From:	Anderson <ealmeida AT sigmanet DOT com DOT br>
Newsgroups:	comp.os.msdos.djgpp
Subject:	How to switch popen read/write modes?
Date:	Tue, 28 Nov 2000 01:26:55 -0200
Organization:	Pennsylvania College of Technology
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Message-ID:	<3A2325FF.A38B511D@sigmanet.com.br>
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

Hi guys!

I'm trying out with popen function. It says (at help file) that it can
open a program for reading and writing 
handle = popen ("program", "rb+")
I've write a test, but it happens that, if I start with writing
property, I can't read the output, and vice-versa. The help mentions
that I must call rewind, fflush or fseek before switching, but *how* can
I switch? And, if a rewind, I will not loose the output from my first
writing?
Oh, before someone tell me this question woulb be better aswered at a
unix group, I'm using rhide+djgpp (dos), and probably (imho) it works
diferently. (I've also checked old messages posted in this group).

Thanks in advance.
Anderson.

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