progress.sh

MAX=`echo "\`tput cols\` - 20" | bc`

PROGRESS() {
  PRG=`echo "$1 * 100 / $2" | bc`
  CUR=`echo "$MAX * $PRG / 100" | bc -l | cut -d'.' -f1`
  STR='['
  for i in `seq 1 $MAX`; do
    if [[ $i -le $CUR ]]; then STR="$STR="; else STR="$STR "; fi
  done
  echo "$STR] $PRG%\r\c" >&2
}

echo
for i in {1..200}; do
  PROGRESS $i 200
done
echo