Redirect Output in the Middle of a Program??

[Mike McNamara]

	The discussion concerned writing large programs that  "noticed" the
     user logged off, and changed their output device from the terminal to
     a file, automagicaly.

	I'd be more interested in a way I could type
     % make
     interesting lines from make....
     ^Z
     % bg > make.out

 	     Which, if you didn't catch my drift, allows me to stop a job, 
     and restart it with it's stdout redirected to a file.

      Any one done this?
-- 
 Michael Mc Namara                 
 ESL Incorporated                 
 ARPA: mac%esl at lll-lcc.ARPA