nixpkgs/modules/services/networking/ddclient.nix

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{pkgs, config, ...}:
let
inherit (pkgs.lib) mkOption mkIf singleton;
inherit (pkgs) ddclient;
stateDir = "/var/spool/ddclient";
ddclientUser = "ddclient";
modprobe = config.system.sbin.modprobe;
ddclientFlags = "-foreground -file ${ddclientCfg}";
ddclientCfg = pkgs.writeText "ddclient.conf" ''
daemon=600
cache=${stateDir}/ddclient.cache
pid=${stateDir}/ddclient.pid
use=${config.services.ddclient.web}
login=${config.services.ddclient.username}
password=${config.services.ddclient.password}
protocol=${config.services.ddclient.protocol}
server=${config.services.ddclient.server}
wildcard=YES
${config.services.ddclient.domain}
${config.services.ddclient.extraConfig}
'';
in
{
###### interface
options = {
services.ddclient = {
enable = mkOption {
default = false;
description = ''
Whether to synchronise your machine's IP address with a dynamic DNS provider (e.g. dyndns.org).
'';
};
domain = mkOption {
default = "";
description = ''
Domain name to synchronize.
'';
};
username = mkOption {
default = "";
description = ''
Username.
'';
};
password = mkOption {
default = "" ;
description = ''
Password.
'';
};
protocol = mkOption {
default = "dyndns2" ;
description = ''
Protocol to use with dynamic DNS provider. (see also, http://sourceforge.net/apps/trac/ddclient/wiki/Protocols)
'';
};
server = mkOption {
default = "members.dyndns.org" ;
description = ''
Server
'';
};
extraConfig = mkOption {
default = "" ;
description = ''
Extra configuration. Contents will be added verbatim to the configuration file.
'';
};
web = mkOption {
default = "web, web=checkip.dyndns.com/, web-skip='IP Address'" ;
description = ''
'';
};
};
};
###### implementation
config = mkIf config.services.ddclient.enable {
environment.systemPackages = [ ddclient ];
users.extraUsers = singleton
{ name = ddclientUser;
uid = config.ids.uids.ddclient;
description = "ddclient daemon user";
home = stateDir;
};
jobs = singleton {
name = "ddclient";
startOn = "startup";
stopOn = "shutdown";
preStart = ''
mkdir -m 0755 -p ${stateDir}
chown ${ddclientUser} ${stateDir}
# Needed to run ddclient as an unprivileged user.
${modprobe}/sbin/modprobe capability || true
'';
script = ''
${ddclient}/bin/ddclient ${ddclientFlags}
'';
};
};
}