nixpkgs/modules/config/nsswitch.nix
2012-10-06 20:58:46 -04:00

74 lines
1.9 KiB
Nix

# Configuration for the Name Service Switch (/etc/nsswitch.conf).
{ config, pkgs, ... }:
with pkgs.lib;
let
options = {
# NSS modules. Hacky!
system.nssModules = mkOption {
internal = true;
default = [];
description = "
Search path for NSS (Name Service Switch) modules. This allows
several DNS resolution methods to be specified via
<filename>/etc/nsswitch.conf</filename>.
";
merge = mergeListOption;
apply = list:
let
list2 =
list
# !!! this should be in the LDAP module
++ optional config.users.ldap.enable pkgs.nss_ldap;
in {
list = list2;
path = makeLibraryPath list2;
};
};
};
inherit (config.services.avahi) nssmdns;
in
{
require = [ options ];
environment.etc =
[ # Name Service Switch configuration file. Required by the C library.
# !!! Factor out the mdns stuff. The avahi module should define
# an option used by this module.
{ source = pkgs.writeText "nsswitch.conf"
''
passwd: files ldap
group: files ldap
shadow: files ldap
hosts: files ${optionalString nssmdns "mdns_minimal [NOTFOUND=return]"} dns ${optionalString nssmdns "mdns"}
networks: files dns
ethers: files
services: files
protocols: files
'';
target = "nsswitch.conf";
}
];
environment.shellInit =
if config.system.nssModules.path != "" then
''
LD_LIBRARY_PATH=${config.system.nssModules.path}:$LD_LIBRARY_PATH
''
else "";
# NSS modules need to be in `systemPath' so that (i) the builder
# chroot gets to seem them, and (ii) applications can benefit from
# changes in the list of NSS modules at run-time, without requiring
# a reboot.
environment.systemPackages = [ config.system.nssModules.list ];
}