[CentOS] Triggering script from cron or web client

[Les Mikesell]

On 7/11/11 9:16 PM, Kenneth Porter wrote:
> --On Friday, July 08, 2011 8:23 PM -0400 Brian Mathis
> <brian.mathis+centos at 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?

You really need to make the script do its own locking so it doesn't matter if 
cron runs it or a dozen web users click the 'run now' buttons at once.

-- 
   Les Mikesell
    lesmikesell at gmail.com