On 02/13/2017 12:20 PM, Eric Blake wrote:
> undossify_input causes more problems than it
> solves.  We should trust fopen("r") to do the right thing, rather than
> reinventing it ourselves.

Yes, that makes sense. Attached is a proposed patch to implement this. 
It assumes the patch you already submitted for Bug#25707.

This patch keeps the -U option, for MS-Windows users who want to 
override fopen "-r"'s choice of binary vs text I/O. Perhaps that's too 
conservative? It would be easy to turn -U into a no-op too.