linux-kernel - Re: [QUERY] User-Mode Linux and /dev/tty*

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Date:	Tue, 16 Jul 2013 18:34:40 +0200
From:	Richard Weinberger <richard@....at>
To:	Ramkumar Ramachandra <artagnon@...il.com>
CC:	LKML <linux-kernel@...r.kernel.org>, Jeff Dike <jdike@...toit.com>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [QUERY] User-Mode Linux and /dev/tty*

Am 16.07.2013 18:26, schrieb Ramkumar Ramachandra:
> Richard Weinberger wrote:
>> UML does not have virtual consoles.
> 
> Then why do I see this on my UML box?
> 
> # ls /dev/tty* | wc -l
> 113
> 
> Why is it creating unusable devices?  Is drivers/tty.c responsible for
> this?  What is it exactly?

This is not UML specific.
Are you using devtmpfs?

>> I'm not running HEAD, but opensuse 12.3 (with systemd) works on UML.
> 
> Also, what's with all the
> 
>    xterm_open : run_helper failed, errno = 2

2 is ENOENT.
Do you have uml-utils installed?

> messages?  (I installed xterm, but it wasn't very enlightening)
> How is drivers/xterm.c supposed to work?  And what is mconsole?

the xterm drivers opens a xterm on the host side using port-helper.
Mconsole is the management console.
Please read the documentation.

Thanks,
//richard

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