo user = mUsers.valueAt(i); 855 if (!mRemovingUserIds.get(user.id) 856 && !user.isGuest() && !user.partial) { 857 aliveUserCount++; 858 } 859 } 860 return aliveUserCount; 861 } 862 863 /** 864 * Enforces that only the system UID or root's UID or apps that have the 865 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 866 * permission can make certain calls to the UserManager. 867 * 868 * @param message used as message if SecurityException is thrown 869 * @throws SecurityException if the caller is not system or root 870 */ 871 private static final void checkManageUsersPermission(String message) { 872 final int uid = Binder.getCallingUid(); 873 if (uid != Process.SYSTEM_UID && uid != 0 874 && ActivityManager.checkComponentPermission( 875 android.Manifest.permission.MANAGE_USERS, 876 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 877 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 878 } 879 } 880 881 private static void checkSystemOrRoot(String message) { 882 final int uid = Binder.getCallingUid(); 883 if (uid != Process.SYSTEM_UID && uid != 0) { 884 throw new SecurityException("Only system may call: " + message); 885 } 886 } 887 888 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 889 try { 890 File dir = new File(mUsersDir, Integer.toString(info.id)); 891 File file = new File(dir, USER_PHOTO_FILENAME); 892 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 893 if (!dir.exists()) { 894 dir.mkdir(); 895 FileUtils.setPermissions( 896 dir.getPath(), 897 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 898 -1, -1); 899 } 900 FileOutputStream os; 901 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 902 && tmp.renameTo(file)) { 903 info.iconPath = file.getAbsolutePath(); 904 } 905 try { 906 os.close(); 907 } catch (IOException ioe) { 908 // What the ... ! 909 } 910 tmp.delete(); 911 } catch (FileNotFoundException e) { 912 Slog.w(LOG_TAG, "Error setting photo for user ", e); 913 } 914 } 915 916 /** 917 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 918 * cache it elsewhere. 919 * @return the array of user ids. 920 */ 921 public int[] getUserIds() { 922 synchronized (mPackagesLock) { 923 return mUserIds; 924 } 925 } 926 927 int[] getUserIdsLPr() { 928 return mUserIds; 929 } 930 931 private void readUserListLocked() { 932 if (!mUserListFile.exists()) { 933 fallbackToSingleUserLocked(); 934 return; 935 } 936 FileInputStream fis = null; 937 AtomicFile userListFile = new AtomicFile(mUserListFile); 938 try { 939 fis = userListFile.openRead(); 940 XmlPullParser parser = Xml.newPullParser(); 941 parser.setInput(fis, StandardCharsets.UTF_8.name()); 942 int type; 943 while ((type = parser.next()) != XmlPullParser.START_TAG 944 && type != XmlPullParser.END_DOCUMENT) { 945 ; 946 } 947 948 if (type != XmlPullParser.START_TAG) { 949 Slog.e(LOG_TAG, "Unable to read user list"); 950 fallbackToSingleUserLocked(); 951 return; 952 } 953 954 mNextSerialNumber = -1; 955 if (parser.getName().equals(TAG_USERS)) { 956 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 957 if (lastSerialNumber != null) { 958 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 959 } 960 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 961 if (versionNumber != null) { 962 mUserVersion = Integer.parseInt(versionNumber); 963 } 964 } 965 966 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 967 if (type == XmlPullParser.START_TAG) { 968 final String name = parser.getName(); 969 if (name.equals(TAG_USER)) { 970 String id = parser.getAttributeValue(null, ATTR_ID); 971 UserInfo user = readUserLocked(Integer.parseInt(id)); 972 973 if (user != null) { 974 mUsers.put(user.id, user); 975 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 976 mNextSerialNumber = user.id + 1; 977 } 978 } 979 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 980 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 981 && type != XmlPullParser.END_TAG) { 982 if (type == XmlPullParser.START_TAG) { 983 if (parser.getName().equals(TAG_RESTRICTIONS)) { 984 UserRestrictionsUtils 985 .readRestrictions(parser, mGuestRestrictions); 986 } 987 break; 988 } 989 } 990 } 991 } 992 } 993 updateUserIdsLocked(); 994 upgradeIfNecessaryLocked(); 995 } catch (IOException ioe) { 996 fallbackToSingleUserLocked(); 997 } catch (XmlPullParserException pe) { 998 fallbackToSingleUserLocked(); 999 } finally { 1000 if (fis != null) { 1001 try { 1002 fis.close(); 1003 } catch (IOException e) { 1004 } 1005 } 1006 } 1007 } 1008 1009 /** 1010 * Upgrade steps between versions, either for fixing bugs or changing the data format. 1011 */ 1012 private void upgradeIfNecessaryLocked() { 1013 int userVersion = mUserVersion; 1014 if (userVersion < 1) { 1015 // Assign a proper name for the owner, if not initialized correctly before 1016 UserInfo user = mUsers.get(UserHandle.USER_SYSTEM); 1017 if ("Primary".equals(user.name)) { 1018 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 1019 scheduleWriteUserLocked(user); 1020 } 1021 userVersion = 1; 1022 } 1023 1024 if (userVersion < 2) { 1025 // Owner should be marked as initialized 1026 UserInfo user = mUsers.get(UserHandle.USER_SYSTEM); 1027 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 1028 user.flags |= UserInfo.FLAG_INITIALIZED; 1029 scheduleWriteUserLocked(user); 1030 } 1031 userVersion = 2; 1032 } 1033 1034 1035 if (userVersion < 4) { 1036 userVersion = 4; 1037 } 1038 1039 if (userVersion < 5) { 1040 initDefaultGuestRestrictions(); 1041 userVersion = 5; 1042 } 1043 1044 if (userVersion < 6) { 1045 final boolean splitSystemUser = UserManager.isSplitSystemUser(); 1046 for (int i = 0; i < mUsers.size(); i++) { 1047 UserInfo user = mUsers.valueAt(i); 1048 // In non-split mode, only user 0 can have restricted profiles 1049 if (!splitSystemUser && user.isRestricted() 1050 && (user.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID)) { 1051 user.restrictedProfileParentId = UserHandle.USER_SYSTEM; 1052 scheduleWriteUserLocked(user); 1053 } 1054 } 1055 userVersion = 6; 1056 } 1057 1058 if (userVersion < USER_VERSION) { 1059 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 1060 + USER_VERSION); 1061 } else { 1062 mUserVersion = userVersion; 1063 writeUserListLocked(); 1064 } 1065 } 1066 1067 private void fallbackToSingleUserLocked() { 1068 int flags = UserInfo.FLAG_INITIALIZED; 1069 // In split system user mode, the admin and primary flags are assigned to the first human 1070 // user. 1071 if (!UserManager.isSplitSystemUser()) { 1072 flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY; 1073 } 1074 // Create the system user 1075 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 1076 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 1077 flags); 1078 mUsers.put(system.id, system); 1079 mNextSerialNumber = MIN_USER_ID; 1080 mUserVersion = USER_VERSION; 1081 1082 Bundle restrictions = new Bundle(); 1083 synchronized (mRestrictionsLock) { 1084 mBaseUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 1085 } 1086 1087 updateUserIdsLocked(); 1088 initDefaultGuestRestrictions(); 1089 1090 writeUserListLocked(); 1091 writeUserLocked(system); 1092 } 1093 1094 private void scheduleWriteUserLocked(UserInfo userInfo) { 1095 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 1096 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 1097 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 1098 } 1099 } 1100 1101 /* 1102 * Writes the user file in this format: 1103 * 1104 * <user flags="20039023" id="0"> 1105 * <name>Primary</name> 1106 * </user> 1107 */ 1108 private void writeUserLocked(UserInfo userInfo) { 1109 FileOutputStream fos = null; 1110 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 1111 try { 1112 fos = userFile.startWrite(); 1113 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1114 1115 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1116 final XmlSerializer serializer = new FastXmlSerializer(); 1117 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1118 serializer.startDocument(null, true); 1119 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1120 1121 serializer.startTag(null, TAG_USER); 1122 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 1123 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 1124 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 1125 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 1126 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 1127 Long.toString(userInfo.lastLoggedInTime)); 1128 if (userInfo.iconPath != null) { 1129 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 1130 } 1131 if (userInfo.partial) { 1132 serializer.attribute(null, ATTR_PARTIAL, "true"); 1133 } 1134 if (userInfo.guestToRemove) { 1135 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 1136 } 1137 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 1138 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 1139 Integer.toString(userInfo.profileGroupId)); 1140 } 1141 if (userInfo.restrictedProfileParentId != UserInfo.NO_PROFILE_GROUP_ID) { 1142 serializer.attribute(null, ATTR_RESTRICTED_PROFILE_PARENT_ID, 1143 Integer.toString(userInfo.restrictedProfileParentId)); 1144 } 1145 serializer.startTag(null, TAG_NAME); 1146 serializer.text(userInfo.name); 1147 serializer.endTag(null, TAG_NAME); 1148 Bundle restrictions; 1149 synchronized (mRestrictionsLock) { 1150 restrictions = mBaseUserRestrictions.get(userInfo.id); 1151 } 1152 if (restrictions != null) { 1153 UserRestrictionsUtils 1154 .writeRestrictions(serializer, restrictions, TAG_RESTRICTIONS); 1155 } 1156 serializer.endTag(null, TAG_USER); 1157 1158 serializer.endDocument(); 1159 userFile.finishWrite(fos); 1160 } catch (Exception ioe) { 1161 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 1162 userFile.failWrite(fos); 1163 } 1164 } 1165 1166 /* 1167 * Writes the user list file in this format: 1168 * 1169 * <users nextSerialNumber="3"> 1170 * <user id="0"></user> 1171 * <user id="2"></user> 1172 * </users> 1173 */ 1174 private void writeUserListLocked() { 1175 FileOutputStream fos = null; 1176 AtomicFile userListFile = new AtomicFile(mUserListFile); 1177 try { 1178 fos = userListFile.startWrite(); 1179 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1180 1181 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1182 final XmlSerializer serializer = new FastXmlSerializer(); 1183 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1184 serializer.startDocument(null, true); 1185 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1186 1187 serializer.startTag(null, TAG_USERS); 1188 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 1189 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 1190 1191 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 1192 UserRestrictionsUtils 1193 .writeRestrictions(serializer, mGuestRestrictions, TAG_RESTRICTIONS); 1194 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 1195 final int userSize = mUsers.size(); 1196 for (int i = 0; i < userSize; i++) { 1197 UserInfo user = mUsers.valueAt(i); 1198 serializer.startTag(null, TAG_USER); 1199 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 1200 serializer.endTag(null, TAG_USER); 1201 } 1202 1203 serializer.endTag(null, TAG_USERS); 1204 1205 serializer.endDocument(); 1206 userListFile.finishWrite(fos); 1207 } catch (Exception e) { 1208 userListFile.failWrite(fos); 1209 Slog.e(LOG_TAG, "Error writing user list"); 1210 } 1211 } 1212 1213 private UserInfo readUserLocked(int id) { 1214 int flags = 0; 1215 int serialNumber = id; 1216 String name = null; 1217 String iconPath = null; 1218 long creationTime = 0L; 1219 long lastLoggedInTime = 0L; 1220 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1221 int restrictedProfileParentId = UserInfo.NO_PROFILE_GROUP_ID; 1222 boolean partial = false; 1223 boolean guestToRemove = false; 1224 Bundle restrictions = new Bundle(); 1225 1226 FileInputStream fis = null; 1227 try { 1228 AtomicFile userFile = 1229 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1230 fis = userFile.openRead(); 1231 XmlPullParser parser = Xml.newPullParser(); 1232 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1233 int type; 1234 while ((type = parser.next()) != XmlPullParser.START_TAG 1235 && type != XmlPullParser.END_DOCUMENT) { 1236 ; 1237 } 1238 1239 if (type != XmlPullParser.START_TAG) { 1240 Slog.e(LOG_TAG, "Unable to read user " + id); 1241 return null; 1242 } 1243 1244 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1245 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1246 if (storedId != id) { 1247 Slog.e(LOG_TAG, "User id does not match the file name"); 1248 return null; 1249 } 1250 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1251 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1252 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1253 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1254 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1255 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1256 UserInfo.NO_PROFILE_GROUP_ID); 1257 restrictedProfileParentId = readIntAttribute(parser, 1258 ATTR_RESTRICTED_PROFILE_PARENT_ID, UserInfo.NO_PROFILE_GROUP_ID); 1259 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1260 if ("true".equals(valueString)) { 1261 partial = true; 1262 } 1263 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1264 if ("true".equals(valueString)) { 1265 guestToRemove = true; 1266 } 1267 1268 int outerDepth = parser.getDepth(); 1269 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1270 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1271 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1272 continue; 1273 } 1274 String tag = parser.getName(); 1275 if (TAG_NAME.equals(tag)) { 1276 type = parser.next(); 1277 if (type == XmlPullParser.TEXT) { 1278 name = parser.getText(); 1279 } 1280 } else if (TAG_RESTRICTIONS.equals(tag)) { 1281 UserRestrictionsUtils.readRestrictions(parser, restrictions); 1282 } 1283 } 1284 } 1285 1286 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1287 userInfo.serialNumber = serialNumber; 1288 userInfo.creationTime = creationTime; 1289 userInfo.lastLoggedInTime = lastLoggedInTime; 1290 userInfo.partial = partial; 1291 userInfo.guestToRemove = guestToRemove; 1292 userInfo.profileGroupId = profileGroupId; 1293 userInfo.restrictedProfileParentId = restrictedProfileParentId; 1294 synchronized (mRestrictionsLock) { 1295 mBaseUserRestrictions.append(id, restrictions); 1296 } 1297 return userInfo; 1298 1299 } catch (IOException ioe) { 1300 } catch (XmlPullParserException pe) { 1301 } finally { 1302 if (fis != null) { 1303 try { 1304 fis.close(); 1305 } catch (IOException e) { 1306 } 1307 } 1308 } 1309 return null; 1310 } 1311 1312 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1313 String valueString = parser.getAttributeValue(null, attr); 1314 if (valueString == null) return defaultValue; 1315 try { 1316 return Integer.parseInt(valueString); 1317 } catch (NumberFormatException nfe) { 1318 return defaultValue; 1319 } 1320 } 1321 1322 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1323 String valueString = parser.getAttributeValue(null, attr); 1324 if (valueString == null) return defaultValue; 1325 try { 1326 return Long.parseLong(valueString); 1327 } catch (NumberFormatException nfe) { 1328 return defaultValue; 1329 } 1330 } 1331 1332 private boolean isPackageInstalled(String pkg, int userId) { 1333 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1334 PackageManager.GET_UNINSTALLED_PACKAGES, 1335 userId); 1336 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1337 return false; 1338 } 1339 return true; 1340 } 1341 1342 /** 1343 * Removes all the restrictions files (res_<packagename>) for a given user. 1344 * Does not do any permissions checking. 1345 */ 1346 private void cleanAppRestrictions(int userId) { 1347 synchronized (mPackagesLock) { 1348 File dir = Environment.getUserSystemDirectory(userId); 1349 String[] files = dir.list(); 1350 if (files == null) return; 1351 for (String fileName : files) { 1352 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1353 File resFile = new File(dir, fileName); 1354 if (resFile.exists()) { 1355 resFile.delete(); 1356 } 1357 } 1358 } 1359 } 1360 } 1361 1362 /** 1363 * Removes the app restrictions file for a specific package and user id, if it exists. 1364 */ 1365 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1366 synchronized (mPackagesLock) { 1367 File dir = Environment.getUserSystemDirectory(userId); 1368 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1369 if (resFile.exists()) { 1370 resFile.delete(); 1371 } 1372 } 1373 } 1374 1375 @Override 1376 public UserInfo createProfileForUser(String name, int flags, int userId) { 1377 checkManageUsersPermission("Only the system can create users"); 1378 return createUserInternal(name, flags, userId); 1379 } 1380 1381 @Override 1382 public UserInfo createUser(String name, int flags) { 1383 checkManageUsersPermission("Only the system can create users"); 1384 return createUserInternal(name, flags, UserHandle.USER_NULL); 1385 } 1386 1387 private UserInfo createUserInternal(String name, int flags, int parentId) { 1388 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1389 UserManager.DISALLOW_ADD_USER, false)) { 1390 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1391 return null; 1392 } 1393 if (ActivityManager.isLowRamDeviceStatic()) { 1394 return null; 1395 } 1396 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1397 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1398 final boolean isRestricted = (flags & UserInfo.FLAG_RESTRICTED) != 0; 1399 final long ident = Binder.clearCallingIdentity(); 1400 UserInfo userInfo = null; 1401 final int userId; 1402 try { 1403 synchronized (mInstallLock) { 1404 synchronized (mPackagesLock) { 1405 UserInfo parent = null; 1406 if (parentId != UserHandle.USER_NULL) { 1407 parent = getUserInfoLocked(parentId); 1408 if (parent == null) return null; 1409 } 1410 if (isManagedProfile && !canAddMoreManagedProfiles(parentId)) { 1411 Log.e(LOG_TAG, "Cannot add more managed profiles for user " + parentId); 1412 return null; 1413 } 1414 if (!isGuest && !isManagedProfile && isUserLimitReachedLocked()) { 1415 // If we're not adding a guest user or a managed profile and the limit has 1416 // been reached, cannot add a user. 1417 return null; 1418 } 1419 // If we're adding a guest and there already exists one, bail. 1420 if (isGuest && findCurrentGuestUserLocked() != null) { 1421 return null; 1422 } 1423 // In legacy mode, restricted profile's parent can only be the owner user 1424 if (isRestricted && !UserManager.isSplitSystemUser() 1425 && (parentId != UserHandle.USER_SYSTEM)) { 1426 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1427 return null; 1428 } 1429 if (isRestricted && UserManager.isSplitSystemUser()) { 1430 if (parent == null) { 1431 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be " 1432 + "specified"); 1433 return null; 1434 } 1435 if (!parent.canHaveProfile()) { 1436 Log.w(LOG_TAG, "Cannot add restricted profile - profiles cannot be " 1437 + "created for the specified parent user id " + parentId); 1438 return null; 1439 } 1440 } 1441 // In split system user mode, we assign the first human user the primary flag. 1442 // And if there is no device owner, we also assign the admin flag to primary 1443 // user. 1444 if (UserManager.isSplitSystemUser() 1445 && !isGuest && !isManagedProfile && getPrimaryUser() == null) { 1446 flags |= UserInfo.FLAG_PRIMARY; 1447 DevicePolicyManager devicePolicyManager = (DevicePolicyManager) 1448 mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); 1449 if (devicePolicyManager == null 1450 || devicePolicyManager.getDeviceOwner() == null) { 1451 flags |= UserInfo.FLAG_ADMIN; 1452 } 1453 } 1454 userId = getNextAvailableIdLocked(); 1455 userInfo = new UserInfo(userId, name, null, flags); 1456 userInfo.serialNumber = mNextSerialNumber++; 1457 long now = System.currentTimeMillis(); 1458 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1459 userInfo.partial = true; 1460 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1461 mUsers.put(userId, userInfo); 1462 writeUserListLocked(); 1463 if (parent != null) { 1464 if (isManagedProfile) { 1465 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1466 parent.profileGroupId = parent.id; 1467 scheduleWriteUserLocked(parent); 1468 } 1469 userInfo.profileGroupId = parent.profileGroupId; 1470 } else if (isRestricted) { 1471 if (!parent.canHaveProfile()) { 1472 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1473 } 1474 if (parent.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID) { 1475 parent.restrictedProfileParentId = parent.id; 1476 scheduleWriteUserLocked(parent); 1477 } 1478 userInfo.restrictedProfileParentId = parent.restrictedProfileParentId; 1479 } 1480 } 1481 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1482 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1483 final String volumeUuid = vol.getFsUuid(); 1484 try { 1485 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1486 userId); 1487 prepareUserDirectory(mContext, volumeUuid, userId); 1488 enforceSerialNumber(userDir, userInfo.serialNumber); 1489 } catch (IOException e) { 1490 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1491 } 1492 } 1493 mPm.createNewUserLILPw(userId); 1494 userInfo.partial = false; 1495 scheduleWriteUserLocked(userInfo); 1496 updateUserIdsLocked(); 1497 Bundle restrictions = new Bundle(); 1498 synchronized (mRestrictionsLock) { 1499 mBaseUserRestrictions.append(userId, restrictions); 1500 } 1501 } 1502 } 1503 mPm.newUserCreated(userId); 1504 if (userInfo != null) { 1505 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1506 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1507 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1508 android.Manifest.permission.MANAGE_USERS); 1509 } 1510 } finally { 1511 Binder.restoreCallingIdentity(ident); 1512 } 1513 return userInfo; 1514 } 1515 1516 /** 1517 * @hide 1518 */ 1519 public UserInfo createRestrictedProfile(String name, int parentUserId) { 1520 checkManageUsersPermission("setupRestrictedProfile"); 1521 final UserInfo user = createProfileForUser(name, UserInfo.FLAG_RESTRICTED, parentUserId); 1522 if (user == null) { 1523 return null; 1524 } 1525 setUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS, true, user.id); 1526 // Change the setting before applying the DISALLOW_SHARE_LOCATION restriction, otherwise 1527 // the putIntForUser() will fail. 1528 android.provider.Settings.Secure.putIntForUser(mContext.getContentResolver(), 1529 android.provider.Settings.Secure.LOCATION_MODE, 1530 android.provider.Settings.Secure.LOCATION_MODE_OFF, user.id); 1531 setUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, true, user.id); 1532 return user; 1533 } 1534 1535 /** 1536 * Find the current guest user. If the Guest user is partial, 1537 * then do not include it in the results as it is about to die. 1538 */ 1539 private UserInfo findCurrentGuestUserLocked() { 1540 final int size = mUsers.size(); 1541 for (int i = 0; i < size; i++) { 1542 final UserInfo user = mUsers.valueAt(i); 1543 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1544 return user; 1545 } 1546 } 1547 return null; 1548 } 1549 1550 /** 1551 * Mark this guest user for deletion to allow us to create another guest 1552 * and switch to that user before actually removing this guest. 1553 * @param userHandle the userid of the current guest 1554 * @return whether the user could be marked for deletion 1555 */ 1556 public boolean markGuestForDeletion(int userHandle) { 1557 checkManageUsersPermission("Only the system can remove users"); 1558 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1559 UserManager.DISALLOW_REMOVE_USER, false)) { 1560 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1561 return false; 1562 } 1563 1564 long ident = Binder.clearCallingIdentity(); 1565 try { 1566 final UserInfo user; 1567 synchronized (mPackagesLock) { 1568 user = mUsers.get(userHandle); 1569 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1570 return false; 1571 } 1572 if (!user.isGuest()) { 1573 return false; 1574 } 1575 // We set this to a guest user that is to be removed. This is a temporary state 1576 // where we are allowed to add new Guest users, even if this one is still not 1577 // removed. This user will still show up in getUserInfo() calls. 1578 // If we don't get around to removing this Guest user, it will be purged on next 1579 // startup. 1580 user.guestToRemove = true; 1581 // Mark it as disabled, so that it isn't returned any more when 1582 // profiles are queried. 1583 user.flags |= UserInfo.FLAG_DISABLED; 1584 writeUserLocked(user); 1585 } 1586 } finally { 1587 Binder.restoreCallingIdentity(ident); 1588 } 1589 return true; 1590 } 1591 1592 /** 1593 * Removes a user and all data directories created for that user. This method should be called 1594 * after the user's processes have been terminated. 1595 * @param userHandle the user's id 1596 */ 1597 public boolean removeUser(int userHandle) { 1598 checkManageUsersPermission("Only the system can remove users"); 1599 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1600 UserManager.DISALLOW_REMOVE_USER, false)) { 1601 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1602 return false; 1603 } 1604 1605 long ident = Binder.clearCallingIdentity(); 1606 try { 1607 final UserInfo user; 1608 int currentUser = ActivityManager.getCurrentUser(); 1609 if (currentUser == userHandle) { 1610 Log.w(LOG_TAG, "Current user cannot be removed"); 1611 return false; 1612 } 1613 synchronized (mPackagesLock) { 1614 user = mUsers.get(userHandle); 1615 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1616 return false; 1617 } 1618 1619 // We remember deleted user IDs to prevent them from being 1620 // reused during the current boot; they can still be reused 1621 // after a reboot. 1622 mRemovingUserIds.put(userHandle, true); 1623 1624 try { 1625 mAppOpsService.removeUser(userHandle); 1626 } catch (RemoteException e) { 1627 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1628 } 1629 // Set this to a partially created user, so that the user will be purged 1630 // on next startup, in case the runtime stops now before stopping and 1631 // removing the user completely. 1632 user.partial = true; 1633 // Mark it as disabled, so that it isn't returned any more when 1634 // profiles are queried. 1635 user.flags |= UserInfo.FLAG_DISABLED; 1636 writeUserLocked(user); 1637 } 1638 1639 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1640 && user.isManagedProfile()) { 1641 // Send broadcast to notify system that the user removed was a 1642 // managed user. 1643 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1644 } 1645 1646 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1647 int res; 1648 try { 1649 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1650 new IStopUserCallback.Stub() { 1651 @Override 1652 public void userStopped(int userId) { 1653 finishRemoveUser(userId); 1654 } 1655 @Override 1656 public void userStopAborted(int userId) { 1657 } 1658 }); 1659 } catch (RemoteException e) { 1660 return false; 1661 } 1662 return res == ActivityManager.USER_OP_SUCCESS; 1663 } finally { 1664 Binder.restoreCallingIdentity(ident); 1665 } 1666 } 1667 1668 void finishRemoveUser(final int userHandle) { 1669 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1670 // Let other services shutdown any activity and clean up their state before completely 1671 // wiping the user's system directory and removing from the user list 1672 long ident = Binder.clearCallingIdentity(); 1673 try { 1674 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1675 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1676 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1677 android.Manifest.permission.MANAGE_USERS, 1678 1679 new BroadcastReceiver() { 1680 @Override 1681 public void onReceive(Context context, Intent intent) { 1682 if (DBG) { 1683 Slog.i(LOG_TAG, 1684 "USER_REMOVED broadcast sent, cleaning up user data " 1685 + userHandle); 1686 } 1687 new Thread() { 1688 public void run() { 1689 // Clean up any ActivityManager state 1690 LocalServices.getService(ActivityManagerInternal.class) 1691 .onUserRemoved(userHandle); 1692 synchronized (mInstallLock) { 1693 synchronized (mPackagesLock) { 1694 removeUserStateLocked(userHandle); 1695 } 1696 } 1697 } 1698 }.start(); 1699 } 1700 }, 1701 1702 null, Activity.RESULT_OK, null, null); 1703 } finally { 1704 Binder.restoreCallingIdentity(ident); 1705 } 1706 } 1707 1708 private void removeUserStateLocked(final int userHandle) { 1709 mContext.getSystemService(StorageManager.class) 1710 .deleteUserKey(userHandle); 1711 // Cleanup package manager settings 1712 mPm.cleanUpUserLILPw(this, userHandle); 1713 1714 // Remove this user from the list 1715 mUsers.remove(userHandle); 1716 // Remove user file 1717 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1718 userFile.delete(); 1719 // Update the user list 1720 writeUserListLocked(); 1721 updateUserIdsLocked(); 1722 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1723 } 1724 1725 private void removeDirectoryRecursive(File parent) { 1726 if (parent.isDirectory()) { 1727 String[] files = parent.list(); 1728 for (String filename : files) { 1729 File child = new File(parent, filename); 1730 removeDirectoryRecursive(child); 1731 } 1732 } 1733 parent.delete(); 1734 } 1735 1736 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1737 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1738 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1739 Intent.FLAG_RECEIVER_FOREGROUND); 1740 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1741 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1742 } 1743 1744 @Override 1745 public Bundle getApplicationRestrictions(String packageName) { 1746 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1747 } 1748 1749 @Override 1750 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1751 if (UserHandle.getCallingUserId() != userId 1752 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1753 checkManageUsersPermission("get application restrictions for other users/apps"); 1754 } 1755 synchronized (mPackagesLock) { 1756 // Read the restrictions from XML 1757 return readApplicationRestrictionsLocked(packageName, userId); 1758 } 1759 } 1760 1761 @Override 1762 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1763 int userId) { 1764 checkManageUsersPermission("set application restrictions"); 1765 synchronized (mPackagesLock) { 1766 if (restrictions == null || restrictions.isEmpty()) { 1767 cleanAppRestrictionsForPackage(packageName, userId); 1768 } else { 1769 // Write the restrictions to XML 1770 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1771 } 1772 } 1773 1774 if (isPackageInstalled(packageName, userId)) { 1775 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1776 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1777 changeIntent.setPackage(packageName); 1778 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1779 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1780 } 1781 } 1782 1783 private void unhideAllInstalledAppsForUser(final int userHandle) { 1784 mHandler.post(new Runnable() { 1785 @Override 1786 public void run() { 1787 List<ApplicationInfo> apps = 1788 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1789 userHandle).getList(); 1790 final long ident = Binder.clearCallingIdentity(); 1791 try { 1792 for (ApplicationInfo appInfo : apps) { 1793 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1794 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1795 != 0) { 1796 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1797 userHandle); 1798 } 1799 } 1800 } finally { 1801 Binder.restoreCallingIdentity(ident); 1802 } 1803 } 1804 }); 1805 } 1806 private int getUidForPackage(String packageName) { 1807 long ident = Binder.clearCallingIdentity(); 1808 try { 1809 return mContext.getPackageManager().getApplicationInfo(packageName, 1810 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1811 } catch (NameNotFoundException nnfe) { 1812 return -1; 1813 } finally { 1814 Binder.restoreCallingIdentity(ident); 1815 } 1816 } 1817 1818 private Bundle readApplicationRestrictionsLocked(String packageName, 1819 int userId) { 1820 AtomicFile restrictionsFile = 1821 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1822 packageToRestrictionsFileName(packageName))); 1823 return readApplicationRestrictionsLocked(restrictionsFile); 1824 } 1825 1826 @VisibleForTesting 1827 static Bundle readApplicationRestrictionsLocked(AtomicFile restrictionsFile) { 1828 final Bundle restrictions = new Bundle(); 1829 final ArrayList<String> values = new ArrayList<>(); 1830 if (!restrictionsFile.getBaseFile().exists()) { 1831 return restrictions; 1832 } 1833 1834 FileInputStream fis = null; 1835 try { 1836 fis = restrictionsFile.openRead(); 1837 XmlPullParser parser = Xml.newPullParser(); 1838 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1839 XmlUtils.nextElement(parser); 1840 if (parser.getEventType() != XmlPullParser.START_TAG) { 1841 Slog.e(LOG_TAG, "Unable to read restrictions file " 1842 + restrictionsFile.getBaseFile()); 1843 return restrictions; 1844 } 1845 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1846 readEntry(restrictions, values, parser); 1847 } 1848 } catch (IOException|XmlPullParserException e) { 1849 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1850 } finally { 1851 IoUtils.closeQuietly(fis); 1852 } 1853 return restrictions; 1854 } 1855 1856 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1857 XmlPullParser parser) throws XmlPullParserException, IOException { 1858 int type = parser.getEventType(); 1859 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1860 String key = parser.getAttributeValue(null, ATTR_KEY); 1861 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1862 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1863 if (multiple != null) { 1864 values.clear(); 1865 int count = Integer.parseInt(multiple); 1866 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1867 if (type == XmlPullParser.START_TAG 1868 && parser.getName().equals(TAG_VALUE)) { 1869 values.add(parser.nextText().trim()); 1870 count--; 1871 } 1872 } 1873 String [] valueStrings = new String[values.size()]; 1874 values.toArray(valueStrings); 1875 restrictions.putStringArray(key, valueStrings); 1876 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1877 restrictions.putBundle(key, readBundleEntry(parser, values)); 1878 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1879 final int outerDepth = parser.getDepth(); 1880 ArrayList<Bundle> bundleList = new ArrayList<>(); 1881 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1882 Bundle childBundle = readBundleEntry(parser, values); 1883 bundleList.add(childBundle); 1884 } 1885 restrictions.putParcelableArray(key, 1886 bundleList.toArray(new Bundle[bundleList.size()])); 1887 } else { 1888 String value = parser.nextText().trim(); 1889 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1890 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1891 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1892 restrictions.putInt(key, Integer.parseInt(value)); 1893 } else { 1894 restrictions.putString(key, value); 1895 } 1896 } 1897 } 1898 } 1899 1900 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1901 throws IOException, XmlPullParserException { 1902 Bundle childBundle = new Bundle(); 1903 final int outerDepth = parser.getDepth(); 1904 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1905 readEntry(childBundle, values, parser); 1906 } 1907 return childBundle; 1908 } 1909 1910 private void writeApplicationRestrictionsLocked(String packageName, 1911 Bundle restrictions, int userId) { 1912 AtomicFile restrictionsFile = new AtomicFile( 1913 new File(Environment.getUserSystemDirectory(userId), 1914 packageToRestrictionsFileName(packageName))); 1915 writeApplicationRestrictionsLocked(restrictions, restrictionsFile); 1916 } 1917 1918 @VisibleForTesting 1919 static void writeApplicationRestrictionsLocked(Bundle restrictions, 1920 AtomicFile restrictionsFile) { 1921 FileOutputStream fos = null; 1922 try { 1923 fos = restrictionsFile.startWrite(); 1924 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1925 1926 final XmlSerializer serializer = new FastXmlSerializer(); 1927 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1928 serializer.startDocument(null, true); 1929 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1930 1931 serializer.startTag(null, TAG_RESTRICTIONS); 1932 writeBundle(restrictions, serializer); 1933 serializer.endTag(null, TAG_RESTRICTIONS); 1934 1935 serializer.endDocument(); 1936 restrictionsFile.finishWrite(fos); 1937 } catch (Exception e) { 1938 restrictionsFile.failWrite(fos); 1939 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 1940 } 1941 } 1942 1943 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1944 throws IOException { 1945 for (String key : restrictions.keySet()) { 1946 Object value = restrictions.get(key); 1947 serializer.startTag(null, TAG_ENTRY); 1948 serializer.attribute(null, ATTR_KEY, key); 1949 1950 if (value instanceof Boolean) { 1951 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1952 serializer.text(value.toString()); 1953 } else if (value instanceof Integer) { 1954 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1955 serializer.text(value.toString()); 1956 } else if (value == null || value instanceof String) { 1957 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1958 serializer.text(value != null ? (String) value : ""); 1959 } else if (value instanceof Bundle) { 1960 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1961 writeBundle((Bundle) value, serializer); 1962 } else if (value instanceof Parcelable[]) { 1963 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 1964 Parcelable[] array = (Parcelable[]) value; 1965 for (Parcelable parcelable : array) { 1966 if (!(parcelable instanceof Bundle)) { 1967 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 1968 } 1969 serializer.startTag(null, TAG_ENTRY); 1970 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1971 writeBundle((Bundle) parcelable, serializer); 1972 serializer.endTag(null, TAG_ENTRY); 1973 } 1974 } else { 1975 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1976 String[] values = (String[]) value; 1977 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1978 for (String choice : values) { 1979 serializer.startTag(null, TAG_VALUE); 1980 serializer.text(choice != null ? choice : ""); 1981 serializer.endTag(null, TAG_VALUE); 1982 } 1983 } 1984 serializer.endTag(null, TAG_ENTRY); 1985 } 1986 } 1987 1988 @Override 1989 public int getUserSerialNumber(int userHandle) { 1990 synchronized (mPackagesLock) { 1991 if (!exists(userHandle)) return -1; 1992 return getUserInfoLocked(userHandle).serialNumber; 1993 } 1994 } 1995 1996 @Override 1997 public int getUserHandle(int userSerialNumber) { 1998 synchronized (mPackagesLock) { 1999 for (int userId : mUserIds) { 2000 UserInfo info = getUserInfoLocked(userId); 2001 if (info != null && info.serialNumber == userSerialNumber) return userId; 2002 } 2003 // Not found 2004 return -1; 2005 } 2006 } 2007 2008 @Override 2009 public long getUserCreationTime(int userHandle) { 2010 int callingUserId = UserHandle.getCallingUserId(); 2011 UserInfo userInfo = null; 2012 synchronized (mPackagesLock) { 2013 if (callingUserId == userHandle) { 2014 userInfo = getUserInfoLocked(userHandle); 2015 } else { 2016 UserInfo parent = getProfileParentLocked(userHandle); 2017 if (parent != null && parent.id == callingUserId) { 2018 userInfo = getUserInfoLocked(userHandle); 2019 } 2020 } 2021 } 2022 if (userInfo == null) { 2023 throw new SecurityException("userHandle can only be the calling user or a managed " 2024 + "profile associated with this user"); 2025 } 2026 return userInfo.creationTime; 2027 } 2028 2029 /** 2030 * Caches the list of user ids in an array, adjusting the array size when necessary. 2031 */ 2032 private void updateUserIdsLocked() { 2033 int num = 0; 2034 final int userSize = mUsers.size(); 2035 for (int i = 0; i < userSize; i++) { 2036 if (!mUsers.valueAt(i).partial) { 2037 num++; 2038 } 2039 } 2040 final int[] newUsers = new int[num]; 2041 int n = 0; 2042 for (int i = 0; i < userSize; i++) { 2043 if (!mUsers.valueAt(i).partial) { 2044 newUsers[n++] = mUsers.keyAt(i); 2045 } 2046 } 2047 mUserIds = newUsers; 2048 } 2049 2050 /** 2051 * Make a note of the last started time of a user and do some cleanup. 2052 * @param userId the user that was just foregrounded 2053 */ 2054 public void onUserForeground(int userId) { 2055 synchronized (mPackagesLock) { 2056 UserInfo user = mUsers.get(userId); 2057 long now = System.currentTimeMillis(); 2058 if (user == null || user.partial) { 2059 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 2060 return; 2061 } 2062 if (now > EPOCH_PLUS_30_YEARS) { 2063 user.lastLoggedInTime = now; 2064 scheduleWriteUserLocked(user); 2065 } 2066 } 2067 } 2068 2069 /** 2070 * Returns the next available user id, filling in any holes in the ids. 2071 * TODO: May not be a good idea to recycle ids, in case it results in confusion 2072 * for data and battery stats collection, or unexpected cross-talk. 2073 * @return 2074 */ 2075 private int getNextAvailableIdLocked() { 2076 synchronized (mPackagesLock) { 2077 int i = MIN_USER_ID; 2078 while (i < MAX_USER_ID) { 2079 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 2080 return i; 2081 } 2082 i++; 2083 } 2084 } 2085 throw new IllegalStateException("No user id available!"); 2086 } 2087 2088 private String packageToRestrictionsFileName(String packageName) { 2089 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 2090 } 2091 2092 /** 2093 * Create new {@code /data/user/[id]} directory and sets default 2094 * permissions. 2095 */ 2096 public static void prepareUserDirectory(Context context, String volumeUuid, int userId) { 2097 final StorageManager storage = context.getSystemService(StorageManager.class); 2098 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 2099 storage.createNewUserDir(userId, userDir); 2100 } 2101 2102 /** 2103 * Enforce that serial number stored in user directory inode matches the 2104 * given expected value. Gracefully sets the serial number if currently 2105 * undefined. 2106 * 2107 * @throws IOException when problem extracting serial number, or serial 2108 * number is mismatched. 2109 */ 2110 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 2111 final int foundSerial = getSerialNumber(file); 2112 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 2113 2114 if (foundSerial == -1) { 2115 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 2116 try { 2117 setSerialNumber(file, serialNumber); 2118 } catch (IOException e) { 2119 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 2120 } 2121 2122 } else if (foundSerial != serialNumber) { 2123 throw new IOException("Found serial number " + foundSerial 2124 + " doesn't match expected " + serialNumber); 2125 } 2126 } 2127 2128 /** 2129 * Set serial number stored in user directory inode. 2130 * 2131 * @throws IOException if serial number was already set 2132 */ 2133 private static void setSerialNumber(File file, int serialNumber) 2134 throws IOException { 2135 try { 2136 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 2137 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 2138 } catch (ErrnoException e) { 2139 throw e.rethrowAsIOException(); 2140 } 2141 } 2142 2143 /** 2144 * Return serial number stored in user directory inode. 2145 * 2146 * @return parsed serial number, or -1 if not set 2147 */ 2148 private static int getSerialNumber(File file) throws IOException { 2149 try { 2150 final byte[] buf = new byte[256]; 2151 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 2152 final String serial = new String(buf, 0, len); 2153 try { 2154 return Integer.parseInt(serial); 2155 } catch (NumberFormatException e) { 2156 throw new IOException("Bad serial number: " + serial); 2157 } 2158 } catch (ErrnoException e) { 2159 if (e.errno == OsConstants.ENODATA) { 2160 return -1; 2161 } else { 2162 throw e.rethrowAsIOException(); 2163 } 2164 } 2165 } 2166 2167 @Override 2168 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2169 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 2170 != PackageManager.PERMISSION_GRANTED) { 2171 pw.println("Permission Denial: can't dump UserManager from from pid=" 2172 + Binder.getCallingPid() 2173 + ", uid=" + Binder.getCallingUid() 2174 + " without permission " 2175 + android.Manifest.permission.DUMP); 2176 return; 2177 } 2178 2179 long now = System.currentTimeMillis(); 2180 StringBuilder sb = new StringBuilder(); 2181 synchronized (mPackagesLock) { 2182 pw.println("Users:"); 2183 for (int i = 0; i < mUsers.size(); i++) { 2184 UserInfo user = mUsers.valueAt(i); 2185 if (user == null) continue; 2186 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 2187 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 2188 if (user.partial) pw.print(" <partial>"); 2189 pw.println(); 2190 pw.print(" Created: "); 2191 if (user.creationTime == 0) { 2192 pw.println("<unknown>"); 2193 } else { 2194 sb.setLength(0); 2195 TimeUtils.formatDuration(now - user.creationTime, sb); 2196 sb.append(" ago"); 2197 pw.println(sb); 2198 } 2199 pw.print(" Last logged in: "); 2200 if (user.lastLoggedInTime == 0) { 2201 pw.println("<unknown>"); 2202 } else { 2203 sb.setLength(0); 2204 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2205 sb.append(" ago"); 2206 pw.println(sb); 2207 } 2208 pw.println(" Restrictions:"); 2209 UserRestrictionsUtils.dumpRestrictions( 2210 pw, " ", mBaseUserRestrictions.get(user.id)); 2211 pw.println(" Effective restrictions:"); 2212 UserRestrictionsUtils.dumpRestrictions( 2213 pw, " ", mCachedEffectiveUserRestrictions.get(user.id)); 2214 } 2215 pw.println(); 2216 pw.println("Guest restrictions:"); 2217 UserRestrictionsUtils.dumpRestrictions(pw, " ", mGuestRestrictions); 2218 } 2219 } 2220 2221 final class MainHandler extends Handler { 2222 2223 @Override 2224 public void handleMessage(Message msg) { 2225 switch (msg.what) { 2226 case WRITE_USER_MSG: 2227 removeMessages(WRITE_USER_MSG, msg.obj); 2228 synchronized (mPackagesLock) { 2229 int userId = ((UserInfo) msg.obj).id; 2230 UserInfo userInfo = mUsers.get(userId); 2231 if (userInfo != null) { 2232 writeUserLocked(userInfo); 2233 } 2234 } 2235 } 2236 } 2237 } 2238 2239 /** 2240 * @param userId 2241 * @return whether the user has been initialized yet 2242 */ 2243 boolean isInitialized(int userId) { 2244 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2245 } 2246 2247 private class LocalService extends UserManagerInternal { 2248 2249 @Override 2250 public Object getUserRestrictionsLock() { 2251 return mRestrictionsLock; 2252 } 2253 2254 @Override 2255 @GuardedBy("mRestrictionsLock") 2256 public void updateEffectiveUserRestrictionsRL(int userId) { 2257 UserManagerService.this.updateEffectiveUserRestrictionsRL(userId); 2258 } 2259 2260 @Override 2261 @GuardedBy("mRestrictionsLock") 2262 public void updateEffectiveUserRestrictionsForAllUsersRL() { 2263 UserManagerService.this.updateEffectiveUserRestrictionsForAllUsersRL(); 2264 } 2265 2266 @Override 2267 public Bundle getBaseUserRestrictions(int userId) { 2268 synchronized (mRestrictionsLock) { 2269 return mBaseUserRestrictions.get(userId); 2270 } 2271 } 2272 2273 @Override 2274 public void setBaseUserRestrictionsByDpmsForMigration( 2275 int userId, Bundle baseRestrictions) { 2276 synchronized (mRestrictionsLock) { 2277 mBaseUserRestrictions.put(userId, new Bundle(baseRestrictions)); 2278 invalidateEffectiveUserRestrictionsRL(userId); 2279 } 2280 2281 synchronized (mPackagesLock) { 2282 final UserInfo userInfo = mUsers.get(userId); 2283 if (userInfo != null) { 2284 writeUserLocked(userInfo); 2285 } else { 2286 Slog.w(LOG_TAG, "UserInfo not found for " + userId); 2287 } 2288 } 2289 } 2290 } 2291} 2292