Re: bug#51857: cross-filesystem copying broken on macOS with coreutils >= 9.0

[Sudhip Nashi]

Awesome, thanks for the quick response! I’ll give this a go and let you know 
the results.

> On Nov 15, 2021, at 5:41 PM, Paul Eggert <eggert@cs.ucla.edu> wrote:
> 
> On 11/15/21 10:37, Sudhip Nashi wrote:
>> Turns out lseek is broken (or at least works differently) on macOS as well 
>> (https://lists.gnu.org/archive/html/bug-gnulib/2018-09/msg00054.html). Funny 
>> coincidence! I’ll take a better look later this week if I can and try to see 
>> what the exact problem is.
> 
> Thanks, I think I see the problem now.
> 
> Eventually macOS will likely get fixed to work around this lseek+SEEK_DATA 
> incompatibility (as FreeBSD, Solaris, etc. all do things the Linux way and 
> that's what I think will appear in the next POSIX), but in the meantime I 
> attempted to work around the portability issue by installing the attached 
> patch into Gnulib, and by syncing coreutils to the latest Gnulib.
> 
> I don't use macOS so have not tested this. Please give it a try, either by 
> building from bleeding-edge coreutils on Savannah, or by building from the 
> tarball temporarily here:
> 
> https://www.cs.ucla.edu/~eggert/coreutils-9.0.26-0f4d9.tar.gz
> 
> Thanks.<0001-lseek-port-around-macOS-SEEK_DATA-glitch.patch>