--- spawn-fcgi.orig	2009-03-02 02:34:24.570010541 +0100
+++ spawn-fcgi	2009-03-02 02:45:39.241943213 +0100
@@ -24,6 +24,12 @@
 		eerror
 		return 1
 	fi
+	if [[ ! -z "${FCGI_SOCKET}" ]] && [[ ! -z "${FCGI_PORT}" ]]; then
+		eerror "Only one of both must be defined:"
+		eerror "  FCGI_SOCKET=${FCGI_SOCKET}"
+		eerror "  FCGI_PORT=${FCGI_PORT}"
+		return 1
+	fi
 
 	local X E OPTIONS SOCKET_OPTION PORT_OPTION RETVAL