MÃ¥rten Kongstad | eabc9e9 | 2015-12-15 16:40:23 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2016 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 | |
| 17 | package com.android.server.om; |
| 18 | |
| 19 | import static android.app.AppGlobals.getPackageManager; |
| 20 | import static android.content.Intent.ACTION_PACKAGE_ADDED; |
| 21 | import static android.content.Intent.ACTION_PACKAGE_CHANGED; |
| 22 | import static android.content.Intent.ACTION_PACKAGE_REMOVED; |
| 23 | import static android.content.Intent.ACTION_USER_REMOVED; |
| 24 | import static android.content.pm.PackageManager.SIGNATURE_MATCH; |
| 25 | |
| 26 | import android.annotation.NonNull; |
| 27 | import android.annotation.Nullable; |
| 28 | import android.app.ActivityManager; |
| 29 | import android.app.ActivityManagerNative; |
| 30 | import android.app.IActivityManager; |
| 31 | import android.content.BroadcastReceiver; |
| 32 | import android.content.Context; |
| 33 | import android.content.Intent; |
| 34 | import android.content.IntentFilter; |
| 35 | import android.content.om.IOverlayManager; |
| 36 | import android.content.om.OverlayInfo; |
| 37 | import android.content.pm.IPackageManager; |
| 38 | import android.content.pm.PackageInfo; |
| 39 | import android.content.pm.PackageManagerInternal; |
| 40 | import android.content.pm.UserInfo; |
| 41 | import android.net.Uri; |
| 42 | import android.os.Binder; |
| 43 | import android.os.Environment; |
| 44 | import android.os.IBinder; |
| 45 | import android.os.Process; |
| 46 | import android.os.RemoteException; |
| 47 | import android.os.ResultReceiver; |
| 48 | import android.os.ShellCallback; |
| 49 | import android.os.UserHandle; |
| 50 | import android.util.ArrayMap; |
| 51 | import android.util.AtomicFile; |
| 52 | import android.util.Slog; |
| 53 | import android.util.SparseArray; |
| 54 | |
| 55 | import com.android.server.FgThread; |
| 56 | import com.android.server.IoThread; |
| 57 | import com.android.server.LocalServices; |
| 58 | import com.android.server.SystemService; |
| 59 | import com.android.server.pm.Installer; |
| 60 | import com.android.server.pm.UserManagerService; |
| 61 | |
| 62 | import org.xmlpull.v1.XmlPullParserException; |
| 63 | |
| 64 | import java.io.File; |
| 65 | import java.io.FileDescriptor; |
| 66 | import java.io.FileInputStream; |
| 67 | import java.io.FileOutputStream; |
| 68 | import java.io.IOException; |
| 69 | import java.io.PrintWriter; |
| 70 | import java.util.ArrayList; |
| 71 | import java.util.Collections; |
| 72 | import java.util.HashMap; |
| 73 | import java.util.List; |
| 74 | import java.util.Map; |
| 75 | import java.util.concurrent.atomic.AtomicBoolean; |
| 76 | |
| 77 | /** |
| 78 | * Service to manage asset overlays. |
| 79 | * |
| 80 | * <p>Asset overlays are additional resources that come from apks loaded |
| 81 | * alongside the system and app apks. This service, the OverlayManagerService |
| 82 | * (OMS), tracks which installed overlays to use and provides methods to change |
| 83 | * this. Changes propagate to running applications as part of the Activity |
| 84 | * lifecycle. This allows Activities to reread their resources at a well |
| 85 | * defined point.</p> |
| 86 | * |
| 87 | * <p>By itself, the OMS will not change what overlays should be active. |
| 88 | * Instead, it is only responsible for making sure that overlays *can* be used |
| 89 | * from a technical and security point of view and to activate overlays in |
| 90 | * response to external requests. The responsibility to toggle overlays on and |
| 91 | * off lies within components that implement different use-cases such as themes |
| 92 | * or dynamic customization.</p> |
| 93 | * |
| 94 | * <p>The OMS receives input from three sources:</p> |
| 95 | * |
| 96 | * <ul> |
| 97 | * <li>Callbacks from the SystemService class, specifically when the |
| 98 | * Android framework is booting and when the end user switches Android |
| 99 | * users.</li> |
| 100 | * |
| 101 | * <li>Intents from the PackageManagerService (PMS). Overlays are regular |
| 102 | * apks, and whenever a package is installed (or removed, or has a |
| 103 | * component enabled or disabled), the PMS broadcasts this as an intent. |
| 104 | * When the OMS receives one of these intents, it updates its internal |
| 105 | * representation of the available overlays and, if there was a visible |
| 106 | * change, triggers an asset refresh in the affected apps.</li> |
| 107 | * |
| 108 | * <li>External requests via the {@link IOverlayManager AIDL interface}. |
| 109 | * The interface allows clients to read information about the currently |
| 110 | * available overlays, change whether an overlay should be used or not, and |
| 111 | * change the relative order in which overlay packages are loaded. |
| 112 | * Read-access is granted if the request targets the same Android user as |
| 113 | * the caller runs as, or if the caller holds the |
| 114 | * INTERACT_ACROSS_USERS_FULL permission. Write-access is granted if the |
| 115 | * caller is granted read-access and additionaly holds the |
| 116 | * CHANGE_OVERLAY_PACKAGES permission.</li> |
| 117 | * </ul> |
| 118 | * |
| 119 | * <p>The AIDL interface works with String package names, int user IDs, and |
| 120 | * {@link OverlayInfo} objects. OverlayInfo instances are used to track a |
| 121 | * specific pair of target and overlay packages and include information such as |
| 122 | * the current state of the overlay. OverlayInfo objects are immutable.</p> |
| 123 | * |
| 124 | * <p>Internally, OverlayInfo objects are maintained by the |
| 125 | * OverlayManagerSettings class. The OMS and its helper classes are notified of |
| 126 | * changes to the settings by the OverlayManagerSettings.ChangeListener |
| 127 | * callback interface. The file /data/system/overlays.xml is used to persist |
| 128 | * the settings.</p> |
| 129 | * |
| 130 | * <p>Creation and deletion of idmap files are handled by the IdmapManager |
| 131 | * class.</p> |
| 132 | * |
| 133 | * <p>The following is an overview of OMS and its related classes. Note how box |
| 134 | * (2) does the heavy lifting, box (1) interacts with the Android framework, |
| 135 | * and box (3) replaces box (1) during unit testing.</p> |
| 136 | * |
| 137 | * <pre> |
| 138 | * Android framework |
| 139 | * | ^ |
| 140 | * . . . | . . . . | . . . . |
| 141 | * . | | . |
| 142 | * . AIDL, broadcasts . |
| 143 | * . intents | . |
| 144 | * . | | . . . . . . . . . . . . |
| 145 | * . v | . . |
| 146 | * . OverlayManagerService . OverlayManagerTests . |
| 147 | * . \ . / . |
| 148 | * . (1) \ . / (3) . |
| 149 | * . . . . . . . . . . \ . . . / . . . . . . . . . |
| 150 | * . \ / . |
| 151 | * . (2) \ / . |
| 152 | * . OverlayManagerServiceImpl . |
| 153 | * . | | . |
| 154 | * . | | . |
| 155 | * . OverlayManagerSettings IdmapManager . |
| 156 | * . . |
| 157 | * . . . . . . . . . . . . . . . . . . . . . . |
| 158 | * </pre> |
| 159 | * |
| 160 | * <p>Finally, here is a list of keywords used in the OMS context.</p> |
| 161 | * |
| 162 | * <ul> |
| 163 | * <li><b>target [package]</b> -- A regular apk that may have its resource |
| 164 | * pool extended by zero or more overlay packages.</li> |
| 165 | * |
| 166 | * <li><b>overlay [package]</b> -- An apk that provides additional |
| 167 | * resources to another apk.</li> |
| 168 | * |
| 169 | * <li><b>OMS</b> -- The OverlayManagerService, i.e. this class.</li> |
| 170 | * |
| 171 | * <li><b>approved</b> -- An overlay is approved if the OMS has verified |
| 172 | * that it can be used technically speaking (its target package is |
| 173 | * installed, at least one resource name in both packages match, the |
| 174 | * idmap was created, etc) and that it is secure to do so. External |
| 175 | * clients can not change this state.</li> |
| 176 | * |
| 177 | * <li><b>not approved</b> -- The opposite of approved.</li> |
| 178 | * |
| 179 | * <li><b>enabled</b> -- An overlay currently in active use and thus part |
| 180 | * of resource lookups. This requires the overlay to be approved. Only |
| 181 | * external clients can change this state.</li> |
| 182 | * |
| 183 | * <li><b>disabled</b> -- The opposite of enabled.</li> |
| 184 | * |
| 185 | * <li><b>idmap</b> -- A mapping of resource IDs between target and overlay |
| 186 | * used during resource lookup. Also the name of the binary that creates |
| 187 | * the mapping.</li> |
| 188 | * </ul> |
| 189 | */ |
| 190 | public final class OverlayManagerService extends SystemService { |
| 191 | |
| 192 | static final String TAG = "OverlayManager"; |
| 193 | |
| 194 | static final boolean DEBUG = false; |
| 195 | |
| 196 | static final String PERMISSION_DENIED = "Operation not permitted for user shell"; |
| 197 | |
| 198 | private final Object mLock = new Object(); |
| 199 | |
| 200 | private final AtomicFile mSettingsFile; |
| 201 | |
| 202 | private final PackageManagerHelper mPackageManager; |
| 203 | |
| 204 | private final UserManagerService mUserManager; |
| 205 | |
| 206 | private final OverlayManagerSettings mSettings; |
| 207 | |
| 208 | private final OverlayManagerServiceImpl mImpl; |
| 209 | |
| 210 | private final AtomicBoolean mPersistSettingsScheduled = new AtomicBoolean(false); |
| 211 | |
| 212 | public OverlayManagerService(@NonNull final Context context, |
| 213 | @NonNull final Installer installer) { |
| 214 | super(context); |
| 215 | mSettingsFile = |
| 216 | new AtomicFile(new File(Environment.getDataSystemDirectory(), "overlays.xml")); |
| 217 | mPackageManager = new PackageManagerHelper(); |
| 218 | mUserManager = UserManagerService.getInstance(); |
| 219 | IdmapManager im = new IdmapManager(installer); |
| 220 | mSettings = new OverlayManagerSettings(); |
| 221 | mImpl = new OverlayManagerServiceImpl(mPackageManager, im, mSettings); |
| 222 | |
| 223 | final IntentFilter packageFilter = new IntentFilter(); |
| 224 | packageFilter.addAction(ACTION_PACKAGE_ADDED); |
| 225 | packageFilter.addAction(ACTION_PACKAGE_CHANGED); |
| 226 | packageFilter.addAction(ACTION_PACKAGE_REMOVED); |
| 227 | packageFilter.addDataScheme("package"); |
| 228 | getContext().registerReceiverAsUser(new PackageReceiver(), UserHandle.ALL, |
| 229 | packageFilter, null, null); |
| 230 | |
| 231 | final IntentFilter userFilter = new IntentFilter(); |
| 232 | userFilter.addAction(ACTION_USER_REMOVED); |
| 233 | getContext().registerReceiverAsUser(new UserReceiver(), UserHandle.ALL, |
| 234 | userFilter, null, null); |
| 235 | |
| 236 | restoreSettings(); |
| 237 | onSwitchUser(UserHandle.USER_SYSTEM); |
| 238 | schedulePersistSettings(); |
| 239 | |
| 240 | mSettings.addChangeListener(new OverlayChangeListener()); |
| 241 | |
| 242 | publishBinderService(Context.OVERLAY_SERVICE, mService); |
| 243 | publishLocalService(OverlayManagerService.class, this); |
| 244 | } |
| 245 | |
| 246 | @Override |
| 247 | public void onStart() { |
| 248 | // Intentionally left empty. |
| 249 | } |
| 250 | |
| 251 | @Override |
| 252 | public void onSwitchUser(final int newUserId) { |
| 253 | // ensure overlays in the settings are up-to-date, and propagate |
| 254 | // any asset changes to the rest of the system |
| 255 | final List<String> targets; |
| 256 | synchronized (mLock) { |
| 257 | targets = mImpl.onSwitchUser(newUserId); |
| 258 | } |
| 259 | updateAssets(newUserId, targets); |
| 260 | } |
| 261 | |
| 262 | private final class PackageReceiver extends BroadcastReceiver { |
| 263 | @Override |
| 264 | public void onReceive(@NonNull final Context context, @NonNull final Intent intent) { |
| 265 | final Uri data = intent.getData(); |
| 266 | if (data == null) { |
| 267 | Slog.e(TAG, "Cannot handle package broadcast with null data"); |
| 268 | return; |
| 269 | } |
| 270 | final String packageName = data.getSchemeSpecificPart(); |
| 271 | |
| 272 | final boolean replacing = intent.getBooleanExtra(Intent.EXTRA_REPLACING, false); |
| 273 | |
| 274 | final int[] userIds; |
| 275 | final int extraUid = intent.getIntExtra(Intent.EXTRA_UID, UserHandle.USER_NULL); |
| 276 | if (extraUid == UserHandle.USER_NULL) { |
| 277 | userIds = mUserManager.getUserIds(); |
| 278 | } else { |
| 279 | userIds = new int[] { UserHandle.getUserId(extraUid) }; |
| 280 | } |
| 281 | |
| 282 | switch (intent.getAction()) { |
| 283 | case ACTION_PACKAGE_ADDED: |
| 284 | if (replacing) { |
| 285 | onPackageUpgraded(packageName, userIds); |
| 286 | } else { |
| 287 | onPackageAdded(packageName, userIds); |
| 288 | } |
| 289 | break; |
| 290 | case ACTION_PACKAGE_CHANGED: |
| 291 | onPackageChanged(packageName, userIds); |
| 292 | break; |
| 293 | case ACTION_PACKAGE_REMOVED: |
| 294 | if (replacing) { |
| 295 | onPackageUpgrading(packageName, userIds); |
| 296 | } else { |
| 297 | onPackageRemoved(packageName, userIds); |
| 298 | } |
| 299 | break; |
| 300 | default: |
| 301 | // do nothing |
| 302 | break; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | private void onPackageAdded(@NonNull final String packageName, |
| 307 | @NonNull final int[] userIds) { |
| 308 | for (final int userId : userIds) { |
| 309 | synchronized (mLock) { |
| 310 | final PackageInfo pi = mPackageManager.getPackageInfo(packageName, userId, false); |
| 311 | if (pi != null) { |
| 312 | mPackageManager.cachePackageInfo(packageName, userId, pi); |
| 313 | if (!isOverlayPackage(pi)) { |
| 314 | mImpl.onTargetPackageAdded(packageName, userId); |
| 315 | } else { |
| 316 | mImpl.onOverlayPackageAdded(packageName, userId); |
| 317 | } |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | private void onPackageChanged(@NonNull final String packageName, |
| 324 | @NonNull final int[] userIds) { |
| 325 | for (int userId : userIds) { |
| 326 | synchronized (mLock) { |
| 327 | final PackageInfo pi = mPackageManager.getPackageInfo(packageName, userId, false); |
| 328 | if (pi != null) { |
| 329 | mPackageManager.cachePackageInfo(packageName, userId, pi); |
| 330 | if (!isOverlayPackage(pi)) { |
| 331 | mImpl.onTargetPackageChanged(packageName, userId); |
| 332 | } else { |
| 333 | mImpl.onOverlayPackageChanged(packageName, userId); |
| 334 | } |
| 335 | } |
| 336 | } |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | private void onPackageUpgrading(@NonNull final String packageName, |
| 341 | @NonNull final int[] userIds) { |
| 342 | for (int userId : userIds) { |
| 343 | synchronized (mLock) { |
| 344 | mPackageManager.forgetPackageInfo(packageName, userId); |
| 345 | final OverlayInfo oi = mImpl.getOverlayInfo(packageName, userId); |
| 346 | if (oi == null) { |
| 347 | mImpl.onTargetPackageUpgrading(packageName, userId); |
| 348 | } else { |
| 349 | mImpl.onOverlayPackageUpgrading(packageName, userId); |
| 350 | } |
| 351 | } |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | private void onPackageUpgraded(@NonNull final String packageName, |
| 356 | @NonNull final int[] userIds) { |
| 357 | for (int userId : userIds) { |
| 358 | synchronized (mLock) { |
| 359 | final PackageInfo pi = mPackageManager.getPackageInfo(packageName, userId, false); |
| 360 | if (pi != null) { |
| 361 | mPackageManager.cachePackageInfo(packageName, userId, pi); |
| 362 | if (!isOverlayPackage(pi)) { |
| 363 | mImpl.onTargetPackageUpgraded(packageName, userId); |
| 364 | } else { |
| 365 | mImpl.onOverlayPackageUpgraded(packageName, userId); |
| 366 | } |
| 367 | } |
| 368 | } |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | private void onPackageRemoved(@NonNull final String packageName, |
| 373 | @NonNull final int[] userIds) { |
| 374 | for (int userId : userIds) { |
| 375 | synchronized (mLock) { |
| 376 | mPackageManager.forgetPackageInfo(packageName, userId); |
| 377 | final OverlayInfo oi = mImpl.getOverlayInfo(packageName, userId); |
| 378 | if (oi == null) { |
| 379 | mImpl.onTargetPackageRemoved(packageName, userId); |
| 380 | } else { |
| 381 | mImpl.onOverlayPackageRemoved(packageName, userId); |
| 382 | } |
| 383 | } |
| 384 | } |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | private final class UserReceiver extends BroadcastReceiver { |
| 389 | @Override |
| 390 | public void onReceive(@NonNull final Context context, @NonNull final Intent intent) { |
| 391 | switch (intent.getAction()) { |
| 392 | case ACTION_USER_REMOVED: |
| 393 | final int userId = |
| 394 | intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); |
| 395 | if (userId != UserHandle.USER_NULL) { |
| 396 | synchronized (mLock) { |
| 397 | mImpl.onUserRemoved(userId); |
| 398 | mPackageManager.forgetAllPackageInfos(userId); |
| 399 | } |
| 400 | } |
| 401 | break; |
| 402 | default: |
| 403 | // do nothing |
| 404 | break; |
| 405 | } |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | private final IBinder mService = new IOverlayManager.Stub() { |
| 410 | @Override |
| 411 | public Map<String, List<OverlayInfo>> getAllOverlays(int userId) |
| 412 | throws RemoteException { |
| 413 | userId = handleIncomingUser(userId, "getAllOverlays"); |
| 414 | |
| 415 | synchronized (mLock) { |
| 416 | return mImpl.getOverlaysForUser(userId); |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | @Override |
| 421 | public List<OverlayInfo> getOverlayInfosForTarget(@Nullable final String targetPackageName, |
| 422 | int userId) throws RemoteException { |
| 423 | userId = handleIncomingUser(userId, "getOverlayInfosForTarget"); |
| 424 | if (targetPackageName == null) { |
| 425 | return Collections.emptyList(); |
| 426 | } |
| 427 | |
| 428 | synchronized (mLock) { |
| 429 | return mImpl.getOverlayInfosForTarget(targetPackageName, userId); |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | @Override |
| 434 | public OverlayInfo getOverlayInfo(@Nullable final String packageName, |
| 435 | int userId) throws RemoteException { |
| 436 | userId = handleIncomingUser(userId, "getOverlayInfo"); |
| 437 | if (packageName == null) { |
| 438 | return null; |
| 439 | } |
| 440 | |
| 441 | synchronized (mLock) { |
| 442 | return mImpl.getOverlayInfo(packageName, userId); |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | @Override |
| 447 | public boolean setEnabled(@Nullable final String packageName, final boolean enable, |
| 448 | int userId) throws RemoteException { |
| 449 | enforceChangeOverlayPackagesPermission("setEnabled"); |
| 450 | userId = handleIncomingUser(userId, "setEnabled"); |
| 451 | if (packageName == null) { |
| 452 | return false; |
| 453 | } |
| 454 | |
| 455 | final long ident = Binder.clearCallingIdentity(); |
| 456 | try { |
| 457 | synchronized (mLock) { |
| 458 | return mImpl.setEnabled(packageName, enable, userId); |
| 459 | } |
| 460 | } finally { |
| 461 | Binder.restoreCallingIdentity(ident); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | @Override |
| 466 | public boolean setPriority(@Nullable final String packageName, |
| 467 | @Nullable final String parentPackageName, int userId) throws RemoteException { |
| 468 | enforceChangeOverlayPackagesPermission("setPriority"); |
| 469 | userId = handleIncomingUser(userId, "setPriority"); |
| 470 | if (packageName == null || parentPackageName == null) { |
| 471 | return false; |
| 472 | } |
| 473 | |
| 474 | final long ident = Binder.clearCallingIdentity(); |
| 475 | try { |
| 476 | synchronized (mLock) { |
| 477 | return mImpl.setPriority(packageName, parentPackageName, userId); |
| 478 | } |
| 479 | } finally { |
| 480 | Binder.restoreCallingIdentity(ident); |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | @Override |
| 485 | public boolean setHighestPriority(@Nullable final String packageName, int userId) |
| 486 | throws RemoteException { |
| 487 | enforceChangeOverlayPackagesPermission("setHighestPriority"); |
| 488 | userId = handleIncomingUser(userId, "setHighestPriority"); |
| 489 | if (packageName == null) { |
| 490 | return false; |
| 491 | } |
| 492 | |
| 493 | final long ident = Binder.clearCallingIdentity(); |
| 494 | try { |
| 495 | synchronized (mLock) { |
| 496 | return mImpl.setHighestPriority(packageName, userId); |
| 497 | } |
| 498 | } finally { |
| 499 | Binder.restoreCallingIdentity(ident); |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | @Override |
| 504 | public boolean setLowestPriority(@Nullable final String packageName, int userId) |
| 505 | throws RemoteException { |
| 506 | enforceChangeOverlayPackagesPermission("setLowestPriority"); |
| 507 | userId = handleIncomingUser(userId, "setLowestPriority"); |
| 508 | if (packageName == null) { |
| 509 | return false; |
| 510 | } |
| 511 | |
| 512 | final long ident = Binder.clearCallingIdentity(); |
| 513 | try { |
| 514 | synchronized (mLock) { |
| 515 | return mImpl.setLowestPriority(packageName, userId); |
| 516 | } |
| 517 | } finally { |
| 518 | Binder.restoreCallingIdentity(ident); |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | @Override |
| 523 | public void onShellCommand(@NonNull final FileDescriptor in, |
| 524 | @NonNull final FileDescriptor out, @NonNull final FileDescriptor err, |
| 525 | @NonNull final String[] args, @NonNull final ShellCallback callback, |
| 526 | @NonNull final ResultReceiver resultReceiver) { |
| 527 | (new OverlayManagerShellCommand(this)).exec( |
| 528 | this, in, out, err, args, callback, resultReceiver); |
| 529 | } |
| 530 | |
| 531 | @Override |
| 532 | protected void dump(@NonNull final FileDescriptor fd, @NonNull final PrintWriter pw, |
| 533 | @NonNull final String[] argv) { |
| 534 | enforceDumpPermission("dump"); |
| 535 | |
| 536 | final boolean verbose = argv.length > 0 && "--verbose".equals(argv[0]); |
| 537 | |
| 538 | synchronized (mLock) { |
| 539 | mImpl.onDump(pw); |
| 540 | mPackageManager.dump(pw, verbose); |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | /** |
| 545 | * Ensure that the caller has permission to interact with the given userId. |
| 546 | * If the calling user is not the same as the provided user, the caller needs |
| 547 | * to hold the INTERACT_ACROSS_USERS_FULL permission (or be system uid or |
| 548 | * root). |
| 549 | * |
| 550 | * @param userId the user to interact with |
| 551 | * @param message message for any SecurityException |
| 552 | */ |
| 553 | private int handleIncomingUser(final int userId, @NonNull final String message) { |
| 554 | return ActivityManager.handleIncomingUser(Binder.getCallingPid(), |
| 555 | Binder.getCallingUid(), userId, false, true, message, null); |
| 556 | } |
| 557 | |
| 558 | /** |
| 559 | * Enforce that the caller holds the CHANGE_OVERLAY_PACKAGES permission (or is |
| 560 | * system or root). |
| 561 | * |
| 562 | * @param message used as message if SecurityException is thrown |
| 563 | * @throws SecurityException if the permission check fails |
| 564 | */ |
| 565 | private void enforceChangeOverlayPackagesPermission(@NonNull final String message) { |
| 566 | getContext().enforceCallingOrSelfPermission( |
| 567 | android.Manifest.permission.CHANGE_OVERLAY_PACKAGES, message); |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * Enforce that the caller holds the DUMP permission (or is system or root). |
| 572 | * |
| 573 | * @param message used as message if SecurityException is thrown |
| 574 | * @throws SecurityException if the permission check fails |
| 575 | */ |
| 576 | private void enforceDumpPermission(@NonNull final String message) { |
| 577 | getContext().enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, |
| 578 | message); |
| 579 | } |
| 580 | }; |
| 581 | |
| 582 | private boolean isOverlayPackage(@NonNull final PackageInfo pi) { |
| 583 | return pi != null && pi.overlayTarget != null; |
| 584 | } |
| 585 | |
| 586 | private final class OverlayChangeListener implements OverlayManagerSettings.ChangeListener { |
| 587 | @Override |
| 588 | public void onSettingsChanged() { |
| 589 | schedulePersistSettings(); |
| 590 | } |
| 591 | |
| 592 | @Override |
| 593 | public void onOverlayAdded(@NonNull final OverlayInfo oi) { |
| 594 | scheduleBroadcast(Intent.ACTION_OVERLAY_ADDED, oi, oi.isEnabled()); |
| 595 | } |
| 596 | |
| 597 | @Override |
| 598 | public void onOverlayRemoved(@NonNull final OverlayInfo oi) { |
| 599 | scheduleBroadcast(Intent.ACTION_OVERLAY_REMOVED, oi, oi.isEnabled()); |
| 600 | } |
| 601 | |
| 602 | @Override |
| 603 | public void onOverlayChanged(@NonNull final OverlayInfo oi, |
| 604 | @NonNull final OverlayInfo oldOi) { |
| 605 | scheduleBroadcast(Intent.ACTION_OVERLAY_CHANGED, oi, oi.isEnabled() != oldOi.isEnabled()); |
| 606 | } |
| 607 | |
| 608 | @Override |
| 609 | public void onOverlayPriorityChanged(@NonNull final OverlayInfo oi) { |
| 610 | scheduleBroadcast(Intent.ACTION_OVERLAY_PRIORITY_CHANGED, oi, oi.isEnabled()); |
| 611 | } |
| 612 | |
| 613 | private void scheduleBroadcast(@NonNull final String action, @NonNull final OverlayInfo oi, |
| 614 | final boolean doUpdate) { |
| 615 | FgThread.getHandler().post(new BroadcastRunnable(action, oi, doUpdate)); |
| 616 | } |
| 617 | |
| 618 | private final class BroadcastRunnable implements Runnable { |
| 619 | private final String mAction; |
| 620 | private final OverlayInfo mOverlayInfo; |
| 621 | private final boolean mDoUpdate; |
| 622 | |
| 623 | BroadcastRunnable(@NonNull final String action, @NonNull final OverlayInfo oi, |
| 624 | final boolean doUpdate) { |
| 625 | mAction = action; |
| 626 | mOverlayInfo = oi; |
| 627 | mDoUpdate = doUpdate; |
| 628 | } |
| 629 | |
| 630 | @Override |
| 631 | public void run() { |
| 632 | if (mDoUpdate) { |
| 633 | updateAssets(mOverlayInfo.userId, mOverlayInfo.targetPackageName); |
| 634 | } |
| 635 | sendBroadcast(mAction, mOverlayInfo.targetPackageName, mOverlayInfo.packageName, |
| 636 | mOverlayInfo.userId); |
| 637 | } |
| 638 | |
| 639 | private void sendBroadcast(@NonNull final String action, |
| 640 | @NonNull final String targetPackageName, @NonNull final String packageName, |
| 641 | final int userId) { |
| 642 | final Intent intent = new Intent(action, Uri.fromParts("package", |
| 643 | String.format("%s/%s", targetPackageName, packageName), null)); |
| 644 | intent.setFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); |
| 645 | if (DEBUG) { |
| 646 | Slog.d(TAG, String.format("send broadcast %s", intent)); |
| 647 | } |
| 648 | try { |
| 649 | ActivityManagerNative.getDefault().broadcastIntent(null, intent, null, null, 0, |
| 650 | null, null, null, android.app.AppOpsManager.OP_NONE, null, false, false, |
| 651 | userId); |
| 652 | } catch (RemoteException e) { |
| 653 | // Intentionally left empty. |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | private void updateAssets(final int userId, final String targetPackageName) { |
| 661 | final List<String> list = new ArrayList<>(); |
| 662 | list.add(targetPackageName); |
| 663 | updateAssets(userId, list); |
| 664 | } |
| 665 | |
| 666 | private void updateAssets(final int userId, List<String> targetPackageNames) { |
| 667 | // TODO: implement when we integrate OMS properly |
| 668 | } |
| 669 | |
| 670 | private void schedulePersistSettings() { |
| 671 | if (mPersistSettingsScheduled.getAndSet(true)) { |
| 672 | return; |
| 673 | } |
| 674 | IoThread.getHandler().post(new Runnable() { |
| 675 | @Override |
| 676 | public void run() { |
| 677 | mPersistSettingsScheduled.set(false); |
| 678 | synchronized (mLock) { |
| 679 | FileOutputStream stream = null; |
| 680 | try { |
| 681 | stream = mSettingsFile.startWrite(); |
| 682 | mSettings.persist(stream); |
| 683 | mSettingsFile.finishWrite(stream); |
| 684 | } catch (IOException | XmlPullParserException e) { |
| 685 | mSettingsFile.failWrite(stream); |
| 686 | Slog.e(TAG, "failed to persist overlay state", e); |
| 687 | } |
| 688 | } |
| 689 | } |
| 690 | }); |
| 691 | } |
| 692 | |
| 693 | private void restoreSettings() { |
| 694 | synchronized (mLock) { |
| 695 | if (!mSettingsFile.getBaseFile().exists()) { |
| 696 | return; |
| 697 | } |
| 698 | try (final FileInputStream stream = mSettingsFile.openRead()) { |
| 699 | mSettings.restore(stream); |
| 700 | |
| 701 | // We might have data for dying users if the device was |
| 702 | // restarted before we received USER_REMOVED. Remove data for |
| 703 | // users that will not exist after the system is ready. |
| 704 | |
| 705 | final List<UserInfo> deadUsers = getDeadUsers(); |
| 706 | final int N = deadUsers.size(); |
| 707 | for (int i = 0; i < N; i++) { |
| 708 | final UserInfo deadUser = deadUsers.get(i); |
| 709 | final int userId = deadUser.getUserHandle().getIdentifier(); |
| 710 | mSettings.removeUser(userId); |
| 711 | } |
| 712 | } catch (IOException | XmlPullParserException e) { |
| 713 | Slog.e(TAG, "failed to restore overlay state", e); |
| 714 | } |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | private List<UserInfo> getDeadUsers() { |
| 719 | final List<UserInfo> users = mUserManager.getUsers(false); |
| 720 | final List<UserInfo> onlyLiveUsers = mUserManager.getUsers(true); |
| 721 | users.removeAll(onlyLiveUsers); |
| 722 | return users; |
| 723 | } |
| 724 | |
| 725 | private static final class PackageManagerHelper implements |
| 726 | OverlayManagerServiceImpl.PackageManagerHelper { |
| 727 | |
| 728 | private final IPackageManager mPackageManager; |
| 729 | private final PackageManagerInternal mPackageManagerInternal; |
| 730 | |
| 731 | // Use a cache for performance and for consistency within OMS: because |
| 732 | // additional PACKAGE_* intents may be delivered while we process an |
| 733 | // intent, querying the PackageManagerService for the actual current |
| 734 | // state may lead to contradictions within OMS. Better then to lag |
| 735 | // behind until all pending intents have been processed. |
| 736 | private final SparseArray<HashMap<String, PackageInfo>> mCache = new SparseArray<>(); |
| 737 | |
| 738 | PackageManagerHelper() { |
| 739 | mPackageManager = getPackageManager(); |
| 740 | mPackageManagerInternal = LocalServices.getService(PackageManagerInternal.class); |
| 741 | } |
| 742 | |
| 743 | public PackageInfo getPackageInfo(@NonNull final String packageName, final int userId, |
| 744 | final boolean useCache) { |
| 745 | if (useCache) { |
| 746 | final PackageInfo cachedPi = getCachedPackageInfo(packageName, userId); |
| 747 | if (cachedPi != null) { |
| 748 | return cachedPi; |
| 749 | } |
| 750 | } |
| 751 | try { |
| 752 | final PackageInfo pi = mPackageManager.getPackageInfo(packageName, 0, userId); |
| 753 | if (useCache && pi != null) { |
| 754 | cachePackageInfo(packageName, userId, pi); |
| 755 | } |
| 756 | return pi; |
| 757 | } catch (RemoteException e) { |
| 758 | // Intentionally left empty. |
| 759 | } |
| 760 | return null; |
| 761 | } |
| 762 | |
| 763 | @Override |
| 764 | public PackageInfo getPackageInfo(@NonNull final String packageName, final int userId) { |
| 765 | return getPackageInfo(packageName, userId, true); |
| 766 | } |
| 767 | |
| 768 | @Override |
| 769 | public boolean signaturesMatching(@NonNull final String packageName1, |
| 770 | @NonNull final String packageName2, final int userId) { |
| 771 | // The package manager does not support different versions of packages |
| 772 | // to be installed for different users: ignore userId for now. |
| 773 | try { |
| 774 | return mPackageManager.checkSignatures(packageName1, packageName2) == SIGNATURE_MATCH; |
| 775 | } catch (RemoteException e) { |
| 776 | // Intentionally left blank |
| 777 | } |
| 778 | return false; |
| 779 | } |
| 780 | |
| 781 | @Override |
| 782 | public List<PackageInfo> getOverlayPackages(final int userId) { |
| 783 | return mPackageManagerInternal.getOverlayPackages(userId); |
| 784 | } |
| 785 | |
| 786 | public PackageInfo getCachedPackageInfo(@NonNull final String packageName, |
| 787 | final int userId) { |
| 788 | final HashMap<String, PackageInfo> map = mCache.get(userId); |
| 789 | return map == null ? null : map.get(packageName); |
| 790 | } |
| 791 | |
| 792 | public void cachePackageInfo(@NonNull final String packageName, final int userId, |
| 793 | @NonNull final PackageInfo pi) { |
| 794 | HashMap<String, PackageInfo> map = mCache.get(userId); |
| 795 | if (map == null) { |
| 796 | map = new HashMap<>(); |
| 797 | mCache.put(userId, map); |
| 798 | } |
| 799 | map.put(packageName, pi); |
| 800 | } |
| 801 | |
| 802 | public void forgetPackageInfo(@NonNull final String packageName, final int userId) { |
| 803 | final HashMap<String, PackageInfo> map = mCache.get(userId); |
| 804 | if (map == null) { |
| 805 | return; |
| 806 | } |
| 807 | map.remove(packageName); |
| 808 | if (map.isEmpty()) { |
| 809 | mCache.delete(userId); |
| 810 | } |
| 811 | } |
| 812 | |
| 813 | public void forgetAllPackageInfos(final int userId) { |
| 814 | mCache.delete(userId); |
| 815 | } |
| 816 | |
| 817 | private static final String TAB1 = " "; |
| 818 | private static final String TAB2 = TAB1 + TAB1; |
| 819 | |
| 820 | public void dump(@NonNull final PrintWriter pw, final boolean verbose) { |
| 821 | pw.println("PackageInfo cache"); |
| 822 | |
| 823 | if (!verbose) { |
| 824 | int count = 0; |
| 825 | final int N = mCache.size(); |
| 826 | for (int i = 0; i < N; i++) { |
| 827 | final int userId = mCache.keyAt(i); |
| 828 | count += mCache.get(userId).size(); |
| 829 | } |
| 830 | pw.println(TAB1 + count + " package(s)"); |
| 831 | return; |
| 832 | } |
| 833 | |
| 834 | if (mCache.size() == 0) { |
| 835 | pw.println(TAB1 + "<empty>"); |
| 836 | return; |
| 837 | } |
| 838 | |
| 839 | final int N = mCache.size(); |
| 840 | for (int i = 0; i < N; i++) { |
| 841 | final int userId = mCache.keyAt(i); |
| 842 | pw.println(TAB1 + "User " + userId); |
| 843 | final HashMap<String, PackageInfo> map = mCache.get(userId); |
| 844 | for (Map.Entry<String, PackageInfo> entry : map.entrySet()) { |
| 845 | pw.println(TAB2 + entry.getKey() + ": " + entry.getValue()); |
| 846 | } |
| 847 | } |
| 848 | } |
| 849 | } |
| 850 | } |