Shell Programming and Scripting

RESULT=""
sleep 30
while [ "${RESULT}" = "" ]; do
sleep 10
RESULT=`sed -n '/RUNNING/'p ${LOG_FILE_NEW}`
if [ "${RESULT}" = "" ]; then
RESULT=`sed -n '/SHUTTING_DOWN/'p ${LOG_FILE_NEW}`
fi
done
mv ${LOG_FILE_NEW} ${LOG_FILE}

-gt 0

RESULT=""
WRITE=0
sleep 30
while [ ${WRITE} = "0" ]; do
   sleep 10
   lsof ${LOG_FILE_NEW} > /dev/null 2>&1
   WRITE=$?
done
RESULT=`sed -n '/RUNNING/'p ${LOG_FILE_NEW}`
if [ "${RESULT}" = "" ]; then
   RESULT=`sed -n '/SHUTTING_DOWN/'p ${LOG_FILE_NEW}`
fi

mv ${LOG_FILE_NEW} ${LOG_FILE}

sed: can't read x_new.log: No such file or directory

${LOG_FILE_NEW}=x_new.log
${LOG_FILE}=some_log.log

[[ -a ${LOG_FILE_NEW} ]] && echo "Log file ${LOG_FILE_NEW} not found, exiting" && exit 1

while [[ true ]]
do
        [[ $(egrep -c "SHUTTING_DOWN|RUNNING" ${LOG_FILE_NEW}) -ne 0 ]] && break
        sleep 10
done
mv ${LOG_FILE_NEW} ${LOG_FILE}