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Re: specifying identity file for scp within tramp
From: |
Barry Margolin |
Subject: |
Re: specifying identity file for scp within tramp |
Date: |
Sun, 21 Dec 2008 11:00:26 -0500 |
User-agent: |
MT-NewsWatcher/3.5.3b3 (Intel Mac OS X) |
In article
<50944d4c-7190-41f4-90ec-17755ab0b61d@k36g2000pri.googlegroups.com>,
À¯×°×² <girzel@gmail.com> wrote:
> On Dec 20, 9:45 am, Barry Margolin <bar...@alum.mit.edu> wrote:
> > In article
> > <b4647b13-f390-48aa-9373-46192b1bb...@b41g2000pra.googlegroups.com>,
> >
> >
> >
> > À¯×°×² <gir...@gmail.com> wrote:
> > > On Dec 19, 1:38 pm, Barry Margolin <bar...@alum.mit.edu> wrote:
> > > > In article
> > > > <97c43290-2786-4b18-aaa8-429005829...@s9g2000prm.googlegroups.com>,
> >
> > > > À¯×°×² <gir...@gmail.com> wrote:
> > > > > Can anyone tell me if it's possible to direct tramp to use a
> > > > > particular set of ssh keys when connecting to a particular server? I'm
> > > > > trying to use scp with the equivalent of the -i option, what I tried
> > > > > below just seems to confuse tramp, is there some other way I should be
> > > > > doing this?
> >
> > > > > (add-to-list 'tramp-default-method-alist
> > > > > '("remote_server" "" "scp -i /Users/my_user/.ssh/
> > > > > my_key"))
> >
> > > > Why not use the IdentityFile directives in ~/.ssh/config?
> >
> > > I'm already using a set of keys for regular ssh login, and there's a
> > > passphrase on that set. I was trying to create a second set
> > > specifically for tramp to use, with no passphrase and restricted
> > > permissions on the server side. So far as I know, I can only provide a
> > > single IdentityFile per host in ssh/config -- do you know of any other
> > > ways to automatically distinguish the proper keys for tramp to use
> > > with my server?
> >
> > I think you have to define a new method.
> >
> > (defvar my-scp-extra-args '("-i" "/Users/my_user/.ssh/my_key"))
> > (let* ((scp-method (assoc "scp" tramp-methods))
> > (new-method (copy-tree (cdr scp-method)))
> > (login-args (assoc 'tramp-login-args new-method))
> > (copy-args (assoc 'tramp-copy-args new-method)))
> > (setf (cadr login-args)
> > `(,@my-scp-extra-args ,@(cadr login-args))
> > (cadr copy-args)
> > `(,@my-scp-extra-args ,@(cadr copy-args)))
> > (push `("myscp" . ,new-method) tramp-methods))
> >
> > Then set the default method for remote_server to "myscp".
>
> Thanks for this! I'm going to ask a fairly stupid follow-up question.
> I put this in my emacs, but it raised this error "void variable tramp-
> methods". I thought maybe you had to quote tramp-methods, but after I
> did it started raising "Wrong type argument: listp, tramp-methods".
> I'm not quite sure where to go from here. If I'm running 22.3.1, I
> shouldn't have to have (require 'tramp) at the top of my .emacs,
> should I? I added that, for the heck of it, and it started complaining
> about other tramp-related variables being undefined elsewhere in
> my .emacs file.
>
> Sorry to chump out, hoping for a little more help...
You probably need to put:
(load "tramp")
before this, so that the variable will be defined. It's not normally
defined until tramp is auto-loaded.
--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
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