[PATCH] touch: add config option to set microsecond timestamps

[Xabier Oneca -- xOneca]

Hi,

> On Thu Apr 8, 2021 at 9:24 AM BST, Rasmus Villemoes wrote:
> > Why not go all the way and start using utimensat() and do nanoseconds?
> > That's the resolution presented in struct stat, and what most file
> > systems store - without that, it's not possible to accurately replicate
> > one file's timestamps on another. Also, POSIX nowadays specifies touch
> > in terms of utimensat()
> > <https://pubs.opengroup.org/onlinepubs/9699919799/utilities/touch.html>.
> >
> > Rasmus
> Actually, it seems utimensat() is a function specified in SUSV4
> that would make FEATURE_TOUCH_SUS3 somewhat misleading
> Perhaps it should be renamed to FEATURE_TOUCH_SUSV4 if that is going to
> be the approach taken
>
> That would also make the code further down more messy, as you'd need
> more #if to cover a version using utimes(), and a version using
> utimenstat()
>
> What do you think?

Actually, I wold remove (l)utimes and use only utimenstat, without #ifdefs.

And about the SUSv3 options... I was thinking about renaming that
"group" of options to something like "fancy" (eg.
FEATURE_TOUCH_FANCY), like in other applets.

Thus things will be clearer. No?

Cheers,

Xabier Oneca_,,_