--- a
+++ b/src/filters/injectcommon.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+fatal()
+{
+    echo $*
+    exit 1
+}
+
+commoncode=recfiltcommon
+test -f recfiltcommon || fatal must be executed inside the filters directory
+
+for filter in rcl* ; do 
+sed -e '/^#RECFILTCOMMONCODE/r recfiltcommon
+/^#RECFILTCOMMONCODE/,/^#ENDRECFILTCOMMONCODE/d
+' < $filter > filtertmp && mv -f filtertmp $filter && chmod a+x $filter
+done