From owner-freebsd-questions  Sat Mar  9 13:15: 1 2002
Delivered-To: freebsd-questions@freebsd.org
Received: from mailsrv.otenet.gr (mailsrv.otenet.gr [195.170.0.5])
	by hub.freebsd.org (Postfix) with ESMTP id 823B737B417
	for <freebsd-questions@freebsd.org>; Sat,  9 Mar 2002 13:14:51 -0800 (PST)
Received: from hades.hell.gr (patr530-a076.otenet.gr [212.205.215.76])
	by mailsrv.otenet.gr (8.12.2/8.12.2) with ESMTP id g29LEdft010020;
	Sat, 9 Mar 2002 23:14:40 +0200 (EET)
Received: from hades.hell.gr (hades [127.0.0.1])
	by hades.hell.gr (8.12.2/8.12.2) with ESMTP id g29LET1t054156;
	Sat, 9 Mar 2002 23:14:38 +0200 (EET)
	(envelope-from keramida@freebsd.org)
Received: (from charon@localhost)
	by hades.hell.gr (8.12.2/8.12.2/Submit) id g29HRqfM015753;
	Sat, 9 Mar 2002 19:27:52 +0200 (EET)
	(envelope-from keramida@freebsd.org)
X-Authentication-Warning: hades.hell.gr: charon set sender to keramida@freebsd.org using -f
Date: Sat, 9 Mar 2002 19:27:52 +0200
From: Giorgos Keramidas <keramida@ceid.upatras.gr>
To: Steve Tremblett <sjt@cisco.com>
Cc: Steven Lake <raiden@shell.core.com>,
	freebsd-questions@freebsd.org
Subject: Re: Selectively forbidding login
Message-ID: <20020309172752.GI15318@hades.hell.gr>
References: <Pine.GSO.4.44L0.0203081657180.5259-100000@shell.core.com> <20020308181812.A8403@sjt-u10.cisco.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20020308181812.A8403@sjt-u10.cisco.com>
User-Agent: Mutt/1.3.27i
Sender: owner-freebsd-questions@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-questions.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-questions>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-questions>
X-Loop: FreeBSD.ORG

On 2002-03-08 18:18, Steve Tremblett wrote:
> I believe a user will be allowed FTP login if their shell is in
> /etc/shells.  I'm not %100 sure on what nologin does (not on a FreeBSD
> box right now), but I'm guessing that if it is a shell that is made up
> of something like "int main() { return 0; }" it should be safe to put
> in /etc/shells.

It's very easy to find out:

	hades:~$ file /sbin/nologin
	/sbin/nologin: Bourne shell script text executable
	hades:~$ grep -v '^#' /sbin/nologin

	echo 'This account is currently not available.'
	exit 1

But even if it wasn't a shell script, you can read the source at
/usr/src/sbin/nologin.  The wonders of Open Source :)))

Giorgos Keramidas                       FreeBSD Documentation Project
keramida@{freebsd.org,ceid.upatras.gr}  http://www.FreeBSD.org/docproj/

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message