xref: /openbsd/usr.bin/tmux/server-client.c (revision 3bef86f7)
1 /* $OpenBSD: server-client.c,v 1.404 2024/01/16 13:09:11 claudio Exp $ */
2 
3 /*
4  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #include <sys/types.h>
20 #include <sys/ioctl.h>
21 #include <sys/uio.h>
22 
23 #include <errno.h>
24 #include <event.h>
25 #include <fcntl.h>
26 #include <imsg.h>
27 #include <paths.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <time.h>
31 #include <unistd.h>
32 #include <vis.h>
33 
34 #include "tmux.h"
35 
36 static void	server_client_free(int, short, void *);
37 static void	server_client_check_pane_resize(struct window_pane *);
38 static void	server_client_check_pane_buffer(struct window_pane *);
39 static void	server_client_check_window_resize(struct window *);
40 static key_code	server_client_check_mouse(struct client *, struct key_event *);
41 static void	server_client_repeat_timer(int, short, void *);
42 static void	server_client_click_timer(int, short, void *);
43 static void	server_client_check_exit(struct client *);
44 static void	server_client_check_redraw(struct client *);
45 static void	server_client_check_modes(struct client *);
46 static void	server_client_set_title(struct client *);
47 static void	server_client_set_path(struct client *);
48 static void	server_client_reset_state(struct client *);
49 static int 	server_client_is_bracket_pasting(struct client *, key_code);
50 static int	server_client_assume_paste(struct session *);
51 static void	server_client_update_latest(struct client *);
52 
53 static void	server_client_dispatch(struct imsg *, void *);
54 static void	server_client_dispatch_command(struct client *, struct imsg *);
55 static void	server_client_dispatch_identify(struct client *, struct imsg *);
56 static void	server_client_dispatch_shell(struct client *);
57 
58 /* Compare client windows. */
59 static int
60 server_client_window_cmp(struct client_window *cw1,
61     struct client_window *cw2)
62 {
63 	if (cw1->window < cw2->window)
64 		return (-1);
65 	if (cw1->window > cw2->window)
66 		return (1);
67 	return (0);
68 }
69 RB_GENERATE(client_windows, client_window, entry, server_client_window_cmp);
70 
71 /* Number of attached clients. */
72 u_int
73 server_client_how_many(void)
74 {
75 	struct client  	*c;
76 	u_int		 n;
77 
78 	n = 0;
79 	TAILQ_FOREACH(c, &clients, entry) {
80 		if (c->session != NULL && (~c->flags & CLIENT_UNATTACHEDFLAGS))
81 			n++;
82 	}
83 	return (n);
84 }
85 
86 /* Overlay timer callback. */
87 static void
88 server_client_overlay_timer(__unused int fd, __unused short events, void *data)
89 {
90 	server_client_clear_overlay(data);
91 }
92 
93 /* Set an overlay on client. */
94 void
95 server_client_set_overlay(struct client *c, u_int delay,
96     overlay_check_cb checkcb, overlay_mode_cb modecb,
97     overlay_draw_cb drawcb, overlay_key_cb keycb, overlay_free_cb freecb,
98     overlay_resize_cb resizecb, void *data)
99 {
100 	struct timeval	tv;
101 
102 	if (c->overlay_draw != NULL)
103 		server_client_clear_overlay(c);
104 
105 	tv.tv_sec = delay / 1000;
106 	tv.tv_usec = (delay % 1000) * 1000L;
107 
108 	if (event_initialized(&c->overlay_timer))
109 		evtimer_del(&c->overlay_timer);
110 	evtimer_set(&c->overlay_timer, server_client_overlay_timer, c);
111 	if (delay != 0)
112 		evtimer_add(&c->overlay_timer, &tv);
113 
114 	c->overlay_check = checkcb;
115 	c->overlay_mode = modecb;
116 	c->overlay_draw = drawcb;
117 	c->overlay_key = keycb;
118 	c->overlay_free = freecb;
119 	c->overlay_resize = resizecb;
120 	c->overlay_data = data;
121 
122 	if (c->overlay_check == NULL)
123 		c->tty.flags |= TTY_FREEZE;
124 	if (c->overlay_mode == NULL)
125 		c->tty.flags |= TTY_NOCURSOR;
126 	server_redraw_client(c);
127 }
128 
129 /* Clear overlay mode on client. */
130 void
131 server_client_clear_overlay(struct client *c)
132 {
133 	if (c->overlay_draw == NULL)
134 		return;
135 
136 	if (event_initialized(&c->overlay_timer))
137 		evtimer_del(&c->overlay_timer);
138 
139 	if (c->overlay_free != NULL)
140 		c->overlay_free(c, c->overlay_data);
141 
142 	c->overlay_check = NULL;
143 	c->overlay_mode = NULL;
144 	c->overlay_draw = NULL;
145 	c->overlay_key = NULL;
146 	c->overlay_free = NULL;
147 	c->overlay_data = NULL;
148 
149 	c->tty.flags &= ~(TTY_FREEZE|TTY_NOCURSOR);
150 	server_redraw_client(c);
151 }
152 
153 /*
154  * Given overlay position and dimensions, return parts of the input range which
155  * are visible.
156  */
157 void
158 server_client_overlay_range(u_int x, u_int y, u_int sx, u_int sy, u_int px,
159     u_int py, u_int nx, struct overlay_ranges *r)
160 {
161 	u_int	ox, onx;
162 
163 	/* Return up to 2 ranges. */
164 	r->px[2] = 0;
165 	r->nx[2] = 0;
166 
167 	/* Trivial case of no overlap in the y direction. */
168 	if (py < y || py > y + sy - 1) {
169 		r->px[0] = px;
170 		r->nx[0] = nx;
171 		r->px[1] = 0;
172 		r->nx[1] = 0;
173 		return;
174 	}
175 
176 	/* Visible bit to the left of the popup. */
177 	if (px < x) {
178 		r->px[0] = px;
179 		r->nx[0] = x - px;
180 		if (r->nx[0] > nx)
181 			r->nx[0] = nx;
182 	} else {
183 		r->px[0] = 0;
184 		r->nx[0] = 0;
185 	}
186 
187 	/* Visible bit to the right of the popup. */
188 	ox = x + sx;
189 	if (px > ox)
190 		ox = px;
191 	onx = px + nx;
192 	if (onx > ox) {
193 		r->px[1] = ox;
194 		r->nx[1] = onx - ox;
195 	} else {
196 		r->px[1] = 0;
197 		r->nx[1] = 0;
198 	}
199 }
200 
201 /* Check if this client is inside this server. */
202 int
203 server_client_check_nested(struct client *c)
204 {
205 	struct environ_entry	*envent;
206 	struct window_pane	*wp;
207 
208 	envent = environ_find(c->environ, "TMUX");
209 	if (envent == NULL || *envent->value == '\0')
210 		return (0);
211 
212 	RB_FOREACH(wp, window_pane_tree, &all_window_panes) {
213 		if (strcmp(wp->tty, c->ttyname) == 0)
214 			return (1);
215 	}
216 	return (0);
217 }
218 
219 /* Set client key table. */
220 void
221 server_client_set_key_table(struct client *c, const char *name)
222 {
223 	if (name == NULL)
224 		name = server_client_get_key_table(c);
225 
226 	key_bindings_unref_table(c->keytable);
227 	c->keytable = key_bindings_get_table(name, 1);
228 	c->keytable->references++;
229 }
230 
231 /* Get default key table. */
232 const char *
233 server_client_get_key_table(struct client *c)
234 {
235 	struct session	*s = c->session;
236 	const char	*name;
237 
238 	if (s == NULL)
239 		return ("root");
240 
241 	name = options_get_string(s->options, "key-table");
242 	if (*name == '\0')
243 		return ("root");
244 	return (name);
245 }
246 
247 /* Is this table the default key table? */
248 static int
249 server_client_is_default_key_table(struct client *c, struct key_table *table)
250 {
251 	return (strcmp(table->name, server_client_get_key_table(c)) == 0);
252 }
253 
254 /* Create a new client. */
255 struct client *
256 server_client_create(int fd)
257 {
258 	struct client	*c;
259 
260 	setblocking(fd, 0);
261 
262 	c = xcalloc(1, sizeof *c);
263 	c->references = 1;
264 	c->peer = proc_add_peer(server_proc, fd, server_client_dispatch, c);
265 
266 	if (gettimeofday(&c->creation_time, NULL) != 0)
267 		fatal("gettimeofday failed");
268 	memcpy(&c->activity_time, &c->creation_time, sizeof c->activity_time);
269 
270 	c->environ = environ_create();
271 
272 	c->fd = -1;
273 	c->out_fd = -1;
274 
275 	c->queue = cmdq_new();
276 	RB_INIT(&c->windows);
277 	RB_INIT(&c->files);
278 
279 	c->tty.sx = 80;
280 	c->tty.sy = 24;
281 
282 	status_init(c);
283 	c->flags |= CLIENT_FOCUSED;
284 
285 	c->keytable = key_bindings_get_table("root", 1);
286 	c->keytable->references++;
287 
288 	evtimer_set(&c->repeat_timer, server_client_repeat_timer, c);
289 	evtimer_set(&c->click_timer, server_client_click_timer, c);
290 
291 	TAILQ_INSERT_TAIL(&clients, c, entry);
292 	log_debug("new client %p", c);
293 	return (c);
294 }
295 
296 /* Open client terminal if needed. */
297 int
298 server_client_open(struct client *c, char **cause)
299 {
300 	const char	*ttynam = _PATH_TTY;
301 
302 	if (c->flags & CLIENT_CONTROL)
303 		return (0);
304 
305 	if (strcmp(c->ttyname, ttynam) == 0||
306 	    ((isatty(STDIN_FILENO) &&
307 	    (ttynam = ttyname(STDIN_FILENO)) != NULL &&
308 	    strcmp(c->ttyname, ttynam) == 0) ||
309 	    (isatty(STDOUT_FILENO) &&
310 	    (ttynam = ttyname(STDOUT_FILENO)) != NULL &&
311 	    strcmp(c->ttyname, ttynam) == 0) ||
312 	    (isatty(STDERR_FILENO) &&
313 	    (ttynam = ttyname(STDERR_FILENO)) != NULL &&
314 	    strcmp(c->ttyname, ttynam) == 0))) {
315 		xasprintf(cause, "can't use %s", c->ttyname);
316 		return (-1);
317 	}
318 
319 	if (!(c->flags & CLIENT_TERMINAL)) {
320 		*cause = xstrdup("not a terminal");
321 		return (-1);
322 	}
323 
324 	if (tty_open(&c->tty, cause) != 0)
325 		return (-1);
326 
327 	return (0);
328 }
329 
330 /* Lost an attached client. */
331 static void
332 server_client_attached_lost(struct client *c)
333 {
334 	struct session	*s;
335 	struct window	*w;
336 	struct client	*loop;
337 	struct client	*found;
338 
339 	log_debug("lost attached client %p", c);
340 
341 	/*
342 	 * By this point the session in the client has been cleared so walk all
343 	 * windows to find any with this client as the latest.
344 	 */
345 	RB_FOREACH(w, windows, &windows) {
346 		if (w->latest != c)
347 			continue;
348 
349 		found = NULL;
350 		TAILQ_FOREACH(loop, &clients, entry) {
351 			s = loop->session;
352 			if (loop == c || s == NULL || s->curw->window != w)
353 				continue;
354 			if (found == NULL || timercmp(&loop->activity_time,
355 			    &found->activity_time, >))
356 				found = loop;
357 		}
358 		if (found != NULL)
359 			server_client_update_latest(found);
360 	}
361 }
362 
363 /* Set client session. */
364 void
365 server_client_set_session(struct client *c, struct session *s)
366 {
367 	struct session	*old = c->session;
368 
369 	if (s != NULL && c->session != NULL && c->session != s)
370 		c->last_session = c->session;
371 	else if (s == NULL)
372 		c->last_session = NULL;
373 	c->session = s;
374 	c->flags |= CLIENT_FOCUSED;
375 
376 	if (old != NULL && old->curw != NULL)
377 		window_update_focus(old->curw->window);
378 	if (s != NULL) {
379 		recalculate_sizes();
380 		window_update_focus(s->curw->window);
381 		session_update_activity(s, NULL);
382 		gettimeofday(&s->last_attached_time, NULL);
383 		s->curw->flags &= ~WINLINK_ALERTFLAGS;
384 		s->curw->window->latest = c;
385 		alerts_check_session(s);
386 		tty_update_client_offset(c);
387 		status_timer_start(c);
388 		notify_client("client-session-changed", c);
389 		server_redraw_client(c);
390 	}
391 
392 	server_check_unattached();
393 	server_update_socket();
394 }
395 
396 /* Lost a client. */
397 void
398 server_client_lost(struct client *c)
399 {
400 	struct client_file	*cf, *cf1;
401 	struct client_window	*cw, *cw1;
402 
403 	c->flags |= CLIENT_DEAD;
404 
405 	server_client_clear_overlay(c);
406 	status_prompt_clear(c);
407 	status_message_clear(c);
408 
409 	RB_FOREACH_SAFE(cf, client_files, &c->files, cf1) {
410 		cf->error = EINTR;
411 		file_fire_done(cf);
412 	}
413 	RB_FOREACH_SAFE(cw, client_windows, &c->windows, cw1) {
414 		RB_REMOVE(client_windows, &c->windows, cw);
415 		free(cw);
416 	}
417 
418 	TAILQ_REMOVE(&clients, c, entry);
419 	log_debug("lost client %p", c);
420 
421 	if (c->flags & CLIENT_ATTACHED) {
422 		server_client_attached_lost(c);
423 		notify_client("client-detached", c);
424 	}
425 
426 	if (c->flags & CLIENT_CONTROL)
427 		control_stop(c);
428 	if (c->flags & CLIENT_TERMINAL)
429 		tty_free(&c->tty);
430 	free(c->ttyname);
431 	free(c->clipboard_panes);
432 
433 	free(c->term_name);
434 	free(c->term_type);
435 	tty_term_free_list(c->term_caps, c->term_ncaps);
436 
437 	status_free(c);
438 
439 	free(c->title);
440 	free((void *)c->cwd);
441 
442 	evtimer_del(&c->repeat_timer);
443 	evtimer_del(&c->click_timer);
444 
445 	key_bindings_unref_table(c->keytable);
446 
447 	free(c->message_string);
448 	if (event_initialized(&c->message_timer))
449 		evtimer_del(&c->message_timer);
450 
451 	free(c->prompt_saved);
452 	free(c->prompt_string);
453 	free(c->prompt_buffer);
454 
455 	format_lost_client(c);
456 	environ_free(c->environ);
457 
458 	proc_remove_peer(c->peer);
459 	c->peer = NULL;
460 
461 	if (c->out_fd != -1)
462 		close(c->out_fd);
463 	if (c->fd != -1) {
464 		close(c->fd);
465 		c->fd = -1;
466 	}
467 	server_client_unref(c);
468 
469 	server_add_accept(0); /* may be more file descriptors now */
470 
471 	recalculate_sizes();
472 	server_check_unattached();
473 	server_update_socket();
474 }
475 
476 /* Remove reference from a client. */
477 void
478 server_client_unref(struct client *c)
479 {
480 	log_debug("unref client %p (%d references)", c, c->references);
481 
482 	c->references--;
483 	if (c->references == 0)
484 		event_once(-1, EV_TIMEOUT, server_client_free, c, NULL);
485 }
486 
487 /* Free dead client. */
488 static void
489 server_client_free(__unused int fd, __unused short events, void *arg)
490 {
491 	struct client	*c = arg;
492 
493 	log_debug("free client %p (%d references)", c, c->references);
494 
495 	cmdq_free(c->queue);
496 
497 	if (c->references == 0) {
498 		free((void *)c->name);
499 		free(c);
500 	}
501 }
502 
503 /* Suspend a client. */
504 void
505 server_client_suspend(struct client *c)
506 {
507 	struct session	*s = c->session;
508 
509 	if (s == NULL || (c->flags & CLIENT_UNATTACHEDFLAGS))
510 		return;
511 
512 	tty_stop_tty(&c->tty);
513 	c->flags |= CLIENT_SUSPENDED;
514 	proc_send(c->peer, MSG_SUSPEND, -1, NULL, 0);
515 }
516 
517 /* Detach a client. */
518 void
519 server_client_detach(struct client *c, enum msgtype msgtype)
520 {
521 	struct session	*s = c->session;
522 
523 	if (s == NULL || (c->flags & CLIENT_NODETACHFLAGS))
524 		return;
525 
526 	c->flags |= CLIENT_EXIT;
527 
528 	c->exit_type = CLIENT_EXIT_DETACH;
529 	c->exit_msgtype = msgtype;
530 	c->exit_session = xstrdup(s->name);
531 }
532 
533 /* Execute command to replace a client. */
534 void
535 server_client_exec(struct client *c, const char *cmd)
536 {
537 	struct session	*s = c->session;
538 	char		*msg;
539 	const char	*shell;
540 	size_t		 cmdsize, shellsize;
541 
542 	if (*cmd == '\0')
543 		return;
544 	cmdsize = strlen(cmd) + 1;
545 
546 	if (s != NULL)
547 		shell = options_get_string(s->options, "default-shell");
548 	else
549 		shell = options_get_string(global_s_options, "default-shell");
550 	if (!checkshell(shell))
551 		shell = _PATH_BSHELL;
552 	shellsize = strlen(shell) + 1;
553 
554 	msg = xmalloc(cmdsize + shellsize);
555 	memcpy(msg, cmd, cmdsize);
556 	memcpy(msg + cmdsize, shell, shellsize);
557 
558 	proc_send(c->peer, MSG_EXEC, -1, msg, cmdsize + shellsize);
559 	free(msg);
560 }
561 
562 /* Check for mouse keys. */
563 static key_code
564 server_client_check_mouse(struct client *c, struct key_event *event)
565 {
566 	struct mouse_event	*m = &event->m;
567 	struct session		*s = c->session, *fs;
568 	struct winlink		*fwl;
569 	struct window_pane	*wp, *fwp;
570 	u_int			 x, y, b, sx, sy, px, py;
571 	int			 ignore = 0;
572 	key_code		 key;
573 	struct timeval		 tv;
574 	struct style_range	*sr;
575 	enum { NOTYPE,
576 	       MOVE,
577 	       DOWN,
578 	       UP,
579 	       DRAG,
580 	       WHEEL,
581 	       SECOND,
582 	       DOUBLE,
583 	       TRIPLE } type = NOTYPE;
584 	enum { NOWHERE,
585 	       PANE,
586 	       STATUS,
587 	       STATUS_LEFT,
588 	       STATUS_RIGHT,
589 	       STATUS_DEFAULT,
590 	       BORDER } where = NOWHERE;
591 
592 	log_debug("%s mouse %02x at %u,%u (last %u,%u) (%d)", c->name, m->b,
593 	    m->x, m->y, m->lx, m->ly, c->tty.mouse_drag_flag);
594 
595 	/* What type of event is this? */
596 	if (event->key == KEYC_DOUBLECLICK) {
597 		type = DOUBLE;
598 		x = m->x, y = m->y, b = m->b;
599 		ignore = 1;
600 		log_debug("double-click at %u,%u", x, y);
601 	} else if ((m->sgr_type != ' ' &&
602 	    MOUSE_DRAG(m->sgr_b) &&
603 	    MOUSE_RELEASE(m->sgr_b)) ||
604 	    (m->sgr_type == ' ' &&
605 	    MOUSE_DRAG(m->b) &&
606 	    MOUSE_RELEASE(m->b) &&
607 	    MOUSE_RELEASE(m->lb))) {
608 		type = MOVE;
609 		x = m->x, y = m->y, b = 0;
610 		log_debug("move at %u,%u", x, y);
611 	} else if (MOUSE_DRAG(m->b)) {
612 		type = DRAG;
613 		if (c->tty.mouse_drag_flag) {
614 			x = m->x, y = m->y, b = m->b;
615 			if (x == m->lx && y == m->ly)
616 				return (KEYC_UNKNOWN);
617 			log_debug("drag update at %u,%u", x, y);
618 		} else {
619 			x = m->lx, y = m->ly, b = m->lb;
620 			log_debug("drag start at %u,%u", x, y);
621 		}
622 	} else if (MOUSE_WHEEL(m->b)) {
623 		type = WHEEL;
624 		x = m->x, y = m->y, b = m->b;
625 		log_debug("wheel at %u,%u", x, y);
626 	} else if (MOUSE_RELEASE(m->b)) {
627 		type = UP;
628 		x = m->x, y = m->y, b = m->lb;
629 		log_debug("up at %u,%u", x, y);
630 	} else {
631 		if (c->flags & CLIENT_DOUBLECLICK) {
632 			evtimer_del(&c->click_timer);
633 			c->flags &= ~CLIENT_DOUBLECLICK;
634 			if (m->b == c->click_button) {
635 				type = SECOND;
636 				x = m->x, y = m->y, b = m->b;
637 				log_debug("second-click at %u,%u", x, y);
638 				c->flags |= CLIENT_TRIPLECLICK;
639 			}
640 		} else if (c->flags & CLIENT_TRIPLECLICK) {
641 			evtimer_del(&c->click_timer);
642 			c->flags &= ~CLIENT_TRIPLECLICK;
643 			if (m->b == c->click_button) {
644 				type = TRIPLE;
645 				x = m->x, y = m->y, b = m->b;
646 				log_debug("triple-click at %u,%u", x, y);
647 				goto have_event;
648 			}
649 		} else {
650 			type = DOWN;
651 			x = m->x, y = m->y, b = m->b;
652 			log_debug("down at %u,%u", x, y);
653 			c->flags |= CLIENT_DOUBLECLICK;
654 		}
655 
656 		if (KEYC_CLICK_TIMEOUT != 0) {
657 			memcpy(&c->click_event, m, sizeof c->click_event);
658 			c->click_button = m->b;
659 
660 			log_debug("click timer started");
661 			tv.tv_sec = KEYC_CLICK_TIMEOUT / 1000;
662 			tv.tv_usec = (KEYC_CLICK_TIMEOUT % 1000) * 1000L;
663 			evtimer_del(&c->click_timer);
664 			evtimer_add(&c->click_timer, &tv);
665 		}
666 	}
667 
668 have_event:
669 	if (type == NOTYPE)
670 		return (KEYC_UNKNOWN);
671 
672 	/* Save the session. */
673 	m->s = s->id;
674 	m->w = -1;
675 	m->wp = -1;
676 	m->ignore = ignore;
677 
678 	/* Is this on the status line? */
679 	m->statusat = status_at_line(c);
680 	m->statuslines = status_line_size(c);
681 	if (m->statusat != -1 &&
682 	    y >= (u_int)m->statusat &&
683 	    y < m->statusat + m->statuslines) {
684 		sr = status_get_range(c, x, y - m->statusat);
685 		if (sr == NULL) {
686 			where = STATUS_DEFAULT;
687 		} else {
688 			switch (sr->type) {
689 			case STYLE_RANGE_NONE:
690 				return (KEYC_UNKNOWN);
691 			case STYLE_RANGE_LEFT:
692 				log_debug("mouse range: left");
693 				where = STATUS_LEFT;
694 				break;
695 			case STYLE_RANGE_RIGHT:
696 				log_debug("mouse range: right");
697 				where = STATUS_RIGHT;
698 				break;
699 			case STYLE_RANGE_PANE:
700 				fwp = window_pane_find_by_id(sr->argument);
701 				if (fwp == NULL)
702 					return (KEYC_UNKNOWN);
703 				m->wp = sr->argument;
704 
705 				log_debug("mouse range: pane %%%u", m->wp);
706 				where = STATUS;
707 				break;
708 			case STYLE_RANGE_WINDOW:
709 				fwl = winlink_find_by_index(&s->windows,
710 				    sr->argument);
711 				if (fwl == NULL)
712 					return (KEYC_UNKNOWN);
713 				m->w = fwl->window->id;
714 
715 				log_debug("mouse range: window @%u", m->w);
716 				where = STATUS;
717 				break;
718 			case STYLE_RANGE_SESSION:
719 				fs = session_find_by_id(sr->argument);
720 				if (fs == NULL)
721 					return (KEYC_UNKNOWN);
722 				m->s = sr->argument;
723 
724 				log_debug("mouse range: session $%u", m->s);
725 				where = STATUS;
726 				break;
727 			case STYLE_RANGE_USER:
728 				where = STATUS;
729 				break;
730 			}
731 		}
732 	}
733 
734 	/* Not on status line. Adjust position and check for border or pane. */
735 	if (where == NOWHERE) {
736 		px = x;
737 		if (m->statusat == 0 && y >= m->statuslines)
738 			py = y - m->statuslines;
739 		else if (m->statusat > 0 && y >= (u_int)m->statusat)
740 			py = m->statusat - 1;
741 		else
742 			py = y;
743 
744 		tty_window_offset(&c->tty, &m->ox, &m->oy, &sx, &sy);
745 		log_debug("mouse window @%u at %u,%u (%ux%u)",
746 		    s->curw->window->id, m->ox, m->oy, sx, sy);
747 		if (px > sx || py > sy)
748 			return (KEYC_UNKNOWN);
749 		px = px + m->ox;
750 		py = py + m->oy;
751 
752 		/* Try the pane borders if not zoomed. */
753 		if (~s->curw->window->flags & WINDOW_ZOOMED) {
754 			TAILQ_FOREACH(wp, &s->curw->window->panes, entry) {
755 				if ((wp->xoff + wp->sx == px &&
756 				    wp->yoff <= 1 + py &&
757 				    wp->yoff + wp->sy >= py) ||
758 				    (wp->yoff + wp->sy == py &&
759 				    wp->xoff <= 1 + px &&
760 				    wp->xoff + wp->sx >= px))
761 					break;
762 			}
763 			if (wp != NULL)
764 				where = BORDER;
765 		}
766 
767 		/* Otherwise try inside the pane. */
768 		if (where == NOWHERE) {
769 			wp = window_get_active_at(s->curw->window, px, py);
770 			if (wp != NULL)
771 				where = PANE;
772 			else
773 				return (KEYC_UNKNOWN);
774 		}
775 		if (where == PANE)
776 			log_debug("mouse %u,%u on pane %%%u", x, y, wp->id);
777 		else if (where == BORDER)
778 			log_debug("mouse on pane %%%u border", wp->id);
779 		m->wp = wp->id;
780 		m->w = wp->window->id;
781 	} else
782 		m->wp = -1;
783 
784 	/* Stop dragging if needed. */
785 	if (type != DRAG && type != WHEEL && c->tty.mouse_drag_flag != 0) {
786 		if (c->tty.mouse_drag_release != NULL)
787 			c->tty.mouse_drag_release(c, m);
788 
789 		c->tty.mouse_drag_update = NULL;
790 		c->tty.mouse_drag_release = NULL;
791 
792 		/*
793 		 * End a mouse drag by passing a MouseDragEnd key corresponding
794 		 * to the button that started the drag.
795 		 */
796 		switch (c->tty.mouse_drag_flag - 1) {
797 		case MOUSE_BUTTON_1:
798 			if (where == PANE)
799 				key = KEYC_MOUSEDRAGEND1_PANE;
800 			if (where == STATUS)
801 				key = KEYC_MOUSEDRAGEND1_STATUS;
802 			if (where == STATUS_LEFT)
803 				key = KEYC_MOUSEDRAGEND1_STATUS_LEFT;
804 			if (where == STATUS_RIGHT)
805 				key = KEYC_MOUSEDRAGEND1_STATUS_RIGHT;
806 			if (where == STATUS_DEFAULT)
807 				key = KEYC_MOUSEDRAGEND1_STATUS_DEFAULT;
808 			if (where == BORDER)
809 				key = KEYC_MOUSEDRAGEND1_BORDER;
810 			break;
811 		case MOUSE_BUTTON_2:
812 			if (where == PANE)
813 				key = KEYC_MOUSEDRAGEND2_PANE;
814 			if (where == STATUS)
815 				key = KEYC_MOUSEDRAGEND2_STATUS;
816 			if (where == STATUS_LEFT)
817 				key = KEYC_MOUSEDRAGEND2_STATUS_LEFT;
818 			if (where == STATUS_RIGHT)
819 				key = KEYC_MOUSEDRAGEND2_STATUS_RIGHT;
820 			if (where == STATUS_DEFAULT)
821 				key = KEYC_MOUSEDRAGEND2_STATUS_DEFAULT;
822 			if (where == BORDER)
823 				key = KEYC_MOUSEDRAGEND2_BORDER;
824 			break;
825 		case MOUSE_BUTTON_3:
826 			if (where == PANE)
827 				key = KEYC_MOUSEDRAGEND3_PANE;
828 			if (where == STATUS)
829 				key = KEYC_MOUSEDRAGEND3_STATUS;
830 			if (where == STATUS_LEFT)
831 				key = KEYC_MOUSEDRAGEND3_STATUS_LEFT;
832 			if (where == STATUS_RIGHT)
833 				key = KEYC_MOUSEDRAGEND3_STATUS_RIGHT;
834 			if (where == STATUS_DEFAULT)
835 				key = KEYC_MOUSEDRAGEND3_STATUS_DEFAULT;
836 			if (where == BORDER)
837 				key = KEYC_MOUSEDRAGEND3_BORDER;
838 			break;
839 		case MOUSE_BUTTON_6:
840 			if (where == PANE)
841 				key = KEYC_MOUSEDRAGEND6_PANE;
842 			if (where == STATUS)
843 				key = KEYC_MOUSEDRAGEND6_STATUS;
844 			if (where == STATUS_LEFT)
845 				key = KEYC_MOUSEDRAGEND6_STATUS_LEFT;
846 			if (where == STATUS_RIGHT)
847 				key = KEYC_MOUSEDRAGEND6_STATUS_RIGHT;
848 			if (where == STATUS_DEFAULT)
849 				key = KEYC_MOUSEDRAGEND6_STATUS_DEFAULT;
850 			if (where == BORDER)
851 				key = KEYC_MOUSEDRAGEND6_BORDER;
852 			break;
853 		case MOUSE_BUTTON_7:
854 			if (where == PANE)
855 				key = KEYC_MOUSEDRAGEND7_PANE;
856 			if (where == STATUS)
857 				key = KEYC_MOUSEDRAGEND7_STATUS;
858 			if (where == STATUS_LEFT)
859 				key = KEYC_MOUSEDRAGEND7_STATUS_LEFT;
860 			if (where == STATUS_RIGHT)
861 				key = KEYC_MOUSEDRAGEND7_STATUS_RIGHT;
862 			if (where == STATUS_DEFAULT)
863 				key = KEYC_MOUSEDRAGEND7_STATUS_DEFAULT;
864 			if (where == BORDER)
865 				key = KEYC_MOUSEDRAGEND7_BORDER;
866 			break;
867 		case MOUSE_BUTTON_8:
868 			if (where == PANE)
869 				key = KEYC_MOUSEDRAGEND8_PANE;
870 			if (where == STATUS)
871 				key = KEYC_MOUSEDRAGEND8_STATUS;
872 			if (where == STATUS_LEFT)
873 				key = KEYC_MOUSEDRAGEND8_STATUS_LEFT;
874 			if (where == STATUS_RIGHT)
875 				key = KEYC_MOUSEDRAGEND8_STATUS_RIGHT;
876 			if (where == STATUS_DEFAULT)
877 				key = KEYC_MOUSEDRAGEND8_STATUS_DEFAULT;
878 			if (where == BORDER)
879 				key = KEYC_MOUSEDRAGEND8_BORDER;
880 			break;
881 		case MOUSE_BUTTON_9:
882 			if (where == PANE)
883 				key = KEYC_MOUSEDRAGEND9_PANE;
884 			if (where == STATUS)
885 				key = KEYC_MOUSEDRAGEND9_STATUS;
886 			if (where == STATUS_LEFT)
887 				key = KEYC_MOUSEDRAGEND9_STATUS_LEFT;
888 			if (where == STATUS_RIGHT)
889 				key = KEYC_MOUSEDRAGEND9_STATUS_RIGHT;
890 			if (where == STATUS_DEFAULT)
891 				key = KEYC_MOUSEDRAGEND9_STATUS_DEFAULT;
892 			if (where == BORDER)
893 				key = KEYC_MOUSEDRAGEND9_BORDER;
894 			break;
895 		case MOUSE_BUTTON_10:
896 			if (where == PANE)
897 				key = KEYC_MOUSEDRAGEND10_PANE;
898 			if (where == STATUS)
899 				key = KEYC_MOUSEDRAGEND10_STATUS;
900 			if (where == STATUS_LEFT)
901 				key = KEYC_MOUSEDRAGEND10_STATUS_LEFT;
902 			if (where == STATUS_RIGHT)
903 				key = KEYC_MOUSEDRAGEND10_STATUS_RIGHT;
904 			if (where == STATUS_DEFAULT)
905 				key = KEYC_MOUSEDRAGEND10_STATUS_DEFAULT;
906 			if (where == BORDER)
907 				key = KEYC_MOUSEDRAGEND10_BORDER;
908 			break;
909 		case MOUSE_BUTTON_11:
910 			if (where == PANE)
911 				key = KEYC_MOUSEDRAGEND11_PANE;
912 			if (where == STATUS)
913 				key = KEYC_MOUSEDRAGEND11_STATUS;
914 			if (where == STATUS_LEFT)
915 				key = KEYC_MOUSEDRAGEND11_STATUS_LEFT;
916 			if (where == STATUS_RIGHT)
917 				key = KEYC_MOUSEDRAGEND11_STATUS_RIGHT;
918 			if (where == STATUS_DEFAULT)
919 				key = KEYC_MOUSEDRAGEND11_STATUS_DEFAULT;
920 			if (where == BORDER)
921 				key = KEYC_MOUSEDRAGEND11_BORDER;
922 			break;
923 		default:
924 			key = KEYC_MOUSE;
925 			break;
926 		}
927 		c->tty.mouse_drag_flag = 0;
928 		goto out;
929 	}
930 
931 	/* Convert to a key binding. */
932 	key = KEYC_UNKNOWN;
933 	switch (type) {
934 	case NOTYPE:
935 		break;
936 	case MOVE:
937 		if (where == PANE)
938 			key = KEYC_MOUSEMOVE_PANE;
939 		if (where == STATUS)
940 			key = KEYC_MOUSEMOVE_STATUS;
941 		if (where == STATUS_LEFT)
942 			key = KEYC_MOUSEMOVE_STATUS_LEFT;
943 		if (where == STATUS_RIGHT)
944 			key = KEYC_MOUSEMOVE_STATUS_RIGHT;
945 		if (where == STATUS_DEFAULT)
946 			key = KEYC_MOUSEMOVE_STATUS_DEFAULT;
947 		if (where == BORDER)
948 			key = KEYC_MOUSEMOVE_BORDER;
949 		break;
950 	case DRAG:
951 		if (c->tty.mouse_drag_update != NULL)
952 			key = KEYC_DRAGGING;
953 		else {
954 			switch (MOUSE_BUTTONS(b)) {
955 			case MOUSE_BUTTON_1:
956 				if (where == PANE)
957 					key = KEYC_MOUSEDRAG1_PANE;
958 				if (where == STATUS)
959 					key = KEYC_MOUSEDRAG1_STATUS;
960 				if (where == STATUS_LEFT)
961 					key = KEYC_MOUSEDRAG1_STATUS_LEFT;
962 				if (where == STATUS_RIGHT)
963 					key = KEYC_MOUSEDRAG1_STATUS_RIGHT;
964 				if (where == STATUS_DEFAULT)
965 					key = KEYC_MOUSEDRAG1_STATUS_DEFAULT;
966 				if (where == BORDER)
967 					key = KEYC_MOUSEDRAG1_BORDER;
968 				break;
969 			case MOUSE_BUTTON_2:
970 				if (where == PANE)
971 					key = KEYC_MOUSEDRAG2_PANE;
972 				if (where == STATUS)
973 					key = KEYC_MOUSEDRAG2_STATUS;
974 				if (where == STATUS_LEFT)
975 					key = KEYC_MOUSEDRAG2_STATUS_LEFT;
976 				if (where == STATUS_RIGHT)
977 					key = KEYC_MOUSEDRAG2_STATUS_RIGHT;
978 				if (where == STATUS_DEFAULT)
979 					key = KEYC_MOUSEDRAG2_STATUS_DEFAULT;
980 				if (where == BORDER)
981 					key = KEYC_MOUSEDRAG2_BORDER;
982 				break;
983 			case MOUSE_BUTTON_3:
984 				if (where == PANE)
985 					key = KEYC_MOUSEDRAG3_PANE;
986 				if (where == STATUS)
987 					key = KEYC_MOUSEDRAG3_STATUS;
988 				if (where == STATUS_LEFT)
989 					key = KEYC_MOUSEDRAG3_STATUS_LEFT;
990 				if (where == STATUS_RIGHT)
991 					key = KEYC_MOUSEDRAG3_STATUS_RIGHT;
992 				if (where == STATUS_DEFAULT)
993 					key = KEYC_MOUSEDRAG3_STATUS_DEFAULT;
994 				if (where == BORDER)
995 					key = KEYC_MOUSEDRAG3_BORDER;
996 				break;
997 			case MOUSE_BUTTON_6:
998 				if (where == PANE)
999 					key = KEYC_MOUSEDRAG6_PANE;
1000 				if (where == STATUS)
1001 					key = KEYC_MOUSEDRAG6_STATUS;
1002 				if (where == STATUS_LEFT)
1003 					key = KEYC_MOUSEDRAG6_STATUS_LEFT;
1004 				if (where == STATUS_RIGHT)
1005 					key = KEYC_MOUSEDRAG6_STATUS_RIGHT;
1006 				if (where == STATUS_DEFAULT)
1007 					key = KEYC_MOUSEDRAG6_STATUS_DEFAULT;
1008 				if (where == BORDER)
1009 					key = KEYC_MOUSEDRAG6_BORDER;
1010 				break;
1011 			case MOUSE_BUTTON_7:
1012 				if (where == PANE)
1013 					key = KEYC_MOUSEDRAG7_PANE;
1014 				if (where == STATUS)
1015 					key = KEYC_MOUSEDRAG7_STATUS;
1016 				if (where == STATUS_LEFT)
1017 					key = KEYC_MOUSEDRAG7_STATUS_LEFT;
1018 				if (where == STATUS_RIGHT)
1019 					key = KEYC_MOUSEDRAG7_STATUS_RIGHT;
1020 				if (where == STATUS_DEFAULT)
1021 					key = KEYC_MOUSEDRAG7_STATUS_DEFAULT;
1022 				if (where == BORDER)
1023 					key = KEYC_MOUSEDRAG7_BORDER;
1024 				break;
1025 			case MOUSE_BUTTON_8:
1026 				if (where == PANE)
1027 					key = KEYC_MOUSEDRAG8_PANE;
1028 				if (where == STATUS)
1029 					key = KEYC_MOUSEDRAG8_STATUS;
1030 				if (where == STATUS_LEFT)
1031 					key = KEYC_MOUSEDRAG8_STATUS_LEFT;
1032 				if (where == STATUS_RIGHT)
1033 					key = KEYC_MOUSEDRAG8_STATUS_RIGHT;
1034 				if (where == STATUS_DEFAULT)
1035 					key = KEYC_MOUSEDRAG8_STATUS_DEFAULT;
1036 				if (where == BORDER)
1037 					key = KEYC_MOUSEDRAG8_BORDER;
1038 				break;
1039 			case MOUSE_BUTTON_9:
1040 				if (where == PANE)
1041 					key = KEYC_MOUSEDRAG9_PANE;
1042 				if (where == STATUS)
1043 					key = KEYC_MOUSEDRAG9_STATUS;
1044 				if (where == STATUS_LEFT)
1045 					key = KEYC_MOUSEDRAG9_STATUS_LEFT;
1046 				if (where == STATUS_RIGHT)
1047 					key = KEYC_MOUSEDRAG9_STATUS_RIGHT;
1048 				if (where == STATUS_DEFAULT)
1049 					key = KEYC_MOUSEDRAG9_STATUS_DEFAULT;
1050 				if (where == BORDER)
1051 					key = KEYC_MOUSEDRAG9_BORDER;
1052 				break;
1053 			case MOUSE_BUTTON_10:
1054 				if (where == PANE)
1055 					key = KEYC_MOUSEDRAG10_PANE;
1056 				if (where == STATUS)
1057 					key = KEYC_MOUSEDRAG10_STATUS;
1058 				if (where == STATUS_LEFT)
1059 					key = KEYC_MOUSEDRAG10_STATUS_LEFT;
1060 				if (where == STATUS_RIGHT)
1061 					key = KEYC_MOUSEDRAG10_STATUS_RIGHT;
1062 				if (where == STATUS_DEFAULT)
1063 					key = KEYC_MOUSEDRAG10_STATUS_DEFAULT;
1064 				if (where == BORDER)
1065 					key = KEYC_MOUSEDRAG10_BORDER;
1066 				break;
1067 			case MOUSE_BUTTON_11:
1068 				if (where == PANE)
1069 					key = KEYC_MOUSEDRAG11_PANE;
1070 				if (where == STATUS)
1071 					key = KEYC_MOUSEDRAG11_STATUS;
1072 				if (where == STATUS_LEFT)
1073 					key = KEYC_MOUSEDRAG11_STATUS_LEFT;
1074 				if (where == STATUS_RIGHT)
1075 					key = KEYC_MOUSEDRAG11_STATUS_RIGHT;
1076 				if (where == STATUS_DEFAULT)
1077 					key = KEYC_MOUSEDRAG11_STATUS_DEFAULT;
1078 				if (where == BORDER)
1079 					key = KEYC_MOUSEDRAG11_BORDER;
1080 				break;
1081 			}
1082 		}
1083 
1084 		/*
1085 		 * Begin a drag by setting the flag to a non-zero value that
1086 		 * corresponds to the mouse button in use.
1087 		 */
1088 		c->tty.mouse_drag_flag = MOUSE_BUTTONS(b) + 1;
1089 		break;
1090 	case WHEEL:
1091 		if (MOUSE_BUTTONS(b) == MOUSE_WHEEL_UP) {
1092 			if (where == PANE)
1093 				key = KEYC_WHEELUP_PANE;
1094 			if (where == STATUS)
1095 				key = KEYC_WHEELUP_STATUS;
1096 			if (where == STATUS_LEFT)
1097 				key = KEYC_WHEELUP_STATUS_LEFT;
1098 			if (where == STATUS_RIGHT)
1099 				key = KEYC_WHEELUP_STATUS_RIGHT;
1100 			if (where == STATUS_DEFAULT)
1101 				key = KEYC_WHEELUP_STATUS_DEFAULT;
1102 			if (where == BORDER)
1103 				key = KEYC_WHEELUP_BORDER;
1104 		} else {
1105 			if (where == PANE)
1106 				key = KEYC_WHEELDOWN_PANE;
1107 			if (where == STATUS)
1108 				key = KEYC_WHEELDOWN_STATUS;
1109 			if (where == STATUS_LEFT)
1110 				key = KEYC_WHEELDOWN_STATUS_LEFT;
1111 			if (where == STATUS_RIGHT)
1112 				key = KEYC_WHEELDOWN_STATUS_RIGHT;
1113 			if (where == STATUS_DEFAULT)
1114 				key = KEYC_WHEELDOWN_STATUS_DEFAULT;
1115 			if (where == BORDER)
1116 				key = KEYC_WHEELDOWN_BORDER;
1117 		}
1118 		break;
1119 	case UP:
1120 		switch (MOUSE_BUTTONS(b)) {
1121 		case MOUSE_BUTTON_1:
1122 			if (where == PANE)
1123 				key = KEYC_MOUSEUP1_PANE;
1124 			if (where == STATUS)
1125 				key = KEYC_MOUSEUP1_STATUS;
1126 			if (where == STATUS_LEFT)
1127 				key = KEYC_MOUSEUP1_STATUS_LEFT;
1128 			if (where == STATUS_RIGHT)
1129 				key = KEYC_MOUSEUP1_STATUS_RIGHT;
1130 			if (where == STATUS_DEFAULT)
1131 				key = KEYC_MOUSEUP1_STATUS_DEFAULT;
1132 			if (where == BORDER)
1133 				key = KEYC_MOUSEUP1_BORDER;
1134 			break;
1135 		case MOUSE_BUTTON_2:
1136 			if (where == PANE)
1137 				key = KEYC_MOUSEUP2_PANE;
1138 			if (where == STATUS)
1139 				key = KEYC_MOUSEUP2_STATUS;
1140 			if (where == STATUS_LEFT)
1141 				key = KEYC_MOUSEUP2_STATUS_LEFT;
1142 			if (where == STATUS_RIGHT)
1143 				key = KEYC_MOUSEUP2_STATUS_RIGHT;
1144 			if (where == STATUS_DEFAULT)
1145 				key = KEYC_MOUSEUP2_STATUS_DEFAULT;
1146 			if (where == BORDER)
1147 				key = KEYC_MOUSEUP2_BORDER;
1148 			break;
1149 		case MOUSE_BUTTON_3:
1150 			if (where == PANE)
1151 				key = KEYC_MOUSEUP3_PANE;
1152 			if (where == STATUS)
1153 				key = KEYC_MOUSEUP3_STATUS;
1154 			if (where == STATUS_LEFT)
1155 				key = KEYC_MOUSEUP3_STATUS_LEFT;
1156 			if (where == STATUS_RIGHT)
1157 				key = KEYC_MOUSEUP3_STATUS_RIGHT;
1158 			if (where == STATUS_DEFAULT)
1159 				key = KEYC_MOUSEUP3_STATUS_DEFAULT;
1160 			if (where == BORDER)
1161 				key = KEYC_MOUSEUP3_BORDER;
1162 			break;
1163 		case MOUSE_BUTTON_6:
1164 			if (where == PANE)
1165 				key = KEYC_MOUSEUP6_PANE;
1166 			if (where == STATUS)
1167 				key = KEYC_MOUSEUP6_STATUS;
1168 			if (where == STATUS_LEFT)
1169 				key = KEYC_MOUSEUP6_STATUS_LEFT;
1170 			if (where == STATUS_RIGHT)
1171 				key = KEYC_MOUSEUP6_STATUS_RIGHT;
1172 			if (where == STATUS_DEFAULT)
1173 				key = KEYC_MOUSEUP6_STATUS_DEFAULT;
1174 			if (where == BORDER)
1175 				key = KEYC_MOUSEUP6_BORDER;
1176 			break;
1177 		case MOUSE_BUTTON_7:
1178 			if (where == PANE)
1179 				key = KEYC_MOUSEUP7_PANE;
1180 			if (where == STATUS)
1181 				key = KEYC_MOUSEUP7_STATUS;
1182 			if (where == STATUS_LEFT)
1183 				key = KEYC_MOUSEUP7_STATUS_LEFT;
1184 			if (where == STATUS_RIGHT)
1185 				key = KEYC_MOUSEUP7_STATUS_RIGHT;
1186 			if (where == STATUS_DEFAULT)
1187 				key = KEYC_MOUSEUP7_STATUS_DEFAULT;
1188 			if (where == BORDER)
1189 				key = KEYC_MOUSEUP7_BORDER;
1190 			break;
1191 		case MOUSE_BUTTON_8:
1192 			if (where == PANE)
1193 				key = KEYC_MOUSEUP8_PANE;
1194 			if (where == STATUS)
1195 				key = KEYC_MOUSEUP8_STATUS;
1196 			if (where == STATUS_LEFT)
1197 				key = KEYC_MOUSEUP8_STATUS_LEFT;
1198 			if (where == STATUS_RIGHT)
1199 				key = KEYC_MOUSEUP8_STATUS_RIGHT;
1200 			if (where == STATUS_DEFAULT)
1201 				key = KEYC_MOUSEUP8_STATUS_DEFAULT;
1202 			if (where == BORDER)
1203 				key = KEYC_MOUSEUP8_BORDER;
1204 			break;
1205 		case MOUSE_BUTTON_9:
1206 			if (where == PANE)
1207 				key = KEYC_MOUSEUP9_PANE;
1208 			if (where == STATUS)
1209 				key = KEYC_MOUSEUP9_STATUS;
1210 			if (where == STATUS_LEFT)
1211 				key = KEYC_MOUSEUP9_STATUS_LEFT;
1212 			if (where == STATUS_RIGHT)
1213 				key = KEYC_MOUSEUP9_STATUS_RIGHT;
1214 			if (where == STATUS_DEFAULT)
1215 				key = KEYC_MOUSEUP9_STATUS_DEFAULT;
1216 			if (where == BORDER)
1217 				key = KEYC_MOUSEUP9_BORDER;
1218 			break;
1219 		case MOUSE_BUTTON_10:
1220 			if (where == PANE)
1221 				key = KEYC_MOUSEUP1_PANE;
1222 			if (where == STATUS)
1223 				key = KEYC_MOUSEUP1_STATUS;
1224 			if (where == STATUS_LEFT)
1225 				key = KEYC_MOUSEUP1_STATUS_LEFT;
1226 			if (where == STATUS_RIGHT)
1227 				key = KEYC_MOUSEUP1_STATUS_RIGHT;
1228 			if (where == STATUS_DEFAULT)
1229 				key = KEYC_MOUSEUP1_STATUS_DEFAULT;
1230 			if (where == BORDER)
1231 				key = KEYC_MOUSEUP1_BORDER;
1232 			break;
1233 		case MOUSE_BUTTON_11:
1234 			if (where == PANE)
1235 				key = KEYC_MOUSEUP11_PANE;
1236 			if (where == STATUS)
1237 				key = KEYC_MOUSEUP11_STATUS;
1238 			if (where == STATUS_LEFT)
1239 				key = KEYC_MOUSEUP11_STATUS_LEFT;
1240 			if (where == STATUS_RIGHT)
1241 				key = KEYC_MOUSEUP11_STATUS_RIGHT;
1242 			if (where == STATUS_DEFAULT)
1243 				key = KEYC_MOUSEUP11_STATUS_DEFAULT;
1244 			if (where == BORDER)
1245 				key = KEYC_MOUSEUP11_BORDER;
1246 			break;
1247 		}
1248 		break;
1249 	case DOWN:
1250 		switch (MOUSE_BUTTONS(b)) {
1251 		case MOUSE_BUTTON_1:
1252 			if (where == PANE)
1253 				key = KEYC_MOUSEDOWN1_PANE;
1254 			if (where == STATUS)
1255 				key = KEYC_MOUSEDOWN1_STATUS;
1256 			if (where == STATUS_LEFT)
1257 				key = KEYC_MOUSEDOWN1_STATUS_LEFT;
1258 			if (where == STATUS_RIGHT)
1259 				key = KEYC_MOUSEDOWN1_STATUS_RIGHT;
1260 			if (where == STATUS_DEFAULT)
1261 				key = KEYC_MOUSEDOWN1_STATUS_DEFAULT;
1262 			if (where == BORDER)
1263 				key = KEYC_MOUSEDOWN1_BORDER;
1264 			break;
1265 		case MOUSE_BUTTON_2:
1266 			if (where == PANE)
1267 				key = KEYC_MOUSEDOWN2_PANE;
1268 			if (where == STATUS)
1269 				key = KEYC_MOUSEDOWN2_STATUS;
1270 			if (where == STATUS_LEFT)
1271 				key = KEYC_MOUSEDOWN2_STATUS_LEFT;
1272 			if (where == STATUS_RIGHT)
1273 				key = KEYC_MOUSEDOWN2_STATUS_RIGHT;
1274 			if (where == STATUS_DEFAULT)
1275 				key = KEYC_MOUSEDOWN2_STATUS_DEFAULT;
1276 			if (where == BORDER)
1277 				key = KEYC_MOUSEDOWN2_BORDER;
1278 			break;
1279 		case MOUSE_BUTTON_3:
1280 			if (where == PANE)
1281 				key = KEYC_MOUSEDOWN3_PANE;
1282 			if (where == STATUS)
1283 				key = KEYC_MOUSEDOWN3_STATUS;
1284 			if (where == STATUS_LEFT)
1285 				key = KEYC_MOUSEDOWN3_STATUS_LEFT;
1286 			if (where == STATUS_RIGHT)
1287 				key = KEYC_MOUSEDOWN3_STATUS_RIGHT;
1288 			if (where == STATUS_DEFAULT)
1289 				key = KEYC_MOUSEDOWN3_STATUS_DEFAULT;
1290 			if (where == BORDER)
1291 				key = KEYC_MOUSEDOWN3_BORDER;
1292 			break;
1293 		case MOUSE_BUTTON_6:
1294 			if (where == PANE)
1295 				key = KEYC_MOUSEDOWN6_PANE;
1296 			if (where == STATUS)
1297 				key = KEYC_MOUSEDOWN6_STATUS;
1298 			if (where == STATUS_LEFT)
1299 				key = KEYC_MOUSEDOWN6_STATUS_LEFT;
1300 			if (where == STATUS_RIGHT)
1301 				key = KEYC_MOUSEDOWN6_STATUS_RIGHT;
1302 			if (where == STATUS_DEFAULT)
1303 				key = KEYC_MOUSEDOWN6_STATUS_DEFAULT;
1304 			if (where == BORDER)
1305 				key = KEYC_MOUSEDOWN6_BORDER;
1306 			break;
1307 		case MOUSE_BUTTON_7:
1308 			if (where == PANE)
1309 				key = KEYC_MOUSEDOWN7_PANE;
1310 			if (where == STATUS)
1311 				key = KEYC_MOUSEDOWN7_STATUS;
1312 			if (where == STATUS_LEFT)
1313 				key = KEYC_MOUSEDOWN7_STATUS_LEFT;
1314 			if (where == STATUS_RIGHT)
1315 				key = KEYC_MOUSEDOWN7_STATUS_RIGHT;
1316 			if (where == STATUS_DEFAULT)
1317 				key = KEYC_MOUSEDOWN7_STATUS_DEFAULT;
1318 			if (where == BORDER)
1319 				key = KEYC_MOUSEDOWN7_BORDER;
1320 			break;
1321 		case MOUSE_BUTTON_8:
1322 			if (where == PANE)
1323 				key = KEYC_MOUSEDOWN8_PANE;
1324 			if (where == STATUS)
1325 				key = KEYC_MOUSEDOWN8_STATUS;
1326 			if (where == STATUS_LEFT)
1327 				key = KEYC_MOUSEDOWN8_STATUS_LEFT;
1328 			if (where == STATUS_RIGHT)
1329 				key = KEYC_MOUSEDOWN8_STATUS_RIGHT;
1330 			if (where == STATUS_DEFAULT)
1331 				key = KEYC_MOUSEDOWN8_STATUS_DEFAULT;
1332 			if (where == BORDER)
1333 				key = KEYC_MOUSEDOWN8_BORDER;
1334 			break;
1335 		case MOUSE_BUTTON_9:
1336 			if (where == PANE)
1337 				key = KEYC_MOUSEDOWN9_PANE;
1338 			if (where == STATUS)
1339 				key = KEYC_MOUSEDOWN9_STATUS;
1340 			if (where == STATUS_LEFT)
1341 				key = KEYC_MOUSEDOWN9_STATUS_LEFT;
1342 			if (where == STATUS_RIGHT)
1343 				key = KEYC_MOUSEDOWN9_STATUS_RIGHT;
1344 			if (where == STATUS_DEFAULT)
1345 				key = KEYC_MOUSEDOWN9_STATUS_DEFAULT;
1346 			if (where == BORDER)
1347 				key = KEYC_MOUSEDOWN9_BORDER;
1348 			break;
1349 		case MOUSE_BUTTON_10:
1350 			if (where == PANE)
1351 				key = KEYC_MOUSEDOWN10_PANE;
1352 			if (where == STATUS)
1353 				key = KEYC_MOUSEDOWN10_STATUS;
1354 			if (where == STATUS_LEFT)
1355 				key = KEYC_MOUSEDOWN10_STATUS_LEFT;
1356 			if (where == STATUS_RIGHT)
1357 				key = KEYC_MOUSEDOWN10_STATUS_RIGHT;
1358 			if (where == STATUS_DEFAULT)
1359 				key = KEYC_MOUSEDOWN10_STATUS_DEFAULT;
1360 			if (where == BORDER)
1361 				key = KEYC_MOUSEDOWN10_BORDER;
1362 			break;
1363 		case MOUSE_BUTTON_11:
1364 			if (where == PANE)
1365 				key = KEYC_MOUSEDOWN11_PANE;
1366 			if (where == STATUS)
1367 				key = KEYC_MOUSEDOWN11_STATUS;
1368 			if (where == STATUS_LEFT)
1369 				key = KEYC_MOUSEDOWN11_STATUS_LEFT;
1370 			if (where == STATUS_RIGHT)
1371 				key = KEYC_MOUSEDOWN11_STATUS_RIGHT;
1372 			if (where == STATUS_DEFAULT)
1373 				key = KEYC_MOUSEDOWN11_STATUS_DEFAULT;
1374 			if (where == BORDER)
1375 				key = KEYC_MOUSEDOWN11_BORDER;
1376 			break;
1377 		}
1378 		break;
1379 	case SECOND:
1380 		switch (MOUSE_BUTTONS(b)) {
1381 		case MOUSE_BUTTON_1:
1382 			if (where == PANE)
1383 				key = KEYC_SECONDCLICK1_PANE;
1384 			if (where == STATUS)
1385 				key = KEYC_SECONDCLICK1_STATUS;
1386 			if (where == STATUS_LEFT)
1387 				key = KEYC_SECONDCLICK1_STATUS_LEFT;
1388 			if (where == STATUS_RIGHT)
1389 				key = KEYC_SECONDCLICK1_STATUS_RIGHT;
1390 			if (where == STATUS_DEFAULT)
1391 				key = KEYC_SECONDCLICK1_STATUS_DEFAULT;
1392 			if (where == BORDER)
1393 				key = KEYC_SECONDCLICK1_BORDER;
1394 			break;
1395 		case MOUSE_BUTTON_2:
1396 			if (where == PANE)
1397 				key = KEYC_SECONDCLICK2_PANE;
1398 			if (where == STATUS)
1399 				key = KEYC_SECONDCLICK2_STATUS;
1400 			if (where == STATUS_LEFT)
1401 				key = KEYC_SECONDCLICK2_STATUS_LEFT;
1402 			if (where == STATUS_RIGHT)
1403 				key = KEYC_SECONDCLICK2_STATUS_RIGHT;
1404 			if (where == STATUS_DEFAULT)
1405 				key = KEYC_SECONDCLICK2_STATUS_DEFAULT;
1406 			if (where == BORDER)
1407 				key = KEYC_SECONDCLICK2_BORDER;
1408 			break;
1409 		case MOUSE_BUTTON_3:
1410 			if (where == PANE)
1411 				key = KEYC_SECONDCLICK3_PANE;
1412 			if (where == STATUS)
1413 				key = KEYC_SECONDCLICK3_STATUS;
1414 			if (where == STATUS_LEFT)
1415 				key = KEYC_SECONDCLICK3_STATUS_LEFT;
1416 			if (where == STATUS_RIGHT)
1417 				key = KEYC_SECONDCLICK3_STATUS_RIGHT;
1418 			if (where == STATUS_DEFAULT)
1419 				key = KEYC_SECONDCLICK3_STATUS_DEFAULT;
1420 			if (where == BORDER)
1421 				key = KEYC_SECONDCLICK3_BORDER;
1422 			break;
1423 		case MOUSE_BUTTON_6:
1424 			if (where == PANE)
1425 				key = KEYC_SECONDCLICK6_PANE;
1426 			if (where == STATUS)
1427 				key = KEYC_SECONDCLICK6_STATUS;
1428 			if (where == STATUS_LEFT)
1429 				key = KEYC_SECONDCLICK6_STATUS_LEFT;
1430 			if (where == STATUS_RIGHT)
1431 				key = KEYC_SECONDCLICK6_STATUS_RIGHT;
1432 			if (where == STATUS_DEFAULT)
1433 				key = KEYC_SECONDCLICK6_STATUS_DEFAULT;
1434 			if (where == BORDER)
1435 				key = KEYC_SECONDCLICK6_BORDER;
1436 			break;
1437 		case MOUSE_BUTTON_7:
1438 			if (where == PANE)
1439 				key = KEYC_SECONDCLICK7_PANE;
1440 			if (where == STATUS)
1441 				key = KEYC_SECONDCLICK7_STATUS;
1442 			if (where == STATUS_LEFT)
1443 				key = KEYC_SECONDCLICK7_STATUS_LEFT;
1444 			if (where == STATUS_RIGHT)
1445 				key = KEYC_SECONDCLICK7_STATUS_RIGHT;
1446 			if (where == STATUS_DEFAULT)
1447 				key = KEYC_SECONDCLICK7_STATUS_DEFAULT;
1448 			if (where == BORDER)
1449 				key = KEYC_SECONDCLICK7_BORDER;
1450 			break;
1451 		case MOUSE_BUTTON_8:
1452 			if (where == PANE)
1453 				key = KEYC_SECONDCLICK8_PANE;
1454 			if (where == STATUS)
1455 				key = KEYC_SECONDCLICK8_STATUS;
1456 			if (where == STATUS_LEFT)
1457 				key = KEYC_SECONDCLICK8_STATUS_LEFT;
1458 			if (where == STATUS_RIGHT)
1459 				key = KEYC_SECONDCLICK8_STATUS_RIGHT;
1460 			if (where == STATUS_DEFAULT)
1461 				key = KEYC_SECONDCLICK8_STATUS_DEFAULT;
1462 			if (where == BORDER)
1463 				key = KEYC_SECONDCLICK8_BORDER;
1464 			break;
1465 		case MOUSE_BUTTON_9:
1466 			if (where == PANE)
1467 				key = KEYC_SECONDCLICK9_PANE;
1468 			if (where == STATUS)
1469 				key = KEYC_SECONDCLICK9_STATUS;
1470 			if (where == STATUS_LEFT)
1471 				key = KEYC_SECONDCLICK9_STATUS_LEFT;
1472 			if (where == STATUS_RIGHT)
1473 				key = KEYC_SECONDCLICK9_STATUS_RIGHT;
1474 			if (where == STATUS_DEFAULT)
1475 				key = KEYC_SECONDCLICK9_STATUS_DEFAULT;
1476 			if (where == BORDER)
1477 				key = KEYC_SECONDCLICK9_BORDER;
1478 			break;
1479 		case MOUSE_BUTTON_10:
1480 			if (where == PANE)
1481 				key = KEYC_SECONDCLICK10_PANE;
1482 			if (where == STATUS)
1483 				key = KEYC_SECONDCLICK10_STATUS;
1484 			if (where == STATUS_LEFT)
1485 				key = KEYC_SECONDCLICK10_STATUS_LEFT;
1486 			if (where == STATUS_RIGHT)
1487 				key = KEYC_SECONDCLICK10_STATUS_RIGHT;
1488 			if (where == STATUS_DEFAULT)
1489 				key = KEYC_SECONDCLICK10_STATUS_DEFAULT;
1490 			if (where == BORDER)
1491 				key = KEYC_SECONDCLICK10_BORDER;
1492 			break;
1493 		case MOUSE_BUTTON_11:
1494 			if (where == PANE)
1495 				key = KEYC_SECONDCLICK11_PANE;
1496 			if (where == STATUS)
1497 				key = KEYC_SECONDCLICK11_STATUS;
1498 			if (where == STATUS_LEFT)
1499 				key = KEYC_SECONDCLICK11_STATUS_LEFT;
1500 			if (where == STATUS_RIGHT)
1501 				key = KEYC_SECONDCLICK11_STATUS_RIGHT;
1502 			if (where == STATUS_DEFAULT)
1503 				key = KEYC_SECONDCLICK11_STATUS_DEFAULT;
1504 			if (where == BORDER)
1505 				key = KEYC_SECONDCLICK11_BORDER;
1506 			break;
1507 		}
1508 		break;
1509 	case DOUBLE:
1510 		switch (MOUSE_BUTTONS(b)) {
1511 		case MOUSE_BUTTON_1:
1512 			if (where == PANE)
1513 				key = KEYC_DOUBLECLICK1_PANE;
1514 			if (where == STATUS)
1515 				key = KEYC_DOUBLECLICK1_STATUS;
1516 			if (where == STATUS_LEFT)
1517 				key = KEYC_DOUBLECLICK1_STATUS_LEFT;
1518 			if (where == STATUS_RIGHT)
1519 				key = KEYC_DOUBLECLICK1_STATUS_RIGHT;
1520 			if (where == STATUS_DEFAULT)
1521 				key = KEYC_DOUBLECLICK1_STATUS_DEFAULT;
1522 			if (where == BORDER)
1523 				key = KEYC_DOUBLECLICK1_BORDER;
1524 			break;
1525 		case MOUSE_BUTTON_2:
1526 			if (where == PANE)
1527 				key = KEYC_DOUBLECLICK2_PANE;
1528 			if (where == STATUS)
1529 				key = KEYC_DOUBLECLICK2_STATUS;
1530 			if (where == STATUS_LEFT)
1531 				key = KEYC_DOUBLECLICK2_STATUS_LEFT;
1532 			if (where == STATUS_RIGHT)
1533 				key = KEYC_DOUBLECLICK2_STATUS_RIGHT;
1534 			if (where == STATUS_DEFAULT)
1535 				key = KEYC_DOUBLECLICK2_STATUS_DEFAULT;
1536 			if (where == BORDER)
1537 				key = KEYC_DOUBLECLICK2_BORDER;
1538 			break;
1539 		case MOUSE_BUTTON_3:
1540 			if (where == PANE)
1541 				key = KEYC_DOUBLECLICK3_PANE;
1542 			if (where == STATUS)
1543 				key = KEYC_DOUBLECLICK3_STATUS;
1544 			if (where == STATUS_LEFT)
1545 				key = KEYC_DOUBLECLICK3_STATUS_LEFT;
1546 			if (where == STATUS_RIGHT)
1547 				key = KEYC_DOUBLECLICK3_STATUS_RIGHT;
1548 			if (where == STATUS_DEFAULT)
1549 				key = KEYC_DOUBLECLICK3_STATUS_DEFAULT;
1550 			if (where == BORDER)
1551 				key = KEYC_DOUBLECLICK3_BORDER;
1552 			break;
1553 		case MOUSE_BUTTON_6:
1554 			if (where == PANE)
1555 				key = KEYC_DOUBLECLICK6_PANE;
1556 			if (where == STATUS)
1557 				key = KEYC_DOUBLECLICK6_STATUS;
1558 			if (where == STATUS_LEFT)
1559 				key = KEYC_DOUBLECLICK6_STATUS_LEFT;
1560 			if (where == STATUS_RIGHT)
1561 				key = KEYC_DOUBLECLICK6_STATUS_RIGHT;
1562 			if (where == STATUS_DEFAULT)
1563 				key = KEYC_DOUBLECLICK6_STATUS_DEFAULT;
1564 			if (where == BORDER)
1565 				key = KEYC_DOUBLECLICK6_BORDER;
1566 			break;
1567 		case MOUSE_BUTTON_7:
1568 			if (where == PANE)
1569 				key = KEYC_DOUBLECLICK7_PANE;
1570 			if (where == STATUS)
1571 				key = KEYC_DOUBLECLICK7_STATUS;
1572 			if (where == STATUS_LEFT)
1573 				key = KEYC_DOUBLECLICK7_STATUS_LEFT;
1574 			if (where == STATUS_RIGHT)
1575 				key = KEYC_DOUBLECLICK7_STATUS_RIGHT;
1576 			if (where == STATUS_DEFAULT)
1577 				key = KEYC_DOUBLECLICK7_STATUS_DEFAULT;
1578 			if (where == BORDER)
1579 				key = KEYC_DOUBLECLICK7_BORDER;
1580 			break;
1581 		case MOUSE_BUTTON_8:
1582 			if (where == PANE)
1583 				key = KEYC_DOUBLECLICK8_PANE;
1584 			if (where == STATUS)
1585 				key = KEYC_DOUBLECLICK8_STATUS;
1586 			if (where == STATUS_LEFT)
1587 				key = KEYC_DOUBLECLICK8_STATUS_LEFT;
1588 			if (where == STATUS_RIGHT)
1589 				key = KEYC_DOUBLECLICK8_STATUS_RIGHT;
1590 			if (where == STATUS_DEFAULT)
1591 				key = KEYC_DOUBLECLICK8_STATUS_DEFAULT;
1592 			if (where == BORDER)
1593 				key = KEYC_DOUBLECLICK8_BORDER;
1594 			break;
1595 		case MOUSE_BUTTON_9:
1596 			if (where == PANE)
1597 				key = KEYC_DOUBLECLICK9_PANE;
1598 			if (where == STATUS)
1599 				key = KEYC_DOUBLECLICK9_STATUS;
1600 			if (where == STATUS_LEFT)
1601 				key = KEYC_DOUBLECLICK9_STATUS_LEFT;
1602 			if (where == STATUS_RIGHT)
1603 				key = KEYC_DOUBLECLICK9_STATUS_RIGHT;
1604 			if (where == STATUS_DEFAULT)
1605 				key = KEYC_DOUBLECLICK9_STATUS_DEFAULT;
1606 			if (where == BORDER)
1607 				key = KEYC_DOUBLECLICK9_BORDER;
1608 			break;
1609 		case MOUSE_BUTTON_10:
1610 			if (where == PANE)
1611 				key = KEYC_DOUBLECLICK10_PANE;
1612 			if (where == STATUS)
1613 				key = KEYC_DOUBLECLICK10_STATUS;
1614 			if (where == STATUS_LEFT)
1615 				key = KEYC_DOUBLECLICK10_STATUS_LEFT;
1616 			if (where == STATUS_RIGHT)
1617 				key = KEYC_DOUBLECLICK10_STATUS_RIGHT;
1618 			if (where == STATUS_DEFAULT)
1619 				key = KEYC_DOUBLECLICK10_STATUS_DEFAULT;
1620 			if (where == BORDER)
1621 				key = KEYC_DOUBLECLICK10_BORDER;
1622 			break;
1623 		case MOUSE_BUTTON_11:
1624 			if (where == PANE)
1625 				key = KEYC_DOUBLECLICK11_PANE;
1626 			if (where == STATUS)
1627 				key = KEYC_DOUBLECLICK11_STATUS;
1628 			if (where == STATUS_LEFT)
1629 				key = KEYC_DOUBLECLICK11_STATUS_LEFT;
1630 			if (where == STATUS_RIGHT)
1631 				key = KEYC_DOUBLECLICK11_STATUS_RIGHT;
1632 			if (where == STATUS_DEFAULT)
1633 				key = KEYC_DOUBLECLICK11_STATUS_DEFAULT;
1634 			if (where == BORDER)
1635 				key = KEYC_DOUBLECLICK11_BORDER;
1636 			break;
1637 		}
1638 		break;
1639 	case TRIPLE:
1640 		switch (MOUSE_BUTTONS(b)) {
1641 		case MOUSE_BUTTON_1:
1642 			if (where == PANE)
1643 				key = KEYC_TRIPLECLICK1_PANE;
1644 			if (where == STATUS)
1645 				key = KEYC_TRIPLECLICK1_STATUS;
1646 			if (where == STATUS_LEFT)
1647 				key = KEYC_TRIPLECLICK1_STATUS_LEFT;
1648 			if (where == STATUS_RIGHT)
1649 				key = KEYC_TRIPLECLICK1_STATUS_RIGHT;
1650 			if (where == STATUS_DEFAULT)
1651 				key = KEYC_TRIPLECLICK1_STATUS_DEFAULT;
1652 			if (where == BORDER)
1653 				key = KEYC_TRIPLECLICK1_BORDER;
1654 			break;
1655 		case MOUSE_BUTTON_2:
1656 			if (where == PANE)
1657 				key = KEYC_TRIPLECLICK2_PANE;
1658 			if (where == STATUS)
1659 				key = KEYC_TRIPLECLICK2_STATUS;
1660 			if (where == STATUS_LEFT)
1661 				key = KEYC_TRIPLECLICK2_STATUS_LEFT;
1662 			if (where == STATUS_RIGHT)
1663 				key = KEYC_TRIPLECLICK2_STATUS_RIGHT;
1664 			if (where == STATUS_DEFAULT)
1665 				key = KEYC_TRIPLECLICK2_STATUS_DEFAULT;
1666 			if (where == BORDER)
1667 				key = KEYC_TRIPLECLICK2_BORDER;
1668 			break;
1669 		case MOUSE_BUTTON_3:
1670 			if (where == PANE)
1671 				key = KEYC_TRIPLECLICK3_PANE;
1672 			if (where == STATUS)
1673 				key = KEYC_TRIPLECLICK3_STATUS;
1674 			if (where == STATUS_LEFT)
1675 				key = KEYC_TRIPLECLICK3_STATUS_LEFT;
1676 			if (where == STATUS_RIGHT)
1677 				key = KEYC_TRIPLECLICK3_STATUS_RIGHT;
1678 			if (where == STATUS_DEFAULT)
1679 				key = KEYC_TRIPLECLICK3_STATUS_DEFAULT;
1680 			if (where == BORDER)
1681 				key = KEYC_TRIPLECLICK3_BORDER;
1682 			break;
1683 		case MOUSE_BUTTON_6:
1684 			if (where == PANE)
1685 				key = KEYC_TRIPLECLICK6_PANE;
1686 			if (where == STATUS)
1687 				key = KEYC_TRIPLECLICK6_STATUS;
1688 			if (where == STATUS_LEFT)
1689 				key = KEYC_TRIPLECLICK6_STATUS_LEFT;
1690 			if (where == STATUS_RIGHT)
1691 				key = KEYC_TRIPLECLICK6_STATUS_RIGHT;
1692 			if (where == STATUS_DEFAULT)
1693 				key = KEYC_TRIPLECLICK6_STATUS_DEFAULT;
1694 			if (where == BORDER)
1695 				key = KEYC_TRIPLECLICK6_BORDER;
1696 			break;
1697 		case MOUSE_BUTTON_7:
1698 			if (where == PANE)
1699 				key = KEYC_TRIPLECLICK7_PANE;
1700 			if (where == STATUS)
1701 				key = KEYC_TRIPLECLICK7_STATUS;
1702 			if (where == STATUS_LEFT)
1703 				key = KEYC_TRIPLECLICK7_STATUS_LEFT;
1704 			if (where == STATUS_RIGHT)
1705 				key = KEYC_TRIPLECLICK7_STATUS_RIGHT;
1706 			if (where == STATUS_DEFAULT)
1707 				key = KEYC_TRIPLECLICK7_STATUS_DEFAULT;
1708 			if (where == BORDER)
1709 				key = KEYC_TRIPLECLICK7_BORDER;
1710 			break;
1711 		case MOUSE_BUTTON_8:
1712 			if (where == PANE)
1713 				key = KEYC_TRIPLECLICK8_PANE;
1714 			if (where == STATUS)
1715 				key = KEYC_TRIPLECLICK8_STATUS;
1716 			if (where == STATUS_LEFT)
1717 				key = KEYC_TRIPLECLICK8_STATUS_LEFT;
1718 			if (where == STATUS_RIGHT)
1719 				key = KEYC_TRIPLECLICK8_STATUS_RIGHT;
1720 			if (where == STATUS_DEFAULT)
1721 				key = KEYC_TRIPLECLICK8_STATUS_DEFAULT;
1722 			if (where == BORDER)
1723 				key = KEYC_TRIPLECLICK8_BORDER;
1724 			break;
1725 		case MOUSE_BUTTON_9:
1726 			if (where == PANE)
1727 				key = KEYC_TRIPLECLICK9_PANE;
1728 			if (where == STATUS)
1729 				key = KEYC_TRIPLECLICK9_STATUS;
1730 			if (where == STATUS_LEFT)
1731 				key = KEYC_TRIPLECLICK9_STATUS_LEFT;
1732 			if (where == STATUS_RIGHT)
1733 				key = KEYC_TRIPLECLICK9_STATUS_RIGHT;
1734 			if (where == STATUS_DEFAULT)
1735 				key = KEYC_TRIPLECLICK9_STATUS_DEFAULT;
1736 			if (where == BORDER)
1737 				key = KEYC_TRIPLECLICK9_BORDER;
1738 			break;
1739 		case MOUSE_BUTTON_10:
1740 			if (where == PANE)
1741 				key = KEYC_TRIPLECLICK10_PANE;
1742 			if (where == STATUS)
1743 				key = KEYC_TRIPLECLICK10_STATUS;
1744 			if (where == STATUS_LEFT)
1745 				key = KEYC_TRIPLECLICK10_STATUS_LEFT;
1746 			if (where == STATUS_RIGHT)
1747 				key = KEYC_TRIPLECLICK10_STATUS_RIGHT;
1748 			if (where == STATUS_DEFAULT)
1749 				key = KEYC_TRIPLECLICK10_STATUS_DEFAULT;
1750 			if (where == BORDER)
1751 				key = KEYC_TRIPLECLICK10_BORDER;
1752 			break;
1753 		case MOUSE_BUTTON_11:
1754 			if (where == PANE)
1755 				key = KEYC_TRIPLECLICK11_PANE;
1756 			if (where == STATUS)
1757 				key = KEYC_TRIPLECLICK11_STATUS;
1758 			if (where == STATUS_LEFT)
1759 				key = KEYC_TRIPLECLICK11_STATUS_LEFT;
1760 			if (where == STATUS_RIGHT)
1761 				key = KEYC_TRIPLECLICK11_STATUS_RIGHT;
1762 			if (where == STATUS_DEFAULT)
1763 				key = KEYC_TRIPLECLICK11_STATUS_DEFAULT;
1764 			if (where == BORDER)
1765 				key = KEYC_TRIPLECLICK11_BORDER;
1766 			break;
1767 		}
1768 		break;
1769 	}
1770 	if (key == KEYC_UNKNOWN)
1771 		return (KEYC_UNKNOWN);
1772 
1773 out:
1774 	/* Apply modifiers if any. */
1775 	if (b & MOUSE_MASK_META)
1776 		key |= KEYC_META;
1777 	if (b & MOUSE_MASK_CTRL)
1778 		key |= KEYC_CTRL;
1779 	if (b & MOUSE_MASK_SHIFT)
1780 		key |= KEYC_SHIFT;
1781 
1782 	if (log_get_level() != 0)
1783 		log_debug("mouse key is %s", key_string_lookup_key (key, 1));
1784 	return (key);
1785 }
1786 
1787 /* Is this a bracket paste key? */
1788 static int
1789 server_client_is_bracket_pasting(struct client *c, key_code key)
1790 {
1791 	if (key == KEYC_PASTE_START) {
1792 		c->flags |= CLIENT_BRACKETPASTING;
1793 		log_debug("%s: bracket paste on", c->name);
1794 		return (1);
1795 	}
1796 
1797 	if (key == KEYC_PASTE_END) {
1798 		c->flags &= ~CLIENT_BRACKETPASTING;
1799 		log_debug("%s: bracket paste off", c->name);
1800 		return (1);
1801 	}
1802 
1803 	return !!(c->flags & CLIENT_BRACKETPASTING);
1804 }
1805 
1806 /* Is this fast enough to probably be a paste? */
1807 static int
1808 server_client_assume_paste(struct session *s)
1809 {
1810 	struct timeval	tv;
1811 	int		t;
1812 
1813 	if ((t = options_get_number(s->options, "assume-paste-time")) == 0)
1814 		return (0);
1815 
1816 	timersub(&s->activity_time, &s->last_activity_time, &tv);
1817 	if (tv.tv_sec == 0 && tv.tv_usec < t * 1000) {
1818 		log_debug("session %s pasting (flag %d)", s->name,
1819 		    !!(s->flags & SESSION_PASTING));
1820 		if (s->flags & SESSION_PASTING)
1821 			return (1);
1822 		s->flags |= SESSION_PASTING;
1823 		return (0);
1824 	}
1825 	log_debug("session %s not pasting", s->name);
1826 	s->flags &= ~SESSION_PASTING;
1827 	return (0);
1828 }
1829 
1830 /* Has the latest client changed? */
1831 static void
1832 server_client_update_latest(struct client *c)
1833 {
1834 	struct window	*w;
1835 
1836 	if (c->session == NULL)
1837 		return;
1838 	w = c->session->curw->window;
1839 
1840 	if (w->latest == c)
1841 		return;
1842 	w->latest = c;
1843 
1844 	if (options_get_number(w->options, "window-size") == WINDOW_SIZE_LATEST)
1845 		recalculate_size(w, 0);
1846 
1847 	notify_client("client-active", c);
1848 }
1849 
1850 /*
1851  * Handle data key input from client. This owns and can modify the key event it
1852  * is given and is responsible for freeing it.
1853  */
1854 static enum cmd_retval
1855 server_client_key_callback(struct cmdq_item *item, void *data)
1856 {
1857 	struct client			*c = cmdq_get_client(item);
1858 	struct key_event		*event = data;
1859 	key_code			 key = event->key;
1860 	struct mouse_event		*m = &event->m;
1861 	struct session			*s = c->session;
1862 	struct winlink			*wl;
1863 	struct window_pane		*wp;
1864 	struct window_mode_entry	*wme;
1865 	struct timeval			 tv;
1866 	struct key_table		*table, *first;
1867 	struct key_binding		*bd;
1868 	int				 xtimeout, flags;
1869 	struct cmd_find_state		 fs;
1870 	key_code			 key0, prefix, prefix2;
1871 
1872 	/* Check the client is good to accept input. */
1873 	if (s == NULL || (c->flags & CLIENT_UNATTACHEDFLAGS))
1874 		goto out;
1875 	wl = s->curw;
1876 
1877 	/* Update the activity timer. */
1878 	if (gettimeofday(&c->activity_time, NULL) != 0)
1879 		fatal("gettimeofday failed");
1880 	session_update_activity(s, &c->activity_time);
1881 
1882 	/* Check for mouse keys. */
1883 	m->valid = 0;
1884 	if (key == KEYC_MOUSE || key == KEYC_DOUBLECLICK) {
1885 		if (c->flags & CLIENT_READONLY)
1886 			goto out;
1887 		key = server_client_check_mouse(c, event);
1888 		if (key == KEYC_UNKNOWN)
1889 			goto out;
1890 
1891 		m->valid = 1;
1892 		m->key = key;
1893 
1894 		/*
1895 		 * Mouse drag is in progress, so fire the callback (now that
1896 		 * the mouse event is valid).
1897 		 */
1898 		if ((key & KEYC_MASK_KEY) == KEYC_DRAGGING) {
1899 			c->tty.mouse_drag_update(c, m);
1900 			goto out;
1901 		}
1902 		event->key = key;
1903 	}
1904 
1905 	/* Find affected pane. */
1906 	if (!KEYC_IS_MOUSE(key) || cmd_find_from_mouse(&fs, m, 0) != 0)
1907 		cmd_find_from_client(&fs, c, 0);
1908 	wp = fs.wp;
1909 
1910 	/* Forward mouse keys if disabled. */
1911 	if (KEYC_IS_MOUSE(key) && !options_get_number(s->options, "mouse"))
1912 		goto forward_key;
1913 
1914 	/* Forward if bracket pasting. */
1915 	if (server_client_is_bracket_pasting(c, key))
1916 		goto forward_key;
1917 
1918 	/* Treat everything as a regular key when pasting is detected. */
1919 	if (!KEYC_IS_MOUSE(key) &&
1920 	    (~key & KEYC_SENT) &&
1921 	    server_client_assume_paste(s))
1922 		goto forward_key;
1923 
1924 	/*
1925 	 * Work out the current key table. If the pane is in a mode, use
1926 	 * the mode table instead of the default key table.
1927 	 */
1928 	if (server_client_is_default_key_table(c, c->keytable) &&
1929 	    wp != NULL &&
1930 	    (wme = TAILQ_FIRST(&wp->modes)) != NULL &&
1931 	    wme->mode->key_table != NULL)
1932 		table = key_bindings_get_table(wme->mode->key_table(wme), 1);
1933 	else
1934 		table = c->keytable;
1935 	first = table;
1936 
1937 table_changed:
1938 	/*
1939 	 * The prefix always takes precedence and forces a switch to the prefix
1940 	 * table, unless we are already there.
1941 	 */
1942 	prefix = (key_code)options_get_number(s->options, "prefix");
1943 	prefix2 = (key_code)options_get_number(s->options, "prefix2");
1944 	key0 = (key & (KEYC_MASK_KEY|KEYC_MASK_MODIFIERS));
1945 	if ((key0 == (prefix & (KEYC_MASK_KEY|KEYC_MASK_MODIFIERS)) ||
1946 	    key0 == (prefix2 & (KEYC_MASK_KEY|KEYC_MASK_MODIFIERS))) &&
1947 	    strcmp(table->name, "prefix") != 0) {
1948 		server_client_set_key_table(c, "prefix");
1949 		server_status_client(c);
1950 		goto out;
1951 	}
1952 	flags = c->flags;
1953 
1954 try_again:
1955 	/* Log key table. */
1956 	if (wp == NULL)
1957 		log_debug("key table %s (no pane)", table->name);
1958 	else
1959 		log_debug("key table %s (pane %%%u)", table->name, wp->id);
1960 	if (c->flags & CLIENT_REPEAT)
1961 		log_debug("currently repeating");
1962 
1963 	/* Try to see if there is a key binding in the current table. */
1964 	bd = key_bindings_get(table, key0);
1965 	if (bd != NULL) {
1966 		/*
1967 		 * Key was matched in this table. If currently repeating but a
1968 		 * non-repeating binding was found, stop repeating and try
1969 		 * again in the root table.
1970 		 */
1971 		if ((c->flags & CLIENT_REPEAT) &&
1972 		    (~bd->flags & KEY_BINDING_REPEAT)) {
1973 			log_debug("found in key table %s (not repeating)",
1974 			    table->name);
1975 			server_client_set_key_table(c, NULL);
1976 			first = table = c->keytable;
1977 			c->flags &= ~CLIENT_REPEAT;
1978 			server_status_client(c);
1979 			goto table_changed;
1980 		}
1981 		log_debug("found in key table %s", table->name);
1982 
1983 		/*
1984 		 * Take a reference to this table to make sure the key binding
1985 		 * doesn't disappear.
1986 		 */
1987 		table->references++;
1988 
1989 		/*
1990 		 * If this is a repeating key, start the timer. Otherwise reset
1991 		 * the client back to the root table.
1992 		 */
1993 		xtimeout = options_get_number(s->options, "repeat-time");
1994 		if (xtimeout != 0 && (bd->flags & KEY_BINDING_REPEAT)) {
1995 			c->flags |= CLIENT_REPEAT;
1996 
1997 			tv.tv_sec = xtimeout / 1000;
1998 			tv.tv_usec = (xtimeout % 1000) * 1000L;
1999 			evtimer_del(&c->repeat_timer);
2000 			evtimer_add(&c->repeat_timer, &tv);
2001 		} else {
2002 			c->flags &= ~CLIENT_REPEAT;
2003 			server_client_set_key_table(c, NULL);
2004 		}
2005 		server_status_client(c);
2006 
2007 		/* Execute the key binding. */
2008 		key_bindings_dispatch(bd, item, c, event, &fs);
2009 		key_bindings_unref_table(table);
2010 		goto out;
2011 	}
2012 
2013 	/*
2014 	 * No match, try the ANY key.
2015 	 */
2016 	if (key0 != KEYC_ANY) {
2017 		key0 = KEYC_ANY;
2018 		goto try_again;
2019 	}
2020 
2021 	/*
2022 	 * No match in this table. If not in the root table or if repeating,
2023 	 * switch the client back to the root table and try again.
2024 	 */
2025 	log_debug("not found in key table %s", table->name);
2026 	if (!server_client_is_default_key_table(c, table) ||
2027 	    (c->flags & CLIENT_REPEAT)) {
2028 		log_debug("trying in root table");
2029 		server_client_set_key_table(c, NULL);
2030 		table = c->keytable;
2031 		if (c->flags & CLIENT_REPEAT)
2032 			first = table;
2033 		c->flags &= ~CLIENT_REPEAT;
2034 		server_status_client(c);
2035 		goto table_changed;
2036 	}
2037 
2038 	/*
2039 	 * No match in the root table either. If this wasn't the first table
2040 	 * tried, don't pass the key to the pane.
2041 	 */
2042 	if (first != table && (~flags & CLIENT_REPEAT)) {
2043 		server_client_set_key_table(c, NULL);
2044 		server_status_client(c);
2045 		goto out;
2046 	}
2047 
2048 forward_key:
2049 	if (c->flags & CLIENT_READONLY)
2050 		goto out;
2051 	if (wp != NULL)
2052 		window_pane_key(wp, c, s, wl, key, m);
2053 
2054 out:
2055 	if (s != NULL && key != KEYC_FOCUS_OUT)
2056 		server_client_update_latest(c);
2057 	free(event);
2058 	return (CMD_RETURN_NORMAL);
2059 }
2060 
2061 /* Handle a key event. */
2062 int
2063 server_client_handle_key(struct client *c, struct key_event *event)
2064 {
2065 	struct session		*s = c->session;
2066 	struct cmdq_item	*item;
2067 
2068 	/* Check the client is good to accept input. */
2069 	if (s == NULL || (c->flags & CLIENT_UNATTACHEDFLAGS))
2070 		return (0);
2071 
2072 	/*
2073 	 * Key presses in overlay mode and the command prompt are a special
2074 	 * case. The queue might be blocked so they need to be processed
2075 	 * immediately rather than queued.
2076 	 */
2077 	if (~c->flags & CLIENT_READONLY) {
2078 		if (c->message_string != NULL) {
2079 			if (c->message_ignore_keys)
2080 				return (0);
2081 			status_message_clear(c);
2082 		}
2083 		if (c->overlay_key != NULL) {
2084 			switch (c->overlay_key(c, c->overlay_data, event)) {
2085 			case 0:
2086 				return (0);
2087 			case 1:
2088 				server_client_clear_overlay(c);
2089 				return (0);
2090 			}
2091 		}
2092 		server_client_clear_overlay(c);
2093 		if (c->prompt_string != NULL) {
2094 			if (status_prompt_key(c, event->key) == 0)
2095 				return (0);
2096 		}
2097 	}
2098 
2099 	/*
2100 	 * Add the key to the queue so it happens after any commands queued by
2101 	 * previous keys.
2102 	 */
2103 	item = cmdq_get_callback(server_client_key_callback, event);
2104 	cmdq_append(c, item);
2105 	return (1);
2106 }
2107 
2108 /* Client functions that need to happen every loop. */
2109 void
2110 server_client_loop(void)
2111 {
2112 	struct client		*c;
2113 	struct window		*w;
2114 	struct window_pane	*wp;
2115 
2116 	/* Check for window resize. This is done before redrawing. */
2117 	RB_FOREACH(w, windows, &windows)
2118 		server_client_check_window_resize(w);
2119 
2120 	/* Check clients. */
2121 	TAILQ_FOREACH(c, &clients, entry) {
2122 		server_client_check_exit(c);
2123 		if (c->session != NULL) {
2124 			server_client_check_modes(c);
2125 			server_client_check_redraw(c);
2126 			server_client_reset_state(c);
2127 		}
2128 	}
2129 
2130 	/*
2131 	 * Any windows will have been redrawn as part of clients, so clear
2132 	 * their flags now.
2133 	 */
2134 	RB_FOREACH(w, windows, &windows) {
2135 		TAILQ_FOREACH(wp, &w->panes, entry) {
2136 			if (wp->fd != -1) {
2137 				server_client_check_pane_resize(wp);
2138 				server_client_check_pane_buffer(wp);
2139 			}
2140 			wp->flags &= ~PANE_REDRAW;
2141 		}
2142 		check_window_name(w);
2143 	}
2144 }
2145 
2146 /* Check if window needs to be resized. */
2147 static void
2148 server_client_check_window_resize(struct window *w)
2149 {
2150 	struct winlink	*wl;
2151 
2152 	if (~w->flags & WINDOW_RESIZE)
2153 		return;
2154 
2155 	TAILQ_FOREACH(wl, &w->winlinks, wentry) {
2156 		if (wl->session->attached != 0 && wl->session->curw == wl)
2157 			break;
2158 	}
2159 	if (wl == NULL)
2160 		return;
2161 
2162 	log_debug("%s: resizing window @%u", __func__, w->id);
2163 	resize_window(w, w->new_sx, w->new_sy, w->new_xpixel, w->new_ypixel);
2164 }
2165 
2166 /* Resize timer event. */
2167 static void
2168 server_client_resize_timer(__unused int fd, __unused short events, void *data)
2169 {
2170 	struct window_pane	*wp = data;
2171 
2172 	log_debug("%s: %%%u resize timer expired", __func__, wp->id);
2173 	evtimer_del(&wp->resize_timer);
2174 }
2175 
2176 /* Check if pane should be resized. */
2177 static void
2178 server_client_check_pane_resize(struct window_pane *wp)
2179 {
2180 	struct window_pane_resize	*r;
2181 	struct window_pane_resize	*r1;
2182 	struct window_pane_resize	*first;
2183 	struct window_pane_resize	*last;
2184 	struct timeval			 tv = { .tv_usec = 250000 };
2185 
2186 	if (TAILQ_EMPTY(&wp->resize_queue))
2187 		return;
2188 
2189 	if (!event_initialized(&wp->resize_timer))
2190 		evtimer_set(&wp->resize_timer, server_client_resize_timer, wp);
2191 	if (evtimer_pending(&wp->resize_timer, NULL))
2192 		return;
2193 
2194 	log_debug("%s: %%%u needs to be resized", __func__, wp->id);
2195 	TAILQ_FOREACH(r, &wp->resize_queue, entry) {
2196 		log_debug("queued resize: %ux%u -> %ux%u", r->osx, r->osy,
2197 		    r->sx, r->sy);
2198 	}
2199 
2200 	/*
2201 	 * There are three cases that matter:
2202 	 *
2203 	 * - Only one resize. It can just be applied.
2204 	 *
2205 	 * - Multiple resizes and the ending size is different from the
2206 	 *   starting size. We can discard all resizes except the most recent.
2207 	 *
2208 	 * - Multiple resizes and the ending size is the same as the starting
2209 	 *   size. We must resize at least twice to force the application to
2210 	 *   redraw. So apply the first and leave the last on the queue for
2211 	 *   next time.
2212 	 */
2213 	first = TAILQ_FIRST(&wp->resize_queue);
2214 	last = TAILQ_LAST(&wp->resize_queue, window_pane_resizes);
2215 	if (first == last) {
2216 		/* Only one resize. */
2217 		window_pane_send_resize(wp, first->sx, first->sy);
2218 		TAILQ_REMOVE(&wp->resize_queue, first, entry);
2219 		free(first);
2220 	} else if (last->sx != first->osx || last->sy != first->osy) {
2221 		/* Multiple resizes ending up with a different size. */
2222 		window_pane_send_resize(wp, last->sx, last->sy);
2223 		TAILQ_FOREACH_SAFE(r, &wp->resize_queue, entry, r1) {
2224 			TAILQ_REMOVE(&wp->resize_queue, r, entry);
2225 			free(r);
2226 		}
2227 	} else {
2228 		/*
2229 		 * Multiple resizes ending up with the same size. There will
2230 		 * not be more than one to the same size in succession so we
2231 		 * can just use the last-but-one on the list and leave the last
2232 		 * for later. We reduce the time until the next check to avoid
2233 		 * a long delay between the resizes.
2234 		 */
2235 		r = TAILQ_PREV(last, window_pane_resizes, entry);
2236 		window_pane_send_resize(wp, r->sx, r->sy);
2237 		TAILQ_FOREACH_SAFE(r, &wp->resize_queue, entry, r1) {
2238 			if (r == last)
2239 				break;
2240 			TAILQ_REMOVE(&wp->resize_queue, r, entry);
2241 			free(r);
2242 		}
2243 		tv.tv_usec = 10000;
2244 	}
2245 	evtimer_add(&wp->resize_timer, &tv);
2246 }
2247 
2248 /* Check pane buffer size. */
2249 static void
2250 server_client_check_pane_buffer(struct window_pane *wp)
2251 {
2252 	struct evbuffer			*evb = wp->event->input;
2253 	size_t				 minimum;
2254 	struct client			*c;
2255 	struct window_pane_offset	*wpo;
2256 	int				 off = 1, flag;
2257 	u_int				 attached_clients = 0;
2258 	size_t				 new_size;
2259 
2260 	/*
2261 	 * Work out the minimum used size. This is the most that can be removed
2262 	 * from the buffer.
2263 	 */
2264 	minimum = wp->offset.used;
2265 	if (wp->pipe_fd != -1 && wp->pipe_offset.used < minimum)
2266 		minimum = wp->pipe_offset.used;
2267 	TAILQ_FOREACH(c, &clients, entry) {
2268 		if (c->session == NULL)
2269 			continue;
2270 		attached_clients++;
2271 
2272 		if (~c->flags & CLIENT_CONTROL) {
2273 			off = 0;
2274 			continue;
2275 		}
2276 		wpo = control_pane_offset(c, wp, &flag);
2277 		if (wpo == NULL) {
2278 			if (!flag)
2279 				off = 0;
2280 			continue;
2281 		}
2282 		if (!flag)
2283 			off = 0;
2284 
2285 		window_pane_get_new_data(wp, wpo, &new_size);
2286 		log_debug("%s: %s has %zu bytes used and %zu left for %%%u",
2287 		    __func__, c->name, wpo->used - wp->base_offset, new_size,
2288 		    wp->id);
2289 		if (wpo->used < minimum)
2290 			minimum = wpo->used;
2291 	}
2292 	if (attached_clients == 0)
2293 		off = 0;
2294 	minimum -= wp->base_offset;
2295 	if (minimum == 0)
2296 		goto out;
2297 
2298 	/* Drain the buffer. */
2299 	log_debug("%s: %%%u has %zu minimum (of %zu) bytes used", __func__,
2300 	    wp->id, minimum, EVBUFFER_LENGTH(evb));
2301 	evbuffer_drain(evb, minimum);
2302 
2303 	/*
2304 	 * Adjust the base offset. If it would roll over, all the offsets into
2305 	 * the buffer need to be adjusted.
2306 	 */
2307 	if (wp->base_offset > SIZE_MAX - minimum) {
2308 		log_debug("%s: %%%u base offset has wrapped", __func__, wp->id);
2309 		wp->offset.used -= wp->base_offset;
2310 		if (wp->pipe_fd != -1)
2311 			wp->pipe_offset.used -= wp->base_offset;
2312 		TAILQ_FOREACH(c, &clients, entry) {
2313 			if (c->session == NULL || (~c->flags & CLIENT_CONTROL))
2314 				continue;
2315 			wpo = control_pane_offset(c, wp, &flag);
2316 			if (wpo != NULL && !flag)
2317 				wpo->used -= wp->base_offset;
2318 		}
2319 		wp->base_offset = minimum;
2320 	} else
2321 		wp->base_offset += minimum;
2322 
2323 out:
2324 	/*
2325 	 * If there is data remaining, and there are no clients able to consume
2326 	 * it, do not read any more. This is true when there are attached
2327 	 * clients, all of which are control clients which are not able to
2328 	 * accept any more data.
2329 	 */
2330 	log_debug("%s: pane %%%u is %s", __func__, wp->id, off ? "off" : "on");
2331 	if (off)
2332 		bufferevent_disable(wp->event, EV_READ);
2333 	else
2334 		bufferevent_enable(wp->event, EV_READ);
2335 }
2336 
2337 /*
2338  * Update cursor position and mode settings. The scroll region and attributes
2339  * are cleared when idle (waiting for an event) as this is the most likely time
2340  * a user may interrupt tmux, for example with ~^Z in ssh(1). This is a
2341  * compromise between excessive resets and likelihood of an interrupt.
2342  *
2343  * tty_region/tty_reset/tty_update_mode already take care of not resetting
2344  * things that are already in their default state.
2345  */
2346 static void
2347 server_client_reset_state(struct client *c)
2348 {
2349 	struct tty		*tty = &c->tty;
2350 	struct window		*w = c->session->curw->window;
2351 	struct window_pane	*wp = server_client_get_pane(c), *loop;
2352 	struct screen		*s = NULL;
2353 	struct options		*oo = c->session->options;
2354 	int			 mode = 0, cursor, flags, n;
2355 	u_int			 cx = 0, cy = 0, ox, oy, sx, sy;
2356 
2357 	if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED))
2358 		return;
2359 
2360 	/* Disable the block flag. */
2361 	flags = (tty->flags & TTY_BLOCK);
2362 	tty->flags &= ~TTY_BLOCK;
2363 
2364 	/* Get mode from overlay if any, else from screen. */
2365 	if (c->overlay_draw != NULL) {
2366 		if (c->overlay_mode != NULL)
2367 			s = c->overlay_mode(c, c->overlay_data, &cx, &cy);
2368 	} else
2369 		s = wp->screen;
2370 	if (s != NULL)
2371 		mode = s->mode;
2372 	if (log_get_level() != 0) {
2373 		log_debug("%s: client %s mode %s", __func__, c->name,
2374 		    screen_mode_to_string(mode));
2375 	}
2376 
2377 	/* Reset region and margin. */
2378 	tty_region_off(tty);
2379 	tty_margin_off(tty);
2380 
2381 	/* Move cursor to pane cursor and offset. */
2382 	if (c->prompt_string != NULL) {
2383 		n = options_get_number(c->session->options, "status-position");
2384 		if (n == 0)
2385 			cy = 0;
2386 		else {
2387 			n = status_line_size(c);
2388 			if (n == 0)
2389 				cy = tty->sy - 1;
2390 			else
2391 				cy = tty->sy - n;
2392 		}
2393 		cx = c->prompt_cursor;
2394 		mode &= ~MODE_CURSOR;
2395 	} else if (c->overlay_draw == NULL) {
2396 		cursor = 0;
2397 		tty_window_offset(tty, &ox, &oy, &sx, &sy);
2398 		if (wp->xoff + s->cx >= ox && wp->xoff + s->cx <= ox + sx &&
2399 		    wp->yoff + s->cy >= oy && wp->yoff + s->cy <= oy + sy) {
2400 			cursor = 1;
2401 
2402 			cx = wp->xoff + s->cx - ox;
2403 			cy = wp->yoff + s->cy - oy;
2404 
2405 			if (status_at_line(c) == 0)
2406 				cy += status_line_size(c);
2407 		}
2408 		if (!cursor)
2409 			mode &= ~MODE_CURSOR;
2410 	}
2411 	log_debug("%s: cursor to %u,%u", __func__, cx, cy);
2412 	tty_cursor(tty, cx, cy);
2413 
2414 	/*
2415 	 * Set mouse mode if requested. To support dragging, always use button
2416 	 * mode.
2417 	 */
2418 	if (options_get_number(oo, "mouse")) {
2419 		if (c->overlay_draw == NULL) {
2420 			mode &= ~ALL_MOUSE_MODES;
2421 			TAILQ_FOREACH(loop, &w->panes, entry) {
2422 				if (loop->screen->mode & MODE_MOUSE_ALL)
2423 					mode |= MODE_MOUSE_ALL;
2424 			}
2425 		}
2426 		if (~mode & MODE_MOUSE_ALL)
2427 			mode |= MODE_MOUSE_BUTTON;
2428 	}
2429 
2430 	/* Clear bracketed paste mode if at the prompt. */
2431 	if (c->overlay_draw == NULL && c->prompt_string != NULL)
2432 		mode &= ~MODE_BRACKETPASTE;
2433 
2434 	/* Set the terminal mode and reset attributes. */
2435 	tty_update_mode(tty, mode, s);
2436 	tty_reset(tty);
2437 
2438 	/* All writing must be done, send a sync end (if it was started). */
2439 	tty_sync_end(tty);
2440 	tty->flags |= flags;
2441 }
2442 
2443 /* Repeat time callback. */
2444 static void
2445 server_client_repeat_timer(__unused int fd, __unused short events, void *data)
2446 {
2447 	struct client	*c = data;
2448 
2449 	if (c->flags & CLIENT_REPEAT) {
2450 		server_client_set_key_table(c, NULL);
2451 		c->flags &= ~CLIENT_REPEAT;
2452 		server_status_client(c);
2453 	}
2454 }
2455 
2456 /* Double-click callback. */
2457 static void
2458 server_client_click_timer(__unused int fd, __unused short events, void *data)
2459 {
2460 	struct client		*c = data;
2461 	struct key_event	*event;
2462 
2463 	log_debug("click timer expired");
2464 
2465 	if (c->flags & CLIENT_TRIPLECLICK) {
2466 		/*
2467 		 * Waiting for a third click that hasn't happened, so this must
2468 		 * have been a double click.
2469 		 */
2470 		event = xmalloc(sizeof *event);
2471 		event->key = KEYC_DOUBLECLICK;
2472 		memcpy(&event->m, &c->click_event, sizeof event->m);
2473 		if (!server_client_handle_key(c, event))
2474 			free(event);
2475 	}
2476 	c->flags &= ~(CLIENT_DOUBLECLICK|CLIENT_TRIPLECLICK);
2477 }
2478 
2479 /* Check if client should be exited. */
2480 static void
2481 server_client_check_exit(struct client *c)
2482 {
2483 	struct client_file	*cf;
2484 	const char		*name = c->exit_session;
2485 	char			*data;
2486 	size_t			 size, msize;
2487 
2488 	if (c->flags & (CLIENT_DEAD|CLIENT_EXITED))
2489 		return;
2490 	if (~c->flags & CLIENT_EXIT)
2491 		return;
2492 
2493 	if (c->flags & CLIENT_CONTROL) {
2494 		control_discard(c);
2495 		if (!control_all_done(c))
2496 			return;
2497 	}
2498 	RB_FOREACH(cf, client_files, &c->files) {
2499 		if (EVBUFFER_LENGTH(cf->buffer) != 0)
2500 			return;
2501 	}
2502 	c->flags |= CLIENT_EXITED;
2503 
2504 	switch (c->exit_type) {
2505 	case CLIENT_EXIT_RETURN:
2506 		if (c->exit_message != NULL)
2507 			msize = strlen(c->exit_message) + 1;
2508 		else
2509 			msize = 0;
2510 		size = (sizeof c->retval) + msize;
2511 		data = xmalloc(size);
2512 		memcpy(data, &c->retval, sizeof c->retval);
2513 		if (c->exit_message != NULL)
2514 			memcpy(data + sizeof c->retval, c->exit_message, msize);
2515 		proc_send(c->peer, MSG_EXIT, -1, data, size);
2516 		free(data);
2517 		break;
2518 	case CLIENT_EXIT_SHUTDOWN:
2519 		proc_send(c->peer, MSG_SHUTDOWN, -1, NULL, 0);
2520 		break;
2521 	case CLIENT_EXIT_DETACH:
2522 		proc_send(c->peer, c->exit_msgtype, -1, name, strlen(name) + 1);
2523 		break;
2524 	}
2525 	free(c->exit_session);
2526 	free(c->exit_message);
2527 }
2528 
2529 /* Redraw timer callback. */
2530 static void
2531 server_client_redraw_timer(__unused int fd, __unused short events,
2532     __unused void *data)
2533 {
2534 	log_debug("redraw timer fired");
2535 }
2536 
2537 /*
2538  * Check if modes need to be updated. Only modes in the current window are
2539  * updated and it is done when the status line is redrawn.
2540  */
2541 static void
2542 server_client_check_modes(struct client *c)
2543 {
2544 	struct window			*w = c->session->curw->window;
2545 	struct window_pane		*wp;
2546 	struct window_mode_entry	*wme;
2547 
2548 	if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED))
2549 		return;
2550 	if (~c->flags & CLIENT_REDRAWSTATUS)
2551 		return;
2552 	TAILQ_FOREACH(wp, &w->panes, entry) {
2553 		wme = TAILQ_FIRST(&wp->modes);
2554 		if (wme != NULL && wme->mode->update != NULL)
2555 			wme->mode->update(wme);
2556 	}
2557 }
2558 
2559 /* Check for client redraws. */
2560 static void
2561 server_client_check_redraw(struct client *c)
2562 {
2563 	struct session		*s = c->session;
2564 	struct tty		*tty = &c->tty;
2565 	struct window		*w = c->session->curw->window;
2566 	struct window_pane	*wp;
2567 	int			 needed, flags, mode = tty->mode, new_flags = 0;
2568 	int			 redraw;
2569 	u_int			 bit = 0;
2570 	struct timeval		 tv = { .tv_usec = 1000 };
2571 	static struct event	 ev;
2572 	size_t			 left;
2573 
2574 	if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED))
2575 		return;
2576 	if (c->flags & CLIENT_ALLREDRAWFLAGS) {
2577 		log_debug("%s: redraw%s%s%s%s%s", c->name,
2578 		    (c->flags & CLIENT_REDRAWWINDOW) ? " window" : "",
2579 		    (c->flags & CLIENT_REDRAWSTATUS) ? " status" : "",
2580 		    (c->flags & CLIENT_REDRAWBORDERS) ? " borders" : "",
2581 		    (c->flags & CLIENT_REDRAWOVERLAY) ? " overlay" : "",
2582 		    (c->flags & CLIENT_REDRAWPANES) ? " panes" : "");
2583 	}
2584 
2585 	/*
2586 	 * If there is outstanding data, defer the redraw until it has been
2587 	 * consumed. We can just add a timer to get out of the event loop and
2588 	 * end up back here.
2589 	 */
2590 	needed = 0;
2591 	if (c->flags & CLIENT_ALLREDRAWFLAGS)
2592 		needed = 1;
2593 	else {
2594 		TAILQ_FOREACH(wp, &w->panes, entry) {
2595 			if (wp->flags & PANE_REDRAW) {
2596 				needed = 1;
2597 				break;
2598 			}
2599 		}
2600 		if (needed)
2601 			new_flags |= CLIENT_REDRAWPANES;
2602 	}
2603 	if (needed && (left = EVBUFFER_LENGTH(tty->out)) != 0) {
2604 		log_debug("%s: redraw deferred (%zu left)", c->name, left);
2605 		if (!evtimer_initialized(&ev))
2606 			evtimer_set(&ev, server_client_redraw_timer, NULL);
2607 		if (!evtimer_pending(&ev, NULL)) {
2608 			log_debug("redraw timer started");
2609 			evtimer_add(&ev, &tv);
2610 		}
2611 
2612 		if (~c->flags & CLIENT_REDRAWWINDOW) {
2613 			TAILQ_FOREACH(wp, &w->panes, entry) {
2614 				if (wp->flags & PANE_REDRAW) {
2615 					log_debug("%s: pane %%%u needs redraw",
2616 					    c->name, wp->id);
2617 					c->redraw_panes |= (1 << bit);
2618 				}
2619 				if (++bit == 64) {
2620 					/*
2621 					 * If more that 64 panes, give up and
2622 					 * just redraw the window.
2623 					 */
2624 					new_flags &= CLIENT_REDRAWPANES;
2625 					new_flags |= CLIENT_REDRAWWINDOW;
2626 					break;
2627 				}
2628 			}
2629 			if (c->redraw_panes != 0)
2630 				c->flags |= CLIENT_REDRAWPANES;
2631 		}
2632 		c->flags |= new_flags;
2633 		return;
2634 	} else if (needed)
2635 		log_debug("%s: redraw needed", c->name);
2636 
2637 	flags = tty->flags & (TTY_BLOCK|TTY_FREEZE|TTY_NOCURSOR);
2638 	tty->flags = (tty->flags & ~(TTY_BLOCK|TTY_FREEZE))|TTY_NOCURSOR;
2639 
2640 	if (~c->flags & CLIENT_REDRAWWINDOW) {
2641 		/*
2642 		 * If not redrawing the entire window, check whether each pane
2643 		 * needs to be redrawn.
2644 		 */
2645 		TAILQ_FOREACH(wp, &w->panes, entry) {
2646 			redraw = 0;
2647 			if (wp->flags & PANE_REDRAW)
2648 				redraw = 1;
2649 			else if (c->flags & CLIENT_REDRAWPANES)
2650 				redraw = !!(c->redraw_panes & (1 << bit));
2651 			bit++;
2652 			if (!redraw)
2653 				continue;
2654 			log_debug("%s: redrawing pane %%%u", __func__, wp->id);
2655 			screen_redraw_pane(c, wp);
2656 		}
2657 		c->redraw_panes = 0;
2658 		c->flags &= ~CLIENT_REDRAWPANES;
2659 	}
2660 
2661 	if (c->flags & CLIENT_ALLREDRAWFLAGS) {
2662 		if (options_get_number(s->options, "set-titles")) {
2663 			server_client_set_title(c);
2664 			server_client_set_path(c);
2665 		}
2666 		screen_redraw_screen(c);
2667 	}
2668 
2669 	tty->flags = (tty->flags & ~TTY_NOCURSOR)|(flags & TTY_NOCURSOR);
2670 	tty_update_mode(tty, mode, NULL);
2671 	tty->flags = (tty->flags & ~(TTY_BLOCK|TTY_FREEZE|TTY_NOCURSOR))|flags;
2672 
2673 	c->flags &= ~(CLIENT_ALLREDRAWFLAGS|CLIENT_STATUSFORCE);
2674 
2675 	if (needed) {
2676 		/*
2677 		 * We would have deferred the redraw unless the output buffer
2678 		 * was empty, so we can record how many bytes the redraw
2679 		 * generated.
2680 		 */
2681 		c->redraw = EVBUFFER_LENGTH(tty->out);
2682 		log_debug("%s: redraw added %zu bytes", c->name, c->redraw);
2683 	}
2684 }
2685 
2686 /* Set client title. */
2687 static void
2688 server_client_set_title(struct client *c)
2689 {
2690 	struct session		*s = c->session;
2691 	const char		*template;
2692 	char			*title;
2693 	struct format_tree	*ft;
2694 
2695 	template = options_get_string(s->options, "set-titles-string");
2696 
2697 	ft = format_create(c, NULL, FORMAT_NONE, 0);
2698 	format_defaults(ft, c, NULL, NULL, NULL);
2699 
2700 	title = format_expand_time(ft, template);
2701 	if (c->title == NULL || strcmp(title, c->title) != 0) {
2702 		free(c->title);
2703 		c->title = xstrdup(title);
2704 		tty_set_title(&c->tty, c->title);
2705 	}
2706 	free(title);
2707 
2708 	format_free(ft);
2709 }
2710 
2711 /* Set client path. */
2712 static void
2713 server_client_set_path(struct client *c)
2714 {
2715 	struct session	*s = c->session;
2716 	const char	*path;
2717 
2718 	if (s->curw == NULL)
2719 		return;
2720 	if (s->curw->window->active->base.path == NULL)
2721 		path = "";
2722 	else
2723 		path = s->curw->window->active->base.path;
2724 	if (c->path == NULL || strcmp(path, c->path) != 0) {
2725 		free(c->path);
2726 		c->path = xstrdup(path);
2727 		tty_set_path(&c->tty, c->path);
2728 	}
2729 }
2730 
2731 /* Dispatch message from client. */
2732 static void
2733 server_client_dispatch(struct imsg *imsg, void *arg)
2734 {
2735 	struct client	*c = arg;
2736 	ssize_t		 datalen;
2737 	struct session	*s;
2738 
2739 	if (c->flags & CLIENT_DEAD)
2740 		return;
2741 
2742 	if (imsg == NULL) {
2743 		server_client_lost(c);
2744 		return;
2745 	}
2746 
2747 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
2748 
2749 	switch (imsg->hdr.type) {
2750 	case MSG_IDENTIFY_CLIENTPID:
2751 	case MSG_IDENTIFY_CWD:
2752 	case MSG_IDENTIFY_ENVIRON:
2753 	case MSG_IDENTIFY_FEATURES:
2754 	case MSG_IDENTIFY_FLAGS:
2755 	case MSG_IDENTIFY_LONGFLAGS:
2756 	case MSG_IDENTIFY_STDIN:
2757 	case MSG_IDENTIFY_STDOUT:
2758 	case MSG_IDENTIFY_TERM:
2759 	case MSG_IDENTIFY_TERMINFO:
2760 	case MSG_IDENTIFY_TTYNAME:
2761 	case MSG_IDENTIFY_DONE:
2762 		server_client_dispatch_identify(c, imsg);
2763 		break;
2764 	case MSG_COMMAND:
2765 		server_client_dispatch_command(c, imsg);
2766 		break;
2767 	case MSG_RESIZE:
2768 		if (datalen != 0)
2769 			fatalx("bad MSG_RESIZE size");
2770 
2771 		if (c->flags & CLIENT_CONTROL)
2772 			break;
2773 		server_client_update_latest(c);
2774 		tty_resize(&c->tty);
2775 		tty_repeat_requests(&c->tty);
2776 		recalculate_sizes();
2777 		if (c->overlay_resize == NULL)
2778 			server_client_clear_overlay(c);
2779 		else
2780 			c->overlay_resize(c, c->overlay_data);
2781 		server_redraw_client(c);
2782 		if (c->session != NULL)
2783 			notify_client("client-resized", c);
2784 		break;
2785 	case MSG_EXITING:
2786 		if (datalen != 0)
2787 			fatalx("bad MSG_EXITING size");
2788 		server_client_set_session(c, NULL);
2789 		recalculate_sizes();
2790 		tty_close(&c->tty);
2791 		proc_send(c->peer, MSG_EXITED, -1, NULL, 0);
2792 		break;
2793 	case MSG_WAKEUP:
2794 	case MSG_UNLOCK:
2795 		if (datalen != 0)
2796 			fatalx("bad MSG_WAKEUP size");
2797 
2798 		if (!(c->flags & CLIENT_SUSPENDED))
2799 			break;
2800 		c->flags &= ~CLIENT_SUSPENDED;
2801 
2802 		if (c->fd == -1 || c->session == NULL) /* exited already */
2803 			break;
2804 		s = c->session;
2805 
2806 		if (gettimeofday(&c->activity_time, NULL) != 0)
2807 			fatal("gettimeofday failed");
2808 
2809 		tty_start_tty(&c->tty);
2810 		server_redraw_client(c);
2811 		recalculate_sizes();
2812 
2813 		if (s != NULL)
2814 			session_update_activity(s, &c->activity_time);
2815 		break;
2816 	case MSG_SHELL:
2817 		if (datalen != 0)
2818 			fatalx("bad MSG_SHELL size");
2819 
2820 		server_client_dispatch_shell(c);
2821 		break;
2822 	case MSG_WRITE_READY:
2823 		file_write_ready(&c->files, imsg);
2824 		break;
2825 	case MSG_READ:
2826 		file_read_data(&c->files, imsg);
2827 		break;
2828 	case MSG_READ_DONE:
2829 		file_read_done(&c->files, imsg);
2830 		break;
2831 	}
2832 }
2833 
2834 /* Callback when command is not allowed. */
2835 static enum cmd_retval
2836 server_client_read_only(struct cmdq_item *item, __unused void *data)
2837 {
2838 	cmdq_error(item, "client is read-only");
2839 	return (CMD_RETURN_ERROR);
2840 }
2841 
2842 /* Callback when command is done. */
2843 static enum cmd_retval
2844 server_client_command_done(struct cmdq_item *item, __unused void *data)
2845 {
2846 	struct client	*c = cmdq_get_client(item);
2847 
2848 	if (~c->flags & CLIENT_ATTACHED)
2849 		c->flags |= CLIENT_EXIT;
2850 	else if (~c->flags & CLIENT_EXIT) {
2851 		if (c->flags & CLIENT_CONTROL)
2852 			control_ready(c);
2853 		tty_send_requests(&c->tty);
2854 	}
2855 	return (CMD_RETURN_NORMAL);
2856 }
2857 
2858 /* Handle command message. */
2859 static void
2860 server_client_dispatch_command(struct client *c, struct imsg *imsg)
2861 {
2862 	struct msg_command	  data;
2863 	char			 *buf;
2864 	size_t			  len;
2865 	int			  argc;
2866 	char			**argv, *cause;
2867 	struct cmd_parse_result	 *pr;
2868 	struct args_value	 *values;
2869 	struct cmdq_item	 *new_item;
2870 
2871 	if (c->flags & CLIENT_EXIT)
2872 		return;
2873 
2874 	if (imsg->hdr.len - IMSG_HEADER_SIZE < sizeof data)
2875 		fatalx("bad MSG_COMMAND size");
2876 	memcpy(&data, imsg->data, sizeof data);
2877 
2878 	buf = (char *)imsg->data + sizeof data;
2879 	len = imsg->hdr.len  - IMSG_HEADER_SIZE - sizeof data;
2880 	if (len > 0 && buf[len - 1] != '\0')
2881 		fatalx("bad MSG_COMMAND string");
2882 
2883 	argc = data.argc;
2884 	if (cmd_unpack_argv(buf, len, argc, &argv) != 0) {
2885 		cause = xstrdup("command too long");
2886 		goto error;
2887 	}
2888 
2889 	if (argc == 0) {
2890 		argc = 1;
2891 		argv = xcalloc(1, sizeof *argv);
2892 		*argv = xstrdup("new-session");
2893 	}
2894 
2895 	values = args_from_vector(argc, argv);
2896 	pr = cmd_parse_from_arguments(values, argc, NULL);
2897 	switch (pr->status) {
2898 	case CMD_PARSE_ERROR:
2899 		cause = pr->error;
2900 		goto error;
2901 	case CMD_PARSE_SUCCESS:
2902 		break;
2903 	}
2904 	args_free_values(values, argc);
2905 	free(values);
2906 	cmd_free_argv(argc, argv);
2907 
2908 	if ((c->flags & CLIENT_READONLY) &&
2909 	    !cmd_list_all_have(pr->cmdlist, CMD_READONLY))
2910 		new_item = cmdq_get_callback(server_client_read_only, NULL);
2911 	else
2912 		new_item = cmdq_get_command(pr->cmdlist, NULL);
2913 	cmdq_append(c, new_item);
2914 	cmdq_append(c, cmdq_get_callback(server_client_command_done, NULL));
2915 
2916 	cmd_list_free(pr->cmdlist);
2917 	return;
2918 
2919 error:
2920 	cmd_free_argv(argc, argv);
2921 
2922 	cmdq_append(c, cmdq_get_error(cause));
2923 	free(cause);
2924 
2925 	c->flags |= CLIENT_EXIT;
2926 }
2927 
2928 /* Handle identify message. */
2929 static void
2930 server_client_dispatch_identify(struct client *c, struct imsg *imsg)
2931 {
2932 	const char	*data, *home;
2933 	size_t		 datalen;
2934 	int		 flags, feat;
2935 	uint64_t	 longflags;
2936 	char		*name;
2937 
2938 	if (c->flags & CLIENT_IDENTIFIED)
2939 		fatalx("out-of-order identify message");
2940 
2941 	data = imsg->data;
2942 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
2943 
2944 	switch (imsg->hdr.type)	{
2945 	case MSG_IDENTIFY_FEATURES:
2946 		if (datalen != sizeof feat)
2947 			fatalx("bad MSG_IDENTIFY_FEATURES size");
2948 		memcpy(&feat, data, sizeof feat);
2949 		c->term_features |= feat;
2950 		log_debug("client %p IDENTIFY_FEATURES %s", c,
2951 		    tty_get_features(feat));
2952 		break;
2953 	case MSG_IDENTIFY_FLAGS:
2954 		if (datalen != sizeof flags)
2955 			fatalx("bad MSG_IDENTIFY_FLAGS size");
2956 		memcpy(&flags, data, sizeof flags);
2957 		c->flags |= flags;
2958 		log_debug("client %p IDENTIFY_FLAGS %#x", c, flags);
2959 		break;
2960 	case MSG_IDENTIFY_LONGFLAGS:
2961 		if (datalen != sizeof longflags)
2962 			fatalx("bad MSG_IDENTIFY_LONGFLAGS size");
2963 		memcpy(&longflags, data, sizeof longflags);
2964 		c->flags |= longflags;
2965 		log_debug("client %p IDENTIFY_LONGFLAGS %#llx", c,
2966 		    (unsigned long long)longflags);
2967 		break;
2968 	case MSG_IDENTIFY_TERM:
2969 		if (datalen == 0 || data[datalen - 1] != '\0')
2970 			fatalx("bad MSG_IDENTIFY_TERM string");
2971 		if (*data == '\0')
2972 			c->term_name = xstrdup("unknown");
2973 		else
2974 			c->term_name = xstrdup(data);
2975 		log_debug("client %p IDENTIFY_TERM %s", c, data);
2976 		break;
2977 	case MSG_IDENTIFY_TERMINFO:
2978 		if (datalen == 0 || data[datalen - 1] != '\0')
2979 			fatalx("bad MSG_IDENTIFY_TERMINFO string");
2980 		c->term_caps = xreallocarray(c->term_caps, c->term_ncaps + 1,
2981 		    sizeof *c->term_caps);
2982 		c->term_caps[c->term_ncaps++] = xstrdup(data);
2983 		log_debug("client %p IDENTIFY_TERMINFO %s", c, data);
2984 		break;
2985 	case MSG_IDENTIFY_TTYNAME:
2986 		if (datalen == 0 || data[datalen - 1] != '\0')
2987 			fatalx("bad MSG_IDENTIFY_TTYNAME string");
2988 		c->ttyname = xstrdup(data);
2989 		log_debug("client %p IDENTIFY_TTYNAME %s", c, data);
2990 		break;
2991 	case MSG_IDENTIFY_CWD:
2992 		if (datalen == 0 || data[datalen - 1] != '\0')
2993 			fatalx("bad MSG_IDENTIFY_CWD string");
2994 		if (access(data, X_OK) == 0)
2995 			c->cwd = xstrdup(data);
2996 		else if ((home = find_home()) != NULL)
2997 			c->cwd = xstrdup(home);
2998 		else
2999 			c->cwd = xstrdup("/");
3000 		log_debug("client %p IDENTIFY_CWD %s", c, data);
3001 		break;
3002 	case MSG_IDENTIFY_STDIN:
3003 		if (datalen != 0)
3004 			fatalx("bad MSG_IDENTIFY_STDIN size");
3005 		c->fd = imsg_get_fd(imsg);
3006 		log_debug("client %p IDENTIFY_STDIN %d", c, c->fd);
3007 		break;
3008 	case MSG_IDENTIFY_STDOUT:
3009 		if (datalen != 0)
3010 			fatalx("bad MSG_IDENTIFY_STDOUT size");
3011 		c->out_fd = imsg_get_fd(imsg);
3012 		log_debug("client %p IDENTIFY_STDOUT %d", c, c->out_fd);
3013 		break;
3014 	case MSG_IDENTIFY_ENVIRON:
3015 		if (datalen == 0 || data[datalen - 1] != '\0')
3016 			fatalx("bad MSG_IDENTIFY_ENVIRON string");
3017 		if (strchr(data, '=') != NULL)
3018 			environ_put(c->environ, data, 0);
3019 		log_debug("client %p IDENTIFY_ENVIRON %s", c, data);
3020 		break;
3021 	case MSG_IDENTIFY_CLIENTPID:
3022 		if (datalen != sizeof c->pid)
3023 			fatalx("bad MSG_IDENTIFY_CLIENTPID size");
3024 		memcpy(&c->pid, data, sizeof c->pid);
3025 		log_debug("client %p IDENTIFY_CLIENTPID %ld", c, (long)c->pid);
3026 		break;
3027 	default:
3028 		break;
3029 	}
3030 
3031 	if (imsg->hdr.type != MSG_IDENTIFY_DONE)
3032 		return;
3033 	c->flags |= CLIENT_IDENTIFIED;
3034 
3035 	if (*c->ttyname != '\0')
3036 		name = xstrdup(c->ttyname);
3037 	else
3038 		xasprintf(&name, "client-%ld", (long)c->pid);
3039 	c->name = name;
3040 	log_debug("client %p name is %s", c, c->name);
3041 
3042 	if (c->flags & CLIENT_CONTROL)
3043 		control_start(c);
3044 	else if (c->fd != -1) {
3045 		if (tty_init(&c->tty, c) != 0) {
3046 			close(c->fd);
3047 			c->fd = -1;
3048 		} else {
3049 			tty_resize(&c->tty);
3050 			c->flags |= CLIENT_TERMINAL;
3051 		}
3052 		close(c->out_fd);
3053 		c->out_fd = -1;
3054 	}
3055 
3056 	/*
3057 	 * If this is the first client, load configuration files. Any later
3058 	 * clients are allowed to continue with their command even if the
3059 	 * config has not been loaded - they might have been run from inside it
3060 	 */
3061 	if ((~c->flags & CLIENT_EXIT) &&
3062 	     !cfg_finished &&
3063 	     c == TAILQ_FIRST(&clients))
3064 		start_cfg();
3065 }
3066 
3067 /* Handle shell message. */
3068 static void
3069 server_client_dispatch_shell(struct client *c)
3070 {
3071 	const char	*shell;
3072 
3073 	shell = options_get_string(global_s_options, "default-shell");
3074 	if (!checkshell(shell))
3075 		shell = _PATH_BSHELL;
3076 	proc_send(c->peer, MSG_SHELL, -1, shell, strlen(shell) + 1);
3077 
3078 	proc_kill_peer(c->peer);
3079 }
3080 
3081 /* Get client working directory. */
3082 const char *
3083 server_client_get_cwd(struct client *c, struct session *s)
3084 {
3085 	const char	*home;
3086 
3087 	if (!cfg_finished && cfg_client != NULL)
3088 		return (cfg_client->cwd);
3089 	if (c != NULL && c->session == NULL && c->cwd != NULL)
3090 		return (c->cwd);
3091 	if (s != NULL && s->cwd != NULL)
3092 		return (s->cwd);
3093 	if (c != NULL && (s = c->session) != NULL && s->cwd != NULL)
3094 		return (s->cwd);
3095 	if ((home = find_home()) != NULL)
3096 		return (home);
3097 	return ("/");
3098 }
3099 
3100 /* Get control client flags. */
3101 static uint64_t
3102 server_client_control_flags(struct client *c, const char *next)
3103 {
3104 	if (strcmp(next, "pause-after") == 0) {
3105 		c->pause_age = 0;
3106 		return (CLIENT_CONTROL_PAUSEAFTER);
3107 	}
3108 	if (sscanf(next, "pause-after=%u", &c->pause_age) == 1) {
3109 		c->pause_age *= 1000;
3110 		return (CLIENT_CONTROL_PAUSEAFTER);
3111 	}
3112 	if (strcmp(next, "no-output") == 0)
3113 		return (CLIENT_CONTROL_NOOUTPUT);
3114 	if (strcmp(next, "wait-exit") == 0)
3115 		return (CLIENT_CONTROL_WAITEXIT);
3116 	return (0);
3117 }
3118 
3119 /* Set client flags. */
3120 void
3121 server_client_set_flags(struct client *c, const char *flags)
3122 {
3123 	char	*s, *copy, *next;
3124 	uint64_t flag;
3125 	int	 not;
3126 
3127 	s = copy = xstrdup(flags);
3128 	while ((next = strsep(&s, ",")) != NULL) {
3129 		not = (*next == '!');
3130 		if (not)
3131 			next++;
3132 
3133 		if (c->flags & CLIENT_CONTROL)
3134 			flag = server_client_control_flags(c, next);
3135 		else
3136 			flag = 0;
3137 		if (strcmp(next, "read-only") == 0)
3138 			flag = CLIENT_READONLY;
3139 		else if (strcmp(next, "ignore-size") == 0)
3140 			flag = CLIENT_IGNORESIZE;
3141 		else if (strcmp(next, "active-pane") == 0)
3142 			flag = CLIENT_ACTIVEPANE;
3143 		if (flag == 0)
3144 			continue;
3145 
3146 		log_debug("client %s set flag %s", c->name, next);
3147 		if (not) {
3148 			if (c->flags & CLIENT_READONLY)
3149 				flag &= ~CLIENT_READONLY;
3150 			c->flags &= ~flag;
3151 		} else
3152 			c->flags |= flag;
3153 		if (flag == CLIENT_CONTROL_NOOUTPUT)
3154 			control_reset_offsets(c);
3155 	}
3156 	free(copy);
3157 	proc_send(c->peer, MSG_FLAGS, -1, &c->flags, sizeof c->flags);
3158 }
3159 
3160 /* Get client flags. This is only flags useful to show to users. */
3161 const char *
3162 server_client_get_flags(struct client *c)
3163 {
3164 	static char	s[256];
3165 	char	 	tmp[32];
3166 
3167 	*s = '\0';
3168 	if (c->flags & CLIENT_ATTACHED)
3169 		strlcat(s, "attached,", sizeof s);
3170 	if (c->flags & CLIENT_FOCUSED)
3171 		strlcat(s, "focused,", sizeof s);
3172 	if (c->flags & CLIENT_CONTROL)
3173 		strlcat(s, "control-mode,", sizeof s);
3174 	if (c->flags & CLIENT_IGNORESIZE)
3175 		strlcat(s, "ignore-size,", sizeof s);
3176 	if (c->flags & CLIENT_CONTROL_NOOUTPUT)
3177 		strlcat(s, "no-output,", sizeof s);
3178 	if (c->flags & CLIENT_CONTROL_WAITEXIT)
3179 		strlcat(s, "wait-exit,", sizeof s);
3180 	if (c->flags & CLIENT_CONTROL_PAUSEAFTER) {
3181 		xsnprintf(tmp, sizeof tmp, "pause-after=%u,",
3182 		    c->pause_age / 1000);
3183 		strlcat(s, tmp, sizeof s);
3184 	}
3185 	if (c->flags & CLIENT_READONLY)
3186 		strlcat(s, "read-only,", sizeof s);
3187 	if (c->flags & CLIENT_ACTIVEPANE)
3188 		strlcat(s, "active-pane,", sizeof s);
3189 	if (c->flags & CLIENT_SUSPENDED)
3190 		strlcat(s, "suspended,", sizeof s);
3191 	if (c->flags & CLIENT_UTF8)
3192 		strlcat(s, "UTF-8,", sizeof s);
3193 	if (*s != '\0')
3194 		s[strlen(s) - 1] = '\0';
3195 	return (s);
3196 }
3197 
3198 /* Get client window. */
3199 struct client_window *
3200 server_client_get_client_window(struct client *c, u_int id)
3201 {
3202 	struct client_window	cw = { .window = id };
3203 
3204 	return (RB_FIND(client_windows, &c->windows, &cw));
3205 }
3206 
3207 /* Add client window. */
3208 struct client_window *
3209 server_client_add_client_window(struct client *c, u_int id)
3210 {
3211 	struct client_window	*cw;
3212 
3213 	cw = server_client_get_client_window(c, id);
3214 	if (cw == NULL) {
3215 		cw = xcalloc(1, sizeof *cw);
3216 		cw->window = id;
3217 		RB_INSERT(client_windows, &c->windows, cw);
3218 	}
3219 	return (cw);
3220 }
3221 
3222 /* Get client active pane. */
3223 struct window_pane *
3224 server_client_get_pane(struct client *c)
3225 {
3226 	struct session		*s = c->session;
3227 	struct client_window	*cw;
3228 
3229 	if (s == NULL)
3230 		return (NULL);
3231 
3232 	if (~c->flags & CLIENT_ACTIVEPANE)
3233 		return (s->curw->window->active);
3234 	cw = server_client_get_client_window(c, s->curw->window->id);
3235 	if (cw == NULL)
3236 		return (s->curw->window->active);
3237 	return (cw->pane);
3238 }
3239 
3240 /* Set client active pane. */
3241 void
3242 server_client_set_pane(struct client *c, struct window_pane *wp)
3243 {
3244 	struct session		*s = c->session;
3245 	struct client_window	*cw;
3246 
3247 	if (s == NULL)
3248 		return;
3249 
3250 	cw = server_client_add_client_window(c, s->curw->window->id);
3251 	cw->pane = wp;
3252 	log_debug("%s pane now %%%u", c->name, wp->id);
3253 }
3254 
3255 /* Remove pane from client lists. */
3256 void
3257 server_client_remove_pane(struct window_pane *wp)
3258 {
3259 	struct client		*c;
3260 	struct window		*w = wp->window;
3261 	struct client_window	*cw;
3262 
3263 	TAILQ_FOREACH(c, &clients, entry) {
3264 		cw = server_client_get_client_window(c, w->id);
3265 		if (cw != NULL && cw->pane == wp) {
3266 			RB_REMOVE(client_windows, &c->windows, cw);
3267 			free(cw);
3268 		}
3269 	}
3270 }
3271 
3272 /* Print to a client. */
3273 void
3274 server_client_print(struct client *c, int parse, struct evbuffer *evb)
3275 {
3276 	void				*data = EVBUFFER_DATA(evb);
3277 	size_t				 size = EVBUFFER_LENGTH(evb);
3278 	struct window_pane		*wp;
3279 	struct window_mode_entry	*wme;
3280 	char				*sanitized, *msg, *line;
3281 
3282 	if (!parse) {
3283 		utf8_stravisx(&msg, data, size,
3284 		    VIS_OCTAL|VIS_CSTYLE|VIS_NOSLASH);
3285 		log_debug("%s: %s", __func__, msg);
3286 	} else {
3287 		msg = EVBUFFER_DATA(evb);
3288 		if (msg[size - 1] != '\0')
3289 			evbuffer_add(evb, "", 1);
3290 	}
3291 
3292 	if (c == NULL)
3293 		goto out;
3294 
3295 	if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
3296 		if (~c->flags & CLIENT_UTF8) {
3297 			sanitized = utf8_sanitize(msg);
3298 			if (c->flags & CLIENT_CONTROL)
3299 				control_write(c, "%s", sanitized);
3300 			else
3301 				file_print(c, "%s\n", sanitized);
3302 			free(sanitized);
3303 		} else {
3304 			if (c->flags & CLIENT_CONTROL)
3305 				control_write(c, "%s", msg);
3306 			else
3307 				file_print(c, "%s\n", msg);
3308 		}
3309 		goto out;
3310 	}
3311 
3312 	wp = server_client_get_pane(c);
3313 	wme = TAILQ_FIRST(&wp->modes);
3314 	if (wme == NULL || wme->mode != &window_view_mode)
3315 		window_pane_set_mode(wp, NULL, &window_view_mode, NULL, NULL);
3316 	if (parse) {
3317 		do {
3318 			line = evbuffer_readln(evb, NULL, EVBUFFER_EOL_LF);
3319 			if (line != NULL) {
3320 				window_copy_add(wp, 1, "%s", line);
3321 				free(line);
3322 			}
3323 		} while (line != NULL);
3324 
3325 		size = EVBUFFER_LENGTH(evb);
3326 		if (size != 0) {
3327 			line = EVBUFFER_DATA(evb);
3328 			window_copy_add(wp, 1, "%.*s", (int)size, line);
3329 		}
3330 	} else
3331 		window_copy_add(wp, 0, "%s", msg);
3332 
3333 out:
3334 	if (!parse)
3335 		free(msg);
3336 }
3337