In case you haven't done a super-search for "flock", you
can check
this thread, which has relevant info in
some of the later replies, as well as a link to a useful
article from the Feb.2002 Perl Journal (Issue #23).
In short, flock is not available on Windows 9x systems, but
is available on NT, XP, 2000. However, the TPJ article
contains some code that you can use to create semaphore
files, which can serve to accomplish the same thing as
flock.
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