--- /etc/init.d/apache2.orig	2011-11-19 15:24:52.534876326 +0800
+++ /etc/init.d/apache2	2011-11-19 15:24:37.184953058 +0800
@@ -102,7 +102,7 @@
 	${APACHE2} ${APACHE2_OPTS} -k stop
 
 	i=0
-	while ( ! test -f "${PIDFILE}" && pgrep -P ${PID} apache2 >/dev/null ) \
+	while ( test -f "${PIDFILE}" && pgrep -P ${PID} apache2 >/dev/null ) \
 		&& [ $i -lt ${TIMEOUT} ]; do
 		sleep 1 && i=$(expr $i + 1)
 	done