Re: [PATCH v3 3/4] vsscanf(): do not skip spaces

[Rasmus Villemoes]

On 10/06/2023 22.40, Demi Marie Obenour wrote:
> Passing spaces before e.g. an integer is usually
> not intended. 

Maybe, maybe not. But it's mandated by POSIX/C99.

And of course we are free to ignore that and implement our own semantics
(though within the constraints that we really want -Wformat to help us),
but there seems to be existing code in-tree that relies on this
behavior. For example I think this will break
fsl_sata_intr_coalescing_store() which uses a scanf format of "%u%u".

Sure, that could just say "%u %u" instead, but the point is that
currently it doesn't. So without some reasonably thorough analysis
across the tree, and updates of affected callers, NAK.

Rasmus