[DGD] Re: Undefined function hook

[Mikael Lind]

Hello again,

To answer my own question about security implications, one is that the
redefined call_other() will be considered a privileged call by the
system. Here is another attempt:

# include <kernel/kernel.h>

private string creator(string path)
{
    return ::call_other(DRIVER, "creator", path);
}

static mixed call_other(mixed obj, string func, mixed args...)
{
    string prog;

    if (typeof(obj) == T_STRING) {
        /* find or compile named object */
    }
    prog = function_object(func, obj);
    if (prog && creator(prog) == "System") return nil;
    return prog ? ::call_other(obj, func, args...)
        : ::call_other(obj, "call_missing", func, args...);
}

Regards,
Mikael