From owner-freebsd-stable@FreeBSD.ORG  Tue Dec 18 20:26:36 2007
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 9115016A46B
	for <stable@freebsd.org>; Tue, 18 Dec 2007 20:26:36 +0000 (UTC)
	(envelope-from 000.fbsd@quip.cz)
Received: from elsa.codelab.cz (elsa.codelab.cz [82.208.36.70])
	by mx1.freebsd.org (Postfix) with ESMTP id 41B4713C465
	for <stable@freebsd.org>; Tue, 18 Dec 2007 20:26:36 +0000 (UTC)
	(envelope-from 000.fbsd@quip.cz)
Received: from localhost (localhost.codelab.cz [127.0.0.1])
	by elsa.codelab.cz (Postfix) with ESMTP id A947619E023;
	Tue, 18 Dec 2007 21:06:54 +0100 (CET)
Received: from [192.168.1.2] (r3a200.net.upc.cz [213.220.192.200])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by elsa.codelab.cz (Postfix) with ESMTP id 9774E19E019;
	Tue, 18 Dec 2007 21:06:48 +0100 (CET)
Message-ID: <47682873.8050601@quip.cz>
Date: Tue, 18 Dec 2007 21:07:15 +0100
From: Miroslav Lachman <000.fbsd@quip.cz>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US;
	rv:1.7.12) Gecko/20050915
X-Accept-Language: cz, cs, en, en-us
MIME-Version: 1.0
To: Anton - Valqk <lists@lozenetz.org>
References: <4767E08C.2090803@lozenetz.org>
In-Reply-To: <4767E08C.2090803@lozenetz.org>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Cc: stable@freebsd.org
Subject: Re: jlogin.sh - a small nice jails helper!
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 18 Dec 2007 20:26:36 -0000

Anton - Valqk wrote:

> Because I'm lazy and love the scripts, I wrote a nice small script that
> matches a jailname and do a jexec JAILPID SHELL
> so I can login fast to my jails.
> According to me, there should be such tool!
> Hopes something like this goes to STABLE!
> 
> here it is....
> 
> #!/bin/sh
> loginSHELL="/bin/tcsh"
> [ -z "$1" ] && echo "No jail specified." && exit 1;
> jName=$1;
> jID=`jls | awk '{print $1,$3}'|grep $jName|awk '{print $1}'`
> jRealName=`jls | awk '{print $1,$3}'|grep $jName|awk '{print $2}'`
> [ -z "$jID" ] && echo "No such jail name $jName!" && exit 1;
> echo "Logging in to $jRealName"
> jexec $jID $loginSHELL

It is nice idea, but I think you should have a better scripting style ;)

#!/bin/sh

login_shell="/bin/tcsh"

if [ -z "$1" ]; then
         echo "No jail specified."
         exit 1
fi

jail_name=$1
jail_id=`jls | awk '$3 ~ /^'${jail_name}'\./ { print $1 }'`
jail_hostname=`jls | awk '$3 ~ /^'${jail_name}'\./ { print $3 }'`

if [ -z "$jail_id" ]; then
         echo "No such jail name ${jail_name}!"
         exit 1
fi

echo "Logging in to ${jail_hostname}"
jexec $jail_id $login_shell



And still there are some imperfections.
1) script assume first part of a hostname as name, but in the rc.conf 
jail name can be different
2) script does not expect multiple occurrence of the same first part of 
a hostname
	example: johndoe.example.org and johndoe.comethingelse.org
3) script does not expect multiple occurrence of exactly matching 
hostname (coused by jail zombies)

Miroslav Lachman