S_ISATTY
if (__m_screen->_flags & S_ISATTY) {
if (__m_screen->_flags & S_ISATTY) {
if (__m_screen->_flags & S_ISATTY) {
if ((__m_screen->_flags & S_ISATTY)
__m_screen->_flags &= ~S_ISATTY;
__m_screen->_flags |= S_ISATTY;
__m_screen->_flags &= ~S_ISATTY;
__m_screen->_flags |= S_ISATTY;
if (!(__m_screen->_flags & S_ISATTY) ||