

          wait proclist
               Waits for an any of the immediate child processes
               specified in the list proclist to terminate or a signal
               to be received.  Wait returns a list of three elements:
               The first element is process id of the terminating
               process. If the process exited normally, the second
               element is `EXIT', followed by the error code.  If the
               process terminated because of a signal, the second
               element is `SIG', followed by the signal name.  If the
               process is currently stopped, the second element is
               `STOP', followed by the signal name.
