with import <stockholm/lib>; { config, pkgs, ... }: let cfg = config.tv.slock; in { options.tv.slock = { enable = mkEnableOption "tv.slock"; package = mkOption { default = pkgs.writeDashBin "slock" '' set -efu display=''${DISPLAY#:} service=slock-$LOGNAME@$display.service exec ${pkgs.systemd}/bin/systemctl start "$service" ''; type = types.package; }; user = mkOption { type = types.user; }; }; config = mkIf cfg.enable { security.polkit.extraConfig = /* js */ '' polkit.addRule(function(action, subject) { if (action.id === "org.freedesktop.systemd1.manage-units" && subject.user === ${toJSON cfg.user.name} && /^slock-${cfg.user.name}@[0-9]+\.service$/.test(action.lookup("unit")) ) { return polkit.Result.YES; } }); ''; systemd.services."slock-${cfg.user.name}@" = { environment = { DISPLAY = ":%I"; LD_PRELOAD = pkgs.runCommandCC "slock-${cfg.user.name}.so" { passAsFile = ["text"]; text = /* c */ '' #include <shadow.h> #include <unistd.h> static struct spwd entry = { .sp_namp = "", .sp_pwdp = ${toC config.users.users.${cfg.user.name}.hashedPassword}, .sp_lstchg = 0, .sp_min = 0, .sp_max = 0, .sp_warn = 0, .sp_inact = 0, .sp_expire = 0, .sp_flag = 0, }; extern struct spwd *getspnam(const char *name) { return &entry; } extern int setgroups(size_t size, const gid_t *list) { return 0; } extern int setgid(gid_t gid) { return 0; } extern int setuid(uid_t uid) { return 0; } ''; } /* sh */ '' gcc -Wall -shared -o $out -xc "$textPath" ''; }; restartIfChanged = false; serviceConfig = { ExecStart = "${pkgs.slock}/bin/slock"; OOMScoreAdjust = -1000; Restart = "on-failure"; RestartSec = "100ms"; StartLimitBurst = 0; SyslogIdentifier = "slock"; User = cfg.user.name; }; }; }; }