nixpkgs/nixos/modules/services/security/haveged.nix
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00

63 lines
1.1 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.haveged;
in
{
###### interface
options = {
services.haveged = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable to haveged entropy daemon, which refills
/dev/random when low.
'';
};
refill_threshold = mkOption {
type = types.int;
default = 1024;
description = ''
The number of bits of available entropy beneath which
haveged should refill the entropy pool.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
systemd.services.haveged =
{ description = "Entropy Harvesting Daemon";
unitConfig.documentation = "man:haveged(8)";
wantedBy = [ "multi-user.target" ];
path = [ pkgs.haveged ];
serviceConfig =
{ Type = "forking";
ExecStart = "${pkgs.haveged}/sbin/haveged -w ${toString cfg.refill_threshold} -v 1";
PIDFile = "/run/haveged.pid";
};
};
};
}