From: Prasad Pednekar <prasadp@...>
Date: 2008-06-02T21:11:05+09:00
Subject: Re: Usin net/ssh library

John Maclean wrote:
> On Sun, 1 Jun 2008 18:23:25 +0900
> Prasad Pednekar <prasadp@gslab.com> wrote:
> 
>> but
>> in my case after running the script it goes directly to the shell prompt
>> "$" by-passing the cli prompt.
>> 
>> a. Why does this behaviour take place??
>> 
>> b. Is there a way to go to the initial cli prompt ??
>> 
>> 
>> -P
> 
> From `ri Net::SSH`
> 
>        Net::SSH.start("host", "user", :password => "password") do |ssh|
>          result = ssh.exec!("ls -l")
>          puts result
>        end
> 
> 
> Sample of my own stuff...
> require 'rubygems'
> require 'net/ssh'
> 
> server = "acid"
> user = "jayeola"
> Net::SSH.start(server, user) do |x|
>   cmd2 = x.exec!("test -d /proc && echo \"OK\"").strip
>   p cmd2
>   if cmd2 != "OK"
>     p "no proc found"
>   else
>     p "got proc"
>   end
> 
>   cmd3 = x.exec!("test -f /proc/partitions && echo \"OK\"")
>   cmd4 = x.exec!("test -f /proc/diskstats && echo \"OK\"")
> end
> 
> 
> I'm using this library and it doesn't give me a prompt at all but runs
> the code as required. How are you using it?


Hi John,
         I am using it the same way as you are using. The problem lies 
when the initial prompt that is needed gets by-passed when I use the 
net/ssh module. I have been usng the net/telnet module initially, where 
I get the appropriate prompt on logging in. ie. ">>>". and the shell 
prompt is "$" which arises when i do a "!" on the initial prompt.

Telnet works fine, but i am exercising the usage of connecting to the 
box thru ssh. So here it by-passes the initial prompt which telnet 
module does not.

As telnet looks for a given prompt while logging in, does ssh have such 
a prompt?

Also I guess the net/ssh module in ruby creates a instance of the shell 
and executed the commands to be executed on that shell rather than 
connecting to the actual machine.

- P

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