On Nov 16 10:33, aputerguy wrote: > > Corinna Vinschen writes: > > In that case, the problem probably occurs because userB has no > > permissions to read the file permissions. Cygwin's chmod creates a > > POSIX compatible ACL, which adds READ_CONTROL permissions for everyone. > > That seems to be the case here and would seem to explain it - thanks! > BTW, it seems that chmod also adds FILE_READ_ATTRIBUTES though READ_CONTROL > is all that was needed to solve my problem. > > Also, for the record, it seems that 'cp -a' does similar except it also > *deletes* the SYSTEM ACL attributes of DELETE, WRITE_DAC and WRITE_OWNER. > It's not intuitively obvious to me why 'cp -a' would degrade permissions... > > That being said is there (or should there) be a flag to 'cp' that will > strictly preserve 'all' ACL attributes in a similar way to how Linux has the > -Z flag to preserve SELinux context?
It's not cp but the Cygwin DLL which looks for the permissions. The permission bits are strictly viewed from a POSIX point of view and all rwx bits are translated to a specific set of ACE permission bits and vice versa. If you need control over every single permission bit in a Windows ACL, use a Windows tool. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
