Date: Fri, 25 Nov 2011 00:12:47 -0800 From: Cy Schubert <Cy.Schubert@komquats.com> To: Jason Hellenthal <jhell@DataIX.net> Cc: hackers@FreeBSD.org Subject: Re: cron(8) mis-feature with @reboot long after system startup Message-ID: <201111250812.pAP8ClDw011348@slippy.cwsent.com> In-Reply-To: Message from Jason Hellenthal <jhell@DataIX.net> of "Fri, 25 Nov 2011 02:02:41 EST." <20111125070241.GA7915@DataIX.net>
next in thread | previous in thread | raw e-mail | index | archive | help
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? -- Cheers, Cy Schubert <Cy.Schubert@komquats.com> FreeBSD UNIX: <cy@FreeBSD.org> Web: http://www.FreeBSD.org
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201111250812.pAP8ClDw011348>