Date: Wed, 9 May 2001 10:56:12 +0100 From: Jamie Heckford <heckfordj@psi-domain.co.uk> To: Sean Winn <sean@gothic.net.au> Cc: freebsd-hackers@freebsd.org Subject: Re: bin/27205: Listing all users in the passwd file Message-ID: <20010509105612.A4112@storm.psi-domain.co.uk> In-Reply-To: <5.1.0.14.2.20010509171743.03e700c0@mail.gothic.net.au>; from sean@gothic.net.au on Wed, May 09, 2001 at 08:30:53 %2B0100 References: <20010508153202.9C4B5402EC6@rafiu.psi-domain.co.uk> <5.1.0.14.2.20010509171743.03e700c0@mail.gothic.net.au>
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Good points, glad to see the usual FreeBSD approach of allowing
only the best into the code ;)
Some sort of wrapper makes perfect sense for the sendmail option -
I did think of this, but your right, it is best to assume the
"user-friendly" approach
and not give users tweaking to do out of the box.
Could be a possibilty of adding it as a switch / option to pw(8), with
NIS capabilities? (Rewritten in C of course) Would this be deemed useful
and anyone happy to review a patch?
Jamie
On 2001.05.09 08:30 Sean Winn wrote:
> At 04:32 8/05/01 +0100, you wrote:
>
> > >Number: 27205
> > >Category: bin
> > >Synopsis: Listing all users in the passwd file
> > >Confidential: no
> > >Severity: non-critical
> > >Priority: low
> > >Responsible: freebsd-bugs
> > >State: open
> > >Quarter:
> > >Keywords:
> > >Date-Required:
> > >Class: change-request
> > >Submitter-Id: current-users
> > >Arrival-Date: Tue May 08 08:40:00 PDT 2001
> > >Closed-Date:
> > >Last-Modified:
> > >Originator: Jamie Heckford
> > >Release: FreeBSD 4.2-STABLE i386
> > >Organization:
> >Psi-Domain Limited
> > >Environment:
> >
> >FreeBSD storm.psi-domain.co.uk 4.2-STABLE FreeBSD 4.2-STABLE #2: Fri
> >Mar 2 10:32:25 GMT 2001
> >
> > >Description:
> >
> >I was recently trying to discover a way of getting a list of all users
> on
> >one of my systems, and could not find an easy way to do it.
> >
> >I discovered the following awk script that prints out all users on the
> system
> >(from /etc/passwd). (Courtesy of sendmail.org)
> >
> >awk -F: '$3 > 100 { print $1 }' /etc/passwd
> >
> >Which will print out a list of all users in the passwd file wuth a UID
> greater
> >than 100.
> >
> >Could this be turned into a command such as "userlist", and/or would it
> be
> >deemed usefull?
>
> Not particularly, as it doesn't work with NIS, and won't work with
> nsswitch.conf.
>
> A small perl script or C program using getpwent() in a loop is more
> effective, as it takes into account both NIS and nsswitch.conf
>
>
>
>
> >Another good feature that many people get stuck on is for sending email
> to
> >all users on the system. Maybe it could be included as part of the
> sendmail
> >distro, with something like:
> >
> >awk -F: '$3 > 100 { print $1 }' /etc/passwd > /etc/mail/allusers
>
> Note: it also picks up 'nobody'
>
> >and put in cron.daily.
> >
> >This could then be a default in /etc/mail/aliases:
> >
> >allusers: :include:/etc/mail/allusers
> >
> >What do you think? :)
>
> Sure. Give spammers one address to email *everyone* on your system in one
>
> fell swoop...
>
> In itself, it's a bad default; I'd use a small script that actually
> checks
> the source address (yes, easily forged, but rarely done on incoming spam)
>
> before sending out the email to all users.
>
> In fact, that's what I do...
>
> (http://www.gothic.net.au/dist/allusers.c)
>
> The domain and group are hardcoded, but easy enough to change.
>
> >Jamie
> >
> >
> > >How-To-Repeat:
> >
> >userlist
> >--------
> >
> >awk -F: '$3 > 100 { print $1 }' /etc/passwd
> >
> >Sendmail
> >-------
> >
> >awk -F: '$3 > 100 { print $1 }' /etc/passwd > /etc/mail/allusers
> >echo "allusers: :include:/etc/mail/allusers" >> /etc/aliases ;
> newaliases
> >echo "#\!/bin/sh" > /etc/periodic/daily/350.allusers
> >echo "awk -F: '$3 > 100 { print $1 }' /etc/passwd > /etc/mail/allusers"
> >>
> >/etc/periodic/daily/350.allusers
> >chmod 0755 /etc/periodic/daily/350.allusers
> >
> > >Fix:
> >
> >Tested the above and worked fine, just need someone to tell me its great
> >or completly useless! :)
> >
> > >Release-Note:
> > >Audit-Trail:
> > >Unformatted:
> >
> >To Unsubscribe: send mail to majordomo@FreeBSD.org
> >with "unsubscribe freebsd-bugs" in the body of the message
>
>
>
--
Jamie Heckford
Network Operations Manager
Psi-Domain - Innovative Linux Solutions. Ask Us How.
FreeBSD - The power to serve
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