Progress bar (dots...) on operations execution

progress.sh

#
# Utilities
#
dot_progress() {
  while true
  do
    echo -n "."
    sleep 2
  done
}

start_progress() {
  dot_progress &
  PROGRESS=$!
}

stop_progress(){
  disown $PROGRESS             # disown the PROGRESS process for suppressing system "Terminated output"
  kill $PROGRESS &> /dev/null  # Suppress output
}

#
# Use case
#

echo -n "Do something for a long time"

start_progress

# A job spending time start 
sleep 10
echo "done"
# Job end

stop_progress


######
# output:
# Do something for a long time......done