bug#6657: mkstemp on cygwin creates binary files

[Paolo Bonzini]

On 07/19/2010 03:28 PM, Eric Blake wrote:
> By the way, I don't see your patch for using mkostemp on cygwin in
> git://git.sv.gnu.org/sed.git; am I missing something, or is that not the
> latest git repository for sed?

I wanted to make sure you liked it before pushing. :)  I'll now push it.

I also experimented with forcing "wt" or "wb" depending on the presence 
or absence of --binary, but I convinced myself that at least using "wt" 
is wrong.

For now, I won't change the behavior of building the file in /tmp. 
While this may make rename not atomic, it can be "corrected" anyway by 
setting TMPDIR=. in the environment.  By comparison, "perl -i" is 
implemented using unlink+open which is not atomic so it's unlikely that 
anyone is relying on atomicity (and also wastes quota like TMPDIR=. 
would do).

Paolo