git-shell(1) [debian man page]

GIT-SHELL(1)							    Git Manual							      GIT-SHELL(1)

NAME

       git-shell - Restricted login shell for Git-only SSH access

SYNOPSIS

       git shell [-c <command> <argument>]

DESCRIPTION

       A login shell for SSH accounts to provide restricted Git access. When -c is given, the program executes <command> non-interactively;
       <command> can be one of git receive-pack, git upload-pack, git upload-archive, cvs server, or a command in COMMAND_DIR. The shell is
       started in interactive mode when no arguments are given; in this case, COMMAND_DIR must exist, and any of the executables in it can be
       invoked.

       cvs server is a special command which executes git-cvsserver.

       COMMAND_DIR is the path "$HOME/git-shell-commands". The user must have read and execute permissions to the directory in order to execute
       the programs in it. The programs are executed with a cwd of $HOME, and <argument> is parsed as a command-line string.

GIT

       Part of the git(1) suite

Git 1.7.10.4							    11/24/2012							      GIT-SHELL(1)

GIT-SHELL(1)							    Git Manual							      GIT-SHELL(1)

NAME

       git-shell - Restricted login shell for Git-only SSH access

SYNOPSIS

       chsh -s $(command -v git-shell) <user>
       git clone <user>@localhost:/path/to/repo.git
       ssh <user>@localhost

DESCRIPTION

       This is a login shell for SSH accounts to provide restricted Git access. It permits execution only of server-side Git commands implementing
       the pull/push functionality, plus custom commands present in a subdirectory named git-shell-commands in the user's home directory.

COMMANDS

       git shell accepts the following commands after the -c option:

       git receive-pack <argument>, git upload-pack <argument>, git upload-archive <argument>
	   Call the corresponding server-side command to support the client's git push, git fetch, or git archive --remote request.

       cvs server
	   Imitate a CVS server. See git-cvsserver(1).

       If a ~/git-shell-commands directory is present, git shell will also handle other, custom commands by running "git-shell-commands/<command>
       <arguments>" from the user's home directory.

INTERACTIVE USE

       By default, the commands above can be executed only with the -c option; the shell is not interactive.

       If a ~/git-shell-commands directory is present, git shell can also be run interactively (with no arguments). If a help command is present
       in the git-shell-commands directory, it is run to provide the user with an overview of allowed actions. Then a "git> " prompt is presented
       at which one can enter any of the commands from the git-shell-commands directory, or exit to close the connection.

       Generally this mode is used as an administrative interface to allow users to list repositories they have access to, create, delete, or
       rename repositories, or change repository descriptions and permissions.

       If a no-interactive-login command exists, then it is run and the interactive shell is aborted.

EXAMPLE

       To disable interactive logins, displaying a greeting instead:

	   $ chsh -s /usr/bin/git-shell
	   $ mkdir $HOME/git-shell-commands
	   $ cat >$HOME/git-shell-commands/no-interactive-login <<EOF
	   #!/bin/sh
	   printf '%s
' "Hi $USER! You've successfully authenticated, but I do not"
	   printf '%s
' "provide interactive shell access."
	   exit 128
	   EOF
	   $ chmod +x $HOME/git-shell-commands/no-interactive-login

       To enable git-cvsserver access (which should generally have the no-interactive-login example above as a prerequisite, as creating the
       git-shell-commands directory allows interactive logins):

	   $ cat >$HOME/git-shell-commands/cvs <<EOF
	   if ! test $# = 1 && test "$1" = "server"
	   then
		   echo >&2 "git-cvsserver only handles "server""
		   exit 1
	   fi
	   exec git cvsserver server
	   EOF
	   $ chmod +x $HOME/git-shell-commands/cvs

SEE ALSO

       ssh(1), git-daemon(1), contrib/git-shell-commands/README

GIT

       Part of the git(1) suite

Git 2.17.1							    10/05/2018							      GIT-SHELL(1)