_IOMYBUF
iop->_flag |= _IOMYBUF;
iop->_flag |= _IOMYBUF;
if (iop->_flag & _IOMYBUF) {
if (iop->_flag & _IOMYBUF) {
if (iop->_flag & _IOMYBUF) {
if ((iop->_base != NULL) && (iop->_flag & _IOMYBUF))
iop->_flag &= ~(_IOMYBUF | _IONBF | _IOLBF);
iop->_flag |= _IOMYBUF;
int sflag = iop->_flag & _IOMYBUF;
iop->_flag &= ~(_IOMYBUF | _IONBF | _IOLBF);
iop->_flag |= _IOMYBUF;
iop->_flag |= _IOMYBUF;
iop->_flag |= _IOLBF|_IOMYBUF;
if (iop->_base != 0 && iop->_flag & _IOMYBUF)
iop->_flag &= ~(_IOMYBUF | _IONBF | _IOLBF);
iop->_flag |= _IOMYBUF;