linux-kernel - Re: how to represent sequence of brightnesses in /sys (was Re: [PATCH] Add the LED burst trigger)

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Date:	Sat, 28 Dec 2013 22:25:23 +0100
From:	Pavel Machek <pavel@....cz>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Greg KH <greg@...ah.com>, Joe Xue <lgxue@...mail.com>,
	"cooloney@...il.com" <cooloney@...il.com>,
	"rpurdie@...ys.net" <rpurdie@...ys.net>,
	"rob@...dley.net" <rob@...dley.net>,
	"milo.kim@...com" <milo.kim@...com>,
	"linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>
Subject: Re: how to represent sequence of brightnesses in /sys (was Re:
 [PATCH] Add the LED burst trigger)

Hi!

> >> Sysfs is meant to be human-readable/writable, so please use plain ASCII
> >> numbers in strings instead.
> >
> > Actually, sysfs is meant to be one value per file, and it is
> 
> Ideally, yes.
> 
> > understood that data that are "natively blob" are just passed as
> > blob. (I believe this qualifies).
> 
> But it doesn't buy us much here, does it? It will make e.g. shell scripts
> needlessly complicated.

echo -ne '\012' is not that bad, and parsing array of integers from
kernel will be an ugly piece of code.

Anyway I don't care much, either byte array or ascii array of integers
is fine with me. (But I was under impression that after /proc
experiences, the latter is forbidden; I might be wrong.
/data/l/linux-good/Documentation/sysfs-rules.txt should be updated).

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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