On Oct 20 15:57, Franz Sirl wrote: > Am 2011-10-20 15:09, schrieb Corinna Vinschen: > >On Oct 20 13:50, Franz Sirl wrote: > >>Am 2011-10-20 11:20, schrieb Corinna Vinschen: > >>>On Oct 19 18:43, Franz Sirl wrote: > >>>>True. But on the other hand NWFS and NcFsd exercise a lot of pathes > >>>>in the Cygwin sourcecode that aren't usually used. > >>> > >>>Not really a lot. NWFS is known to have three problems: > >>> > >>>- The NtQueryInformationFile(FileBasicInformation) call fails. This > >>> call is only used in circumstance which don't affect NWFS. > >> > >>I think that still fails with NcFsd, I'll check it. > > > >As I wrote, it's not used, so even if it fails, it's worth a > >support case with Novell, but it doesn't mean we have to change > >Cygwin. > > It fails with errorcode 0xc0000022, Access denied.
It might be worth a try to ask the Novell support why this occurs. This is a bug, IMHO. Since Vista, this call should even be supported in the Win32 API, using the call FILE_BASIC_INFO fbi; GetFileInformationByHandleEx (fhdl, FileBasicInfo, &fbi, sizeof fbi); > >>>- NWFS only supports filenames which follow DOS conventions. That is, > >>> it does not support filenames with leading spaces or trailing dots and > >>> spaces. This is only checked for when generating filenames. > >> > >>Leading and trailing spaces seem to work, trailing dots fail with > >>"Permission denied". > > > >So we still have to assume that only DOS filenames work. > > Hmm, I wonder if I should file at least a low priority enhancement > request for that. > > >>>- NWFS does not support re-opening a file by handle, so it always has to > >>> be re-opened by name. The only difference here is how the > >>> OBJECT_ATTRIBUTES is created, with a handle or with a name. > >> > >>I've worked with Novell to fix that one for NcFsd, will be in one of > >>the next releases (IR10 or IR11 I guess). > > > >Cool, but I think that NcFsd should still be subsumed under NWFS. > >The fact that re-opening doesn't quite work isn't such a big problem, > >and by using the OBJECT_ATTRIBUTES with a name we can support older > >versions of NcFsd as well. > > Older versions of NcFsd have even more problems with Cygwin, so > supporting them doesn't really make sense. It only works reasonable > since this years June release. I would prefer to keep this code path > exercised :-). Hmm, that should be possible. But keep in mind that this does not have a better performance on all filesystems. > >Are you ok if I send you an URL to a test DLL via PM for this issue? > >I would add the "handle NcFsd as NWFS" as well to this DLL, otherwise > >it would be identical to the latest snapshot, which should be available > >now, btw. > > Sure, PM me the URL. [...] Thanks, but not today anymore. 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
