UserManagerService.java revision 07387fedfafa72bcb68defd801eef82f1f494d7c
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.storage.StorageManager; 56import android.os.storage.VolumeInfo; 57import android.system.ErrnoException; 58import android.system.Os; 59import android.system.OsConstants; 60import android.util.AtomicFile; 61import android.util.Log; 62import android.util.Slog; 63import android.util.SparseArray; 64import android.util.SparseBooleanArray; 65import android.util.TimeUtils; 66import android.util.Xml; 67 68import com.android.internal.annotations.GuardedBy; 69import com.android.internal.annotations.VisibleForTesting; 70import com.android.internal.app.IAppOpsService; 71import com.android.internal.util.FastXmlSerializer; 72import com.android.internal.util.Preconditions; 73import com.android.internal.util.XmlUtils; 74import com.android.server.LocalServices; 75 76import org.xmlpull.v1.XmlPullParser; 77import org.xmlpull.v1.XmlPullParserException; 78import org.xmlpull.v1.XmlSerializer; 79 80import java.io.BufferedOutputStream; 81import java.io.File; 82import java.io.FileDescriptor; 83import java.io.FileInputStream; 84import java.io.FileNotFoundException; 85import java.io.FileOutputStream; 86import java.io.IOException; 87import java.io.PrintWriter; 88import java.nio.charset.StandardCharsets; 89import java.util.ArrayList; 90import java.util.List; 91 92import libcore.io.IoUtils; 93 94/** 95 * Service for {@link UserManager}. 96 * 97 * Method naming convention: 98 * <ul> 99 * <li> Methods suffixed with "LILP" should be called within {@link #mInstallLock} and 100 * {@link #mPackagesLock} locks obtained in the respective order. 101 * <li> Methods suffixed with "LR" should be called within the {@link #mRestrictionsLock} lock. 102 * <li> Methods suffixed with "LU" should be called within the {@link #mUsersLock} lock. 103 * </ul> 104 */ 105public class UserManagerService extends IUserManager.Stub { 106 private static final String LOG_TAG = "UserManagerService"; 107 private static final boolean DBG = false; // DO NOT SUBMIT WITH TRUE 108 109 private static final String TAG_NAME = "name"; 110 private static final String ATTR_FLAGS = "flags"; 111 private static final String ATTR_ICON_PATH = "icon"; 112 private static final String ATTR_ID = "id"; 113 private static final String ATTR_CREATION_TIME = "created"; 114 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 115 private static final String ATTR_SERIAL_NO = "serialNumber"; 116 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 117 private static final String ATTR_PARTIAL = "partial"; 118 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 119 private static final String ATTR_USER_VERSION = "version"; 120 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 121 private static final String ATTR_RESTRICTED_PROFILE_PARENT_ID = "restrictedProfileParentId"; 122 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 123 private static final String TAG_USERS = "users"; 124 private static final String TAG_USER = "user"; 125 private static final String TAG_RESTRICTIONS = "restrictions"; 126 private static final String TAG_ENTRY = "entry"; 127 private static final String TAG_VALUE = "value"; 128 private static final String ATTR_KEY = "key"; 129 private static final String ATTR_VALUE_TYPE = "type"; 130 private static final String ATTR_MULTIPLE = "m"; 131 132 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 133 private static final String ATTR_TYPE_STRING = "s"; 134 private static final String ATTR_TYPE_BOOLEAN = "b"; 135 private static final String ATTR_TYPE_INTEGER = "i"; 136 private static final String ATTR_TYPE_BUNDLE = "B"; 137 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 138 139 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 140 private static final String USER_LIST_FILENAME = "userlist.xml"; 141 private static final String USER_PHOTO_FILENAME = "photo.png"; 142 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 143 144 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 145 private static final String XML_SUFFIX = ".xml"; 146 147 private static final int MIN_USER_ID = 10; 148 // We need to keep process uid within Integer.MAX_VALUE. 149 private static final int MAX_USER_ID = Integer.MAX_VALUE / UserHandle.PER_USER_RANGE; 150 151 private static final int USER_VERSION = 6; 152 153 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 154 155 // Maximum number of managed profiles permitted per user is 1. This cannot be increased 156 // without first making sure that the rest of the framework is prepared for it. 157 private static final int MAX_MANAGED_PROFILES = 1; 158 159 static final int WRITE_USER_MSG = 1; 160 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 161 162 private static final String XATTR_SERIAL = "user.serial"; 163 164 private final Context mContext; 165 private final PackageManagerService mPm; 166 private final Object mInstallLock; 167 private final Object mPackagesLock; 168 // Short-term lock for internal state, when interaction/sync with PM is not required 169 private final Object mUsersLock = new Object(); 170 private final Object mRestrictionsLock = new Object(); 171 172 private final Handler mHandler; 173 174 private final File mUsersDir; 175 private final File mUserListFile; 176 177 @GuardedBy("mUsersLock") 178 private final SparseArray<UserInfo> mUsers = new SparseArray<>(); 179 180 /** 181 * User restrictions set via UserManager. This doesn't include restrictions set by 182 * device owner / profile owners. 183 * 184 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 185 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 186 * maybe shared between {@link #mBaseUserRestrictions} and 187 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 188 * (Otherwise we won't be able to detect what restrictions have changed in 189 * {@link #updateUserRestrictionsInternalLR}. 190 */ 191 @GuardedBy("mRestrictionsLock") 192 private final SparseArray<Bundle> mBaseUserRestrictions = new SparseArray<>(); 193 194 /** 195 * Cached user restrictions that are in effect -- i.e. {@link #mBaseUserRestrictions} combined 196 * with device / profile owner restrictions. We'll initialize it lazily; use 197 * {@link #getEffectiveUserRestrictions} to access it. 198 * 199 * DO NOT Change existing {@link Bundle} in it. When changing a restriction for a user, 200 * a new {@link Bundle} should always be created and set. This is because a {@link Bundle} 201 * maybe shared between {@link #mBaseUserRestrictions} and 202 * {@link #mCachedEffectiveUserRestrictions}, but they should always updated separately. 203 * (Otherwise we won't be able to detect what restrictions have changed in 204 * {@link #updateUserRestrictionsInternalLR}. 205 */ 206 @GuardedBy("mRestrictionsLock") 207 private final SparseArray<Bundle> mCachedEffectiveUserRestrictions = new SparseArray<>(); 208 209 /** 210 * User restrictions that have already been applied in {@link #applyUserRestrictionsLR}. We 211 * use it to detect restrictions that have changed since the last 212 * {@link #applyUserRestrictionsLR} call. 213 */ 214 @GuardedBy("mRestrictionsLock") 215 private final SparseArray<Bundle> mAppliedUserRestrictions = new SparseArray<>(); 216 217 private final Bundle mGuestRestrictions = new Bundle(); 218 219 /** 220 * Set of user IDs being actively removed. Removed IDs linger in this set 221 * for several seconds to work around a VFS caching issue. 222 */ 223 @GuardedBy("mUsersLock") 224 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 225 226 @GuardedBy("mUsersLock") 227 private int[] mUserIds; 228 private int mNextSerialNumber; 229 private int mUserVersion = 0; 230 231 private IAppOpsService mAppOpsService; 232 233 private final LocalService mLocalService; 234 235 private static UserManagerService sInstance; 236 237 public static UserManagerService getInstance() { 238 synchronized (UserManagerService.class) { 239 return sInstance; 240 } 241 } 242 243 /** 244 * Available for testing purposes. 245 */ 246 UserManagerService(File dataDir, File baseUserPath) { 247 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 248 } 249 250 /** 251 * Called by package manager to create the service. This is closely 252 * associated with the package manager, and the given lock is the 253 * package manager's own lock. 254 */ 255 UserManagerService(Context context, PackageManagerService pm, 256 Object installLock, Object packagesLock) { 257 this(context, pm, installLock, packagesLock, 258 Environment.getDataDirectory(), 259 new File(Environment.getDataDirectory(), "user")); 260 } 261 262 /** 263 * Available for testing purposes. 264 */ 265 private UserManagerService(Context context, PackageManagerService pm, 266 Object installLock, Object packagesLock, 267 File dataDir, File baseUserPath) { 268 mContext = context; 269 mPm = pm; 270 mInstallLock = installLock; 271 mPackagesLock = packagesLock; 272 mHandler = new MainHandler(); 273 synchronized (mInstallLock) { 274 synchronized (mPackagesLock) { 275 mUsersDir = new File(dataDir, USER_INFO_DIR); 276 mUsersDir.mkdirs(); 277 // Make zeroth user directory, for services to migrate their files to that location 278 File userZeroDir = new File(mUsersDir, String.valueOf(UserHandle.USER_SYSTEM)); 279 userZeroDir.mkdirs(); 280 FileUtils.setPermissions(mUsersDir.toString(), 281 FileUtils.S_IRWXU|FileUtils.S_IRWXG 282 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 283 -1, -1); 284 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 285 initDefaultGuestRestrictions(); 286 readUserListLILP(); 287 sInstance = this; 288 } 289 } 290 mLocalService = new LocalService(); 291 LocalServices.addService(UserManagerInternal.class, mLocalService); 292 } 293 294 void systemReady() { 295 synchronized (mInstallLock) { 296 synchronized (mPackagesLock) { 297 synchronized (mUsersLock) { 298 // Prune out any partially created/partially removed users. 299 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 300 final int userSize = mUsers.size(); 301 for (int i = 0; i < userSize; i++) { 302 UserInfo ui = mUsers.valueAt(i); 303 if ((ui.partial || ui.guestToRemove) && i != 0) { 304 partials.add(ui); 305 } 306 } 307 final int partialsSize = partials.size(); 308 for (int i = 0; i < partialsSize; i++) { 309 UserInfo ui = partials.get(i); 310 Slog.w(LOG_TAG, "Removing partially created user " + ui.id 311 + " (name=" + ui.name + ")"); 312 removeUserStateLILP(ui.id); 313 } 314 } 315 } 316 } 317 onUserForeground(UserHandle.USER_SYSTEM); 318 mAppOpsService = IAppOpsService.Stub.asInterface( 319 ServiceManager.getService(Context.APP_OPS_SERVICE)); 320 for (int i = 0; i < mUserIds.length; ++i) { 321 final int userId = mUserIds[i]; 322 try { 323 mAppOpsService.setUserRestrictions(getEffectiveUserRestrictions(userId), userId); 324 } catch (RemoteException e) { 325 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 326 } 327 } 328 } 329 330 @Override 331 public UserInfo getPrimaryUser() { 332 checkManageUsersPermission("query users"); 333 synchronized (mUsersLock) { 334 final int userSize = mUsers.size(); 335 for (int i = 0; i < userSize; i++) { 336 UserInfo ui = mUsers.valueAt(i); 337 if (ui.isPrimary()) { 338 return ui; 339 } 340 } 341 } 342 return null; 343 } 344 345 @Override 346 public @NonNull List<UserInfo> getUsers(boolean excludeDying) { 347 checkManageUsersPermission("query users"); 348 synchronized (mUsersLock) { 349 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 350 final int userSize = mUsers.size(); 351 for (int i = 0; i < userSize; i++) { 352 UserInfo ui = mUsers.valueAt(i); 353 if (ui.partial) { 354 continue; 355 } 356 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 357 users.add(ui); 358 } 359 } 360 return users; 361 } 362 } 363 364 @Override 365 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 366 if (userId != UserHandle.getCallingUserId()) { 367 checkManageUsersPermission("getting profiles related to user " + userId); 368 } 369 final long ident = Binder.clearCallingIdentity(); 370 try { 371 synchronized (mUsersLock) { 372 return getProfilesLU(userId, enabledOnly); 373 } 374 } finally { 375 Binder.restoreCallingIdentity(ident); 376 } 377 } 378 379 /** Assume permissions already checked and caller's identity cleared */ 380 private List<UserInfo> getProfilesLU(int userId, boolean enabledOnly) { 381 UserInfo user = getUserInfoLU(userId); 382 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 383 if (user == null) { 384 // Probably a dying user 385 return users; 386 } 387 final int userSize = mUsers.size(); 388 for (int i = 0; i < userSize; i++) { 389 UserInfo profile = mUsers.valueAt(i); 390 if (!isProfileOf(user, profile)) { 391 continue; 392 } 393 if (enabledOnly && !profile.isEnabled()) { 394 continue; 395 } 396 if (mRemovingUserIds.get(profile.id)) { 397 continue; 398 } 399 users.add(profile); 400 } 401 return users; 402 } 403 404 @Override 405 public int getCredentialOwnerProfile(int userHandle) { 406 checkManageUsersPermission("get the credential owner"); 407 if (!"file".equals(SystemProperties.get("ro.crypto.type", "none"))) { 408 synchronized (mUsersLock) { 409 UserInfo profileParent = getProfileParentLU(userHandle); 410 if (profileParent != null) { 411 return profileParent.id; 412 } 413 } 414 } 415 416 return userHandle; 417 } 418 419 @Override 420 public boolean isSameProfileGroup(int userId, int otherUserId) { 421 if (userId == otherUserId) return true; 422 checkManageUsersPermission("check if in the same profile group"); 423 synchronized (mPackagesLock) { 424 return isSameProfileGroupLP(userId, otherUserId); 425 } 426 } 427 428 private boolean isSameProfileGroupLP(int userId, int otherUserId) { 429 synchronized (mUsersLock) { 430 UserInfo userInfo = getUserInfoLU(userId); 431 if (userInfo == null || userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 432 return false; 433 } 434 UserInfo otherUserInfo = getUserInfoLU(otherUserId); 435 if (otherUserInfo == null 436 || otherUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 437 return false; 438 } 439 return userInfo.profileGroupId == otherUserInfo.profileGroupId; 440 } 441 } 442 443 @Override 444 public UserInfo getProfileParent(int userHandle) { 445 checkManageUsersPermission("get the profile parent"); 446 synchronized (mUsersLock) { 447 return getProfileParentLU(userHandle); 448 } 449 } 450 451 private UserInfo getProfileParentLU(int userHandle) { 452 UserInfo profile = getUserInfoLU(userHandle); 453 if (profile == null) { 454 return null; 455 } 456 int parentUserId = profile.profileGroupId; 457 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 458 return null; 459 } else { 460 return getUserInfoLU(parentUserId); 461 } 462 } 463 464 private static boolean isProfileOf(UserInfo user, UserInfo profile) { 465 return user.id == profile.id || 466 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 467 && user.profileGroupId == profile.profileGroupId); 468 } 469 470 @Override 471 public void setUserEnabled(int userId) { 472 checkManageUsersPermission("enable user"); 473 synchronized (mPackagesLock) { 474 UserInfo info; 475 synchronized (mUsersLock) { 476 info = getUserInfoLU(userId); 477 } 478 if (info != null && !info.isEnabled()) { 479 info.flags ^= UserInfo.FLAG_DISABLED; 480 writeUserLP(info); 481 } 482 } 483 } 484 485 @Override 486 public UserInfo getUserInfo(int userId) { 487 checkManageUsersPermission("query user"); 488 synchronized (mUsersLock) { 489 return getUserInfoLU(userId); 490 } 491 } 492 493 @Override 494 public boolean isRestricted() { 495 synchronized (mUsersLock) { 496 return getUserInfoLU(UserHandle.getCallingUserId()).isRestricted(); 497 } 498 } 499 500 @Override 501 public boolean canHaveRestrictedProfile(int userId) { 502 checkManageUsersPermission("canHaveRestrictedProfile"); 503 synchronized (mUsersLock) { 504 final UserInfo userInfo = getUserInfoLU(userId); 505 if (userInfo == null || !userInfo.canHaveProfile()) { 506 return false; 507 } 508 if (!userInfo.isAdmin()) { 509 return false; 510 } 511 } 512 DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService( 513 Context.DEVICE_POLICY_SERVICE); 514 // restricted profile can be created if there is no DO set and the admin user has no PO 515 return dpm.getDeviceOwner() == null && dpm.getProfileOwnerAsUser(userId) == null; 516 } 517 518 /* 519 * Should be locked on mUsers before calling this. 520 */ 521 private UserInfo getUserInfoLU(int userId) { 522 UserInfo ui = mUsers.get(userId); 523 // If it is partial and not in the process of being removed, return as unknown user. 524 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 525 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 526 return null; 527 } 528 return ui; 529 } 530 531 /** 532 * Obtains {@link #mUsersLock} and return UserInfo from mUsers. 533 * <p>No permissions checking or any addition checks are made</p> 534 */ 535 private UserInfo getUserInfoNoChecks(int userId) { 536 synchronized (mUsersLock) { 537 return mUsers.get(userId); 538 } 539 } 540 541 /** Called by PackageManagerService */ 542 public boolean exists(int userId) { 543 return getUserInfoNoChecks(userId) != null; 544 } 545 546 @Override 547 public void setUserName(int userId, String name) { 548 checkManageUsersPermission("rename users"); 549 boolean changed = false; 550 synchronized (mPackagesLock) { 551 UserInfo info = getUserInfoNoChecks(userId); 552 if (info == null || info.partial) { 553 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 554 return; 555 } 556 if (name != null && !name.equals(info.name)) { 557 info.name = name; 558 writeUserLP(info); 559 changed = true; 560 } 561 } 562 if (changed) { 563 sendUserInfoChangedBroadcast(userId); 564 } 565 } 566 567 @Override 568 public void setUserIcon(int userId, Bitmap bitmap) { 569 checkManageUsersPermission("update users"); 570 long ident = Binder.clearCallingIdentity(); 571 try { 572 synchronized (mPackagesLock) { 573 UserInfo info = getUserInfoNoChecks(userId); 574 if (info == null || info.partial) { 575 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 576 return; 577 } 578 writeBitmapLP(info, bitmap); 579 writeUserLP(info); 580 } 581 sendUserInfoChangedBroadcast(userId); 582 } finally { 583 Binder.restoreCallingIdentity(ident); 584 } 585 } 586 587 private void sendUserInfoChangedBroadcast(int userId) { 588 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 589 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 590 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 591 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 592 } 593 594 @Override 595 public ParcelFileDescriptor getUserIcon(int userId) { 596 String iconPath; 597 synchronized (mPackagesLock) { 598 UserInfo info = getUserInfoNoChecks(userId); 599 if (info == null || info.partial) { 600 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 601 return null; 602 } 603 int callingGroupId = getUserInfoNoChecks(UserHandle.getCallingUserId()).profileGroupId; 604 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 605 || callingGroupId != info.profileGroupId) { 606 checkManageUsersPermission("get the icon of a user who is not related"); 607 } 608 if (info.iconPath == null) { 609 return null; 610 } 611 iconPath = info.iconPath; 612 } 613 614 try { 615 return ParcelFileDescriptor.open( 616 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 617 } catch (FileNotFoundException e) { 618 Log.e(LOG_TAG, "Couldn't find icon file", e); 619 } 620 return null; 621 } 622 623 public void makeInitialized(int userId) { 624 checkManageUsersPermission("makeInitialized"); 625 synchronized (mPackagesLock) { 626 UserInfo info = getUserInfoNoChecks(userId); 627 if (info == null || info.partial) { 628 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 629 // TODO Check if we should return here instead of a null check below 630 } 631 if (info != null && (info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 632 info.flags |= UserInfo.FLAG_INITIALIZED; 633 scheduleWriteUserLP(info); 634 } 635 } 636 } 637 638 /** 639 * If default guest restrictions haven't been initialized yet, add the basic 640 * restrictions. 641 */ 642 private void initDefaultGuestRestrictions() { 643 if (mGuestRestrictions.isEmpty()) { 644 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 645 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 646 } 647 } 648 649 @Override 650 public Bundle getDefaultGuestRestrictions() { 651 checkManageUsersPermission("getDefaultGuestRestrictions"); 652 // TODO Switch to mGuestRestrictions for locking 653 synchronized (mPackagesLock) { 654 return new Bundle(mGuestRestrictions); 655 } 656 } 657 658 @Override 659 public void setDefaultGuestRestrictions(Bundle restrictions) { 660 checkManageUsersPermission("setDefaultGuestRestrictions"); 661 synchronized (mInstallLock) { 662 synchronized (mPackagesLock) { 663 mGuestRestrictions.clear(); 664 mGuestRestrictions.putAll(restrictions); 665 writeUserListLILP(); 666 } 667 } 668 } 669 670 @GuardedBy("mRestrictionsLock") 671 private Bundle computeEffectiveUserRestrictionsLR(int userId) { 672 final DevicePolicyManagerInternal dpmi = 673 LocalServices.getService(DevicePolicyManagerInternal.class); 674 final Bundle systemRestrictions = mBaseUserRestrictions.get(userId); 675 676 final Bundle effective; 677 if (dpmi == null) { 678 // TODO Make sure it's because DPMS is disabled and not because we called it too early. 679 effective = systemRestrictions; 680 } else { 681 effective = dpmi.getComposedUserRestrictions(userId, systemRestrictions); 682 } 683 return effective; 684 } 685 686 @GuardedBy("mRestrictionsLock") 687 private void invalidateEffectiveUserRestrictionsLR(int userId) { 688 if (DBG) { 689 Log.d(LOG_TAG, "invalidateEffectiveUserRestrictions userId=" + userId); 690 } 691 mCachedEffectiveUserRestrictions.remove(userId); 692 } 693 694 private Bundle getEffectiveUserRestrictions(int userId) { 695 synchronized (mRestrictionsLock) { 696 Bundle restrictions = mCachedEffectiveUserRestrictions.get(userId); 697 if (restrictions == null) { 698 restrictions = computeEffectiveUserRestrictionsLR(userId); 699 mCachedEffectiveUserRestrictions.put(userId, restrictions); 700 } 701 return restrictions; 702 } 703 } 704 705 /** @return a specific user restriction that's in effect currently. */ 706 @Override 707 public boolean hasUserRestriction(String restrictionKey, int userId) { 708 Bundle restrictions = getEffectiveUserRestrictions(userId); 709 return restrictions != null && restrictions.getBoolean(restrictionKey); 710 } 711 712 /** 713 * @return UserRestrictions that are in effect currently. This always returns a new 714 * {@link Bundle}. 715 */ 716 @Override 717 public Bundle getUserRestrictions(int userId) { 718 Bundle restrictions = getEffectiveUserRestrictions(userId); 719 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 720 } 721 722 @Override 723 public void setUserRestriction(String key, boolean value, int userId) { 724 checkManageUsersPermission("setUserRestriction"); 725 if (!UserRestrictionsUtils.SYSTEM_CONTROLLED_USER_RESTRICTIONS.contains(key)) { 726 setUserRestrictionNoCheck(key, value, userId); 727 } 728 } 729 730 @Override 731 public void setSystemControlledUserRestriction(String key, boolean value, int userId) { 732 checkSystemOrRoot("setSystemControlledUserRestriction"); 733 setUserRestrictionNoCheck(key, value, userId); 734 } 735 736 private void setUserRestrictionNoCheck(String key, boolean value, int userId) { 737 synchronized (mRestrictionsLock) { 738 // Note we can't modify Bundles stored in mBaseUserRestrictions directly, so create 739 // a copy. 740 final Bundle newRestrictions = new Bundle(); 741 UserRestrictionsUtils.merge(newRestrictions, mBaseUserRestrictions.get(userId)); 742 newRestrictions.putBoolean(key, value); 743 744 updateUserRestrictionsInternalLR(newRestrictions, userId); 745 } 746 } 747 748 /** 749 * Optionally updating user restrictions, calculate the effective user restrictions by 750 * consulting {@link com.android.server.devicepolicy.DevicePolicyManagerService} and also 751 * apply it to {@link com.android.server.AppOpsService}. 752 * TODO applyUserRestrictionsLocked() should also apply to system settings. 753 * 754 * @param newRestrictions User restrictions to set. If null, only the effective restrictions 755 * will be updated. Note don't pass an existing Bundle in {@link #mBaseUserRestrictions} 756 * or {@link #mCachedEffectiveUserRestrictions}; that'll most likely cause a sub 757 * @param userId target user ID. 758 */ 759 @GuardedBy("mRestrictionsLock") 760 private void updateUserRestrictionsInternalLR( 761 @Nullable Bundle newRestrictions, int userId) { 762 if (DBG) { 763 Log.d(LOG_TAG, "updateUserRestrictionsInternalLocked userId=" + userId 764 + " bundle=" + newRestrictions); 765 } 766 // Update system restrictions. 767 if (newRestrictions != null) { 768 // If newRestrictions == the current one, it's probably a bug. 769 Preconditions.checkState(mBaseUserRestrictions.get(userId) != newRestrictions); 770 Preconditions.checkState(mCachedEffectiveUserRestrictions.get(userId) 771 != newRestrictions); 772 mBaseUserRestrictions.put(userId, newRestrictions); 773 } 774 775 final Bundle effective = computeEffectiveUserRestrictionsLR(userId); 776 777 mCachedEffectiveUserRestrictions.put(userId, effective); 778 779 applyUserRestrictionsLR(userId, effective); 780 } 781 782 @GuardedBy("mRestrictionsLock") 783 private void applyUserRestrictionsLR(int userId, Bundle newRestrictions) { 784 final Bundle prevRestrictions = mAppliedUserRestrictions.get(userId); 785 786 if (DBG) { 787 Log.d(LOG_TAG, "applyUserRestrictionsRL userId=" + userId 788 + " new=" + newRestrictions + " prev=" + prevRestrictions); 789 } 790 791 final long token = Binder.clearCallingIdentity(); 792 try { 793 mAppOpsService.setUserRestrictions(newRestrictions, userId); 794 } catch (RemoteException e) { 795 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 796 } finally { 797 Binder.restoreCallingIdentity(token); 798 } 799 800 UserRestrictionsUtils.applyUserRestrictions( 801 mContext, userId, newRestrictions, prevRestrictions); 802 803 mAppliedUserRestrictions.put(userId, new Bundle(newRestrictions)); 804 } 805 806 @GuardedBy("mRestrictionsLock") 807 private void updateEffectiveUserRestrictionsLR(int userId) { 808 updateUserRestrictionsInternalLR(null, userId); 809 } 810 811 @GuardedBy("mRestrictionsLock") 812 private void updateEffectiveUserRestrictionsForAllUsersLR() { 813 // First, invalidate all cached values. 814 mCachedEffectiveUserRestrictions.clear(); 815 816 // We don't want to call into ActivityManagerNative while taking a lock, so we'll call 817 // it on a handler. 818 final Runnable r = new Runnable() { 819 @Override 820 public void run() { 821 // Then get the list of running users. 822 final int[] runningUsers; 823 try { 824 runningUsers = ActivityManagerNative.getDefault().getRunningUserIds(); 825 } catch (RemoteException e) { 826 Log.w(LOG_TAG, "Unable to access ActivityManagerNative"); 827 return; 828 } 829 // Then re-calculate the effective restrictions and apply, only for running users. 830 // It's okay if a new user has started after the getRunningUserIds() call, 831 // because we'll do the same thing (re-calculate the restrictions and apply) 832 // when we start a user. 833 // TODO: "Apply restrictions upon user start hasn't been implemented. Implement it. 834 synchronized (mRestrictionsLock) { 835 for (int i = 0; i < runningUsers.length; i++) { 836 updateUserRestrictionsInternalLR(null, runningUsers[i]); 837 } 838 } 839 } 840 }; 841 mHandler.post(r); 842 } 843 844 /** 845 * Check if we've hit the limit of how many users can be created. 846 */ 847 private boolean isUserLimitReached() { 848 int count; 849 synchronized (mUsersLock) { 850 count = getAliveUsersExcludingGuestsCountLU(); 851 } 852 return count >= UserManager.getMaxSupportedUsers(); 853 } 854 855 @Override 856 public boolean canAddMoreManagedProfiles(int userId, boolean allowedToRemoveOne) { 857 checkManageUsersPermission("check if more managed profiles can be added."); 858 if (ActivityManager.isLowRamDeviceStatic()) { 859 return false; 860 } 861 if (!mContext.getPackageManager().hasSystemFeature( 862 PackageManager.FEATURE_MANAGED_USERS)) { 863 return false; 864 } 865 // Limit number of managed profiles that can be created 866 final int managedProfilesCount = getProfiles(userId, true).size() - 1; 867 final int profilesRemovedCount = managedProfilesCount > 0 && allowedToRemoveOne ? 1 : 0; 868 if (managedProfilesCount - profilesRemovedCount >= MAX_MANAGED_PROFILES) { 869 return false; 870 } 871 synchronized(mUsersLock) { 872 UserInfo userInfo = getUserInfoLU(userId); 873 if (!userInfo.canHaveProfile()) { 874 return false; 875 } 876 int usersCountAfterRemoving = getAliveUsersExcludingGuestsCountLU() 877 - profilesRemovedCount; 878 // We allow creating a managed profile in the special case where there is only one user. 879 return usersCountAfterRemoving == 1 880 || usersCountAfterRemoving < UserManager.getMaxSupportedUsers(); 881 } 882 } 883 884 private int getAliveUsersExcludingGuestsCountLU() { 885 int aliveUserCount = 0; 886 final int totalUserCount = mUsers.size(); 887 // Skip over users being removed 888 for (int i = 0; i < totalUserCount; i++) { 889 UserInfo user = mUsers.valueAt(i); 890 if (!mRemovingUserIds.get(user.id) 891 && !user.isGuest() && !user.partial) { 892 aliveUserCount++; 893 } 894 } 895 return aliveUserCount; 896 } 897 898 /** 899 * Enforces that only the system UID or root's UID or apps that have the 900 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 901 * permission can make certain calls to the UserManager. 902 * 903 * @param message used as message if SecurityException is thrown 904 * @throws SecurityException if the caller is not system or root 905 */ 906 private static final void checkManageUsersPermission(String message) { 907 final int uid = Binder.getCallingUid(); 908 if (uid != Process.SYSTEM_UID && uid != 0 909 && ActivityManager.checkComponentPermission( 910 android.Manifest.permission.MANAGE_USERS, 911 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 912 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 913 } 914 } 915 916 private static void checkSystemOrRoot(String message) { 917 final int uid = Binder.getCallingUid(); 918 if (uid != Process.SYSTEM_UID && uid != 0) { 919 throw new SecurityException("Only system may call: " + message); 920 } 921 } 922 923 private void writeBitmapLP(UserInfo info, Bitmap bitmap) { 924 try { 925 File dir = new File(mUsersDir, Integer.toString(info.id)); 926 File file = new File(dir, USER_PHOTO_FILENAME); 927 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 928 if (!dir.exists()) { 929 dir.mkdir(); 930 FileUtils.setPermissions( 931 dir.getPath(), 932 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 933 -1, -1); 934 } 935 FileOutputStream os; 936 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 937 && tmp.renameTo(file)) { 938 info.iconPath = file.getAbsolutePath(); 939 } 940 try { 941 os.close(); 942 } catch (IOException ioe) { 943 // What the ... ! 944 } 945 tmp.delete(); 946 } catch (FileNotFoundException e) { 947 Slog.w(LOG_TAG, "Error setting photo for user ", e); 948 } 949 } 950 951 /** 952 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 953 * cache it elsewhere. 954 * @return the array of user ids. 955 */ 956 public int[] getUserIds() { 957 synchronized (mUsersLock) { 958 return mUserIds; 959 } 960 } 961 962 private void readUserListLILP() { 963 if (!mUserListFile.exists()) { 964 fallbackToSingleUserLILP(); 965 return; 966 } 967 FileInputStream fis = null; 968 AtomicFile userListFile = new AtomicFile(mUserListFile); 969 try { 970 fis = userListFile.openRead(); 971 XmlPullParser parser = Xml.newPullParser(); 972 parser.setInput(fis, StandardCharsets.UTF_8.name()); 973 int type; 974 while ((type = parser.next()) != XmlPullParser.START_TAG 975 && type != XmlPullParser.END_DOCUMENT) { 976 ; 977 } 978 979 if (type != XmlPullParser.START_TAG) { 980 Slog.e(LOG_TAG, "Unable to read user list"); 981 fallbackToSingleUserLILP(); 982 return; 983 } 984 985 mNextSerialNumber = -1; 986 if (parser.getName().equals(TAG_USERS)) { 987 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 988 if (lastSerialNumber != null) { 989 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 990 } 991 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 992 if (versionNumber != null) { 993 mUserVersion = Integer.parseInt(versionNumber); 994 } 995 } 996 997 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 998 if (type == XmlPullParser.START_TAG) { 999 final String name = parser.getName(); 1000 if (name.equals(TAG_USER)) { 1001 String id = parser.getAttributeValue(null, ATTR_ID); 1002 UserInfo user = readUserLILP(Integer.parseInt(id)); 1003 1004 if (user != null) { 1005 synchronized (mUsersLock) { 1006 mUsers.put(user.id, user); 1007 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 1008 mNextSerialNumber = user.id + 1; 1009 } 1010 } 1011 } 1012 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 1013 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1014 && type != XmlPullParser.END_TAG) { 1015 if (type == XmlPullParser.START_TAG) { 1016 if (parser.getName().equals(TAG_RESTRICTIONS)) { 1017 UserRestrictionsUtils 1018 .readRestrictions(parser, mGuestRestrictions); 1019 } 1020 break; 1021 } 1022 } 1023 } 1024 } 1025 } 1026 updateUserIds(); 1027 upgradeIfNecessaryLILP(); 1028 } catch (IOException ioe) { 1029 fallbackToSingleUserLILP(); 1030 } catch (XmlPullParserException pe) { 1031 fallbackToSingleUserLILP(); 1032 } finally { 1033 if (fis != null) { 1034 try { 1035 fis.close(); 1036 } catch (IOException e) { 1037 } 1038 } 1039 } 1040 } 1041 1042 /** 1043 * Upgrade steps between versions, either for fixing bugs or changing the data format. 1044 */ 1045 private void upgradeIfNecessaryLILP() { 1046 int userVersion = mUserVersion; 1047 if (userVersion < 1) { 1048 // Assign a proper name for the owner, if not initialized correctly before 1049 UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM); 1050 if ("Primary".equals(user.name)) { 1051 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 1052 scheduleWriteUserLP(user); 1053 } 1054 userVersion = 1; 1055 } 1056 1057 if (userVersion < 2) { 1058 // Owner should be marked as initialized 1059 UserInfo user = getUserInfoNoChecks(UserHandle.USER_SYSTEM); 1060 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 1061 user.flags |= UserInfo.FLAG_INITIALIZED; 1062 scheduleWriteUserLP(user); 1063 } 1064 userVersion = 2; 1065 } 1066 1067 1068 if (userVersion < 4) { 1069 userVersion = 4; 1070 } 1071 1072 if (userVersion < 5) { 1073 initDefaultGuestRestrictions(); 1074 userVersion = 5; 1075 } 1076 1077 if (userVersion < 6) { 1078 final boolean splitSystemUser = UserManager.isSplitSystemUser(); 1079 synchronized (mUsersLock) { 1080 for (int i = 0; i < mUsers.size(); i++) { 1081 UserInfo user = mUsers.valueAt(i); 1082 // In non-split mode, only user 0 can have restricted profiles 1083 if (!splitSystemUser && user.isRestricted() 1084 && (user.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID)) { 1085 user.restrictedProfileParentId = UserHandle.USER_SYSTEM; 1086 scheduleWriteUserLP(user); 1087 } 1088 } 1089 } 1090 userVersion = 6; 1091 } 1092 1093 if (userVersion < USER_VERSION) { 1094 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 1095 + USER_VERSION); 1096 } else { 1097 mUserVersion = userVersion; 1098 writeUserListLILP(); 1099 } 1100 } 1101 1102 private void fallbackToSingleUserLILP() { 1103 int flags = UserInfo.FLAG_INITIALIZED; 1104 // In split system user mode, the admin and primary flags are assigned to the first human 1105 // user. 1106 if (!UserManager.isSplitSystemUser()) { 1107 flags |= UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY; 1108 } 1109 // Create the system user 1110 UserInfo system = new UserInfo(UserHandle.USER_SYSTEM, 1111 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 1112 flags); 1113 synchronized (mUsersLock) { 1114 mUsers.put(system.id, system); 1115 } 1116 mNextSerialNumber = MIN_USER_ID; 1117 mUserVersion = USER_VERSION; 1118 1119 Bundle restrictions = new Bundle(); 1120 synchronized (mRestrictionsLock) { 1121 mBaseUserRestrictions.append(UserHandle.USER_SYSTEM, restrictions); 1122 } 1123 1124 updateUserIds(); 1125 initDefaultGuestRestrictions(); 1126 1127 writeUserListLILP(); 1128 writeUserLP(system); 1129 } 1130 1131 private void scheduleWriteUserLP(UserInfo userInfo) { 1132 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 1133 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 1134 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 1135 } 1136 } 1137 1138 /* 1139 * Writes the user file in this format: 1140 * 1141 * <user flags="20039023" id="0"> 1142 * <name>Primary</name> 1143 * </user> 1144 */ 1145 private void writeUserLP(UserInfo userInfo) { 1146 FileOutputStream fos = null; 1147 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 1148 try { 1149 fos = userFile.startWrite(); 1150 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1151 1152 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1153 final XmlSerializer serializer = new FastXmlSerializer(); 1154 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1155 serializer.startDocument(null, true); 1156 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1157 1158 serializer.startTag(null, TAG_USER); 1159 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 1160 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 1161 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 1162 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 1163 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 1164 Long.toString(userInfo.lastLoggedInTime)); 1165 if (userInfo.iconPath != null) { 1166 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 1167 } 1168 if (userInfo.partial) { 1169 serializer.attribute(null, ATTR_PARTIAL, "true"); 1170 } 1171 if (userInfo.guestToRemove) { 1172 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 1173 } 1174 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 1175 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 1176 Integer.toString(userInfo.profileGroupId)); 1177 } 1178 if (userInfo.restrictedProfileParentId != UserInfo.NO_PROFILE_GROUP_ID) { 1179 serializer.attribute(null, ATTR_RESTRICTED_PROFILE_PARENT_ID, 1180 Integer.toString(userInfo.restrictedProfileParentId)); 1181 } 1182 serializer.startTag(null, TAG_NAME); 1183 serializer.text(userInfo.name); 1184 serializer.endTag(null, TAG_NAME); 1185 Bundle restrictions; 1186 synchronized (mRestrictionsLock) { 1187 restrictions = mBaseUserRestrictions.get(userInfo.id); 1188 } 1189 if (restrictions != null) { 1190 UserRestrictionsUtils 1191 .writeRestrictions(serializer, restrictions, TAG_RESTRICTIONS); 1192 } 1193 serializer.endTag(null, TAG_USER); 1194 1195 serializer.endDocument(); 1196 userFile.finishWrite(fos); 1197 } catch (Exception ioe) { 1198 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 1199 userFile.failWrite(fos); 1200 } 1201 } 1202 1203 /* 1204 * Writes the user list file in this format: 1205 * 1206 * <users nextSerialNumber="3"> 1207 * <user id="0"></user> 1208 * <user id="2"></user> 1209 * </users> 1210 */ 1211 private void writeUserListLILP() { 1212 // TODO Investigate removing a dependency on mInstallLock 1213 FileOutputStream fos = null; 1214 AtomicFile userListFile = new AtomicFile(mUserListFile); 1215 try { 1216 fos = userListFile.startWrite(); 1217 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1218 1219 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1220 final XmlSerializer serializer = new FastXmlSerializer(); 1221 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1222 serializer.startDocument(null, true); 1223 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1224 1225 serializer.startTag(null, TAG_USERS); 1226 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 1227 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 1228 1229 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 1230 UserRestrictionsUtils 1231 .writeRestrictions(serializer, mGuestRestrictions, TAG_RESTRICTIONS); 1232 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 1233 int[] userIdsToWrite; 1234 synchronized (mUsersLock) { 1235 userIdsToWrite = new int[mUsers.size()]; 1236 for (int i = 0; i < userIdsToWrite.length; i++) { 1237 UserInfo user = mUsers.valueAt(i); 1238 userIdsToWrite[i] = user.id; 1239 } 1240 } 1241 for (int id : userIdsToWrite) { 1242 serializer.startTag(null, TAG_USER); 1243 serializer.attribute(null, ATTR_ID, Integer.toString(id)); 1244 serializer.endTag(null, TAG_USER); 1245 } 1246 1247 serializer.endTag(null, TAG_USERS); 1248 1249 serializer.endDocument(); 1250 userListFile.finishWrite(fos); 1251 } catch (Exception e) { 1252 userListFile.failWrite(fos); 1253 Slog.e(LOG_TAG, "Error writing user list"); 1254 } 1255 } 1256 1257 private UserInfo readUserLILP(int id) { 1258 int flags = 0; 1259 int serialNumber = id; 1260 String name = null; 1261 String iconPath = null; 1262 long creationTime = 0L; 1263 long lastLoggedInTime = 0L; 1264 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 1265 int restrictedProfileParentId = UserInfo.NO_PROFILE_GROUP_ID; 1266 boolean partial = false; 1267 boolean guestToRemove = false; 1268 Bundle restrictions = new Bundle(); 1269 1270 FileInputStream fis = null; 1271 try { 1272 AtomicFile userFile = 1273 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 1274 fis = userFile.openRead(); 1275 XmlPullParser parser = Xml.newPullParser(); 1276 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1277 int type; 1278 while ((type = parser.next()) != XmlPullParser.START_TAG 1279 && type != XmlPullParser.END_DOCUMENT) { 1280 ; 1281 } 1282 1283 if (type != XmlPullParser.START_TAG) { 1284 Slog.e(LOG_TAG, "Unable to read user " + id); 1285 return null; 1286 } 1287 1288 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 1289 int storedId = readIntAttribute(parser, ATTR_ID, -1); 1290 if (storedId != id) { 1291 Slog.e(LOG_TAG, "User id does not match the file name"); 1292 return null; 1293 } 1294 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 1295 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 1296 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 1297 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 1298 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 1299 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 1300 UserInfo.NO_PROFILE_GROUP_ID); 1301 restrictedProfileParentId = readIntAttribute(parser, 1302 ATTR_RESTRICTED_PROFILE_PARENT_ID, UserInfo.NO_PROFILE_GROUP_ID); 1303 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 1304 if ("true".equals(valueString)) { 1305 partial = true; 1306 } 1307 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 1308 if ("true".equals(valueString)) { 1309 guestToRemove = true; 1310 } 1311 1312 int outerDepth = parser.getDepth(); 1313 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 1314 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1315 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1316 continue; 1317 } 1318 String tag = parser.getName(); 1319 if (TAG_NAME.equals(tag)) { 1320 type = parser.next(); 1321 if (type == XmlPullParser.TEXT) { 1322 name = parser.getText(); 1323 } 1324 } else if (TAG_RESTRICTIONS.equals(tag)) { 1325 UserRestrictionsUtils.readRestrictions(parser, restrictions); 1326 } 1327 } 1328 } 1329 1330 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1331 userInfo.serialNumber = serialNumber; 1332 userInfo.creationTime = creationTime; 1333 userInfo.lastLoggedInTime = lastLoggedInTime; 1334 userInfo.partial = partial; 1335 userInfo.guestToRemove = guestToRemove; 1336 userInfo.profileGroupId = profileGroupId; 1337 userInfo.restrictedProfileParentId = restrictedProfileParentId; 1338 synchronized (mRestrictionsLock) { 1339 mBaseUserRestrictions.append(id, restrictions); 1340 } 1341 return userInfo; 1342 1343 } catch (IOException ioe) { 1344 } catch (XmlPullParserException pe) { 1345 } finally { 1346 if (fis != null) { 1347 try { 1348 fis.close(); 1349 } catch (IOException e) { 1350 } 1351 } 1352 } 1353 return null; 1354 } 1355 1356 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1357 String valueString = parser.getAttributeValue(null, attr); 1358 if (valueString == null) return defaultValue; 1359 try { 1360 return Integer.parseInt(valueString); 1361 } catch (NumberFormatException nfe) { 1362 return defaultValue; 1363 } 1364 } 1365 1366 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1367 String valueString = parser.getAttributeValue(null, attr); 1368 if (valueString == null) return defaultValue; 1369 try { 1370 return Long.parseLong(valueString); 1371 } catch (NumberFormatException nfe) { 1372 return defaultValue; 1373 } 1374 } 1375 1376 private boolean isPackageInstalled(String pkg, int userId) { 1377 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1378 PackageManager.GET_UNINSTALLED_PACKAGES, 1379 userId); 1380 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1381 return false; 1382 } 1383 return true; 1384 } 1385 1386 /** 1387 * Removes all the restrictions files (res_<packagename>) for a given user. 1388 * Does not do any permissions checking. 1389 */ 1390 private void cleanAppRestrictions(int userId) { 1391 synchronized (mPackagesLock) { 1392 File dir = Environment.getUserSystemDirectory(userId); 1393 String[] files = dir.list(); 1394 if (files == null) return; 1395 for (String fileName : files) { 1396 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1397 File resFile = new File(dir, fileName); 1398 if (resFile.exists()) { 1399 resFile.delete(); 1400 } 1401 } 1402 } 1403 } 1404 } 1405 1406 /** 1407 * Removes the app restrictions file for a specific package and user id, if it exists. 1408 */ 1409 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1410 synchronized (mPackagesLock) { 1411 File dir = Environment.getUserSystemDirectory(userId); 1412 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1413 if (resFile.exists()) { 1414 resFile.delete(); 1415 } 1416 } 1417 } 1418 1419 @Override 1420 public UserInfo createProfileForUser(String name, int flags, int userId) { 1421 checkManageUsersPermission("Only the system can create users"); 1422 return createUserInternal(name, flags, userId); 1423 } 1424 1425 @Override 1426 public UserInfo createUser(String name, int flags) { 1427 checkManageUsersPermission("Only the system can create users"); 1428 return createUserInternal(name, flags, UserHandle.USER_NULL); 1429 } 1430 1431 private UserInfo createUserInternal(String name, int flags, int parentId) { 1432 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1433 UserManager.DISALLOW_ADD_USER, false)) { 1434 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1435 return null; 1436 } 1437 if (ActivityManager.isLowRamDeviceStatic()) { 1438 return null; 1439 } 1440 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1441 final boolean isManagedProfile = (flags & UserInfo.FLAG_MANAGED_PROFILE) != 0; 1442 final boolean isRestricted = (flags & UserInfo.FLAG_RESTRICTED) != 0; 1443 final long ident = Binder.clearCallingIdentity(); 1444 UserInfo userInfo = null; 1445 final int userId; 1446 try { 1447 synchronized (mInstallLock) { 1448 synchronized (mPackagesLock) { 1449 UserInfo parent = null; 1450 if (parentId != UserHandle.USER_NULL) { 1451 synchronized (mUsersLock) { 1452 parent = getUserInfoLU(parentId); 1453 } 1454 if (parent == null) return null; 1455 } 1456 if (isManagedProfile && !canAddMoreManagedProfiles(parentId, false)) { 1457 Log.e(LOG_TAG, "Cannot add more managed profiles for user " + parentId); 1458 return null; 1459 } 1460 if (!isGuest && !isManagedProfile && isUserLimitReached()) { 1461 // If we're not adding a guest user or a managed profile and the limit has 1462 // been reached, cannot add a user. 1463 return null; 1464 } 1465 // If we're adding a guest and there already exists one, bail. 1466 if (isGuest && findCurrentGuestUser() != null) { 1467 return null; 1468 } 1469 // In legacy mode, restricted profile's parent can only be the owner user 1470 if (isRestricted && !UserManager.isSplitSystemUser() 1471 && (parentId != UserHandle.USER_SYSTEM)) { 1472 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1473 return null; 1474 } 1475 if (isRestricted && UserManager.isSplitSystemUser()) { 1476 if (parent == null) { 1477 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be " 1478 + "specified"); 1479 return null; 1480 } 1481 if (!parent.canHaveProfile()) { 1482 Log.w(LOG_TAG, "Cannot add restricted profile - profiles cannot be " 1483 + "created for the specified parent user id " + parentId); 1484 return null; 1485 } 1486 } 1487 // In split system user mode, we assign the first human user the primary flag. 1488 // And if there is no device owner, we also assign the admin flag to primary 1489 // user. 1490 if (UserManager.isSplitSystemUser() 1491 && !isGuest && !isManagedProfile && getPrimaryUser() == null) { 1492 flags |= UserInfo.FLAG_PRIMARY; 1493 DevicePolicyManager devicePolicyManager = (DevicePolicyManager) 1494 mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); 1495 if (devicePolicyManager == null 1496 || devicePolicyManager.getDeviceOwner() == null) { 1497 flags |= UserInfo.FLAG_ADMIN; 1498 } 1499 } 1500 userId = getNextAvailableId(); 1501 userInfo = new UserInfo(userId, name, null, flags); 1502 userInfo.serialNumber = mNextSerialNumber++; 1503 long now = System.currentTimeMillis(); 1504 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1505 userInfo.partial = true; 1506 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1507 mUsers.put(userId, userInfo); 1508 writeUserListLILP(); 1509 if (parent != null) { 1510 if (isManagedProfile) { 1511 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1512 parent.profileGroupId = parent.id; 1513 scheduleWriteUserLP(parent); 1514 } 1515 userInfo.profileGroupId = parent.profileGroupId; 1516 } else if (isRestricted) { 1517 if (!parent.canHaveProfile()) { 1518 Log.w(LOG_TAG, "Cannot add restricted profile - parent user must be owner"); 1519 } 1520 if (parent.restrictedProfileParentId == UserInfo.NO_PROFILE_GROUP_ID) { 1521 parent.restrictedProfileParentId = parent.id; 1522 scheduleWriteUserLP(parent); 1523 } 1524 userInfo.restrictedProfileParentId = parent.restrictedProfileParentId; 1525 } 1526 } 1527 final StorageManager storage = mContext.getSystemService(StorageManager.class); 1528 for (VolumeInfo vol : storage.getWritablePrivateVolumes()) { 1529 final String volumeUuid = vol.getFsUuid(); 1530 try { 1531 final File userDir = Environment.getDataUserDirectory(volumeUuid, 1532 userId); 1533 prepareUserDirectory(mContext, volumeUuid, userId); 1534 enforceSerialNumber(userDir, userInfo.serialNumber); 1535 } catch (IOException e) { 1536 Log.wtf(LOG_TAG, "Failed to create user directory on " + volumeUuid, e); 1537 } 1538 } 1539 mPm.createNewUserLILPw(userId); 1540 userInfo.partial = false; 1541 scheduleWriteUserLP(userInfo); 1542 updateUserIds(); 1543 Bundle restrictions = new Bundle(); 1544 synchronized (mRestrictionsLock) { 1545 mBaseUserRestrictions.append(userId, restrictions); 1546 } 1547 } 1548 } 1549 mPm.newUserCreated(userId); 1550 if (userInfo != null) { 1551 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1552 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1553 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1554 android.Manifest.permission.MANAGE_USERS); 1555 } 1556 } finally { 1557 Binder.restoreCallingIdentity(ident); 1558 } 1559 return userInfo; 1560 } 1561 1562 /** 1563 * @hide 1564 */ 1565 public UserInfo createRestrictedProfile(String name, int parentUserId) { 1566 checkManageUsersPermission("setupRestrictedProfile"); 1567 final UserInfo user = createProfileForUser(name, UserInfo.FLAG_RESTRICTED, parentUserId); 1568 if (user == null) { 1569 return null; 1570 } 1571 setUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS, true, user.id); 1572 // Change the setting before applying the DISALLOW_SHARE_LOCATION restriction, otherwise 1573 // the putIntForUser() will fail. 1574 android.provider.Settings.Secure.putIntForUser(mContext.getContentResolver(), 1575 android.provider.Settings.Secure.LOCATION_MODE, 1576 android.provider.Settings.Secure.LOCATION_MODE_OFF, user.id); 1577 setUserRestriction(UserManager.DISALLOW_SHARE_LOCATION, true, user.id); 1578 return user; 1579 } 1580 1581 /** 1582 * Find the current guest user. If the Guest user is partial, 1583 * then do not include it in the results as it is about to die. 1584 */ 1585 private UserInfo findCurrentGuestUser() { 1586 synchronized (mUsersLock) { 1587 final int size = mUsers.size(); 1588 for (int i = 0; i < size; i++) { 1589 final UserInfo user = mUsers.valueAt(i); 1590 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1591 return user; 1592 } 1593 } 1594 } 1595 return null; 1596 } 1597 1598 /** 1599 * Mark this guest user for deletion to allow us to create another guest 1600 * and switch to that user before actually removing this guest. 1601 * @param userHandle the userid of the current guest 1602 * @return whether the user could be marked for deletion 1603 */ 1604 public boolean markGuestForDeletion(int userHandle) { 1605 checkManageUsersPermission("Only the system can remove users"); 1606 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1607 UserManager.DISALLOW_REMOVE_USER, false)) { 1608 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1609 return false; 1610 } 1611 1612 long ident = Binder.clearCallingIdentity(); 1613 try { 1614 final UserInfo user; 1615 synchronized (mPackagesLock) { 1616 synchronized (mUsersLock) { 1617 user = mUsers.get(userHandle); 1618 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1619 return false; 1620 } 1621 } 1622 if (!user.isGuest()) { 1623 return false; 1624 } 1625 // We set this to a guest user that is to be removed. This is a temporary state 1626 // where we are allowed to add new Guest users, even if this one is still not 1627 // removed. This user will still show up in getUserInfo() calls. 1628 // If we don't get around to removing this Guest user, it will be purged on next 1629 // startup. 1630 user.guestToRemove = true; 1631 // Mark it as disabled, so that it isn't returned any more when 1632 // profiles are queried. 1633 user.flags |= UserInfo.FLAG_DISABLED; 1634 writeUserLP(user); 1635 } 1636 } finally { 1637 Binder.restoreCallingIdentity(ident); 1638 } 1639 return true; 1640 } 1641 1642 /** 1643 * Removes a user and all data directories created for that user. This method should be called 1644 * after the user's processes have been terminated. 1645 * @param userHandle the user's id 1646 */ 1647 public boolean removeUser(int userHandle) { 1648 checkManageUsersPermission("Only the system can remove users"); 1649 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1650 UserManager.DISALLOW_REMOVE_USER, false)) { 1651 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1652 return false; 1653 } 1654 1655 long ident = Binder.clearCallingIdentity(); 1656 try { 1657 final UserInfo user; 1658 int currentUser = ActivityManager.getCurrentUser(); 1659 if (currentUser == userHandle) { 1660 Log.w(LOG_TAG, "Current user cannot be removed"); 1661 return false; 1662 } 1663 synchronized (mPackagesLock) { 1664 synchronized (mUsersLock) { 1665 user = mUsers.get(userHandle); 1666 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1667 return false; 1668 } 1669 1670 // We remember deleted user IDs to prevent them from being 1671 // reused during the current boot; they can still be reused 1672 // after a reboot. 1673 mRemovingUserIds.put(userHandle, true); 1674 } 1675 1676 try { 1677 mAppOpsService.removeUser(userHandle); 1678 } catch (RemoteException e) { 1679 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1680 } 1681 // Set this to a partially created user, so that the user will be purged 1682 // on next startup, in case the runtime stops now before stopping and 1683 // removing the user completely. 1684 user.partial = true; 1685 // Mark it as disabled, so that it isn't returned any more when 1686 // profiles are queried. 1687 user.flags |= UserInfo.FLAG_DISABLED; 1688 writeUserLP(user); 1689 } 1690 1691 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1692 && user.isManagedProfile()) { 1693 // Send broadcast to notify system that the user removed was a 1694 // managed user. 1695 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1696 } 1697 1698 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1699 int res; 1700 try { 1701 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1702 new IStopUserCallback.Stub() { 1703 @Override 1704 public void userStopped(int userId) { 1705 finishRemoveUser(userId); 1706 } 1707 @Override 1708 public void userStopAborted(int userId) { 1709 } 1710 }); 1711 } catch (RemoteException e) { 1712 return false; 1713 } 1714 return res == ActivityManager.USER_OP_SUCCESS; 1715 } finally { 1716 Binder.restoreCallingIdentity(ident); 1717 } 1718 } 1719 1720 void finishRemoveUser(final int userHandle) { 1721 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1722 // Let other services shutdown any activity and clean up their state before completely 1723 // wiping the user's system directory and removing from the user list 1724 long ident = Binder.clearCallingIdentity(); 1725 try { 1726 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1727 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1728 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1729 android.Manifest.permission.MANAGE_USERS, 1730 1731 new BroadcastReceiver() { 1732 @Override 1733 public void onReceive(Context context, Intent intent) { 1734 if (DBG) { 1735 Slog.i(LOG_TAG, 1736 "USER_REMOVED broadcast sent, cleaning up user data " 1737 + userHandle); 1738 } 1739 new Thread() { 1740 public void run() { 1741 // Clean up any ActivityManager state 1742 LocalServices.getService(ActivityManagerInternal.class) 1743 .onUserRemoved(userHandle); 1744 synchronized (mInstallLock) { 1745 synchronized (mPackagesLock) { 1746 removeUserStateLILP(userHandle); 1747 } 1748 } 1749 } 1750 }.start(); 1751 } 1752 }, 1753 1754 null, Activity.RESULT_OK, null, null); 1755 } finally { 1756 Binder.restoreCallingIdentity(ident); 1757 } 1758 } 1759 1760 private void removeUserStateLILP(final int userHandle) { 1761 mContext.getSystemService(StorageManager.class) 1762 .deleteUserKey(userHandle); 1763 // Cleanup package manager settings 1764 mPm.cleanUpUserLILPw(this, userHandle); 1765 1766 // Remove this user from the list 1767 synchronized (mUsersLock) { 1768 mUsers.remove(userHandle); 1769 } 1770 // Remove user file 1771 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1772 userFile.delete(); 1773 // Update the user list 1774 writeUserListLILP(); 1775 updateUserIds(); 1776 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1777 } 1778 1779 private void removeDirectoryRecursive(File parent) { 1780 if (parent.isDirectory()) { 1781 String[] files = parent.list(); 1782 for (String filename : files) { 1783 File child = new File(parent, filename); 1784 removeDirectoryRecursive(child); 1785 } 1786 } 1787 parent.delete(); 1788 } 1789 1790 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1791 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1792 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1793 Intent.FLAG_RECEIVER_FOREGROUND); 1794 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1795 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1796 } 1797 1798 @Override 1799 public Bundle getApplicationRestrictions(String packageName) { 1800 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1801 } 1802 1803 @Override 1804 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1805 if (UserHandle.getCallingUserId() != userId 1806 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1807 checkManageUsersPermission("get application restrictions for other users/apps"); 1808 } 1809 synchronized (mPackagesLock) { 1810 // Read the restrictions from XML 1811 return readApplicationRestrictionsLP(packageName, userId); 1812 } 1813 } 1814 1815 @Override 1816 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1817 int userId) { 1818 checkManageUsersPermission("set application restrictions"); 1819 synchronized (mPackagesLock) { 1820 if (restrictions == null || restrictions.isEmpty()) { 1821 cleanAppRestrictionsForPackage(packageName, userId); 1822 } else { 1823 // Write the restrictions to XML 1824 writeApplicationRestrictionsLP(packageName, restrictions, userId); 1825 } 1826 } 1827 1828 if (isPackageInstalled(packageName, userId)) { 1829 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1830 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1831 changeIntent.setPackage(packageName); 1832 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1833 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1834 } 1835 } 1836 1837 private void unhideAllInstalledAppsForUser(final int userHandle) { 1838 mHandler.post(new Runnable() { 1839 @Override 1840 public void run() { 1841 List<ApplicationInfo> apps = 1842 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1843 userHandle).getList(); 1844 final long ident = Binder.clearCallingIdentity(); 1845 try { 1846 for (ApplicationInfo appInfo : apps) { 1847 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1848 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1849 != 0) { 1850 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1851 userHandle); 1852 } 1853 } 1854 } finally { 1855 Binder.restoreCallingIdentity(ident); 1856 } 1857 } 1858 }); 1859 } 1860 private int getUidForPackage(String packageName) { 1861 long ident = Binder.clearCallingIdentity(); 1862 try { 1863 return mContext.getPackageManager().getApplicationInfo(packageName, 1864 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1865 } catch (NameNotFoundException nnfe) { 1866 return -1; 1867 } finally { 1868 Binder.restoreCallingIdentity(ident); 1869 } 1870 } 1871 1872 private Bundle readApplicationRestrictionsLP(String packageName, int userId) { 1873 AtomicFile restrictionsFile = 1874 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1875 packageToRestrictionsFileName(packageName))); 1876 return readApplicationRestrictionsLP(restrictionsFile); 1877 } 1878 1879 @VisibleForTesting 1880 static Bundle readApplicationRestrictionsLP(AtomicFile restrictionsFile) { 1881 final Bundle restrictions = new Bundle(); 1882 final ArrayList<String> values = new ArrayList<>(); 1883 if (!restrictionsFile.getBaseFile().exists()) { 1884 return restrictions; 1885 } 1886 1887 FileInputStream fis = null; 1888 try { 1889 fis = restrictionsFile.openRead(); 1890 XmlPullParser parser = Xml.newPullParser(); 1891 parser.setInput(fis, StandardCharsets.UTF_8.name()); 1892 XmlUtils.nextElement(parser); 1893 if (parser.getEventType() != XmlPullParser.START_TAG) { 1894 Slog.e(LOG_TAG, "Unable to read restrictions file " 1895 + restrictionsFile.getBaseFile()); 1896 return restrictions; 1897 } 1898 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1899 readEntry(restrictions, values, parser); 1900 } 1901 } catch (IOException|XmlPullParserException e) { 1902 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1903 } finally { 1904 IoUtils.closeQuietly(fis); 1905 } 1906 return restrictions; 1907 } 1908 1909 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1910 XmlPullParser parser) throws XmlPullParserException, IOException { 1911 int type = parser.getEventType(); 1912 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1913 String key = parser.getAttributeValue(null, ATTR_KEY); 1914 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1915 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1916 if (multiple != null) { 1917 values.clear(); 1918 int count = Integer.parseInt(multiple); 1919 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1920 if (type == XmlPullParser.START_TAG 1921 && parser.getName().equals(TAG_VALUE)) { 1922 values.add(parser.nextText().trim()); 1923 count--; 1924 } 1925 } 1926 String [] valueStrings = new String[values.size()]; 1927 values.toArray(valueStrings); 1928 restrictions.putStringArray(key, valueStrings); 1929 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1930 restrictions.putBundle(key, readBundleEntry(parser, values)); 1931 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1932 final int outerDepth = parser.getDepth(); 1933 ArrayList<Bundle> bundleList = new ArrayList<>(); 1934 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1935 Bundle childBundle = readBundleEntry(parser, values); 1936 bundleList.add(childBundle); 1937 } 1938 restrictions.putParcelableArray(key, 1939 bundleList.toArray(new Bundle[bundleList.size()])); 1940 } else { 1941 String value = parser.nextText().trim(); 1942 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1943 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1944 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1945 restrictions.putInt(key, Integer.parseInt(value)); 1946 } else { 1947 restrictions.putString(key, value); 1948 } 1949 } 1950 } 1951 } 1952 1953 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1954 throws IOException, XmlPullParserException { 1955 Bundle childBundle = new Bundle(); 1956 final int outerDepth = parser.getDepth(); 1957 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1958 readEntry(childBundle, values, parser); 1959 } 1960 return childBundle; 1961 } 1962 1963 private void writeApplicationRestrictionsLP(String packageName, 1964 Bundle restrictions, int userId) { 1965 AtomicFile restrictionsFile = new AtomicFile( 1966 new File(Environment.getUserSystemDirectory(userId), 1967 packageToRestrictionsFileName(packageName))); 1968 writeApplicationRestrictionsLP(restrictions, restrictionsFile); 1969 } 1970 1971 @VisibleForTesting 1972 static void writeApplicationRestrictionsLP(Bundle restrictions, AtomicFile restrictionsFile) { 1973 FileOutputStream fos = null; 1974 try { 1975 fos = restrictionsFile.startWrite(); 1976 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1977 1978 final XmlSerializer serializer = new FastXmlSerializer(); 1979 serializer.setOutput(bos, StandardCharsets.UTF_8.name()); 1980 serializer.startDocument(null, true); 1981 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1982 1983 serializer.startTag(null, TAG_RESTRICTIONS); 1984 writeBundle(restrictions, serializer); 1985 serializer.endTag(null, TAG_RESTRICTIONS); 1986 1987 serializer.endDocument(); 1988 restrictionsFile.finishWrite(fos); 1989 } catch (Exception e) { 1990 restrictionsFile.failWrite(fos); 1991 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 1992 } 1993 } 1994 1995 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1996 throws IOException { 1997 for (String key : restrictions.keySet()) { 1998 Object value = restrictions.get(key); 1999 serializer.startTag(null, TAG_ENTRY); 2000 serializer.attribute(null, ATTR_KEY, key); 2001 2002 if (value instanceof Boolean) { 2003 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 2004 serializer.text(value.toString()); 2005 } else if (value instanceof Integer) { 2006 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 2007 serializer.text(value.toString()); 2008 } else if (value == null || value instanceof String) { 2009 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 2010 serializer.text(value != null ? (String) value : ""); 2011 } else if (value instanceof Bundle) { 2012 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 2013 writeBundle((Bundle) value, serializer); 2014 } else if (value instanceof Parcelable[]) { 2015 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 2016 Parcelable[] array = (Parcelable[]) value; 2017 for (Parcelable parcelable : array) { 2018 if (!(parcelable instanceof Bundle)) { 2019 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 2020 } 2021 serializer.startTag(null, TAG_ENTRY); 2022 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 2023 writeBundle((Bundle) parcelable, serializer); 2024 serializer.endTag(null, TAG_ENTRY); 2025 } 2026 } else { 2027 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 2028 String[] values = (String[]) value; 2029 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 2030 for (String choice : values) { 2031 serializer.startTag(null, TAG_VALUE); 2032 serializer.text(choice != null ? choice : ""); 2033 serializer.endTag(null, TAG_VALUE); 2034 } 2035 } 2036 serializer.endTag(null, TAG_ENTRY); 2037 } 2038 } 2039 2040 @Override 2041 public int getUserSerialNumber(int userHandle) { 2042 synchronized (mUsersLock) { 2043 if (!exists(userHandle)) return -1; 2044 return getUserInfoLU(userHandle).serialNumber; 2045 } 2046 } 2047 2048 @Override 2049 public int getUserHandle(int userSerialNumber) { 2050 synchronized (mUsersLock) { 2051 for (int userId : mUserIds) { 2052 UserInfo info = getUserInfoLU(userId); 2053 if (info != null && info.serialNumber == userSerialNumber) return userId; 2054 } 2055 // Not found 2056 return -1; 2057 } 2058 } 2059 2060 @Override 2061 public long getUserCreationTime(int userHandle) { 2062 int callingUserId = UserHandle.getCallingUserId(); 2063 UserInfo userInfo = null; 2064 synchronized (mUsersLock) { 2065 if (callingUserId == userHandle) { 2066 userInfo = getUserInfoLU(userHandle); 2067 } else { 2068 UserInfo parent = getProfileParentLU(userHandle); 2069 if (parent != null && parent.id == callingUserId) { 2070 userInfo = getUserInfoLU(userHandle); 2071 } 2072 } 2073 } 2074 if (userInfo == null) { 2075 throw new SecurityException("userHandle can only be the calling user or a managed " 2076 + "profile associated with this user"); 2077 } 2078 return userInfo.creationTime; 2079 } 2080 2081 /** 2082 * Caches the list of user ids in an array, adjusting the array size when necessary. 2083 */ 2084 private void updateUserIds() { 2085 int num = 0; 2086 synchronized (mUsersLock) { 2087 final int userSize = mUsers.size(); 2088 for (int i = 0; i < userSize; i++) { 2089 if (!mUsers.valueAt(i).partial) { 2090 num++; 2091 } 2092 } 2093 final int[] newUsers = new int[num]; 2094 int n = 0; 2095 for (int i = 0; i < userSize; i++) { 2096 if (!mUsers.valueAt(i).partial) { 2097 newUsers[n++] = mUsers.keyAt(i); 2098 } 2099 } 2100 mUserIds = newUsers; 2101 } 2102 } 2103 2104 /** 2105 * Make a note of the last started time of a user and do some cleanup. 2106 * @param userId the user that was just foregrounded 2107 */ 2108 public void onUserForeground(int userId) { 2109 synchronized (mPackagesLock) { 2110 UserInfo user = getUserInfoNoChecks(userId); 2111 long now = System.currentTimeMillis(); 2112 if (user == null || user.partial) { 2113 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 2114 return; 2115 } 2116 if (now > EPOCH_PLUS_30_YEARS) { 2117 user.lastLoggedInTime = now; 2118 scheduleWriteUserLP(user); 2119 } 2120 } 2121 } 2122 2123 /** 2124 * Returns the next available user id, filling in any holes in the ids. 2125 * TODO: May not be a good idea to recycle ids, in case it results in confusion 2126 * for data and battery stats collection, or unexpected cross-talk. 2127 * @return 2128 */ 2129 private int getNextAvailableId() { 2130 synchronized (mUsersLock) { 2131 int i = MIN_USER_ID; 2132 while (i < MAX_USER_ID) { 2133 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 2134 return i; 2135 } 2136 i++; 2137 } 2138 } 2139 throw new IllegalStateException("No user id available!"); 2140 } 2141 2142 private String packageToRestrictionsFileName(String packageName) { 2143 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 2144 } 2145 2146 /** 2147 * Create new {@code /data/user/[id]} directory and sets default 2148 * permissions. 2149 */ 2150 public static void prepareUserDirectory(Context context, String volumeUuid, int userId) { 2151 final StorageManager storage = context.getSystemService(StorageManager.class); 2152 final File userDir = Environment.getDataUserDirectory(volumeUuid, userId); 2153 storage.createNewUserDir(userId, userDir); 2154 } 2155 2156 /** 2157 * Enforce that serial number stored in user directory inode matches the 2158 * given expected value. Gracefully sets the serial number if currently 2159 * undefined. 2160 * 2161 * @throws IOException when problem extracting serial number, or serial 2162 * number is mismatched. 2163 */ 2164 public static void enforceSerialNumber(File file, int serialNumber) throws IOException { 2165 final int foundSerial = getSerialNumber(file); 2166 Slog.v(LOG_TAG, "Found " + file + " with serial number " + foundSerial); 2167 2168 if (foundSerial == -1) { 2169 Slog.d(LOG_TAG, "Serial number missing on " + file + "; assuming current is valid"); 2170 try { 2171 setSerialNumber(file, serialNumber); 2172 } catch (IOException e) { 2173 Slog.w(LOG_TAG, "Failed to set serial number on " + file, e); 2174 } 2175 2176 } else if (foundSerial != serialNumber) { 2177 throw new IOException("Found serial number " + foundSerial 2178 + " doesn't match expected " + serialNumber); 2179 } 2180 } 2181 2182 /** 2183 * Set serial number stored in user directory inode. 2184 * 2185 * @throws IOException if serial number was already set 2186 */ 2187 private static void setSerialNumber(File file, int serialNumber) 2188 throws IOException { 2189 try { 2190 final byte[] buf = Integer.toString(serialNumber).getBytes(StandardCharsets.UTF_8); 2191 Os.setxattr(file.getAbsolutePath(), XATTR_SERIAL, buf, OsConstants.XATTR_CREATE); 2192 } catch (ErrnoException e) { 2193 throw e.rethrowAsIOException(); 2194 } 2195 } 2196 2197 /** 2198 * Return serial number stored in user directory inode. 2199 * 2200 * @return parsed serial number, or -1 if not set 2201 */ 2202 private static int getSerialNumber(File file) throws IOException { 2203 try { 2204 final byte[] buf = new byte[256]; 2205 final int len = Os.getxattr(file.getAbsolutePath(), XATTR_SERIAL, buf); 2206 final String serial = new String(buf, 0, len); 2207 try { 2208 return Integer.parseInt(serial); 2209 } catch (NumberFormatException e) { 2210 throw new IOException("Bad serial number: " + serial); 2211 } 2212 } catch (ErrnoException e) { 2213 if (e.errno == OsConstants.ENODATA) { 2214 return -1; 2215 } else { 2216 throw e.rethrowAsIOException(); 2217 } 2218 } 2219 } 2220 2221 @Override 2222 public void onShellCommand(FileDescriptor in, FileDescriptor out, 2223 FileDescriptor err, String[] args, ResultReceiver resultReceiver) { 2224 (new Shell()).exec(this, in, out, err, args, resultReceiver); 2225 } 2226 2227 int onShellCommand(Shell shell, String cmd) { 2228 if (cmd == null) { 2229 return shell.handleDefaultCommands(cmd); 2230 } 2231 2232 final PrintWriter pw = shell.getOutPrintWriter(); 2233 try { 2234 switch(cmd) { 2235 case "list": 2236 return runList(pw); 2237 } 2238 } catch (RemoteException e) { 2239 pw.println("Remote exception: " + e); 2240 } 2241 return -1; 2242 } 2243 2244 private int runList(PrintWriter pw) throws RemoteException { 2245 final IActivityManager am = ActivityManagerNative.getDefault(); 2246 final List<UserInfo> users = getUsers(false); 2247 if (users == null) { 2248 pw.println("Error: couldn't get users"); 2249 return 1; 2250 } else { 2251 pw.println("Users:"); 2252 for (int i = 0; i < users.size(); i++) { 2253 String running = am.isUserRunning(users.get(i).id, false) ? " running" : ""; 2254 pw.println("\t" + users.get(i).toString() + running); 2255 } 2256 return 0; 2257 } 2258 } 2259 2260 @Override 2261 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2262 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 2263 != PackageManager.PERMISSION_GRANTED) { 2264 pw.println("Permission Denial: can't dump UserManager from from pid=" 2265 + Binder.getCallingPid() 2266 + ", uid=" + Binder.getCallingUid() 2267 + " without permission " 2268 + android.Manifest.permission.DUMP); 2269 return; 2270 } 2271 2272 long now = System.currentTimeMillis(); 2273 StringBuilder sb = new StringBuilder(); 2274 synchronized (mPackagesLock) { 2275 synchronized (mUsersLock) { 2276 pw.println("Users:"); 2277 for (int i = 0; i < mUsers.size(); i++) { 2278 UserInfo user = mUsers.valueAt(i); 2279 if (user == null) { 2280 continue; 2281 } 2282 pw.print(" "); pw.print(user); 2283 pw.print(" serialNo="); pw.print(user.serialNumber); 2284 if (mRemovingUserIds.get(mUsers.keyAt(i))) { 2285 pw.print(" <removing> "); 2286 } 2287 if (user.partial) { 2288 pw.print(" <partial>"); 2289 } 2290 pw.println(); 2291 pw.print(" Created: "); 2292 if (user.creationTime == 0) { 2293 pw.println("<unknown>"); 2294 } else { 2295 sb.setLength(0); 2296 TimeUtils.formatDuration(now - user.creationTime, sb); 2297 sb.append(" ago"); 2298 pw.println(sb); 2299 } 2300 pw.print(" Last logged in: "); 2301 if (user.lastLoggedInTime == 0) { 2302 pw.println("<unknown>"); 2303 } else { 2304 sb.setLength(0); 2305 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 2306 sb.append(" ago"); 2307 pw.println(sb); 2308 } 2309 pw.println(" Restrictions:"); 2310 synchronized (mRestrictionsLock) { 2311 UserRestrictionsUtils.dumpRestrictions( 2312 pw, " ", mBaseUserRestrictions.get(user.id)); 2313 pw.println(" Effective restrictions:"); 2314 UserRestrictionsUtils.dumpRestrictions( 2315 pw, " ", mCachedEffectiveUserRestrictions.get(user.id)); 2316 } 2317 } 2318 } 2319 pw.println(); 2320 pw.println("Guest restrictions:"); 2321 UserRestrictionsUtils.dumpRestrictions(pw, " ", mGuestRestrictions); 2322 } 2323 } 2324 2325 final class MainHandler extends Handler { 2326 2327 @Override 2328 public void handleMessage(Message msg) { 2329 switch (msg.what) { 2330 case WRITE_USER_MSG: 2331 removeMessages(WRITE_USER_MSG, msg.obj); 2332 synchronized (mPackagesLock) { 2333 int userId = ((UserInfo) msg.obj).id; 2334 UserInfo userInfo = getUserInfoNoChecks(userId); 2335 if (userInfo != null) { 2336 writeUserLP(userInfo); 2337 } 2338 } 2339 } 2340 } 2341 } 2342 2343 /** 2344 * @param userId 2345 * @return whether the user has been initialized yet 2346 */ 2347 boolean isInitialized(int userId) { 2348 return (getUserInfo(userId).flags & UserInfo.FLAG_INITIALIZED) != 0; 2349 } 2350 2351 private class LocalService extends UserManagerInternal { 2352 2353 @Override 2354 public Object getUserRestrictionsLock() { 2355 return mRestrictionsLock; 2356 } 2357 2358 @Override 2359 @GuardedBy("mRestrictionsLock") 2360 public void updateEffectiveUserRestrictionsLR(int userId) { 2361 UserManagerService.this.updateEffectiveUserRestrictionsLR(userId); 2362 } 2363 2364 @Override 2365 @GuardedBy("mRestrictionsLock") 2366 public void updateEffectiveUserRestrictionsForAllUsersLR() { 2367 UserManagerService.this.updateEffectiveUserRestrictionsForAllUsersLR(); 2368 } 2369 2370 @Override 2371 public Bundle getBaseUserRestrictions(int userId) { 2372 synchronized (mRestrictionsLock) { 2373 return mBaseUserRestrictions.get(userId); 2374 } 2375 } 2376 2377 @Override 2378 public void setBaseUserRestrictionsByDpmsForMigration( 2379 int userId, Bundle baseRestrictions) { 2380 synchronized (mRestrictionsLock) { 2381 mBaseUserRestrictions.put(userId, new Bundle(baseRestrictions)); 2382 invalidateEffectiveUserRestrictionsLR(userId); 2383 } 2384 2385 final UserInfo userInfo = getUserInfoNoChecks(userId); 2386 synchronized (mPackagesLock) { 2387 if (userInfo != null) { 2388 writeUserLP(userInfo); 2389 } else { 2390 Slog.w(LOG_TAG, "UserInfo not found for " + userId); 2391 } 2392 } 2393 } 2394 } 2395 2396 private class Shell extends ShellCommand { 2397 @Override 2398 public int onCommand(String cmd) { 2399 return onShellCommand(this, cmd); 2400 } 2401 2402 @Override 2403 public void onHelp() { 2404 final PrintWriter pw = getOutPrintWriter(); 2405 pw.println("User manager (user) commands:"); 2406 pw.println(" help"); 2407 pw.println(" Print this help text."); 2408 pw.println(""); 2409 pw.println(" list"); 2410 pw.println(" Prints all users on the system."); 2411 } 2412 } 2413} 2414