run-cpu-stress.sh fails when no logfilename is passed.

.pistressrc

@@ -1,4 +1,6 @@
+if [ -z ${PISTRESS_HOME} ]; then
   export PISTRESS_HOME=/home/pi/git/pistress
+fi
 export THERMAL_ZONE=/sys/class/thermal/thermal_zone0/temp
 
 export FIO_NUMJOBS=$(nproc)

README.md

@@ -1,5 +1,15 @@
 # pistress
 
-A bunch of scripts for measuring the core temperature of the Raspberry Pi 5 CPU under full load
+A bunch of scripts for measuring the core temperature of  any single board computer's CPU under full load
 and plotting graphs .
-Requirements: fio, gnuplot
+
+== Installation ==
+
+sudo apt install -y fio gnuplot
+cp .pistressrc ~
+
+Edit ~/.pistressrc and canfigure values for your needs.
+
+== Licence ==
+
+Licenced under MIT Licence See file LICENCE

bin/run-cpu-stress.sh

@@ -10,6 +10,11 @@ else
  export THERMAL_ZONE=/sys/class/thermal/thermal_zone0/temp
 fi
 
+if [ -z "${1}" ]; then
+  echo "usage run-cpu-stress.sh <logfile>"
+  exit 1
+fi
+
 measure_temp.sh > ${1} &
 TPID=$!
 fio ${PISTRESS_HOME}/fio/fio_cpu