From 50a21f4d3b70360b36acad20e234c380654fd59f Mon Sep 17 00:00:00 2001
From: Doug Zongker <dougz@android.com>
Date: Thu, 19 Nov 2009 12:49:53 -0800
Subject: [PATCH] add reboot() method to PowerManager

In order to unbundle System Update, we need some to expose in the SDK
some way to reboot the device into recovery.  Add a reboot() method to
PowerManager, protected by the android.permission.REBOOT permission.
---
 api/current.xml                                 | 13 +++++++++++++
 core/java/android/os/IPowerManager.aidl         |  1 +
 core/java/android/os/PowerManager.java          | 17 ++++++++++++++++-
 core/res/AndroidManifest.xml                    |  4 ++--
 .../com/android/server/PowerManagerService.java | 15 +++++++++++++++
 5 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/api/current.xml b/api/current.xml
index 3d4c492e83687..bf6d64f65ad84 100644
--- a/api/current.xml
+++ b/api/current.xml
@@ -106250,6 +106250,19 @@
 <parameter name="tag" type="java.lang.String">
 </parameter>
 </method>
+<method name="reboot"
+ return="void"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="reason" type="java.lang.String">
+</parameter>
+</method>
 <method name="userActivity"
  return="void"
  abstract="false"
diff --git a/core/java/android/os/IPowerManager.aidl b/core/java/android/os/IPowerManager.aidl
index b9dc860a9e478..022986466d61d 100644
--- a/core/java/android/os/IPowerManager.aidl
+++ b/core/java/android/os/IPowerManager.aidl
@@ -32,6 +32,7 @@ interface IPowerManager
     void preventScreenOn(boolean prevent);
     void setScreenBrightnessOverride(int brightness);
     boolean isScreenOn();
+    void reboot(String reason);
 
     // sets the brightness of the backlights (screen, keyboard, button) 0-255
     void setBacklightBrightness(int brightness);
diff --git a/core/java/android/os/PowerManager.java b/core/java/android/os/PowerManager.java
index 4b3b6f6dc7716..ffdb27c9a2b7b 100644
--- a/core/java/android/os/PowerManager.java
+++ b/core/java/android/os/PowerManager.java
@@ -465,6 +465,22 @@ public class PowerManager
         }
     }
 
+    /**
+     * Reboot the device.  Will not return if the reboot is
+     * successful.  Requires the {@link android.Manifest#REBOOT}
+     * permission.
+     *
+     * @param reason code to pass to the kernel (e.g., "recovery") to
+     *               request special boot modes, or null.
+     */
+    public void reboot(String reason)
+    {
+        try {
+            mService.reboot(reason);
+        } catch (RemoteException e) {
+        }
+    }
+
     private PowerManager()
     {
     }
@@ -488,4 +504,3 @@ public class PowerManager
     IPowerManager mService;
     Handler mHandler;
 }
-
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 22716b8628222..80474362cfe0c 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -943,7 +943,7 @@
     <permission android:name="android.permission.DELETE_CACHE_FILES"
         android:label="@string/permlab_deleteCacheFiles"
         android:description="@string/permdesc_deleteCacheFiles"
-        android:protectionLevel="signature" />
+        android:protectionLevel="signatureOrSystem" />
 
     <!-- Allows an application to delete packages. -->
     <permission android:name="android.permission.DELETE_PACKAGES"
@@ -981,7 +981,7 @@
     <permission android:name="android.permission.REBOOT"
         android:label="@string/permlab_reboot"
         android:description="@string/permdesc_reboot"
-        android:protectionLevel="signature" />
+        android:protectionLevel="signatureOrSystem" />
 
    <!-- Allows low-level access to power management -->
     <permission android:name="android.permission.DEVICE_POWER"
diff --git a/services/java/com/android/server/PowerManagerService.java b/services/java/com/android/server/PowerManagerService.java
index 444c8de127488..0e22f863d4b9c 100644
--- a/services/java/com/android/server/PowerManagerService.java
+++ b/services/java/com/android/server/PowerManagerService.java
@@ -59,6 +59,7 @@ import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
 import static android.provider.Settings.System.STAY_ON_WHILE_PLUGGED_IN;
 
 import java.io.FileDescriptor;
+import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -2090,6 +2091,20 @@ class PowerManagerService extends IPowerManager.Stub
         }
     }
     
+    /**
+     * Reboot the device immediately, passing 'reason' (may be null)
+     * to the underlying __reboot system call.  Should not return.
+     */
+    public void reboot(String reason)
+    {
+        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.REBOOT, null);
+        try {
+            Power.reboot(reason);
+        } catch (IOException e) {
+            Log.e(TAG, "reboot failed", e);
+        }
+    }
+
     /**
      * Returns the time the screen has been on since boot, in millis.
      * @return screen on time