9be012f0d4
- if xserver.tty and/or display are set to null, then don't specify them, or the -logfile argument in the xserverArgs - For lightdm, we set default tty and display to null and we determine those at runtime based on arguments passed. This is necessary because we run multiple X servers so they can't all be on the same display
161 lines
4.5 KiB
Nix
161 lines
4.5 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
|
|
dmcfg = config.services.xserver.displayManager;
|
|
xEnv = config.systemd.services."display-manager".environment;
|
|
cfg = dmcfg.lightdm;
|
|
|
|
inherit (pkgs) stdenv lightdm writeScript writeText;
|
|
|
|
# lightdm runs with clearenv(), but we need a few things in the enviornment for X to startup
|
|
xserverWrapper = writeScript "xserver-wrapper"
|
|
''
|
|
#! ${pkgs.bash}/bin/bash
|
|
${concatMapStrings (n: "export ${n}=\"${getAttr n xEnv}\"\n") (attrNames xEnv)}
|
|
|
|
display=$(echo "$@" | xargs -n 1 | grep -P ^:\\d\$ | head -n 1 | sed s/^://)
|
|
if [ -z "$display" ]
|
|
then additionalArgs=":0 -logfile /var/log/X.0.log"
|
|
else additionalArgs="-logfile /var/log/X.$display.log"
|
|
fi
|
|
|
|
exec ${dmcfg.xserverBin} ${dmcfg.xserverArgs} $additionalArgs "$@"
|
|
'';
|
|
|
|
usersConf = writeText "users.conf"
|
|
''
|
|
[UserList]
|
|
minimum-uid=500
|
|
hidden-users=${concatStringsSep " " dmcfg.hiddenUsers}
|
|
hidden-shells=/run/current-system/sw/bin/nologin
|
|
'';
|
|
|
|
lightdmConf = writeText "lightdm.conf"
|
|
''
|
|
[LightDM]
|
|
greeter-user = ${config.users.extraUsers.lightdm.name}
|
|
greeters-directory = ${cfg.greeter.package}
|
|
sessions-directory = ${dmcfg.session.desktops}
|
|
|
|
[Seat:*]
|
|
xserver-command = ${xserverWrapper}
|
|
session-wrapper = ${dmcfg.session.script}
|
|
greeter-session = ${cfg.greeter.name}
|
|
${cfg.extraSeatDefaults}
|
|
'';
|
|
in
|
|
{
|
|
# Note: the order in which lightdm greeter modules are imported
|
|
# here determines the default: later modules (if enable) are
|
|
# preferred.
|
|
imports = [
|
|
./lightdm-greeters/gtk.nix
|
|
];
|
|
|
|
options = {
|
|
|
|
services.xserver.displayManager.lightdm = {
|
|
|
|
enable = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
description = ''
|
|
Whether to enable lightdm as the display manager.
|
|
'';
|
|
};
|
|
|
|
greeter = {
|
|
package = mkOption {
|
|
type = types.path;
|
|
description = ''
|
|
The LightDM greeter to login via. The package should be a directory
|
|
containing a .desktop file matching the name in the 'name' option.
|
|
'';
|
|
|
|
};
|
|
name = mkOption {
|
|
type = types.string;
|
|
description = ''
|
|
The name of a .desktop file in the directory specified
|
|
in the 'package' option.
|
|
'';
|
|
};
|
|
};
|
|
|
|
background = mkOption {
|
|
description = ''
|
|
The background image or color to use.
|
|
'';
|
|
};
|
|
|
|
extraSeatDefaults = mkOption {
|
|
type = types.lines;
|
|
default = "";
|
|
example = ''
|
|
greeter-show-manual-login=true
|
|
'';
|
|
description = "Extra lines to append to SeatDefaults section.";
|
|
};
|
|
|
|
};
|
|
};
|
|
|
|
config = mkIf cfg.enable {
|
|
services.xserver.displayManager.slim.enable = false;
|
|
|
|
services.xserver.displayManager.job = {
|
|
logsXsession = true;
|
|
|
|
# lightdm relaunches itself via just `lightdm`, so needs to be on the PATH
|
|
execCmd = ''
|
|
export PATH=${lightdm}/sbin:$PATH
|
|
exec ${lightdm}/sbin/lightdm --log-dir=/var/log --run-dir=/run
|
|
'';
|
|
};
|
|
|
|
environment.etc."lightdm/lightdm.conf".source = lightdmConf;
|
|
environment.etc."lightdm/users.conf".source = usersConf;
|
|
|
|
services.dbus.enable = true;
|
|
services.dbus.packages = [ lightdm ];
|
|
|
|
security.pam.services.lightdm = {
|
|
allowNullPassword = true;
|
|
startSession = true;
|
|
};
|
|
security.pam.services.lightdm-greeter = {
|
|
allowNullPassword = true;
|
|
startSession = true;
|
|
text = ''
|
|
auth required pam_env.so envfile=${config.system.build.pamEnvironment}
|
|
auth required pam_permit.so
|
|
|
|
account required pam_permit.so
|
|
|
|
password required pam_deny.so
|
|
|
|
session required pam_env.so envfile=${config.system.build.pamEnvironment}
|
|
session required pam_unix.so
|
|
session optional ${pkgs.systemd}/lib/security/pam_systemd.so
|
|
'';
|
|
};
|
|
|
|
users.extraUsers.lightdm = {
|
|
createHome = true;
|
|
home = "/var/lib/lightdm-data";
|
|
group = "lightdm";
|
|
uid = config.ids.uids.lightdm;
|
|
};
|
|
|
|
users.extraGroups.lightdm.gid = config.ids.gids.lightdm;
|
|
|
|
services.xserver.displayManager.lightdm.background = mkDefault "${pkgs.nixos-artwork}/share/artwork/gnome/Gnome_Dark.png";
|
|
|
|
services.xserver.tty = null; # We might start multiple X servers so let the tty increment themselves..
|
|
services.xserver.display = null; # We specify our own display (and logfile) in xserver-wrapper up there
|
|
};
|
|
}
|