#! /bin/bash
#
#  until loop example - until is very similar to while (any until loop
#  can be easily converted to a while loop)
#
# this script will attempt to copy the first argument to the second argument
# and will keep trying every 3 seconds until it succeeds
#
# read it as "Do statements until command runs correctly"
#
#  until command; do
#         statements...
#  done
#


until cp $1 $2 2> /dev/null ; do 
	echo "Attempt to copy failed. waiting...  (hit Control-C to exit)"
	sleep 3
done