Yes ... or the sixth and seventh commands could be these instead if the
sequence of messages in the spool file is not critical (and you are not
using csh ... at least not a csh where you can't use the append redirector
to create a not-yet-existent file).
%cat furu.mbox >> /var/mail/furu
%rm -f furu.mbox
On second thought, with both those ifs, just take Wesley's original if you
think there's any chance the edits will last seventeen minutes and four
seconds or longer.
I agree, that if you really need to spend seventeen minutes editing, you
really have a problem! Except in an environment like mine, where you get
fifteen interruptions whenever you try to do anything tricky.