initialize only on initial installation, of course

samhain/samhain.spec

@@ -113,5 +113,7 @@ AutoReqProv:  no
     rm -rf $RPM_BUILD_ROOT
 
 %post
-    $RPM_INSTALL_PREFIX/sbin/samhain -t init
+    if [ $1 -eq 1 ]; then
+        $RPM_INSTALL_PREFIX/sbin/samhain -t init
+    fi