--- mcore-src/trunk/mcore-tools/src/include/register.global.class.in	2015/09/03 12:15:13	2431
+++ mcore-src/trunk/mcore-tools/src/include/register.global.class.in	2015/09/03 12:29:41	2433
@@ -22,7 +22,13 @@
 			serial=$(mysqldo "insert into client_serials (mtime, mac) values('${mtime}','${mac_address}'); select last_insert_id();")
 	fi
 
-	echo "serial='${serial}'"
+	if [[ -z ${serial} ]]
+	then
+		return 1
+	else
+		echo "serial='${serial}'"
+		return 0
+	fi
 }
 
 register_client()
@@ -43,4 +49,5 @@
 	echo "DEBUG: mac_address='${mac_address}'"
 
 	echo "register '${mac_address}'"
+	nsslsay_fingerprint "register '${mac_address}'"
 }