X-Recipient: archive-cygwin AT delorie DOT com
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D05213858298
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1691572377;
	bh=Lu8PPWABGhrdHmYx9/APW5tvTlPNKbWg11/4KRx42Z4=;
	h=References:In-Reply-To:Date:Subject:To:List-Id:List-Unsubscribe:
	 List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	 From;
	b=RqKfHerDv+rD65SBbUJ5MqfGXAXEuxTCWLKcmlMVu53A6nr71QqpxQ/Z3cogejXky
	 hyEWHdmdaEhLSxvTOfal42SyOqvkm4k4EKdRymX6itpqpvA/9B/sEoMdvAWFhq5jfo
	 /r/JnCtFHmLO5LWpwez7ZwXfhjvMXenVC7F/QJgo=
X-Original-To: cygwin AT cygwin DOT com
Delivered-To: cygwin AT cygwin DOT com
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 2110D3858D20
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20221208; t=1691572355; x=1692177155;
 h=content-transfer-encoding:to:subject:message-id:date:from
 :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc
 :subject:date:message-id:reply-to;
 bh=QfbooHN3jWx8damDseXFQ7VD5kmg18CdZ2nYwTkX1JQ=;
 b=CsCDH4VFUgvoz305dzebcb6J8MRvfZZZ6Gh0tKOXbvryALVSwFBAPklW38xG34L8/9
 alsfGc8edSu0vpccVfGn+cuQGErafjeF1iqc+2XeaHZKIKOBxkFfrfAFPlvpU6gnx28H
 9BTMgFqd2OD2qfXPe1YwRU5DM90/l2MBYy5v1119imG02ZNMSnqdN3HBa+DCUkzfIE/y
 ldduvl0Ld4Rzhv2ncIPMBDXUbIZuuN4o5kdMtJB6HxSGp8bUUMcWIsdE0nvwtK0H6M0e
 HnuMasyEO/Kgz91O8hXiKUf8YbrkgqVNtdIzunq5PlF1tOASIIP8+zv7nxauJ5HfTQ8f
 5euw==
X-Gm-Message-State: AOJu0YzXBbUcfAIULIzJ16qT5slx6f7pjrBnrY4cgx1sd4jZVE9vhlYh
 jYGwOm1ysSTj4BOyJt7dMxWDpTUG7YmGtJ5kXmcCH6fNgiY=
X-Google-Smtp-Source: AGHT+IHKcxsagxZpEsA8v4UU/mcXaqKz0crT9yccg3LYg6zJPNd1O3xLGyUy7dZ3jHX1ticdkoF5BmuZpTXr31YZUws=
X-Received: by 2002:a05:6808:10cb:b0:3a7:96e5:6a58 with SMTP id
 s11-20020a05680810cb00b003a796e56a58mr2413943ois.18.1691572355058; Wed, 09
 Aug 2023 02:12:35 -0700 (PDT)
MIME-Version: 1.0
References: <CANH4o6O-8O-iMaHowDuy0y7H=pVfZ-3EvubDmTdjGVSST8FkAQ AT mail DOT gmail DOT com>
 <c8daacfa-b441-ebbb-90da-03318080479c AT Shaw DOT ca>
 <ZNFCjtiVOhpRYhHI AT calimero DOT vinschen DOT de>
 <CANH4o6P2fBmxvOZKVrrxDuMByHEMgs2qg14p710aUuLsFYG4rA AT mail DOT gmail DOT com>
 <ZNH62q/fs9Lt78dD AT calimero DOT vinschen DOT de>
 <CANH4o6Pjfsgijcf3rHEeB+YsVQTQYm8EvepwFVdj_PrKuP4NHA AT mail DOT gmail DOT com>
 <ZNNH0hbsCqH98ioK AT calimero DOT vinschen DOT de>
In-Reply-To: <ZNNH0hbsCqH98ioK@calimero.vinschen.de>
Date: Wed, 9 Aug 2023 11:12:24 +0200
Message-ID: <CANH4o6M-PGuzDRMy_dzgnwfGmVhcH_VSw-w91AWggctOa9TLWw@mail.gmail.com>
Subject: Re: mkfifo: cannot set permissions of 'x.fifo': Not a directory
To: cygwin AT cygwin DOT com
X-Spam-Status: No, score=-0.2 required=5.0 tests=BAYES_00, DKIM_SIGNED,
 DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,
 SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
 server2.sourceware.org
X-BeenThere: cygwin AT cygwin DOT com
X-Mailman-Version: 2.1.29
List-Id: General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Archive: <https://cygwin.com/pipermail/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe: <https://cygwin.com/mailman/listinfo/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From: Martin Wege via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Martin Wege <martin DOT l DOT wege AT gmail DOT com>
Content-Type: text/plain; charset="utf-8"
Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>
Content-Transfer-Encoding: 8bit
X-MIME-Autoconverted: from base64 to 8bit by delorie.com id 3799CxUk001679

On Wed, Aug 9, 2023 at 10:01 AM Corinna Vinschen
<corinna-cygwin AT cygwin DOT com> wrote:
>
> On Aug  8 21:38, Martin Wege via Cygwin wrote:
> > On Tue, Aug 8, 2023 at 10:20 AM Corinna Vinschen
> > <corinna-cygwin AT cygwin DOT com> wrote:
> > >
> > > On Aug  7 23:14, Martin Wege via Cygwin wrote:
> > > > On Mon, Aug 7, 2023 at 9:14 PM Corinna Vinschen
> > > > <corinna-cygwin AT cygwin DOT com> wrote:
> > > > >
> > > > > On Aug  7 12:26, Brian Inglis via Cygwin wrote:
> > > > > > On 2023-08-07 08:42, Martin Wege via Cygwin wrote:
> > > > > > > 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
> > > > > >
> > > > > > This error is also reproducible with default fifo permissions 666 or
> > > > > > anything else, and appears to be returned by gen_full_path_at() in
> > > > > > syscalls.cc when called with a fifo:
> > > > >
> > > > > This will be fixed in 3.4.8,
> > > >
> > > > Thank you
> > > >
> > > > > see
> > > > > https://cygwin.com/git/?p=newlib-cygwin.git;a=commit;h=b56b4d7fd85b
> > > >
> > > > First, Can I download a beta of  3.4.8, or any other version with that
> > > > fix? It's pretty urgent
> > >
> > > You can install a test release of Cygwin, simply by using the setup tool
> > > These test releases are always created from the git main branch, though,
> > > so they are always test releases of the next major version, currently
> > > 3.5.0.
> >
> > Where can I download the Setup.exe tool for those test releases?
>
> You already have it: https://cygwin.com/install.html

Thanks

>
> > > > Secondly, how are fifos, other device nodes and mknod implemented? You
> > > > encode them as softlinks on ntfs?
> > >
> > > Not only on NTFS.  FIFOs on the disk are always created as symlinks
> > > with a special target string, recognized by Cygwin.  No differece on
> > > NFS.  Microsoft NFSv3 has no way to specify creating a "real" FIFO
> > > on the remote filesystem.  It wouldn't make sense anyway, because
> > > there's no way to share the FIFO across systems.
> >
> > So no Windows ioctl to do a mknod?
>
> Windows does not have provisions to store FIFOs on disk.  The closest
> you get in Windows are Windows named pipes, and those are stored
> non-permanently in a special, temporary filesystem inside the native NT
> namespace.  Try this in Cygwin:
>
>   $ cd /proc/sys/Device/NamedPipe/    <-- trailing slash!
>   $ ls -l
>
> FIFOs in the normal Windows filesystem are a Cygwin fake.

Maybe make pipes in Cygwin symlinks to /proc/sys/Device/NamedPipe/?

> > What does a Linux/FreeBSD FIFO file look like, if you export that
> > filesystem via NFSv3, and mount it via the native Windows NFSv3
> > driver, and do a ls -l in Cygwin?
>
> It looks like a FIFO because MSFT NFSv3 exports the stat(2) info
> verbatim:
>
> linux$ mkfifo blubb
>
> cygwin$ ls -l blubb
> prw-r--r-- 1 corinna vinschen 0 Aug  8 10:22 blubb

Will cygwin treat this as a FIFO?

Can cygwin set the 'p' flag via a magic ioctl?

Thanks,
Martin

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple