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From: Jeff King <peff@peff.net>
To: Junio C Hamano <gitster@pobox.com>
Cc: Sven Strickroth <sven.strickroth@tu-clausthal.de>,
	Jakub Narebski <jnareb@gmail.com>,
	git@vger.kernel.org
Subject: Re: [PATCH 2/2] git-svn, perl/Git.pm: extend and use Git->prompt method for querying users
Date: Tue, 14 Feb 2012 17:47:41 -0500	[thread overview]
Message-ID: <20120214224741.GH24802@sigill.intra.peff.net> (raw)
In-Reply-To: <7v4nut59hw.fsf@alter.siamese.dyndns.org>

On Tue, Feb 14, 2012 at 02:35:23PM -0800, Junio C Hamano wrote:

> Jeff King <peff@peff.net> writes:
> 
> >   export SSH_ASKPASS=whatever
> >
> >   # this will try the terminal first, then SSH_ASKPASS, because it is
> >   # ssh doing the asking
> >   git push ssh://example.com/repo.git
> 
> Sorry, you lost me here.  Does "ssh example.com" consult the terminal
> first and then fall back to SSH_ASKPASS environment variable?

Yes. Try:

  SSH_ASKPASS=cat ssh example.com

where cat is any program whose running you could detect (in this case,
because cat will complain to stderr about not being able to open its
argument). And "example.com" must be something that you can actually
make an ssh connection to.

Compare with:

  SSH_ASKPASS=cat setsid ssh example.com

which will realize it has no controlling tty, and fallback to
SSH_ASKPASS.

I actually find the behavior slightly annoying (because sometimes you do
have a controlling terminal, but it is not accessible or obvious to the
user). But I think it's important to be consistent, and provide
GIT_ASKPASS for people who really want to say "no, don't even bother
with the terminal".

> I was under the impression that SSH_ASKPASS was to either give hands-free
> access to the keychain or give GUI experience so that people do not have
> to type from their terminals...

Not exactly. It's useful in two situations (in my experience):

  1. A GUI program spawns an ssh tunnel, and there is no tty on which to
     prompt the user.

  2. Populating an ssh-agent via ssh-add during the user's login
     sequence.

It doesn't work to give a GUI experience to creating a remote terminal
session, since if you have a terminal, it will always prefer to prompt
on the terminal.

-Peff

  reply	other threads:[~2012-02-14 22:47 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-17 15:15 [PATCH] honour GIT_ASKPASS for querying username in git-svn Sven Strickroth
2011-11-18 11:36 ` Erik Faye-Lund
2011-11-18 13:30   ` Sven Strickroth
2011-11-18 14:19     ` Erik Faye-Lund
2011-11-26 11:33       ` Sven Strickroth
2011-11-30  6:44         ` Jeff King
2011-12-26 23:49           ` Sven Strickroth
2011-12-27 14:33             ` Jakub Narebski
2011-12-27 14:39               ` Sven Strickroth
2011-12-27 16:00                 ` Jakub Narebski
2011-12-27 16:01                 ` [PATCH 0/5] honour *_ASKPASS for querying user " Sven Strickroth
2011-12-27 16:05                   ` [PATCH 1/5] add central method for prompting a user using GIT_ASKPASS or SSH_ASKPASS Sven Strickroth
2011-12-27 20:47                     ` Junio C Hamano
2011-12-27 23:12                       ` Thomas Adam
2011-12-27 23:35                         ` Junio C Hamano
2011-12-27 16:06                   ` [PATCH 2/5] switch to central prompt method Sven Strickroth
2011-12-27 20:47                     ` Junio C Hamano
2011-12-27 16:07                   ` [PATCH 3/5] honour *_ASKPASS for querying username and for querying further actions like unknown certificates Sven Strickroth
2011-12-27 20:56                     ` Junio C Hamano
2011-12-27 16:07                   ` [PATCH 4/5] ignore empty *_ASKPASS variables Sven Strickroth
2011-12-27 21:00                     ` Junio C Hamano
2011-12-27 16:07                   ` [PATCH 5/5] make askpass_prompt a global prompt method for asking users Sven Strickroth
2011-12-27 21:10                     ` Junio C Hamano
2011-12-27 21:41                       ` Junio C Hamano
2011-12-28  0:11                         ` [PATCH 1/2] git-svn, perl/Git.pm: add central method for prompting passwords honoring GIT_ASKPASS and SSH_ASKPASS Sven Strickroth
2011-12-28  2:34                           ` Junio C Hamano
2011-12-28 16:17                             ` Sven Strickroth
2011-12-28 18:56                             ` Jakub Narebski
2012-01-03 10:17                           ` Ævar Arnfjörð Bjarmason
2012-01-03 10:25                             ` Sven Strickroth
2012-01-03 12:03                               ` Ævar Arnfjörð Bjarmason
2012-01-03 12:06                                 ` Ævar Arnfjörð Bjarmason
2012-01-03 13:18                                 ` Sven Strickroth
2012-01-03 19:42                                 ` Junio C Hamano
2012-01-03 22:51                             ` Junio C Hamano
2012-01-03 23:27                               ` Sven Strickroth
2012-01-04  0:10                                 ` Junio C Hamano
2012-01-04  7:55                                   ` Sven Strickroth
2012-01-04  8:31                                     ` Sven Strickroth
2012-01-04 13:34                                       ` Jeff King
2012-01-04 14:13                                         ` Sven Strickroth
2012-01-04 19:08                                       ` Junio C Hamano
2012-01-07  4:27                                         ` Sven Strickroth
2012-01-04 18:58                                     ` Junio C Hamano
2012-01-04 19:20                                       ` Sven Strickroth
2011-12-28  0:12                         ` [PATCH 2/2] git-svn, perl/Git.pm: extend and use Git->prompt method for querying users Sven Strickroth
2011-12-28  2:41                           ` Junio C Hamano
2011-12-28 10:41                             ` Sven Strickroth
2011-12-28 21:00                               ` Junio C Hamano
2011-12-28 21:38                                 ` Junio C Hamano
2011-12-28 21:47                                   ` Sven Strickroth
2011-12-28 22:29                                     ` Junio C Hamano
2011-12-30  4:40                                       ` Sven Strickroth
2011-12-30 13:54                                         ` Jeff King
2011-12-30 14:53                                           ` Sven Strickroth
2012-01-01  9:11                                             ` Junio C Hamano
2012-01-01 19:57                                               ` Sven Strickroth
2012-01-01 20:55                                                 ` Sven Strickroth
2012-01-01 19:45                                   ` Sven Strickroth
2012-01-03 18:19                                     ` Junio C Hamano
2012-01-03 18:40                                       ` Jeff King
2012-02-12 16:02                                         ` Sven Strickroth
2012-02-12 16:11                                           ` Jakub Narebski
2012-02-12 16:26                                             ` Sven Strickroth
2012-02-14 22:20                                               ` Jeff King
2012-02-14 22:35                                                 ` Junio C Hamano
2012-02-14 22:47                                                   ` Jeff King [this message]
2012-01-03 23:24                                       ` Sven Strickroth
2012-01-04  0:12                                         ` Junio C Hamano
2012-10-06 15:18                                           ` Sven Strickroth
2012-10-06 18:28                                             ` Junio C Hamano
2012-11-11 16:40                                               ` [PATCH 0/2] second try Sven Strickroth
2012-11-24 19:07                                                 ` Sven Strickroth
2012-11-26  4:50                                                   ` Junio C Hamano
2012-12-17 15:54                                                     ` Sven Strickroth
2012-12-17 20:08                                                       ` Junio C Hamano
2012-12-18  0:28                                                         ` [PATCH 1/3] git-svn, perl/Git.pm: add central method for prompting passwords Sven Strickroth
2012-12-18  0:28                                                         ` [PATCH 2/3] perl/Git.pm: Honor SSH_ASKPASS as fallback if GIT_ASKPASS is not set Sven Strickroth
2012-12-18  0:57                                                           ` Jeff King
2012-12-18  0:28                                                         ` [PATCH 3/3] git-svn, perl/Git.pm: extend and use Git->prompt method for querying users Sven Strickroth
2012-11-11 16:40                                               ` [PATCH 1/2] git-svn, perl/Git.pm: add central method for prompting passwords honoring GIT_ASKPASS and SSH_ASKPASS Sven Strickroth
2012-11-11 16:41                                               ` [PATCH 2/2] git-svn, perl/Git.pm: extend and use Git->prompt method for querying users Sven Strickroth

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