156 lines
4.3 KiB
Nix
156 lines
4.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.getty;
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baseArgs = [
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"--login-program" "${pkgs.shadow}/bin/login"
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] ++ optionals (cfg.autologinUser != null) [
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"--autologin" cfg.autologinUser
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] ++ optionals (cfg.loginOptions != null) [
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"--login-options" cfg.loginOptions
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] ++ cfg.extraArgs;
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gettyCmd = args:
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"@${pkgs.util-linux}/sbin/agetty agetty ${escapeShellArgs baseArgs} ${args}";
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in
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{
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###### interface
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imports = [
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(mkRenamedOptionModule [ "services" "mingetty" ] [ "services" "getty" ])
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];
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options = {
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services.getty = {
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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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loginOptions = 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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Template for arguments to be passed to
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<citerefentry><refentrytitle>login</refentrytitle>
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<manvolnum>1</manvolnum></citerefentry>.
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See <citerefentry><refentrytitle>agetty</refentrytitle>
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<manvolnum>1</manvolnum></citerefentry> for details,
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including security considerations. If unspecified, agetty
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will not be invoked with a <option>--login-options</option>
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option.
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'';
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example = "-h darkstar -- \\u";
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};
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extraArgs = mkOption {
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type = types.listOf types.str;
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default = [ ];
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description = ''
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Additional arguments passed to agetty.
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'';
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example = [ "--nohostname" ];
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};
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greetingLine = mkOption {
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type = types.str;
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description = ''
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Welcome line printed by agetty.
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The default shows current NixOS version label, machine type and tty.
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'';
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};
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helpLine = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Help line printed by agetty below the welcome line.
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Used by the installation CD to give some hints on
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how to proceed.
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'';
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};
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serialSpeed = mkOption {
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type = types.listOf types.int;
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default = [ 115200 57600 38400 9600 ];
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example = [ 38400 9600 ];
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description = ''
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Bitrates to allow for agetty's listening on serial ports. Listing more
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bitrates gives more interoperability but at the cost of long delays
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for getting a sync on the line.
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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 = {
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# Note: this is set here rather than up there so that changing
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# nixos.label would not rebuild manual pages
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services.getty.greetingLine = mkDefault ''<<< Welcome to NixOS ${config.system.nixos.label} (\m) - \l >>>'';
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systemd.services."getty@" =
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{ serviceConfig.ExecStart = [
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"" # override upstream default with an empty ExecStart
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(gettyCmd "--noclear --keep-baud %I 115200,38400,9600 $TERM")
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];
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restartIfChanged = false;
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};
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systemd.services."serial-getty@" =
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let speeds = concatStringsSep "," (map toString config.services.getty.serialSpeed); in
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{ serviceConfig.ExecStart = [
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"" # override upstream default with an empty ExecStart
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(gettyCmd "%I --keep-baud ${speeds} $TERM")
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];
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restartIfChanged = false;
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};
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systemd.services."container-getty@" =
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{ serviceConfig.ExecStart = [
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"" # override upstream default with an empty ExecStart
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(gettyCmd "--noclear --keep-baud pts/%I 115200,38400,9600 $TERM")
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];
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restartIfChanged = false;
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};
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systemd.services.console-getty =
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{ serviceConfig.ExecStart = [
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"" # override upstream default with an empty ExecStart
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(gettyCmd "--noclear --keep-baud console 115200,38400,9600 $TERM")
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];
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serviceConfig.Restart = "always";
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restartIfChanged = false;
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enable = mkDefault config.boot.isContainer;
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};
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environment.etc.issue =
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{ # Friendly greeting on the virtual consoles.
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source = pkgs.writeText "issue" ''
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[1;32m${config.services.getty.greetingLine}[0m
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${config.services.getty.helpLine}
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'';
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};
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};
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}
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