Path: utzoo!utgpu!attcan!uunet!peregrine!elroy!ames!ncar!tank!uxc!uxc.cso.uiuc.edu!uxg.cso.uiuc.edu!uicsrd.csrd.uiuc.edu!kai
From: kai@uicsrd.csrd.uiuc.edu
Newsgroups: comp.unix.wizards
Subject: Re: getuid() and geteuid() on Ultrix 2.
Message-ID: <43200049@uicsrd.csrd.uiuc.edu>
Date: 1 Nov 88 10:07:00 GMT
References: <579@jim.odr.oz>
Lines: 9
Nf-ID: #R:jim.odr.oz:579:uicsrd.csrd.uiuc.edu:43200049:000:383
Nf-From: uicsrd.csrd.uiuc.edu!kai    Nov  1 04:07:00 1988


The "getlogin()" call returns the userid from the entry for the control
terminal in /etc/utmp, usually, the userid used to login on that terminal.
However, inside programs that use pseudo terminals, such as script, window,
etc., this call returns NULL, because those programs don't make utmp entries
for the pseudo terminal.


Patrick Wolfe  (pwolfe@kai.com, uunet!kailand!pwolfe)