Re: [PATCH v3 3/4] string: Allow 2-argument strscpy_pad()

[Kees Cook <keescook@chromium.org>]

On Wed, Feb 07, 2024 at 12:51:51AM +0000, Justin Stitt wrote:
> Hi,
> 
> On Tue, Feb 06, 2024 at 06:22:18AM -0800, Kees Cook wrote:
> > Similar to strscpy(), update strscpy_pad()'s 3rd argument to be
> > optional when the destination is a compile-time known size array.
> 
> This patch is diff'd against Patch 1/4 in this series, right? I wonder
> why you split them up. If I hadn't literally just read that patch I
> would be mildly confused.
> 
> I suppose one reason may be that 1/4 is a standalone change with a high
> percentage chance of landing whilst this overloading magic may not land
> as easily?

I viewed it as a distinct logical change. I could certainly combine
them, but I think it's easier to review the conversion from function to
macro without needing to consider anything else. No behavioral changes
are expected, etc.

But if they were together, there's a little more cognitive load to keep
the func/macro conversion in mind while looking at the optional arg
magic, etc.

I don't think it's a strict rule or anything; it just felt like the
right thing to do to split them up.

> At any rate,
> Reviewed-by: Justin Stitt <justinstitt@google.com>

Thanks!

-Kees

-- 
Kees Cook