On 2023-09-01 08:09, Bruno Haible wrote:
> It applies to all 4 variants, as can be seen from applying it to a directory:
> 
> $ ./a.out /media/nas/bruno/dir1
> lchown: Permission denied
> fchownat: Permission denied
> chown: Permission denied
> fchown: Permission denied

Thanks, for coreutils it'd be helpful to now whether there's a similar 
problem with chmod-related syscalls. If you compile and run the attached 
program on a file that you don't own (e.g., './a.out /'), does it 
incorrectly issue "Permission denied" instead of "Operation not 
permitted" diagnostics?