bug#61105: cp/mv: want a fatal --no-clobber

[Pádraig Brady]

On 31/01/2023 16:55, Paul Eggert wrote:
> On 2023-01-30 13:35, Pádraig Brady wrote:
> > This is a good observation.
> > Also the current "skip" functionality of coreutils cp -n
> > is already catered for with the --update option.
>
> For consistency, there too the exit status should reflect whether the cp
> action was done.
>
> I installed the attached patch to implement this; comments welcome. In
> the meantime I'm boldly closing the bug report.

I'm not sure I agree with making this change for --update.
Note POSIX doesn't specify -u (or -n TBH), so it's a
bit of a stretch to take its specification of
"All files were copied successfully" in this case,
when it wasn't considering these cases.

To me --update is less useful if it fails in this case.

thanks,
Pádraig