freebsd stable - Aug 2004 - mesg Broke on Stable between 8/21 and 8/28

When I replaced a STABLE build from 8/21 with one from 8/29, "mesg" 
stopped working on xterms.

I treat each xterm as a login shell, and include "mesg n" in .login.  
The problem seems to be that ownership of /dev/ttyp? is not being 
transferred to the user anymore.  I remember that "options UCONSOLE" 
was involved in the transfer of ownership.  That configuration element 
was in both the 8/21 and 8/28 kernels; nothing was changed in the 
config file.

I checked the mailing list archives, and there does seem to be some 
recent action in the tty driver area.  Unfortunatly, we were 
compromised recently, and I'm only now getting my connections to e-mail 
lists (including this one) re-established, so my knowledge of recent 
list traffic is limited to what I can find on the web site.

Does anyone have any idea what has caused the change?
-- 
M/S 258-5                |1024-bit PGP fingerprint:|tweten@nas.nasa.gov
NASA Ames Research Center| 41 B0 89 0A  8F 94 6C 59|     (650) 604-4416
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Not an official NASA position; you can't even be certain who sent this!

On Sun, 29 Aug 2004 18:56:48 -0700
Dave Tweten <tweten@nas.nasa.gov> wrote:
> When I replaced a STABLE build from 8/21 with one from 8/29,
"mesg"
> stopped working on xterms.
> 
> I treat each xterm as a login shell, and include "mesg n" in
.login.
> The problem seems to be that ownership of /dev/ttyp? is not being 
> transferred to the user anymore.  I remember that "options
UCONSOLE"
> was involved in the transfer of ownership.  That configuration element 
> was in both the 8/21 and 8/28 kernels; nothing was changed in the 
> config file.
> 
> I checked the mailing list archives, and there does seem to be some 
> recent action in the tty driver area.  Unfortunatly, we were 
> compromised recently, and I'm only now getting my connections to e-mail
> lists (including this one) re-established, so my knowledge of recent 
> list traffic is limited to what I can find on the web site.
> 
> Does anyone have any idea what has caused the change?
> -- 
> M/S 258-5                |1024-bit PGP fingerprint:|tweten@nas.nasa.gov
> NASA Ames Research Center| 41 B0 89 0A  8F 94 6C 59|     (650) 604-4416
> Moffett Field, CA  94035 | 7C 80 10 20  25 C7 2F E6|FAX: (650) 604-4377
> Not an official NASA position; you can't even be certain who sent this!
> 
> 
> _______________________________________________
> freebsd-stable@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to
"freebsd-stable-unsubscribe@freebsd.org"
> 
Similar here. On 4.9-STABLE (I'm awaiting ipfilter straightened out).

The symptoms are:

o 'mesg n' in .cshrc doesn't cause problem when remotely logged in,

o starting up with xterm or running script are 'permission denied',

o vi command 'set nomesg' is 'Operation not permitted'.


The stem of those problems of mine is recent dropping of setuid bit
from /usr/X11R6/bin/xterm.

I tried setting setuid bit on /usr/bin/mesg. It solved the first problem
but not the second. So, due to the fear of further unforeseen troubles
(although 'set nomesg' itself doesn't look make much sense),
I have set setuid back on xterm. Now, it is (they are):

% ls -aFl /usr/X11R6/bin/xterm*
lrwxrwxrwx  1 root  wheel      27 Aug 30 11:26 /usr/X11R6/bin/xterm@ ->
/usr/X11R6/bin/xterm-static
-rwsr-xr-x  1 root  wheel  260792 Aug 29 06:23 /usr/X11R6/bin/xterm-static*
%


horio shoichi