Re: current->uid

SynFl00d (kernel@vdr.qc.ca)
Sun, 11 Apr 1999 16:55:05 -0400 (EDT)


> couldn't be better to use a something like this???
>
> if (current->uid == 0) {
> return 0;
> } else {
> return root_uid;
> }
>
>
> also that way, maybe, INIT will not start to complain if uid 0 is not
> the power/super user...
>
> the BIG BIG problem about this, is that script kiddies will still able
> to run exploits and so on....

Well, the exact point of using a macro would be to replace code like:

if(!current->uid){
do_root_stuff();
}

with somethig like:

if(IS_ROOT_PROCESS(current)){
do_root_stuff();
}

That way if someone does't like the idea, the macro could be defined
diffrent ways:

#ifdef DYNAMIC_ROOT_ID
#define IS_ROOT_PROCESS(P) p->uid == special_id
#else
#define IS_ROOT_PROCESS(p) !p->uid
#endif

Papi

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