linux-kernel - Re: [PATCH] kbd: (#7063) make CapsLock work as expected even for non-ASCII

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20091117115503.GB1657@x200>
Date:	Tue, 17 Nov 2009 14:55:03 +0300
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Samuel Thibault <samuel.thibault@...-lyon.org>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	hpa@...or.com, alan@...rguk.ukuu.org.uk, mgarski@...t.pl
Subject: Re: [PATCH] kbd: (#7063) make CapsLock work as expected even for
 non-ASCII

On Tue, Nov 17, 2009 at 12:15:20AM +0100, Samuel Thibault wrote:
> Alexey Dobriyan, le Tue 17 Nov 2009 02:05:23 +0300, a écrit :
> > On Mon, Nov 16, 2009 at 11:54:29PM +0100, Samuel Thibault wrote:
> > > Samuel Thibault, le Mon 16 Nov 2009 23:27:38 +0100, a écrit :
> > > > > My keymap contains
> > > > > 
> > > > > 				keycode 44 = +z
> > > > > 		shift           keycode 44 = +Z
> > > > > 	altgr                   keycode 44 = U+044F        # CYRILLIC SMALL LETTER YA
> > > > > 	altgr   shift           keycode 44 = U+042F        # CYRILLIC CAPITAL LETTER YA
> > > > 
> > > > And U+044F / U+042F is not KT_LETTER.
> > > > 
> > > > Yes, there's no way you can express a unicode character in KT_LETTER.
> > > > Limited interface, but that's not a reason to break other interfaces.
> > > 
> > > One way to go would be to decrete that keysyms between 0xD800 and 0xE000
> > 
> > And this is going to help me with U+042F/U+044F how?

> --- a/drivers/char/keyboard.c
> +++ b/drivers/char/keyboard.c
> @@ -1258,6 +1258,15 @@ static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
>  	type = KTYP(keysym);
>  
>  	if (type < 0xf0) {
> +		if (keysym >= 0xD800 && keysym < 0xE000) {

keysym is 0x044F at this point.

> +			/* Surrogates in Unicode, here KT_LETTER variants of unicode U+0000-U+07FF */
> +			keysym -= 0xD800;
> +			if (vc_kbd_led(kbd, VC_CAPSLOCK)) {
> +				key_map = key_maps[shift_final ^ (1 << KG_SHIFT)];
> +				if (key_map)
> +					keysym = key_map[keycode];
> +			}
> +		}
>  		param.value = keysym;
>  		if (atomic_notifier_call_chain(&keyboard_notifier_list, KBD_UNICODE, &param) == NOTIFY_STOP)
>  			return;
> 
> Which BTW is correct while the proposed patch earlier wasn't: the
> param.value needs to be the final keysym.

OK, this I should fix.

> But again, that only solves the problem of the limited range
> U+0000-U+0800 and doesn't solve the é/É french keyboard problem.
> 
> Adding an interface to change the modifier lock / LED assignation would
> on the other hand permit kbd and console-setup to properly do proper
> capslock processing correctly.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/