nixpkgs/nixos/modules/services/hardware/brltty.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.brltty;
in {
options = {
services.brltty.enable = mkOption {
type = types.bool;
default = false;
description = "Whether to enable the BRLTTY daemon.";
};
};
config = mkIf cfg.enable {
systemd.services.brltty = {
description = "Braille Device Support";
unitConfig = {
Documentation = "http://mielke.cc/brltty/";
DefaultDependencies = "no";
RequiresMountsFor = "${pkgs.brltty}/var/lib/brltty";
};
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serviceConfig = {
ExecStart = "${pkgs.brltty}/bin/brltty --no-daemon";
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Type = "notify";
TimeoutStartSec = 5;
TimeoutStopSec = 10;
Restart = "always";
RestartSec = 30;
Nice = -10;
OOMScoreAdjust = -900;
ProtectHome = "read-only";
ProtectSystem = "full";
SystemCallArchitectures = "native";
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};
wants = [ "systemd-udev-settle.service" ];
after = [ "local-fs.target" "systemd-udev-settle.service" ];
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before = [ "sysinit.target" ];
wantedBy = [ "sysinit.target" ];
};
};
}