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exit-handler added by andyjpb on Mon Sep 9 16:21:25 2013
(let ((original-exit (exit-handler)))
(exit-handler (lambda (#!optional (exit-code 0))
(printf "Preparing to exit...\n" exit-code)
(for-each (lambda (pid)
(printf "Sending signal/term to ~A\n" pid)
(process-signal pid signal/term)) (children))
(original-exit exit-code))))