X-Recipient: archive-cygwin AT delorie DOT com
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B3FA638582BB
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1710120676;
	bh=FQ8Nh1Vlq2lcY+VmAUoSXNk5wNpTg5EtywKjLWkfvPA=;
	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=S6sPVwiKKmPwyieTjOKRiDrPPdfRwOUC/j4YZI0uG7ZvP4Ov/ttftQG2rDwbVfaAA
	 RqdwB5hliNKiGqNUS/aOxaPjbxDTGsmdgcyh1S9wf/B3PXJU+eMcjN24RBpPSDMIFP
	 OgFps+cKHCHx0D9+180tOMYPfZGaMEZwg47nkH1Y=
X-Original-To: cygwin AT cygwin DOT com
Delivered-To: cygwin AT cygwin DOT com
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 2A0E4385842D
ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 2A0E4385842D
ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1710120653; cv=none;
 b=FG3iMU5sdzLgs40uPdP9w9rnPbfZw5W630M+Rqkm4gR1q94Y70hIgLTLTjN69TjMrLq5oRm8yVCqTGuDWfeVt/aI+kQ+xoo6B66d7NBvSa8r0zwx2UI5qQnv4yzUp7uNRlnhgXUq7RCtnBBXWDRJG/vi/6KFNw/16+rCoY2zyoo=
ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key;
 t=1710120653; c=relaxed/simple;
 bh=2v6KBNJ3P1SVCk3qryVpKfPYLca3ey/q4MTKFPcXnaQ=;
 h=DKIM-Signature:MIME-Version:From:Date:Message-ID:Subject:To;
 b=H09655X40QRo5/Dsht3FXMIXXOxm94PK6cgkwlbovX8IKXQu2JpPYYv8cjQ+vglcV/nj5mLjwNMRa6SOogdyIPQqR671nEFb5g2lLvgcQrGWCOL6TC4gJkMxx+tP/iuN2UqFFc56K69POsWPMHw+yKgqzp0iD/hxyE7AqS3vKDE=
ARC-Authentication-Results: i=1; server2.sourceware.org
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20230601; t=1710120648; x=1710725448;
 h=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=JDNnuy5sB7Rert0EoLQgwfMaObc4muLY9fktV8x5N0k=;
 b=lmb4kXm3WfwJ7QLtk2RV53z0teBfaKMt+t079xY5Z9qWz1IQef9ehVHEieC8a2ZsfW
 MxNuRHGBJFqQ5fKWE8U60XHsE4EmY0UDecIa4W77SqjikLcEQBZfxC1YtYPLT4JX8tkS
 b7H7k5b4BSt9+s8yZbOXtvg9s0229uOy1qCKB67MhAPFkegWbbFyly6CAKCUK3cqb88T
 Pbc/Sr862cYlS1gb2wcVZ4iH9B/NMKXQqkeAWfaUkt/nFvomVxWfcr4t+WSM1ep4sRb7
 ep0X9pUXek8OzgdoYBiOX8ivoBP3KQpNu1PgvG4bWPkhOAlze5Vf6HU7CvkVpmSxtzbI
 5n2w==
X-Gm-Message-State: AOJu0YwqBXI1Tx6ZGQBZJzauQaQQvnWAujYtZ7Xj3y796d7b7iPoTFVK
 Uek89fjSt5raWLfYmpfQ/0cwvCgxSTScN/5BeOhccKWxCCernm4jaCzvWe9dcMRqGfSna7Y6avU
 stoENq5CkJfZ8kaOg0kvN8kSAdDPfyH2Z
X-Google-Smtp-Source: AGHT+IEt/KJhLpfiTwjWqJpniVxyLCJVH/H/Z2L18mF0afQF/ABg2B0HBsw5xQGDG6DuJu8lWKEza++mhx5m/fWrNXA=
X-Received: by 2002:a2e:8e3a:0:b0:2d2:a8b3:a20e with SMTP id
 r26-20020a2e8e3a000000b002d2a8b3a20emr2855751ljk.53.1710120648057; Sun, 10
 Mar 2024 18:30:48 -0700 (PDT)
MIME-Version: 1.0
References: <CAKAoaQnFxij4Np-jg+bOLEpiSziCfamFrJ2FR_JeO+Sv_Td2Kg AT mail DOT gmail DOT com>
 <ZdecXZNUgQ3i0hYN AT calimero DOT vinschen DOT de>
 <CAKAoaQ=rCwVHnHAqfd5C3kC45GPE4ZHbbgCWrdM64sojLMuMyA AT mail DOT gmail DOT com>
 <Zdi-CnGX3CwWA0nl AT calimero DOT vinschen DOT de>
 <CAKAoaQ=kLW3houqanjcN9Qk1++BtgW-dNRiXjLYwCRTYEzoN=w AT mail DOT gmail DOT com>
 <CAAvCNcCHAVooYX2_tUHHnUYvWRKHWhBwxmKws7AcqjOo-sQd+g AT mail DOT gmail DOT com>
 <Zdnq5yJha75NTpgd AT calimero DOT vinschen DOT de>
 <CAAvCNcAEAr0gFdR_excafHq8+cYjDvf_APb1So-AAWGSu2+zTQ AT mail DOT gmail DOT com>
 <ZehpEr18QUP6C3Ge AT calimero DOT vinschen DOT de> <ZezUG1aiwd3t28U7 AT xps13>
In-Reply-To: <ZezUG1aiwd3t28U7@xps13>
Date: Mon, 11 Mar 2024 02:30:17 +0100
Message-ID: <CAAvCNcC=RpUgEia3vcZXqRD4CgyYnFRWXA3O+Kwfi3kQTNjD8A@mail.gmail.com>
Subject: Re: Switching groups with newgrp - how to get the new group with
 |GetTokenInformation()| ?
To: cygwin AT cygwin DOT com
X-Spam-Status: No, score=0.1 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,
 T_SCC_BODY_TEXT_LINE 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: 2.1.30
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: Dan Shelton via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Dan Shelton <dan DOT f DOT shelton AT gmail DOT com>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>

On Sat, 9 Mar 2024 at 22:27, Glenn Strauss via Cygwin <cygwin AT cygwin DOT com> wrote:
>
> On Wed, Mar 06, 2024 at 02:01:06PM +0100, Corinna Vinschen via Cygwin wrote:
> > On Mar  5 23:38, Dan Shelton via Cygwin wrote:
> > > On Sat, 24 Feb 2024 at 14:11, Corinna Vinschen via Cygwin
> > > <cygwin AT cygwin DOT com> wrote:
> > > >
> > > > On Feb 23 22:15, Dan Shelton via Cygwin wrote:
> > > > > HOWEVER, there is another Cygwin bug:
> > > > > "getent group mywingrp1" does not list any group members, even after
> > > > > "net localgroup mywingrp1 mywinuser44 /add", which is a POSIX
> > > > > violation.
> > > >
> > > > Not a bug.  Two problems:
> > > >
> > > > - Getting members of a group can be an extremly costly operation
> > > >   in a domain or, worse, a domain forest, or even worse, if the
> > > >   domain or domain forest is remote.
> > > >
> > > > - Alonmg the same lines, getting members of a group can be extremly
> > > >   costly in big orgs with thousands of users.  Nobody want's to clutter
> > > >   up space with the list of members in the "Domain Users" group.
> > > >
> > > > - Permissions to enumerate members of a group are restricted.
> > > >   By default only admins and group members are allow to enumerate
> > > >   members and this can be restricted further by domain admins.
> > > >
> > > > Therefore we dropped even trying to populate gr_mem, considering
> > > > that even in its original form on Unix systems, it's used only
> > > > to add supplementary groups.  To do this right on Windows is even
> > > > more costly than blindly enumerating.
> > > >
> > > > It's not a bug, it's a feature :)
> > >
> > > Could you add an option to getent so that the full lookup can be
> > > requested via command line, pls?
> >
> > That's not possible.  getent just calls getpwent/getgrent.
> >
> > > Always editing /etc/nsswitch.conf
> > > forth and back is not a elegant solution, aside from race conditions
> > > with other users on a system
> >
> > So, here we go again.
> >
> > - What exactly are you trying to accomplish by enumerating the accounts?
> >   Maybe you won't actually need it for your task at hand.
> >
> > - Why do you have to change nsswitch.conf "back and forth"?
> >   Just change it once and you're done.
> >
> >
> > Corinna
>
> Hello
> > > Dan Shelton - Cluster Specialist Win/Lin/Bsd
>
> > > Always editing /etc/nsswitch.conf
> > > forth and back is not a elegant solution, aside from race conditions
> > > with other users on a system
>
> Please check the man page for getent.
>
> man getent
> getent --help
>
> You can use -s or --service to override the service used without
> editing nsswitch.conf.  The man page on Linux provides an example
> with a bit more details than the man page for getent under cygwin.
> https://www.man7.org/linux/man-pages/man1/getent.1.html

Is this feature supported under Cygwin /usr/bin/getent?

I tried it, but did not see any change. Even putting garbage into it,
e.g. /usr/bin/getent -s "$(man man)" group foo does not yield an
error.

Dan
-- 
Dan Shelton - Cluster Specialist Win/Lin/Bsd

-- 
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