fcntl file locking and pthreads

From: Mikhail Kruk (meshko@cs.brandeis.edu)
Date: Sun May 04 2003 - 01:13:25 EST


Hi,
on 2.4 kernels fcntl-based file locking does not work with
clone-based threads as expected (by me): two threads of the same process
can acquire exclusive lock on a file at the same time.
flock()-based locks work as expected, i.e. only one thread can have an
exclusive lock at a time.
What would it take to make fcntl work as flock?

Please cc me, I'm not subscribed.
Thanks

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