90 lines
2 KiB
Nix
90 lines
2 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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nssModulesPath = config.system.nssModules.path;
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cfg = config.services.nscd;
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inherit (lib) singleton;
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cfgFile = pkgs.writeText "nscd.conf" cfg.config;
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in
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{
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###### interface
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options = {
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services.nscd = {
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enable = mkOption {
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type = types.bool;
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default = true;
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description = "Whether to enable the Name Service Cache Daemon.";
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};
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config = mkOption {
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type = types.lines;
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default = builtins.readFile ./nscd.conf;
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description = "Configuration to use for Name Service Cache Daemon.";
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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users.extraUsers = singleton
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{ name = "nscd";
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uid = config.ids.uids.nscd;
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description = "Name service cache daemon user";
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};
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systemd.services.nscd =
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{ description = "Name Service Cache Daemon";
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wantedBy = [ "nss-lookup.target" "nss-user-lookup.target" ];
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environment = { LD_LIBRARY_PATH = nssModulesPath; };
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preStart =
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''
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mkdir -m 0755 -p /run/nscd
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rm -f /run/nscd/nscd.pid
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mkdir -m 0755 -p /var/db/nscd
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'';
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restartTriggers = [ config.environment.etc.hosts.source config.environment.etc."nsswitch.conf".source ];
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serviceConfig =
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{ ExecStart = "@${pkgs.glibc}/sbin/nscd nscd -f ${cfgFile}";
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Type = "forking";
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PIDFile = "/run/nscd/nscd.pid";
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Restart = "always";
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ExecReload =
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[ "${pkgs.glibc}/sbin/nscd --invalidate passwd"
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"${pkgs.glibc}/sbin/nscd --invalidate group"
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"${pkgs.glibc}/sbin/nscd --invalidate hosts"
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];
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};
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# Urgggggh... Nscd forks before opening its socket and writing
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# its pid. So wait until it's ready.
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postStart =
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''
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while ! ${pkgs.glibc}/sbin/nscd -g -f ${cfgFile} > /dev/null; do
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sleep 0.2
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done
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'';
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};
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};
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}
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