nixpkgs/modules/services/system/nscd.nix
Eelco Dolstra 4475294f57 Fix a hang during shutdown
Subtle: dhcpcd.service would call resolvconf during shutdown, which in
turn would start invalidate-nscd.service, causing the shutdown to be
cancelled.  Instead, give nscd.service a proper reload action, and do
"systemctl reload --no-block nscd.service".  The --no-block is
necessary to prevent that command from waiting until a timeout occurs
(bug in systemd?).
2012-08-14 16:45:50 -04:00

70 lines
1.1 KiB
Nix

{pkgs, config, ...}:
with pkgs.lib;
let
nssModulesPath = config.system.nssModules.path;
inherit (pkgs.lib) singleton;
in
{
###### interface
options = {
services.nscd = {
enable = mkOption {
default = true;
description = "Whether to enable the Name Service Cache Daemon.";
};
};
};
###### implementation
config = mkIf config.services.nscd.enable {
users.extraUsers = singleton
{ name = "nscd";
uid = config.ids.uids.nscd;
description = "Name service cache daemon user";
};
jobs.nscd =
{ description = "Name Service Cache Daemon";
startOn = "startup";
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
'';
path = [ pkgs.glibc ];
exec = "nscd -f ${./nscd.conf}";
daemonType = "fork";
serviceConfig =
''
PIDFile=/run/nscd/nscd.pid
ExecReload=${pkgs.glibc}/sbin/nscd --invalidate hosts
'';
};
};
}