[Samba] IPC connections and utmp

Andrew Bartlett abartlet at samba.org
Fri Oct 10 02:43:19 GMT 2003

On Thu, 2003-10-09 at 12:02, drgn65 at ufl.edu wrote:
> Hi,
> I am running Samba version 2.2.5 with utmp turned on.  I have a problem with
> utmp and not displaying who is currently logged in.  The basic idea is that
> even though a user has logged off the computer (win2k pro) a connection to
> IPC$ remains.  It gives this.
> [root at lifesaver root]# smbstatus -u scott
> Samba version 2.2.5
> Service      uid      gid      pid     machine
> ----------------------------------------------
> IPC$         scott    ops      19247   tech3    ( Mon Oct  6
> 07:19:46 2003
> IPC$         scott    ops      19247   tech3    ( Wed Oct  8
> 08:09:49 2003
> Scott is obviously logged off.  But since the connection is still there, it
> remains in utmp for a LONG time or until someone shuts the computer down (or
> restart).
> [root at lifesaver root]# w
>   9:51pm  up 20 days, 15:12,  3 users,  load average: 0.08, 0.09, 0.09
> USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU  WHAT
> scott    smb/1     7:14am  0.00s  1:56m  0.02s  smbd -D
> scott    smb/2    Mon 6am  0.00s  1:56m  0.02s  smbd -D
> Thats what ends up in my utmp.  So, I very rarely have an accurate picture
> of who is on the network without doing smbstatus -u user on basically
> everyone. :(
> I understand the IPC connection probably needs to stay open.  (I don't fully
> know why).  Is this problem fixed in later versions of samba?  I am running
> a moderately old version.

No - as the user is still logged in - there is no way we can tell that
they won't open up a file-share again.   Yes, it's a real pain, but
unless you can convince the client to really log off, there isn't much
we can do...

> Oh yea, 1 other thing.  kill -9 pid of a "ghosted IPC connection" is
> incredibly bad.  The entry seems to want to stay in utmp until reboot.  :(

Standard utmp behaviour  - if you kill -9 your login process, the same
will happen.

> Any help?  Is it like this in all versions of samba, including 3.0?
> Thanks for the help!
> Peter Shull
Andrew Bartlett                                 abartlet at pcug.org.au
Manager, Authentication Subsystems, Samba Team  abartlet at samba.org
Student Network Administrator, Hawker College   abartlet at hawkerc.net
http://samba.org     http://build.samba.org     http://hawkerc.net
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