Minor code refactoring

lib/core/common.py

@@ -503,6 +503,22 @@ class Backend:
 
         return kb.os
 
+    @staticmethod
+    def setOsVersion(version):
+        if version is None:
+            return None
+
+        elif kb.osVersion is None and isinstance(version, basestring):
+            kb.osVersion = version
+
+    @staticmethod
+    def setOsServicePack(sp):
+        if version is None:
+            return None
+
+        elif kb.osSP is None and isinstance(version, int):
+            kb.osSP = version
+
     @staticmethod
     def setArch():
         msg = "what is the back-end database management system architecture?"
@@ -585,6 +601,14 @@ class Backend:
     def getOs():
         return kb.os
 
+    @staticmethod
+    def getOsVersion():
+        return kb.osVersion
+
+    @staticmethod
+    def getOsServicePack():
+        return kb.osSP
+
     @staticmethod
     def getArch():
         if kb.arch is None: