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C/C++ Source or Header  |  1993-10-05  |  175 b   |  13 lines
  1. #include "libio.h"
  2. #include "stdio.h"
  3.  
  4. int
  5. fileno(fp)
  6.      _IO_FILE* fp;
  7. {
  8.   COERCE_FILE(fp);
  9.   if (!(fp->_flags & _IO_IS_FILEBUF))
  10.     return EOF;
  11.   return _IO_fileno(fp);
  12. }
  13.