Re: How to determine if a script instance is already running?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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!

-- 
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php


[Index of Archives]     [PHP Home]     [Apache Users]     [PHP on Windows]     [Kernel Newbies]     [PHP Install]     [PHP Classes]     [Pear]     [Postgresql]     [Postgresql PHP]     [PHP on Windows]     [PHP Database Programming]     [PHP SOAP]

  Powered by Linux