Copy file (Ruby)

gistfile1.txt

#!/usr/bin/env ruby
from_file, to_file=ARGV
script = $0

puts "Copying from #{from_file} to #{to_file}"

input = File.open(from_file).input.read()

puts "The input file is #{input.length} bytes long"

puts "Does the output file exist? #{File.exists? to_file}"
puts "hit Control-C to abort, Return to continue"

astdin.gets
output = File.open(to_file, 'w')
output.write(input)

puts "finished"

output.close()
input.close()