uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

nixos/modules/services/network-filesystems/rsyncd.nix

@@ -0,0 +1,128 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.services.rsyncd;
+  settingsFormat = pkgs.formats.ini { };
+  configFile = settingsFormat.generate "rsyncd.conf" cfg.settings;
+in {
+  options = {
+    services.rsyncd = {
+
+      enable = mkEnableOption "the rsync daemon";
+
+      port = mkOption {
+        default = 873;
+        type = types.port;
+        description = "TCP port the daemon will listen on.";
+      };
+
+      settings = mkOption {
+        inherit (settingsFormat) type;
+        default = { };
+        example = {
+          global = {
+            uid = "nobody";
+            gid = "nobody";
+            "use chroot" = true;
+            "max connections" = 4;
+          };
+          ftp = {
+            path = "/var/ftp/./pub";
+            comment = "whole ftp area";
+          };
+          cvs = {
+            path = "/data/cvs";
+            comment = "CVS repository (requires authentication)";
+            "auth users" = [ "tridge" "susan" ];
+            "secrets file" = "/etc/rsyncd.secrets";
+          };
+        };
+        description = ''
+          Configuration for rsyncd. See
+          <citerefentry><refentrytitle>rsyncd.conf</refentrytitle>
+          <manvolnum>5</manvolnum></citerefentry>.
+        '';
+      };
+
+      socketActivated = mkOption {
+        default = false;
+        type = types.bool;
+        description =
+          "If enabled Rsync will be socket-activated rather than run persistently.";
+      };
+
+    };
+  };
+
+  imports = (map (option:
+    mkRemovedOptionModule [ "services" "rsyncd" option ]
+    "This option was removed in favor of `services.rsyncd.settings`.") [
+      "address"
+      "extraConfig"
+      "motd"
+      "user"
+      "group"
+    ]);
+
+  config = mkIf cfg.enable {
+
+    services.rsyncd.settings.global.port = toString cfg.port;
+
+    systemd = let
+      serviceConfigSecurity = {
+        ProtectSystem = "full";
+        PrivateDevices = "on";
+        NoNewPrivileges = "on";
+      };
+    in {
+      services.rsync = {
+        enable = !cfg.socketActivated;
+        aliases = [ "rsyncd.service" ];
+
+        description = "fast remote file copy program daemon";
+        after = [ "network.target" ];
+        documentation = [ "man:rsync(1)" "man:rsyncd.conf(5)" ];
+
+        serviceConfig = serviceConfigSecurity // {
+          ExecStart =
+            "${pkgs.rsync}/bin/rsync --daemon --no-detach --config=${configFile}";
+          RestartSec = 1;
+        };
+
+        wantedBy = [ "multi-user.target" ];
+      };
+
+      services."rsync@" = {
+        description = "fast remote file copy program daemon";
+        after = [ "network.target" ];
+
+        serviceConfig = serviceConfigSecurity // {
+          ExecStart = "${pkgs.rsync}/bin/rsync --daemon --config=${configFile}";
+          StandardInput = "socket";
+          StandardOutput = "inherit";
+          StandardError = "journal";
+        };
+      };
+
+      sockets.rsync = {
+        enable = cfg.socketActivated;
+
+        description = "socket for fast remote file copy program daemon";
+        conflicts = [ "rsync.service" ];
+
+        listenStreams = [ (toString cfg.port) ];
+        socketConfig.Accept = true;
+
+        wantedBy = [ "sockets.target" ];
+      };
+    };
+
+  };
+
+  meta.maintainers = with lib.maintainers; [ ehmry ];
+
+  # TODO: socket activated rsyncd
+
+}