Add shutdown assurance
If something kills system_server before it completes its shutdown
action, the runtime will just restart giving the illusion that a reboot
for an OTA or something else has happened.
To prevent this, write a system property containing the reboot reason
before initiating the shutdown with all the services. If the
system_server is killed before it completes, the next time the main
thread of system_server starts up, it will immediately execute the
shutdown action.
Bug: 3022556
Change-Id: I81723bac333430f04205e7a7b799914d96f170eb
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index 26071ae..a2a5e67 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -17,6 +17,7 @@
package com.android.server;
import com.android.server.am.ActivityManagerService;
+import com.android.internal.app.ShutdownThread;
import com.android.internal.os.BinderInternal;
import com.android.internal.os.SamplingProfilerIntegration;
import com.trustedlogic.trustednfc.android.server.NfcService;
@@ -89,6 +90,24 @@
BinderInternal.disableBackgroundScheduling(true);
android.os.Process.setCanSelfBackground(false);
+ // Check whether we failed to shut down last time we tried.
+ {
+ final String shutdownAction = SystemProperties.get(
+ ShutdownThread.SHUTDOWN_ACTION_PROPERTY, "");
+ if (shutdownAction != null && shutdownAction.length() > 0) {
+ boolean reboot = (shutdownAction.charAt(0) == '1');
+
+ final String reason;
+ if (shutdownAction.length() > 1) {
+ reason = shutdownAction.substring(1, shutdownAction.length());
+ } else {
+ reason = null;
+ }
+
+ ShutdownThread.rebootOrShutdown(reboot, reason);
+ }
+ }
+
String factoryTestStr = SystemProperties.get("ro.factorytest");
int factoryTest = "".equals(factoryTestStr) ? SystemServer.FACTORY_TEST_OFF
: Integer.parseInt(factoryTestStr);