Change the ruby process name in top

Question

I would like to change the name of the ruby process that gets displayed in the linux/unix top command. I have tried the

$0=\'miname\'

approach

Answer 1

From @jessehz answer, following code work perfect on my linux X86_64. Ruby 1.9.3, 2.0, 2.1, 2.2, 2.3 is tested.

1. It will change the output in ps top command.
2. It can be kill or signal with pkill, pgrep, killall.

Perfect!

def set_process_name_linux(name)
  handle = defined?(DL::Handle) ? DL::Handle : Fiddle::Handle

  Fiddle::Function.new(
    handle['prctl'.freeze], [
      Fiddle::TYPE_INT, Fiddle::TYPE_VOIDP,
      Fiddle::TYPE_LONG, Fiddle::TYPE_LONG,
      Fiddle::TYPE_LONG
    ], Fiddle::TYPE_INT
  ).call(15, name, 0, 0, 0)
  $PROGRAM_NAME = name
end
set_process_name_linux('dummy')