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nixpkgs/nixos/modules/hardware/sensor/hddtemp.nix

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{ config, lib, pkgs, ... }:
let
inherit (lib) mkIf mkOption types;
cfg = config.hardware.sensor.hddtemp;
wrapper = pkgs.writeShellScript "hddtemp-wrapper" ''
set -eEuo pipefail
file=/var/lib/hddtemp/hddtemp.db
drives=(${toString (map (e: ''$(realpath ${lib.escapeShellArg e}) '') cfg.drives)})
cp ${pkgs.hddtemp}/share/hddtemp/hddtemp.db $file
${lib.concatMapStringsSep "\n" (e: "echo ${lib.escapeShellArg e} >> $file") cfg.dbEntries}
exec ${pkgs.hddtemp}/bin/hddtemp ${lib.escapeShellArgs cfg.extraArgs} \
--daemon \
--unit=${cfg.unit} \
--file=$file \
''${drives[@]}
'';
in
{
meta.maintainers = with lib.maintainers; [ peterhoeg ];
###### interface
options = {
hardware.sensor.hddtemp = {
enable = mkOption {
description = ''
Enable this option to support HDD/SSD temperature sensors.
'';
type = types.bool;
default = false;
};
drives = mkOption {
description = "List of drives to monitor. If you pass /dev/disk/by-path/* entries the symlinks will be resolved as hddtemp doesn't like names with colons.";
type = types.listOf types.str;
};
unit = mkOption {
description = "Celcius or Fahrenheit";
type = types.enum [ "C" "F" ];
default = "C";
};
dbEntries = mkOption {
description = "Additional DB entries";
type = types.listOf types.str;
default = [ ];
};
extraArgs = mkOption {
description = "Additional arguments passed to the daemon.";
type = types.listOf types.str;
default = [ ];
};
};
};
###### implementation
config = mkIf cfg.enable {
systemd.services.hddtemp = {
description = "HDD/SSD temperature";
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "forking";
ExecStart = wrapper;
StateDirectory = "hddtemp";
PrivateTmp = true;
ProtectHome = "tmpfs";
ProtectSystem = "strict";
};
};
};
}