From owner-freebsd-questions  Tue May 15 19:35:40 2001
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To: "Don O'Neil" <don@whtech.com>
Cc: freebsd-questions@FreeBSD.ORG
From: David Kelly <dkelly@hiwaay.net>
Subject: Re: Help w/ Awk 
In-reply-to: Message from "Don O'Neil" <don@whtech.com> 
   of "Tue, 15 May 2001 18:09:34 PDT." <MOBBIPGJKBNNPGLGMFHFIEIBHCAA.don@whtech.com> 
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Date: Tue, 15 May 2001 21:33:40 -0500
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"Don O'Neil" writes:
> I'm trying to write a simple script to extract the user name, UID and GID of
> each user in the /etc/passwd file and I'm not quite sure what I'm doing
> wrong here.... here's a code snippet;

Let awk parse the entire passwd file. Don't bother launching awk for 
each and every line, its wasteful.

Try this on for size:

grumpy: {1013} cat junk.awk
#!/usr/bin/awk -f

BEGIN {
        FS =":"
}

{
        print $1
}
grumpy: {1014} ./junk.awk /etc/passwd
# $FreeBSD
#
root
toor
daemon
operator
...

Or better yet with a trival mod to drop the # lines:

grumpy: {1023} cat junk.awk 
#!/usr/bin/awk -f

BEGIN {
        FS =":"
}

!/^\#/ {
        print $1
}
grumpy: {1024} ./junk.awk /etc/passwd
root
toor
daemon
operator
...

-- 
David Kelly N4HHE, dkelly@hiwaay.net
=====================================================================
The human mind ordinarily operates at only ten percent of its
capacity -- the rest is overhead for the operating system.



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