#!/bin/bash

if [ "$#" -ne "1" ]
then
  echo "I need one argument and one argument only: Number of threads to start."
  echo "Hint: You have $(nproc) CPU cores."
  exit 1
fi

if [[ "$1" =~ ^[0-9]+$ ]]
then
  n="$1"
else
  echo "Argument needs to be a number: Number of threads to start."
  echo "Hint: You have $(nproc) CPU cores."
  exit 1
fi

trap "pkill -P $$; exit 0" SIGHUP SIGINT SIGTERM

while [ "$n" -gt 1 ]
do
  while true; do true; done &
  n=$((n-1))
done
echo "Started $1 threads to burn your CPU."
pidof -x "$(basename -- $0)"
while true; do true; done
#sleep infinity