From:	dj AT delorie DOT com (DJ Delorie)
Subject:	Re: using cat on binary files (CTRL-Z trauma)
29 Oct 1996 06:16:04 -0800 :
Sender:	daemon AT cygnus DOT com
Approved:	cygnus DOT gnu-win32 AT cygnus DOT com
Distribution:	cygnus
Message-ID:	<199610291348.IAA08031.cygnus.gnu-win32@delorie.com>
Original-To:	kerr AT wizard DOT net
Original-CC:	noer AT cygnus DOT com, gnu-win32 AT cygnus DOT com
In-reply-to:	<199610290352.WAA05725@wizard.wizard.net> (kerr@wizard.net)
Original-Sender:	owner-gnu-win32 AT cygnus DOT com

> Many UNIX programs don't specify WHAT???  O_BINARY is strictly a 
> MS-DOS artifact.  Well, maybe Mac's have it, I don't know.  There 
> _is_ no O_BINARY flag in UNIX, so I would hazard to guess that there 
> are _very_ few UNIX programs that use it.

It's easy to add to the beginning of a unix program:

	#ifndef O_BINARY
	#define O_BINARY 0
	#endif

> I would suggest that for maximum compatibility files should default 
> to binary mode.

We've had this discussion on the djgpp group many times.  For some
programs, it makes sense, but we almost always end up adding a
command-line option to change the default.

If cat were binary, and you cat'd two files with ^Z in them, when you
read the file with another program, it stops at the first ^Z and you
don't see the second file at all.
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