#!/bin/bash

declare -a Spinner

Spinner=(/ - \\ \| / - \\ \| )
Spinnerpos=0

update_spinner()
{
    printf "\b"${Spinner[$Spinnerpos]}
    (( Spinnerpos=(Spinnerpos +1)%8 ))
}

printf " "

touch /tmp/spin_ctl

while [ 1 ];
do
	if [ -f /tmp/spin_ctl ] ; then
		update_spinner
	else
		exit
	fi
	sleep 1
done