On Wed, 2007-10-03 at 13:34 -0700, Mark Wagner wrote: > I've got a Perl program that is run once an hour as a cron job. > Normally it finishes its task in about ten minutes, but occasionally > it takes more than an hour to complete. When this happens, a second > copy is started, the two copies step on each others' toes, and both > crash. > > I'm looking for the second copy to know that another copy is running > and exit after logging a message to that effect. Any method needs to > work properly if the first copy crashes rather than exiting cleanly.
http://search.cpan.org/~elizabeth/Sys-RunAlone-0.07/lib/Sys/RunAlone.pm Another design for this sort of thing is a mutex. There are a few modules for this. This means you can lock out smaller parts of code and keep two copies running concurrently doing different work. -- Ken Foskey FOSS developer -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
