xref: /openbmc/linux/scripts/kconfig/mconf.c (revision 59dfa24d)
1 /*
2  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3  * Released under the terms of the GNU GPL v2.0.
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 <unistd.h>
19 #include <locale.h>
20 
21 #define LKC_DIRECT_LINK
22 #include "lkc.h"
23 #include "lxdialog/dialog.h"
24 
25 static const char mconf_readme[] = N_(
26 "Overview\n"
27 "--------\n"
28 "Some kernel features may be built directly into the kernel.\n"
29 "Some may be made into loadable runtime modules.  Some features\n"
30 "may be completely removed altogether.  There are also certain\n"
31 "kernel parameters which are not really features, but must be\n"
32 "entered in as decimal or hexadecimal numbers or possibly text.\n"
33 "\n"
34 "Menu items beginning with following braces represent features that\n"
35 "  [ ] can be built in or removed\n"
36 "  < > can be built in, modularized or removed\n"
37 "  { } can be built in or modularized (selected by other feature)\n"
38 "  - - are selected by other feature,\n"
39 "while *, M or whitespace inside braces means to build in, build as\n"
40 "a module or to exclude the feature respectively.\n"
41 "\n"
42 "To change any of these features, highlight it with the cursor\n"
43 "keys and press <Y> to build it in, <M> to make it a module or\n"
44 "<N> to removed it.  You may also press the <Space Bar> to cycle\n"
45 "through the available options (ie. Y->N->M->Y).\n"
46 "\n"
47 "Some additional keyboard hints:\n"
48 "\n"
49 "Menus\n"
50 "----------\n"
51 "o  Use the Up/Down arrow keys (cursor keys) to highlight the item\n"
52 "   you wish to change or submenu wish to select and press <Enter>.\n"
53 "   Submenus are designated by \"--->\".\n"
54 "\n"
55 "   Shortcut: Press the option's highlighted letter (hotkey).\n"
56 "             Pressing a hotkey more than once will sequence\n"
57 "             through all visible items which use that hotkey.\n"
58 "\n"
59 "   You may also use the <PAGE UP> and <PAGE DOWN> keys to scroll\n"
60 "   unseen options into view.\n"
61 "\n"
62 "o  To exit a menu use the cursor keys to highlight the <Exit> button\n"
63 "   and press <ENTER>.\n"
64 "\n"
65 "   Shortcut: Press <ESC><ESC> or <E> or <X> if there is no hotkey\n"
66 "             using those letters.  You may press a single <ESC>, but\n"
67 "             there is a delayed response which you may find annoying.\n"
68 "\n"
69 "   Also, the <TAB> and cursor keys will cycle between <Select>,\n"
70 "   <Exit> and <Help>.\n"
71 "\n"
72 "o  To get help with an item, use the cursor keys to highlight <Help>\n"
73 "   and press <ENTER>.\n"
74 "\n"
75 "   Shortcut: Press <H> or <?>.\n"
76 "\n"
77 "o  To toggle the display of hidden options, press <Z>.\n"
78 "\n"
79 "\n"
80 "Radiolists  (Choice lists)\n"
81 "-----------\n"
82 "o  Use the cursor keys to select the option you wish to set and press\n"
83 "   <S> or the <SPACE BAR>.\n"
84 "\n"
85 "   Shortcut: Press the first letter of the option you wish to set then\n"
86 "             press <S> or <SPACE BAR>.\n"
87 "\n"
88 "o  To see available help for the item, use the cursor keys to highlight\n"
89 "   <Help> and Press <ENTER>.\n"
90 "\n"
91 "   Shortcut: Press <H> or <?>.\n"
92 "\n"
93 "   Also, the <TAB> and cursor keys will cycle between <Select> and\n"
94 "   <Help>\n"
95 "\n"
96 "\n"
97 "Data Entry\n"
98 "-----------\n"
99 "o  Enter the requested information and press <ENTER>\n"
100 "   If you are entering hexadecimal values, it is not necessary to\n"
101 "   add the '0x' prefix to the entry.\n"
102 "\n"
103 "o  For help, use the <TAB> or cursor keys to highlight the help option\n"
104 "   and press <ENTER>.  You can try <TAB><H> as well.\n"
105 "\n"
106 "\n"
107 "Text Box    (Help Window)\n"
108 "--------\n"
109 "o  Use the cursor keys to scroll up/down/left/right.  The VI editor\n"
110 "   keys h,j,k,l function here as do <SPACE BAR> and <B> for those\n"
111 "   who are familiar with less and lynx.\n"
112 "\n"
113 "o  Press <E>, <X>, <Enter> or <Esc><Esc> to exit.\n"
114 "\n"
115 "\n"
116 "Alternate Configuration Files\n"
117 "-----------------------------\n"
118 "Menuconfig supports the use of alternate configuration files for\n"
119 "those who, for various reasons, find it necessary to switch\n"
120 "between different kernel configurations.\n"
121 "\n"
122 "At the end of the main menu you will find two options.  One is\n"
123 "for saving the current configuration to a file of your choosing.\n"
124 "The other option is for loading a previously saved alternate\n"
125 "configuration.\n"
126 "\n"
127 "Even if you don't use alternate configuration files, but you\n"
128 "find during a Menuconfig session that you have completely messed\n"
129 "up your settings, you may use the \"Load Alternate...\" option to\n"
130 "restore your previously saved settings from \".config\" without\n"
131 "restarting Menuconfig.\n"
132 "\n"
133 "Other information\n"
134 "-----------------\n"
135 "If you use Menuconfig in an XTERM window make sure you have your\n"
136 "$TERM variable set to point to a xterm definition which supports color.\n"
137 "Otherwise, Menuconfig will look rather bad.  Menuconfig will not\n"
138 "display correctly in a RXVT window because rxvt displays only one\n"
139 "intensity of color, bright.\n"
140 "\n"
141 "Menuconfig will display larger menus on screens or xterms which are\n"
142 "set to display more than the standard 25 row by 80 column geometry.\n"
143 "In order for this to work, the \"stty size\" command must be able to\n"
144 "display the screen's current row and column geometry.  I STRONGLY\n"
145 "RECOMMEND that you make sure you do NOT have the shell variables\n"
146 "LINES and COLUMNS exported into your environment.  Some distributions\n"
147 "export those variables via /etc/profile.  Some ncurses programs can\n"
148 "become confused when those variables (LINES & COLUMNS) don't reflect\n"
149 "the true screen size.\n"
150 "\n"
151 "Optional personality available\n"
152 "------------------------------\n"
153 "If you prefer to have all of the kernel options listed in a single\n"
154 "menu, rather than the default multimenu hierarchy, run the menuconfig\n"
155 "with MENUCONFIG_MODE environment variable set to single_menu. Example:\n"
156 "\n"
157 "make MENUCONFIG_MODE=single_menu menuconfig\n"
158 "\n"
159 "<Enter> will then unroll the appropriate category, or enfold it if it\n"
160 "is already unrolled.\n"
161 "\n"
162 "Note that this mode can eventually be a little more CPU expensive\n"
163 "(especially with a larger number of unrolled categories) than the\n"
164 "default mode.\n"
165 "\n"
166 "Different color themes available\n"
167 "--------------------------------\n"
168 "It is possible to select different color themes using the variable\n"
169 "MENUCONFIG_COLOR. To select a theme use:\n"
170 "\n"
171 "make MENUCONFIG_COLOR=<theme> menuconfig\n"
172 "\n"
173 "Available themes are\n"
174 " mono       => selects colors suitable for monochrome displays\n"
175 " blackbg    => selects a color scheme with black background\n"
176 " classic    => theme with blue background. The classic look\n"
177 " bluetitle  => a LCD friendly version of classic. (default)\n"
178 "\n"),
179 menu_instructions[] = N_(
180 	"Arrow keys navigate the menu.  "
181 	"<Enter> selects submenus --->.  "
182 	"Highlighted letters are hotkeys.  "
183 	"Pressing <Y> includes, <N> excludes, <M> modularizes features.  "
184 	"Press <Esc><Esc> to exit, <?> for Help, </> for Search.  "
185 	"Legend: [*] built-in  [ ] excluded  <M> module  < > module capable"),
186 radiolist_instructions[] = N_(
187 	"Use the arrow keys to navigate this window or "
188 	"press the hotkey of the item you wish to select "
189 	"followed by the <SPACE BAR>. "
190 	"Press <?> for additional information about this option."),
191 inputbox_instructions_int[] = N_(
192 	"Please enter a decimal value. "
193 	"Fractions will not be accepted.  "
194 	"Use the <TAB> key to move from the input field to the buttons below it."),
195 inputbox_instructions_hex[] = N_(
196 	"Please enter a hexadecimal value. "
197 	"Use the <TAB> key to move from the input field to the buttons below it."),
198 inputbox_instructions_string[] = N_(
199 	"Please enter a string value. "
200 	"Use the <TAB> key to move from the input field to the buttons below it."),
201 setmod_text[] = N_(
202 	"This feature depends on another which has been configured as a module.\n"
203 	"As a result, this feature will be built as a module."),
204 load_config_text[] = N_(
205 	"Enter the name of the configuration file you wish to load.  "
206 	"Accept the name shown to restore the configuration you "
207 	"last retrieved.  Leave blank to abort."),
208 load_config_help[] = N_(
209 	"\n"
210 	"For various reasons, one may wish to keep several different kernel\n"
211 	"configurations available on a single machine.\n"
212 	"\n"
213 	"If you have saved a previous configuration in a file other than the\n"
214 	"kernel's default, entering the name of the file here will allow you\n"
215 	"to modify that configuration.\n"
216 	"\n"
217 	"If you are uncertain, then you have probably never used alternate\n"
218 	"configuration files. You should therefore leave this blank to abort.\n"),
219 save_config_text[] = N_(
220 	"Enter a filename to which this configuration should be saved "
221 	"as an alternate.  Leave blank to abort."),
222 save_config_help[] = N_(
223 	"\n"
224 	"For various reasons, one may wish to keep different kernel\n"
225 	"configurations available on a single machine.\n"
226 	"\n"
227 	"Entering a file name here will allow you to later retrieve, modify\n"
228 	"and use the current configuration as an alternate to whatever\n"
229 	"configuration options you have selected at that time.\n"
230 	"\n"
231 	"If you are uncertain what all this means then you should probably\n"
232 	"leave this blank.\n"),
233 search_help[] = N_(
234 	"\n"
235 	"Search for symbols and display their relations.\n"
236 	"Regular expressions are allowed.\n"
237 	"Example: search for \"^FOO\"\n"
238 	"Result:\n"
239 	"-----------------------------------------------------------------\n"
240 	"Symbol: FOO [=m]\n"
241 	"Prompt: Foo bus is used to drive the bar HW\n"
242 	"Defined at drivers/pci/Kconfig:47\n"
243 	"Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
244 	"Location:\n"
245 	"  -> Bus options (PCI, PCMCIA, EISA, MCA, ISA)\n"
246 	"    -> PCI support (PCI [=y])\n"
247 	"      -> PCI access mode (<choice> [=y])\n"
248 	"Selects: LIBCRC32\n"
249 	"Selected by: BAR\n"
250 	"-----------------------------------------------------------------\n"
251 	"o The line 'Prompt:' shows the text used in the menu structure for\n"
252 	"  this symbol\n"
253 	"o The 'Defined at' line tell at what file / line number the symbol\n"
254 	"  is defined\n"
255 	"o The 'Depends on:' line tell what symbols needs to be defined for\n"
256 	"  this symbol to be visible in the menu (selectable)\n"
257 	"o The 'Location:' lines tell where in the menu structure this symbol\n"
258 	"  is located\n"
259 	"    A location followed by a [=y] indicate that this is a selectable\n"
260 	"    menu item - and current value is displayed inside brackets.\n"
261 	"o The 'Selects:' line tell what symbol will be automatically\n"
262 	"  selected if this symbol is selected (y or m)\n"
263 	"o The 'Selected by' line tell what symbol has selected this symbol\n"
264 	"\n"
265 	"Only relevant lines are shown.\n"
266 	"\n\n"
267 	"Search examples:\n"
268 	"Examples: USB	=> find all symbols containing USB\n"
269 	"          ^USB => find all symbols starting with USB\n"
270 	"          USB$ => find all symbols ending with USB\n"
271 	"\n");
272 
273 static int indent;
274 static struct menu *current_menu;
275 static int child_count;
276 static int single_menu_mode;
277 static int show_all_options;
278 
279 static void conf(struct menu *menu);
280 static void conf_choice(struct menu *menu);
281 static void conf_string(struct menu *menu);
282 static void conf_load(void);
283 static void conf_save(void);
284 static void show_textbox(const char *title, const char *text, int r, int c);
285 static void show_helptext(const char *title, const char *text);
286 static void show_help(struct menu *menu);
287 
288 static char filename[PATH_MAX+1];
289 static void set_config_filename(const char *config_filename)
290 {
291 	static char menu_backtitle[PATH_MAX+128];
292 	int size;
293 	struct symbol *sym;
294 
295 	sym = sym_lookup("KERNELVERSION", 0);
296 	sym_calc_value(sym);
297 	size = snprintf(menu_backtitle, sizeof(menu_backtitle),
298 	                _("%s - Linux Kernel v%s Configuration"),
299 		        config_filename, sym_get_string_value(sym));
300 	if (size >= sizeof(menu_backtitle))
301 		menu_backtitle[sizeof(menu_backtitle)-1] = '\0';
302 	set_dialog_backtitle(menu_backtitle);
303 
304 	size = snprintf(filename, sizeof(filename), "%s", config_filename);
305 	if (size >= sizeof(filename))
306 		filename[sizeof(filename)-1] = '\0';
307 }
308 
309 
310 static void search_conf(void)
311 {
312 	struct symbol **sym_arr;
313 	struct gstr res;
314 	char *dialog_input;
315 	int dres;
316 again:
317 	dialog_clear();
318 	dres = dialog_inputbox(_("Search Configuration Parameter"),
319 			      _("Enter CONFIG_ (sub)string to search for "
320 				"(with or without \"CONFIG\")"),
321 			      10, 75, "");
322 	switch (dres) {
323 	case 0:
324 		break;
325 	case 1:
326 		show_helptext(_("Search Configuration"), search_help);
327 		goto again;
328 	default:
329 		return;
330 	}
331 
332 	/* strip CONFIG_ if necessary */
333 	dialog_input = dialog_input_result;
334 	if (strncasecmp(dialog_input_result, "CONFIG_", 7) == 0)
335 		dialog_input += 7;
336 
337 	sym_arr = sym_re_search(dialog_input);
338 	res = get_relations_str(sym_arr);
339 	free(sym_arr);
340 	show_textbox(_("Search Results"), str_get(&res), 0, 0);
341 	str_free(&res);
342 }
343 
344 static void build_conf(struct menu *menu)
345 {
346 	struct symbol *sym;
347 	struct property *prop;
348 	struct menu *child;
349 	int type, tmp, doint = 2;
350 	tristate val;
351 	char ch;
352 	bool visible;
353 
354 	/*
355 	 * note: menu_is_visible() has side effect that it will
356 	 * recalc the value of the symbol.
357 	 */
358 	visible = menu_is_visible(menu);
359 	if (show_all_options && !menu_has_prompt(menu))
360 		return;
361 	else if (!show_all_options && !visible)
362 		return;
363 
364 	sym = menu->sym;
365 	prop = menu->prompt;
366 	if (!sym) {
367 		if (prop && menu != current_menu) {
368 			const char *prompt = menu_get_prompt(menu);
369 			switch (prop->type) {
370 			case P_MENU:
371 				child_count++;
372 				prompt = _(prompt);
373 				if (single_menu_mode) {
374 					item_make("%s%*c%s",
375 						  menu->data ? "-->" : "++>",
376 						  indent + 1, ' ', prompt);
377 				} else
378 					item_make("   %*c%s  --->", indent + 1, ' ', prompt);
379 
380 				item_set_tag('m');
381 				item_set_data(menu);
382 				if (single_menu_mode && menu->data)
383 					goto conf_childs;
384 				return;
385 			case P_COMMENT:
386 				if (prompt) {
387 					child_count++;
388 					item_make("   %*c*** %s ***", indent + 1, ' ', _(prompt));
389 					item_set_tag(':');
390 					item_set_data(menu);
391 				}
392 				break;
393 			default:
394 				if (prompt) {
395 					child_count++;
396 					item_make("---%*c%s", indent + 1, ' ', _(prompt));
397 					item_set_tag(':');
398 					item_set_data(menu);
399 				}
400 			}
401 		} else
402 			doint = 0;
403 		goto conf_childs;
404 	}
405 
406 	type = sym_get_type(sym);
407 	if (sym_is_choice(sym)) {
408 		struct symbol *def_sym = sym_get_choice_value(sym);
409 		struct menu *def_menu = NULL;
410 
411 		child_count++;
412 		for (child = menu->list; child; child = child->next) {
413 			if (menu_is_visible(child) && child->sym == def_sym)
414 				def_menu = child;
415 		}
416 
417 		val = sym_get_tristate_value(sym);
418 		if (sym_is_changable(sym)) {
419 			switch (type) {
420 			case S_BOOLEAN:
421 				item_make("[%c]", val == no ? ' ' : '*');
422 				break;
423 			case S_TRISTATE:
424 				switch (val) {
425 				case yes: ch = '*'; break;
426 				case mod: ch = 'M'; break;
427 				default:  ch = ' '; break;
428 				}
429 				item_make("<%c>", ch);
430 				break;
431 			}
432 			item_set_tag('t');
433 			item_set_data(menu);
434 		} else {
435 			item_make("   ");
436 			item_set_tag(def_menu ? 't' : ':');
437 			item_set_data(menu);
438 		}
439 
440 		item_add_str("%*c%s", indent + 1, ' ', _(menu_get_prompt(menu)));
441 		if (val == yes) {
442 			if (def_menu) {
443 				item_add_str(" (%s)", _(menu_get_prompt(def_menu)));
444 				item_add_str("  --->");
445 				if (def_menu->list) {
446 					indent += 2;
447 					build_conf(def_menu);
448 					indent -= 2;
449 				}
450 			}
451 			return;
452 		}
453 	} else {
454 		if (menu == current_menu) {
455 			item_make("---%*c%s", indent + 1, ' ', _(menu_get_prompt(menu)));
456 			item_set_tag(':');
457 			item_set_data(menu);
458 			goto conf_childs;
459 		}
460 		child_count++;
461 		val = sym_get_tristate_value(sym);
462 		if (sym_is_choice_value(sym) && val == yes) {
463 			item_make("   ");
464 			item_set_tag(':');
465 			item_set_data(menu);
466 		} else {
467 			switch (type) {
468 			case S_BOOLEAN:
469 				if (sym_is_changable(sym))
470 					item_make("[%c]", val == no ? ' ' : '*');
471 				else
472 					item_make("-%c-", val == no ? ' ' : '*');
473 				item_set_tag('t');
474 				item_set_data(menu);
475 				break;
476 			case S_TRISTATE:
477 				switch (val) {
478 				case yes: ch = '*'; break;
479 				case mod: ch = 'M'; break;
480 				default:  ch = ' '; break;
481 				}
482 				if (sym_is_changable(sym)) {
483 					if (sym->rev_dep.tri == mod)
484 						item_make("{%c}", ch);
485 					else
486 						item_make("<%c>", ch);
487 				} else
488 					item_make("-%c-", ch);
489 				item_set_tag('t');
490 				item_set_data(menu);
491 				break;
492 			default:
493 				tmp = 2 + strlen(sym_get_string_value(sym)); /* () = 2 */
494 				item_make("(%s)", sym_get_string_value(sym));
495 				tmp = indent - tmp + 4;
496 				if (tmp < 0)
497 					tmp = 0;
498 				item_add_str("%*c%s%s", tmp, ' ', _(menu_get_prompt(menu)),
499 					     (sym_has_value(sym) || !sym_is_changable(sym)) ?
500 					     "" : _(" (NEW)"));
501 				item_set_tag('s');
502 				item_set_data(menu);
503 				goto conf_childs;
504 			}
505 		}
506 		item_add_str("%*c%s%s", indent + 1, ' ', _(menu_get_prompt(menu)),
507 			  (sym_has_value(sym) || !sym_is_changable(sym)) ?
508 			  "" : _(" (NEW)"));
509 		if (menu->prompt->type == P_MENU) {
510 			item_add_str("  --->");
511 			return;
512 		}
513 	}
514 
515 conf_childs:
516 	indent += doint;
517 	for (child = menu->list; child; child = child->next)
518 		build_conf(child);
519 	indent -= doint;
520 }
521 
522 static void conf(struct menu *menu)
523 {
524 	struct menu *submenu;
525 	const char *prompt = menu_get_prompt(menu);
526 	struct symbol *sym;
527 	struct menu *active_menu = NULL;
528 	int res;
529 	int s_scroll = 0;
530 
531 	while (1) {
532 		item_reset();
533 		current_menu = menu;
534 		build_conf(menu);
535 		if (!child_count)
536 			break;
537 		if (menu == &rootmenu) {
538 			item_make("--- ");
539 			item_set_tag(':');
540 			item_make(_("    Load an Alternate Configuration File"));
541 			item_set_tag('L');
542 			item_make(_("    Save an Alternate Configuration File"));
543 			item_set_tag('S');
544 		}
545 		dialog_clear();
546 		res = dialog_menu(prompt ? _(prompt) : _("Main Menu"),
547 				  _(menu_instructions),
548 				  active_menu, &s_scroll);
549 		if (res == 1 || res == KEY_ESC || res == -ERRDISPLAYTOOSMALL)
550 			break;
551 		if (!item_activate_selected())
552 			continue;
553 		if (!item_tag())
554 			continue;
555 
556 		submenu = item_data();
557 		active_menu = item_data();
558 		if (submenu)
559 			sym = submenu->sym;
560 		else
561 			sym = NULL;
562 
563 		switch (res) {
564 		case 0:
565 			switch (item_tag()) {
566 			case 'm':
567 				if (single_menu_mode)
568 					submenu->data = (void *) (long) !submenu->data;
569 				else
570 					conf(submenu);
571 				break;
572 			case 't':
573 				if (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)
574 					conf_choice(submenu);
575 				else if (submenu->prompt->type == P_MENU)
576 					conf(submenu);
577 				break;
578 			case 's':
579 				conf_string(submenu);
580 				break;
581 			case 'L':
582 				conf_load();
583 				break;
584 			case 'S':
585 				conf_save();
586 				break;
587 			}
588 			break;
589 		case 2:
590 			if (sym)
591 				show_help(submenu);
592 			else
593 				show_helptext(_("README"), _(mconf_readme));
594 			break;
595 		case 3:
596 			if (item_is_tag('t')) {
597 				if (sym_set_tristate_value(sym, yes))
598 					break;
599 				if (sym_set_tristate_value(sym, mod))
600 					show_textbox(NULL, setmod_text, 6, 74);
601 			}
602 			break;
603 		case 4:
604 			if (item_is_tag('t'))
605 				sym_set_tristate_value(sym, no);
606 			break;
607 		case 5:
608 			if (item_is_tag('t'))
609 				sym_set_tristate_value(sym, mod);
610 			break;
611 		case 6:
612 			if (item_is_tag('t'))
613 				sym_toggle_tristate_value(sym);
614 			else if (item_is_tag('m'))
615 				conf(submenu);
616 			break;
617 		case 7:
618 			search_conf();
619 			break;
620 		case 8:
621 			show_all_options = !show_all_options;
622 			break;
623 		}
624 	}
625 }
626 
627 static void show_textbox(const char *title, const char *text, int r, int c)
628 {
629 	dialog_clear();
630 	dialog_textbox(title, text, r, c);
631 }
632 
633 static void show_helptext(const char *title, const char *text)
634 {
635 	show_textbox(title, text, 0, 0);
636 }
637 
638 static void show_help(struct menu *menu)
639 {
640 	struct gstr help = str_new();
641 
642 	help.max_width = getmaxx(stdscr) - 10;
643 	menu_get_ext_help(menu, &help);
644 
645 	show_helptext(_(menu_get_prompt(menu)), str_get(&help));
646 	str_free(&help);
647 }
648 
649 static void conf_choice(struct menu *menu)
650 {
651 	const char *prompt = _(menu_get_prompt(menu));
652 	struct menu *child;
653 	struct symbol *active;
654 
655 	active = sym_get_choice_value(menu->sym);
656 	while (1) {
657 		int res;
658 		int selected;
659 		item_reset();
660 
661 		current_menu = menu;
662 		for (child = menu->list; child; child = child->next) {
663 			if (!menu_is_visible(child))
664 				continue;
665 			if (child->sym)
666 				item_make("%s", _(menu_get_prompt(child)));
667 			else {
668 				item_make("*** %s ***", _(menu_get_prompt(child)));
669 				item_set_tag(':');
670 			}
671 			item_set_data(child);
672 			if (child->sym == active)
673 				item_set_selected(1);
674 			if (child->sym == sym_get_choice_value(menu->sym))
675 				item_set_tag('X');
676 		}
677 		dialog_clear();
678 		res = dialog_checklist(prompt ? _(prompt) : _("Main Menu"),
679 					_(radiolist_instructions),
680 					 15, 70, 6);
681 		selected = item_activate_selected();
682 		switch (res) {
683 		case 0:
684 			if (selected) {
685 				child = item_data();
686 				if (!child->sym)
687 					break;
688 
689 				sym_set_tristate_value(child->sym, yes);
690 			}
691 			return;
692 		case 1:
693 			if (selected) {
694 				child = item_data();
695 				show_help(child);
696 				active = child->sym;
697 			} else
698 				show_help(menu);
699 			break;
700 		case KEY_ESC:
701 			return;
702 		case -ERRDISPLAYTOOSMALL:
703 			return;
704 		}
705 	}
706 }
707 
708 static void conf_string(struct menu *menu)
709 {
710 	const char *prompt = menu_get_prompt(menu);
711 
712 	while (1) {
713 		int res;
714 		const char *heading;
715 
716 		switch (sym_get_type(menu->sym)) {
717 		case S_INT:
718 			heading = _(inputbox_instructions_int);
719 			break;
720 		case S_HEX:
721 			heading = _(inputbox_instructions_hex);
722 			break;
723 		case S_STRING:
724 			heading = _(inputbox_instructions_string);
725 			break;
726 		default:
727 			heading = _("Internal mconf error!");
728 		}
729 		dialog_clear();
730 		res = dialog_inputbox(prompt ? _(prompt) : _("Main Menu"),
731 				      heading, 10, 75,
732 				      sym_get_string_value(menu->sym));
733 		switch (res) {
734 		case 0:
735 			if (sym_set_string_value(menu->sym, dialog_input_result))
736 				return;
737 			show_textbox(NULL, _("You have made an invalid entry."), 5, 43);
738 			break;
739 		case 1:
740 			show_help(menu);
741 			break;
742 		case KEY_ESC:
743 			return;
744 		}
745 	}
746 }
747 
748 static void conf_load(void)
749 {
750 
751 	while (1) {
752 		int res;
753 		dialog_clear();
754 		res = dialog_inputbox(NULL, load_config_text,
755 				      11, 55, filename);
756 		switch(res) {
757 		case 0:
758 			if (!dialog_input_result[0])
759 				return;
760 			if (!conf_read(dialog_input_result)) {
761 				set_config_filename(dialog_input_result);
762 				sym_set_change_count(1);
763 				return;
764 			}
765 			show_textbox(NULL, _("File does not exist!"), 5, 38);
766 			break;
767 		case 1:
768 			show_helptext(_("Load Alternate Configuration"), load_config_help);
769 			break;
770 		case KEY_ESC:
771 			return;
772 		}
773 	}
774 }
775 
776 static void conf_save(void)
777 {
778 	while (1) {
779 		int res;
780 		dialog_clear();
781 		res = dialog_inputbox(NULL, save_config_text,
782 				      11, 55, filename);
783 		switch(res) {
784 		case 0:
785 			if (!dialog_input_result[0])
786 				return;
787 			if (!conf_write(dialog_input_result)) {
788 				set_config_filename(dialog_input_result);
789 				return;
790 			}
791 			show_textbox(NULL, _("Can't create file!  Probably a nonexistent directory."), 5, 60);
792 			break;
793 		case 1:
794 			show_helptext(_("Save Alternate Configuration"), save_config_help);
795 			break;
796 		case KEY_ESC:
797 			return;
798 		}
799 	}
800 }
801 
802 int main(int ac, char **av)
803 {
804 	int saved_x, saved_y;
805 	char *mode;
806 	int res;
807 
808 	setlocale(LC_ALL, "");
809 	bindtextdomain(PACKAGE, LOCALEDIR);
810 	textdomain(PACKAGE);
811 
812 	conf_parse(av[1]);
813 	conf_read(NULL);
814 
815 	mode = getenv("MENUCONFIG_MODE");
816 	if (mode) {
817 		if (!strcasecmp(mode, "single_menu"))
818 			single_menu_mode = 1;
819 	}
820 
821 	initscr();
822 
823 	getyx(stdscr, saved_y, saved_x);
824 	if (init_dialog(NULL)) {
825 		fprintf(stderr, N_("Your display is too small to run Menuconfig!\n"));
826 		fprintf(stderr, N_("It must be at least 19 lines by 80 columns.\n"));
827 		return 1;
828 	}
829 
830 	set_config_filename(conf_get_configname());
831 	do {
832 		conf(&rootmenu);
833 		dialog_clear();
834 		if (conf_get_changed())
835 			res = dialog_yesno(NULL,
836 					   _("Do you wish to save your "
837 					     "new kernel configuration?\n"
838 					     "<ESC><ESC> to continue."),
839 					   6, 60);
840 		else
841 			res = -1;
842 	} while (res == KEY_ESC);
843 	end_dialog(saved_x, saved_y);
844 
845 	switch (res) {
846 	case 0:
847 		if (conf_write(filename)) {
848 			fprintf(stderr, _("\n\n"
849 				"Error during writing of the kernel configuration.\n"
850 				"Your kernel configuration changes were NOT saved."
851 				"\n\n"));
852 			return 1;
853 		}
854 	case -1:
855 		printf(_("\n\n"
856 			"*** End of Linux kernel configuration.\n"
857 			"*** Execute 'make' to build the kernel or try 'make help'."
858 			"\n\n"));
859 		break;
860 	default:
861 		fprintf(stderr, _("\n\n"
862 			"Your kernel configuration changes were NOT saved."
863 			"\n\n"));
864 	}
865 
866 	return 0;
867 }
868 
869