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nixos/lightdm: support greeter-less auto login

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This adds configuration options for automatic login and disabling the
greeter (this should avoid the dependency on gtk).
This commit is contained in:
Benno Fünfstück 2016-07-17 18:51:55 +02:00
parent 8881f940a9
commit 336786addc
1 changed files with 96 additions and 4 deletions
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100
nixos/modules/services/x11/display-managers/lightdm.nix
View file

@ -4,7 +4,8 @@ with lib;
let
dmcfg = config.services.xserver.displayManager;
xcfg = config.services.xserver;
dmcfg = xcfg.displayManager;
xEnv = config.systemd.services."display-manager".environment;
cfg = dmcfg.lightdm;
@ -36,16 +37,31 @@ let
lightdmConf = writeText "lightdm.conf"
''
[LightDM]
greeter-user = ${config.users.extraUsers.lightdm.name}
greeters-directory = ${cfg.greeter.package}
${optionalString cfg.greeter.enable ''
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}
${optionalString cfg.greeter.enable ''
greeter-session = ${cfg.greeter.name}
''}
${optionalString cfg.autoLogin.enable ''
autologin-user = ${cfg.autoLogin.user}
autologin-user-timeout = ${toString cfg.autoLogin.timeout}
autologin-session = ${defaultSessionName}
''}
${cfg.extraSeatDefaults}
'';
defaultSessionName =
let
dm = xcfg.desktopManager.default;
wm = xcfg.windowManager.default;
in dm + optionalString (wm != "none") (" + " + wm);
in
{
# Note: the order in which lightdm greeter modules are imported
@ -68,6 +84,14 @@ in
};
greeter = {
enable = mkOption {
type = types.bool;
default = true;
description = ''
If set to false, run lightdm in greeterless mode. This only works if autologin
is enabled and autoLogin.timeout is zero.
'';
};
package = mkOption {
type = types.package;
description = ''
@ -102,10 +126,67 @@ in
description = "Extra lines to append to SeatDefaults section.";
};
autoLogin = mkOption {
default = {};
description = ''
Configuration for automatic login.
'';
type = types.submodule {
options = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Automatically log in as the specified <option>autoLogin.user</option>.
'';
};
user = mkOption {
type = types.nullOr types.str;
default = null;
description = ''
User to be used for the automatic login.
'';
};
timeout = mkOption {
type = types.int;
default = 0;
description = ''
Show the greeter for this many seconds before automatic login occurs.
'';
};
};
};
};
};
};
config = mkIf cfg.enable {
assertions = [
{ assertion = cfg.autoLogin.enable -> cfg.autoLogin.user != null;
message = ''
LightDM auto-login requires services.xserver.displayManager.lightdm.autoLogin.user to be set
'';
}
{ assertion = cfg.autoLogin.enable -> elem defaultSessionName dmcfg.session.names;
message = ''
LightDM 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.
'';
}
{ assertion = !cfg.greeter.enable -> (cfg.autoLogin.enable && cfg.autoLogin.timeout == 0);
message = ''
LightDM can only run without greeter if automatic login is enabled and the timeout for it
is set to zero.
'';
}
];
services.xserver.displayManager.slim.enable = false;
services.xserver.displayManager.job = {
@ -144,6 +225,17 @@ in
session optional ${pkgs.systemd}/lib/security/pam_systemd.so
'';
};
security.pam.services.lightdm-autologin.text = ''
auth requisite pam_nologin.so
auth required pam_succeed_if.so uid >= 1000 quiet
auth required pam_permit.so
account include lightdm
password include lightdm
session include lightdm
'';
users.extraUsers.lightdm = {
createHome = true;