18 	return (sigismember(&current->blocked, sig) ||  in is_ignored()
19 		current->sighand->action[sig-1].sa.sa_handler == SIG_IGN);  in is_ignored()
38 	if (current->signal->tty != tty)  in __tty_check_change()
42 	pgrp = task_pgrp(current);  in __tty_check_change()
106 	tty->pgrp = get_pid(task_pgrp(current));  in __proc_set_tty()
107 	tty->session = get_pid(task_session(current));  in __proc_set_tty()
109 	if (current->signal->tty) {  in __proc_set_tty()
110 		tty_debug(tty, "current tty %s not NULL!!\n",  in __proc_set_tty()
111 			  current->signal->tty->name);  in __proc_set_tty()
112 		tty_kref_put(current->signal->tty);  in __proc_set_tty()
114 	put_pid(current->signal->tty_old_pgrp);  in __proc_set_tty()
115 	current->signal->tty = tty_kref_get(tty);  in __proc_set_tty()
116 	current->signal->tty_old_pgrp = NULL;  in __proc_set_tty()
121 	spin_lock_irq(&current->sighand->siglock);  in proc_set_tty()
123 	spin_unlock_irq(&current->sighand->siglock);  in proc_set_tty()
132 	spin_lock_irq(&current->sighand->siglock);  in tty_open_proc_set_tty()
133 	if (current->signal->leader &&  in tty_open_proc_set_tty()
134 	    !current->signal->tty &&  in tty_open_proc_set_tty()
153 	spin_unlock_irq(&current->sighand->siglock);  in tty_open_proc_set_tty()
162 	spin_lock_irqsave(&current->sighand->siglock, flags);  in get_current_tty()
163 	tty = tty_kref_get(current->signal->tty);  in get_current_tty()
164 	spin_unlock_irqrestore(&current->sighand->siglock, flags);  in get_current_tty()
262 	if (!current->signal->leader)  in disassociate_ctty()
282 		spin_lock_irq(&current->sighand->siglock);  in disassociate_ctty()
283 		old_pgrp = current->signal->tty_old_pgrp;  in disassociate_ctty()
284 		current->signal->tty_old_pgrp = NULL;  in disassociate_ctty()
285 		spin_unlock_irq(&current->sighand->siglock);  in disassociate_ctty()
310 	 * current->signal->tty_old_pgrp in a race condition, and  in disassociate_ctty()
311 	 * cause pid memleak. Release current->signal->tty_old_pgrp  in disassociate_ctty()
314 	spin_lock_irq(&current->sighand->siglock);  in disassociate_ctty()
315 	put_pid(current->signal->tty_old_pgrp);  in disassociate_ctty()
316 	current->signal->tty_old_pgrp = NULL;  in disassociate_ctty()
317 	spin_unlock_irq(&current->sighand->siglock);  in disassociate_ctty()
321 	session_clear_tty(task_session(current));  in disassociate_ctty()
327  *	no_tty	- Ensure the current process does not have a controlling tty
334 	struct task_struct *tsk = current;  in no_tty()
359 	if (current->signal->leader && (task_session(current) == tty->session))  in tiocsctty()
366 	if (!current->signal->leader || current->signal->tty) {  in tiocsctty()
450  *	Locking: none. Reference to current->signal->tty is safe.
460 	if (tty == real_tty && current->signal->tty != real_tty)  in tiocgpgrp()
496 	if (!current->signal->tty ||  in tiocspgrp()
497 	    (current->signal->tty != real_tty) ||  in tiocspgrp()
498 	    (real_tty->session != task_session(current))) {  in tiocspgrp()
508 	if (session_of_pgrp(pgrp) != task_session(current))  in tiocspgrp()
538 	if (tty == real_tty && current->signal->tty != real_tty)  in tiocgsid()
565 		if (current->signal->tty != tty)  in tty_jobctrl_ioctl()