A tiny bash function that causes dd to show status updates until it finishes.

ddinfo

#!/bin/bash
# Takes the pid of a dd process as an argument and loop-updates the status until it finishes
function ddinfo {
  kill -USR1 $1
  while :; do
    kill -0 $1 && { sleep 1m; kill -USR1 $1; } || { echo "DONE"; break; }
  done
}