From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-9154-mason-zsh=primenet.com.au@sunsite.dk>
Received: (qmail 11347 invoked from network); 25 Jul 2005 05:19:19 -0000
Received: from news.dotsrc.org (HELO a.mx.sunsite.dk) (130.225.247.88)
  by ns1.primenet.com.au with SMTP; 25 Jul 2005 05:19:19 -0000
Received: (qmail 99314 invoked from network); 25 Jul 2005 05:19:12 -0000
Received: from sunsite.dk (130.225.247.90)
  by a.mx.sunsite.dk with SMTP; 25 Jul 2005 05:19:12 -0000
Received: (qmail 28829 invoked by alias); 25 Jul 2005 05:19:05 -0000
Mailing-List: contact zsh-users-help@sunsite.dk; run by ezmlm
Precedence: bulk
X-No-Archive: yes
X-Seq: 9154
Received: (qmail 28819 invoked from network); 25 Jul 2005 05:19:05 -0000
Received: from news.dotsrc.org (HELO a.mx.sunsite.dk) (130.225.247.88)
  by sunsite.dk with SMTP; 25 Jul 2005 05:19:05 -0000
Received: (qmail 98160 invoked from network); 25 Jul 2005 05:19:04 -0000
Received: from ykdmp01.yokohama.riken.go.jp (134.160.82.30)
  by a.mx.sunsite.dk with SMTP; 25 Jul 2005 05:18:59 -0000
Received: (qmail 19959 invoked by uid 0); 25 Jul 2005 14:18:56 +0900
Received: from unknown (HELO jota.gsc.riken.go.jp) (127.0.0.1)
  by 0 with SMTP; 25 Jul 2005 14:18:56 +0900
Received: from ([jota.gsc.riken.go.jp (134.160.84.23)]) by ykdmp01
	(InterScan E-Mail VirusWall Unix); Mon, 25 Jul 2005 14:18:56 +0900 (JST)
Received: from [10.64.67.139] (ipm04.gsc.riken.go.jp [134.160.83.74])
	by jota.gsc.riken.go.jp (Postfix) with ESMTP
	id 1947134854DF; Mon, 25 Jul 2005 14:18:56 +0900 (JST)
In-Reply-To: <1050724093315.ZM20733@candle.brasslantern.com>
References: <DC95ADD4-4F3C-4024-A9BE-242EC503D12C@jota.gsc.riken.go.jp> <1050724093315.ZM20733@candle.brasslantern.com>
Mime-Version: 1.0 (Apple Message framework v733)
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Message-Id: <3BF4526D-BFA6-46C7-A977-BD43DFAD4C07@jota.gsc.riken.go.jp>
Cc: Bart Schaefer <schaefer@brasslantern.com>
Content-Transfer-Encoding: 7bit
From: Wataru Kagawa <wkagawa@jota.gsc.riken.go.jp>
Subject: Re: outputs of _users and _hosts to arrays
Date: Mon, 25 Jul 2005 14:18:55 +0900
To: zsh-users@sunsite.dk
X-Mailer: Apple Mail (2.733)
X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00 autolearn=ham 
	version=3.0.4

Hi Bart,

Thanks for the help.
After googling, I found out that _users extract usernames from /etc/ 
passwd and _hosts extract hostnames from /etc/hosts.

So, I can use parameter expansions like,

users=( ${$( cat /etc/users | cut -d : -f 1,7 | grep -v "#" )//:*/} )
hosts=( ${$( cat /etc/hosts | cut -d : -f 1,7 | grep -v "#" )//:*/} )

to get what I need.