Re: [MiNT] stdio write problem in mintlib

[Vincent Rivière <vincent.riviere@freesbee.fr>]

My latest patch made the MiNTLib act as Cygwin regarding to the mode:

> - default mode (text or binary, according to UNIXMODE) must be only used 
> for regular files
> - binmode must be used in all the other cases (including pipes)

This is good because arbitrary binary data can be used in pipes (like in 
 UNIX), and regular files are always written in the mode requested by 
the user (according to UNIXMODE). Furthermore, software that is know to 
work on Cygwin (regarding to textmode in stdio) will work as well with 
the MiNTLib.

These rules work well as long as everyone respects it.
Unfortunately, this is not the case for existing MiNT software.
- Plain TOS programs always use stdout in textmode (including pipes)
- Current MiNTLib programs always use stdout in default mode (including 
pipes)

So if an old program is piped into a newly patched MiNTLib proram, the 
new program will not work correctly, because it will find trailing CRs 
in stdin and will not discard them.

In order to be compatible with the existing programs, the best solution 
would probably to not patch anything. In that case the pipes use default 
mode, so it is impossible to use real binary data in pipes when UNIXMODE 
 is not set to b (is it a real problem ?). And UNIX software will have 
to be patched explicitly for MiNT in order to be prepared to find CR in 
pipes (like bash with the ` ` syntax).

Any comment is welcome.

--
Vincent Rivière