nixpkgs/modules/services/system/nscd.nix

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{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";
};
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boot.systemd.services.nscd =
{ description = "Name Service Cache Daemon";
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wantedBy = [ "multi-user.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
'';
serviceConfig =
{ ExecStart = "@${pkgs.glibc}/sbin/nscd nscd -f ${./nscd.conf}";
Type = "forking";
PIDFile = "/run/nscd/nscd.pid";
Restart = "always";
ExecReload =
[ "${pkgs.glibc}/sbin/nscd --invalidate passwd"
"${pkgs.glibc}/sbin/nscd --invalidate group"
"${pkgs.glibc}/sbin/nscd --invalidate hosts"
];
};
};
};
}