How to catch SIGINT and SIGTERM signals in Ruby

signal_catching.rb

# Signal catching
def shut_down
  puts "\nShutting down gracefully..."
  sleep 1
end

puts "I have PID #{Process.pid}"

# Trap ^C 
Signal.trap("INT") { 
  shut_down 
  exit
}

# Trap `Kill `
Signal.trap("TERM") {
  shut_down
  exit
}

Really cool. You can utilize Ruby's catch-throw, if you want to trap the signal and just continue, as if you have rescued it.

Signal.trap('INT') { throw :sigint }

catch :sigint
    do_stuff_that_may_be_interrupted
end
puts 'Just caught a SIGINT'