Re: [RFC] string: Allow 2-argument strscpy()

[Andy Shevchenko]

On Tue, Jan 30, 2024 at 1:27 AM Andy Shevchenko
<andy.shevchenko@xxxxxxxxx> wrote:
> On Tue, Jan 30, 2024 at 12:03 AM Kees Cook <keescook@xxxxxxxxxxxx> wrote:
> > On Mon, Jan 29, 2024 at 09:55:25PM +0000, Justin Stitt wrote:
> > > On Mon, Jan 29, 2024 at 12:29:04PM -0800, Kees Cook wrote:

..

> > > BTW, this hack for function overloading is insane. Never really looked into
> > > it before.
> >
> > It very much is. :P Hence the RFC nature of this patch. I don't think we
> > any any other API in the kernel that does this (though there are plenty
> > of wild macro wrappers to do similar tricks, like the syscall wrappers).
>
> PCI has a couple of such.
>
> > > I like this, though, should you include documentation changes/additions?
> >
> > Yeah, though I'm not sure how to do this -- kerndoc expects a fixed
> > number of arguments. :P Maybe I can just do something like add
> > "optional" to @size:
>
> Use ... See again PCI header (pci.h). One of the macros there has a
> valid kernel-doc.
>
> >  * strscpy - Copy a C-string into a sized buffer
> >  * @p: Where to copy the string to
> >  * @q: Where to copy the string from
> >  * @size: Size of destination buffer (optional)

FWIW,
https://elixir.bootlin.com/linux/latest/source/include/linux/pci.h#L1517


-- 
With Best Regards,
Andy Shevchenko