Presumably it's the difference between a text-mode filehandle and a binary-mode filehandle. So (untested, because I'm baking a cake) printing to fdopen(1, "wb"

Presumably it's the difference between a text-mode filehandle and a binary-mode filehandle. So (untested, because I'm baking a cake) printing to fdopen(1, "wb") should just send bytes, allowing printf etc to work?