Posted by Matt on 08/02/05 17:44

Perhaps "svscan" and its associated "daemontools" programs could be
used to monitor the script instead of relying on cron.

http://cr.yp.to/daemontools.html

On 8/2/05, André Medeiros <andre.caum@gmail.com> wrote:
> On Tue, 2005-08-02 at 15:09 +0100, Stut wrote:
> > André Medeiros wrote:
> > > Do like some services do:
> > >
> > > 1) Check if script.pid exists
> > > 2) If it doesn't
> > > 2.1) Write the process's PID onto the file
> > > (http://pt.php.net/manual/en/function.getmypid.php)
> > > 3) If it does
> > > 3.1) Die gracefully :)
> >
> > Personally I'd extend that slightly to have the process touch the PID
> > file every so often and to check that it's been touched recently when it
> > starts up. Alternatively use the ps shell command to check that a
> > process with that PID is still running, but that tends to be less reliable.
> >
> > If the process does decide to continue in spite of the PID file existing
> > it should issue a a shell kill command to kill that PID in case it's
> > hung or a zombie.
> >
> > -Stut
>
> Excelent point!
>
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