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From: rjd@tiger.UUCP
Newsgroups: comp.unix.wizards
Subject: Re: Built-in login command (/bin/lo
Message-ID: <142700003@tiger.UUCP>
Date: Mon, 15-Jun-87 18:49:00 EDT
Article-I.D.: tiger.142700003
Posted: Mon Jun 15 18:49:00 1987
Date-Received: Sun, 21-Jun-87 10:43:24 EDT
References: <91@decvax.UUCP>
Lines: 17
Nf-ID: #R:decvax.UUCP:-9100:tiger.UUCP:142700003:000:655
Nf-From: tiger.UUCP!rjd    Jun 15 17:49:00 1987


> 	Back at U. of NH, I discovered by accident that if
> 	I ran /bin/login directly (not "exec" it, which the
> 	builtin shell command "login" does) and logged into
> 	an account with no password (they had a captive
> 	account which ran /bin/who), when /bin/login exited
> 	the entry in the /etc/utmp kept the new login name.
> 
> 	Then (I don't know if it is true anymore) mail used
> 	to use the /etc/utmp entry (given by: who am i)
> 	instead of by uid (given by: whoami).

   Interesting, AT&T Sys V, release 2.0 and 3.0 's mail command uses your
LOGNAME variable as a first choice as your ID when sending mail.  (Probably
and unimportant bug...)

rjd