[Wellington-pm] perl -f check failed

[Jethro Carr]

On Wed, 2010-07-21 at 15:23 +1200, Grant McLean wrote:
> > Essentially the script creates a number of text files whilst running and
> > checks if any exist using -f - if they do, it knows to use a different
> > name for the new file.
> 
> That sounds like a classic race condition.  If you check whether the
> file exists before you create it then it's possible that another process
> might create it between the time your check returns false and when you
> create the file. 

thanks Grant,

Good thinking, but one I've already checked - no other script was
running at that stage. :-(

(The script uses a lock file to enforce a single instance which I've
confirmed by checking the logs for any evidence of a second process)

regards,
jethro

-- 
Jethro Carr
www.jethrocarr.com/index.php?cms=blog
www.amberdms.com
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