TF_TTY_INTR
&& (sigtraps[WTERMSIG(status)].flags & TF_TTY_INTR))
sigtraps[SIGINT].flags |= TF_DFL_INTR | TF_TTY_INTR;
sigtraps[SIGQUIT].flags |= TF_DFL_INTR | TF_TTY_INTR;