flow control

xCAT/postscripts/xcatflowrequest

@@ -0,0 +1,31 @@
+#!/bin/bash
+# IBM(c) 2013  EPL license http://www.eclipse.org/legal/epl-v10.html
+# This routine when called, contacts xcatd.  It will return to the caller when xcatd is
+# ready to process the request
+# It is called by xcatdsklspost before calling getpostscripts.awk
+# it is called by remoteshell before calling getcredentials.awk
+#
+exec 13<>/dev/udp/$1/$2
+echo "resourcerequest: xcatd" >&13
+parpid=$$
+touch /tmp/goahead.$parpid
+touch /tmp/killme.$parpid
+exec 2> /dev/null
+while ! grep 'resourcerequest: ok' /tmp/goahead.$parpid > /dev/null; do
+	(
+      echo "resourcerequest: xcatd" >&13
+      exec 14<>/proc/self/stat
+      read mystat<&14
+      mypid=$(echo $mystat|cut -d " " -f 4)
+	  (sleep $(((RANDOM%60)+120)).$((RANDOM%50)); if [ -f /tmp/killme.$parpid ]; then kill -TERM $mypid; fi) &
+      echo $! > /tmp/sleeperpid.$parpid
+	  exec awk '{print $0 > "/tmp/goahead.'$parpid'";exit}' <&13
+	)	
+done
+sleeper=$(cat /tmp/sleeperpid.$parpid)
+sleeper=$(ps -ef|awk "\$3==$sleeper"|awk '{print $2}')
+kill -TERM $sleeper
+rm /tmp/goahead.$parpid
+rm /tmp/sleeperpid.$parpid
+rm /tmp/killme.$parpid
+