Tramp login failure on Mac OS X

Tramp login failure on Mac OS X

[Matthew Calhoun]

Hello,

I'm attempting to use Tramp in Carbon Emacs, version 21.3.50.1, without 
much success. I normally use either ssh or sftp to access files on the 
machine, so first I tried setting tramp-default-method to ssh.  I got 
messages that said "Waiting 60s for prompt from remote shell" and then 
"Login failed." In the list archives I found a suggestion to use sshx, 
but that didn't work either:

tramp: Opening connection for matt@www.example.com using sshx...
tramp: Waiting for prompts from remote shell
tramp: Waiting 60s for prompt from remote shell
tramp-process-actions: Login failed

It's quite possible that I'm doing something wrong. I have:

	(require 'tramp)
	(setq tramp-default-method "sshx")

in my .emacs, and I'm trying to edit a file by doing something like:

	C-x C-f /matt@www.example.com:file.txt

If I understand correctly, I should see a password prompt in the 
minibuffer shortly after typing the above and hitting return. I'm 
stumped. Does anyone see what the problem might be?

Thanks,
Matt

Re: Tramp login failure on Mac OS X

[Matthew Calhoun]

I saw a reference to that setting in the archives, but it seemed to 
indicate that bad things could happen as a result of setting 
process-connection-type to t on OS X. I didn't fully understand the 
documentation for process-connection-type, so I left it alone.

I tried it just now, and now Tramp does indeed work. Very nice, if a 
bit slow. Is this solution likely to cause other problems, though?

Thanks,
Matt


El Sunday, 26 October, 2003, a las 05:48  PM, Gilbert Harman escribió:

> Using a similar set-up to yours,
> I found I needed to have the following in my .emacs
>
> (setq process-connection-type t)
>
> My .emacs does not contain either of the lines you have.
>
>   Gil
>
> On 10/26/03 7:23 PM, "Matthew Calhoun" <calhounm@mac.com> wrote:
>
>> It's quite possible that I'm doing something wrong. I have:
>>
>> (require 'tramp)
>> (setq tramp-default-method "sshx")
>>
>> in my .emacs, and I'm trying to edit a file by doing something like:
>>
>> C-x C-f /matt@www.example.com:file.txt
>

Re: Tramp login failure on Mac OS X

[Piet van Oostrum]

>>>>> Matthew Calhoun <calhounm@mac.com> (MC) wrote:

MC> I saw a reference to that setting in the archives, but it seemed to
MC> indicate that bad things could happen as a result of setting
MC> process-connection-type to t on OS X. I didn't fully understand the
MC> documentation for process-connection-type, so I left it alone.

MC> I tried it just now, and now Tramp does indeed work. Very nice, if a bit
MC> slow. Is this solution likely to cause other problems, though?

Setting process-connection-type to non-nil can make other things fail.
Especially it can cause subprocesses to lose some of their output. I have
experienced this with AUCTeX. So I have in my .emacs file:

(setq process-connection-type nil)

And this causes tramp to fail in the way you described.

I got around this with the following code:

(defadvice tramp-maybe-open-connection 
  (around set-process-connection-type)
  "Set process-connection-type to pty."
  (let ((process-connection-type 'pty))
    ad-do-it))
(ad-activate 'tramp-maybe-open-connection)

-- 
Piet van Oostrum <piet@cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP]
Private email: P.van.Oostrum@hccnet.nl

Re: Tramp login failure on Mac OS X

[Stefan Monnier]

> (defadvice tramp-maybe-open-connection 
>   (around set-process-connection-type)
>   "Set process-connection-type to pty."
>   (let ((process-connection-type 'pty))
>     ad-do-it))

Please report it as a bug in Tramp: it should not depend on the default
value of process-connection-type.


        Stefan

Re: Tramp login failure on Mac OS X

[Kai Grossjohann]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> (defadvice tramp-maybe-open-connection 
>>   (around set-process-connection-type)
>>   "Set process-connection-type to pty."
>>   (let ((process-connection-type 'pty))
>>     ad-do-it))
>
> Please report it as a bug in Tramp: it should not depend on the default
> value of process-connection-type.

I vaguely recall that this came up before.  Hmmmm...  I think there
are circumstances where it is bad to frob process-connection-type.  I
don't have time at the moment to grep the mailing list archives :-|

But introducing a variable tramp-process-connection-type could be
useful.

What do people think?

Kai