On 2024-08-15 10:44, Michal Nazarewicz wrote:
> The*Warnings* buffer constantly popping up is annoying so I’d love this
> to be addressed though to be honest I’m not sure what would be a good
> solution.  Though I guess you can also argue this is CIFS bug.

It's definitely a file system bug. The symlink syscall should never 
create a regular file. I suggest reporting the bug to whoever maintains 
your file system code.

I don't see any good way to prevent Emacs from creating these 
zero-length files on buggy file systems.

That being said, I think Emacs can ignore and remove bad lock files 
without introducing more races. I installed the attached into the master 
branch and it works for me on your test case (which I introduced 
artificially on GNU/Linux). Please give it a try.

The first patches in this series are just setup. The last patch is the 
real workaround.