gistfile1.rb

# THIS SHOULD NOT BE
require 'readline'
# For whatever reason, loading libreadline.so *without* loading Ruby's
# readline first makes FFI die?  Seriously, comment out the above require and
# watch it fail.

require 'rubygems'
require 'ffi'

module RL
    extend FFI::Library
    ffi_lib 'readline'
    attach_function :readline, [:string], :pointer
    attach_function :free, [:pointer], :void
end 
    
while((line = RL.readline('>  '); !line.address.zero?))
    puts "Got #{line.inspect} #{line.address.inspect}"
    puts RL.free(line).inspect
end