-echo " checking that it runs... " >>$LOG
-test -f zebrasrv.pid || sleep 5 || test -f zebrasrv.pid || exit 1
-PID=`cat zebrasrv.pid`
-ps -p $PID | grep $PID >/dev/null || exit 1
+
+echo " checking that it runs..." >>$LOG
+test -f z.pid || exit 1
+
+PID=`cat z.pid`
+echo " checking that it still runs..." >>$LOG
+kill -CHLD $PID >/dev/null 2>&1 || exit 1