Re: Singleton process

From: Ben Morrow (usenet_at_morrow.me.uk)
Date: 10/29/03 

Date: Wed, 29 Oct 2003 16:55:39 +0000 (UTC)

mjd@plover.com (Mark Jason Dominus) wrote:
> In article <bnm7vm$eel$2@wisteria.csv.warwick.ac.uk>,
> Ben Morrow <usenet@morrow.me.uk> wrote:
> >
> >tassilo.parseval@post.rwth-aachen.de wrote:
> >> Also sprach Roy Johnson:
> >>
> >> > I've got a program that I want to be the only instance of itself
> >> > running at any given time. What *should* I be doing, for maximum
> >> > reliability on both Unix and Windows?
> >>
> >What if the process is killed and leaves a stale lockfile around?
>
> Can I suggest the following delightful and foolproof solution to this
> problem?
>
> http://perl.plover.com/yak/flock/samples/slide006.html

Nice, as usual :).

The problem of Win32 failing to break locks when a process is killed
(and I believe sometimes even failing to break them across reboots) is
of course not a Perl problem.

Ben 

-- 
   Although few may originate a policy, we are all able to judge it.
                                             - Pericles of Athens, c.430 B.C.
  ben@morrow.me.uk