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35297089e5
If I disable git-shell's interactive mode by removing the ~/git-shell-commands directory, attempts to ssh in to the service produce a message intended for the administrator: $ ssh git@myserver fatal: Interactive git shell is not enabled. hint: ~/git-shell-commands should exist and have read and execute access. $ That is helpful for the new admin who is wondering "What? Why isn't the git-shell I just set up working?", but once the site setup is complete, it would be better to give the user a friendly hint that she is on the right track, like GitHub does. Hi <username>! You've successfully authenticated, but GitHub does not provide shell access. An appropriate greeting might even include more complex dynamic information, like gitolite's list of repositories the user has access to. Add support for a ~/git-shell-commands/no-interactive-login command that generates an arbitrary greeting. When the user tries to log in: * If the file ~/git-shell-commands/no-interactive-login exists, run no-interactive-login to let the server say what it likes, then hang up. * Otherwise, if ~/git-shell-commands/ is present, start an interactive read-eval-print loop. * Otherwise, print the usual configuration hint and hang up. Reported-by: Ethan Reesor <firelizzard@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Improved-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
91 lines
2.5 KiB
Plaintext
91 lines
2.5 KiB
Plaintext
git-shell(1)
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============
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NAME
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----
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git-shell - Restricted login shell for Git-only SSH access
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SYNOPSIS
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--------
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[verse]
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'chsh' -s $(command -v git-shell) <user>
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'git clone' <user>`@localhost:/path/to/repo.git`
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'ssh' <user>`@localhost`
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DESCRIPTION
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-----------
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This is a login shell for SSH accounts to provide restricted Git access.
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It permits execution only of server-side Git commands implementing the
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pull/push functionality, plus custom commands present in a subdirectory
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named `git-shell-commands` in the user's home directory.
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COMMANDS
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--------
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'git shell' accepts the following commands after the '-c' option:
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'git receive-pack <argument>'::
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'git upload-pack <argument>'::
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'git upload-archive <argument>'::
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Call the corresponding server-side command to support
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the client's 'git push', 'git fetch', or 'git archive --remote'
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request.
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'cvs server'::
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Imitate a CVS server. See linkgit:git-cvsserver[1].
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If a `~/git-shell-commands` directory is present, 'git shell' will
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also handle other, custom commands by running
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"`git-shell-commands/<command> <arguments>`" from the user's home
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directory.
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INTERACTIVE USE
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---------------
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By default, the commands above can be executed only with the '-c'
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option; the shell is not interactive.
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If a `~/git-shell-commands` directory is present, 'git shell'
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can also be run interactively (with no arguments). If a `help`
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command is present in the `git-shell-commands` directory, it is
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run to provide the user with an overview of allowed actions. Then a
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"git> " prompt is presented at which one can enter any of the
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commands from the `git-shell-commands` directory, or `exit` to close
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the connection.
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Generally this mode is used as an administrative interface to allow
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users to list repositories they have access to, create, delete, or
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rename repositories, or change repository descriptions and
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permissions.
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If a `no-interactive-login` command exists, then it is run and the
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interactive shell is aborted.
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EXAMPLE
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-------
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To disable interactive logins, displaying a greeting instead:
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+
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----------------
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$ chsh -s /usr/bin/git-shell
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$ mkdir $HOME/git-shell-commands
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$ cat >$HOME/git-shell-commands/no-interactive-login <<\EOF
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#!/bin/sh
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printf '%s\n' "Hi $USER! You've successfully authenticated, but I do not"
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printf '%s\n' "provide interactive shell access."
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exit 128
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EOF
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$ chmod +x $HOME/git-shell-commands/no-interactive-login
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----------------
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SEE ALSO
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--------
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ssh(1),
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linkgit:git-daemon[1],
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contrib/git-shell-commands/README
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GIT
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---
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Part of the linkgit:git[1] suite
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