From owner-freebsd-questions@FreeBSD.ORG  Tue Aug  2 13:34:42 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@freebsd.org
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 9304F16A41F
	for <freebsd-questions@freebsd.org>;
	Tue,  2 Aug 2005 13:34:42 +0000 (GMT)
	(envelope-from simon@comsys.ntu-kpi.kiev.ua)
Received: from comsys.ntu-kpi.kiev.ua (comsys.ntu-kpi.kiev.ua
	[195.245.194.142])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 7466F43D48
	for <freebsd-questions@freebsd.org>;
	Tue,  2 Aug 2005 13:34:33 +0000 (GMT)
	(envelope-from simon@comsys.ntu-kpi.kiev.ua)
Received: from pm514-9.comsys.ntu-kpi.kiev.ua (pm514-9.comsys.ntu-kpi.kiev.ua
	[10.18.54.109]) (authenticated bits=0)
	by comsys.ntu-kpi.kiev.ua (8.12.10/8.12.10) with ESMTP id
	j72DfK0R085882
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Tue, 2 Aug 2005 16:41:21 +0300 (EEST)
Received: by pm514-9.comsys.ntu-kpi.kiev.ua (Postfix, from userid 1000)
	id 56580329; Tue,  2 Aug 2005 16:32:15 +0300 (EEST)
Date: Tue, 2 Aug 2005 16:32:15 +0300
From: Andrey Simonenko <simon@comsys.ntu-kpi.kiev.ua>
To: Joerg Pulz <Joerg.Pulz@frm2.tum.de>
Message-ID: <20050802133215.GA1812@pm514-9.comsys.ntu-kpi.kiev.ua>
References: <3040.217.37.3.201.1122457154.squirrel@www.orbweavers.co.uk>
	<20050802111343.GA1545@pm514-9.comsys.ntu-kpi.kiev.ua>
	<3930.217.37.3.201.1122984256.squirrel@www.orbweavers.co.uk>
	<20050802141953.K72944@hades.admin.frm2>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20050802141953.K72944@hades.admin.frm2>
User-Agent: Mutt/1.4.2.1i
X-Virus-Scanned: ClamAV 0.82/989/Sat Jul 23 00:27:30 2005 on
	comsys.ntu-kpi.kiev.ua
X-Virus-Status: Clean
Cc: martin@orbweavers.co.uk, freebsd-questions@freebsd.org
Subject: Re: LDAP/nss_ldap adduser script
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 02 Aug 2005 13:34:42 -0000

On Tue, Aug 02, 2005 at 02:24:26PM +0200, Joerg Pulz wrote:
> >user_base=`awk '/nss_base_passwd/ {print $2}' /etc/ldap.conf | cut -f1 -d?`
> >get_next_uid() {
> >
> >       lastuid=`ldapsearch -LLL -b "$user_base"
> >"objectclass=posixAccount" |\
> >                awk '/uidNumber/ {print $2}' | sort | tail -n1`
> >       if [ -z "$lastuid" ]; then
> >               uid=$startuid
> >       else
> >               uid=`expr $lastuid + 1`
> >       fi
> >}

#!/bin/sh

uid_min=1000
uid_max=2000

get_uid()
{
	uid=${uid_min}
        sort -g list-uid | while read uid_used; do
		if [ ${uid} -eq ${uid_used} ]; then
			uid=`expr ${uid} + 1`
			if [ ${uid} -eq ${uid_max} ]; then
				echo "Out of UID numbers";
				exit 1
			fi
		else
			echo "${uid}"
			break;
		fi
	done
}

uid=`get_uid`
if [ $? -ne 0 ]; then
	echo ${uid}
	exit 1
fi
echo "Lowest unused UID: ${uid}"

> so, why all this scripting?? you could simply use the following line to 
> get the next free uid (as long as the system is configured to use LDAP 
> accounts)

Because everyone has own environment and not enough details about
his/her environment give many solutions, sometimes not optimal for
another environment.  Yours idea is good (if LDAP accounts work on
the system), especially that pw uses bitmap to find first unused UID
(if reuseuids is 'yes').

> the 'cut' is necessary as 'pw usernext' reports the next free uid:gid in 
> combination (is this a bug??)

This is documented in pw(8) manual page.