nixpkgs/nixos/modules/services/x11/display-managers/sddm.nix
Michael Weiss 1273f414a7 display-managers: Fix the xsession parameters
The xsession script was called with inconsistent (depending on the
display managers) and wrong parameters. The main reason for this where
the spaces the parameter syntax. In order to fix this the old syntax:
$1 = '<desktop-manager> + <window-manager>'
Will be replaced with a new syntax:
$1 = "<desktop-manager>+<window-manager>"

This assumes that neither "<desktop-manager>" nor "<window-manager>"
contain the "+" character but this shouldn't be a problem.

This patch also fixes the quoting by using double quotes (") instead of
single quotes (') [0].

Last but not least this'll add some comments for the better
understanding of the script.

[0]: https://specifications.freedesktop.org/desktop-entry-spec/latest/ar01s06.html
2017-04-28 22:00:14 +02:00

264 lines
6.8 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
xcfg = config.services.xserver;
dmcfg = xcfg.displayManager;
cfg = dmcfg.sddm;
xEnv = config.systemd.services."display-manager".environment;
sddm = cfg.package;
xserverWrapper = pkgs.writeScript "xserver-wrapper" ''
#!/bin/sh
${concatMapStrings (n: "export ${n}=\"${getAttr n xEnv}\"\n") (attrNames xEnv)}
exec systemd-cat ${dmcfg.xserverBin} ${toString dmcfg.xserverArgs} "$@"
'';
Xsetup = pkgs.writeScript "Xsetup" ''
#!/bin/sh
${cfg.setupScript}
'';
Xstop = pkgs.writeScript "Xstop" ''
#!/bin/sh
${cfg.stopScript}
'';
cfgFile = pkgs.writeText "sddm.conf" ''
[General]
HaltCommand=${pkgs.systemd}/bin/systemctl poweroff
RebootCommand=${pkgs.systemd}/bin/systemctl reboot
${optionalString cfg.autoNumlock ''
Numlock=on
''}
[Theme]
Current=${cfg.theme}
ThemeDir=${sddm}/share/sddm/themes
FacesDir=${sddm}/share/sddm/faces
[Users]
MaximumUid=${toString config.ids.uids.nixbld}
HideUsers=${concatStringsSep "," dmcfg.hiddenUsers}
HideShells=/run/current-system/sw/bin/nologin
[X11]
MinimumVT=${toString (if xcfg.tty != null then xcfg.tty else 7)}
ServerPath=${xserverWrapper}
XephyrPath=${pkgs.xorg.xorgserver.out}/bin/Xephyr
SessionCommand=${dmcfg.session.script}
SessionDir=${dmcfg.session.desktops}
XauthPath=${pkgs.xorg.xauth}/bin/xauth
DisplayCommand=${Xsetup}
DisplayStopCommand=${Xstop}
${optionalString cfg.autoLogin.enable ''
[Autologin]
User=${cfg.autoLogin.user}
Session=${defaultSessionName}.desktop
Relogin=${boolToString cfg.autoLogin.relogin}
''}
${cfg.extraConfig}
'';
defaultSessionName =
let
dm = xcfg.desktopManager.default;
wm = xcfg.windowManager.default;
in dm + optionalString (wm != "none") ("+" + wm);
in
{
options = {
services.xserver.displayManager.sddm = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable sddm as the display manager.
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
example = ''
[Autologin]
User=john
Session=plasma.desktop
'';
description = ''
Extra lines appended to the configuration of SDDM.
'';
};
theme = mkOption {
type = types.str;
default = "";
description = ''
Greeter theme to use.
'';
};
package = mkOption {
type = types.package;
default = pkgs.sddm;
description = ''
The SDDM package to install.
The default package can be overridden to provide extra themes.
'';
};
autoNumlock = mkOption {
type = types.bool;
default = false;
description = ''
Enable numlock at login.
'';
};
setupScript = mkOption {
type = types.str;
default = "";
example = ''
# workaround for using NVIDIA Optimus without Bumblebee
xrandr --setprovideroutputsource modesetting NVIDIA-0
xrandr --auto
'';
description = ''
A script to execute when starting the display server.
'';
};
stopScript = mkOption {
type = types.str;
default = "";
description = ''
A script to execute when stopping the display server.
'';
};
autoLogin = mkOption {
default = {};
description = ''
Configuration for automatic login.
'';
type = types.submodule {
options = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Automatically log in as <option>autoLogin.user</option>.
'';
};
user = mkOption {
type = types.nullOr types.str;
default = null;
description = ''
User to be used for the automatic login.
'';
};
relogin = mkOption {
type = types.bool;
default = false;
description = ''
If true automatic login will kick in again on session exit (logout), otherwise it
will only log in automatically when the display-manager is started.
'';
};
};
};
};
};
};
config = mkIf cfg.enable {
assertions = [
{ assertion = cfg.autoLogin.enable -> cfg.autoLogin.user != null;
message = ''
SDDM auto-login requires services.xserver.displayManager.sddm.autoLogin.user to be set
'';
}
{ assertion = cfg.autoLogin.enable -> elem defaultSessionName dmcfg.session.names;
message = ''
SDDM auto-login requires that services.xserver.desktopManager.default and
services.xserver.windowMananger.default are set to valid values. The current
default session: ${defaultSessionName} is not valid.
'';
}
];
services.xserver.displayManager.slim.enable = false;
services.xserver.displayManager.job = {
logsXsession = true;
execCmd = "exec ${sddm}/bin/sddm";
};
security.pam.services = {
sddm = {
allowNullPassword = true;
startSession = true;
};
sddm-greeter.text = ''
auth required pam_succeed_if.so audit quiet_success user = sddm
auth optional pam_permit.so
account required pam_succeed_if.so audit quiet_success user = sddm
account sufficient pam_unix.so
password required pam_deny.so
session required pam_succeed_if.so audit quiet_success user = sddm
session required pam_env.so envfile=${config.system.build.pamEnvironment}
session optional ${pkgs.systemd}/lib/security/pam_systemd.so
session optional pam_keyinit.so force revoke
session optional pam_permit.so
'';
sddm-autologin.text = ''
auth requisite pam_nologin.so
auth required pam_succeed_if.so uid >= 1000 quiet
auth required pam_permit.so
account include sddm
password include sddm
session include sddm
'';
};
users.extraUsers.sddm = {
createHome = true;
home = "/var/lib/sddm";
group = "sddm";
uid = config.ids.uids.sddm;
};
environment.etc."sddm.conf".source = cfgFile;
users.extraGroups.sddm.gid = config.ids.gids.sddm;
services.dbus.packages = [ sddm.unwrapped ];
# To enable user switching, allow sddm to allocate TTYs/displays dynamically.
services.xserver.tty = null;
services.xserver.display = null;
};
}