tty/vt/vt_ioctl.c

46 	const struct vc_data *vc = vc_cons[i].d;
49 	 * console_lock must be held to prevent the vc from being deallocated
54 	return vc && kref_read(&vc->port.kref) > 1;
75  * and the vc start at /dev/ttyX, X >= 1. We maintain that here, so we will
86 static void complete_change_console(struct vc_data *vc);
252 static int vt_kdsetmode(struct vc_data *vc, unsigned long mode)
267 	if (vc->vc_mode == mode)
270 	vc->vc_mode = mode;
271 	if (vc->vc_num != fg_console)
286 	struct vc_data *vc = tty->driver_data;
288 	unsigned int console = vc->vc_num;
381 		ret = vt_kdsetmode(vc, arg);
386 		return put_user(vc->vc_mode, (int __user *)arg);
474 		ret = con_font_op(vc, &op);
490 		bool perm, struct vc_data *vc)
500 		return con_set_unimap(vc, tmp.entry_ct, tmp.entries);
502 		if (!perm && fg_console != vc->vc_num)
504 		return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct),
510 static int vt_io_ioctl(struct vc_data *vc, unsigned int cmd, void __user *up,
541 		con_clear_unimap(vc);
546 		return do_unimap_ioctl(cmd, up, perm, vc);
555 static int vt_reldisp(struct vc_data *vc, unsigned int swtch)
559 	if (vc->vt_mode.mode != VT_PROCESS)
563 	if (vc->vt_newvt < 0) {
571 		vc->vt_newvt = -1;
576 	newvt = vc->vt_newvt;
577 	vc->vt_newvt = -1;
632 	struct vc_data *vc = NULL;
639 		vc = vc_deallocate(vc_num);
642 	if (vc && vc_num >= MIN_NR_CONSOLES)
643 		tty_port_put(&vc->port);
651 	struct vc_data *vc[MAX_NR_CONSOLES];
657 			vc[i] = vc_deallocate(i);
659 			vc[i] = NULL;
663 		if (vc[i] && i >= MIN_NR_CONSOLES)
664 			tty_port_put(&vc[i]->port);
668 static int vt_resizex(struct vc_data *vc, struct vt_consize __user *cs)
678 		v.v_vlin = vc->vc_scan_lines;
738 	struct vc_data *vc = tty->driver_data;
755 	ret = vt_io_ioctl(vc, cmd, up, perm);
774 		vc->vt_mode = tmp;
776 		vc->vt_mode.frsig = 0;
777 		put_pid(vc->vt_pid);
778 		vc->vt_pid = get_pid(task_pid(current));
780 		vc->vt_newvt = -1;
791 		memcpy(&tmp, &vc->vt_mode, sizeof(struct vt_mode));
887 		ret = vt_reldisp(vc, arg);
911 		struct vc_data *vc;
922 			vc = vc_cons[i].d;
924 			if (vc) {
937 		return vt_resizex(vc, up);
950 		return put_user(vc->vc_hi_font_mask,
961 void reset_vc(struct vc_data *vc)
963 	vc->vc_mode = KD_TEXT;
964 	vt_reset_unicode(vc->vc_num);
965 	vc->vt_mode.mode = VT_AUTO;
966 	vc->vt_mode.waitv = 0;
967 	vc->vt_mode.relsig = 0;
968 	vc->vt_mode.acqsig = 0;
969 	vc->vt_mode.frsig = 0;
970 	put_pid(vc->vt_pid);
971 	vc->vt_pid = NULL;
972 	vc->vt_newvt = -1;
973 	reset_palette(vc);
978 	struct vc *vc_con =
979 		container_of(work, struct vc, SAK_work);
980 	struct vc_data *vc;
984 	vc = vc_con->d;
985 	if (vc) {
987 		tty = vc->port.tty;
994 		reset_vc(vc);
1011 			 int perm, struct console_font_op *op, struct vc_data *vc)
1020 	i = con_font_op(vc, op);
1036 			 int perm, struct vc_data *vc)
1048 		return con_set_unimap(vc, tmp.entry_ct, tmp_entries);
1050 		if (!perm && fg_console != vc->vc_num)
1052 		return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp_entries);
1060 	struct vc_data *vc = tty->driver_data;
1079 		return compat_kdfontop_ioctl(up, perm, &op, vc);
1083 		return compat_unimap_ioctl(cmd, up, perm, vc);
1127 static void complete_change_console(struct vc_data *vc)
1140 	switch_screen(vc);
1152 	if (old_vc_mode != vc->vc_mode) {
1153 		if (vc->vc_mode == KD_TEXT)
1164 	if (vc->vt_mode.mode == VT_PROCESS) {
1170 		if (kill_pid(vc->vt_pid, vc->vt_mode.acqsig, 1) != 0) {
1180 			reset_vc(vc);
1182 			if (old_vc_mode != vc->vc_mode) {
1183 				if (vc->vc_mode == KD_TEXT)
1194 	vt_event_post(VT_EVENT_SWITCH, old, vc->vc_num);
1203 	struct vc_data *vc;
1223 	vc = vc_cons[fg_console].d;
1224 	if (vc->vt_mode.mode == VT_PROCESS) {
1233 		vc->vt_newvt = new_vc->vc_num;
1234 		if (kill_pid(vc->vt_pid, vc->vt_mode.relsig, 1) == 0) {
1252 		reset_vc(vc);
1262 	if (vc->vc_mode == KD_GRAPHICS)