Re: [webmin-l] Users and Groups hangs when /etc/skel/Desktop with some softlinks are present

[Jamie C. <jca...@we...>]

On 20/Apr/2012 23:04 Berni Elbourn <ber...@gm...> wrote ..
> On 20/04/12 21:01, Jamie Cameron wrote:
> > On 20/Apr/2012 12:45 Berni Elbourn<ber...@gm...>  wrote ..
> >> On 20/04/12 20:30, Berni Elbourn wrote:
> >>> On 20/04/12 19:18, Jamie Cameron wrote:
> >>>> On 20/Apr/2012 05:06 Berni Elbourn<ber...@gm...>  wrote ..
> >>>>> Hi
> >>>>>
> >>>>> miniserv.pl seems to loop forever when a folder called Desktop with some
> >>>>> links are present in the /etc/skel
> >>>>>
> >>>>> Note: the normal useradd -m does not hang
> >>>>>
> >>>>> Versions: Webmin 1.580 on Debian Squeeze amd64
> >>>>
> >>>> Is this when creating a user, or just when opening the list of users?
> >>>>
> >>>> - Jamie
> >>>
> >>> Sorry for the brevity .. I found and reported the problem at a customer
> >>> site.
> >>>
> >>> It is the create new user operation ... after letting the process run
> >>> for a few minutes I restarted webmin. The passwd files and /home
> >>> directory are created but .lock files are left behind. Some of the
> >>> /etc/skel files are in the home directory but are owned by root.
> >>>
> >>> I have just tried the operation on another system...same result.
> >>> Aborting after a few minutes. The Desktop folder is present in the new
> >>> user but it is still owned by root...
> >>>
> >>> sudo ls -l /home/test99/
> >>>
> >>> lrwxrwxrwx 1 test99 users 11 Apr 20 20:27 data4 ->  /data/data4
> >>> drwxr-xr-x 2 root root 4096 Apr 20 20:19 Desktop
> >>>
> >>> ...maybe it is something to do with setting the ownership?
> >>>
> >>> Berni
> >>>
> >>
> >> Just to add the full contents of /etc/skel is:
> >>
> >> elbournb@hp6715:/etc/skel$ sudo ls -laR /etc/skel
> >> /etc/skel:
> >> total 40
> >> drwxr-xr-x   3 root root  4096 Apr 20 20:26 .
> >> drwxr-xr-x 226 root root 20480 Apr 20 20:39 ..
> >> -rw-r--r--   1 root root   220 Dec 11  2006 .bash_logout
> >> -rw-r--r--   1 root root  3184 Apr 10  2010 .bashrc
> >> lrwxrwxrwx   1 root root    11 Apr 20 20:26 data4 ->  /data/data4
> >> drwxr-xr-x   2 root root  4096 Apr 20 20:19 Desktop
> >> lrwxrwxrwx   1 root root    12 Sep 14  2008 .gnomerc ->  /etc/gnomerc
> >> -rw-r--r--   1 root root   675 May 12  2008 .profile
> >>
> >> /etc/skel/Desktop:
> >> total 8
> >> drwxr-xr-x 2 root root 4096 Apr 20 20:19 .
> >> drwxr-xr-x 3 root root 4096 Apr 20 20:26 ..
> >> lrwxrwxrwx 1 root root   11 Apr 20 20:19 data4 ->  /data/data4
> >>
> >> After a few minutes of running the new user process...a new user looks
> >> like this. Webmin seemingly never completes the process.
> >>
> >> elbournb@hp6715:/etc/skel$ sudo ls -laR /home/test99
> >> /home/test99:
> >> total 16
> >> drwx------.  3 test99 users 4096 Apr 20 20:40 .
> >> drwxr-xr-x  18 root   root  4096 Apr 20 20:40 ..
> >> lrwxrwxrwx   1 test99 users   11 Apr 20 20:40 data4 ->  /data/data4
> >> drwxr-xr-x   2 root   root  4096 Apr 20 20:19 Desktop
> >> lrwxrwxrwx   1 test99 users   12 Apr 20 20:40 .gnomerc ->  /etc/gnomerc
> >>
> >> /home/test99/Desktop:
> >> total 12
> >> drwxr-xr-x  2 root   root  4096 Apr 20 20:19 .
> >> drwx------. 3 test99 users 4096 Apr 20 20:40 ..
> >> lrwxrwxrwx  1 root   root    11 Apr 20 20:19 data4 ->  /data/data4
> >>
> >> After a few minutes Webmins is still stuck showing the create new user
> >> form with "waiting for localhost"...process is not using much cpu...
> >>
> >> 3373 root      20   0  105m  43m 2364 D    8  2.3   0:10.01 miniserv.pl
> >
> > If you run :
> >
> > strace -p 3373
> >
> > to see what that process is doing, what does it output?
> >
> >   - Jamie
> >
> > ------------------------------------------------------------------------------
> 
> Sorry I forgot to mention that the directories at the end of these 
> softlinks are actually mountpoints for data servers. On this system they 
> are nfs on the customer machine they are cifs.

Interesting .. I wonder if perhaps the fileservers those links point
to are slow or down, causing the copy to hang?

> elbournb@hp6715:~$ mount | grep /data/data4
> red:/data/data4 on /data/data4 type nfs (rw,addr=192.168.2.10)
> 
> Fortunately the strace does not produce too much over a few minutes:-

That looks like the wrong process..

Actually, I just realized what you should look for is a "cp" command
that Webmin runs to copy the files in /etc/skel. See if you can find one
of those running with "ps auxwwwww |  grep cp" , and let me know its
full commandline.

Also, running strace on the PID of that process would be useful.

 - Jamie