From: Nathan Halterman <scoobycoder@...>
Date: 2008-11-06T23:57:35+09:00
Subject: Re: Trying to Use "request_pty" Channel Never Closes

Thanks Hugh,

I'm not sure how to do an echo command with Ruby SSH while in a console 
application.  The first thing I should see is a text based menu.

I am unable to get anything from stdout it seems.  When I do the same 
SSH manually from outside of Ruby, I do get the menu to come up. 
Additionally when I just do a straight session.exec command to connect 
to the server and send something, what I send doesn't matter, I can see 
the menu.  This means to me that something is being sent back through 
stdout, but I can't get it with the code below.

So this piece of code never seems to send me back anything.

[code]

        channel.on_data do |ch, data|
          puts "got data: #{data.inspect}"
        end

[/code]

Thanks Again,

Nathan

Hugh Sasse wrote:
> On Wed, 5 Nov 2008, Nathan Halterman wrote:
> 
>> OOOOOkaaaaay. :)
>> 
>> So it turns out that it was a timing issue.  I was sending the 
>> channel.on_data too fast for the UI to process.  I added in some sleep 
>> statements and it worked.
> 
> Pardon the spurious + in my previous example, I started to write it in
> the style of a patch to make it clear what I had changed, then thought
> that would actually make it more obscure!
> 
> I'm not familiar with Net::ssh, but I suspect there will be a way to 
> read
> from the remote machine as well as write to it.  I'd recommend, that if
> you have echoing on (you can see what you type) that you try to read 
> back
> what you sent. That way you will have less dependence on "magic" timing
> numbers, though you will have to be careful how you match what you get 
> back,
> as is the case when you use Expect.  If the system gets loaded and you 
> have
> to wait for the echo, then that's still OK.
>> 
>> Thanks a ton! :)
>> -- 
>> Posted via http://www.ruby-forum.com/.
>> 
> 
>         Hugh

-- 
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