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Date: Fri, 6 Jun 2008 14:47:04 -0600 From: Scott Wiersdorf <scott@...ehost.com> To: Andi Kleen <andi@...stfloor.org> Cc: Balbir Singh <balbir@...ibm.com>, linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, matt@...ehost.com Subject: Re: [PATCH 2.6.25-4] getdelays.c: signal handling for log rotation On Fri, Jun 06, 2008 at 03:59:09PM +0200, Andi Kleen wrote: > Scott Wiersdorf <scott@...lcode.org> writes: > > > This adds a USR1 signal handler to getdelays.c, which causes getdelays > > to close its logfile and reopen it (if '-w logfile' is > > specified). This is useful in situations when getdelays is running for > > a long time (i.e, the log file growing) and you need to rotate the > > logs but don't want to lose any log data. > > You could do the same by sending SIGSTOP; copy file; truncate file; SIGCONT Actually, I was wrong in my previous reply. Sorry for my error. The above will work fine (no data loss; I guess the data queues somewhere in some magic way?) I still think a single handler is elegant enough though, and works better with many log rotation systems that want to send a single signal to a pid (it's what we need where I'm working now, hence the patch). Scott -- Scott Wiersdorf <scott@...ehost.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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