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Martin,

This looks good.  Can I commit it?

Sjoerd,

> Does the patch make sense on other Cygwin
> installations than my own?

Yes, see below for the details.

My WAG is that you are using text mode mounts. Is
this correct? In my testing, I could only reproduce
this problem under text mode mounts -- never under
binary mode mounts.  Nevertheless, this patch
should be applied to guarantee proper behavior
regardless of the user's mount table.

Thanks for tracking down this issue and providing
a patch to fix it.

I wonder if there are any other binary vs. text
mode issues lurking...

BTW, the man page states the following:

-u     Force  stdin,  stdout  and  stderr  to  be
       totally unbuffered.

However, after reading the code, it is clear that
the "-u" option does more... :,)