Re: Emulate(?) the crontab

[Jens Knoell <jens@surefoot.com>]

Hi Mario

On 01/09/2007 12:33 PM, Mário Gamito wrote:
> Hi,
>
> I have this blog agregator in http://www.planetgeek.org
>
> The agregator software must run a one line command every 15 minutes to 
> rebuild the index.html of the site.
>
> The command is
> #planet.py geek/fancy/config.ini
>
> I wonder if there could be written a script (bash, perl, python), that 
> *without crontab* could run the command I need.
Yes and no. You could - depending on the hosting solution - write a 
script that runs in an endless loop and does a sleep() and set it as a 
background process. The big issue there is that a server reboot will 
kill that process. There are sneaky ways around that, like for example 
checking if the process is running - each time a user hits your page, a 
script launches to see if the endless job is running. If not - restart it.

Alternatively if you have shell access you can run a timed process on a 
different machine which for example uses SSH to hop on to the host, runs 
the process and backs off. If you have a server or 24/7 machine at home 
for example that would work just fine.

Either solution would be reasonably feasible.

Jen
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