atom feed46 messages in org.kernel.vger.linux-kernelRe: tty: add 'active' sysfs attribute...
FromSent OnAttachments
Kay SieversNov 16, 2010 7:46 am 
Alan CoxNov 16, 2010 7:56 am 
Kay SieversNov 16, 2010 8:12 am 
Alan CoxNov 16, 2010 9:14 am 
Kay SieversNov 16, 2010 10:51 am 
Alan CoxNov 16, 2010 11:55 am 
Kay SieversNov 16, 2010 12:15 pm 
Alan CoxNov 16, 2010 12:48 pm 
Kay SieversNov 16, 2010 1:28 pm 
Lennart PoetteringNov 16, 2010 1:35 pm 
Lennart PoetteringNov 16, 2010 1:42 pm 
Alan CoxNov 16, 2010 2:51 pm 
Alan CoxNov 16, 2010 2:55 pm 
Lennart PoetteringNov 16, 2010 2:58 pm 
Alan CoxNov 16, 2010 3:04 pm 
Lennart PoetteringNov 16, 2010 3:10 pm 
Lennart PoetteringNov 16, 2010 3:18 pm 
Alan CoxNov 16, 2010 3:45 pm 
Etched PixelsNov 16, 2010 3:49 pm 
John StoffelNov 17, 2010 8:31 am 
Vald...@vt.eduNov 17, 2010 2:00 pm 
Kay SieversNov 17, 2010 3:39 pm 
Alan CoxNov 17, 2010 3:56 pm 
Greg KHNov 17, 2010 5:27 pm 
Lennart PoetteringNov 17, 2010 5:48 pm 
Greg KHNov 17, 2010 5:52 pm 
Lennart PoetteringNov 17, 2010 6:28 pm 
Alan CoxNov 18, 2010 2:14 am 
Dr. Werner FinkNov 18, 2010 2:59 am 
Alan CoxNov 18, 2010 3:23 am 
Kay SieversNov 18, 2010 3:54 am 
Kay SieversNov 18, 2010 4:03 am 
Dr. Werner FinkNov 18, 2010 4:12 am 
Alan CoxNov 18, 2010 4:57 am 
Alan CoxNov 18, 2010 5:00 am 
Dr. Werner FinkNov 18, 2010 5:13 am 
Alan CoxNov 18, 2010 6:41 am 
Dr. Werner FinkNov 19, 2010 5:21 am 
Alan CoxNov 19, 2010 7:46 am 
Dr. Werner FinkNov 19, 2010 9:06 am.tiocgdev
Greg KHNov 19, 2010 10:02 am 
Dr. Werner FinkNov 19, 2010 10:41 am 
Alan CoxNov 20, 2010 4:39 am 
Dr. Werner FinkDec 1, 2010 3:15 am 
Dr. Werner FinkDec 1, 2010 4:31 am.tiocgdev
Dr. Werner FinkDec 3, 2010 3:47 am.Other
Subject:Re: tty: add 'active' sysfs attribute to tty0 and console device
From:Dr. Werner Fink (wer@suse.de)
Date:Nov 18, 2010 5:13:42 am
List:org.kernel.vger.linux-kernel

On Thu, Nov 18, 2010 at 12:58:22PM +0000, Alan Cox wrote:

Example: running a boot script on /dev/console and after fsck sulogin has to called to be able to asked the system admin. Now the question is which console device the system admin is waiting in front of (before /dev/ttyS0 or /dev/tty3270 or whatever).

Ok that is a rather nebulous concept for embedded. The answer probably being that the true console device has no input facility.

I'm aware of. For using tty devices of the system console it requires to have e.g. with my patch:

bash> cat /proc/tty/consoles tty0 -WU (ECp) 4:7

the `W' flag for write and the major:minor pair, beside this the `U' flag indicates the tty can do an unblank operation, the `-' shows that there is no read operation (never seen such a console tty). On an other

Try the lp printer console if you want a test case

to detect the primary console device here.

Why not just open /dev/console ?

How can I detect the major and minor of the primary console device of /dev/console without controlling tty? Even if my old blogd and the bootlogd(8) of SysInitV using TIOCCONS are outdated by SystemD the question before doing the TIOCCONS is which is the primary console device to e.g. create the device node in initrd or for bootlogd(8) to write a copy of the console messages back to the original primary console (and the other console devices).

Werner

-- "Having a smoking section in a restaurant is like having a peeing section in a swimming pool." -- Edward Burr

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