From: Brian Candler <b.candler@...>
Date: 2010-01-27T16:40:58+09:00
Subject: Re: Problems with Telnet

Sean Warburton wrote:
> Thanks Brian, that was it, it was waiting for a full stop!

Remember that "Match"=>/./ means "match any single character";
"Match"=>/\./ means "match a full stop"

Looking at /usr/lib/ruby/1.8/net/telnet.rb on my system, I see that the 
default prompt is /[$%#>] \z/. That is, by default cmd() will collect 
response characters until it sees one of those four characters followed 
by a space and nothing else following (or until the far side 
disconnects, which is what was happening when you stuffed 'exit' into 
the command stream, or until a timeout occurs)

I haven't seen the protocol you're using, but maybe it isn't really 
telnet, it's just a raw TCP socket. In that case you could use 
TCPSocket.open(...) and the 'expect' library 
(/usr/lib/ruby/1.8/expect.rb on my system) to wait for responses.

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