The documentation for System.Process.terminateProcess claims that under Un*x the SIGKILL signal is sent to the process, whereas the source uses SIGTERM. I would prefer if I could choose which signal to use. (The System.Posix interface cannot be used with ProcessHandles.) Furthermore the CVS log for base/cbits/runProcess.c states: getProcessExitCode(Unix): return some more useful values. If the process doesn't exist, return (Just ExitSuccess). This isn't ideal, but it's better than returning Nothing (which indicates the process is still running). This should be included in the documentation, or preferably a more detailed result should be returned. -- /NAD