Date: Wed, 16 Dec 2009 13:13:13 +0700 From: Eugene Grosbein <eugen@eg.sd.rdtc.ru> To: Holger Kunst <hkunst@moneyfitness.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Email sent from "at" command going to the wrong account Message-ID: <4B287A79.6090604@eg.sd.rdtc.ru> In-Reply-To: <4B265E27.8050906@moneyfitness.com> References: <4B265E27.8050906@moneyfitness.com>
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Holger Kunst wrote: > Hi, > > The "at" command sends an email with the output of the scheduled job. > I've experienced inconsistent results when running jobs, receiving > emails in accounts not associated with the user currently logged in. > > To reproduce in FreeBSD 7.2-RELEASE-p2 > > Case #1 > login as user a (new shell through ssh) > echo "echo 1" | at now > --> user a will receive an email containing "1" - this is as expected > > Case #2 > login as user a (new shell through ssh) > login as user b > exit > echo "echo 1" | at now > --> user b will receive an email containing "1" - this is not as > expected, since I am user a again > > A look at the source for "at" reveals that "at" is getting the mailname > from getlogin(). Running a small test program that outputs getlogin(), > confirms the above behavior: A log-in and out of another account makes > getlogin() return that account's name, even though the shell has been > closed and we are back to the original shell and the original user a. > > Is this the intended behavior? Any hints would be appreciated. This is known long-standing bug. FreeBSD-4.9 was affected (may be earlier) and all versions after it: http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/61355 The PR has some kind of patch in the Audit-Trail. Eugene Grosbein
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