Assume that which and dirname are found in PATH, don't harcode your custom PATH.

--- utils/opcontrol.orig	2011-12-16 16:32:00.405576367 +0100
+++ utils/opcontrol	2011-12-16 16:32:25.755959905 +0100
@@ -2156,8 +2156,8 @@ help_start_daemon_with_ibs()
 # determine the location of opcontrol and related programs
 if test -z "$OPDIR"; then
 	BINDIR="/usr/bin"
-	OPCONTROL=`$BINDIR/which $0`
-	OPDIR=`$BINDIR/dirname $OPCONTROL`
+	OPCONTROL=`which $0`
+	OPDIR=`dirname $OPCONTROL`
 fi
 
 PATH=$OPDIR:/usr/local/bin:/usr/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin