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nixpkgs/nixos/modules/services/networking/xinetd.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

159 lines
3.6 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.xinetd;
inherit (pkgs) xinetd;
configFile = pkgs.writeText "xinetd.conf"
''
defaults
{
log_type = SYSLOG daemon info
log_on_failure = HOST
log_on_success = PID HOST DURATION EXIT
${cfg.extraDefaults}
}
${concatMapStrings makeService cfg.services}
'';
makeService = srv:
''
service ${srv.name}
{
protocol = ${srv.protocol}
${optionalString srv.unlisted "type = UNLISTED"}
${optionalString (srv.flags != "") "flags = ${srv.flags}"}
socket_type = ${if srv.protocol == "udp" then "dgram" else "stream"}
${if srv.port != 0 then "port = ${toString srv.port}" else ""}
wait = ${if srv.protocol == "udp" then "yes" else "no"}
user = ${srv.user}
server = ${srv.server}
${optionalString (srv.serverArgs != "") "server_args = ${srv.serverArgs}"}
${srv.extraConfig}
}
'';
in
{
###### interface
options = {
services.xinetd.enable = mkOption {
default = false;
description = ''
Whether to enable the xinetd super-server daemon.
'';
};
services.xinetd.extraDefaults = mkOption {
default = "";
type = types.string;
description = ''
Additional configuration lines added to the default section of xinetd's configuration.
'';
};
services.xinetd.services = mkOption {
default = [];
description = ''
A list of services provided by xinetd.
'';
type = types.listOf types.optionSet;
options = {
name = mkOption {
type = types.string;
example = "login";
description = "Name of the service.";
};
protocol = mkOption {
type = types.string;
default = "tcp";
description =
"Protocol of the service. Usually <literal>tcp</literal> or <literal>udp</literal>.";
};
port = mkOption {
type = types.int;
default = 0;
example = 123;
description = "Port number of the service.";
};
user = mkOption {
type = types.string;
default = "nobody";
description = "User account for the service";
};
server = mkOption {
type = types.string;
example = "/foo/bin/ftpd";
description = "Path of the program that implements the service.";
};
serverArgs = mkOption {
type = types.string;
default = "";
description = "Command-line arguments for the server program.";
};
flags = mkOption {
type = types.string;
default = "";
description = "";
};
unlisted = mkOption {
type = types.bool;
default = false;
description = ''
Whether this server is listed in
<filename>/etc/services</filename>. If so, the port
number can be omitted.
'';
};
extraConfig = mkOption {
type = types.string;
default = "";
description = "Extra configuration-lines added to the section of the service.";
};
};
};
};
###### implementation
config = mkIf cfg.enable {
jobs.xinetd =
{ description = "xinetd server";
startOn = "started network-interfaces";
stopOn = "stopping network-interfaces";
path = [ xinetd ];
exec = "xinetd -syslog daemon -dontfork -stayalive -f ${configFile}";
};
};
}