ee090cd808
Add an option for physlock's -m flag, which mutes kernel messages on the console. This ensures that the password prompt is the only thing on the screen and isn't lost in a flood of kernel messages.
148 lines
3.9 KiB
Nix
148 lines
3.9 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.physlock;
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in
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{
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###### interface
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options = {
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services.physlock = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Whether to enable the {command}`physlock` screen locking mechanism.
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Enable this and then run {command}`systemctl start physlock`
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to securely lock the screen.
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This will switch to a new virtual terminal, turn off console
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switching and disable SysRq mechanism (when
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{option}`services.physlock.disableSysRq` is set)
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until the root or user password is given.
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'';
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};
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allowAnyUser = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Whether to allow any user to lock the screen. This will install a
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setuid wrapper to allow any user to start physlock as root, which
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is a minor security risk. Call the physlock binary to use this instead
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of using the systemd service.
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'';
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};
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disableSysRq = mkOption {
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type = types.bool;
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default = true;
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description = lib.mdDoc ''
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Whether to disable SysRq when locked with physlock.
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'';
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};
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lockMessage = mkOption {
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type = types.str;
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default = "";
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description = lib.mdDoc ''
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Message to show on physlock login terminal.
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'';
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};
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muteKernelMessages = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Disable kernel messages on console while physlock is running.
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'';
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};
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lockOn = {
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suspend = mkOption {
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type = types.bool;
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default = true;
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description = lib.mdDoc ''
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Whether to lock screen with physlock just before suspend.
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'';
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};
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hibernate = mkOption {
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type = types.bool;
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default = true;
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description = lib.mdDoc ''
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Whether to lock screen with physlock just before hibernate.
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'';
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};
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extraTargets = mkOption {
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type = types.listOf types.str;
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default = [];
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example = [ "display-manager.service" ];
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description = lib.mdDoc ''
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Other targets to lock the screen just before.
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Useful if you want to e.g. both autologin to X11 so that
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your {file}`~/.xsession` gets executed and
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still to have the screen locked so that the system can be
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booted relatively unattended.
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'';
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};
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable (mkMerge [
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{
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# for physlock -l and physlock -L
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environment.systemPackages = [ pkgs.physlock ];
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systemd.services.physlock = {
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enable = true;
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description = "Physlock";
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wantedBy = optional cfg.lockOn.suspend "suspend.target"
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++ optional cfg.lockOn.hibernate "hibernate.target"
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++ cfg.lockOn.extraTargets;
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before = optional cfg.lockOn.suspend "systemd-suspend.service"
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++ optional cfg.lockOn.hibernate "systemd-hibernate.service"
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++ optional (cfg.lockOn.hibernate || cfg.lockOn.suspend) "systemd-suspend-then-hibernate.service"
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++ cfg.lockOn.extraTargets;
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serviceConfig = {
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Type = "forking";
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ExecStart = "${pkgs.physlock}/bin/physlock -d${optionalString cfg.muteKernelMessages "m"}${optionalString cfg.disableSysRq "s"}${optionalString (cfg.lockMessage != "") " -p \"${cfg.lockMessage}\""}";
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};
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};
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security.pam.services.physlock = {};
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}
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(mkIf cfg.allowAnyUser {
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security.wrappers.physlock =
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{ setuid = true;
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owner = "root";
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group = "root";
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source = "${pkgs.physlock}/bin/physlock";
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};
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})
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]);
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}
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