Trying to resolve name of a function inside an argument list

["feigling" <feigling@...>]

Hello,

I am trying to get the name of a function which is an argument of another 
function. Here's a small example:

Lua script file contains:

##

function lua_func()
end

c_func(lua_func)

##

c_func is a function which I registered via lua_register(lua_state, 
"c_func", lua_c_func);

Now I am trying to get the string "lua_func" in the lua_c_func() C-function. 
When I was using Lua 5.0.2 I did it the following way:

##

int
lua_c_func(struct lua_State *lua_state)
{
lua_Debug ar;

if(!lua_isfunction(lua_state, 1))
{
 printf("Argument not a func\n");
 return 0;
}

lua_getinfo(lua_state, ">n", &ar);

printf("Name of function: %s\n", ar.name);

return 0;
}

##

which resulted in "Name of function: lua_func". After upgrading to Lua 5.1.2 
it doesn't seem to work that way anymore. I tried to use lua_getinfo() in 
several different ways and also tried the following:

##

int
lua_c_func(struct lua_State *lua_state)
{
lua_Debug ar;

if(!lua_isfunction(lua_state, 1))
{
 printf("Argument not a func\n");
 return 0;
}

if(!lua_getstack(lua_state, 0, &ar))
{
 printf("Unable to execute lua_getstack()\n");
 return 0;
}

printf("Name of function: %s\n", lua_getlocal(lua_state, &ar, 1));

return 0;
}

##

which resulted in "Name of function: (*temporary)" so now I am kinda 
clueless.

Would be great if somebody could give me an advise.
Thanks in advance.