You might find this tutorial useful: File Locking, particularly the responses by KM.

In my view Perl on SunOS/Solaris is behaving fairly rationally when it dies on an attempt to take a LOCK_SH on a file opened for write. Why would you want to allow others to take locks on a file that you are modifying?

In reply to Re: flock on differents OSes by virtualsue
in thread flock on differents OSes by philou

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