Frequent job scheduling like cron

[Michael Hipp]

Net Llama! wrote:
> seriously, you can have your script create some kind of lock file, and 
> then whenever it runs, check for the existence of the lock file before 
> proceeding.  if it doesn't find one, then it should create a new lock 
> file, do its thing, and when completed, delete its lock file.

Good thought and fairly easy to implement. Probably need to do some 
timestamp checking to avoid the "permanent" lock file syndrome. Thanks.

Michael