Bug 117977

Summary:	Cannot login with 32-bit UID's
Product:	[openSUSE] SUSE LINUX 10.0	Reporter:	Charl Möller <cwmoller>
Component:	X.Org	Assignee:	Stefan Dirsch <sndirsch>
Status:	RESOLVED FIXED	QA Contact:	Stefan Dirsch <sndirsch>
Severity:	Normal
Priority:	P3 - Medium	CC:	eich, kukuk, werner
Version:	unspecified
Target Milestone:	---
Hardware:	32bit
OS:	Novell Linux Desktop 9 SP2
Whiteboard:
Found By:	Other	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Charl Möller 2005-09-20 11:18:24 UTC

The following have to be true:

1 - you have a 32-bit UID ( values greater than 65536 )
2 - you want to create a new X session

In /etc/X11/Xstartup you have to change the line containing 'sessreg'. Adding '-
L none' before the '-U $user' will enable login.

It seems that sessreg does not correctly write the lastlog entry for 32-bit 
UID's. Adding the '-L none' disables it's attempt to write this entry.

Comment 1 Stefan Dirsch 2005-09-20 13:24:17 UTC

This looks more like an ugly workaround than a fix. Thorsten, do we meanwhile 
support 32bit UIDs? IIRC we discussed this issue (in the dist meeting) and the 
conclusion was, that we simply does not support it (yet). But this is some 
years ago and things might have changed ...

Comment 2 Thorsten Kukuk 2005-09-20 13:58:33 UTC

We discussed if we should support unsigned int or only signed int for
UID. The kernel uses unsigned int, most of our applications works with
unsigned int UIDs, too.

Comment 3 Thorsten Kukuk 2005-09-20 13:59:07 UTC

signed int UIDs should work, unsigned int UIDs would be fine.

Comment 4 Stefan Dirsch 2005-09-20 14:19:49 UTC

Ok. From this point of view sessreg looks broken. :-(

Comment 5 Stefan Dirsch 2006-09-01 05:27:08 UTC

Could you check this issue with openSUSE >= Alpha3 again?

Comment 6 Charl Möller 2006-09-01 06:05:09 UTC

(In reply to comment #5)
> Could you check this issue with openSUSE >= Alpha3 again?

Unfortunately I can't. I am in South Africa, and bandwidth to download Alpha versions of distros is simply not available.

The bug is very easy to reproduce:
1. Create a new user with a UID 8 digits long (12345678)
2. Log in to X

If login succeeds, the bug is fixed, else the X session dies and you are returned to the login manager.

Comment 7 Stefan Dirsch 2006-09-01 08:20:23 UTC

Looks like this has been fixed meanwhile (tested with openSUSE 10.2 Alpha3). 
I created a new user with UID 12345678 and could log in without any problems.

But the sessreg call in /etc/X11/xdm/Xstartup seems to differ from what you described in comment #1, but didn't change since 10.0!

exec ${BINDIR}/sessreg -l $LINE -h $LOCATION -a $USER

There's no '-U $user'. The '-U' option even doesn't exist. Maybe you're using your own xdm configuration?

Anyway, finally closing as fixed.