1645acf1d3
Before whenever environment variables changed, pam files had to be rebuild. This is expensive since each file needs its own sandbox set up.
98 lines
2.7 KiB
Nix
98 lines
2.7 KiB
Nix
{ config, pkgs, lib, ... }:
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with lib;
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let
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cfg = config.services.cage;
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in {
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options.services.cage.enable = mkEnableOption "cage kiosk service";
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options.services.cage.user = mkOption {
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type = types.str;
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default = "demo";
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description = ''
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User to log-in as.
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'';
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};
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options.services.cage.extraArguments = mkOption {
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type = types.listOf types.str;
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default = [];
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defaultText = "[]";
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description = "Additional command line arguments to pass to Cage.";
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example = ["-d"];
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};
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options.services.cage.program = mkOption {
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type = types.path;
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default = "${pkgs.xterm}/bin/xterm";
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description = ''
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Program to run in cage.
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'';
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};
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config = mkIf cfg.enable {
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# The service is partially based off of the one provided in the
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# cage wiki at
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# https://github.com/Hjdskes/cage/wiki/Starting-Cage-on-boot-with-systemd.
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systemd.services."cage-tty1" = {
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enable = true;
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after = [
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"systemd-user-sessions.service"
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"plymouth-start.service"
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"plymouth-quit.service"
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"systemd-logind.service"
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"getty@tty1.service"
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];
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before = [ "graphical.target" ];
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wants = [ "dbus.socket" "systemd-logind.service" "plymouth-quit.service"];
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wantedBy = [ "graphical.target" ];
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conflicts = [ "getty@tty1.service" ];
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restartIfChanged = false;
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unitConfig.ConditionPathExists = "/dev/tty1";
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serviceConfig = {
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ExecStart = ''
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${pkgs.cage}/bin/cage \
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${escapeShellArgs cfg.extraArguments} \
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-- ${cfg.program}
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'';
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User = cfg.user;
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IgnoreSIGPIPE = "no";
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# Log this user with utmp, letting it show up with commands 'w' and
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# 'who'. This is needed since we replace (a)getty.
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UtmpIdentifier = "%n";
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UtmpMode = "user";
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# A virtual terminal is needed.
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TTYPath = "/dev/tty1";
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TTYReset = "yes";
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TTYVHangup = "yes";
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TTYVTDisallocate = "yes";
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# Fail to start if not controlling the virtual terminal.
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StandardInput = "tty-fail";
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# Set up a full (custom) user session for the user, required by Cage.
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PAMName = "cage";
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};
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};
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security.pam.services.cage.text = ''
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auth required pam_unix.so nullok
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account required pam_unix.so
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session required pam_unix.so
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session required pam_env.so conffile=/etc/pam/environment readenv=0
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session required ${pkgs.systemd}/lib/security/pam_systemd.so
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'';
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hardware.opengl.enable = mkDefault true;
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systemd.targets.graphical.wants = [ "cage-tty1.service" ];
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systemd.defaultUnit = "graphical.target";
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};
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meta.maintainers = with lib.maintainers; [ matthewbauer ];
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}
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