TAB3
#ifdef TAB3
# define OFLAGS_TABS TAB3 /* POSIX specifies TAB3 */
#define tty__gettabs(td) ((((td)->c_oflag & TAB3) == TAB3) ? 0 : 1)
# ifndef TAB3
#define OXTABS TAB3 /* BSD name for TAB3 */
#ifndef TAB3
s.c_oflag |= (TAB3 | OPOST | ONLCR);
tmp_tc.c_oflag |= TAB3;
#ifdef TAB3
old_settings->c_oflag & (TAB3 | ONLCR | OCRNL | ONLRET)) {
old_settings->c_oflag &= (TAB3 | ONLCR | OCRNL | ONLRET);