8 #include <linux/signal.h>
9 #include <linux/sched/signal.h>
27  *	not in the foreground, send a SIGTTOU.  If the signal is blocked or
38 	if (current->signal->tty != tty)  in __tty_check_change()
79 	tty = p->signal->tty;  in proc_clear_tty()
80 	p->signal->tty = NULL;  in proc_clear_tty()
109 	if (current->signal->tty) {  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()
133 	if (current->signal->leader &&  in tty_open_proc_set_tty()
134 	    !current->signal->tty &&  in tty_open_proc_set_tty()
163 	tty = tty_kref_get(current->signal->tty);  in get_current_tty()
183  *	@exit_session: if non-zero, signal all foreground group processes
186  *	Optionally, signal all processes in the foreground process group.
202 			if (p->signal->tty == tty) {  in tty_signal_session_leader()
203 				p->signal->tty = NULL;  in tty_signal_session_leader()
208 			if (!p->signal->leader) {  in tty_signal_session_leader()
214 			put_pid(p->signal->tty_old_pgrp);  /* A noop */  in tty_signal_session_leader()
218 				p->signal->tty_old_pgrp = get_pid(tty->pgrp);  in tty_signal_session_leader()
254  *		  ->siglock is taken to protect ->signal/->sighand
256  *		    ->siglock is taken to protect ->signal/->sighand
262 	if (!current->signal->leader)  in disassociate_ctty()
283 		old_pgrp = current->signal->tty_old_pgrp;  in disassociate_ctty()
284 		current->signal->tty_old_pgrp = NULL;  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()
315 	put_pid(current->signal->tty_old_pgrp);  in disassociate_ctty()
316 	current->signal->tty_old_pgrp = NULL;  in disassociate_ctty()
319 	/* Now clear signal->tty under the lock */  in disassociate_ctty()
350  *		Takes ->siglock() when updating signal->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()
538 	if (tty == real_tty && current->signal->tty != real_tty)  in tiocgsid()
565 		if (current->signal->tty != tty)  in tty_jobctrl_ioctl()