From: Greg Millam <walker@...>
Date: 2004-07-29T23:07:53+09:00
Subject: Re: IO issues: forking, select, and duplexing

Hal Fulton wrote:
>> If your IO-like object contains a reference to a real IO object that
>> can be a target of select, you can call select on the IO-like object
>> by just adding "to_io" method that returns real IO object.
> 
> That is very interesting. I don't think I can do this easily (as the
> code is from a third party), but I'll look at it.
> 
>> |So I thought: Well, I'll fork a TCPServer.
>>
>> If you really need full duplex IO object using fork, how about using
>> "open" instead of TCPServer:
>>
>>   open("|-", "w+") do
>>      # the code to copy from STDIN to IO-like
>>      # and from IO-like to STDOUT
>>   end

May I suggest Socket.pair ?

sockets = Socket.pair(Socket::AF_UNIX, Socket::SOCK_STREAM, 0)

sockets[0].puts "hello"
sockets[1].gets #=> "hello\n"

- Greg Millam