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Date:      Wed, 10 Feb 1999 15:02:57 +1030
From:      Greg Lehey <grog@lemis.com>
To:        Matthew Hunt <mph@pobox.com>
Cc:        Gregory Sutter <gsutter@pobox.com>, freebsd-questions@FreeBSD.ORG
Subject:   Re: finger
Message-ID:  <19990210150256.I71962@freebie.lemis.com>
In-Reply-To: <19990209194213.A89829@wopr.caltech.edu>; from Matthew Hunt on Tue, Feb 09, 1999 at 07:42:13PM -0800
References:  <XFMail.990210113213.keith@apcs.com.au> <Pine.BSF.4.05.9902092011100.388-100000@nyc-ny69-14.ix.netcom.com> <19990209190356.A7841@orcrist.mediacity.com> <19990210135059.G71962@freebie.lemis.com> <19990209194213.A89829@wopr.caltech.edu>

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On Tuesday,  9 February 1999 at 19:42:13 -0800, Matthew Hunt wrote:
> On Wed, Feb 10, 1999 at 01:50:59PM +1030, Greg Lehey wrote:
>
>> How can you know it's a finger from root?
>
> Check the EUID in hide() in src/usr.bin/finger/util.c; in inetd.conf,
> run fingerd as nobody (which is the default).
>
> (I don't think anybody's expecting "finger @localhost" by root to
> recognize your rootfulness.)
>
> With this change, I think everything works per Greg's wishes:
>
> wopr:~$ whoami
> mph
> wopr:~$ touch .nofinger
> wopr:~$ finger
> No one logged on.
> wopr:~$ sudo finger
> Login            Name                 TTY  Idle  Login Time   Office  Phone
> mph              Matthew Hunt         p1         Jan 30 14:11 03 Robi +1 626 39
> mph              Matthew Hunt         p4         Jan 30 15:27 03 Robi +1 626 39
> mph              Matthew Hunt         p5     23  Feb  1 20:42 03 Robi +1 626 39
> wopr:~$ finger @localhost
> [localhost]
> No one logged on.

Hmm.  These may be Greg's wishes, in which case that's OK.  But that's
not the purpose of finger.  There are other tools to look at users on
localhost; the normal use of finger is across the network, and this
hack doesn't work there.

Greg
--
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