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Date: Mon, 9 Sep 2024 13:57:44 +0200
Message-ID: <CAKAoaQnd=saPbOktVfnp_hPezUJJpDvCAYyEU4u7T6NKUOONeQ@mail.gmail.com>
Subject: FIFO with group-only permissions fails with "Permission denied" ...
To: cygwin AT cygwin DOT com
From: Roland Mainz via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Roland Mainz <roland DOT mainz AT nrubsig DOT org>
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Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

Hi!

----

I'm trying to create a Cygwin FIFO which can only be read and written by admins:
---- snip ----
# as admin
mkfifo system_cmd_fifo
chgrp 544 system_cmd_fifo
chmod a-rwx,g+rw system_cmd_fifo
cat <system_cmd_fifo
---- snip ----
... but the "cat <system_cmd_fifo" returns a "Permission denied" error...

Why does this happen - because Group "544" ("Administratoren") is not
a user SID ?

----

Bye,
Roland
-- 
  __ .  . __
 (o.\ \/ /.o) roland DOT mainz AT nrubsig DOT org
  \__\/\/__/  MPEG specialist, C&&JAVA&&Sun&&Unix programmer
  /O /==\ O\  TEL +49 641 3992797
 (;O/ \/ \O;)

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