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Date:	Thu, 5 Dec 2019 20:16:48 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: 3.0.7(0.338/5/3): Possible reference to Developer's instances of dev files in deployed build
Message-ID:	<20191205191648.GC5146@calimero.vinschen.de>
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On Dec  5 16:10, Ken Brown wrote:
> On 12/5/2019 7:52 AM, Corinna Vinschen wrote:
> > On Dec  5 10:18, Corinna Vinschen wrote:
> >> On Dec  4 21:41, Ken Brown wrote:
> >>> The difference is that NtCreateFile doesn't fail with
> >>> STATUS_OBJECT_NAME_NOT_FOUND in the other cases, so the code containi=
ng the
> >>> assertion doesn't get run.
> >>>
> >>> BTW, I just tried the following on my system:
> >>>
> >>> $ ls z:\\
> >>> ls: cannot access 'z:\': No such file or directory
> >>>
> >>> strace shows that NtCreateFile fails with STATUS_OBJECT_PATH_NOT_FOUN=
D in this
> >>> case, so again the code containing the assertion is not run.
> >>>
> >>> To be continued...
> >>
> >> So, maybe we could just check if ext_here - path > 2, i. e.
> >>
> >>      if (status =3D=3D STATUS_OBJECT_NAME_NOT_FOUND && ext_here - path=
 > 2)
> >>
> >> That excludes "X:" paths from this special handling for DOS-only drive=
s.
> >=20
> > The only problem here is that I can't reproduce the assertion failure.
> >=20
> > I created a Samba share on a Linux machine, mounted it as drive Z:,
> > and set the "always available offline" property of the drive.
> >=20
> > After syncing I accessed the drive, then I stopped Samba on the Linux
> > server to switch the drive into offline mode.  Then I ran `ls -la
> > /cygdrive/z'.  After a few secs I got the offline content cached on the
> > local machine.  I also tried `ls -la /cygdrive/' and `cd /cygdrive; ls
> > -la', but every time I got the expected output.  In the cases I tried
> > to list /cygdrive itself I got the expected output, all drives except
> > the z drive.
> >=20
> > I tried this with Cygwin 3.1.0-0.8.x86_64 on Windows 7 and Windows 10.
> >=20
> > So either there's something very special in Wilfed's setup, or I'm
> > doing something wrong.  Which is it?
>=20
> How does your strace output compare to Wilfed's when you list /cygdrive? =
 Does=20
> it show a failed attempt to list Z: with an error from NtCreateFile?

Not at all.  The strace doesn't show any attempt to open Z:.


Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

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