Date: Wed, 10 Sep 2008 22:54:26 -0300 From: "Carlos A. M. dos Santos" <unixmania@gmail.com> To: "Jeff Blank" <jb000002@mr-happy.com> Cc: freebsd-stable@freebsd.org Subject: Re: can't see non-root writes to /dev/console Message-ID: <e71790db0809101854k1b9d75dck2efb3fee8ee67826@mail.gmail.com> In-Reply-To: <20080910203445.GA8561@mr-happy.com> References: <20080910203445.GA8561@mr-happy.com>
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On Wed, Sep 10, 2008 at 5:34 PM, Jeff Blank <jb000002@mr-happy.com> wrote:
> I just upgraded a RELENG_7 (amd64) box from 20080714 to "latest"
> (which seems to be from a few days ago--no changes from Monday
> morning's csup to today's) and can no longer see the effect of writing
> to /dev/console as non-root. When I log in using xdm, my user owns
> /dev/console, mode 0622 (-rw--w--w-), and I start an 'xterm -C'. But
> when I, for example,
>
> echo foo > /dev/console
>
> I see nothing in the console xterm. No error messages, and echo exits
> 0. If I su to root and do the same, I get 'foo' in the same console
> xterm. Syslog messages to /dev/console also appear, of course. All
> the above applies to xconsole as well, not just xterm. I did
> recompile xterm from 20080616 ports, but it didn't fix the issue
> (didn't expect it to, as xterm clearly has no trouble attaching and
> reading). So my echo is getting lost in the kernel, I guess.
>
> Known problem? Intentional change? Something else?
I have seen this problem since 6.x times and still on 7.x. I also
noticed that if I send something to the console after xconsole starts
then I can sned messages as an ordinary user. My workaround was
modifying the Xsetup_0 script (I used xdm for login), adding a line
with
(sleep 3; date >> "$dev_console") &
just after starting xconsole.
I didn't have time to set up a machine with 8-CURRENT yet, so I could
not check if the new mp-safe tty implementation fixes this, either
intentionally or by a fortunate side effect.
--
cd /usr/ports/sysutils/life
make clean
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