Unusual sudo / w behaviour - 0 users?

[Tom McLaughlin]

On Sun, 2007-07-22 at 19:45 +1000, Paul Fraser wrote:
> Hi Tom (and ports list by CC),
> 
> After an upgrade to sudo v1.6.9 on my 6-STABLE workstation, I've
> noticed some interesting behaviour with regards to interaction between
> sudo and w.
> 
> Check the output below for an example.
> 
> [pfraser at odyssey ~]$ sudo -V
> Sudo version 1.6.9
> [pfraser at odyssey ~]$ w
>  7:42PM  up 8 days,  7:46, 1 user, load averages: 0.11, 0.10, 0.15
> USER             TTY      FROM              LOGIN@  IDLE WHAT
> pfraser          p0       core-server01     7:38PM     - w
> [pfraser at odyssey ~]$ sudo -s
> Last login: Sun Jul 22 19:36:22 on ttyp1
> [root at odyssey ~]# w
>  7:42PM  up 8 days,  7:46, 0 users, load averages: 0.10, 0.09, 0.15
> USER             TTY      FROM              LOGIN@  IDLE WHAT
> [root at odyssey ~]#
> 
> Note there is now no active session listed? If I then drop out of the
> sudo session, the problem persists.
> 
> [root at odyssey ~]# exit
> exit
> [pfraser at odyssey ~]$ w
>  7:44PM  up 8 days,  7:47, 0 users, load averages: 0.27, 0.15, 0.17
> USER             TTY      FROM              LOGIN@  IDLE WHAT
> [pfraser at odyssey ~]$
> 
> I'm afraid I'm not familiar enough with the inner workings of all the
> related systems and can't be of much more assistance (at least
> initially), but I'm quite welcome to perform any testing you require.
> You may just need to hold my hand a little bit!
> 

I'm not sure if this is a sudo bug or a -STABLE bug.  I can only
reproduce this on -STABLE with sudo 1.6.9.  -CURRENT with 1.6.9 and
1.6.8p12 works fine and -STABLE with sudo 1.6.8p12 works fine.  I did a
little more experimenting and saw this behavior below.

-STABLE:
[tom at releng-6-fbsd tom]$ last
tom              ttyp2    bofh             Sun Jul 22 16:16   still logged in
...
[tom at releng-6-fbsd tom]$ sudo -s
# last | head -n 5
root             ttyp2                     Sun Jul 22 16:16 - 16:16  (00:00)
tom              ttyp2    bofh             Sun Jul 22 16:16 - 16:16  (00:00)
...
# ^D
[tom at releng-6-fbsd tom]$ last
root             ttyp2                     Sun Jul 22 16:16 - 16:16  (00:00)
tom              ttyp2    bofh             Sun Jul 22 16:16 - 16:16  (00:00)


-CURRENT:
[tom at releng-7-fbsd tom]$ last
tom              ttyp1    bofh             Sun Jul 22 16:18   still logged in
...
[tom at releng-7-fbsd tom]$ sudo -s
# last | head -n 6 
tom              ttyp1    bofh             Sun Jul 22 16:18   still logged in
...
# ^D
[tom at releng-7-fbsd tom]$ last
tom              ttyp1    bofh             Sun Jul 22 16:18   still logged in


I'm going to do a little more digging and figure out if this is caused
by a behavior difference in sudo or FreeBSD.

tom

-- 
| tmclaugh at sdf.lonestar.org             tmclaugh at FreeBSD.org |
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