On Jul 13 10:27, Christopher Faylor wrote: > On Fri, Jul 13, 2007 at 04:15:26PM +0200, Corinna Vinschen wrote: > >On Jul 13 08:00, Eric Blake wrote: > >> According to Corinna Vinschen on 7/13/2007 7:06 AM: > >> >> Actually, this is a cygwin question. Bash's [ command only reports what > >> >> access("/h",W_OK) tells it to report, > >> > > >> > It's the latter. The fact that the USB stick is locked doesn't > >> > mean that the permission bits returned by the OS calls are augmented > >> > to reflect the fact that the stick is not writable. All permission > >> > bits are still intact. Only when actually trying to write to the device, > >> > you'll get the Win32 error message equivalent of EROFS. > >> > >> But POSIX requires access(...,W_OK) to fail with EROFS on a read-only file > >> system. Is there any way for cygwin to easily determine this without > >> actually attempting a write? > > > >Not that I'm aware of. I added this to my TODO list. However, as > >usual, http://cygwin.com/acronyms/#PTC. > > Why do I see another bullet item for the "Why is cygwin so slow" discussion > here?
Actually I found that there's a laughable simple way to determine a read-only device. When calling GetVolumeInformation, the FILE_READ_ONLY_VOLUME flag is set. I just tested this with a USB stick. Since we have the information from fs_info anyway, a fix should be very simple and not affect Cygwin's spee^Wslowness. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/