getlogin() problem

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#105

From: Don Costello
Date: Thu, 23 Jul 1992 20:55

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Hi.  I've labored over this for quite some time and can't seem to figure
it out.

I have a C program that checks for new/existing mail.  I use the
getlogin call, appended to "/usr/spool/mail/" to get the mailbox for the
user checking his/her mail.

The problem is when I "su" from one login to another (su - otheruser)
and run the program, getlogin() returns the login id of the original
user (the one su'ed from) not the current login.

Is there an explanation/fix for this??

If it matters, I'm on a Gould 9050 running BSD4.3.  However, it behaves the
same on a 3B2 (Sys V Rel 3.2.2) and Gould NP1 (BSD4.3).

Any help would greatly reduce the risk of hair loss :-).

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| Don Costello, DASC-ZSC             |  It's hard to cram this   |
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Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!udecc.engr.udayton.edu!blackbird.afit.af.mil!dsacg3.dsac.dla.mil!dsac.dla.mil!hq.dla.mil!fazc016
From: fazc016@hq.dla.mil (Don Costello)
Newsgroups: comp.unix.programmer
Subject: getlogin() problem
Message-ID: <832@hq.dla.mil>
Date: 23 Jul 92 20:55:05 GMT
Organization: HQ Defense Logistics Agency/DASC, Cameron Station, VA
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