nixpkgs/nixos/modules/services/ttys/gpm.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.gpm;
in
{
###### interface
options = {
services.gpm = {
enable = mkOption {
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type = types.bool;
default = false;
description = ''
Whether to enable GPM, the General Purpose Mouse daemon,
which enables mouse support in virtual consoles.
'';
};
protocol = mkOption {
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type = types.str;
default = "ps/2";
description = "Mouse protocol to use.";
};
};
};
###### implementation
config = mkIf cfg.enable {
jobs.gpm =
{ description = "General purpose mouse";
startOn = "started udev";
exec = "${pkgs.gpm}/sbin/gpm -m /dev/input/mice -t ${cfg.protocol} -D &>/dev/null";
};
};
}