nixpkgs/modules/services/ttys/mingetty.nix

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{ config, pkgs, ... }:
with pkgs.lib;
{
###### interface
options = {
services.mingetty = {
ttys = mkOption {
default =
if pkgs.stdenv.isArm
then [ "ttyS0" ] # presumably an embedded platform such as a plug
else [ "tty1" "tty2" "tty3" "tty4" "tty5" "tty6" ];
description = ''
The list of tty devices on which to start a login prompt.
'';
};
waitOnMounts = mkOption {
default = false;
description = ''
Whether the login prompts on the virtual consoles will be
started before or after all file systems have been mounted. By
default we don't wait, but if for example your /home is on a
separate partition, you may want to turn this on.
'';
};
greetingLine = mkOption {
default = ''<<< Welcome to NixOS ${config.system.nixosVersion} (\m) - \l >>>'';
description = ''
Welcome line printed by mingetty.
'';
};
helpLine = mkOption {
default = "";
description = ''
Help line printed by mingetty below the welcome line.
Used by the installation CD to give some hints on
how to proceed.
'';
};
};
};
###### implementation
config = {
# Generate a separate job for each tty.
jobs = listToAttrs (map (tty: nameValuePair tty {
startOn =
# On tty1 we should always wait for mountall, since it may
# start an emergency-shell job.
if config.services.mingetty.waitOnMounts || tty == "tty1"
then "stopped udevtrigger and filesystem"
else "stopped udevtrigger"; # !!! should start as soon as the tty device is created
path = [ pkgs.mingetty ];
exec = "mingetty --loginprog=${pkgs.shadow}/bin/login --noclear ${tty}";
restartIfChanged = false;
environment.LOCALE_ARCHIVE = "/run/current-system/sw/lib/locale/locale-archive";
}) config.services.mingetty.ttys);
environment.etc = singleton
{ # Friendly greeting on the virtual consoles.
source = pkgs.writeText "issue" ''
${config.services.mingetty.greetingLine}
${config.services.mingetty.helpLine}
'';
target = "issue";
};
};
}