+if [ -z "${HOSTFILE}" ] ; then
+ echo "No hostfile specified."
+ usage
+ exit 1
+fi
+
+# Don't use wc -l to compute it to avoid issues with trailing \n at EOF
+hostfile_procs=`grep -c [a-zA-Z0-9] $HOSTFILE`
+
+if [ -z "${NUMPROCS}" ] ; then
+ # Use the amount of processes in the hostfile as default value for the -np parameter
+ NUMPROCS=$hostfile_procs
+fi