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Date:	Mon, 2 Nov 2015 15:06:27 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: fstat st_size on open files on Parallels filesystem is wrong
Message-ID:	<20151102140627.GA963@calimero.vinschen.de>
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On Nov  2 08:08, Jonathan Lennox wrote:
> On Monday, November 2 2015, "Corinna Vinschen" wrote to "cygwin AT cygwin DOT co=
m" saying:
>=20
> > On Nov  2 04:38, Jonathan Lennox wrote:
> > > Unfortunately, when I do "Run As Administrator" on MinTTY, the Mac dr=
ives
> > > (/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.
> >=20
> > That's a security feature of UAC.  You can change that in the registry.
> > As administrator:
> >=20
> >   regtool -d set /HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/Current=
Version/Policies/System/EnableLinkedConnections 1
> >=20
> > Then reboot.
>=20
> Didn't work:
>=20
> $ ls /cygdrive/
> c  d  e
>=20
> $ regtool get /HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersi=
on/Policies/System/EnableLinkedConnections
>=20
 ^^^?

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 C=
ygwin
>=20
> 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.
>=20
> No, still seeing the failure in the snapshot:
>=20
> $ ./stat-size-test.exe /cygdrive/y/foo ~/foo
> /cygdrive/y/foo: fstat: st_size=3D0
> /cygdrive/y/foo: stat: st_size=3D12
> /home/jonathan/foo: fstat: st_size=3D12
> /home/jonathan/foo: stat: st_size=3D12

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

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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