xref: /openbsd-src/usr.bin/tmux/format.c (revision 6f31b16b9589b822b677516478fd56b65f41c3dd)
1 /* $OpenBSD: format.c,v 1.151 2018/01/18 14:28:11 nicm Exp $ */
2 
3 /*
4  * Copyright (c) 2011 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/wait.h>
21 
22 #include <errno.h>
23 #include <fnmatch.h>
24 #include <libgen.h>
25 #include <stdarg.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <time.h>
29 #include <unistd.h>
30 
31 #include "tmux.h"
32 
33 /*
34  * Build a list of key-value pairs and use them to expand #{key} entries in a
35  * string.
36  */
37 
38 struct format_entry;
39 typedef void (*format_cb)(struct format_tree *, struct format_entry *);
40 
41 static char	*format_job_get(struct format_tree *, const char *);
42 static void	 format_job_timer(int, short, void *);
43 
44 static char	*format_find(struct format_tree *, const char *, int);
45 static void	 format_add_cb(struct format_tree *, const char *, format_cb);
46 static void	 format_add_tv(struct format_tree *, const char *,
47 		     struct timeval *);
48 static int	 format_replace(struct format_tree *, const char *, size_t,
49 		     char **, size_t *, size_t *);
50 
51 static void	 format_defaults_session(struct format_tree *,
52 		     struct session *);
53 static void	 format_defaults_client(struct format_tree *, struct client *);
54 static void	 format_defaults_winlink(struct format_tree *,
55 		     struct winlink *);
56 
57 /* Entry in format job tree. */
58 struct format_job {
59 	struct client		*client;
60 	u_int			 tag;
61 	const char		*cmd;
62 	const char		*expanded;
63 
64 	time_t			 last;
65 	char			*out;
66 	int			 updated;
67 
68 	struct job		*job;
69 	int			 status;
70 
71 	RB_ENTRY(format_job)	 entry;
72 };
73 
74 /* Format job tree. */
75 static struct event format_job_event;
76 static int format_job_cmp(struct format_job *, struct format_job *);
77 static RB_HEAD(format_job_tree, format_job) format_jobs = RB_INITIALIZER();
78 RB_GENERATE_STATIC(format_job_tree, format_job, entry, format_job_cmp);
79 
80 /* Format job tree comparison function. */
81 static int
82 format_job_cmp(struct format_job *fj1, struct format_job *fj2)
83 {
84 	if (fj1->tag < fj2->tag)
85 		return (-1);
86 	if (fj1->tag > fj2->tag)
87 		return (1);
88 	return (strcmp(fj1->cmd, fj2->cmd));
89 }
90 
91 /* Format modifiers. */
92 #define FORMAT_TIMESTRING 0x1
93 #define FORMAT_BASENAME 0x2
94 #define FORMAT_DIRNAME 0x4
95 #define FORMAT_SUBSTITUTE 0x8
96 
97 /* Entry in format tree. */
98 struct format_entry {
99 	char			*key;
100 	char			*value;
101 	time_t			 t;
102 	format_cb		 cb;
103 	RB_ENTRY(format_entry)	 entry;
104 };
105 
106 /* Format entry tree. */
107 struct format_tree {
108 	struct window		*w;
109 	struct winlink		*wl;
110 	struct session		*s;
111 	struct window_pane	*wp;
112 
113 	struct client		*client;
114 	u_int			 tag;
115 	int			 flags;
116 
117 	RB_HEAD(format_entry_tree, format_entry) tree;
118 };
119 static int format_entry_cmp(struct format_entry *, struct format_entry *);
120 RB_GENERATE_STATIC(format_entry_tree, format_entry, entry, format_entry_cmp);
121 
122 /* Format entry tree comparison function. */
123 static int
124 format_entry_cmp(struct format_entry *fe1, struct format_entry *fe2)
125 {
126 	return (strcmp(fe1->key, fe2->key));
127 }
128 
129 /* Single-character uppercase aliases. */
130 static const char *format_upper[] = {
131 	NULL,		/* A */
132 	NULL,		/* B */
133 	NULL,		/* C */
134 	"pane_id",	/* D */
135 	NULL,		/* E */
136 	"window_flags",	/* F */
137 	NULL,		/* G */
138 	"host",		/* H */
139 	"window_index",	/* I */
140 	NULL,		/* J */
141 	NULL,		/* K */
142 	NULL,		/* L */
143 	NULL,		/* M */
144 	NULL,		/* N */
145 	NULL,		/* O */
146 	"pane_index",	/* P */
147 	NULL,		/* Q */
148 	NULL,		/* R */
149 	"session_name",	/* S */
150 	"pane_title",	/* T */
151 	NULL,		/* U */
152 	NULL,		/* V */
153 	"window_name",	/* W */
154 	NULL,		/* X */
155 	NULL,		/* Y */
156 	NULL 		/* Z */
157 };
158 
159 /* Single-character lowercase aliases. */
160 static const char *format_lower[] = {
161 	NULL,		/* a */
162 	NULL,		/* b */
163 	NULL,		/* c */
164 	NULL,		/* d */
165 	NULL,		/* e */
166 	NULL,		/* f */
167 	NULL,		/* g */
168 	"host_short",	/* h */
169 	NULL,		/* i */
170 	NULL,		/* j */
171 	NULL,		/* k */
172 	NULL,		/* l */
173 	NULL,		/* m */
174 	NULL,		/* n */
175 	NULL,		/* o */
176 	NULL,		/* p */
177 	NULL,		/* q */
178 	NULL,		/* r */
179 	NULL,		/* s */
180 	NULL,		/* t */
181 	NULL,		/* u */
182 	NULL,		/* v */
183 	NULL,		/* w */
184 	NULL,		/* x */
185 	NULL,		/* y */
186 	NULL		/* z */
187 };
188 
189 /* Format job update callback. */
190 static void
191 format_job_update(struct job *job)
192 {
193 	struct format_job	*fj = job->data;
194 	struct evbuffer		*evb = job->event->input;
195 	char			*line = NULL, *next;
196 	time_t			 t;
197 
198 	while ((next = evbuffer_readline(evb)) != NULL) {
199 		free(line);
200 		line = next;
201 	}
202 	if (line == NULL)
203 		return;
204 	fj->updated = 1;
205 
206 	free(fj->out);
207 	fj->out = line;
208 
209 	log_debug("%s: %p %s: %s", __func__, fj, fj->cmd, fj->out);
210 
211 	t = time(NULL);
212 	if (fj->status && fj->last != t) {
213 		if (fj->client != NULL)
214 			server_status_client(fj->client);
215 		fj->last = t;
216 	}
217 }
218 
219 /* Format job complete callback. */
220 static void
221 format_job_complete(struct job *job)
222 {
223 	struct format_job	*fj = job->data;
224 	char			*line, *buf;
225 	size_t			 len;
226 
227 	fj->job = NULL;
228 
229 	buf = NULL;
230 	if ((line = evbuffer_readline(job->event->input)) == NULL) {
231 		len = EVBUFFER_LENGTH(job->event->input);
232 		buf = xmalloc(len + 1);
233 		if (len != 0)
234 			memcpy(buf, EVBUFFER_DATA(job->event->input), len);
235 		buf[len] = '\0';
236 	} else
237 		buf = line;
238 
239 	log_debug("%s: %p %s: %s", __func__, fj, fj->cmd, buf);
240 
241 	if (*buf != '\0' || !fj->updated) {
242 		free(fj->out);
243 		fj->out = buf;
244 	} else
245 		free(buf);
246 
247 	if (fj->status) {
248 		if (fj->client != NULL)
249 			server_status_client(fj->client);
250 		fj->status = 0;
251 	}
252 }
253 
254 /* Find a job. */
255 static char *
256 format_job_get(struct format_tree *ft, const char *cmd)
257 {
258 	struct format_job_tree	*jobs;
259 	struct format_job	 fj0, *fj;
260 	time_t			 t;
261 	char			*expanded;
262 	int			 force;
263 
264 	if (ft->client == NULL)
265 		jobs = &format_jobs;
266 	else if (ft->client->jobs != NULL)
267 		jobs = ft->client->jobs;
268 	else {
269 		jobs = ft->client->jobs = xmalloc(sizeof *ft->client->jobs);
270 		RB_INIT(jobs);
271 	}
272 
273 	fj0.tag = ft->tag;
274 	fj0.cmd = cmd;
275 	if ((fj = RB_FIND(format_job_tree, jobs, &fj0)) == NULL) {
276 		fj = xcalloc(1, sizeof *fj);
277 		fj->client = ft->client;
278 		fj->tag = ft->tag;
279 		fj->cmd = xstrdup(cmd);
280 		fj->expanded = NULL;
281 
282 		xasprintf(&fj->out, "<'%s' not ready>", fj->cmd);
283 
284 		RB_INSERT(format_job_tree, jobs, fj);
285 	}
286 
287 	expanded = format_expand(ft, cmd);
288 	if (fj->expanded == NULL || strcmp(expanded, fj->expanded) != 0) {
289 		free((void *)fj->expanded);
290 		fj->expanded = xstrdup(expanded);
291 		force = 1;
292 	} else
293 		force = (ft->flags & FORMAT_FORCE);
294 
295 	t = time(NULL);
296 	if (fj->job == NULL && (force || fj->last != t)) {
297 		fj->job = job_run(expanded, NULL, NULL, format_job_update,
298 		    format_job_complete, NULL, fj);
299 		if (fj->job == NULL) {
300 			free(fj->out);
301 			xasprintf(&fj->out, "<'%s' didn't start>", fj->cmd);
302 		}
303 		fj->last = t;
304 		fj->updated = 0;
305 	}
306 
307 	if (ft->flags & FORMAT_STATUS)
308 		fj->status = 1;
309 
310 	free(expanded);
311 	return (format_expand(ft, fj->out));
312 }
313 
314 /* Remove old jobs. */
315 static void
316 format_job_tidy(struct format_job_tree *jobs, int force)
317 {
318 	struct format_job	*fj, *fj1;
319 	time_t			 now;
320 
321 	now = time(NULL);
322 	RB_FOREACH_SAFE(fj, format_job_tree, jobs, fj1) {
323 		if (!force && (fj->last > now || now - fj->last < 3600))
324 			continue;
325 		RB_REMOVE(format_job_tree, jobs, fj);
326 
327 		log_debug("%s: %s", __func__, fj->cmd);
328 
329 		if (fj->job != NULL)
330 			job_free(fj->job);
331 
332 		free((void *)fj->expanded);
333 		free((void *)fj->cmd);
334 		free(fj->out);
335 
336 		free(fj);
337 	}
338 }
339 
340 /* Remove old jobs for client. */
341 void
342 format_lost_client(struct client *c)
343 {
344 	if (c->jobs != NULL)
345 		format_job_tidy(c->jobs, 1);
346 	free(c->jobs);
347 }
348 
349 /* Remove old jobs periodically. */
350 static void
351 format_job_timer(__unused int fd, __unused short events, __unused void *arg)
352 {
353 	struct client	*c;
354 	struct timeval	 tv = { .tv_sec = 60 };
355 
356 	format_job_tidy(&format_jobs, 0);
357 	TAILQ_FOREACH(c, &clients, entry) {
358 		if (c->jobs != NULL)
359 			format_job_tidy(c->jobs, 0);
360 	}
361 
362 	evtimer_del(&format_job_event);
363 	evtimer_add(&format_job_event, &tv);
364 }
365 
366 /* Callback for host. */
367 static void
368 format_cb_host(__unused struct format_tree *ft, struct format_entry *fe)
369 {
370 	char host[HOST_NAME_MAX + 1];
371 
372 	if (gethostname(host, sizeof host) != 0)
373 		fe->value = xstrdup("");
374 	else
375 		fe->value = xstrdup(host);
376 }
377 
378 /* Callback for host_short. */
379 static void
380 format_cb_host_short(__unused struct format_tree *ft, struct format_entry *fe)
381 {
382 	char host[HOST_NAME_MAX + 1], *cp;
383 
384 	if (gethostname(host, sizeof host) != 0)
385 		fe->value = xstrdup("");
386 	else {
387 		if ((cp = strchr(host, '.')) != NULL)
388 			*cp = '\0';
389 		fe->value = xstrdup(host);
390 	}
391 }
392 
393 /* Callback for pid. */
394 static void
395 format_cb_pid(__unused struct format_tree *ft, struct format_entry *fe)
396 {
397 	xasprintf(&fe->value, "%ld", (long)getpid());
398 }
399 
400 /* Callback for session_alerts. */
401 static void
402 format_cb_session_alerts(struct format_tree *ft, struct format_entry *fe)
403 {
404 	struct session	*s = ft->s;
405 	struct winlink	*wl;
406 	char		 alerts[1024], tmp[16];
407 
408 	if (s == NULL)
409 		return;
410 
411 	*alerts = '\0';
412 	RB_FOREACH(wl, winlinks, &s->windows) {
413 		if ((wl->flags & WINLINK_ALERTFLAGS) == 0)
414 			continue;
415 		xsnprintf(tmp, sizeof tmp, "%u", wl->idx);
416 
417 		if (*alerts != '\0')
418 			strlcat(alerts, ",", sizeof alerts);
419 		strlcat(alerts, tmp, sizeof alerts);
420 		if (wl->flags & WINLINK_ACTIVITY)
421 			strlcat(alerts, "#", sizeof alerts);
422 		if (wl->flags & WINLINK_BELL)
423 			strlcat(alerts, "!", sizeof alerts);
424 		if (wl->flags & WINLINK_SILENCE)
425 			strlcat(alerts, "~", sizeof alerts);
426 	}
427 	fe->value = xstrdup(alerts);
428 }
429 
430 /* Callback for session_stack. */
431 static void
432 format_cb_session_stack(struct format_tree *ft, struct format_entry *fe)
433 {
434 	struct session	*s = ft->s;
435 	struct winlink	*wl;
436 	char		 result[1024], tmp[16];
437 
438 	if (s == NULL)
439 		return;
440 
441 	xsnprintf(result, sizeof result, "%u", s->curw->idx);
442 	TAILQ_FOREACH(wl, &s->lastw, sentry) {
443 		xsnprintf(tmp, sizeof tmp, "%u", wl->idx);
444 
445 		if (*result != '\0')
446 			strlcat(result, ",", sizeof result);
447 		strlcat(result, tmp, sizeof result);
448 	}
449 	fe->value = xstrdup(result);
450 }
451 
452 /* Callback for window_stack_index. */
453 static void
454 format_cb_window_stack_index(struct format_tree *ft, struct format_entry *fe)
455 {
456 	struct session	*s = ft->wl->session;
457 	struct winlink	*wl;
458 	u_int		 idx;
459 
460 	idx = 0;
461 	TAILQ_FOREACH(wl, &s->lastw, sentry) {
462 		idx++;
463 		if (wl == ft->wl)
464 			break;
465 	}
466 	if (wl != NULL)
467 		xasprintf(&fe->value, "%u", idx);
468 	else
469 		fe->value = xstrdup("0");
470 }
471 
472 /* Callback for window_layout. */
473 static void
474 format_cb_window_layout(struct format_tree *ft, struct format_entry *fe)
475 {
476 	struct window	*w = ft->w;
477 
478 	if (w == NULL)
479 		return;
480 
481 	if (w->saved_layout_root != NULL)
482 		fe->value = layout_dump(w->saved_layout_root);
483 	else
484 		fe->value = layout_dump(w->layout_root);
485 }
486 
487 /* Callback for window_visible_layout. */
488 static void
489 format_cb_window_visible_layout(struct format_tree *ft, struct format_entry *fe)
490 {
491 	struct window	*w = ft->w;
492 
493 	if (w == NULL)
494 		return;
495 
496 	fe->value = layout_dump(w->layout_root);
497 }
498 
499 /* Callback for pane_start_command. */
500 static void
501 format_cb_start_command(struct format_tree *ft, struct format_entry *fe)
502 {
503 	struct window_pane	*wp = ft->wp;
504 
505 	if (wp == NULL)
506 		return;
507 
508 	fe->value = cmd_stringify_argv(wp->argc, wp->argv);
509 }
510 
511 /* Callback for pane_current_command. */
512 static void
513 format_cb_current_command(struct format_tree *ft, struct format_entry *fe)
514 {
515 	struct window_pane	*wp = ft->wp;
516 	char			*cmd;
517 
518 	if (wp == NULL)
519 		return;
520 
521 	cmd = get_proc_name(wp->fd, wp->tty);
522 	if (cmd == NULL || *cmd == '\0') {
523 		free(cmd);
524 		cmd = cmd_stringify_argv(wp->argc, wp->argv);
525 		if (cmd == NULL || *cmd == '\0') {
526 			free(cmd);
527 			cmd = xstrdup(wp->shell);
528 		}
529 	}
530 	fe->value = parse_window_name(cmd);
531 	free(cmd);
532 }
533 
534 /* Callback for history_bytes. */
535 static void
536 format_cb_history_bytes(struct format_tree *ft, struct format_entry *fe)
537 {
538 	struct window_pane	*wp = ft->wp;
539 	struct grid		*gd;
540 	struct grid_line	*gl;
541 	unsigned long long	 size;
542 	u_int			 i;
543 
544 	if (wp == NULL)
545 		return;
546 	gd = wp->base.grid;
547 
548 	size = 0;
549 	for (i = 0; i < gd->hsize; i++) {
550 		gl = &gd->linedata[i];
551 		size += gl->cellsize * sizeof *gl->celldata;
552 		size += gl->extdsize * sizeof *gl->extddata;
553 	}
554 	size += gd->hsize * sizeof *gd->linedata;
555 
556 	xasprintf(&fe->value, "%llu", size);
557 }
558 
559 /* Callback for pane_tabs. */
560 static void
561 format_cb_pane_tabs(struct format_tree *ft, struct format_entry *fe)
562 {
563 	struct window_pane	*wp = ft->wp;
564 	struct evbuffer		*buffer;
565 	u_int			 i;
566 	int			 size;
567 
568 	if (wp == NULL)
569 		return;
570 
571 	buffer = evbuffer_new();
572 	for (i = 0; i < wp->base.grid->sx; i++) {
573 		if (!bit_test(wp->base.tabs, i))
574 			continue;
575 
576 		if (EVBUFFER_LENGTH(buffer) > 0)
577 			evbuffer_add(buffer, ",", 1);
578 		evbuffer_add_printf(buffer, "%u", i);
579 	}
580 	if ((size = EVBUFFER_LENGTH(buffer)) != 0)
581 		xasprintf(&fe->value, "%.*s", size, EVBUFFER_DATA(buffer));
582 	evbuffer_free(buffer);
583 }
584 
585 /* Callback for session_group_list. */
586 static void
587 format_cb_session_group_list(struct format_tree *ft, struct format_entry *fe)
588 {
589 	struct session		*s = ft->s;
590 	struct session_group	*sg;
591 	struct session		*loop;
592 	struct evbuffer		*buffer;
593 	int			 size;
594 
595 	if (s == NULL)
596 		return;
597 	sg = session_group_contains(s);
598 	if (sg == NULL)
599 		return;
600 
601 	buffer = evbuffer_new();
602 	TAILQ_FOREACH(loop, &sg->sessions, gentry) {
603 		if (EVBUFFER_LENGTH(buffer) > 0)
604 			evbuffer_add(buffer, ",", 1);
605 		evbuffer_add_printf(buffer, "%s", loop->name);
606 	}
607 	if ((size = EVBUFFER_LENGTH(buffer)) != 0)
608 		xasprintf(&fe->value, "%.*s", size, EVBUFFER_DATA(buffer));
609 	evbuffer_free(buffer);
610 }
611 
612 /* Merge a format tree. */
613 static void
614 format_merge(struct format_tree *ft, struct format_tree *from)
615 {
616 	struct format_entry	*fe;
617 
618 	RB_FOREACH(fe, format_entry_tree, &from->tree) {
619 		if (fe->value != NULL)
620 			format_add(ft, fe->key, "%s", fe->value);
621 	}
622 }
623 
624 /* Create a new tree. */
625 struct format_tree *
626 format_create(struct client *c, struct cmdq_item *item, int tag, int flags)
627 {
628 	struct format_tree	*ft;
629 
630 	if (!event_initialized(&format_job_event)) {
631 		evtimer_set(&format_job_event, format_job_timer, NULL);
632 		format_job_timer(-1, 0, NULL);
633 	}
634 
635 	ft = xcalloc(1, sizeof *ft);
636 	RB_INIT(&ft->tree);
637 
638 	if (c != NULL) {
639 		ft->client = c;
640 		ft->client->references++;
641 	}
642 
643 	ft->tag = tag;
644 	ft->flags = flags;
645 
646 	format_add_cb(ft, "host", format_cb_host);
647 	format_add_cb(ft, "host_short", format_cb_host_short);
648 	format_add_cb(ft, "pid", format_cb_pid);
649 	format_add(ft, "socket_path", "%s", socket_path);
650 	format_add_tv(ft, "start_time", &start_time);
651 
652 	if (item != NULL) {
653 		if (item->cmd != NULL)
654 			format_add(ft, "command", "%s", item->cmd->entry->name);
655 		if (item->shared != NULL && item->shared->formats != NULL)
656 			format_merge(ft, item->shared->formats);
657 	}
658 
659 	return (ft);
660 }
661 
662 /* Free a tree. */
663 void
664 format_free(struct format_tree *ft)
665 {
666 	struct format_entry	*fe, *fe1;
667 
668 	RB_FOREACH_SAFE(fe, format_entry_tree, &ft->tree, fe1) {
669 		RB_REMOVE(format_entry_tree, &ft->tree, fe);
670 		free(fe->value);
671 		free(fe->key);
672 		free(fe);
673 	}
674 
675 	if (ft->client != NULL)
676 		server_client_unref(ft->client);
677 	free(ft);
678 }
679 
680 /* Add a key-value pair. */
681 void
682 format_add(struct format_tree *ft, const char *key, const char *fmt, ...)
683 {
684 	struct format_entry	*fe;
685 	struct format_entry	*fe_now;
686 	va_list			 ap;
687 
688 	fe = xmalloc(sizeof *fe);
689 	fe->key = xstrdup(key);
690 
691 	fe_now = RB_INSERT(format_entry_tree, &ft->tree, fe);
692 	if (fe_now != NULL) {
693 		free(fe->key);
694 		free(fe);
695 		free(fe_now->value);
696 		fe = fe_now;
697 	}
698 
699 	fe->cb = NULL;
700 	fe->t = 0;
701 
702 	va_start(ap, fmt);
703 	xvasprintf(&fe->value, fmt, ap);
704 	va_end(ap);
705 }
706 
707 /* Add a key and time. */
708 static void
709 format_add_tv(struct format_tree *ft, const char *key, struct timeval *tv)
710 {
711 	struct format_entry	*fe;
712 	struct format_entry	*fe_now;
713 
714 	fe = xmalloc(sizeof *fe);
715 	fe->key = xstrdup(key);
716 
717 	fe_now = RB_INSERT(format_entry_tree, &ft->tree, fe);
718 	if (fe_now != NULL) {
719 		free(fe->key);
720 		free(fe);
721 		free(fe_now->value);
722 		fe = fe_now;
723 	}
724 
725 	fe->cb = NULL;
726 	fe->t = tv->tv_sec;
727 
728 	fe->value = NULL;
729 }
730 
731 /* Add a key and function. */
732 static void
733 format_add_cb(struct format_tree *ft, const char *key, format_cb cb)
734 {
735 	struct format_entry	*fe;
736 	struct format_entry	*fe_now;
737 
738 	fe = xmalloc(sizeof *fe);
739 	fe->key = xstrdup(key);
740 
741 	fe_now = RB_INSERT(format_entry_tree, &ft->tree, fe);
742 	if (fe_now != NULL) {
743 		free(fe->key);
744 		free(fe);
745 		free(fe_now->value);
746 		fe = fe_now;
747 	}
748 
749 	fe->cb = cb;
750 	fe->t = 0;
751 
752 	fe->value = NULL;
753 }
754 
755 /* Find a format entry. */
756 static char *
757 format_find(struct format_tree *ft, const char *key, int modifiers)
758 {
759 	struct format_entry	*fe, fe_find;
760 	struct environ_entry	*envent;
761 	static char		 s[64];
762 	struct options_entry	*o;
763 	const char		*found;
764 	int			 idx;
765 	char			*copy, *saved;
766 
767 	if (~modifiers & FORMAT_TIMESTRING) {
768 		o = options_parse_get(global_options, key, &idx, 0);
769 		if (o == NULL && ft->w != NULL)
770 			o = options_parse_get(ft->w->options, key, &idx, 0);
771 		if (o == NULL)
772 			o = options_parse_get(global_w_options, key, &idx, 0);
773 		if (o == NULL && ft->s != NULL)
774 			o = options_parse_get(ft->s->options, key, &idx, 0);
775 		if (o == NULL)
776 			o = options_parse_get(global_s_options, key, &idx, 0);
777 		if (o != NULL) {
778 			found = options_tostring(o, idx, 1);
779 			goto found;
780 		}
781 	}
782 	found = NULL;
783 
784 	fe_find.key = (char *) key;
785 	fe = RB_FIND(format_entry_tree, &ft->tree, &fe_find);
786 	if (fe != NULL) {
787 		if (modifiers & FORMAT_TIMESTRING) {
788 			if (fe->t == 0)
789 				return (NULL);
790 			ctime_r(&fe->t, s);
791 			s[strcspn(s, "\n")] = '\0';
792 			found = s;
793 			goto found;
794 		}
795 		if (fe->t != 0) {
796 			xsnprintf(s, sizeof s, "%lld", (long long)fe->t);
797 			found = s;
798 			goto found;
799 		}
800 		if (fe->value == NULL && fe->cb != NULL) {
801 			fe->cb(ft, fe);
802 			if (fe->value == NULL)
803 				fe->value = xstrdup("");
804 		}
805 		found = fe->value;
806 		goto found;
807 	}
808 
809 	if (~modifiers & FORMAT_TIMESTRING) {
810 		envent = NULL;
811 		if (ft->s != NULL)
812 			envent = environ_find(ft->s->environ, key);
813 		if (envent == NULL)
814 			envent = environ_find(global_environ, key);
815 		if (envent != NULL) {
816 			found = envent->value;
817 			goto found;
818 		}
819 	}
820 
821 	return (NULL);
822 
823 found:
824 	if (found == NULL)
825 		return (NULL);
826 	copy = xstrdup(found);
827 	if (modifiers & FORMAT_BASENAME) {
828 		saved = copy;
829 		copy = xstrdup(basename(saved));
830 		free(saved);
831 	}
832 	if (modifiers & FORMAT_DIRNAME) {
833 		saved = copy;
834 		copy = xstrdup(dirname(saved));
835 		free(saved);
836 	}
837 	return (copy);
838 }
839 
840 /* Skip until comma. */
841 static char *
842 format_skip(char *s)
843 {
844 	int	brackets = 0;
845 
846 	for (; *s != '\0'; s++) {
847 		if (*s == '{')
848 			brackets++;
849 		if (*s == '}')
850 			brackets--;
851 		if (*s == ',' && brackets == 0)
852 			break;
853 	}
854 	if (*s == '\0')
855 		return (NULL);
856 	return (s);
857 }
858 
859 /* Return left and right alternatives separated by commas. */
860 static int
861 format_choose(char *s, char **left, char **right)
862 {
863 	char	*cp;
864 
865 	cp = format_skip(s);
866 	if (cp == NULL)
867 		return (-1);
868 	*cp = '\0';
869 
870 	*left = s;
871 	*right = cp + 1;
872 	return (0);
873 }
874 
875 /* Is this true? */
876 int
877 format_true(const char *s)
878 {
879 	if (s != NULL && *s != '\0' && (s[0] != '0' || s[1] != '\0'))
880 		return (1);
881 	return (0);
882 }
883 
884 /* Replace a key. */
885 static int
886 format_replace(struct format_tree *ft, const char *key, size_t keylen,
887     char **buf, size_t *len, size_t *off)
888 {
889 	struct window_pane	*wp = ft->wp;
890 	char			*copy, *copy0, *endptr, *ptr, *found, *new;
891 	char			*value, *from = NULL, *to = NULL, *left, *right;
892 	size_t			 valuelen, newlen, fromlen, tolen, used;
893 	long			 limit = 0;
894 	int			 modifiers = 0, compare = 0, search = 0;
895 
896 	/* Make a copy of the key. */
897 	copy0 = copy = xmalloc(keylen + 1);
898 	memcpy(copy, key, keylen);
899 	copy[keylen] = '\0';
900 
901 	/* Is there a length limit or whatnot? */
902 	switch (copy[0]) {
903 	case 'm':
904 		if (copy[1] != ':')
905 			break;
906 		compare = -2;
907 		copy += 2;
908 		break;
909 	case 'C':
910 		if (copy[1] != ':')
911 			break;
912 		search = 1;
913 		copy += 2;
914 		break;
915 	case '|':
916 		if (copy[1] != '|' || copy[2] != ':')
917 			break;
918 		compare = -3;
919 		copy += 3;
920 		break;
921 	case '&':
922 		if (copy[1] != '&' || copy[2] != ':')
923 			break;
924 		compare = -4;
925 		copy += 3;
926 		break;
927 	case '!':
928 		if (copy[1] == '=' && copy[2] == ':') {
929 			compare = -1;
930 			copy += 3;
931 			break;
932 		}
933 		break;
934 	case '=':
935 		if (copy[1] == '=' && copy[2] == ':') {
936 			compare = 1;
937 			copy += 3;
938 			break;
939 		}
940 		errno = 0;
941 		limit = strtol(copy + 1, &endptr, 10);
942 		if (errno == ERANGE && (limit == LONG_MIN || limit == LONG_MAX))
943 			break;
944 		if (*endptr != ':')
945 			break;
946 		copy = endptr + 1;
947 		break;
948 	case 'b':
949 		if (copy[1] != ':')
950 			break;
951 		modifiers |= FORMAT_BASENAME;
952 		copy += 2;
953 		break;
954 	case 'd':
955 		if (copy[1] != ':')
956 			break;
957 		modifiers |= FORMAT_DIRNAME;
958 		copy += 2;
959 		break;
960 	case 't':
961 		if (copy[1] != ':')
962 			break;
963 		modifiers |= FORMAT_TIMESTRING;
964 		copy += 2;
965 		break;
966 	case 's':
967 		if (copy[1] != '/')
968 			break;
969 		from = copy + 2;
970 		for (copy = from; *copy != '\0' && *copy != '/'; copy++)
971 			/* nothing */;
972 		if (copy[0] != '/' || copy == from) {
973 			copy = copy0;
974 			break;
975 		}
976 		copy[0] = '\0';
977 		to = copy + 1;
978 		for (copy = to; *copy != '\0' && *copy != '/'; copy++)
979 			/* nothing */;
980 		if (copy[0] != '/' || copy[1] != ':') {
981 			copy = copy0;
982 			break;
983 		}
984 		copy[0] = '\0';
985 
986 		modifiers |= FORMAT_SUBSTITUTE;
987 		copy += 2;
988 		break;
989 	}
990 
991 	/* Is this a comparison or a conditional? */
992 	if (search) {
993 		/* Search in pane. */
994 		if (wp == NULL)
995 			value = xstrdup("0");
996 		else
997 			xasprintf(&value, "%u", window_pane_search(wp, copy));
998 	} else if (compare != 0) {
999 		/* Comparison: compare comma-separated left and right. */
1000 		if (format_choose(copy, &left, &right) != 0)
1001 			goto fail;
1002 		left = format_expand(ft, left);
1003 		right = format_expand(ft, right);
1004 		if (compare == -3 &&
1005 		    (format_true(left) || format_true(right)))
1006 			value = xstrdup("1");
1007 		else if (compare == -4 &&
1008 		    (format_true(left) && format_true(right)))
1009 			value = xstrdup("1");
1010 		else if (compare == 1 && strcmp(left, right) == 0)
1011 			value = xstrdup("1");
1012 		else if (compare == -1 && strcmp(left, right) != 0)
1013 			value = xstrdup("1");
1014 		else if (compare == -2 && fnmatch(left, right, 0) == 0)
1015 			value = xstrdup("1");
1016 		else
1017 			value = xstrdup("0");
1018 		free(right);
1019 		free(left);
1020 	} else if (*copy == '?') {
1021 		/* Conditional: check first and choose second or third. */
1022 		ptr = format_skip(copy);
1023 		if (ptr == NULL)
1024 			goto fail;
1025 		*ptr = '\0';
1026 
1027 		found = format_find(ft, copy + 1, modifiers);
1028 		if (found == NULL)
1029 			found = format_expand(ft, copy + 1);
1030 		if (format_choose(ptr + 1, &left, &right) != 0)
1031 			goto fail;
1032 
1033 		if (format_true(found))
1034 			value = format_expand(ft, left);
1035 		else
1036 			value = format_expand(ft, right);
1037 		free(found);
1038 	} else {
1039 		/* Neither: look up directly. */
1040 		value = format_find(ft, copy, modifiers);
1041 		if (value == NULL)
1042 			value = xstrdup("");
1043 	}
1044 
1045 	/* Perform substitution if any. */
1046 	if (modifiers & FORMAT_SUBSTITUTE) {
1047 		fromlen = strlen(from);
1048 		tolen = strlen(to);
1049 
1050 		newlen = strlen(value) + 1;
1051 		copy = new = xmalloc(newlen);
1052 		for (ptr = value; *ptr != '\0'; /* nothing */) {
1053 			if (strncmp(ptr, from, fromlen) != 0) {
1054 				*new++ = *ptr++;
1055 				continue;
1056 			}
1057 			used = new - copy;
1058 
1059 			newlen += tolen;
1060 			copy = xrealloc(copy, newlen);
1061 
1062 			new = copy + used;
1063 			memcpy(new, to, tolen);
1064 
1065 			new += tolen;
1066 			ptr += fromlen;
1067 		}
1068 		*new = '\0';
1069 		free(value);
1070 		value = copy;
1071 	}
1072 
1073 	/* Truncate the value if needed. */
1074 	if (limit > 0) {
1075 		new = utf8_trimcstr(value, limit);
1076 		free(value);
1077 		value = new;
1078 	} else if (limit < 0) {
1079 		new = utf8_rtrimcstr(value, -limit);
1080 		free(value);
1081 		value = new;
1082 	}
1083 
1084 	/* Expand the buffer and copy in the value. */
1085 	valuelen = strlen(value);
1086 	while (*len - *off < valuelen + 1) {
1087 		*buf = xreallocarray(*buf, 2, *len);
1088 		*len *= 2;
1089 	}
1090 	memcpy(*buf + *off, value, valuelen);
1091 	*off += valuelen;
1092 
1093 	free(value);
1094 	free(copy0);
1095 	return (0);
1096 
1097 fail:
1098 	free(copy0);
1099 	return (-1);
1100 }
1101 
1102 /* Expand keys in a template, passing through strftime first. */
1103 char *
1104 format_expand_time(struct format_tree *ft, const char *fmt, time_t t)
1105 {
1106 	struct tm	*tm;
1107 	char		 s[2048];
1108 
1109 	if (fmt == NULL || *fmt == '\0')
1110 		return (xstrdup(""));
1111 
1112 	tm = localtime(&t);
1113 
1114 	if (strftime(s, sizeof s, fmt, tm) == 0)
1115 		return (xstrdup(""));
1116 
1117 	return (format_expand(ft, s));
1118 }
1119 
1120 /* Expand keys in a template. */
1121 char *
1122 format_expand(struct format_tree *ft, const char *fmt)
1123 {
1124 	char		*buf, *out;
1125 	const char	*ptr, *s, *saved = fmt;
1126 	size_t		 off, len, n, outlen;
1127 	int     	 ch, brackets;
1128 
1129 	if (fmt == NULL)
1130 		return (xstrdup(""));
1131 
1132 	len = 64;
1133 	buf = xmalloc(len);
1134 	off = 0;
1135 
1136 	while (*fmt != '\0') {
1137 		if (*fmt != '#') {
1138 			while (len - off < 2) {
1139 				buf = xreallocarray(buf, 2, len);
1140 				len *= 2;
1141 			}
1142 			buf[off++] = *fmt++;
1143 			continue;
1144 		}
1145 		fmt++;
1146 
1147 		ch = (u_char) *fmt++;
1148 		switch (ch) {
1149 		case '(':
1150 			brackets = 1;
1151 			for (ptr = fmt; *ptr != '\0'; ptr++) {
1152 				if (*ptr == '(')
1153 					brackets++;
1154 				if (*ptr == ')' && --brackets == 0)
1155 					break;
1156 			}
1157 			if (*ptr != ')' || brackets != 0)
1158 				break;
1159 			n = ptr - fmt;
1160 
1161 			if (ft->flags & FORMAT_NOJOBS)
1162 				out = xstrdup("");
1163 			else
1164 				out = format_job_get(ft, xstrndup(fmt, n));
1165 			outlen = strlen(out);
1166 
1167 			while (len - off < outlen + 1) {
1168 				buf = xreallocarray(buf, 2, len);
1169 				len *= 2;
1170 			}
1171 			memcpy(buf + off, out, outlen);
1172 			off += outlen;
1173 
1174 			free(out);
1175 
1176 			fmt += n + 1;
1177 			continue;
1178 		case '{':
1179 			brackets = 1;
1180 			for (ptr = fmt; *ptr != '\0'; ptr++) {
1181 				if (*ptr == '{')
1182 					brackets++;
1183 				if (*ptr == '}' && --brackets == 0)
1184 					break;
1185 			}
1186 			if (*ptr != '}' || brackets != 0)
1187 				break;
1188 			n = ptr - fmt;
1189 
1190 			if (format_replace(ft, fmt, n, &buf, &len, &off) != 0)
1191 				break;
1192 			fmt += n + 1;
1193 			continue;
1194 		case '#':
1195 			while (len - off < 2) {
1196 				buf = xreallocarray(buf, 2, len);
1197 				len *= 2;
1198 			}
1199 			buf[off++] = '#';
1200 			continue;
1201 		default:
1202 			s = NULL;
1203 			if (ch >= 'A' && ch <= 'Z')
1204 				s = format_upper[ch - 'A'];
1205 			else if (ch >= 'a' && ch <= 'z')
1206 				s = format_lower[ch - 'a'];
1207 			if (s == NULL) {
1208 				while (len - off < 3) {
1209 					buf = xreallocarray(buf, 2, len);
1210 					len *= 2;
1211 				}
1212 				buf[off++] = '#';
1213 				buf[off++] = ch;
1214 				continue;
1215 			}
1216 			n = strlen(s);
1217 			if (format_replace(ft, s, n, &buf, &len, &off) != 0)
1218 				break;
1219 			continue;
1220 		}
1221 
1222 		break;
1223 	}
1224 	buf[off] = '\0';
1225 
1226 	log_debug("format '%s' -> '%s'", saved, buf);
1227 	return (buf);
1228 }
1229 
1230 /* Expand a single string. */
1231 char *
1232 format_single(struct cmdq_item *item, const char *fmt, struct client *c,
1233     struct session *s, struct winlink *wl, struct window_pane *wp)
1234 {
1235 	struct format_tree	*ft;
1236 	char			*expanded;
1237 
1238 	if (item != NULL)
1239 		ft = format_create(item->client, item, FORMAT_NONE, 0);
1240 	else
1241 		ft = format_create(NULL, item, FORMAT_NONE, 0);
1242 	format_defaults(ft, c, s, wl, wp);
1243 
1244 	expanded = format_expand(ft, fmt);
1245 	format_free(ft);
1246 	return (expanded);
1247 }
1248 
1249 /* Set defaults for any of arguments that are not NULL. */
1250 void
1251 format_defaults(struct format_tree *ft, struct client *c, struct session *s,
1252     struct winlink *wl, struct window_pane *wp)
1253 {
1254 	format_add(ft, "session_format", "%d", s != NULL);
1255 	format_add(ft, "window_format", "%d", wl != NULL);
1256 	format_add(ft, "pane_format", "%d", wp != NULL);
1257 
1258 	if (s == NULL && c != NULL)
1259 		s = c->session;
1260 	if (wl == NULL && s != NULL)
1261 		wl = s->curw;
1262 	if (wp == NULL && wl != NULL)
1263 		wp = wl->window->active;
1264 
1265 	if (c != NULL)
1266 		format_defaults_client(ft, c);
1267 	if (s != NULL)
1268 		format_defaults_session(ft, s);
1269 	if (wl != NULL)
1270 		format_defaults_winlink(ft, wl);
1271 	if (wp != NULL)
1272 		format_defaults_pane(ft, wp);
1273 }
1274 
1275 /* Set default format keys for a session. */
1276 static void
1277 format_defaults_session(struct format_tree *ft, struct session *s)
1278 {
1279 	struct session_group	*sg;
1280 
1281 	ft->s = s;
1282 
1283 	format_add(ft, "session_name", "%s", s->name);
1284 	format_add(ft, "session_windows", "%u", winlink_count(&s->windows));
1285 	format_add(ft, "session_width", "%u", s->sx);
1286 	format_add(ft, "session_height", "%u", s->sy);
1287 	format_add(ft, "session_id", "$%u", s->id);
1288 
1289 	sg = session_group_contains(s);
1290 	format_add(ft, "session_grouped", "%d", sg != NULL);
1291 	if (sg != NULL) {
1292 		format_add(ft, "session_group", "%s", sg->name);
1293 		format_add(ft, "session_group_size", "%u",
1294 		    session_group_count (sg));
1295 		format_add_cb(ft, "session_group_list",
1296 		    format_cb_session_group_list);
1297 	}
1298 
1299 	format_add_tv(ft, "session_created", &s->creation_time);
1300 	format_add_tv(ft, "session_last_attached", &s->last_attached_time);
1301 	format_add_tv(ft, "session_activity", &s->activity_time);
1302 
1303 	format_add(ft, "session_attached", "%u", s->attached);
1304 	format_add(ft, "session_many_attached", "%d", s->attached > 1);
1305 
1306 	format_add_cb(ft, "session_alerts", format_cb_session_alerts);
1307 	format_add_cb(ft, "session_stack", format_cb_session_stack);
1308 }
1309 
1310 /* Set default format keys for a client. */
1311 static void
1312 format_defaults_client(struct format_tree *ft, struct client *c)
1313 {
1314 	struct session	*s;
1315 	const char	*name;
1316 	struct tty	*tty = &c->tty;
1317 	const char	*types[] = TTY_TYPES;
1318 
1319 	if (ft->s == NULL)
1320 		ft->s = c->session;
1321 
1322 	format_add(ft, "client_name", "%s", c->name);
1323 	format_add(ft, "client_pid", "%ld", (long) c->pid);
1324 	format_add(ft, "client_height", "%u", tty->sy);
1325 	format_add(ft, "client_width", "%u", tty->sx);
1326 	format_add(ft, "client_tty", "%s", c->ttyname);
1327 	format_add(ft, "client_control_mode", "%d",
1328 		!!(c->flags & CLIENT_CONTROL));
1329 
1330 	if (tty->term_name != NULL)
1331 		format_add(ft, "client_termname", "%s", tty->term_name);
1332 	if (tty->term_name != NULL)
1333 		format_add(ft, "client_termtype", "%s", types[tty->term_type]);
1334 
1335 	format_add_tv(ft, "client_created", &c->creation_time);
1336 	format_add_tv(ft, "client_activity", &c->activity_time);
1337 
1338 	format_add(ft, "client_written", "%zu", c->written);
1339 	format_add(ft, "client_discarded", "%zu", c->discarded);
1340 
1341 	name = server_client_get_key_table(c);
1342 	if (strcmp(c->keytable->name, name) == 0)
1343 		format_add(ft, "client_prefix", "%d", 0);
1344 	else
1345 		format_add(ft, "client_prefix", "%d", 1);
1346 	format_add(ft, "client_key_table", "%s", c->keytable->name);
1347 
1348 	if (tty->flags & TTY_UTF8)
1349 		format_add(ft, "client_utf8", "%d", 1);
1350 	else
1351 		format_add(ft, "client_utf8", "%d", 0);
1352 
1353 	if (c->flags & CLIENT_READONLY)
1354 		format_add(ft, "client_readonly", "%d", 1);
1355 	else
1356 		format_add(ft, "client_readonly", "%d", 0);
1357 
1358 	s = c->session;
1359 	if (s != NULL)
1360 		format_add(ft, "client_session", "%s", s->name);
1361 	s = c->last_session;
1362 	if (s != NULL && session_alive(s))
1363 		format_add(ft, "client_last_session", "%s", s->name);
1364 }
1365 
1366 /* Set default format keys for a window. */
1367 void
1368 format_defaults_window(struct format_tree *ft, struct window *w)
1369 {
1370 	ft->w = w;
1371 
1372 	format_add_tv(ft, "window_activity", &w->activity_time);
1373 	format_add(ft, "window_id", "@%u", w->id);
1374 	format_add(ft, "window_name", "%s", w->name);
1375 	format_add(ft, "window_width", "%u", w->sx);
1376 	format_add(ft, "window_height", "%u", w->sy);
1377 	format_add_cb(ft, "window_layout", format_cb_window_layout);
1378 	format_add_cb(ft, "window_visible_layout",
1379 	    format_cb_window_visible_layout);
1380 	format_add(ft, "window_panes", "%u", window_count_panes(w));
1381 	format_add(ft, "window_zoomed_flag", "%d",
1382 	    !!(w->flags & WINDOW_ZOOMED));
1383 }
1384 
1385 /* Set default format keys for a winlink. */
1386 static void
1387 format_defaults_winlink(struct format_tree *ft, struct winlink *wl)
1388 {
1389 	struct session	*s = wl->session;
1390 	struct window	*w = wl->window;
1391 
1392 	if (ft->w == NULL)
1393 		ft->w = wl->window;
1394 	ft->wl = wl;
1395 
1396 	format_defaults_window(ft, w);
1397 
1398 	format_add(ft, "window_index", "%d", wl->idx);
1399 	format_add_cb(ft, "window_stack_index", format_cb_window_stack_index);
1400 	format_add(ft, "window_flags", "%s", window_printable_flags(wl));
1401 	format_add(ft, "window_active", "%d", wl == s->curw);
1402 
1403 	format_add(ft, "window_bell_flag", "%d",
1404 	    !!(wl->flags & WINLINK_BELL));
1405 	format_add(ft, "window_activity_flag", "%d",
1406 	    !!(wl->flags & WINLINK_ACTIVITY));
1407 	format_add(ft, "window_silence_flag", "%d",
1408 	    !!(wl->flags & WINLINK_SILENCE));
1409 	format_add(ft, "window_last_flag", "%d",
1410 	    !!(wl == TAILQ_FIRST(&s->lastw)));
1411 	format_add(ft, "window_linked", "%d", session_is_linked(s, wl->window));
1412 }
1413 
1414 /* Set default format keys for a window pane. */
1415 void
1416 format_defaults_pane(struct format_tree *ft, struct window_pane *wp)
1417 {
1418 	struct grid	*gd = wp->base.grid;
1419 	int  		 status = wp->status;
1420 	u_int		 idx;
1421 
1422 	if (ft->w == NULL)
1423 		ft->w = wp->window;
1424 	ft->wp = wp;
1425 
1426 	format_add(ft, "history_size", "%u", gd->hsize);
1427 	format_add(ft, "history_limit", "%u", gd->hlimit);
1428 	format_add_cb(ft, "history_bytes", format_cb_history_bytes);
1429 
1430 	if (window_pane_index(wp, &idx) != 0)
1431 		fatalx("index not found");
1432 	format_add(ft, "pane_index", "%u", idx);
1433 
1434 	format_add(ft, "pane_width", "%u", wp->sx);
1435 	format_add(ft, "pane_height", "%u", wp->sy);
1436 	format_add(ft, "pane_title", "%s", wp->base.title);
1437 	format_add(ft, "pane_id", "%%%u", wp->id);
1438 	format_add(ft, "pane_active", "%d", wp == wp->window->active);
1439 	format_add(ft, "pane_input_off", "%d", !!(wp->flags & PANE_INPUTOFF));
1440 	format_add(ft, "pane_pipe", "%d", wp->pipe_fd != -1);
1441 
1442 	if ((wp->flags & PANE_STATUSREADY) && WIFEXITED(status))
1443 		format_add(ft, "pane_dead_status", "%d", WEXITSTATUS(status));
1444 	format_add(ft, "pane_dead", "%d", wp->fd == -1);
1445 
1446 	if (window_pane_visible(wp)) {
1447 		format_add(ft, "pane_left", "%u", wp->xoff);
1448 		format_add(ft, "pane_top", "%u", wp->yoff);
1449 		format_add(ft, "pane_right", "%u", wp->xoff + wp->sx - 1);
1450 		format_add(ft, "pane_bottom", "%u", wp->yoff + wp->sy - 1);
1451 		format_add(ft, "pane_at_left", "%d", wp->xoff == 0);
1452 		format_add(ft, "pane_at_top", "%d", wp->yoff == 0);
1453 		format_add(ft, "pane_at_right", "%d",
1454 		    wp->xoff + wp->sx == wp->window->sx);
1455 		format_add(ft, "pane_at_bottom", "%d",
1456 		    wp->yoff + wp->sy == wp->window->sy);
1457 	}
1458 
1459 	format_add(ft, "pane_in_mode", "%d", wp->screen != &wp->base);
1460 	if (wp->mode != NULL)
1461 		format_add(ft, "pane_mode", "%s", wp->mode->name);
1462 
1463 	format_add(ft, "pane_synchronized", "%d",
1464 	    !!options_get_number(wp->window->options, "synchronize-panes"));
1465 	if (wp->searchstr != NULL)
1466 		format_add(ft, "pane_search_string", "%s", wp->searchstr);
1467 
1468 	format_add(ft, "pane_tty", "%s", wp->tty);
1469 	format_add(ft, "pane_pid", "%ld", (long) wp->pid);
1470 	format_add_cb(ft, "pane_start_command", format_cb_start_command);
1471 	format_add_cb(ft, "pane_current_command", format_cb_current_command);
1472 
1473 	format_add(ft, "cursor_x", "%u", wp->base.cx);
1474 	format_add(ft, "cursor_y", "%u", wp->base.cy);
1475 	format_add(ft, "scroll_region_upper", "%u", wp->base.rupper);
1476 	format_add(ft, "scroll_region_lower", "%u", wp->base.rlower);
1477 
1478 	window_copy_add_formats(wp, ft);
1479 
1480 	format_add(ft, "alternate_on", "%d", wp->saved_grid ? 1 : 0);
1481 	format_add(ft, "alternate_saved_x", "%u", wp->saved_cx);
1482 	format_add(ft, "alternate_saved_y", "%u", wp->saved_cy);
1483 
1484 	format_add(ft, "cursor_flag", "%d",
1485 	    !!(wp->base.mode & MODE_CURSOR));
1486 	format_add(ft, "insert_flag", "%d",
1487 	    !!(wp->base.mode & MODE_INSERT));
1488 	format_add(ft, "keypad_cursor_flag", "%d",
1489 	    !!(wp->base.mode & MODE_KCURSOR));
1490 	format_add(ft, "keypad_flag", "%d",
1491 	    !!(wp->base.mode & MODE_KKEYPAD));
1492 	format_add(ft, "wrap_flag", "%d",
1493 	    !!(wp->base.mode & MODE_WRAP));
1494 
1495 	format_add(ft, "mouse_any_flag", "%d",
1496 	    !!(wp->base.mode & ALL_MOUSE_MODES));
1497 	format_add(ft, "mouse_standard_flag", "%d",
1498 	    !!(wp->base.mode & MODE_MOUSE_STANDARD));
1499 	format_add(ft, "mouse_button_flag", "%d",
1500 	    !!(wp->base.mode & MODE_MOUSE_BUTTON));
1501 	format_add(ft, "mouse_all_flag", "%d",
1502 	    !!(wp->base.mode & MODE_MOUSE_ALL));
1503 
1504 	format_add_cb(ft, "pane_tabs", format_cb_pane_tabs);
1505 }
1506 
1507 /* Set default format keys for paste buffer. */
1508 void
1509 format_defaults_paste_buffer(struct format_tree *ft, struct paste_buffer *pb)
1510 {
1511 	struct timeval	 tv;
1512 	size_t		 size;
1513 	char		*s;
1514 
1515 	timerclear(&tv);
1516 	tv.tv_sec = paste_buffer_created(pb);
1517 	paste_buffer_data(pb, &size);
1518 
1519 	format_add(ft, "buffer_size", "%zu", size);
1520 	format_add(ft, "buffer_name", "%s", paste_buffer_name(pb));
1521 	format_add_tv(ft, "buffer_created", &tv);
1522 
1523 	s = paste_make_sample(pb);
1524 	format_add(ft, "buffer_sample", "%s", s);
1525 	free(s);
1526 }
1527