Merge "Disable bmgr if BMS is not running"

cmds/bmgr/src/com/android/commands/bmgr/Bmgr.java

@@ -71,9 +71,7 @@ public final class Bmgr {
             return;
         }
 
-        mBmgr = IBackupManager.Stub.asInterface(ServiceManager.getService("backup"));
-        if (mBmgr == null) {
-            System.err.println(BMGR_NOT_RUNNING_ERR);
+        if (!isBmgrActive()) {
             return;
         }
 
@@ -150,6 +148,27 @@ public final class Bmgr {
         showUsage();
     }
 
+    private boolean isBmgrActive() {
+        mBmgr = IBackupManager.Stub.asInterface(ServiceManager.getService("backup"));
+        if (mBmgr == null) {
+            System.err.println(BMGR_NOT_RUNNING_ERR);
+            return false;
+        }
+
+        try {
+            if (!mBmgr.isBackupServiceActive(UserHandle.USER_SYSTEM)) {
+                System.err.println(BMGR_NOT_RUNNING_ERR);
+                return false;
+            }
+        } catch (RemoteException e) {
+            System.err.println(e.toString());
+            System.err.println(BMGR_NOT_RUNNING_ERR);
+            return false;
+        }
+
+        return true;
+    }
+
     private String enableToString(boolean enabled) {
         return enabled ? "enabled" : "disabled";
     }