Re: [kbd] [PATCH] src/libkeymap: add support for parsing more unicode values

[Anisse Astier <anisse@astier.eu>]

On Mon, Mar 01, 2021 at 03:09:39PM +0100, Alexey Gladkov wrote:
> On Sat, Feb 27, 2021 at 03:36:11PM +0100, Anisse Astier wrote:
> > The auto-generated (with ckbcomp) file fr-bepo_afnor did not load (even
> > partially), because of an U+1f12f (copyleft symbol) that is wrongly
> > parsed, generating this error message:
> > 
> > 	too many (160) entries on one line
> > 
> > Fix libkeymap so that the keymap can be parsed, even if the offending
> > character won't be loaded because of the ushort limitation of the
> > kb_value KDSKBENT uapi.
> > 
> > It's better to have the keymap partially loaded than not at all.
> 
> Nop. Partially keymap loading is very dangerous. You can get a completely
> unusable console. The libkeymap shouldn't break the console if it is known

By partially, I meant that only a single character of a single key
wouldn't load. I'm curious, what would be the implications here ? How
could it break ?

I tried loading this keymap, and didn't see any averse effect. The
character was missing, and that's about it. Why wouldn't we want that ?

> in advance that the keymap is not correct. You should fix ckbcomp so that
> it generates the correct keymap.
> 

I thought about doing this too, but it would mean not recognizing a
valid (albeit unsupported) unicode symbol. At least here the parsing
works, even if this particular symbol isn't loaded because of kernel
console limitations.

It feels weird to use the U+ unicode symbol notation, and then refuse to
load 2/3rd of those.

Regards,

Anisse