Ruby - See if a port is open

Question

I need a quick way to find out if a given port is open with Ruby. I currently am fiddling around with this:

require \'socket\'

def is_port_open?(ip, port)
          


        

Answer 1

Just for completeness, the Bash would be something like this:

$ netcat $HOST $PORT -w 1 -q 0 </dev/null && do_something

-w 1 specifies a timeout of 1 second, and -q 0 says that, when connected, close the connection as soon as stdin gives EOF (which /dev/null will do straight away).

Bash also has its own built-in TCP/UDP services, but they are a compile-time option and I don't have a Bash compiled with them :P