#!/bin/bash -e i=1 while [ 0 ]; do echo "*** $i `date`" if [ -f random-2 ]; then mv random-2 random-2-last fi ./random_test --log_level=message 2> random-2 echo "*** $i `date`" echo if [ "$1" = "-c" ]; then sleep 2 else break fi i=$[i + 1] done