Triggering script from cron or web client
On Mon, Jul 11, 2011 at 10:16 PM, Kenneth Porter <shiva@sewingwitch.com> wrote:
> --On Friday, July 08, 2011 8:23 PM -0400 Brian Mathis
> <brian.mathis+centos@betteradmin.com> wrote:
>
>> If you don't want to wait a full minute you could use
>> 'incron' to monitor the temp directory and kick the update right away.
>> *Seems better than having something in a loop constantly checking.
>
> incron sounds promising. I could use the regular cron to push a signal (ie.
> touch a file) at the regular interval, whereupon incron launches the
> existing script, and the webscript can touch the signal file when I need
> the script run right away. Will incron not run the script again if it's
> already running? Will it queue the file event until the handler exits?
No, incron will not queue events or wait for the other one to finish.
Your script should take care of this.
One thing to watch out for is if the script is running and you use a
lockfile to exit from a 2nd one running, the original script won't get
the message about the 2nd file. Maybe that matters for this
application, maybe not.
-☙ Brian Mathis ❧-
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