lkml.org 
[lkml]   [2000]   [Jan]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Linux 2.3.39 has 32bit uid. What about 32bit pid?
Date
From
> I think we should change __kernel_pid_t now that we are changing __kernel_uid_t.
>
> a) It is easy - easier than the change to larger uid.
> Roughly speaking the only change is in the ipc structs.
> (The other part of the change is in /proc.)

Do libc5 and glibc give the illusion of a 32bit pid - I thought they didnt

> b) The reuse of pids causes security problems.

No.. people cause security problems.

> get_pid() {
> return ++last_pid;
> }

That loses your security advantage

> (On the other hand, if we do not enlarge the pid_t size, then
> a bitmap with pids_in_use would make get_pid() much faster.)

ffz() on pids_in_use yep..

Alan


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:55    [W:0.199 / U:0.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site