Merge "Let SysUI set wake-from-idle alarms with impunity" (1469e575) · Commits · e / os / android_frameworks_base

packages/SystemUI/AndroidManifest.xml

+4 −0

Original line number	Diff line number	Diff line
		@@ -24,6 +24,10 @@

		<protected-broadcast android:name="com.android.systemui.action.PLUGIN_CHANGED" />

		<!-- SysUI must be the one to define this permission; its name is
		referenced by the core OS. -->
		<permission android:name="android.permission.systemui.IDENTITY"
		android:protectionLevel="signature" />

		<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
		<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

services/core/java/com/android/server/AlarmManagerService.java

+38 −0

Original line number	Diff line number	Diff line
		@@ -31,7 +31,11 @@ import android.content.ContentResolver;
		import android.content.Context;
		import android.content.Intent;
		import android.content.IntentFilter;
		import android.content.pm.ApplicationInfo;
		import android.content.pm.PackageInfo;
		import android.content.pm.PackageManager;
		import android.content.pm.PackageManager.NameNotFoundException;
		import android.content.pm.PermissionInfo;
		import android.database.ContentObserver;
		import android.net.Uri;
		import android.os.Binder;
		@@ -153,6 +157,20 @@ class AlarmManagerService extends SystemService {
		long mAllowWhileIdleMinTime;
		int mNumTimeChanged;

		// Bookkeeping about the identity of the "System UI" package, determined at runtime.

		/**
		* This permission must be defined by the canonical System UI package,
		* with protection level "signature".
		*/
		private static final String SYSTEM_UI_SELF_PERMISSION =
		"android.permission.systemui.IDENTITY";

		/**
		* At boot we use SYSTEM_UI_SELF_PERMISSION to look up the definer's uid.
		*/
		int mSystemUiUid;

		/**
		* The current set of user whitelisted apps for device idle mode, meaning these are allowed
		* to freely schedule alarms.
		@@ -960,6 +978,25 @@ class AlarmManagerService extends SystemService {
		}
		}

		// Determine SysUI's uid
		final PackageManager packMan = getContext().getPackageManager();
		try {
		PermissionInfo sysUiPerm = packMan.getPermissionInfo(SYSTEM_UI_SELF_PERMISSION, 0);
		ApplicationInfo sysUi = packMan.getApplicationInfo(sysUiPerm.packageName, 0);
		if ((sysUi.privateFlags&ApplicationInfo.PRIVATE_FLAG_PRIVILEGED) != 0) {
		mSystemUiUid = sysUi.uid;
		} else {
		Slog.e(TAG, "SysUI permission " + SYSTEM_UI_SELF_PERMISSION
		+ " defined by non-privileged app " + sysUi.packageName
		+ " - ignoring");
		}
		} catch (NameNotFoundException e) {
		}

		if (mSystemUiUid <= 0) {
		Slog.wtf(TAG, "SysUI package not found!");
		}

		PowerManager pm = (PowerManager) getContext().getSystemService(Context.POWER_SERVICE);
		mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "alarm");

		@@ -1328,6 +1365,7 @@ class AlarmManagerService extends SystemService {
		// This means we will allow these alarms to go off as normal even while idle, with no
		// timing restrictions.
		} else if (workSource == null && (callingUid < Process.FIRST_APPLICATION_UID
		\|\| callingUid == mSystemUiUid
		\|\| Arrays.binarySearch(mDeviceIdleUserWhitelist,
		UserHandle.getAppId(callingUid)) >= 0)) {
		flags \|= AlarmManager.FLAG_ALLOW_WHILE_IDLE_UNRESTRICTED;