linux-kernel - Re: [PATCH 17/16] Do not reset UTF8 on terminal reset

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Message-ID: <20070402112607.GK26707@cel.leo>
Date:	Mon, 2 Apr 2007 12:26:07 +0100
From:	Paul LeoNerd Evans <leonerd@...nerd.org.uk>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
Cc:	"Antonino A. Daplas" <adaplas@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>,
	Paul LeoNerd Evans <leonerd@...nerd.org.uk>,
	Daniel Jacobowitz <dan@...ian.org>
Subject: Re: [PATCH 17/16] Do not reset UTF8 on terminal reset

On Mon, Apr 02, 2007 at 09:31:37AM +0200, Jan Engelhardt wrote:
> Also see:
> 	http://lkml.org/lkml/2005/5/17/289
> 	http://lkml.org/lkml/2005/5/17/297
> 
> These posts argue about terminfo being the culprit. But how can terminfo 
> be at fault, when `echo -en "\ec"` triggers it too?
> 
> Since I am in a patch mood, here's my stance/patch, which is compile and 
> run tested and behaves as expected (both with `echo` and `reset`).

...

> Index: linux-2.6.21-rc5/drivers/char/vt.c
> ===================================================================
> --- linux-2.6.21-rc5.orig/drivers/char/vt.c
> +++ linux-2.6.21-rc5/drivers/char/vt.c
> @@ -1518,7 +1518,6 @@ static void reset_terminal(struct vc_dat
>  	vc->vc_charset		= 0;
>  	vc->vc_need_wrap	= 0;
>  	vc->vc_report_mouse	= 0;
> -	vc->vc_utf		= 0;
>  	vc->vc_utf_count	= 0;
>  
>  	vc->vc_disp_ctrl	= 0;
> #<EOF>

Is it OK to do that? I recall when I was originally looking at the code
I didn't want to just remove that line, because it looked like that was
being used to first initialise the vc* structure when it is created, as
well as reset it every time. Doesn't this leave vc->vc_utf uninitialised
when a new VC is allocated?

-- 
Paul "LeoNerd" Evans

leonerd@...nerd.org.uk
ICQ# 4135350       |  Registered Linux# 179460
http://www.leonerd.org.uk/

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