resize_trap.rb

#!/usr/bin/env ruby
$count = 0

def out *args
  # During resizing events, terminals may not do a carriage return 
  # on their own, so we have to explicitly insert it
  print "#{args.join ' '}\r\n"
end

command = lambda { |x|
  out "trapped #{$count}"

  if $count <= 0 then
    $count += 1

    out "IM NUMBER #{$count}!!"
    resizing = true
    while resizing do
      sleep 2
      print "[#{$count}]"

      resizing = false if $count <= 1
    end

    out "STUFF HAPPENED!!"
  else
    $count += 1
  end

  sleep 1
  $count -= 1
  out "done #{$count}"
}

Signal.trap 'SIGWINCH', command

loop do
  sleep 1
end