Getting the terminal size in Ruby

termsize.rb

# via http://www.megasolutions.net/ruby/Getting-the-size-of-the-terminal-in-a-portable-way-26006.aspx
TIOCGWINSZ = 0x40087468 

def get_winsize
  str = [0, 0, 0, 0].pack('SSSS') 
  if STDIN.ioctl(TIOCGWINSZ, str) >= 0 
    rows, cols, xpixels, ypixels = str.unpack("SSSS") 
    p rows, cols, xpixels, ypixels 
  else 
    puts "Unable to get window size" 
  end 
end