Path: utzoo!attcan!uunet!samsung!xylogics!bu.edu!dartvax!eleazar.dartmouth.edu!emf
From: emf@eleazar.dartmouth.edu (Eric Friets)
Newsgroups: comp.lang.c
Subject: redirecting output
Message-ID: <22931@dartvax.Dartmouth.EDU>
Date: 27 Jun 90 19:50:17 GMT
Sender: news@dartvax.Dartmouth.EDU
Distribution: na
Organization: Dartmouth College, Hanover, NH
Lines: 22


I need to redirect output in the middle of a program
from the standard output to a file.  The use of
fprintf is ruled out because I do not have the
source of the functions whose output I want.

Options that are not acceptable:
1. redirect output of the entire program, as in
	prog > file
2. have the rest of the program write to stderr, and 
then redirect the entire program, as above
3. write the necessary data to a file, and have a
smaller program that redirects to a file

What is really needed is a way to change the pointer
to stdout to a file pointer returned by fopen().  Any
suggestions would be appreciated.  I will summarize and
post responses that are mailed to me.

Eric Friets
emf@eleazar.dartmouth.edu
.