100 lines
3 KiB
Nix
100 lines
3 KiB
Nix
{ config, pkgs, lib, ... }:
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let
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inherit (lib) mkOption types mkIf;
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cfg = config.services.kmscon;
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autologinArg = lib.optionalString (cfg.autologinUser != null) "-f ${cfg.autologinUser}";
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configDir = pkgs.writeTextFile { name = "kmscon-config"; destination = "/kmscon.conf"; text = cfg.extraConfig; };
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in {
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options = {
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services.kmscon = {
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enable = mkOption {
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description = ''
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Use kmscon as the virtual console instead of gettys.
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kmscon is a kms/dri-based userspace virtual terminal implementation.
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It supports a richer feature set than the standard linux console VT,
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including full unicode support, and when the video card supports drm
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should be much faster.
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'';
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type = types.bool;
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default = false;
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};
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hwRender = mkOption {
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description = "Whether to use 3D hardware acceleration to render the console.";
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type = types.bool;
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default = false;
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};
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extraConfig = mkOption {
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description = "Extra contents of the kmscon.conf file.";
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type = types.lines;
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default = "";
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example = "font-size=14";
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};
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extraOptions = mkOption {
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description = "Extra flags to pass to kmscon.";
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type = types.separatedString " ";
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default = "";
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example = "--term xterm-256color";
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};
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autologinUser = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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Username of the account that will be automatically logged in at the console.
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If unspecified, a login prompt is shown as usual.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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# Largely copied from unit provided with kmscon source
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systemd.units."kmsconvt@.service".text = ''
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[Unit]
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Description=KMS System Console on %I
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Documentation=man:kmscon(1)
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After=systemd-user-sessions.service
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After=plymouth-quit-wait.service
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After=systemd-logind.service
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After=systemd-vconsole-setup.service
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Requires=systemd-logind.service
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Before=getty.target
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Conflicts=getty@%i.service
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OnFailure=getty@%i.service
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IgnoreOnIsolate=yes
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ConditionPathExists=/dev/tty0
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[Service]
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ExecStart=
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ExecStart=${pkgs.kmscon}/bin/kmscon "--vt=%I" ${cfg.extraOptions} --seats=seat0 --no-switchvt --configdir ${configDir} --login -- ${pkgs.shadow}/bin/login -p ${autologinArg}
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UtmpIdentifier=%I
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TTYPath=/dev/%I
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TTYReset=yes
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TTYVHangup=yes
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TTYVTDisallocate=yes
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X-RestartIfChanged=false
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'';
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systemd.units."autovt@.service".unit = pkgs.runCommand "unit" { }
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''
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mkdir -p $out
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ln -s ${config.systemd.units."kmsconvt@.service".unit}/kmsconvt@.service $out/autovt@.service
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'';
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systemd.services.systemd-vconsole-setup.enable = false;
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services.kmscon.extraConfig = mkIf cfg.hwRender ''
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drm
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hwaccel
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'';
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hardware.opengl.enable = mkIf cfg.hwRender true;
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};
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}
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