how about nameing the file with time() On Sun, 14 Sep 2003 13:29:22 -0700 - "Net Llama!" <[EMAIL PROTECTED]> wrote the following Re: Re: Frequent job scheduling like cron
>On 09/14/03 13:13, Michael Hipp wrote: >> I have a job I need to run automatically at about every 5 minutes. Cron >> could certainly do that. But if the job should run long, I don't want it >> to be started again while a previous instance is still running. And if >> the job should run 4.5 minutes, I don't necessarily want it to run again >> in 30 seconds, tho that wouldn't be fatal. >> >> I could just use a script with a delay at the end before it loops back >> to the top, but that's crude and not particularly reliable. >> >> Any clever, robust way to do this? > >with cron & an a more intelligent script :) > >seriously, you can have your script create some kind of lock file, and then >whenever it runs, check for the existence of the lock file before >proceeding. if it doesn't find one, then it should create a new lock file, >do its thing, and when completed, delete its lock file. > >if you don't want it to do anything if its been more than a specific since >the last one finished, you'll need to add some time/date stamp analysis >functionality to the script so that it can determine how long its been >since the last job ran. perhaps creating both a lock file, which is >transient, and another file that just gets the output from 'date' cat'ed >into it when the last job finishes. > >-- >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >L. Friedman [EMAIL PROTECTED] >Linux Step-by-step & TyGeMo: http://netllama.ipfox.com > > 1:25pm up 1 day, 19:53, 2 users, load average: 0.01, 0.11, 0.12 > >_______________________________________________ >Linux-users mailing list >[EMAIL PROTECTED] >Unsubscribe/Suspend/Etc -> >http://www.linux-sxs.org/mailman/listinfo/linux-users _______________________________________________ Linux-users mailing list [EMAIL PROTECTED] Unsubscribe/Suspend/Etc -> http://www.linux-sxs.org/mailman/listinfo/linux-users
