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From: chris@umcp-cs.UUCP (Chris Torek)
Newsgroups: net.unix-wizards
Subject: Re: UUCP USERFILE
Message-ID: <2266@umcp-cs.UUCP>
Date: Fri, 4-Jul-86 13:45:46 EDT
Article-I.D.: umcp-cs.2266
Posted: Fri Jul  4 13:45:46 1986
Date-Received: Sat, 5-Jul-86 06:45:19 EDT
References: <1759@brl-smoke.ARPA> <976@decuac.DEC.COM> <121@radha.UUCP>
Reply-To: chris@maryland.UUCP (Chris Torek)
Organization: University of Maryland, Dept. of Computer Sci.
Lines: 15

In article <121@radha.UUCP> sanand@radha.UUCP (Sanand Patel) writes:
>As an aside, I don't see how uucp *could* get the login name with
>out searching /etc/passwd for the current UID. The only other (very
>unreliable) way is to find the major/minor of standard-input and search
>/dev and then search the 'who' file (utmp?). I *don't think* DEC would
>do this.

It is not unreliable, and in fact is rather common.  There is a C
library routine, getlogin(), to do this.  Incidentally (in re the
recent commotion in net.bugs.4bsd), this defeats the effect of
`su', but not that of `rlogin'.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 1516)
UUCP:	seismo!umcp-cs!chris
CSNet:	chris@umcp-cs		ARPA:	chris@mimsy.umd.edu