lkml.org 
[lkml]   [1999]   [May]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Migrating to larger numbers
Date
Nicholas Tufar enscribed thusly:
> On 27 May 1999, H. Peter Anvin wrote:

> > Okay, 2.3 is out; it's time to get some fundamental data types
> > expanded:

> > REQUIRED:

> > uid_t, gid_t: 32 bits minimum, 32 bits probably OK.

> Some ISPs and mail servers may have more than 65536 users on one system.
> I would propose to make uid_t and gid_t 64 bits.

Huh?

16 bits => 65536 users (Current)
32 bits => 4,294,967,296 users (including 0 and -1)

4 Billion user id's is not enough?

(Putting on my Samba Development Team hat now)... One possible
reason for going to 64 bit uid_t and gid_t would be to aid mapping Windows
global ids to Unix uids and gids. The Windows IDs include information about
the domain they're a part of. Windows IDs are also used for groups,
users (a group ID is just another user ID - which is not a bad idea),
and machines. Mapping them is a major pain. That would be important
for ntfs as well as samba.

> Nicholas

Mike
--
Michael H. Warfield | (770) 985-6132 | mhw@WittsEnd.com
(The Mad Wizard) | (770) 925-8248 | http://www.wittsend.com/mhw/
NIC whois: MHW9 | An optimist believes we live in the best of all
PGP Key: 0xDF1DD471 | possible worlds. A pessimist is sure of it!


-
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 13:52    [W:0.067 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site