[nsd-users] make nsdc more reliable for restart

[Alf Schlichting]

Hello,

while running nsd as a secondary nameserver with +1000
domains we discovered that the default nsdc(8) was
not able to reliable restart nsd.
Reason I think is that, by using the PID file, it sends
it's signal to only 1 of the default 3 processes.
Afterwards it only checks against this 1 process while 
the other 2 still may be running causing trouble on
start up.

The patch below fixes it for us (was tested in a lab
environment with 10.000 domains).

Alf


--- usr.sbin/nsd/nsdc.sh.in.orig	Fri Aug 10 09:37:33 2012
+++ usr.sbin/nsd/nsdc.sh.in	Fri Aug 10 09:34:56 2012
@@ -188,18 +188,18 @@
 	try=1
 
 	while [ $try -ne 0 ]; do
-		if [ ${try} -gt 50 ]; then
+		if [ ${try} -gt 60 ]; then
 			echo "nsdc stop failed"
 			return 1
 		else
 			if [ $try -eq 1 ]; then
 				kill -TERM ${pid}
 			else
-				kill -TERM ${pid} >/dev/null 2>&1
+				pkill -TERM nsd >/dev/null 2>&1
 			fi
 
 			# really stopped?
-			kill -0 ${pid} >/dev/null 2>&1
+			pkill -0 nsd >/dev/null 2>&1
 			if [ $? -eq 0 ]; then
 				controlled_sleep ${try}
 				try=`expr ${try} + 1`