At least on the server-side, there's a conflict between flock()/BSD, which perl uses, and flock()/POSIX for which I really couldn't find a decent solution for but to workaround it by using LockFile::Simple. It's not based on flock() or lockf() and can be customized.

In reply to Re: Exclusive locks on CentOS 5.5 by Khen1950fx
in thread Exclusive locks on CentOS 5.5 by RL

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