Re: [libgpiod] Request an output line, without modifying the value

[Kent Gibson <warthog618@xxxxxxxxx>]

On Fri, Apr 23, 2021 at 05:32:15PM +0200, Peter Rosin wrote:
> Hi!
> 
> I'm wondering if there is a way to request an output line using
> libgpiod without clobbering the previous value. I would like for
> an application to take a peek at this previous value of an output
> gpio and behave slightly different for 0/1.
> 
> Cheers,
> Peter

Assuming it is still an output then GPIOD_LINE_REQUEST_DIRECTION_AS_IS
should do what you are after.
But there is no guarantee that the line state is preserved across
requests, so YMMV.

Cheers,
Kent.