Index: projects/lua-bootloader/sys/boot/common/interp_lua.c
===================================================================
--- projects/lua-bootloader/sys/boot/common/interp_lua.c	(revision 280722)
+++ projects/lua-bootloader/sys/boot/common/interp_lua.c	(revision 280723)
@@ -1,121 +1,130 @@
 /*-
  * Copyright (c) 2014 Pedro Souza <pedrosouza@freebsd.org>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include <stand.h>
 
 #include "bootstrap.h"
 #include "interp.h"
 
 #define lua_c
 
 #include <src/lua.h>
 #include <src/ldebug.h>
 #include <src/lauxlib.h>
 #include <src/lualib.h>
 #include <lutils.h>
 
 struct interp_lua_softc {
 	lua_State	*luap;
 };
-static struct interp_lua_softc lua_softc = { 0 };
 
+static struct interp_lua_softc lua_softc;
+
+#ifdef LUA_DEBUG
 #define	LDBG(...)	do {			\
 	printf("%s(%d): ", __func__, __LINE__);	\
 	printf(__VA_ARGS__);			\
 	printf("\n");				\
 } while (0)
+#else
+#define	LDBG(...)
+#endif
 
 
 void
 interp_lua_init(void *ctx)
 {
 	lua_State *luap;
 	struct bootblk_command **cmdp;
 	struct interp_lua_softc	*softc;
 	struct env_var *ev;
 	const char *name_str, *val_str;
 	char buf[16];
 
 	softc = ctx;
+	LDBG("creating context");
 	luap = lua_create();
 	if (luap == NULL) {
-		LDBG("problem initializing the Lua interpreter");
+		printf("problem initializing the Lua interpreter\n");
+		abort();
 	}
 	softc->luap = luap;
 	register_utils(luap);
 	luaopen_base(luap);
 	luaL_requiref(luap, LUA_STRLIBNAME, luaopen_string, 1);
 	lua_pop(luap, 1);
 }
 
 int
 interp_lua_run(void *data, const char *line)
 {
 	lua_State *luap;
 	struct interp_lua_softc	*softc;
 	int argc, ret;
 	char **argv;
 
 	softc = data;
 	luap = softc->luap;
-
+	LDBG("running line...");
 	if (ldo_string(luap, line, strlen(line)) != 0)
-		LDBG("failed to execute \'%s\'", line);
+		printf("failed to parse \'%s\'\n", line);
 
 	return (0);
 }
 
 int
 interp_lua_incl(void *ctx, const char *filename)
 {
 	struct interp_lua_softc *softc;
 
 	softc = ctx;
+	LDBG("loading file %s", filename);
 
 	return (ldo_file(softc->luap, filename));
 }
 
 /*
  * To avoid conflicts, this lua interpreter uses loader.lua instead of
  * loader.rc/boot.conf to load its configurations.
  */
 int
 interp_lua_load_config(void *ctx)
 {
+	LDBG("loading config");
+
 	return (interp_lua_incl(ctx, "/boot/loader.lua"));
 }
-
 
 struct interp boot_interp_lua = {
 	.init = interp_lua_init,
 	.run = interp_lua_run,
 	.incl = interp_lua_incl,
 	.load_configs = interp_lua_load_config,
 	.context = &lua_softc
 };