Re: fstat st_size on open files on Parallels filesystem is wrong

[Corinna Vinschen <corinna-cygwin@cygwin.com>]

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On Nov  2 08:08, Jonathan Lennox wrote:
> On Monday, November 2 2015, "Corinna Vinschen" wrote to "cygwin@cygwin.com" saying:
> 
> > On Nov  2 04:38, Jonathan Lennox wrote:
> > > Unfortunately, when I do "Run As Administrator" on MinTTY, the Mac drives
> > > (/cygdrive/z and /cygdrive/y) don't show up. I don't know why that is.  So I
> > > can't test hard links as administrator.
> > 
> > That's a security feature of UAC.  You can change that in the registry.
> > As administrator:
> > 
> >   regtool -d set /HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Policies/System/EnableLinkedConnections 1
> > 
> > Then reboot.
> 
> Didn't work:
> 
> $ ls /cygdrive/
> c  d  e
> 
> $ regtool get /HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Policies/System/EnableLinkedConnections
> 
 ^^^?

That should print "1"

EnableLinkedConnections is a DWORD value and should be set to 1.

> $ uname -a
> CYGWIN_NT-10.0 Vidyo-LT0519-10 2.3.0(0.291/5/3) 2015-11-02 11:15 x86_64 Cygwin
> 
> Is Windows 10 the same?

Yes.  Works for me.

> > I added support for this filesystem (called prlfs in mount output) and
> > without hardlink support for now.  I uploaded a new developer snapshot
> > to https://cygwin.com/snapshots/ Please give it a try.
> 
> No, still seeing the failure in the snapshot:
> 
> $ ./stat-size-test.exe /cygdrive/y/foo ~/foo
> /cygdrive/y/foo: fstat: st_size=0
> /cygdrive/y/foo: stat: st_size=12
> /home/jonathan/foo: fstat: st_size=12
> /home/jonathan/foo: stat: st_size=12

Weird.  There should be no FileNetworkOpenInformation call anymore for
Netapp and the PrlSF filesystem.

Does Cygwin correctly recognize the FS?  What does `mount' print?  It
should print `type prlfs'.

Can you please once again call `/usr/lib/csih/getVolInfo.exe Z:' and
`/usr/lib/csih/getVolInfo.exe Y:' and paste the output here?  I'm not
quite sure because the original getVolInfo call returned a filesystem
type of "PrlSF", not "PrlFS" as I had expected.  Cygwin now checks for
"PrlSF".


Corinna

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

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