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From: MLY.G.SHADES%MIT-OZ@MIT-MC.ARPA
Newsgroups: net.lang.c
Subject: Test for background process
Message-ID: <7984@brl-tgr.ARPA>
Date: Mon, 4-Feb-85 03:41:14 EST
Article-I.D.: brl-tgr.7984
Posted: Mon Feb  4 03:41:14 1985
Date-Received: Wed, 6-Feb-85 04:47:45 EST
Sender: news@brl-tgr.ARPA
Organization: Ballistic Research Lab
Lines: 7

actually the way to check for i/o redirection is to compare the stdin
/ stdout filenames to the stderr filename.  i forget the function call
at the moment (it's been a while) but the great thing about stderr is
that it is supposed to stay the same as the initial stdout throughout
a prog.

                          shades@mit-oz.arpa