nixpkgs/nixos/modules/services/x11/terminal-server.nix
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00

80 lines
2.5 KiB
Nix
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

# This module implements a terminal service based on x11vnc. It
# listens on port 5900 for VNC connections. It then presents a login
# screen to the user. If the user successfully authenticates, x11vnc
# checks to see if a X server is already running for that user. If
# not, a X server (Xvfb) is started for that user. The Xvfb instances
# persist across VNC sessions.
{ config, lib, pkgs, ... }:
with lib;
let
# Wrap Xvfb to set some flags/variables.
xvfbWrapper = pkgs.writeScriptBin "Xvfb"
''
#! ${pkgs.stdenv.shell}
export XKB_BINDIR=${pkgs.xorg.xkbcomp}/bin
export XORG_DRI_DRIVER_PATH=${pkgs.mesa}/lib/dri
exec ${pkgs.xorg.xorgserver}/bin/Xvfb "$@" -xkbdir ${pkgs.xkeyboard_config}/etc/X11/xkb
'';
in
{
config = {
services.xserver.enable = true;
hardware.opengl.videoDrivers = [];
# Enable KDM. Any display manager will do as long as it supports XDMCP.
services.xserver.displayManager.kdm.enable = true;
services.xserver.displayManager.kdm.enableXDMCP = true;
services.xserver.displayManager.kdm.extraConfig =
''
[General]
# We're headless, so don't bother starting an X server.
StaticServers=
[Xdmcp]
Xaccess=${pkgs.writeText "Xaccess" "localhost"}
'';
systemd.sockets.terminal-server =
{ description = "Terminal Server Socket";
wantedBy = [ "sockets.target" ];
before = [ "multi-user.target" ];
socketConfig.Accept = true;
socketConfig.ListenStream = 5900;
};
systemd.services."terminal-server@" =
{ description = "Terminal Server";
path =
[ xvfbWrapper pkgs.gawk pkgs.which pkgs.openssl pkgs.xorg.xauth
pkgs.nettools pkgs.shadow pkgs.procps pkgs.utillinux pkgs.bash
];
environment.FD_GEOM = "1024x786x24";
environment.FD_XDMCP_IF = "127.0.0.1";
#environment.FIND_DISPLAY_OUTPUT = "/tmp/foo"; # to debug the "find display" script
serviceConfig =
{ StandardInput = "socket";
StandardOutput = "socket";
StandardError = "journal";
ExecStart = "@${pkgs.x11vnc}/bin/x11vnc x11vnc -inetd -display WAIT:1024x786:cmd=FINDCREATEDISPLAY-Xvfb.xdmcp -unixpw -ssl SAVE";
# Don't kill the X server when the user quits the VNC
# connection. FIXME: the X server should run in a
# separate systemd session.
KillMode = "process";
};
};
};
}