10/10   Is there any quick "script starter" that will daemonize a process
        and return its PID?  I'm looking for something like
        % pid=`start foo [args...]`
                (foo starts running in the background)
        % kill -9 $pid
        \_ foo [args...] & pid=$!
        \_ foo [args...] & pid=$!     # sh
        \_ foo [args...] & set pid=$! # csh