gistfile1.rb

list = {"HUP"=>1, "USR1"=>10, "USR2"=>12} 

list.each do |k,v|
  Signal.trap(k) do
    puts k
  end
end

while true
  puts ". "
  sleep 5
end

# kill -s HUP 24357
# kill -s USR1 24357
# kill -s USR2 24357