BASH random integer function using /dev/urandom

rand_int.sh

function rand_int {
  local min=$1
  local max=$2

  #   dd if=/dev/urandom bs=1 count=1   <-- grab a single 1-byte frame from /dev/urandom
  # | od -An -vtu1                      <-- convert raw-binary to a decimal
  # | tr -d ' ' | tr -d "\n"`           <-- trim spaces and line-breaks from output of od (gotta be better way)
  local randByte=`dd if=/dev/urandom bs=1 count=1 2> /dev/null | od -An -vtu1 | tr -d ' ' | tr -d "\n"`

  # printf "%.0f" <-- prints a float with zero decimal places
  # `
  #     echo "$min + ($randByte/256) * ($max - $min)" <-- sane-looking mathematical expression
  #   | bc -l                                         <-- bc executes the maths (-l for float precision)
  # `
  printf "%.0f" `echo "$min + ($randByte/256) * ($max - $min)" | bc -l`
}