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Date: Fri, 18 Aug 2023 10:34:51 +0200
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: Martin Wege <martin.l.wege@gmail.com>
Cc: cygwin@cygwin.com
Subject: Re: mkfifo: cannot set permissions of 'x.fifo': Not a directory
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On Aug 18 06:02, Martin Wege via Cygwin wrote:
> On Mon, Aug 7, 2023 at 4:42 PM Martin Wege <martin.l.wege@gmail.com> wrote:
> >
> > Hello,
> >
> > We get a weird mkfifo failure in Cygwin on NTFS:
> >
> > /usr/bin/mkfifo -m 600 x.fifo
> > mkfifo: cannot set permissions of 'x.fifo': Not a directory
> >
> > Is there a known workaround? So far named fifos cannot be created somehow.
> 
> This is fixed for NTFS, but still broken for Windows builtin NFS v3 client:

It was actually never supposed to work on NFS.  Cygwin FIFOs are
created as symlinks of the type Windows shortcut with the R/O attribute
set.  Those are only generated on NTFS and FAT filesystems.  NFS symlinks
are generated using special magic.  NFS doesn't support DOS attributes.

Corinna