1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
4  *
5  * Introduced single menu mode (show all sub-menus in one large tree).
6  * 2002-11-06 Petr Baudis <pasky@ucw.cz>
7  *
8  * i18n, 2005, Arnaldo Carvalho de Melo <acme@conectiva.com.br>
9  */
10 
11 #include <ctype.h>
12 #include <errno.h>
13 #include <fcntl.h>
14 #include <limits.h>
15 #include <stdarg.h>
16 #include <stdlib.h>
17 #include <string.h>
18 #include <strings.h>
19 #include <signal.h>
20 #include <unistd.h>
21 
22 #include <list.h>
23 #include <xalloc.h>
24 #include "lkc.h"
25 #include "lxdialog/dialog.h"
26 #include "mnconf-common.h"
27 
28 static const char mconf_readme[] =
29 "Overview\n"
30 "--------\n"
31 "This interface lets you select features and parameters for the build.\n"
32 "Features can either be built-in, modularized, or ignored. Parameters\n"
33 "must be entered in as decimal or hexadecimal numbers or text.\n"
34 "\n"
35 "Menu items beginning with following braces represent features that\n"
36 "  [ ] can be built in or removed\n"
37 "  < > can be built in, modularized or removed\n"
38 "  { } can be built in or modularized (selected by other feature)\n"
39 "  - - are selected by other feature,\n"
40 "while *, M or whitespace inside braces means to build in, build as\n"
41 "a module or to exclude the feature respectively.\n"
42 "\n"
43 "To change any of these features, highlight it with the cursor\n"
44 "keys and press <Y> to build it in, <M> to make it a module or\n"
45 "<N> to remove it.  You may also press the <Space Bar> to cycle\n"
46 "through the available options (i.e. Y->N->M->Y).\n"
47 "\n"
48 "Some additional keyboard hints:\n"
49 "\n"
50 "Menus\n"
51 "----------\n"
52 "o  Use the Up/Down arrow keys (cursor keys) to highlight the item you\n"
53 "   wish to change or the submenu you wish to select and press <Enter>.\n"
54 "   Submenus are designated by \"--->\", empty ones by \"----\".\n"
55 "\n"
56 "   Shortcut: Press the option's highlighted letter (hotkey).\n"
57 "             Pressing a hotkey more than once will sequence\n"
58 "             through all visible items which use that hotkey.\n"
59 "\n"
60 "   You may also use the <PAGE UP> and <PAGE DOWN> keys to scroll\n"
61 "   unseen options into view.\n"
62 "\n"
63 "o  To exit a menu use the cursor keys to highlight the <Exit> button\n"
64 "   and press <ENTER>.\n"
65 "\n"
66 "   Shortcut: Press <ESC><ESC> or <E> or <X> if there is no hotkey\n"
67 "             using those letters.  You may press a single <ESC>, but\n"
68 "             there is a delayed response which you may find annoying.\n"
69 "\n"
70 "   Also, the <TAB> and cursor keys will cycle between <Select>,\n"
71 "   <Exit>, <Help>, <Save>, and <Load>.\n"
72 "\n"
73 "o  To get help with an item, use the cursor keys to highlight <Help>\n"
74 "   and press <ENTER>.\n"
75 "\n"
76 "   Shortcut: Press <H> or <?>.\n"
77 "\n"
78 "o  To toggle the display of hidden options, press <Z>.\n"
79 "\n"
80 "\n"
81 "Radiolists  (Choice lists)\n"
82 "-----------\n"
83 "o  Use the cursor keys to select the option you wish to set and press\n"
84 "   <S> or the <SPACE BAR>.\n"
85 "\n"
86 "   Shortcut: Press the first letter of the option you wish to set then\n"
87 "             press <S> or <SPACE BAR>.\n"
88 "\n"
89 "o  To see available help for the item, use the cursor keys to highlight\n"
90 "   <Help> and Press <ENTER>.\n"
91 "\n"
92 "   Shortcut: Press <H> or <?>.\n"
93 "\n"
94 "   Also, the <TAB> and cursor keys will cycle between <Select> and\n"
95 "   <Help>\n"
96 "\n"
97 "\n"
98 "Data Entry\n"
99 "-----------\n"
100 "o  Enter the requested information and press <ENTER>\n"
101 "   If you are entering hexadecimal values, it is not necessary to\n"
102 "   add the '0x' prefix to the entry.\n"
103 "\n"
104 "o  For help, use the <TAB> or cursor keys to highlight the help option\n"
105 "   and press <ENTER>.  You can try <TAB><H> as well.\n"
106 "\n"
107 "\n"
108 "Text Box    (Help Window)\n"
109 "--------\n"
110 "o  Use the cursor keys to scroll up/down/left/right.  The VI editor\n"
111 "   keys h,j,k,l function here as do <u>, <d>, <SPACE BAR> and <B> for\n"
112 "   those who are familiar with less and lynx.\n"
113 "\n"
114 "o  Press <E>, <X>, <q>, <Enter> or <Esc><Esc> to exit.\n"
115 "\n"
116 "\n"
117 "Alternate Configuration Files\n"
118 "-----------------------------\n"
119 "Menuconfig supports the use of alternate configuration files for\n"
120 "those who, for various reasons, find it necessary to switch\n"
121 "between different configurations.\n"
122 "\n"
123 "The <Save> button will let you save the current configuration to\n"
124 "a file of your choosing.  Use the <Load> button to load a previously\n"
125 "saved alternate configuration.\n"
126 "\n"
127 "Even if you don't use alternate configuration files, but you find\n"
128 "during a Menuconfig session that you have completely messed up your\n"
129 "settings, you may use the <Load> button to restore your previously\n"
130 "saved settings from \".config\" without restarting Menuconfig.\n"
131 "\n"
132 "Other information\n"
133 "-----------------\n"
134 "If you use Menuconfig in an XTERM window, make sure you have your\n"
135 "$TERM variable set to point to an xterm definition which supports\n"
136 "color.  Otherwise, Menuconfig will look rather bad.  Menuconfig will\n"
137 "not display correctly in an RXVT window because rxvt displays only one\n"
138 "intensity of color, bright.\n"
139 "\n"
140 "Menuconfig will display larger menus on screens or xterms which are\n"
141 "set to display more than the standard 25 row by 80 column geometry.\n"
142 "In order for this to work, the \"stty size\" command must be able to\n"
143 "display the screen's current row and column geometry.  I STRONGLY\n"
144 "RECOMMEND that you make sure you do NOT have the shell variables\n"
145 "LINES and COLUMNS exported into your environment.  Some distributions\n"
146 "export those variables via /etc/profile.  Some ncurses programs can\n"
147 "become confused when those variables (LINES & COLUMNS) don't reflect\n"
148 "the true screen size.\n"
149 "\n"
150 "Optional personality available\n"
151 "------------------------------\n"
152 "If you prefer to have all of the options listed in a single menu,\n"
153 "rather than the default multimenu hierarchy, run the menuconfig with\n"
154 "MENUCONFIG_MODE environment variable set to single_menu. Example:\n"
155 "\n"
156 "make MENUCONFIG_MODE=single_menu menuconfig\n"
157 "\n"
158 "<Enter> will then unroll the appropriate category, or enfold it if it\n"
159 "is already unrolled.\n"
160 "\n"
161 "Note that this mode can eventually be a little more CPU expensive\n"
162 "(especially with a larger number of unrolled categories) than the\n"
163 "default mode.\n"
164 "\n"
165 
166 "Search\n"
167 "-------\n"
168 "Pressing the forward-slash (/) anywhere brings up a search dialog box.\n"
169 "\n"
170 
171 "Different color themes available\n"
172 "--------------------------------\n"
173 "It is possible to select different color themes using the variable\n"
174 "MENUCONFIG_COLOR. To select a theme use:\n"
175 "\n"
176 "make MENUCONFIG_COLOR=<theme> menuconfig\n"
177 "\n"
178 "Available themes are\n"
179 " mono       => selects colors suitable for monochrome displays\n"
180 " blackbg    => selects a color scheme with black background\n"
181 " classic    => theme with blue background. The classic look\n"
182 " bluetitle  => an LCD friendly version of classic. (default)\n"
183 "\n",
184 menu_instructions[] =
185 	"Arrow keys navigate the menu.  "
186 	"<Enter> selects submenus ---> (or empty submenus ----).  "
187 	"Highlighted letters are hotkeys.  "
188 	"Pressing <Y> includes, <N> excludes, <M> modularizes features.  "
189 	"Press <Esc><Esc> to exit, <?> for Help, </> for Search.  "
190 	"Legend: [*] built-in  [ ] excluded  <M> module  < > module capable",
191 radiolist_instructions[] =
192 	"Use the arrow keys to navigate this window or "
193 	"press the hotkey of the item you wish to select "
194 	"followed by the <SPACE BAR>. "
195 	"Press <?> for additional information about this option.",
196 inputbox_instructions_int[] =
197 	"Please enter a decimal value. "
198 	"Fractions will not be accepted.  "
199 	"Use the <TAB> key to move from the input field to the buttons below it.",
200 inputbox_instructions_hex[] =
201 	"Please enter a hexadecimal value. "
202 	"Use the <TAB> key to move from the input field to the buttons below it.",
203 inputbox_instructions_string[] =
204 	"Please enter a string value. "
205 	"Use the <TAB> key to move from the input field to the buttons below it.",
206 setmod_text[] =
207 	"This feature depends on another which has been configured as a module.\n"
208 	"As a result, this feature will be built as a module.",
209 load_config_text[] =
210 	"Enter the name of the configuration file you wish to load.  "
211 	"Accept the name shown to restore the configuration you "
212 	"last retrieved.  Leave blank to abort.",
213 load_config_help[] =
214 	"\n"
215 	"For various reasons, one may wish to keep several different\n"
216 	"configurations available on a single machine.\n"
217 	"\n"
218 	"If you have saved a previous configuration in a file other than the\n"
219 	"default one, entering its name here will allow you to modify that\n"
220 	"configuration.\n"
221 	"\n"
222 	"If you are uncertain, then you have probably never used alternate\n"
223 	"configuration files. You should therefore leave this blank to abort.\n",
224 save_config_text[] =
225 	"Enter a filename to which this configuration should be saved "
226 	"as an alternate.  Leave blank to abort.",
227 save_config_help[] =
228 	"\n"
229 	"For various reasons, one may wish to keep different configurations\n"
230 	"available on a single machine.\n"
231 	"\n"
232 	"Entering a file name here will allow you to later retrieve, modify\n"
233 	"and use the current configuration as an alternate to whatever\n"
234 	"configuration options you have selected at that time.\n"
235 	"\n"
236 	"If you are uncertain what all this means then you should probably\n"
237 	"leave this blank.\n",
238 search_help[] =
239 	"\n"
240 	"Search for symbols and display their relations.\n"
241 	"Regular expressions are allowed.\n"
242 	"Example: search for \"^FOO\"\n"
243 	"Result:\n"
244 	"-----------------------------------------------------------------\n"
245 	"Symbol: FOO [=m]\n"
246 	"Type  : tristate\n"
247 	"Prompt: Foo bus is used to drive the bar HW\n"
248 	"  Location:\n"
249 	"    -> Bus options (PCI, PCMCIA, EISA, ISA)\n"
250 	"      -> PCI support (PCI [=y])\n"
251 	"(1)     -> PCI access mode (<choice> [=y])\n"
252 	"  Defined at drivers/pci/Kconfig:47\n"
253 	"  Depends on: X86_LOCAL_APIC && X86_IO_APIC\n"
254 	"  Selects: LIBCRC32\n"
255 	"  Selected by: BAR [=n]\n"
256 	"-----------------------------------------------------------------\n"
257 	"o The line 'Type:' shows the type of the configuration option for\n"
258 	"  this symbol (bool, tristate, string, ...)\n"
259 	"o The line 'Prompt:' shows the text used in the menu structure for\n"
260 	"  this symbol\n"
261 	"o The 'Defined at' line tells at what file / line number the symbol\n"
262 	"  is defined\n"
263 	"o The 'Depends on:' line tells what symbols need to be defined for\n"
264 	"  this symbol to be visible in the menu (selectable)\n"
265 	"o The 'Location:' lines tells where in the menu structure this symbol\n"
266 	"  is located\n"
267 	"    A location followed by a [=y] indicates that this is a\n"
268 	"    selectable menu item - and the current value is displayed inside\n"
269 	"    brackets.\n"
270 	"    Press the key in the (#) prefix to jump directly to that\n"
271 	"    location. You will be returned to the current search results\n"
272 	"    after exiting this new menu.\n"
273 	"o The 'Selects:' line tells what symbols will be automatically\n"
274 	"  selected if this symbol is selected (y or m)\n"
275 	"o The 'Selected by' line tells what symbol has selected this symbol\n"
276 	"\n"
277 	"Only relevant lines are shown.\n"
278 	"\n\n"
279 	"Search examples:\n"
280 	"Examples: USB	=> find all symbols containing USB\n"
281 	"          ^USB => find all symbols starting with USB\n"
282 	"          USB$ => find all symbols ending with USB\n"
283 	"\n";
284 
285 static int indent;
286 static struct menu *current_menu;
287 static int child_count;
288 static int single_menu_mode;
289 static int show_all_options;
290 static int save_and_exit;
291 static int silent;
292 
293 static void conf(struct menu *menu, struct menu *active_menu);
294 
295 static char filename[PATH_MAX+1];
set_config_filename(const char * config_filename)296 static void set_config_filename(const char *config_filename)
297 {
298 	static char menu_backtitle[PATH_MAX+128];
299 
300 	snprintf(menu_backtitle, sizeof(menu_backtitle), "%s - %s",
301 		 config_filename, rootmenu.prompt->text);
302 	set_dialog_backtitle(menu_backtitle);
303 
304 	snprintf(filename, sizeof(filename), "%s", config_filename);
305 }
306 
307 struct subtitle_part {
308 	struct list_head entries;
309 	const char *text;
310 };
311 static LIST_HEAD(trail);
312 
313 static struct subtitle_list *subtitles;
set_subtitle(void)314 static void set_subtitle(void)
315 {
316 	struct subtitle_part *sp;
317 	struct subtitle_list *pos, *tmp;
318 
319 	for (pos = subtitles; pos != NULL; pos = tmp) {
320 		tmp = pos->next;
321 		free(pos);
322 	}
323 
324 	subtitles = NULL;
325 	list_for_each_entry(sp, &trail, entries) {
326 		if (sp->text) {
327 			if (pos) {
328 				pos->next = xcalloc(1, sizeof(*pos));
329 				pos = pos->next;
330 			} else {
331 				subtitles = pos = xcalloc(1, sizeof(*pos));
332 			}
333 			pos->text = sp->text;
334 		}
335 	}
336 
337 	set_dialog_subtitles(subtitles);
338 }
339 
reset_subtitle(void)340 static void reset_subtitle(void)
341 {
342 	struct subtitle_list *pos, *tmp;
343 
344 	for (pos = subtitles; pos != NULL; pos = tmp) {
345 		tmp = pos->next;
346 		free(pos);
347 	}
348 	subtitles = NULL;
349 	set_dialog_subtitles(subtitles);
350 }
351 
show_textbox_ext(const char * title,const char * text,int r,int c,int * vscroll,int * hscroll,int (* extra_key_cb)(int,size_t,size_t,void *),void * data)352 static int show_textbox_ext(const char *title, const char *text, int r, int c,
353 			    int *vscroll, int *hscroll,
354 			    int (*extra_key_cb)(int, size_t, size_t, void *),
355 			    void *data)
356 {
357 	dialog_clear();
358 	return dialog_textbox(title, text, r, c, vscroll, hscroll,
359 			      extra_key_cb, data);
360 }
361 
show_textbox(const char * title,const char * text,int r,int c)362 static void show_textbox(const char *title, const char *text, int r, int c)
363 {
364 	show_textbox_ext(title, text, r, c, NULL, NULL, NULL, NULL);
365 }
366 
show_helptext(const char * title,const char * text)367 static void show_helptext(const char *title, const char *text)
368 {
369 	show_textbox(title, text, 0, 0);
370 }
371 
show_help(struct menu * menu)372 static void show_help(struct menu *menu)
373 {
374 	struct gstr help = str_new();
375 
376 	help.max_width = getmaxx(stdscr) - 10;
377 	menu_get_ext_help(menu, &help);
378 
379 	show_helptext(menu_get_prompt(menu), str_get(&help));
380 	str_free(&help);
381 }
382 
search_conf(void)383 static void search_conf(void)
384 {
385 	struct symbol **sym_arr;
386 	struct gstr res;
387 	struct gstr title;
388 	char *dialog_input;
389 	int dres, vscroll = 0, hscroll = 0;
390 	bool again;
391 	struct gstr sttext;
392 	struct subtitle_part stpart;
393 
394 	title = str_new();
395 	str_printf( &title, "Enter (sub)string or regexp to search for "
396 			      "(with or without \"%s\")", CONFIG_);
397 
398 again:
399 	dialog_clear();
400 	dres = dialog_inputbox("Search Configuration Parameter",
401 			      str_get(&title),
402 			      10, 75, "");
403 	switch (dres) {
404 	case 0:
405 		break;
406 	case 1:
407 		show_helptext("Search Configuration", search_help);
408 		goto again;
409 	default:
410 		str_free(&title);
411 		return;
412 	}
413 
414 	/* strip the prefix if necessary */
415 	dialog_input = dialog_input_result;
416 	if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
417 		dialog_input += strlen(CONFIG_);
418 
419 	sttext = str_new();
420 	str_printf(&sttext, "Search (%s)", dialog_input_result);
421 	stpart.text = str_get(&sttext);
422 	list_add_tail(&stpart.entries, &trail);
423 
424 	sym_arr = sym_re_search(dialog_input);
425 	do {
426 		LIST_HEAD(head);
427 		struct search_data data = {
428 			.head = &head,
429 		};
430 		struct jump_key *pos, *tmp;
431 
432 		jump_key_char = 0;
433 		res = get_relations_str(sym_arr, &head);
434 		set_subtitle();
435 		dres = show_textbox_ext("Search Results", str_get(&res), 0, 0,
436 					&vscroll, &hscroll,
437 					handle_search_keys, &data);
438 		again = false;
439 		if (dres >= '1' && dres <= '9') {
440 			assert(data.target != NULL);
441 			conf(data.target->parent, data.target);
442 			again = true;
443 		}
444 		str_free(&res);
445 		list_for_each_entry_safe(pos, tmp, &head, entries)
446 			free(pos);
447 	} while (again);
448 	free(sym_arr);
449 	str_free(&title);
450 	list_del(trail.prev);
451 	str_free(&sttext);
452 }
453 
build_conf(struct menu * menu)454 static void build_conf(struct menu *menu)
455 {
456 	struct symbol *sym;
457 	struct property *prop;
458 	struct menu *child;
459 	int type, tmp, doint = 2;
460 	tristate val;
461 	char ch;
462 	bool visible;
463 
464 	/*
465 	 * note: menu_is_visible() has side effect that it will
466 	 * recalc the value of the symbol.
467 	 */
468 	visible = menu_is_visible(menu);
469 	if (show_all_options && !menu_has_prompt(menu))
470 		return;
471 	else if (!show_all_options && !visible)
472 		return;
473 
474 	sym = menu->sym;
475 	prop = menu->prompt;
476 	if (!sym) {
477 		if (prop && menu != current_menu) {
478 			const char *prompt = menu_get_prompt(menu);
479 			switch (prop->type) {
480 			case P_MENU:
481 				child_count++;
482 				if (single_menu_mode) {
483 					item_make("%s%*c%s",
484 						  menu->data ? "-->" : "++>",
485 						  indent + 1, ' ', prompt);
486 				} else
487 					item_make("   %*c%s  %s",
488 						  indent + 1, ' ', prompt,
489 						  menu_is_empty(menu) ? "----" : "--->");
490 				item_set_tag('m');
491 				item_set_data(menu);
492 				if (single_menu_mode && menu->data)
493 					goto conf_childs;
494 				return;
495 			case P_COMMENT:
496 				if (prompt) {
497 					child_count++;
498 					item_make("   %*c*** %s ***", indent + 1, ' ', prompt);
499 					item_set_tag(':');
500 					item_set_data(menu);
501 				}
502 				break;
503 			default:
504 				if (prompt) {
505 					child_count++;
506 					item_make("---%*c%s", indent + 1, ' ', prompt);
507 					item_set_tag(':');
508 					item_set_data(menu);
509 				}
510 			}
511 		} else
512 			doint = 0;
513 		goto conf_childs;
514 	}
515 
516 	type = sym_get_type(sym);
517 	if (sym_is_choice(sym)) {
518 		struct symbol *def_sym = sym_calc_choice(menu);
519 		struct menu *def_menu = NULL;
520 
521 		child_count++;
522 		for (child = menu->list; child; child = child->next) {
523 			if (menu_is_visible(child) && child->sym == def_sym)
524 				def_menu = child;
525 		}
526 
527 		item_make("   ");
528 		item_set_tag(def_menu ? 't' : ':');
529 		item_set_data(menu);
530 
531 		item_add_str("%*c%s", indent + 1, ' ', menu_get_prompt(menu));
532 		if (def_menu)
533 			item_add_str(" (%s)  --->", menu_get_prompt(def_menu));
534 		return;
535 	} else {
536 		if (menu == current_menu) {
537 			item_make("---%*c%s", indent + 1, ' ', menu_get_prompt(menu));
538 			item_set_tag(':');
539 			item_set_data(menu);
540 			goto conf_childs;
541 		}
542 		child_count++;
543 		val = sym_get_tristate_value(sym);
544 		switch (type) {
545 		case S_BOOLEAN:
546 			if (sym_is_changeable(sym))
547 				item_make("[%c]", val == no ? ' ' : '*');
548 			else
549 				item_make("-%c-", val == no ? ' ' : '*');
550 			item_set_tag('t');
551 			item_set_data(menu);
552 			break;
553 		case S_TRISTATE:
554 			switch (val) {
555 			case yes: ch = '*'; break;
556 			case mod: ch = 'M'; break;
557 			default:  ch = ' '; break;
558 			}
559 			if (sym_is_changeable(sym)) {
560 				if (sym->rev_dep.tri == mod)
561 					item_make("{%c}", ch);
562 				else
563 					item_make("<%c>", ch);
564 			} else
565 				item_make("-%c-", ch);
566 			item_set_tag('t');
567 			item_set_data(menu);
568 			break;
569 		default:
570 			tmp = 2 + strlen(sym_get_string_value(sym)); /* () = 2 */
571 			item_make("(%s)", sym_get_string_value(sym));
572 			tmp = indent - tmp + 4;
573 			if (tmp < 0)
574 				tmp = 0;
575 			item_add_str("%*c%s%s", tmp, ' ', menu_get_prompt(menu),
576 				     (sym_has_value(sym) || !sym_is_changeable(sym)) ?
577 				     "" : " (NEW)");
578 			item_set_tag('s');
579 			item_set_data(menu);
580 			goto conf_childs;
581 		}
582 		item_add_str("%*c%s%s", indent + 1, ' ', menu_get_prompt(menu),
583 			  (sym_has_value(sym) || !sym_is_changeable(sym)) ?
584 			  "" : " (NEW)");
585 		if (menu->prompt->type == P_MENU) {
586 			item_add_str("  %s", menu_is_empty(menu) ? "----" : "--->");
587 			return;
588 		}
589 	}
590 
591 conf_childs:
592 	indent += doint;
593 	for (child = menu->list; child; child = child->next)
594 		build_conf(child);
595 	indent -= doint;
596 }
597 
conf_choice(struct menu * menu)598 static void conf_choice(struct menu *menu)
599 {
600 	const char *prompt = menu_get_prompt(menu);
601 	struct menu *child;
602 	struct symbol *active;
603 
604 	active = sym_calc_choice(menu);
605 	while (1) {
606 		int res;
607 		int selected;
608 		item_reset();
609 
610 		current_menu = menu;
611 		for (child = menu->list; child; child = child->next) {
612 			if (!menu_is_visible(child))
613 				continue;
614 			if (child->sym)
615 				item_make("%s", menu_get_prompt(child));
616 			else {
617 				item_make("*** %s ***", menu_get_prompt(child));
618 				item_set_tag(':');
619 			}
620 			item_set_data(child);
621 			if (child->sym == active)
622 				item_set_selected(1);
623 			if (child->sym == sym_calc_choice(menu))
624 				item_set_tag('X');
625 		}
626 		dialog_clear();
627 		res = dialog_checklist(prompt ? prompt : "Main Menu",
628 					radiolist_instructions,
629 					MENUBOX_HEIGHT_MIN,
630 					MENUBOX_WIDTH_MIN,
631 					CHECKLIST_HEIGHT_MIN);
632 		selected = item_activate_selected();
633 		switch (res) {
634 		case 0:
635 			if (selected) {
636 				child = item_data();
637 				if (!child->sym)
638 					break;
639 
640 				choice_set_value(menu, child->sym);
641 			}
642 			return;
643 		case 1:
644 			if (selected) {
645 				child = item_data();
646 				show_help(child);
647 				active = child->sym;
648 			} else
649 				show_help(menu);
650 			break;
651 		case KEY_ESC:
652 			return;
653 		case -ERRDISPLAYTOOSMALL:
654 			return;
655 		}
656 	}
657 }
658 
conf_string(struct menu * menu)659 static void conf_string(struct menu *menu)
660 {
661 	const char *prompt = menu_get_prompt(menu);
662 
663 	while (1) {
664 		int res;
665 		const char *heading;
666 
667 		switch (sym_get_type(menu->sym)) {
668 		case S_INT:
669 			heading = inputbox_instructions_int;
670 			break;
671 		case S_HEX:
672 			heading = inputbox_instructions_hex;
673 			break;
674 		case S_STRING:
675 			heading = inputbox_instructions_string;
676 			break;
677 		default:
678 			heading = "Internal mconf error!";
679 		}
680 		dialog_clear();
681 		res = dialog_inputbox(prompt ? prompt : "Main Menu",
682 				      heading, 10, 75,
683 				      sym_get_string_value(menu->sym));
684 		switch (res) {
685 		case 0:
686 			if (sym_set_string_value(menu->sym, dialog_input_result))
687 				return;
688 			show_textbox(NULL, "You have made an invalid entry.", 5, 43);
689 			break;
690 		case 1:
691 			show_help(menu);
692 			break;
693 		case KEY_ESC:
694 			return;
695 		}
696 	}
697 }
698 
conf_load(void)699 static void conf_load(void)
700 {
701 
702 	while (1) {
703 		int res;
704 		dialog_clear();
705 		res = dialog_inputbox(NULL, load_config_text,
706 				      11, 55, filename);
707 		switch(res) {
708 		case 0:
709 			if (!dialog_input_result[0])
710 				return;
711 			if (!conf_read(dialog_input_result)) {
712 				set_config_filename(dialog_input_result);
713 				conf_set_changed(true);
714 				return;
715 			}
716 			show_textbox(NULL, "File does not exist!", 5, 38);
717 			break;
718 		case 1:
719 			show_helptext("Load Alternate Configuration", load_config_help);
720 			break;
721 		case KEY_ESC:
722 			return;
723 		}
724 	}
725 }
726 
conf_save(void)727 static void conf_save(void)
728 {
729 	while (1) {
730 		int res;
731 		dialog_clear();
732 		res = dialog_inputbox(NULL, save_config_text,
733 				      11, 55, filename);
734 		switch(res) {
735 		case 0:
736 			if (!dialog_input_result[0])
737 				return;
738 			if (!conf_write(dialog_input_result)) {
739 				set_config_filename(dialog_input_result);
740 				return;
741 			}
742 			show_textbox(NULL, "Can't create file!", 5, 60);
743 			break;
744 		case 1:
745 			show_helptext("Save Alternate Configuration", save_config_help);
746 			break;
747 		case KEY_ESC:
748 			return;
749 		}
750 	}
751 }
752 
conf(struct menu * menu,struct menu * active_menu)753 static void conf(struct menu *menu, struct menu *active_menu)
754 {
755 	struct menu *submenu;
756 	const char *prompt = menu_get_prompt(menu);
757 	struct subtitle_part stpart;
758 	struct symbol *sym;
759 	int res;
760 	int s_scroll = 0;
761 
762 	if (menu != &rootmenu)
763 		stpart.text = menu_get_prompt(menu);
764 	else
765 		stpart.text = NULL;
766 	list_add_tail(&stpart.entries, &trail);
767 
768 	while (1) {
769 		item_reset();
770 		current_menu = menu;
771 		build_conf(menu);
772 		if (!child_count)
773 			break;
774 		set_subtitle();
775 		dialog_clear();
776 		res = dialog_menu(prompt ? prompt : "Main Menu",
777 				  menu_instructions,
778 				  active_menu, &s_scroll);
779 		if (res == 1 || res == KEY_ESC || res == -ERRDISPLAYTOOSMALL)
780 			break;
781 		if (item_count() != 0) {
782 			if (!item_activate_selected())
783 				continue;
784 			if (!item_tag())
785 				continue;
786 		}
787 		submenu = item_data();
788 		active_menu = item_data();
789 		if (submenu)
790 			sym = submenu->sym;
791 		else
792 			sym = NULL;
793 
794 		switch (res) {
795 		case 0:
796 			switch (item_tag()) {
797 			case 'm':
798 				if (single_menu_mode)
799 					submenu->data = (void *) (long) !submenu->data;
800 				else
801 					conf(submenu, NULL);
802 				break;
803 			case 't':
804 				if (sym_is_choice(sym))
805 					conf_choice(submenu);
806 				else if (submenu->prompt->type == P_MENU)
807 					conf(submenu, NULL);
808 				break;
809 			case 's':
810 				conf_string(submenu);
811 				break;
812 			}
813 			break;
814 		case 2:
815 			if (sym)
816 				show_help(submenu);
817 			else {
818 				reset_subtitle();
819 				show_helptext("README", mconf_readme);
820 			}
821 			break;
822 		case 3:
823 			reset_subtitle();
824 			conf_save();
825 			break;
826 		case 4:
827 			reset_subtitle();
828 			conf_load();
829 			break;
830 		case 5:
831 			if (item_is_tag('t')) {
832 				if (sym_set_tristate_value(sym, yes))
833 					break;
834 				if (sym_set_tristate_value(sym, mod))
835 					show_textbox(NULL, setmod_text, 6, 74);
836 			}
837 			break;
838 		case 6:
839 			if (item_is_tag('t'))
840 				sym_set_tristate_value(sym, no);
841 			break;
842 		case 7:
843 			if (item_is_tag('t'))
844 				sym_set_tristate_value(sym, mod);
845 			break;
846 		case 8:
847 			if (item_is_tag('t'))
848 				sym_toggle_tristate_value(sym);
849 			else if (item_is_tag('m'))
850 				conf(submenu, NULL);
851 			break;
852 		case 9:
853 			search_conf();
854 			break;
855 		case 10:
856 			show_all_options = !show_all_options;
857 			break;
858 		}
859 	}
860 
861 	list_del(trail.prev);
862 }
863 
conf_message_callback(const char * s)864 static void conf_message_callback(const char *s)
865 {
866 	if (save_and_exit) {
867 		if (!silent)
868 			printf("%s", s);
869 	} else {
870 		show_textbox(NULL, s, 6, 60);
871 	}
872 }
873 
handle_exit(void)874 static int handle_exit(void)
875 {
876 	int res;
877 
878 	save_and_exit = 1;
879 	reset_subtitle();
880 	dialog_clear();
881 	if (conf_get_changed())
882 		res = dialog_yesno(NULL,
883 				   "Do you wish to save your new configuration?\n"
884 				     "(Press <ESC><ESC> to continue kernel configuration.)",
885 				   6, 60);
886 	else
887 		res = -1;
888 
889 	end_dialog(saved_x, saved_y);
890 
891 	switch (res) {
892 	case 0:
893 		if (conf_write(filename)) {
894 			fprintf(stderr, "\n\n"
895 					  "Error while writing of the configuration.\n"
896 					  "Your configuration changes were NOT saved."
897 					  "\n\n");
898 			return 1;
899 		}
900 		conf_write_autoconf(0);
901 		/* fall through */
902 	case -1:
903 		if (!silent)
904 			printf("\n\n"
905 				 "*** End of the configuration.\n"
906 				 "*** Execute 'make' to start the build or try 'make help'."
907 				 "\n\n");
908 		res = 0;
909 		break;
910 	default:
911 		if (!silent)
912 			fprintf(stderr, "\n\n"
913 					  "Your configuration changes were NOT saved."
914 					  "\n\n");
915 		if (res != KEY_ESC)
916 			res = 0;
917 	}
918 
919 	return res;
920 }
921 
sig_handler(int signo)922 static void sig_handler(int signo)
923 {
924 	exit(handle_exit());
925 }
926 
main(int ac,char ** av)927 int main(int ac, char **av)
928 {
929 	char *mode;
930 	int res;
931 
932 	signal(SIGINT, sig_handler);
933 
934 	if (ac > 1 && strcmp(av[1], "-s") == 0) {
935 		silent = 1;
936 		/* Silence conf_read() until the real callback is set up */
937 		conf_set_message_callback(NULL);
938 		av++;
939 	}
940 	conf_parse(av[1]);
941 	conf_read(NULL);
942 
943 	mode = getenv("MENUCONFIG_MODE");
944 	if (mode) {
945 		if (!strcasecmp(mode, "single_menu"))
946 			single_menu_mode = 1;
947 	}
948 
949 	if (init_dialog(NULL)) {
950 		fprintf(stderr, "Your display is too small to run Menuconfig!\n");
951 		fprintf(stderr, "It must be at least 19 lines by 80 columns.\n");
952 		return 1;
953 	}
954 
955 	set_config_filename(conf_get_configname());
956 	conf_set_message_callback(conf_message_callback);
957 	do {
958 		conf(&rootmenu, NULL);
959 		res = handle_exit();
960 	} while (res == KEY_ESC);
961 
962 	return res;
963 }
964