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

From: Greg KH
Date: Sat Dec 28 2013 - 16:50:59 EST

On Sat, Dec 28, 2013 at 10:25:23PM +0100, Pavel Machek wrote:
> 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.

Ick, no. What are you trying to do here? Have the kernel intrepret a
sequence of bytes to flash an LED? I thought we have frameworks in
userspace already to handle this type of thing. Please don't invent new
ways of doing stuff...

greg k-h
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at