options.c revision 1.62 
1/* $OpenBSD: options.c,v 1.62 2021/03/11 06:31:05 nicm Exp $ */
2
3/*
4 * Copyright (c) 2008 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
21#include <ctype.h>
22#include <fnmatch.h>
23#include <stdarg.h>
24#include <stdlib.h>
25#include <string.h>
26
27#include "tmux.h"
28
29/*
30 * Option handling; each option has a name, type and value and is stored in
31 * a red-black tree.
32 */
33
34struct options_array_item {
35	u_int				 index;
36	union options_value		 value;
37	RB_ENTRY(options_array_item)	 entry;
38};
39static int
40options_array_cmp(struct options_array_item *a1, struct options_array_item *a2)
41{
42	if (a1->index < a2->index)
43		return (-1);
44	if (a1->index > a2->index)
45		return (1);
46	return (0);
47}
48RB_GENERATE_STATIC(options_array, options_array_item, entry, options_array_cmp);
49
50struct options_entry {
51	struct options				*owner;
52
53	const char				*name;
54	const struct options_table_entry	*tableentry;
55	union options_value			 value;
56
57	int					 cached;
58	struct style				 style;
59
60	RB_ENTRY(options_entry)			 entry;
61};
62
63struct options {
64	RB_HEAD(options_tree, options_entry)	 tree;
65	struct options				*parent;
66};
67
68static struct options_entry	*options_add(struct options *, const char *);
69static void			 options_remove(struct options_entry *);
70
71#define OPTIONS_IS_STRING(o)						\
72	((o)->tableentry == NULL ||					\
73	    (o)->tableentry->type == OPTIONS_TABLE_STRING)
74#define OPTIONS_IS_NUMBER(o) \
75	((o)->tableentry != NULL &&					\
76	    ((o)->tableentry->type == OPTIONS_TABLE_NUMBER ||		\
77	    (o)->tableentry->type == OPTIONS_TABLE_KEY ||		\
78	    (o)->tableentry->type == OPTIONS_TABLE_COLOUR ||		\
79	    (o)->tableentry->type == OPTIONS_TABLE_FLAG ||		\
80	    (o)->tableentry->type == OPTIONS_TABLE_CHOICE))
81#define OPTIONS_IS_COMMAND(o) \
82	((o)->tableentry != NULL &&					\
83	    (o)->tableentry->type == OPTIONS_TABLE_COMMAND)
84
85#define OPTIONS_IS_ARRAY(o)						\
86	((o)->tableentry != NULL &&					\
87	    ((o)->tableentry->flags & OPTIONS_TABLE_IS_ARRAY))
88
89static int	options_cmp(struct options_entry *, struct options_entry *);
90RB_GENERATE_STATIC(options_tree, options_entry, entry, options_cmp);
91
92static int
93options_cmp(struct options_entry *lhs, struct options_entry *rhs)
94{
95	return (strcmp(lhs->name, rhs->name));
96}
97
98static const char *
99options_map_name(const char *name)
100{
101	const struct options_name_map	*map;
102
103	for (map = options_other_names; map->from != NULL; map++) {
104		if (strcmp(map->from, name) == 0)
105			return (map->to);
106	}
107	return (name);
108}
109
110static const struct options_table_entry *
111options_parent_table_entry(struct options *oo, const char *s)
112{
113	struct options_entry	*o;
114
115	if (oo->parent == NULL)
116		fatalx("no parent options for %s", s);
117	o = options_get(oo->parent, s);
118	if (o == NULL)
119		fatalx("%s not in parent options", s);
120	return (o->tableentry);
121}
122
123static void
124options_value_free(struct options_entry *o, union options_value *ov)
125{
126	if (OPTIONS_IS_STRING(o))
127		free(ov->string);
128	if (OPTIONS_IS_COMMAND(o) && ov->cmdlist != NULL)
129		cmd_list_free(ov->cmdlist);
130}
131
132static char *
133options_value_to_string(struct options_entry *o, union options_value *ov,
134    int numeric)
135{
136	char	*s;
137
138	if (OPTIONS_IS_COMMAND(o))
139		return (cmd_list_print(ov->cmdlist, 0));
140	if (OPTIONS_IS_NUMBER(o)) {
141		switch (o->tableentry->type) {
142		case OPTIONS_TABLE_NUMBER:
143			xasprintf(&s, "%lld", ov->number);
144			break;
145		case OPTIONS_TABLE_KEY:
146			s = xstrdup(key_string_lookup_key(ov->number, 0));
147			break;
148		case OPTIONS_TABLE_COLOUR:
149			s = xstrdup(colour_tostring(ov->number));
150			break;
151		case OPTIONS_TABLE_FLAG:
152			if (numeric)
153				xasprintf(&s, "%lld", ov->number);
154			else
155				s = xstrdup(ov->number ? "on" : "off");
156			break;
157		case OPTIONS_TABLE_CHOICE:
158			s = xstrdup(o->tableentry->choices[ov->number]);
159			break;
160		default:
161			fatalx("not a number option type");
162		}
163		return (s);
164	}
165	if (OPTIONS_IS_STRING(o))
166		return (xstrdup(ov->string));
167	return (xstrdup(""));
168}
169
170struct options *
171options_create(struct options *parent)
172{
173	struct options	*oo;
174
175	oo = xcalloc(1, sizeof *oo);
176	RB_INIT(&oo->tree);
177	oo->parent = parent;
178	return (oo);
179}
180
181void
182options_free(struct options *oo)
183{
184	struct options_entry	*o, *tmp;
185
186	RB_FOREACH_SAFE(o, options_tree, &oo->tree, tmp)
187		options_remove(o);
188	free(oo);
189}
190
191struct options *
192options_get_parent(struct options *oo)
193{
194	return (oo->parent);
195}
196
197void
198options_set_parent(struct options *oo, struct options *parent)
199{
200	oo->parent = parent;
201}
202
203struct options_entry *
204options_first(struct options *oo)
205{
206	return (RB_MIN(options_tree, &oo->tree));
207}
208
209struct options_entry *
210options_next(struct options_entry *o)
211{
212	return (RB_NEXT(options_tree, &oo->tree, o));
213}
214
215struct options_entry *
216options_get_only(struct options *oo, const char *name)
217{
218	struct options_entry	o = { .name = name }, *found;
219
220	found = RB_FIND(options_tree, &oo->tree, &o);
221	if (found == NULL) {
222		o.name = options_map_name(name);
223		return (RB_FIND(options_tree, &oo->tree, &o));
224	}
225	return (found);
226}
227
228struct options_entry *
229options_get(struct options *oo, const char *name)
230{
231	struct options_entry	*o;
232
233	o = options_get_only(oo, name);
234	while (o == NULL) {
235		oo = oo->parent;
236		if (oo == NULL)
237			break;
238		o = options_get_only(oo, name);
239	}
240	return (o);
241}
242
243struct options_entry *
244options_empty(struct options *oo, const struct options_table_entry *oe)
245{
246	struct options_entry	*o;
247
248	o = options_add(oo, oe->name);
249	o->tableentry = oe;
250
251	if (oe->flags & OPTIONS_TABLE_IS_ARRAY)
252		RB_INIT(&o->value.array);
253
254	return (o);
255}
256
257struct options_entry *
258options_default(struct options *oo, const struct options_table_entry *oe)
259{
260	struct options_entry	*o;
261	union options_value	*ov;
262	u_int			 i;
263
264	o = options_empty(oo, oe);
265	ov = &o->value;
266
267	if (oe->flags & OPTIONS_TABLE_IS_ARRAY) {
268		if (oe->default_arr == NULL) {
269			options_array_assign(o, oe->default_str, NULL);
270			return (o);
271		}
272		for (i = 0; oe->default_arr[i] != NULL; i++)
273			options_array_set(o, i, oe->default_arr[i], 0, NULL);
274		return (o);
275	}
276
277	switch (oe->type) {
278	case OPTIONS_TABLE_STRING:
279		ov->string = xstrdup(oe->default_str);
280		break;
281	default:
282		ov->number = oe->default_num;
283		break;
284	}
285	return (o);
286}
287
288char *
289options_default_to_string(const struct options_table_entry *oe)
290{
291	char	*s;
292
293	switch (oe->type) {
294	case OPTIONS_TABLE_STRING:
295	case OPTIONS_TABLE_COMMAND:
296		s = xstrdup(oe->default_str);
297		break;
298	case OPTIONS_TABLE_NUMBER:
299		xasprintf(&s, "%lld", oe->default_num);
300		break;
301	case OPTIONS_TABLE_KEY:
302		s = xstrdup(key_string_lookup_key(oe->default_num, 0));
303		break;
304	case OPTIONS_TABLE_COLOUR:
305		s = xstrdup(colour_tostring(oe->default_num));
306		break;
307	case OPTIONS_TABLE_FLAG:
308		s = xstrdup(oe->default_num ? "on" : "off");
309		break;
310	case OPTIONS_TABLE_CHOICE:
311		s = xstrdup(oe->choices[oe->default_num]);
312		break;
313	default:
314		fatalx("unknown option type");
315	}
316	return (s);
317}
318
319static struct options_entry *
320options_add(struct options *oo, const char *name)
321{
322	struct options_entry	*o;
323
324	o = options_get_only(oo, name);
325	if (o != NULL)
326		options_remove(o);
327
328	o = xcalloc(1, sizeof *o);
329	o->owner = oo;
330	o->name = xstrdup(name);
331
332	RB_INSERT(options_tree, &oo->tree, o);
333	return (o);
334}
335
336static void
337options_remove(struct options_entry *o)
338{
339	struct options	*oo = o->owner;
340
341	if (OPTIONS_IS_ARRAY(o))
342		options_array_clear(o);
343	else
344		options_value_free(o, &o->value);
345	RB_REMOVE(options_tree, &oo->tree, o);
346	free((void *)o->name);
347	free(o);
348}
349
350const char *
351options_name(struct options_entry *o)
352{
353	return (o->name);
354}
355
356struct options *
357options_owner(struct options_entry *o)
358{
359	return (o->owner);
360}
361
362const struct options_table_entry *
363options_table_entry(struct options_entry *o)
364{
365	return (o->tableentry);
366}
367
368static struct options_array_item *
369options_array_item(struct options_entry *o, u_int idx)
370{
371	struct options_array_item	a;
372
373	a.index = idx;
374	return (RB_FIND(options_array, &o->value.array, &a));
375}
376
377static struct options_array_item *
378options_array_new(struct options_entry *o, u_int idx)
379{
380	struct options_array_item	*a;
381
382	a = xcalloc(1, sizeof *a);
383	a->index = idx;
384	RB_INSERT(options_array, &o->value.array, a);
385	return (a);
386}
387
388static void
389options_array_free(struct options_entry *o, struct options_array_item *a)
390{
391	options_value_free(o, &a->value);
392	RB_REMOVE(options_array, &o->value.array, a);
393	free(a);
394}
395
396void
397options_array_clear(struct options_entry *o)
398{
399	struct options_array_item	*a, *a1;
400
401	if (!OPTIONS_IS_ARRAY(o))
402		return;
403
404	RB_FOREACH_SAFE(a, options_array, &o->value.array, a1)
405	    options_array_free(o, a);
406}
407
408union options_value *
409options_array_get(struct options_entry *o, u_int idx)
410{
411	struct options_array_item	*a;
412
413	if (!OPTIONS_IS_ARRAY(o))
414		return (NULL);
415	a = options_array_item(o, idx);
416	if (a == NULL)
417		return (NULL);
418	return (&a->value);
419}
420
421int
422options_array_set(struct options_entry *o, u_int idx, const char *value,
423    int append, char **cause)
424{
425	struct options_array_item	*a;
426	char				*new;
427	struct cmd_parse_result		*pr;
428
429	if (!OPTIONS_IS_ARRAY(o)) {
430		if (cause != NULL)
431			*cause = xstrdup("not an array");
432		return (-1);
433	}
434
435	if (value == NULL) {
436		a = options_array_item(o, idx);
437		if (a != NULL)
438			options_array_free(o, a);
439		return (0);
440	}
441
442	if (OPTIONS_IS_COMMAND(o)) {
443		pr = cmd_parse_from_string(value, NULL);
444		switch (pr->status) {
445		case CMD_PARSE_EMPTY:
446			if (cause != NULL)
447				*cause = xstrdup("empty command");
448			return (-1);
449		case CMD_PARSE_ERROR:
450			if (cause != NULL)
451				*cause = pr->error;
452			else
453				free(pr->error);
454			return (-1);
455		case CMD_PARSE_SUCCESS:
456			break;
457		}
458
459		a = options_array_item(o, idx);
460		if (a == NULL)
461			a = options_array_new(o, idx);
462		else
463			options_value_free(o, &a->value);
464		a->value.cmdlist = pr->cmdlist;
465		return (0);
466	}
467
468	if (OPTIONS_IS_STRING(o)) {
469		a = options_array_item(o, idx);
470		if (a != NULL && append)
471			xasprintf(&new, "%s%s", a->value.string, value);
472		else
473			new = xstrdup(value);
474		if (a == NULL)
475			a = options_array_new(o, idx);
476		else
477			options_value_free(o, &a->value);
478		a->value.string = new;
479		return (0);
480	}
481
482	if (cause != NULL)
483		*cause = xstrdup("wrong array type");
484	return (-1);
485}
486
487int
488options_array_assign(struct options_entry *o, const char *s, char **cause)
489{
490	const char	*separator;
491	char		*copy, *next, *string;
492	u_int		 i;
493
494	separator = o->tableentry->separator;
495	if (separator == NULL)
496		separator = " ,";
497	if (*separator == '\0') {
498		if (*s == '\0')
499			return (0);
500		for (i = 0; i < UINT_MAX; i++) {
501			if (options_array_item(o, i) == NULL)
502				break;
503		}
504		return (options_array_set(o, i, s, 0, cause));
505	}
506
507	if (*s == '\0')
508		return (0);
509	copy = string = xstrdup(s);
510	while ((next = strsep(&string, separator)) != NULL) {
511		if (*next == '\0')
512			continue;
513		for (i = 0; i < UINT_MAX; i++) {
514			if (options_array_item(o, i) == NULL)
515				break;
516		}
517		if (i == UINT_MAX)
518			break;
519		if (options_array_set(o, i, next, 0, cause) != 0) {
520			free(copy);
521			return (-1);
522		}
523	}
524	free(copy);
525	return (0);
526}
527
528struct options_array_item *
529options_array_first(struct options_entry *o)
530{
531	if (!OPTIONS_IS_ARRAY(o))
532		return (NULL);
533	return (RB_MIN(options_array, &o->value.array));
534}
535
536struct options_array_item *
537options_array_next(struct options_array_item *a)
538{
539	return (RB_NEXT(options_array, &o->value.array, a));
540}
541
542u_int
543options_array_item_index(struct options_array_item *a)
544{
545	return (a->index);
546}
547
548union options_value *
549options_array_item_value(struct options_array_item *a)
550{
551	return (&a->value);
552}
553
554int
555options_is_array(struct options_entry *o)
556{
557	return (OPTIONS_IS_ARRAY(o));
558}
559
560int
561options_is_string(struct options_entry *o)
562{
563	return (OPTIONS_IS_STRING(o));
564}
565
566char *
567options_to_string(struct options_entry *o, int idx, int numeric)
568{
569	struct options_array_item	*a;
570
571	if (OPTIONS_IS_ARRAY(o)) {
572		if (idx == -1)
573			return (xstrdup(""));
574		a = options_array_item(o, idx);
575		if (a == NULL)
576			return (xstrdup(""));
577		return (options_value_to_string(o, &a->value, numeric));
578	}
579	return (options_value_to_string(o, &o->value, numeric));
580}
581
582char *
583options_parse(const char *name, int *idx)
584{
585	char	*copy, *cp, *end;
586
587	if (*name == '\0')
588		return (NULL);
589	copy = xstrdup(name);
590	if ((cp = strchr(copy, '[')) == NULL) {
591		*idx = -1;
592		return (copy);
593	}
594	end = strchr(cp + 1, ']');
595	if (end == NULL || end[1] != '\0' || !isdigit((u_char)end[-1])) {
596		free(copy);
597		return (NULL);
598	}
599	if (sscanf(cp, "[%d]", idx) != 1 || *idx < 0) {
600		free(copy);
601		return (NULL);
602	}
603	*cp = '\0';
604	return (copy);
605}
606
607struct options_entry *
608options_parse_get(struct options *oo, const char *s, int *idx, int only)
609{
610	struct options_entry	*o;
611	char			*name;
612
613	name = options_parse(s, idx);
614	if (name == NULL)
615		return (NULL);
616	if (only)
617		o = options_get_only(oo, name);
618	else
619		o = options_get(oo, name);
620	free(name);
621	return (o);
622}
623
624char *
625options_match(const char *s, int *idx, int *ambiguous)
626{
627	const struct options_table_entry	*oe, *found;
628	char					*parsed;
629	const char				*name;
630	size_t					 namelen;
631
632	parsed = options_parse(s, idx);
633	if (parsed == NULL)
634		return (NULL);
635	if (*parsed == '@') {
636		*ambiguous = 0;
637		return (parsed);
638	}
639
640	name = options_map_name(parsed);
641	namelen = strlen(name);
642
643	found = NULL;
644	for (oe = options_table; oe->name != NULL; oe++) {
645		if (strcmp(oe->name, name) == 0) {
646			found = oe;
647			break;
648		}
649		if (strncmp(oe->name, name, namelen) == 0) {
650			if (found != NULL) {
651				*ambiguous = 1;
652				free(parsed);
653				return (NULL);
654			}
655			found = oe;
656		}
657	}
658	free(parsed);
659	if (found == NULL) {
660		*ambiguous = 0;
661		return (NULL);
662	}
663	return (xstrdup(found->name));
664}
665
666struct options_entry *
667options_match_get(struct options *oo, const char *s, int *idx, int only,
668    int *ambiguous)
669{
670	char			*name;
671	struct options_entry	*o;
672
673	name = options_match(s, idx, ambiguous);
674	if (name == NULL)
675		return (NULL);
676	*ambiguous = 0;
677	if (only)
678		o = options_get_only(oo, name);
679	else
680		o = options_get(oo, name);
681	free(name);
682	return (o);
683}
684
685const char *
686options_get_string(struct options *oo, const char *name)
687{
688	struct options_entry	*o;
689
690	o = options_get(oo, name);
691	if (o == NULL)
692		fatalx("missing option %s", name);
693	if (!OPTIONS_IS_STRING(o))
694		fatalx("option %s is not a string", name);
695	return (o->value.string);
696}
697
698long long
699options_get_number(struct options *oo, const char *name)
700{
701	struct options_entry	*o;
702
703	o = options_get(oo, name);
704	if (o == NULL)
705		fatalx("missing option %s", name);
706	if (!OPTIONS_IS_NUMBER(o))
707		fatalx("option %s is not a number", name);
708	return (o->value.number);
709}
710
711struct options_entry *
712options_set_string(struct options *oo, const char *name, int append,
713    const char *fmt, ...)
714{
715	struct options_entry	*o;
716	va_list			 ap;
717	const char		*separator = "";
718	char			*s, *value;
719
720	va_start(ap, fmt);
721	xvasprintf(&s, fmt, ap);
722	va_end(ap);
723
724	o = options_get_only(oo, name);
725	if (o != NULL && append && OPTIONS_IS_STRING(o)) {
726		if (*name != '@') {
727			separator = o->tableentry->separator;
728			if (separator == NULL)
729				separator = "";
730		}
731		xasprintf(&value, "%s%s%s", o->value.string, separator, s);
732		free(s);
733	} else
734		value = s;
735	if (o == NULL && *name == '@')
736		o = options_add(oo, name);
737	else if (o == NULL) {
738		o = options_default(oo, options_parent_table_entry(oo, name));
739		if (o == NULL)
740			return (NULL);
741	}
742
743	if (!OPTIONS_IS_STRING(o))
744		fatalx("option %s is not a string", name);
745	free(o->value.string);
746	o->value.string = value;
747	o->cached = 0;
748	return (o);
749}
750
751struct options_entry *
752options_set_number(struct options *oo, const char *name, long long value)
753{
754	struct options_entry	*o;
755
756	if (*name == '@')
757		fatalx("user option %s must be a string", name);
758
759	o = options_get_only(oo, name);
760	if (o == NULL) {
761		o = options_default(oo, options_parent_table_entry(oo, name));
762		if (o == NULL)
763			return (NULL);
764	}
765
766	if (!OPTIONS_IS_NUMBER(o))
767		fatalx("option %s is not a number", name);
768	o->value.number = value;
769	return (o);
770}
771
772int
773options_scope_from_name(struct args *args, int window,
774    const char *name, struct cmd_find_state *fs, struct options **oo,
775    char **cause)
776{
777	struct session				*s = fs->s;
778	struct winlink				*wl = fs->wl;
779	struct window_pane			*wp = fs->wp;
780	const char				*target = args_get(args, 't');
781	const struct options_table_entry	*oe;
782	int					 scope = OPTIONS_TABLE_NONE;
783
784	if (*name == '@')
785		return (options_scope_from_flags(args, window, fs, oo, cause));
786
787	for (oe = options_table; oe->name != NULL; oe++) {
788		if (strcmp(oe->name, name) == 0)
789			break;
790	}
791	if (oe->name == NULL) {
792		xasprintf(cause, "unknown option: %s", name);
793		return (OPTIONS_TABLE_NONE);
794	}
795	switch (oe->scope) {
796	case OPTIONS_TABLE_SERVER:
797		*oo = global_options;
798		scope = OPTIONS_TABLE_SERVER;
799		break;
800	case OPTIONS_TABLE_SESSION:
801		if (args_has(args, 'g')) {
802			*oo = global_s_options;
803			scope = OPTIONS_TABLE_SESSION;
804		} else if (s == NULL && target != NULL)
805			xasprintf(cause, "no such session: %s", target);
806		else if (s == NULL)
807			xasprintf(cause, "no current session");
808		else {
809			*oo = s->options;
810			scope = OPTIONS_TABLE_SESSION;
811		}
812		break;
813	case OPTIONS_TABLE_WINDOW|OPTIONS_TABLE_PANE:
814		if (args_has(args, 'p')) {
815			if (wp == NULL && target != NULL)
816				xasprintf(cause, "no such pane: %s", target);
817			else if (wp == NULL)
818				xasprintf(cause, "no current pane");
819			else {
820				*oo = wp->options;
821				scope = OPTIONS_TABLE_PANE;
822			}
823			break;
824		}
825		/* FALLTHROUGH */
826	case OPTIONS_TABLE_WINDOW:
827		if (args_has(args, 'g')) {
828			*oo = global_w_options;
829			scope = OPTIONS_TABLE_WINDOW;
830		} else if (wl == NULL && target != NULL)
831			xasprintf(cause, "no such window: %s", target);
832		else if (wl == NULL)
833			xasprintf(cause, "no current window");
834		else {
835			*oo = wl->window->options;
836			scope = OPTIONS_TABLE_WINDOW;
837		}
838		break;
839	}
840	return (scope);
841}
842
843int
844options_scope_from_flags(struct args *args, int window,
845    struct cmd_find_state *fs, struct options **oo, char **cause)
846{
847	struct session		*s = fs->s;
848	struct winlink		*wl = fs->wl;
849	struct window_pane	*wp = fs->wp;
850	const char		*target = args_get(args, 't');
851
852	if (args_has(args, 's')) {
853		*oo = global_options;
854		return (OPTIONS_TABLE_SERVER);
855	}
856
857	if (args_has(args, 'p')) {
858		if (wp == NULL) {
859			if (target != NULL)
860				xasprintf(cause, "no such pane: %s", target);
861			else
862				xasprintf(cause, "no current pane");
863			return (OPTIONS_TABLE_NONE);
864		}
865		*oo = wp->options;
866		return (OPTIONS_TABLE_PANE);
867	} else if (window || args_has(args, 'w')) {
868		if (args_has(args, 'g')) {
869			*oo = global_w_options;
870			return (OPTIONS_TABLE_WINDOW);
871		}
872		if (wl == NULL) {
873			if (target != NULL)
874				xasprintf(cause, "no such window: %s", target);
875			else
876				xasprintf(cause, "no current window");
877			return (OPTIONS_TABLE_NONE);
878		}
879		*oo = wl->window->options;
880		return (OPTIONS_TABLE_WINDOW);
881	} else {
882		if (args_has(args, 'g')) {
883			*oo = global_s_options;
884			return (OPTIONS_TABLE_SESSION);
885		}
886		if (s == NULL) {
887			if (target != NULL)
888				xasprintf(cause, "no such session: %s", target);
889			else
890				xasprintf(cause, "no current session");
891			return (OPTIONS_TABLE_NONE);
892		}
893		*oo = s->options;
894		return (OPTIONS_TABLE_SESSION);
895	}
896}
897
898struct style *
899options_string_to_style(struct options *oo, const char *name,
900    struct format_tree *ft)
901{
902	struct options_entry	*o;
903	const char		*s;
904	char			*expanded;
905
906	o = options_get(oo, name);
907	if (o == NULL || !OPTIONS_IS_STRING(o))
908		return (NULL);
909
910	if (o->cached)
911		return (&o->style);
912	s = o->value.string;
913	log_debug("%s: %s is '%s'", __func__, name, s);
914
915	style_set(&o->style, &grid_default_cell);
916	o->cached = (strstr(s, "#{") == NULL);
917
918	if (ft != NULL && !o->cached) {
919		expanded = format_expand(ft, s);
920		if (style_parse(&o->style, &grid_default_cell, expanded) != 0) {
921			free(expanded);
922			return (NULL);
923		}
924		free(expanded);
925	} else {
926		if (style_parse(&o->style, &grid_default_cell, s) != 0)
927			return (NULL);
928	}
929	return (&o->style);
930}
931
932static int
933options_from_string_check(const struct options_table_entry *oe,
934    const char *value, char **cause)
935{
936	struct style	sy;
937
938	if (oe == NULL)
939		return (0);
940	if (strcmp(oe->name, "default-shell") == 0 && !checkshell(value)) {
941		xasprintf(cause, "not a suitable shell: %s", value);
942		return (-1);
943	}
944	if (oe->pattern != NULL && fnmatch(oe->pattern, value, 0) != 0) {
945		xasprintf(cause, "value is invalid: %s", value);
946		return (-1);
947	}
948	if ((oe->flags & OPTIONS_TABLE_IS_STYLE) &&
949	    strstr(value, "#{") == NULL &&
950	    style_parse(&sy, &grid_default_cell, value) != 0) {
951		xasprintf(cause, "invalid style: %s", value);
952		return (-1);
953	}
954	return (0);
955}
956
957static int
958options_from_string_flag(struct options *oo, const char *name,
959    const char *value, char **cause)
960{
961	int	flag;
962
963	if (value == NULL || *value == '\0')
964		flag = !options_get_number(oo, name);
965	else if (strcmp(value, "1") == 0 ||
966	    strcasecmp(value, "on") == 0 ||
967	    strcasecmp(value, "yes") == 0)
968		flag = 1;
969	else if (strcmp(value, "0") == 0 ||
970	    strcasecmp(value, "off") == 0 ||
971	    strcasecmp(value, "no") == 0)
972		flag = 0;
973	else {
974		xasprintf(cause, "bad value: %s", value);
975		return (-1);
976	}
977	options_set_number(oo, name, flag);
978	return (0);
979}
980
981static int
982options_from_string_choice(const struct options_table_entry *oe,
983    struct options *oo, const char *name, const char *value, char **cause)
984{
985	const char	**cp;
986	int		  n, choice = -1;
987
988	if (value == NULL) {
989		choice = options_get_number(oo, name);
990		if (choice < 2)
991			choice = !choice;
992	} else {
993		n = 0;
994		for (cp = oe->choices; *cp != NULL; cp++) {
995			if (strcmp(*cp, value) == 0)
996				choice = n;
997			n++;
998		}
999		if (choice == -1) {
1000			xasprintf(cause, "unknown value: %s", value);
1001			return (-1);
1002		}
1003	}
1004	options_set_number(oo, name, choice);
1005	return (0);
1006}
1007
1008int
1009options_from_string(struct options *oo, const struct options_table_entry *oe,
1010    const char *name, const char *value, int append, char **cause)
1011{
1012	enum options_table_type	 type;
1013	long long		 number;
1014	const char		*errstr, *new;
1015	char			*old;
1016	key_code		 key;
1017
1018	if (oe != NULL) {
1019		if (value == NULL &&
1020		    oe->type != OPTIONS_TABLE_FLAG &&
1021		    oe->type != OPTIONS_TABLE_CHOICE) {
1022			xasprintf(cause, "empty value");
1023			return (-1);
1024		}
1025		type = oe->type;
1026	} else {
1027		if (*name != '@') {
1028			xasprintf(cause, "bad option name");
1029			return (-1);
1030		}
1031		type = OPTIONS_TABLE_STRING;
1032	}
1033
1034	switch (type) {
1035	case OPTIONS_TABLE_STRING:
1036		old = xstrdup(options_get_string(oo, name));
1037		options_set_string(oo, name, append, "%s", value);
1038
1039		new = options_get_string(oo, name);
1040		if (options_from_string_check(oe, new, cause) != 0) {
1041			options_set_string(oo, name, 0, "%s", old);
1042			free(old);
1043			return (-1);
1044		}
1045		free(old);
1046		return (0);
1047	case OPTIONS_TABLE_NUMBER:
1048		number = strtonum(value, oe->minimum, oe->maximum, &errstr);
1049		if (errstr != NULL) {
1050			xasprintf(cause, "value is %s: %s", errstr, value);
1051			return (-1);
1052		}
1053		options_set_number(oo, name, number);
1054		return (0);
1055	case OPTIONS_TABLE_KEY:
1056		key = key_string_lookup_string(value);
1057		if (key == KEYC_UNKNOWN) {
1058			xasprintf(cause, "bad key: %s", value);
1059			return (-1);
1060		}
1061		options_set_number(oo, name, key);
1062		return (0);
1063	case OPTIONS_TABLE_COLOUR:
1064		if ((number = colour_fromstring(value)) == -1) {
1065			xasprintf(cause, "bad colour: %s", value);
1066			return (-1);
1067		}
1068		options_set_number(oo, name, number);
1069		return (0);
1070	case OPTIONS_TABLE_FLAG:
1071		return (options_from_string_flag(oo, name, value, cause));
1072	case OPTIONS_TABLE_CHOICE:
1073		return (options_from_string_choice(oe, oo, name, value, cause));
1074	case OPTIONS_TABLE_COMMAND:
1075		break;
1076	}
1077	return (-1);
1078}
1079
1080void
1081options_push_changes(const char *name)
1082{
1083	struct client		*loop;
1084	struct session		*s;
1085	struct window		*w;
1086	struct window_pane	*wp;
1087
1088	if (strcmp(name, "automatic-rename") == 0) {
1089		RB_FOREACH(w, windows, &windows) {
1090			if (w->active == NULL)
1091				continue;
1092			if (options_get_number(w->options, "automatic-rename"))
1093				w->active->flags |= PANE_CHANGED;
1094		}
1095	}
1096	if (strcmp(name, "key-table") == 0) {
1097		TAILQ_FOREACH(loop, &clients, entry)
1098			server_client_set_key_table(loop, NULL);
1099	}
1100	if (strcmp(name, "user-keys") == 0) {
1101		TAILQ_FOREACH(loop, &clients, entry) {
1102			if (loop->tty.flags & TTY_OPENED)
1103				tty_keys_build(&loop->tty);
1104		}
1105	}
1106	if (strcmp(name, "status") == 0 ||
1107	    strcmp(name, "status-interval") == 0)
1108		status_timer_start_all();
1109	if (strcmp(name, "monitor-silence") == 0)
1110		alerts_reset_all();
1111	if (strcmp(name, "window-style") == 0 ||
1112	    strcmp(name, "window-active-style") == 0) {
1113		RB_FOREACH(wp, window_pane_tree, &all_window_panes)
1114			wp->flags |= PANE_STYLECHANGED;
1115	}
1116	if (strcmp(name, "pane-border-status") == 0) {
1117		RB_FOREACH(w, windows, &windows)
1118			layout_fix_panes(w, NULL);
1119	}
1120	RB_FOREACH(s, sessions, &sessions)
1121		status_update_cache(s);
1122
1123	recalculate_sizes();
1124	TAILQ_FOREACH(loop, &clients, entry) {
1125		if (loop->session != NULL)
1126			server_redraw_client(loop);
1127	}
1128}
1129
1130int
1131options_remove_or_default(struct options_entry *o, int idx, char **cause)
1132{
1133	struct options	*oo = o->owner;
1134
1135	if (idx == -1) {
1136		if (o->tableentry != NULL &&
1137		    (oo == global_options ||
1138		    oo == global_s_options ||
1139		    oo == global_w_options))
1140			options_default(oo, o->tableentry);
1141		else
1142			options_remove(o);
1143	} else if (options_array_set(o, idx, NULL, 0, cause) != 0)
1144		return (-1);
1145	return (0);
1146}
1147