Ask cron to wait for the job to finish before restarting

Question

I have a cronjob that runs every second minute, which usually runs in seconds, but sometimes within a few minutes.

I need cron to not execute the command if it is already running when the next minute arrives.

The line looks like this: * / 1 * * * * cmd

I tried with this * * * * * ID = job1 FREQ = 1m AFTER = job1 cmd

but without success.

Can I resolve with cron or block?

Answer 1

You can create a temporary file called inProgress (or something else) and save it in a standard place and use it to communicate with the next task if it should work or not.

, :

• inProgress
• ,
• Else, inProgress
• inProgress.

Answer 2

- , , Cron The Fat Controller, .

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http://www.4pmp.com/fatcontroller/