diff --git a/inout.c b/inout.c
index d59bf274..23d69158 100644
--- a/inout.c
+++ b/inout.c
@@ -5,7 +5,7 @@
 ** Also provides some predefined lua functions.
 */
 
-char *rcs_inout="$Id: inout.c,v 2.25 1995/10/25 13:05:51 roberto Exp roberto $";
+char *rcs_inout="$Id: inout.c,v 2.26 1996/01/22 17:40:00 roberto Exp roberto $";
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -54,9 +54,9 @@ static int stringinput (void)
 
 /*
 ** Function to open a file to be input unit. 
-** Return 0 on success or error message on error.
+** Return 0 on success or 1 error.
 */
-char *lua_openfile (char *fn)
+int lua_openfile (char *fn)
 {
  lua_setinput (fileinput);
  if (fn == NULL)
@@ -67,14 +67,10 @@ char *lua_openfile (char *fn)
  else
    fp = fopen (fn, "r");
  if (fp == NULL)
- {
-   static char buff[255];
-   sprintf(buff, "unable to open file `%.200s'", fn);
-   return buff;
- }
+   return 1;
  lua_linenumber = 1;
  lua_parsedfile = lua_constcreate(fn)->ts.str;
- return NULL;
+ return 0;
 }
 
 /*
@@ -231,3 +227,28 @@ void luaI_error (void)
   lua_error(s);
 }
 
+void luaI_assert (void)
+{
+  lua_Object p = lua_getparam(1);
+  if (p == LUA_NOOBJECT || lua_isnil(p))
+    lua_error("assertion failed!");
+}
+
+void luaI_setglobal (void)
+{
+  lua_Object name = lua_getparam(1);
+  lua_Object value = lua_getparam(2);
+  if (!lua_isstring(name))
+    lua_error("incorrect argument to function `setglobal'");
+  lua_pushobject(value);
+  lua_storeglobal(lua_getstring(name));
+  lua_pushobject(value);  /* return given value */
+}
+
+void luaI_getglobal (void)
+{
+  lua_Object name = lua_getparam(1);
+  if (!lua_isstring(name))
+    lua_error("incorrect argument to function `getglobal'");
+  lua_pushobject(lua_getglobal(lua_getstring(name)));
+}
diff --git a/inout.h b/inout.h
index e145c341..2ad80308 100644
--- a/inout.h
+++ b/inout.h
@@ -1,5 +1,5 @@
 /*
-** $Id: inout.h,v 1.10 1995/10/17 11:58:41 roberto Exp roberto $
+** $Id: inout.h,v 1.11 1996/01/22 17:40:00 roberto Exp roberto $
 */
 
 
@@ -14,7 +14,7 @@ extern Bool lua_debug;
 extern Word lua_debugline;
 extern char *lua_parsedfile;
 
-char *lua_openfile     (char *fn);
+int  lua_openfile     (char *fn);
 void lua_closefile    (void);
 void lua_openstring   (char *s);
 void lua_closestring  (void);
@@ -26,5 +26,8 @@ void    luaI_print      (void);
 void    luaI_type       (void);
 void    lua_obj2number (void);
 void	luaI_error     (void);
+void    luaI_assert    (void);
+void	luaI_setglobal (void);
+void	luaI_getglobal (void);
 
 #endif