VALID_OVERRIDE(4)

NAME
valid_override - controls the use of efun::

SYNOPSIS
int valid_override(string file, string efun_name);

DESCRIPTION
Add valid_override to master.c in order to control the use of the efun:: prefix. The valid_override function in master.c will be called each time the driver attempts to compile a function call that begins with efun::. If valid_override returns 0, then that compile will fail. Thus valid_override provides a way to modify the behavior of efuns that isn't circumventable via the efun:: prefix (by having a simul_efun of the same name as the efun to be modified and having valid_override disallow that simul_efun from being overriden).

If you wish to have the original 3.1.2 efun:: behavior, simply add a line to master.c that looks like this:

int valid_override(string file, string efun) { return 1; }

Here is an example valid_override that is more restrictive:

  int
  valid_override(string file, string name)
  {
      if (file == "/adm/obj/simul_efun") {
          return 1;
      }
      if (name == "destruct")
          return 0;
      if (name == "shutdown")
          return 0;
      if (name == "snoop")
          return 0;
      if (name == "exec")
          return 0;
      return 1;
   }

AUTHOR
Truilkan@Basis

SEE ALSO
valid_object(4)