nixpkgs/nixos/modules/services/system/nscd.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

80 lines
1.7 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
nssModulesPath = config.system.nssModules.path;
cfg = config.services.nscd;
inherit (pkgs.lib) singleton;
in
{
###### interface
options = {
services.nscd = {
enable = mkOption {
type = types.bool;
default = true;
description = "Whether to enable the Name Service Cache Daemon.";
};
config = mkOption {
type = types.lines;
default = builtins.readFile ./nscd.conf;
description = "Configuration to use for Name Service Cache Daemon.";
};
};
};
###### implementation
config = mkIf cfg.enable {
users.extraUsers = singleton
{ name = "nscd";
uid = config.ids.uids.nscd;
description = "Name service cache daemon user";
};
systemd.services.nscd =
{ description = "Name Service Cache Daemon";
wantedBy = [ "nss-lookup.target" "nss-user-lookup.target" ];
environment = { LD_LIBRARY_PATH = nssModulesPath; };
preStart =
''
mkdir -m 0755 -p /run/nscd
rm -f /run/nscd/nscd.pid
mkdir -m 0755 -p /var/db/nscd
'';
restartTriggers = [ config.environment.etc.hosts.source ];
serviceConfig =
{ ExecStart = "@${pkgs.glibc}/sbin/nscd nscd -f ${pkgs.writeText "nscd.conf" cfg.config}";
Type = "forking";
PIDFile = "/run/nscd/nscd.pid";
Restart = "always";
ExecReload =
[ "${pkgs.glibc}/sbin/nscd --invalidate passwd"
"${pkgs.glibc}/sbin/nscd --invalidate group"
"${pkgs.glibc}/sbin/nscd --invalidate hosts"
];
};
};
};
}