Date: Fri, 13 Jan 2012 12:59:11 GMT From: Claude Buisson <clbuisson@orange.fr> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/164082: recurring problem wirh /dev/console and syslog handling Message-ID: <201201131259.q0DCxBon040352@red.freebsd.org> Resent-Message-ID: <201201131300.q0DD0OiA073855@freefall.freebsd.org>
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>Number: 164082
>Category: kern
>Synopsis: recurring problem wirh /dev/console and syslog handling
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Jan 13 13:00:24 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Claude Buisson
>Release: 8.2-STABLE 9.0-CURRENT
>Organization:
>Environment:
FreeBSD 9.0-PRERELEASE #0: Sat Dec 3 16:59:34 CET 2011
toor@inspiron:/usr/obj/home/src/sys/INSPIRON9X i386
>Description:
This problem may be traced back to 8.0-CURRENT, and the first symptom was the
fact that xconsole and xterm -C stopped displaying console messages. This was
acknowledged by Ed Schouten in [1]
To work around this problem I patched src/sys/security/mac_stub/mac_stub.c, so
as to get stub_priv_grant() return 0 for PRIV_TTY_CONSOLE.
Others [2] [3] patched src/sys/kern/tty.c.
This worked BUT:
The kernel messages got displayed by xconsole or xterm -C, but not the messages
sent to /dev/console via syslog.
My current workaround is to use xterm -C running a
sudo watch /dev/ttyv0
the -C is needed for the kernel messages, and the watch for the syslog messages.
This worked with 8.X-STABLE, BUT:
After intalling a 9.0-CURRENT svn r224294 (I have not tested a previous
revision), I found that some kernel messages are displayed as blank/empty lines
in the xterm -C. See [4] for geli/geom_eli messages, such as
cryptosoft0: <software crypto> on motherboard
GEOM_ELI: Device ada0p9.eli created.
GEOM_ELI: Encryption: AES-XTS 128
GEOM_ELI: Integrity: HMAC/SHA256
GEOM_ELI: Crypto: software
This is also true for umass messages like:
da0: 40.000MB/s transfers
[1] http://lists.freebsd.org/pipermail/freebsd-hackers/2008-October/026518.html
[2] http://lists.freebsd.org/pipermail/freebsd-current/2011-January/022107.html
[3] http://lists.freebsd.org/pipermail/freebsd-current/2011-February/023109.html
[4] http://lists.freebsd.org/pipermail/freebsd-current/2011-August/026375.html
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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