On Mon, Aug 27, 2007 at 10:33:21AM -0700, Jeff Zucker wrote:
> Tim Bunce wrote:
>
> On Sun, Aug 26, 2007 at 11:41:08PM +0200, Bart Lateur wrote:
> t/41prof_dump.............flock() unimplemented on this platform at
>
> Try the appended patch and let me know if it works for you.
>
> +my $HAS_FLOCK = do { local $@; eval { flock STDOUT, 0; 1 } };
>
> While that's the method I use in DBD::File, there appear to be some
> phantom problems with it. I think that you can get a true value
> for that but still not be able to call flock(). So I get (rare)
> reports of tests hanging when flock() is called even if it is only
> called when $HAS_FLOCK is true. If I recall correctly, from users
> with NFS.
With NFS and running the test in an NFS mounted filesystem, probably.
NFS implementations can suffer problems with lock daemons.
> I'm not sure if there is a good solution.
I've changed the code so the default can be overridden via an env var
and callers can force use of non-use of flock. That'll do for now.
Thanks Jeff.
Tim.
