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Subject:	Re: Cygwin: /usr/bin/mount with UNC path does not work
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On Thu, Jun 11, 2026 at 11:57 AM Aurélien Couderc
<aurelien DOT couderc2002 AT gmail DOT com> wrote:
>
> On Thu, Jun 11, 2026 at 12:57 AM Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp> wrote:
> >
> > On Wed, 10 Jun 2026 20:32:44 +0200
> > Aurélien Couderc wrote:
> > > On Wed, Jun 10, 2026 at 3:04 PM Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp> wrote:
> > > >
> > > > On Wed, 10 Jun 2026 14:46:42 +0200
> > > > Aurélien Couderc wrote:
> > > > > Cygwin:
> > > > >
> > > > > /usr/bin/mount with UNC path does not work on Cygwin 3.7 (todays version).
> > > > >
> > > > > Example:
> > > > > mkdir nfsdata
> > > > > /usr/bin/mount  '\\66 DOT 9 DOT 20 DOT 44 AT NFS@2049\nfspool' $PWD/nfspool
> > > > >
> > > > > But $PWD/nfspool is empty then, while ls -l
> > > > > //66 DOT 9 DOT 20 DOT 44 AT NFS@2049/nfspool shows directory content.
> > > > >
> > > > > What am I doing wrong?
> > > >
> > > > /usr/bin/mount //66 DOT 9 DOT 20 DOT 44 AT NFS@2049/nfspool
> > >
> > > No, that only prints:
> > > mount: can't find //66 DOT 9 DOT 20 DOT 44 AT NFS@2049/nfspool in /etc/fstab or in
> > > /etc/fstab.d/$USER
> >
> > Ah, sorry. I meant:
> >
> > > I also tried
> > > mkdir nfspool
> > > /usr/bin/mount  '//66 DOT 9 DOT 20 DOT 44 AT NFS@2049/nfspool' $PWD/nfspool
> >
> > of cource.
> >
> > > that succeeded, but a cd nfspool then fails.
>
> I think I found the issue;
> The /usr/bin/mount and cd works if $PWD is on NTFS, but fails if $PWD
> is on SMB or NFS.
>
> Is this a Cygwin bug?

Testcase:
After the cd nfspool do a cygwin -w "$PWD"
In my case this reports the path of the base filesystem and not the
UNC path passed to /usr/bin/mount.

Aurélien
-- 
Aurélien Couderc <aurelien DOT couderc2002 AT gmail DOT com>
Big Data/Data mining expert, chess enthusiast

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