fileno             42 maint/gnulib/lib/binary-io.h #  undef fileno
fileno             43 maint/gnulib/lib/binary-io.h #  define fileno _fileno
fileno            391 maint/gnulib/lib/stdio.in.h #   undef fileno
fileno            392 maint/gnulib/lib/stdio.in.h #   define fileno _fileno