A question about ANSI C file handling

[Anders Thulin]

I understand that the ANSI draft standard of C requires binary files
to be opened in binary mode, using for instance:
 
  f = fopen(file, "rb");

Does anybody know if there is a way (in ANSI C) to determine whether
a file is binary or not?  Does fopen fail if a binary file isn't
opened as binary?

Thanks,

Anders Thulin, ContextVision AB, Teknikringen 1, S-583 30 Linkoping, SWEDEN
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