clockspeed: fixed clockctl.sh to check if clockspeed's adjust fifo is there before trying to write clock marks

network/clockspeed/clockctl.sh

@@ -3,7 +3,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../clockspeed/clockctl.sh
-# Copyright (C) 2008 - 2010 The OpenSDE Project
+# Copyright (C) 2008 - 2011 The OpenSDE Project
 #
 # More information can be found in the files COPYING and README.
 #
@@ -51,8 +51,12 @@ case "$1" in
 		D_bindir/clockview < /var/state/clockspeed/atto
 		;;
 	m|mark)
-		echo "Obtaining new calibration mark from master server at ${CLOCK_IP}:"
-		clock_pick | tee /var/state/clockspeed/adjust | D_bindir/clockview
+		if [ ! -p /var/state/clockspeed/adjust ]; then
+			echo "Cannot obtain new calibration mark (clockspeed running?)"
+		else
+			echo "Obtaining new calibration mark from master server at ${CLOCK_IP}:"
+			clock_pick | tee /var/state/clockspeed/adjust | D_bindir/clockview
+		fi
 		;;
 	s|sync)
 		echo "Setting system clock with master server at ${CLOCK_IP}:"