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How do you do something akin to a sig alarm in a multi-threaded perl app?

I have an existing perl app that does something similar to a web crawler. It's multi-threaded and uses LWP::UserAgent to pull web pages. Sometimes the connection times out, and I'd like to make that timeout shorter. The timeout value in LWP::UserAgent doesn't seem to do anything in at least one case. This could be because it's actually chasing redirects or something like that. I personally don't care enough to chase down infinite redirects (or whatever it actually is that's taking so long). If this weren't multi-threaded, I'd do sig alarm. But it is multi-threaded!

And now, even more than the practical answer to my problem, I'd like to know how you do a timeout/sig alarm like behaviour in multi-threaded perl?

Thanks!
--Pileofrogs

In reply to Thread Killlin' by pileofrogs

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