( stream->status & ( _PDCLIB_FWRITE | _PDCLIB_FAPPEND | _PDCLIB_ERRORFLAG | _PDCLIB_WIDESTREAM | _PDCLIB_EOFFLAG ) ) ||
! ( stream->status & ( _PDCLIB_FREAD | _PDCLIB_FRW ) ) )
{
- _PDCLIB_errno = _PDCLIB_EIO;
+ /* Function called on illegal (e.g. output) stream.
+ See comments on implementation-defined errno values in
+ <_PDCLIB_config.h>.
+ */
+ _PDCLIB_errno = _PDCLIB_ERROR;
stream->status |= _PDCLIB_ERRORFLAG;
return EOF;
}