# File lib/railsbench/perf_utils.rb, line 41
  def self.open_or_die(filename, &block)
    filename = filename.sub(/^\/([cdefgh])(\/)/, '\1:\2') if RUBY_PLATFORM =~ /win32/
    begin
      if stat(filename).readable?
        open(filename, &block)
      else
        die "file #{filename} is unreadable"
      end
    rescue
      die "file #{filename} does not exist"
    end
  end