options.c revision 1.63 
1/* $OpenBSD: options.c,v 1.63 2021/08/11 20:49:55 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	long long		 	 number;
429
430	if (!OPTIONS_IS_ARRAY(o)) {
431		if (cause != NULL)
432			*cause = xstrdup("not an array");
433		return (-1);
434	}
435
436	if (value == NULL) {
437		a = options_array_item(o, idx);
438		if (a != NULL)
439			options_array_free(o, a);
440		return (0);
441	}
442
443	if (OPTIONS_IS_COMMAND(o)) {
444		pr = cmd_parse_from_string(value, NULL);
445		switch (pr->status) {
446		case CMD_PARSE_EMPTY:
447			if (cause != NULL)
448				*cause = xstrdup("empty command");
449			return (-1);
450		case CMD_PARSE_ERROR:
451			if (cause != NULL)
452				*cause = pr->error;
453			else
454				free(pr->error);
455			return (-1);
456		case CMD_PARSE_SUCCESS:
457			break;
458		}
459
460		a = options_array_item(o, idx);
461		if (a == NULL)
462			a = options_array_new(o, idx);
463		else
464			options_value_free(o, &a->value);
465		a->value.cmdlist = pr->cmdlist;
466		return (0);
467	}
468
469	if (OPTIONS_IS_STRING(o)) {
470		a = options_array_item(o, idx);
471		if (a != NULL && append)
472			xasprintf(&new, "%s%s", a->value.string, value);
473		else
474			new = xstrdup(value);
475		if (a == NULL)
476			a = options_array_new(o, idx);
477		else
478			options_value_free(o, &a->value);
479		a->value.string = new;
480		return (0);
481	}
482
483	if (o->tableentry->type == OPTIONS_TABLE_COLOUR) {
484		if ((number = colour_fromstring(value)) == -1) {
485			xasprintf(cause, "bad colour: %s", value);
486			return (-1);
487		}
488		a = options_array_item(o, idx);
489		if (a == NULL)
490			a = options_array_new(o, idx);
491		else
492			options_value_free(o, &a->value);
493		a->value.number = number;
494		return (0);
495	}
496
497	if (cause != NULL)
498		*cause = xstrdup("wrong array type");
499	return (-1);
500}
501
502int
503options_array_assign(struct options_entry *o, const char *s, char **cause)
504{
505	const char	*separator;
506	char		*copy, *next, *string;
507	u_int		 i;
508
509	separator = o->tableentry->separator;
510	if (separator == NULL)
511		separator = " ,";
512	if (*separator == '\0') {
513		if (*s == '\0')
514			return (0);
515		for (i = 0; i < UINT_MAX; i++) {
516			if (options_array_item(o, i) == NULL)
517				break;
518		}
519		return (options_array_set(o, i, s, 0, cause));
520	}
521
522	if (*s == '\0')
523		return (0);
524	copy = string = xstrdup(s);
525	while ((next = strsep(&string, separator)) != NULL) {
526		if (*next == '\0')
527			continue;
528		for (i = 0; i < UINT_MAX; i++) {
529			if (options_array_item(o, i) == NULL)
530				break;
531		}
532		if (i == UINT_MAX)
533			break;
534		if (options_array_set(o, i, next, 0, cause) != 0) {
535			free(copy);
536			return (-1);
537		}
538	}
539	free(copy);
540	return (0);
541}
542
543struct options_array_item *
544options_array_first(struct options_entry *o)
545{
546	if (!OPTIONS_IS_ARRAY(o))
547		return (NULL);
548	return (RB_MIN(options_array, &o->value.array));
549}
550
551struct options_array_item *
552options_array_next(struct options_array_item *a)
553{
554	return (RB_NEXT(options_array, &o->value.array, a));
555}
556
557u_int
558options_array_item_index(struct options_array_item *a)
559{
560	return (a->index);
561}
562
563union options_value *
564options_array_item_value(struct options_array_item *a)
565{
566	return (&a->value);
567}
568
569int
570options_is_array(struct options_entry *o)
571{
572	return (OPTIONS_IS_ARRAY(o));
573}
574
575int
576options_is_string(struct options_entry *o)
577{
578	return (OPTIONS_IS_STRING(o));
579}
580
581char *
582options_to_string(struct options_entry *o, int idx, int numeric)
583{
584	struct options_array_item	*a;
585
586	if (OPTIONS_IS_ARRAY(o)) {
587		if (idx == -1)
588			return (xstrdup(""));
589		a = options_array_item(o, idx);
590		if (a == NULL)
591			return (xstrdup(""));
592		return (options_value_to_string(o, &a->value, numeric));
593	}
594	return (options_value_to_string(o, &o->value, numeric));
595}
596
597char *
598options_parse(const char *name, int *idx)
599{
600	char	*copy, *cp, *end;
601
602	if (*name == '\0')
603		return (NULL);
604	copy = xstrdup(name);
605	if ((cp = strchr(copy, '[')) == NULL) {
606		*idx = -1;
607		return (copy);
608	}
609	end = strchr(cp + 1, ']');
610	if (end == NULL || end[1] != '\0' || !isdigit((u_char)end[-1])) {
611		free(copy);
612		return (NULL);
613	}
614	if (sscanf(cp, "[%d]", idx) != 1 || *idx < 0) {
615		free(copy);
616		return (NULL);
617	}
618	*cp = '\0';
619	return (copy);
620}
621
622struct options_entry *
623options_parse_get(struct options *oo, const char *s, int *idx, int only)
624{
625	struct options_entry	*o;
626	char			*name;
627
628	name = options_parse(s, idx);
629	if (name == NULL)
630		return (NULL);
631	if (only)
632		o = options_get_only(oo, name);
633	else
634		o = options_get(oo, name);
635	free(name);
636	return (o);
637}
638
639char *
640options_match(const char *s, int *idx, int *ambiguous)
641{
642	const struct options_table_entry	*oe, *found;
643	char					*parsed;
644	const char				*name;
645	size_t					 namelen;
646
647	parsed = options_parse(s, idx);
648	if (parsed == NULL)
649		return (NULL);
650	if (*parsed == '@') {
651		*ambiguous = 0;
652		return (parsed);
653	}
654
655	name = options_map_name(parsed);
656	namelen = strlen(name);
657
658	found = NULL;
659	for (oe = options_table; oe->name != NULL; oe++) {
660		if (strcmp(oe->name, name) == 0) {
661			found = oe;
662			break;
663		}
664		if (strncmp(oe->name, name, namelen) == 0) {
665			if (found != NULL) {
666				*ambiguous = 1;
667				free(parsed);
668				return (NULL);
669			}
670			found = oe;
671		}
672	}
673	free(parsed);
674	if (found == NULL) {
675		*ambiguous = 0;
676		return (NULL);
677	}
678	return (xstrdup(found->name));
679}
680
681struct options_entry *
682options_match_get(struct options *oo, const char *s, int *idx, int only,
683    int *ambiguous)
684{
685	char			*name;
686	struct options_entry	*o;
687
688	name = options_match(s, idx, ambiguous);
689	if (name == NULL)
690		return (NULL);
691	*ambiguous = 0;
692	if (only)
693		o = options_get_only(oo, name);
694	else
695		o = options_get(oo, name);
696	free(name);
697	return (o);
698}
699
700const char *
701options_get_string(struct options *oo, const char *name)
702{
703	struct options_entry	*o;
704
705	o = options_get(oo, name);
706	if (o == NULL)
707		fatalx("missing option %s", name);
708	if (!OPTIONS_IS_STRING(o))
709		fatalx("option %s is not a string", name);
710	return (o->value.string);
711}
712
713long long
714options_get_number(struct options *oo, const char *name)
715{
716	struct options_entry	*o;
717
718	o = options_get(oo, name);
719	if (o == NULL)
720		fatalx("missing option %s", name);
721	if (!OPTIONS_IS_NUMBER(o))
722		fatalx("option %s is not a number", name);
723	return (o->value.number);
724}
725
726struct options_entry *
727options_set_string(struct options *oo, const char *name, int append,
728    const char *fmt, ...)
729{
730	struct options_entry	*o;
731	va_list			 ap;
732	const char		*separator = "";
733	char			*s, *value;
734
735	va_start(ap, fmt);
736	xvasprintf(&s, fmt, ap);
737	va_end(ap);
738
739	o = options_get_only(oo, name);
740	if (o != NULL && append && OPTIONS_IS_STRING(o)) {
741		if (*name != '@') {
742			separator = o->tableentry->separator;
743			if (separator == NULL)
744				separator = "";
745		}
746		xasprintf(&value, "%s%s%s", o->value.string, separator, s);
747		free(s);
748	} else
749		value = s;
750	if (o == NULL && *name == '@')
751		o = options_add(oo, name);
752	else if (o == NULL) {
753		o = options_default(oo, options_parent_table_entry(oo, name));
754		if (o == NULL)
755			return (NULL);
756	}
757
758	if (!OPTIONS_IS_STRING(o))
759		fatalx("option %s is not a string", name);
760	free(o->value.string);
761	o->value.string = value;
762	o->cached = 0;
763	return (o);
764}
765
766struct options_entry *
767options_set_number(struct options *oo, const char *name, long long value)
768{
769	struct options_entry	*o;
770
771	if (*name == '@')
772		fatalx("user option %s must be a string", name);
773
774	o = options_get_only(oo, name);
775	if (o == NULL) {
776		o = options_default(oo, options_parent_table_entry(oo, name));
777		if (o == NULL)
778			return (NULL);
779	}
780
781	if (!OPTIONS_IS_NUMBER(o))
782		fatalx("option %s is not a number", name);
783	o->value.number = value;
784	return (o);
785}
786
787int
788options_scope_from_name(struct args *args, int window,
789    const char *name, struct cmd_find_state *fs, struct options **oo,
790    char **cause)
791{
792	struct session				*s = fs->s;
793	struct winlink				*wl = fs->wl;
794	struct window_pane			*wp = fs->wp;
795	const char				*target = args_get(args, 't');
796	const struct options_table_entry	*oe;
797	int					 scope = OPTIONS_TABLE_NONE;
798
799	if (*name == '@')
800		return (options_scope_from_flags(args, window, fs, oo, cause));
801
802	for (oe = options_table; oe->name != NULL; oe++) {
803		if (strcmp(oe->name, name) == 0)
804			break;
805	}
806	if (oe->name == NULL) {
807		xasprintf(cause, "unknown option: %s", name);
808		return (OPTIONS_TABLE_NONE);
809	}
810	switch (oe->scope) {
811	case OPTIONS_TABLE_SERVER:
812		*oo = global_options;
813		scope = OPTIONS_TABLE_SERVER;
814		break;
815	case OPTIONS_TABLE_SESSION:
816		if (args_has(args, 'g')) {
817			*oo = global_s_options;
818			scope = OPTIONS_TABLE_SESSION;
819		} else if (s == NULL && target != NULL)
820			xasprintf(cause, "no such session: %s", target);
821		else if (s == NULL)
822			xasprintf(cause, "no current session");
823		else {
824			*oo = s->options;
825			scope = OPTIONS_TABLE_SESSION;
826		}
827		break;
828	case OPTIONS_TABLE_WINDOW|OPTIONS_TABLE_PANE:
829		if (args_has(args, 'p')) {
830			if (wp == NULL && target != NULL)
831				xasprintf(cause, "no such pane: %s", target);
832			else if (wp == NULL)
833				xasprintf(cause, "no current pane");
834			else {
835				*oo = wp->options;
836				scope = OPTIONS_TABLE_PANE;
837			}
838			break;
839		}
840		/* FALLTHROUGH */
841	case OPTIONS_TABLE_WINDOW:
842		if (args_has(args, 'g')) {
843			*oo = global_w_options;
844			scope = OPTIONS_TABLE_WINDOW;
845		} else if (wl == NULL && target != NULL)
846			xasprintf(cause, "no such window: %s", target);
847		else if (wl == NULL)
848			xasprintf(cause, "no current window");
849		else {
850			*oo = wl->window->options;
851			scope = OPTIONS_TABLE_WINDOW;
852		}
853		break;
854	}
855	return (scope);
856}
857
858int
859options_scope_from_flags(struct args *args, int window,
860    struct cmd_find_state *fs, struct options **oo, char **cause)
861{
862	struct session		*s = fs->s;
863	struct winlink		*wl = fs->wl;
864	struct window_pane	*wp = fs->wp;
865	const char		*target = args_get(args, 't');
866
867	if (args_has(args, 's')) {
868		*oo = global_options;
869		return (OPTIONS_TABLE_SERVER);
870	}
871
872	if (args_has(args, 'p')) {
873		if (wp == NULL) {
874			if (target != NULL)
875				xasprintf(cause, "no such pane: %s", target);
876			else
877				xasprintf(cause, "no current pane");
878			return (OPTIONS_TABLE_NONE);
879		}
880		*oo = wp->options;
881		return (OPTIONS_TABLE_PANE);
882	} else if (window || args_has(args, 'w')) {
883		if (args_has(args, 'g')) {
884			*oo = global_w_options;
885			return (OPTIONS_TABLE_WINDOW);
886		}
887		if (wl == NULL) {
888			if (target != NULL)
889				xasprintf(cause, "no such window: %s", target);
890			else
891				xasprintf(cause, "no current window");
892			return (OPTIONS_TABLE_NONE);
893		}
894		*oo = wl->window->options;
895		return (OPTIONS_TABLE_WINDOW);
896	} else {
897		if (args_has(args, 'g')) {
898			*oo = global_s_options;
899			return (OPTIONS_TABLE_SESSION);
900		}
901		if (s == NULL) {
902			if (target != NULL)
903				xasprintf(cause, "no such session: %s", target);
904			else
905				xasprintf(cause, "no current session");
906			return (OPTIONS_TABLE_NONE);
907		}
908		*oo = s->options;
909		return (OPTIONS_TABLE_SESSION);
910	}
911}
912
913struct style *
914options_string_to_style(struct options *oo, const char *name,
915    struct format_tree *ft)
916{
917	struct options_entry	*o;
918	const char		*s;
919	char			*expanded;
920
921	o = options_get(oo, name);
922	if (o == NULL || !OPTIONS_IS_STRING(o))
923		return (NULL);
924
925	if (o->cached)
926		return (&o->style);
927	s = o->value.string;
928	log_debug("%s: %s is '%s'", __func__, name, s);
929
930	style_set(&o->style, &grid_default_cell);
931	o->cached = (strstr(s, "#{") == NULL);
932
933	if (ft != NULL && !o->cached) {
934		expanded = format_expand(ft, s);
935		if (style_parse(&o->style, &grid_default_cell, expanded) != 0) {
936			free(expanded);
937			return (NULL);
938		}
939		free(expanded);
940	} else {
941		if (style_parse(&o->style, &grid_default_cell, s) != 0)
942			return (NULL);
943	}
944	return (&o->style);
945}
946
947static int
948options_from_string_check(const struct options_table_entry *oe,
949    const char *value, char **cause)
950{
951	struct style	sy;
952
953	if (oe == NULL)
954		return (0);
955	if (strcmp(oe->name, "default-shell") == 0 && !checkshell(value)) {
956		xasprintf(cause, "not a suitable shell: %s", value);
957		return (-1);
958	}
959	if (oe->pattern != NULL && fnmatch(oe->pattern, value, 0) != 0) {
960		xasprintf(cause, "value is invalid: %s", value);
961		return (-1);
962	}
963	if ((oe->flags & OPTIONS_TABLE_IS_STYLE) &&
964	    strstr(value, "#{") == NULL &&
965	    style_parse(&sy, &grid_default_cell, value) != 0) {
966		xasprintf(cause, "invalid style: %s", value);
967		return (-1);
968	}
969	return (0);
970}
971
972static int
973options_from_string_flag(struct options *oo, const char *name,
974    const char *value, char **cause)
975{
976	int	flag;
977
978	if (value == NULL || *value == '\0')
979		flag = !options_get_number(oo, name);
980	else if (strcmp(value, "1") == 0 ||
981	    strcasecmp(value, "on") == 0 ||
982	    strcasecmp(value, "yes") == 0)
983		flag = 1;
984	else if (strcmp(value, "0") == 0 ||
985	    strcasecmp(value, "off") == 0 ||
986	    strcasecmp(value, "no") == 0)
987		flag = 0;
988	else {
989		xasprintf(cause, "bad value: %s", value);
990		return (-1);
991	}
992	options_set_number(oo, name, flag);
993	return (0);
994}
995
996static int
997options_from_string_choice(const struct options_table_entry *oe,
998    struct options *oo, const char *name, const char *value, char **cause)
999{
1000	const char	**cp;
1001	int		  n, choice = -1;
1002
1003	if (value == NULL) {
1004		choice = options_get_number(oo, name);
1005		if (choice < 2)
1006			choice = !choice;
1007	} else {
1008		n = 0;
1009		for (cp = oe->choices; *cp != NULL; cp++) {
1010			if (strcmp(*cp, value) == 0)
1011				choice = n;
1012			n++;
1013		}
1014		if (choice == -1) {
1015			xasprintf(cause, "unknown value: %s", value);
1016			return (-1);
1017		}
1018	}
1019	options_set_number(oo, name, choice);
1020	return (0);
1021}
1022
1023int
1024options_from_string(struct options *oo, const struct options_table_entry *oe,
1025    const char *name, const char *value, int append, char **cause)
1026{
1027	enum options_table_type	 type;
1028	long long		 number;
1029	const char		*errstr, *new;
1030	char			*old;
1031	key_code		 key;
1032
1033	if (oe != NULL) {
1034		if (value == NULL &&
1035		    oe->type != OPTIONS_TABLE_FLAG &&
1036		    oe->type != OPTIONS_TABLE_CHOICE) {
1037			xasprintf(cause, "empty value");
1038			return (-1);
1039		}
1040		type = oe->type;
1041	} else {
1042		if (*name != '@') {
1043			xasprintf(cause, "bad option name");
1044			return (-1);
1045		}
1046		type = OPTIONS_TABLE_STRING;
1047	}
1048
1049	switch (type) {
1050	case OPTIONS_TABLE_STRING:
1051		old = xstrdup(options_get_string(oo, name));
1052		options_set_string(oo, name, append, "%s", value);
1053
1054		new = options_get_string(oo, name);
1055		if (options_from_string_check(oe, new, cause) != 0) {
1056			options_set_string(oo, name, 0, "%s", old);
1057			free(old);
1058			return (-1);
1059		}
1060		free(old);
1061		return (0);
1062	case OPTIONS_TABLE_NUMBER:
1063		number = strtonum(value, oe->minimum, oe->maximum, &errstr);
1064		if (errstr != NULL) {
1065			xasprintf(cause, "value is %s: %s", errstr, value);
1066			return (-1);
1067		}
1068		options_set_number(oo, name, number);
1069		return (0);
1070	case OPTIONS_TABLE_KEY:
1071		key = key_string_lookup_string(value);
1072		if (key == KEYC_UNKNOWN) {
1073			xasprintf(cause, "bad key: %s", value);
1074			return (-1);
1075		}
1076		options_set_number(oo, name, key);
1077		return (0);
1078	case OPTIONS_TABLE_COLOUR:
1079		if ((number = colour_fromstring(value)) == -1) {
1080			xasprintf(cause, "bad colour: %s", value);
1081			return (-1);
1082		}
1083		options_set_number(oo, name, number);
1084		return (0);
1085	case OPTIONS_TABLE_FLAG:
1086		return (options_from_string_flag(oo, name, value, cause));
1087	case OPTIONS_TABLE_CHOICE:
1088		return (options_from_string_choice(oe, oo, name, value, cause));
1089	case OPTIONS_TABLE_COMMAND:
1090		break;
1091	}
1092	return (-1);
1093}
1094
1095void
1096options_push_changes(const char *name)
1097{
1098	struct client		*loop;
1099	struct session		*s;
1100	struct window		*w;
1101	struct window_pane	*wp;
1102
1103	if (strcmp(name, "automatic-rename") == 0) {
1104		RB_FOREACH(w, windows, &windows) {
1105			if (w->active == NULL)
1106				continue;
1107			if (options_get_number(w->options, "automatic-rename"))
1108				w->active->flags |= PANE_CHANGED;
1109		}
1110	}
1111	if (strcmp(name, "key-table") == 0) {
1112		TAILQ_FOREACH(loop, &clients, entry)
1113			server_client_set_key_table(loop, NULL);
1114	}
1115	if (strcmp(name, "user-keys") == 0) {
1116		TAILQ_FOREACH(loop, &clients, entry) {
1117			if (loop->tty.flags & TTY_OPENED)
1118				tty_keys_build(&loop->tty);
1119		}
1120	}
1121	if (strcmp(name, "status") == 0 ||
1122	    strcmp(name, "status-interval") == 0)
1123		status_timer_start_all();
1124	if (strcmp(name, "monitor-silence") == 0)
1125		alerts_reset_all();
1126	if (strcmp(name, "window-style") == 0 ||
1127	    strcmp(name, "window-active-style") == 0) {
1128		RB_FOREACH(wp, window_pane_tree, &all_window_panes)
1129			wp->flags |= PANE_STYLECHANGED;
1130	}
1131	if (strcmp(name, "pane-colours") == 0) {
1132		RB_FOREACH(wp, window_pane_tree, &all_window_panes)
1133			colour_palette_from_option(&wp->palette, wp->options);
1134	}
1135	if (strcmp(name, "pane-border-status") == 0) {
1136		RB_FOREACH(w, windows, &windows)
1137			layout_fix_panes(w, NULL);
1138	}
1139	RB_FOREACH(s, sessions, &sessions)
1140		status_update_cache(s);
1141
1142	recalculate_sizes();
1143	TAILQ_FOREACH(loop, &clients, entry) {
1144		if (loop->session != NULL)
1145			server_redraw_client(loop);
1146	}
1147}
1148
1149int
1150options_remove_or_default(struct options_entry *o, int idx, char **cause)
1151{
1152	struct options	*oo = o->owner;
1153
1154	if (idx == -1) {
1155		if (o->tableentry != NULL &&
1156		    (oo == global_options ||
1157		    oo == global_s_options ||
1158		    oo == global_w_options))
1159			options_default(oo, o->tableentry);
1160		else
1161			options_remove(o);
1162	} else if (options_array_set(o, idx, NULL, 0, cause) != 0)
1163		return (-1);
1164	return (0);
1165}
1166