fseek() vs. fseeko()

[Sebastian Huber <sebastian dot huber at embedded-brains dot de>]

Hello,

the fseeko() is implemented as

int
_DEFUN(fseeko, (fp, offset, whence),
       register FILE *fp _AND
       _off_t offset     _AND
       int whence)
{
  /* for now we simply cast since off_t should be long */
  return _fseek_r (_REENT, fp, (long)offset, whence);
}

thus even if sizeof(off_t) > sizeof(long) we can only use the range of long in 
fseeko().  Is this intentional?  Open group says:

http://pubs.opengroup.org/onlinepubs/009696699/functions/fseek.html

"The fseeko() function shall be equivalent to the fseek() function except that 
the offset argument is of type off_t."

Does the demanded equivalence really intend to degenerated fseeko() to 
fseek(fp, (long) offset, whence)?

--
Sebastian Huber, embedded brains GmbH

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