Re: [Expectperl-discuss] Threading on top of IO::Tty seems to work

[Roland G. <rgi...@cp...>]

On 7/16/07, Bryan Bueter <br...@bu...> wrote:
> I persued Net::SSH2 over a year ago for just this purpose.  You can read
> the thread I had with the author here:
>
> http://sourceforge.net/mailarchive/message.php?msg_id=200601192208.43932.dbrobins%40cpan.org
>
> Basically David Robins stated this:
>
> Ah, then there's the problem. Fileno tries to get a real Unix filehandle out
> of the object; since it isn't a real Unix file, you won't get one.
>
> I could not get it to work, and David seemed to think that it should not
> work.  In that thread there is very simple code that I wrote and even that
> doesnt work.

I think all that would be needed is that Net::SSH2::Channel returns
the fileno of the socket connection. Expect needs a real fileno to do
a select() on it, but everything else is done via the object.

Ideally, Net::SSH2 should be rewritten as an I/O filter ala
PerlIO::gzip. Well, one may dream... :-)

> However, all that aside, even without using Expect, Net::SSH2 was not
> thread safe.  I sent emails regarding that as well, to no avail.  At this
> point in time, I really think Expect on top of a spawned ssh command is
> the best way to do things (from a perl perspective).

I browsed through the source and didn't notice anything obvious that
could hinder thread-usage. Can you remember what it was that was not
thread-safe?

Yeah, let's stick to ssh for now, nothing wrong with that. But please,
people, remember to not use password-authentication...

Best regards, Roland