I just wrote a small utility to pull Mac addresses verses port numbers from our switches and found that the telnet.cmd strings yielded to the block, were out of synch with the commands. It took me a while to track it down to the telnet.cmd method of net/telnet.rb adding a "\n" to the command, The network switch was expecting just a single key stroke, which is common in text based menu driven interfaces. The result being that the "\n" caused the switch to resend to last menu, and I was getting two prompts for command I sent. Hence the wait method got a command out of synch, for every command I executed.
I fixed this with a hack to the net/telnet.rb library, which may be useful to others.
This is the whole rewritten cmd method.
def cmd(options) # :yield: recvdata
match = @options["Prompt"]
time_out = @options["Timeout"]
if options.kind_of?(Hash)
string = options["String"]
match = options["Match"] if options.has_key?("Match")
time_out = options["Timeout"] if options.has_key?("Timeout")
no_nl = options["NoNL"] if options.has_key?("NoNL") ############# >>>>>>>>>>>ADDED THIS LINE
else
string = options
end
########### >>>>>>>>>>>REPLACED self.puts(string) with this "if" statement.
if no_nl
self.print(string)
else
self.puts(string)
end
if block_given?
waitfor({"Prompt" => match, "Timeout" => time_out}){|c| yield c }
else
waitfor({"Prompt" => match, "Timeout" => time_out})
end
end
Rob
Rob Burrowes Ph: +64 (9) 3737 599 Extn 87972
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