18 	return (sigismember(&current->blocked, sig) ||  in is_ignored()
19 		current->sighand->action[sig-1].sa.sa_handler == SIG_IGN);  in is_ignored()
39 	if (current->signal->tty != tty)  in __tty_check_change()
43 	pgrp = task_pgrp(current);  in __tty_check_change()
109 	tty->ctrl.pgrp = get_pid(task_pgrp(current));  in __proc_set_tty()
110 	tty->ctrl.session = get_pid(task_session(current));  in __proc_set_tty()
112 	if (current->signal->tty) {  in __proc_set_tty()
113 		tty_debug(tty, "current tty %s not NULL!!\n",  in __proc_set_tty()
114 			  current->signal->tty->name);  in __proc_set_tty()
115 		tty_kref_put(current->signal->tty);  in __proc_set_tty()
117 	put_pid(current->signal->tty_old_pgrp);  in __proc_set_tty()
118 	current->signal->tty = tty_kref_get(tty);  in __proc_set_tty()
119 	current->signal->tty_old_pgrp = NULL;  in __proc_set_tty()
124 	spin_lock_irq(&current->sighand->siglock);  in proc_set_tty()
126 	spin_unlock_irq(&current->sighand->siglock);  in proc_set_tty()
135 	spin_lock_irq(&current->sighand->siglock);  in tty_open_proc_set_tty()
136 	if (current->signal->leader &&  in tty_open_proc_set_tty()
137 	    !current->signal->tty &&  in tty_open_proc_set_tty()
156 	spin_unlock_irq(&current->sighand->siglock);  in tty_open_proc_set_tty()
165 	spin_lock_irqsave(&current->sighand->siglock, flags);  in get_current_tty()
166 	tty = tty_kref_get(current->signal->tty);  in get_current_tty()
167 	spin_unlock_irqrestore(&current->sighand->siglock, flags);  in get_current_tty()
269 	if (!current->signal->leader)  in disassociate_ctty()
291 		spin_lock_irq(&current->sighand->siglock);  in disassociate_ctty()
292 		old_pgrp = current->signal->tty_old_pgrp;  in disassociate_ctty()
293 		current->signal->tty_old_pgrp = NULL;  in disassociate_ctty()
294 		spin_unlock_irq(&current->sighand->siglock);  in disassociate_ctty()
319 	 * current->signal->tty_old_pgrp in a race condition, and  in disassociate_ctty()
320 	 * cause pid memleak. Release current->signal->tty_old_pgrp  in disassociate_ctty()
323 	spin_lock_irq(&current->sighand->siglock);  in disassociate_ctty()
324 	put_pid(current->signal->tty_old_pgrp);  in disassociate_ctty()
325 	current->signal->tty_old_pgrp = NULL;  in disassociate_ctty()
326 	spin_unlock_irq(&current->sighand->siglock);  in disassociate_ctty()
330 	session_clear_tty(task_session(current));  in disassociate_ctty()
336  *	no_tty	- Ensure the current process does not have a controlling tty
345 	struct task_struct *tsk = current;  in no_tty()
372 	if (current->signal->leader &&  in tiocsctty()
373 			task_session(current) == tty->ctrl.session)  in tiocsctty()
380 	if (!current->signal->leader || current->signal->tty) {  in tiocsctty()
464  *	Locking: none. Reference to current->signal->tty is safe.
474 	if (tty == real_tty && current->signal->tty != real_tty)  in tiocgpgrp()
510 	if (!current->signal->tty ||  in tiocspgrp()
511 	    (current->signal->tty != real_tty) ||  in tiocspgrp()
512 	    (real_tty->ctrl.session != task_session(current))) {  in tiocspgrp()
522 	if (session_of_pgrp(pgrp) != task_session(current))  in tiocspgrp()
552 	if (tty == real_tty && current->signal->tty != real_tty)  in tiocgsid()
579 		if (current->signal->tty != tty)  in tty_jobctrl_ioctl()