I/O redirection of binary data

$Bill Luebkert dbe@wgn.net
Fri Sep 11 18:40:00 GMT 1998

Paul Wessel wrote:
> Hi gnu-win32 experts-
> POSIX recommends that one could use the b(inary) modifier
> in fopen for portability since the b has no effect on POSIX
> systems but may be needed in, say, MS-DOS.  How can
> I deal with this in redirection?  I often have a program do
> program > data
> and data is supposed to be binary but under gnu-win32 I noticed
> that the file size is incorrect (it is larger probably due to CR/LFs?)
> compared to POSIX systems.  This also causes problems when
> trying to read the file with anotherprogram < data.
> Are there any non-intrusive solutions?  WHen using stdout I am
> not using fopen so I cannot easily use the binary flag...

Maybe do isatty() and if not a tty, use binary, else use text mode.

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