Bash random

rand.sh

rseed=42
random=0

function generate_random {
  if [[ $rseed == 0 ]]; then
    rseed=123459876
  fi

  h=$(($rseed / 127773))
  l=$(($rseed % 127773))

  rseed=$((16807 * $l - 2836 * $h))

  if [[ $rseed < 0 ]]; then
    rseed=$(($rseed + 0x7fffffff))
  fi

  random=$(($rseed & 32767))
}

generate_random

echo $random

generate_random

echo $random