--- a/src/client/CMakeLists.txt	Sun Oct 18 09:42:33 2015 -0400
+++ b/src/client/CMakeLists.txt	Sun Oct 18 09:43:04 2015 -0400
@@ -25,6 +25,7 @@
 	cmds.c
 
 	# assorted RPC handlers
+	cmd_login.c
 	cmd_nop.c
 )
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/client/cmd_login.c	Sun Oct 18 09:43:04 2015 -0400
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2015 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <nomad/error.h>
+
+#include "cmds.h"
+
+int cmd_login(union cmd *cmd)
+{
+	return ENOTSUP;
+}

--- a/src/client/cmds.c	Sun Oct 18 09:42:33 2015 -0400
+++ b/src/client/cmds.c	Sun Oct 18 09:43:04 2015 -0400
@@ -20,6 +20,8 @@
  * SOFTWARE.
  */
 
+#include <stddef.h>
+
 #include <nomad/error.h>
 #include <nomad/rpc_fs.h>
 
@@ -32,6 +34,17 @@
 		.handler = (hndlr),			\
 	}
 
+#define CMD_ARG_RET(op, what, hndlr)			\
+	{						\
+		.name = #op,				\
+		.opcode = (op),				\
+		.handler = (hndlr),			\
+		.reqoff = offsetof(union cmd, what.req),\
+		.resoff = offsetof(union cmd, what.res),\
+		.req = (void *) xdr_rpc_##what##_req,	\
+		.res = (void *) xdr_rpc_##what##_res,	\
+	}
+
 static const struct cmdtbl {
 	const char *name;
 	uint16_t opcode;
@@ -46,6 +59,7 @@
 	bool_t (*req)(XDR *, void *);
 	bool_t (*res)(XDR *, void *);
 } cmdtbl[] = {
+	CMD_ARG_RET(NRPC_LOGIN,         login,         cmd_login),
 	CMD        (NRPC_NOP,           nop,           cmd_nop),
 };
 

--- a/src/client/cmds.h	Sun Oct 18 09:42:33 2015 -0400
+++ b/src/client/cmds.h	Sun Oct 18 09:43:04 2015 -0400
@@ -26,12 +26,19 @@
 #include <nomad/rpc_fs.h>
 
 union cmd {
+	/* login */
+	struct {
+		struct rpc_login_req req;
+		struct rpc_login_res res;
+	} login;
+
 	/* nop - no req & no res */
 };
 
 extern bool process_connection(int fd);
 
 /* RPC handlers */
+extern int cmd_login(union cmd *cmd);
 extern int cmd_nop(union cmd *cmd);
 
 #endif