Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!purdue!decwrl!sgi!arisia!quintus!ok
From: ok@quintus.uucp (Richard A. O'Keefe)
Newsgroups: comp.unix.wizards
Subject: TMPDIR (was Re: Nasty Security Hole?)
Keywords: mail permissions security
Message-ID: <755@quintus.UUCP>
Date: 27 Nov 88 07:06:56 GMT
References: <175@ernie.NECAM.COM> <189@wyn386.UUCP> <2955@ingr.UUCP> <1031@alobar.ATT.COM> <6527@june.cs.washington.edu>
Sender: news@quintus.UUCP
Reply-To: ok@quintus.UUCP (Richard A. O'Keefe)
Distribution: na
Organization: Quintus Computer Systems, Inc.
Lines: 13

In article <6527@june.cs.washington.edu> ka@june.cs.washington.edu (Kenneth Almquist) writes:
>It would certainly possible for AT&T to give each user his or her own
>temporary directory and to modify the standard System V programs to use
>this directory.

See TEMPNAM(BA_LIB) in the SVID.
	char *tempnam(char *dir, char *prefix)
If TMPDIR is defined in the user's environment and can be used, use that.
If dir is non-NULL and names a usable directory, use that.
If P_tmpdir (in <stdio.h>, usually /usr/tmp/) is usable, use that.
Use /tmp only as a last resort.

(Yes, that's right, $TMPDIR over-rides the dir argument.)