Date: Fri, 25 Nov 2011 00:42:25 -0800 From: Doug Barton <dougb@FreeBSD.org> To: Cy Schubert <Cy.Schubert@komquats.com> Cc: Jason Hellenthal <jhell@DataIX.net>, hackers@FreeBSD.org Subject: Re: cron(8) mis-feature with @reboot long after system startup Message-ID: <4ECF54F1.50203@FreeBSD.org> In-Reply-To: <201111250812.pAP8ClDw011348@slippy.cwsent.com> References: <201111250812.pAP8ClDw011348@slippy.cwsent.com>
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On 11/25/2011 00:12, Cy Schubert wrote: > In message <20111125070241.GA7915@DataIX.net>, Jason Hellenthal writes: >> List, >> >> When using @reboot with cron you expect your proccesses to always start when >> the system boots up and only when the system boots. But long after the system >> in question had been booted, my @reboot processes ran again! after a (/etc/r >> c.d/cron restart). This is normally fine and dandy until one of your @reboot >> jobs needs to contain a process that purges files "files that are already in >> use by a running daemon since the system has not rebooted" and becomes hazard >> ous. >> >> So with that said... is there a way we could actually make this run @reboot o >> nly ? >> >> Compare the system boottime (kern.boottime) to the current time and if it is >> greater than ?5 minutes? do not run on any @reboot's ? or add yet another ext >> ension @boottime so it does not throw off current functionality ? >> >> Surely I could modify the scripts which do this but I find it unproductive an >> d counter intuitive for the need to explain that @reboot means "When cron is >> restarted" even though the name means something completely opposite. > > I don't see how cron could run reboot jobs again while running. It calls > run_reboot_jobs only during startup. Could it be possible that cron died on > your system and you restarted it? Please read the OP again carefully. -- "We could put the whole Internet into a book." "Too practical." Breadth of IT experience, and depth of knowledge in the DNS. Yours for the right price. :) http://SupersetSolutions.com/
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