os-exit.patch

Make os.exit close lua_State
Author: dubiousjim@gmail.com
Derived from: Lua 5.2 sources
Updated: 17 May 2012

If an optional second argument is true, calls lua_close before exiting, so
finalizers will be run. The Lua interpreter already calls lua_close when
exiting normally, but other applications embedding Lua may not; and you may
want this behavior when using os.exit (to force non-zero exit statuses).

This behavior cannot be provided by a library, but only by patching the Lua
source and rebuilding.


diff -urN lua-5.1.5.orig/src/loslib.c lua-5.1.5/src/loslib.c
--- lua-5.1.5.orig/src/loslib.c	2008-01-18 11:38:18.000000000 -0500
+++ lua-5.1.5/src/loslib.c	2012-05-17 12:06:50.940848174 -0400
@@ -214,7 +214,14 @@
 
 
 static int os_exit (lua_State *L) {
-  exit(luaL_optint(L, 1, EXIT_SUCCESS));
+  int status;
+  if (lua_isboolean(L, 1))
+    status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
+  else
+    status = luaL_optint(L, 1, EXIT_SUCCESS);
+  if (lua_toboolean(L, 2))
+    lua_close(L);
+  exit(status);
 }
 
 static const luaL_Reg syslib[] = {