bug#62404: --reflink=auto not falling back appropriately on older kernels

[Pádraig Brady]

On 23/03/2023 13:39, Pádraig Brady wrote:
> On 23/03/2023 13:03, Pádraig Brady wrote:
> > Details at
> > https://github.com/termux/termux-packages/issues/15706#issuecomment-1481144831
> >
> > But in summary, the new --reflink errno checking in coreutils 9.2
> > is not working appropriately on android 4.9 kernels at least.
>
> Proposed patch attached.
> It may be better to key on kernel version rather than __ANDROID__
> (along the lines of https://github.com/coreutils/coreutils/commit/ba5e6885d),
> but that needs more investigation.

Actually it seems the errno checking may be too brittle in general,
https://www.reddit.com/r/Proxmox/comments/11zieha/cpmvinstall_are_broken_in_unprivileged_containers/

Perhaps we should use the above __ANDROID__ logic in all cases,
so that we fallback unless there is a specific reason not to.

The attached does that.

cheers,
Pádraig

copy-clone-fallback.patch
Description: Text Data