TOTTY
pca.flags = TOTTY;
flags |= TOTTY;
pca.flags = TOTTY;
pca.flags = kprintf_logging & ~TOTTY;
pca.flags = kprintf_logging & ~TOTTY;
if ((flags & TOTTY) && tputchar(c, tp) < 0)
ap->flags &= ~TOTTY;
(((struct putchar_arg *)arg)->flags & TOTTY) == 0);