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Mail Archives: djgpp/1998/03/07/01:46:53

From: Eric Gillespie <viking AT nospam DOT flying-brick DOT caverock DOT net DOT nz>
Newsgroups: comp.os.msdos.djgpp
Subject: Pipes and how to seek
Date: Sat, 7 Mar 1998 17:05:38 +1300
Organization: Cave Rock Internet subscriber
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Message-ID: <Pine.LNX.3.96.980307165315.19546A-100000@central.caverock.co.nz>
Reply-To: viking AT caverock DOT net DOT nz
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Hi all - have a wee problem that I can't find anything in the FAQ about.
I believe pipes under DJGPP are simulated by using temporary files in the
%TEMP% directory.  The problem I have is this - I wish to handle stdin with a
program of mine, and I sometimes cat the output towards my program through a
pipe.  Only thing is, hexdump runs out of bytes way before cat has finished.

I.E brick:~$ cat hexdump.o | hexdump     (hexdump.o is about 27k)

hexdump displays about 3.5k of file, and I can't fseek within the pipe - the
program locks up when I try to do this, though I can display all bytes from
the beginning to the end of what hexdump has (all 3.5k of them...)

I wish this was a little clearer, but I'd have to post about 650-700 lines of
code to show you what I meant...how can I get a pipe to display the ENTIRE
contents of what I pass to it? Is it something to do with cat, or with my
programming, or just the limitations of the OpenDOS environment?

Also, does anyone know who I could write to about sorting out bugs with the
LONGNAME tsr (supporting WIN'95-like long names)?  I'm having strange
reactions in some directories but not others...

I'll let that do for the moment, and will keep on the ball at this end
watching for replies, though if you want to email me, it will be faster.

Cheers for the moment,
The Viking, root of the Flying Brick...


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