push sheeet

nixos/modules/services/ttys/getty.nix

@@ -0,0 +1,217 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+with lib;
+
+let
+  cfg = config.services.getty;
+
+  baseArgs = [
+    "--login-program"
+    "${cfg.loginProgram}"
+  ]
+  ++ optionals (cfg.autologinUser != null && !cfg.autologinOnce) [
+    "--autologin"
+    cfg.autologinUser
+  ]
+  ++ optionals (cfg.loginOptions != null) [
+    "--login-options"
+    cfg.loginOptions
+  ]
+  ++ cfg.extraArgs;
+
+  gettyCmd = args: "${lib.getExe' pkgs.util-linux "agetty"} ${escapeShellArgs baseArgs} ${args}";
+
+  autologinScript = ''
+    otherArgs="--noclear --keep-baud $TTY 115200,38400,9600 $TERM";
+    ${lib.optionalString cfg.autologinOnce ''
+      autologged="/run/agetty.autologged"
+      if test "$TTY" = tty1 && ! test -f "$autologged"; then
+        touch "$autologged"
+        exec ${gettyCmd "$otherArgs --autologin ${cfg.autologinUser}"}
+      fi
+    ''}
+    exec ${gettyCmd "$otherArgs"}
+  '';
+
+in
+
+{
+
+  ###### interface
+
+  imports = [
+    (mkRenamedOptionModule [ "services" "mingetty" ] [ "services" "getty" ])
+    (mkRemovedOptionModule [ "services" "getty" "serialSpeed" ]
+      ''set non-standard baudrates with `boot.kernelParams` i.e. boot.kernelParams = ["console=ttyS2,1500000"];''
+    )
+  ];
+
+  options = {
+
+    services.getty = {
+
+      autologinUser = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = ''
+          Username of the account that will be automatically logged in at the console.
+          If unspecified, a login prompt is shown as usual.
+        '';
+      };
+
+      autologinOnce = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          If enabled the automatic login will only happen in the first tty
+          once per boot. This can be useful to avoid retyping the account
+          password on systems with full disk encrypted.
+        '';
+      };
+
+      loginProgram = mkOption {
+        type = types.path;
+        default = "${pkgs.shadow}/bin/login";
+        defaultText = literalExpression ''"''${pkgs.shadow}/bin/login"'';
+        description = ''
+          Path to the login binary executed by agetty.
+        '';
+      };
+
+      loginOptions = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = ''
+          Template for arguments to be passed to
+          {manpage}`login(1)`.
+
+          See {manpage}`agetty(1)` for details,
+          including security considerations.  If unspecified, agetty
+          will not be invoked with a {option}`--login-options`
+          option.
+        '';
+        example = "-h darkstar -- \\u";
+      };
+
+      extraArgs = mkOption {
+        type = types.listOf types.str;
+        default = [ ];
+        description = ''
+          Additional arguments passed to agetty.
+        '';
+        example = [ "--nohostname" ];
+      };
+
+      greetingLine = mkOption {
+        type = types.str;
+        description = ''
+          Welcome line printed by agetty.
+          The default shows current NixOS version label, machine type and tty.
+        '';
+      };
+
+      helpLine = mkOption {
+        type = types.lines;
+        default = "";
+        description = ''
+          Help line printed by agetty below the welcome line.
+          Used by the installation CD to give some hints on
+          how to proceed.
+        '';
+      };
+
+    };
+
+  };
+
+  ###### implementation
+
+  config = mkIf config.console.enable {
+    # Note: this is set here rather than up there so that changing
+    # nixos.label would not rebuild manual pages
+    services.getty.greetingLine = mkDefault ''<<< Welcome to ${config.system.nixos.distroName} ${config.system.nixos.label} (\m) - \l >>>'';
+    services.getty.helpLine = mkIf (
+      config.documentation.nixos.enable && config.documentation.doc.enable
+    ) "\nRun 'nixos-help' for the NixOS manual.";
+
+    systemd.additionalUpstreamSystemUnits = [
+      "getty.target"
+      "getty-pre.target"
+      "getty@.service"
+      "serial-getty@.service"
+      "console-getty.service"
+      "container-getty@.service"
+    ];
+
+    # We can't just rely on 'Conflicts=autovt@tty1.service' because
+    # 'switch-to-configuration switch' will start 'autovt@tty1.service'
+    # and kill the display manager.
+    systemd.targets.getty.wants =
+      lib.mkIf (!(config.systemd.services.display-manager.enable or false))
+        [
+          "autovt@tty1.service"
+        ];
+
+    systemd.services."getty@" = {
+      serviceConfig.ExecStart = [
+        # override upstream default with an empty ExecStart
+        ""
+        (pkgs.writers.writeDash "getty" autologinScript)
+      ];
+      environment.TTY = "%I";
+      restartIfChanged = false;
+    };
+
+    systemd.services."serial-getty@" = {
+      serviceConfig.ExecStart = [
+        "" # override upstream default with an empty ExecStart
+        (gettyCmd "%I --keep-baud $TERM")
+      ];
+      restartIfChanged = false;
+    };
+
+    systemd.services."autovt@" = {
+      serviceConfig.ExecStart = [
+        "" # override upstream default with an empty ExecStart
+        (gettyCmd "--noclear %I $TERM")
+      ];
+      restartIfChanged = false;
+    };
+
+    systemd.services."container-getty@" = {
+      serviceConfig.ExecStart = [
+        "" # override upstream default with an empty ExecStart
+        (gettyCmd "--noclear --keep-baud pts/%I 115200,38400,9600 $TERM")
+      ];
+      restartIfChanged = false;
+    };
+
+    systemd.services.console-getty = {
+      serviceConfig.ExecStart = [
+        "" # override upstream default with an empty ExecStart
+        (gettyCmd "--noclear --keep-baud console 115200,38400,9600 $TERM")
+      ];
+      serviceConfig.Restart = "always";
+      restartIfChanged = false;
+      enable = mkDefault config.boot.isContainer;
+    };
+
+    environment.etc.issue = mkDefault {
+      # Friendly greeting on the virtual consoles.
+      source = pkgs.writeText "issue" ''
+
+        ${config.services.getty.greetingLine}
+        ${config.services.getty.helpLine}
+
+      '';
+    };
+
+  };
+
+  meta.maintainers = with maintainers; [ RossComputerGuy ];
+}