rm -rf cannot delete the upmost directory level anymore on a Novell share

Corinna Vinschen corinna-cygwin@cygwin.com
Thu Oct 20 13:10:00 GMT 2011


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.

> >- 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.

> >- 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.

> $ mount
> F: on /cygdrive/f type ncfsd (binary,posix=0,user,noumount,auto)

Ok, so it's not subsumed under any other filesystem.  I'll change that
in CVS to handle NcFsd identical to NWFS.

> $ /usr/lib/csih/getVolInfo /cygdrive/j
> Device Type        : 7
> Characteristics    : 30
> Volume Name        : <VOL_DEVEL>
> Serial Number      : 1549160268
> Max Filenamelength : 255
> Filesystemname     : <NcFsd>
> Flags              : a2
>   FILE_CASE_SENSITIVE_SEARCH  : FALSE
>   FILE_CASE_PRESERVED_NAMES   : TRUE
>   FILE_UNICODE_ON_DISK        : FALSE
>   FILE_PERSISTENT_ACLS        : FALSE
>   FILE_FILE_COMPRESSION       : FALSE
>   FILE_VOLUME_QUOTAS          : TRUE
>   FILE_SUPPORTS_SPARSE_FILES  : FALSE
>   FILE_SUPPORTS_REPARSE_POINTS: TRUE
>   FILE_SUPPORTS_REMOTE_STORAGE: FALSE
>   FILE_VOLUME_IS_COMPRESSED   : FALSE
>   FILE_SUPPORTS_OBJECT_IDS    : FALSE
>   FILE_SUPPORTS_ENCRYPTION    : FALSE
>   FILE_NAMED_STREAMS          : FALSE
>   FILE_READ_ONLY_VOLUME       : FALSE
>   FILE_SEQUENTIAL_WRITE_ONCE  : FALSE
>   FILE_SUPPORTS_TRANSACTIONS  : FALSE

Thanks.

> The rest of your questions I will answer as soon as the new snapshot
> is available.

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.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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