xref: /openbmc/linux/scripts/kconfig/nconf.c (revision 8957261c)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com>
4  *
5  * Derived from menuconfig.
6  */
7 #ifndef _GNU_SOURCE
8 #define _GNU_SOURCE
9 #endif
10 #include <string.h>
11 #include <strings.h>
12 #include <stdlib.h>
13 
14 #include "lkc.h"
15 #include "nconf.h"
16 #include <ctype.h>
17 
18 static const char nconf_global_help[] =
19 "Help windows\n"
20 "------------\n"
21 "o  Global help:  Unless in a data entry window, pressing <F1> will give \n"
22 "   you the global help window, which you are just reading.\n"
23 "\n"
24 "o  A short version of the global help is available by pressing <F3>.\n"
25 "\n"
26 "o  Local help:  To get help related to the current menu entry, use any\n"
27 "   of <?> <h>, or if in a data entry window then press <F1>.\n"
28 "\n"
29 "\n"
30 "Menu entries\n"
31 "------------\n"
32 "This interface lets you select features and parameters for the kernel\n"
33 "build.  Kernel features can either be built-in, modularized, or removed.\n"
34 "Parameters must be entered as text or decimal or hexadecimal numbers.\n"
35 "\n"
36 "Menu entries beginning with following braces represent features that\n"
37 "  [ ]  can be built in or removed\n"
38 "  < >  can be built in, modularized or removed\n"
39 "  { }  can be built in or modularized, are selected by another feature\n"
40 "  - -  are selected by another feature\n"
41 "  XXX  cannot be selected.  Symbol Info <F2> tells you why.\n"
42 "*, M or whitespace inside braces means to build in, build as a module\n"
43 "or to exclude the feature respectively.\n"
44 "\n"
45 "To change any of these features, highlight it with the movement keys\n"
46 "listed below and press <y> to build it in, <m> to make it a module or\n"
47 "<n> to remove it.  You may press the <Space> key to cycle through the\n"
48 "available options.\n"
49 "\n"
50 "A trailing \"--->\" designates a submenu, a trailing \"----\" an\n"
51 "empty submenu.\n"
52 "\n"
53 "Menu navigation keys\n"
54 "----------------------------------------------------------------------\n"
55 "Linewise up                 <Up>    <k>\n"
56 "Linewise down               <Down>  <j>\n"
57 "Pagewise up                 <Page Up>\n"
58 "Pagewise down               <Page Down>\n"
59 "First entry                 <Home>\n"
60 "Last entry                  <End>\n"
61 "Enter a submenu             <Right>  <Enter>\n"
62 "Go back to parent menu      <Left>   <Esc>  <F5>\n"
63 "Close a help window         <Enter>  <Esc>  <F5>\n"
64 "Close entry window, apply   <Enter>\n"
65 "Close entry window, forget  <Esc>  <F5>\n"
66 "Start incremental, case-insensitive search for STRING in menu entries,\n"
67 "    no regex support, STRING is displayed in upper left corner\n"
68 "                            </>STRING\n"
69 "    Remove last character   <Backspace>\n"
70 "    Jump to next hit        <Down>\n"
71 "    Jump to previous hit    <Up>\n"
72 "Exit menu search mode       </>  <Esc>\n"
73 "Search for configuration variables with or without leading CONFIG_\n"
74 "                            <F8>RegExpr<Enter>\n"
75 "Verbose search help         <F8><F1>\n"
76 "----------------------------------------------------------------------\n"
77 "\n"
78 "Unless in a data entry window, key <1> may be used instead of <F1>,\n"
79 "<2> instead of <F2>, etc.\n"
80 "\n"
81 "\n"
82 "Radiolist (Choice list)\n"
83 "-----------------------\n"
84 "Use the movement keys listed above to select the option you wish to set\n"
85 "and press <Space>.\n"
86 "\n"
87 "\n"
88 "Data entry\n"
89 "----------\n"
90 "Enter the requested information and press <Enter>.  Hexadecimal values\n"
91 "may be entered without the \"0x\" prefix.\n"
92 "\n"
93 "\n"
94 "Text Box (Help Window)\n"
95 "----------------------\n"
96 "Use movement keys as listed in table above.\n"
97 "\n"
98 "Press any of <Enter> <Esc> <q> <F5> <F9> to exit.\n"
99 "\n"
100 "\n"
101 "Alternate configuration files\n"
102 "-----------------------------\n"
103 "nconfig supports switching between different configurations.\n"
104 "Press <F6> to save your current configuration.  Press <F7> and enter\n"
105 "a file name to load a previously saved configuration.\n"
106 "\n"
107 "\n"
108 "Terminal configuration\n"
109 "----------------------\n"
110 "If you use nconfig in a xterm window, make sure your TERM environment\n"
111 "variable specifies a terminal configuration which supports at least\n"
112 "16 colors.  Otherwise nconfig will look rather bad.\n"
113 "\n"
114 "If the \"stty size\" command reports the current terminalsize correctly,\n"
115 "nconfig will adapt to sizes larger than the traditional 80x25 \"standard\"\n"
116 "and display longer menus properly.\n"
117 "\n"
118 "\n"
119 "Single menu mode\n"
120 "----------------\n"
121 "If you prefer to have all of the menu entries listed in a single menu,\n"
122 "rather than the default multimenu hierarchy, run nconfig with\n"
123 "NCONFIG_MODE environment variable set to single_menu.  Example:\n"
124 "\n"
125 "make NCONFIG_MODE=single_menu nconfig\n"
126 "\n"
127 "<Enter> will then unfold the appropriate category, or fold it if it\n"
128 "is already unfolded.  Folded menu entries will be designated by a\n"
129 "leading \"++>\" and unfolded entries by a leading \"-->\".\n"
130 "\n"
131 "Note that this mode can eventually be a little more CPU expensive than\n"
132 "the default mode, especially with a larger number of unfolded submenus.\n"
133 "\n",
134 menu_no_f_instructions[] =
135 "Legend:  [*] built-in  [ ] excluded  <M> module  < > module capable.\n"
136 "Submenus are designated by a trailing \"--->\", empty ones by \"----\".\n"
137 "\n"
138 "Use the following keys to navigate the menus:\n"
139 "Move up or down with <Up> and <Down>.\n"
140 "Enter a submenu with <Enter> or <Right>.\n"
141 "Exit a submenu to its parent menu with <Esc> or <Left>.\n"
142 "Pressing <y> includes, <n> excludes, <m> modularizes features.\n"
143 "Pressing <Space> cycles through the available options.\n"
144 "To search for menu entries press </>.\n"
145 "<Esc> always leaves the current window.\n"
146 "\n"
147 "You do not have function keys support.\n"
148 "Press <1> instead of <F1>, <2> instead of <F2>, etc.\n"
149 "For verbose global help use key <1>.\n"
150 "For help related to the current menu entry press <?> or <h>.\n",
151 menu_instructions[] =
152 "Legend:  [*] built-in  [ ] excluded  <M> module  < > module capable.\n"
153 "Submenus are designated by a trailing \"--->\", empty ones by \"----\".\n"
154 "\n"
155 "Use the following keys to navigate the menus:\n"
156 "Move up or down with <Up> or <Down>.\n"
157 "Enter a submenu with <Enter> or <Right>.\n"
158 "Exit a submenu to its parent menu with <Esc> or <Left>.\n"
159 "Pressing <y> includes, <n> excludes, <m> modularizes features.\n"
160 "Pressing <Space> cycles through the available options.\n"
161 "To search for menu entries press </>.\n"
162 "<Esc> always leaves the current window.\n"
163 "\n"
164 "Pressing <1> may be used instead of <F1>, <2> instead of <F2>, etc.\n"
165 "For verbose global help press <F1>.\n"
166 "For help related to the current menu entry press <?> or <h>.\n",
167 radiolist_instructions[] =
168 "Press <Up>, <Down>, <Home> or <End> to navigate a radiolist, select\n"
169 "with <Space>.\n"
170 "For help related to the current entry press <?> or <h>.\n"
171 "For global help press <F1>.\n",
172 inputbox_instructions_int[] =
173 "Please enter a decimal value.\n"
174 "Fractions will not be accepted.\n"
175 "Press <Enter> to apply, <Esc> to cancel.",
176 inputbox_instructions_hex[] =
177 "Please enter a hexadecimal value.\n"
178 "Press <Enter> to apply, <Esc> to cancel.",
179 inputbox_instructions_string[] =
180 "Please enter a string value.\n"
181 "Press <Enter> to apply, <Esc> to cancel.",
182 setmod_text[] =
183 "This feature depends on another feature which has been configured as a\n"
184 "module.  As a result, the current feature will be built as a module too.",
185 load_config_text[] =
186 "Enter the name of the configuration file you wish to load.\n"
187 "Accept the name shown to restore the configuration you last\n"
188 "retrieved.  Leave empty to abort.",
189 load_config_help[] =
190 "For various reasons, one may wish to keep several different\n"
191 "configurations available on a single machine.\n"
192 "\n"
193 "If you have saved a previous configuration in a file other than the\n"
194 "default one, entering its name here will allow you to load and modify\n"
195 "that configuration.\n"
196 "\n"
197 "Leave empty to abort.\n",
198 save_config_text[] =
199 "Enter a filename to which this configuration should be saved\n"
200 "as an alternate.  Leave empty to abort.",
201 save_config_help[] =
202 "For various reasons, one may wish to keep several different\n"
203 "configurations available on a single machine.\n"
204 "\n"
205 "Entering a file name here will allow you to later retrieve, modify\n"
206 "and use the current configuration as an alternate to whatever\n"
207 "configuration options you have selected at that time.\n"
208 "\n"
209 "Leave empty to abort.\n",
210 search_help[] =
211 "Search for symbols (configuration variable names CONFIG_*) and display\n"
212 "their relations.  Regular expressions are supported.\n"
213 "Example:  Search for \"^FOO\".\n"
214 "Result:\n"
215 "-----------------------------------------------------------------\n"
216 "Symbol: FOO [ = m]\n"
217 "Prompt: Foo bus is used to drive the bar HW\n"
218 "Defined at drivers/pci/Kconfig:47\n"
219 "Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
220 "Location:\n"
221 "  -> Bus options (PCI, PCMCIA, EISA, ISA)\n"
222 "    -> PCI support (PCI [ = y])\n"
223 "(1)   -> PCI access mode (<choice> [ = y])\n"
224 "Selects: LIBCRC32\n"
225 "Selected by: BAR\n"
226 "-----------------------------------------------------------------\n"
227 "o  The line 'Prompt:' shows the text displayed for this symbol in\n"
228 "   the menu hierarchy.\n"
229 "o  The 'Defined at' line tells at what file / line number the symbol is\n"
230 "   defined.\n"
231 "o  The 'Depends on:' line lists symbols that need to be defined for\n"
232 "   this symbol to be visible and selectable in the menu.\n"
233 "o  The 'Location:' lines tell, where in the menu structure this symbol\n"
234 "   is located.\n"
235 "     A location followed by a [ = y] indicates that this is\n"
236 "     a selectable menu item, and the current value is displayed inside\n"
237 "     brackets.\n"
238 "     Press the key in the (#) prefix to jump directly to that\n"
239 "     location. You will be returned to the current search results\n"
240 "     after exiting this new menu.\n"
241 "o  The 'Selects:' line tells, what symbol will be automatically selected\n"
242 "   if this symbol is selected (y or m).\n"
243 "o  The 'Selected by' line tells what symbol has selected this symbol.\n"
244 "\n"
245 "Only relevant lines are shown.\n"
246 "\n\n"
247 "Search examples:\n"
248 "USB  => find all symbols containing USB\n"
249 "^USB => find all symbols starting with USB\n"
250 "USB$ => find all symbols ending with USB\n"
251 "\n";
252 
253 struct mitem {
254 	char str[256];
255 	char tag;
256 	void *usrptr;
257 	int is_visible;
258 };
259 
260 #define MAX_MENU_ITEMS 4096
261 static int show_all_items;
262 static int indent;
263 static struct menu *current_menu;
264 static int child_count;
265 static int single_menu_mode;
266 /* the window in which all information appears */
267 static WINDOW *main_window;
268 /* the largest size of the menu window */
269 static int mwin_max_lines;
270 static int mwin_max_cols;
271 /* the window in which we show option buttons */
272 static MENU *curses_menu;
273 static ITEM *curses_menu_items[MAX_MENU_ITEMS];
274 static struct mitem k_menu_items[MAX_MENU_ITEMS];
275 static unsigned int items_num;
276 static int global_exit;
277 /* the currently selected button */
278 static const char *current_instructions = menu_instructions;
279 
280 static char *dialog_input_result;
281 static int dialog_input_result_len;
282 static int jump_key_char;
283 
284 static void selected_conf(struct menu *menu, struct menu *active_menu);
285 static void conf(struct menu *menu);
286 static void conf_choice(struct menu *menu);
287 static void conf_string(struct menu *menu);
288 static void conf_load(void);
289 static void conf_save(void);
290 static void show_help(struct menu *menu);
291 static int do_exit(void);
292 static void setup_windows(void);
293 static void search_conf(void);
294 
295 typedef void (*function_key_handler_t)(int *key, struct menu *menu);
296 static void handle_f1(int *key, struct menu *current_item);
297 static void handle_f2(int *key, struct menu *current_item);
298 static void handle_f3(int *key, struct menu *current_item);
299 static void handle_f4(int *key, struct menu *current_item);
300 static void handle_f5(int *key, struct menu *current_item);
301 static void handle_f6(int *key, struct menu *current_item);
302 static void handle_f7(int *key, struct menu *current_item);
303 static void handle_f8(int *key, struct menu *current_item);
304 static void handle_f9(int *key, struct menu *current_item);
305 
306 struct function_keys {
307 	const char *key_str;
308 	const char *func;
309 	function_key key;
310 	function_key_handler_t handler;
311 };
312 
313 static const int function_keys_num = 9;
314 static struct function_keys function_keys[] = {
315 	{
316 		.key_str = "F1",
317 		.func = "Help",
318 		.key = F_HELP,
319 		.handler = handle_f1,
320 	},
321 	{
322 		.key_str = "F2",
323 		.func = "SymInfo",
324 		.key = F_SYMBOL,
325 		.handler = handle_f2,
326 	},
327 	{
328 		.key_str = "F3",
329 		.func = "Help 2",
330 		.key = F_INSTS,
331 		.handler = handle_f3,
332 	},
333 	{
334 		.key_str = "F4",
335 		.func = "ShowAll",
336 		.key = F_CONF,
337 		.handler = handle_f4,
338 	},
339 	{
340 		.key_str = "F5",
341 		.func = "Back",
342 		.key = F_BACK,
343 		.handler = handle_f5,
344 	},
345 	{
346 		.key_str = "F6",
347 		.func = "Save",
348 		.key = F_SAVE,
349 		.handler = handle_f6,
350 	},
351 	{
352 		.key_str = "F7",
353 		.func = "Load",
354 		.key = F_LOAD,
355 		.handler = handle_f7,
356 	},
357 	{
358 		.key_str = "F8",
359 		.func = "SymSearch",
360 		.key = F_SEARCH,
361 		.handler = handle_f8,
362 	},
363 	{
364 		.key_str = "F9",
365 		.func = "Exit",
366 		.key = F_EXIT,
367 		.handler = handle_f9,
368 	},
369 };
370 
371 static void print_function_line(void)
372 {
373 	int i;
374 	int offset = 1;
375 	const int skip = 1;
376 	int lines = getmaxy(stdscr);
377 
378 	for (i = 0; i < function_keys_num; i++) {
379 		wattrset(main_window, attr_function_highlight);
380 		mvwprintw(main_window, lines-3, offset,
381 				"%s",
382 				function_keys[i].key_str);
383 		wattrset(main_window, attr_function_text);
384 		offset += strlen(function_keys[i].key_str);
385 		mvwprintw(main_window, lines-3,
386 				offset, "%s",
387 				function_keys[i].func);
388 		offset += strlen(function_keys[i].func) + skip;
389 	}
390 	wattrset(main_window, attr_normal);
391 }
392 
393 /* help */
394 static void handle_f1(int *key, struct menu *current_item)
395 {
396 	show_scroll_win(main_window,
397 			"Global help", nconf_global_help);
398 	return;
399 }
400 
401 /* symbole help */
402 static void handle_f2(int *key, struct menu *current_item)
403 {
404 	show_help(current_item);
405 	return;
406 }
407 
408 /* instructions */
409 static void handle_f3(int *key, struct menu *current_item)
410 {
411 	show_scroll_win(main_window,
412 			"Short help",
413 			current_instructions);
414 	return;
415 }
416 
417 /* config */
418 static void handle_f4(int *key, struct menu *current_item)
419 {
420 	int res = btn_dialog(main_window,
421 			"Show all symbols?",
422 			2,
423 			"   <Show All>   ",
424 			"<Don't show all>");
425 	if (res == 0)
426 		show_all_items = 1;
427 	else if (res == 1)
428 		show_all_items = 0;
429 
430 	return;
431 }
432 
433 /* back */
434 static void handle_f5(int *key, struct menu *current_item)
435 {
436 	*key = KEY_LEFT;
437 	return;
438 }
439 
440 /* save */
441 static void handle_f6(int *key, struct menu *current_item)
442 {
443 	conf_save();
444 	return;
445 }
446 
447 /* load */
448 static void handle_f7(int *key, struct menu *current_item)
449 {
450 	conf_load();
451 	return;
452 }
453 
454 /* search */
455 static void handle_f8(int *key, struct menu *current_item)
456 {
457 	search_conf();
458 	return;
459 }
460 
461 /* exit */
462 static void handle_f9(int *key, struct menu *current_item)
463 {
464 	do_exit();
465 	return;
466 }
467 
468 /* return != 0 to indicate the key was handles */
469 static int process_special_keys(int *key, struct menu *menu)
470 {
471 	int i;
472 
473 	if (*key == KEY_RESIZE) {
474 		setup_windows();
475 		return 1;
476 	}
477 
478 	for (i = 0; i < function_keys_num; i++) {
479 		if (*key == KEY_F(function_keys[i].key) ||
480 		    *key == '0' + function_keys[i].key){
481 			function_keys[i].handler(key, menu);
482 			return 1;
483 		}
484 	}
485 
486 	return 0;
487 }
488 
489 static void clean_items(void)
490 {
491 	int i;
492 	for (i = 0; curses_menu_items[i]; i++)
493 		free_item(curses_menu_items[i]);
494 	bzero(curses_menu_items, sizeof(curses_menu_items));
495 	bzero(k_menu_items, sizeof(k_menu_items));
496 	items_num = 0;
497 }
498 
499 typedef enum {MATCH_TINKER_PATTERN_UP, MATCH_TINKER_PATTERN_DOWN,
500 	FIND_NEXT_MATCH_DOWN, FIND_NEXT_MATCH_UP} match_f;
501 
502 /* return the index of the matched item, or -1 if no such item exists */
503 static int get_mext_match(const char *match_str, match_f flag)
504 {
505 	int match_start, index;
506 
507 	/* Do not search if the menu is empty (i.e. items_num == 0) */
508 	match_start = item_index(current_item(curses_menu));
509 	if (match_start == ERR)
510 		return -1;
511 
512 	if (flag == FIND_NEXT_MATCH_DOWN)
513 		++match_start;
514 	else if (flag == FIND_NEXT_MATCH_UP)
515 		--match_start;
516 
517 	match_start = (match_start + items_num) % items_num;
518 	index = match_start;
519 	while (true) {
520 		char *str = k_menu_items[index].str;
521 		if (strcasestr(str, match_str) != NULL)
522 			return index;
523 		if (flag == FIND_NEXT_MATCH_UP ||
524 		    flag == MATCH_TINKER_PATTERN_UP)
525 			--index;
526 		else
527 			++index;
528 		index = (index + items_num) % items_num;
529 		if (index == match_start)
530 			return -1;
531 	}
532 }
533 
534 /* Make a new item. */
535 static void item_make(struct menu *menu, char tag, const char *fmt, ...)
536 {
537 	va_list ap;
538 
539 	if (items_num > MAX_MENU_ITEMS-1)
540 		return;
541 
542 	bzero(&k_menu_items[items_num], sizeof(k_menu_items[0]));
543 	k_menu_items[items_num].tag = tag;
544 	k_menu_items[items_num].usrptr = menu;
545 	if (menu != NULL)
546 		k_menu_items[items_num].is_visible =
547 			menu_is_visible(menu);
548 	else
549 		k_menu_items[items_num].is_visible = 1;
550 
551 	va_start(ap, fmt);
552 	vsnprintf(k_menu_items[items_num].str,
553 		  sizeof(k_menu_items[items_num].str),
554 		  fmt, ap);
555 	va_end(ap);
556 
557 	if (!k_menu_items[items_num].is_visible)
558 		memcpy(k_menu_items[items_num].str, "XXX", 3);
559 
560 	curses_menu_items[items_num] = new_item(
561 			k_menu_items[items_num].str,
562 			k_menu_items[items_num].str);
563 	set_item_userptr(curses_menu_items[items_num],
564 			&k_menu_items[items_num]);
565 	/*
566 	if (!k_menu_items[items_num].is_visible)
567 		item_opts_off(curses_menu_items[items_num], O_SELECTABLE);
568 	*/
569 
570 	items_num++;
571 	curses_menu_items[items_num] = NULL;
572 }
573 
574 /* very hackish. adds a string to the last item added */
575 static void item_add_str(const char *fmt, ...)
576 {
577 	va_list ap;
578 	int index = items_num-1;
579 	char new_str[256];
580 	char tmp_str[256];
581 
582 	if (index < 0)
583 		return;
584 
585 	va_start(ap, fmt);
586 	vsnprintf(new_str, sizeof(new_str), fmt, ap);
587 	va_end(ap);
588 	snprintf(tmp_str, sizeof(tmp_str), "%s%s",
589 			k_menu_items[index].str, new_str);
590 	strncpy(k_menu_items[index].str,
591 		tmp_str,
592 		sizeof(k_menu_items[index].str));
593 
594 	free_item(curses_menu_items[index]);
595 	curses_menu_items[index] = new_item(
596 			k_menu_items[index].str,
597 			k_menu_items[index].str);
598 	set_item_userptr(curses_menu_items[index],
599 			&k_menu_items[index]);
600 }
601 
602 /* get the tag of the currently selected item */
603 static char item_tag(void)
604 {
605 	ITEM *cur;
606 	struct mitem *mcur;
607 
608 	cur = current_item(curses_menu);
609 	if (cur == NULL)
610 		return 0;
611 	mcur = (struct mitem *) item_userptr(cur);
612 	return mcur->tag;
613 }
614 
615 static int curses_item_index(void)
616 {
617 	return  item_index(current_item(curses_menu));
618 }
619 
620 static void *item_data(void)
621 {
622 	ITEM *cur;
623 	struct mitem *mcur;
624 
625 	cur = current_item(curses_menu);
626 	if (!cur)
627 		return NULL;
628 	mcur = (struct mitem *) item_userptr(cur);
629 	return mcur->usrptr;
630 
631 }
632 
633 static int item_is_tag(char tag)
634 {
635 	return item_tag() == tag;
636 }
637 
638 static char filename[PATH_MAX+1];
639 static char menu_backtitle[PATH_MAX+128];
640 static void set_config_filename(const char *config_filename)
641 {
642 	snprintf(menu_backtitle, sizeof(menu_backtitle), "%s - %s",
643 		 config_filename, rootmenu.prompt->text);
644 
645 	snprintf(filename, sizeof(filename), "%s", config_filename);
646 }
647 
648 /* return = 0 means we are successful.
649  * -1 means go on doing what you were doing
650  */
651 static int do_exit(void)
652 {
653 	int res;
654 	if (!conf_get_changed()) {
655 		global_exit = 1;
656 		return 0;
657 	}
658 	res = btn_dialog(main_window,
659 			"Do you wish to save your new configuration?\n"
660 				"<ESC> to cancel and resume nconfig.",
661 			2,
662 			"   <save>   ",
663 			"<don't save>");
664 	if (res == KEY_EXIT) {
665 		global_exit = 0;
666 		return -1;
667 	}
668 
669 	/* if we got here, the user really wants to exit */
670 	switch (res) {
671 	case 0:
672 		res = conf_write(filename);
673 		if (res)
674 			btn_dialog(
675 				main_window,
676 				"Error during writing of configuration.\n"
677 				  "Your configuration changes were NOT saved.",
678 				  1,
679 				  "<OK>");
680 		conf_write_autoconf(0);
681 		break;
682 	default:
683 		btn_dialog(
684 			main_window,
685 			"Your configuration changes were NOT saved.",
686 			1,
687 			"<OK>");
688 		break;
689 	}
690 	global_exit = 1;
691 	return 0;
692 }
693 
694 struct search_data {
695 	struct list_head *head;
696 	struct menu *target;
697 };
698 
699 static int next_jump_key(int key)
700 {
701 	if (key < '1' || key > '9')
702 		return '1';
703 
704 	key++;
705 
706 	if (key > '9')
707 		key = '1';
708 
709 	return key;
710 }
711 
712 static int handle_search_keys(int key, size_t start, size_t end, void *_data)
713 {
714 	struct search_data *data = _data;
715 	struct jump_key *pos;
716 	int index = 0;
717 
718 	if (key < '1' || key > '9')
719 		return 0;
720 
721 	list_for_each_entry(pos, data->head, entries) {
722 		index = next_jump_key(index);
723 
724 		if (pos->offset < start)
725 			continue;
726 
727 		if (pos->offset >= end)
728 			break;
729 
730 		if (key == index) {
731 			data->target = pos->target;
732 			return 1;
733 		}
734 	}
735 
736 	return 0;
737 }
738 
739 int get_jump_key_char(void)
740 {
741 	jump_key_char = next_jump_key(jump_key_char);
742 
743 	return jump_key_char;
744 }
745 
746 static void search_conf(void)
747 {
748 	struct symbol **sym_arr;
749 	struct gstr res;
750 	struct gstr title;
751 	char *dialog_input;
752 	int dres, vscroll = 0, hscroll = 0;
753 	bool again;
754 
755 	title = str_new();
756 	str_printf( &title, "Enter (sub)string or regexp to search for "
757 			      "(with or without \"%s\")", CONFIG_);
758 
759 again:
760 	dres = dialog_inputbox(main_window,
761 			"Search Configuration Parameter",
762 			str_get(&title),
763 			"", &dialog_input_result, &dialog_input_result_len);
764 	switch (dres) {
765 	case 0:
766 		break;
767 	case 1:
768 		show_scroll_win(main_window,
769 				"Search Configuration", search_help);
770 		goto again;
771 	default:
772 		str_free(&title);
773 		return;
774 	}
775 
776 	/* strip the prefix if necessary */
777 	dialog_input = dialog_input_result;
778 	if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
779 		dialog_input += strlen(CONFIG_);
780 
781 	sym_arr = sym_re_search(dialog_input);
782 
783 	do {
784 		LIST_HEAD(head);
785 		struct search_data data = {
786 			.head = &head,
787 			.target = NULL,
788 		};
789 		jump_key_char = 0;
790 		res = get_relations_str(sym_arr, &head);
791 		dres = show_scroll_win_ext(main_window,
792 				"Search Results", str_get(&res),
793 				&vscroll, &hscroll,
794 				handle_search_keys, &data);
795 		again = false;
796 		if (dres >= '1' && dres <= '9') {
797 			assert(data.target != NULL);
798 			selected_conf(data.target->parent, data.target);
799 			again = true;
800 		}
801 		str_free(&res);
802 	} while (again);
803 	free(sym_arr);
804 	str_free(&title);
805 }
806 
807 
808 static void build_conf(struct menu *menu)
809 {
810 	struct symbol *sym;
811 	struct property *prop;
812 	struct menu *child;
813 	int type, tmp, doint = 2;
814 	tristate val;
815 	char ch;
816 
817 	if (!menu || (!show_all_items && !menu_is_visible(menu)))
818 		return;
819 
820 	sym = menu->sym;
821 	prop = menu->prompt;
822 	if (!sym) {
823 		if (prop && menu != current_menu) {
824 			const char *prompt = menu_get_prompt(menu);
825 			enum prop_type ptype;
826 			ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
827 			switch (ptype) {
828 			case P_MENU:
829 				child_count++;
830 				if (single_menu_mode) {
831 					item_make(menu, 'm',
832 						"%s%*c%s",
833 						menu->data ? "-->" : "++>",
834 						indent + 1, ' ', prompt);
835 				} else
836 					item_make(menu, 'm',
837 						  "   %*c%s  %s",
838 						  indent + 1, ' ', prompt,
839 						  menu_is_empty(menu) ? "----" : "--->");
840 
841 				if (single_menu_mode && menu->data)
842 					goto conf_childs;
843 				return;
844 			case P_COMMENT:
845 				if (prompt) {
846 					child_count++;
847 					item_make(menu, ':',
848 						"   %*c*** %s ***",
849 						indent + 1, ' ',
850 						prompt);
851 				}
852 				break;
853 			default:
854 				if (prompt) {
855 					child_count++;
856 					item_make(menu, ':', "---%*c%s",
857 						indent + 1, ' ',
858 						prompt);
859 				}
860 			}
861 		} else
862 			doint = 0;
863 		goto conf_childs;
864 	}
865 
866 	type = sym_get_type(sym);
867 	if (sym_is_choice(sym)) {
868 		struct symbol *def_sym = sym_get_choice_value(sym);
869 		struct menu *def_menu = NULL;
870 
871 		child_count++;
872 		for (child = menu->list; child; child = child->next) {
873 			if (menu_is_visible(child) && child->sym == def_sym)
874 				def_menu = child;
875 		}
876 
877 		val = sym_get_tristate_value(sym);
878 		if (sym_is_changeable(sym)) {
879 			switch (type) {
880 			case S_BOOLEAN:
881 				item_make(menu, 't', "[%c]",
882 						val == no ? ' ' : '*');
883 				break;
884 			case S_TRISTATE:
885 				switch (val) {
886 				case yes:
887 					ch = '*';
888 					break;
889 				case mod:
890 					ch = 'M';
891 					break;
892 				default:
893 					ch = ' ';
894 					break;
895 				}
896 				item_make(menu, 't', "<%c>", ch);
897 				break;
898 			}
899 		} else {
900 			item_make(menu, def_menu ? 't' : ':', "   ");
901 		}
902 
903 		item_add_str("%*c%s", indent + 1,
904 				' ', menu_get_prompt(menu));
905 		if (val == yes) {
906 			if (def_menu) {
907 				item_add_str(" (%s)",
908 					menu_get_prompt(def_menu));
909 				item_add_str("  --->");
910 				if (def_menu->list) {
911 					indent += 2;
912 					build_conf(def_menu);
913 					indent -= 2;
914 				}
915 			}
916 			return;
917 		}
918 	} else {
919 		if (menu == current_menu) {
920 			item_make(menu, ':',
921 				"---%*c%s", indent + 1,
922 				' ', menu_get_prompt(menu));
923 			goto conf_childs;
924 		}
925 		child_count++;
926 		val = sym_get_tristate_value(sym);
927 		if (sym_is_choice_value(sym) && val == yes) {
928 			item_make(menu, ':', "   ");
929 		} else {
930 			switch (type) {
931 			case S_BOOLEAN:
932 				if (sym_is_changeable(sym))
933 					item_make(menu, 't', "[%c]",
934 						val == no ? ' ' : '*');
935 				else
936 					item_make(menu, 't', "-%c-",
937 						val == no ? ' ' : '*');
938 				break;
939 			case S_TRISTATE:
940 				switch (val) {
941 				case yes:
942 					ch = '*';
943 					break;
944 				case mod:
945 					ch = 'M';
946 					break;
947 				default:
948 					ch = ' ';
949 					break;
950 				}
951 				if (sym_is_changeable(sym)) {
952 					if (sym->rev_dep.tri == mod)
953 						item_make(menu,
954 							't', "{%c}", ch);
955 					else
956 						item_make(menu,
957 							't', "<%c>", ch);
958 				} else
959 					item_make(menu, 't', "-%c-", ch);
960 				break;
961 			default:
962 				tmp = 2 + strlen(sym_get_string_value(sym));
963 				item_make(menu, 's', "    (%s)",
964 						sym_get_string_value(sym));
965 				tmp = indent - tmp + 4;
966 				if (tmp < 0)
967 					tmp = 0;
968 				item_add_str("%*c%s%s", tmp, ' ',
969 						menu_get_prompt(menu),
970 						(sym_has_value(sym) ||
971 						 !sym_is_changeable(sym)) ? "" :
972 						" (NEW)");
973 				goto conf_childs;
974 			}
975 		}
976 		item_add_str("%*c%s%s", indent + 1, ' ',
977 				menu_get_prompt(menu),
978 				(sym_has_value(sym) || !sym_is_changeable(sym)) ?
979 				"" : " (NEW)");
980 		if (menu->prompt && menu->prompt->type == P_MENU) {
981 			item_add_str("  %s", menu_is_empty(menu) ? "----" : "--->");
982 			return;
983 		}
984 	}
985 
986 conf_childs:
987 	indent += doint;
988 	for (child = menu->list; child; child = child->next)
989 		build_conf(child);
990 	indent -= doint;
991 }
992 
993 static void reset_menu(void)
994 {
995 	unpost_menu(curses_menu);
996 	clean_items();
997 }
998 
999 /* adjust the menu to show this item.
1000  * prefer not to scroll the menu if possible*/
1001 static void center_item(int selected_index, int *last_top_row)
1002 {
1003 	int toprow;
1004 
1005 	set_top_row(curses_menu, *last_top_row);
1006 	toprow = top_row(curses_menu);
1007 	if (selected_index < toprow ||
1008 	    selected_index >= toprow+mwin_max_lines) {
1009 		toprow = max(selected_index-mwin_max_lines/2, 0);
1010 		if (toprow >= item_count(curses_menu)-mwin_max_lines)
1011 			toprow = item_count(curses_menu)-mwin_max_lines;
1012 		set_top_row(curses_menu, toprow);
1013 	}
1014 	set_current_item(curses_menu,
1015 			curses_menu_items[selected_index]);
1016 	*last_top_row = toprow;
1017 	post_menu(curses_menu);
1018 	refresh_all_windows(main_window);
1019 }
1020 
1021 /* this function assumes reset_menu has been called before */
1022 static void show_menu(const char *prompt, const char *instructions,
1023 		int selected_index, int *last_top_row)
1024 {
1025 	int maxx, maxy;
1026 	WINDOW *menu_window;
1027 
1028 	current_instructions = instructions;
1029 
1030 	clear();
1031 	print_in_middle(stdscr, 1, getmaxx(stdscr),
1032 			menu_backtitle,
1033 			attr_main_heading);
1034 
1035 	wattrset(main_window, attr_main_menu_box);
1036 	box(main_window, 0, 0);
1037 	wattrset(main_window, attr_main_menu_heading);
1038 	mvwprintw(main_window, 0, 3, " %s ", prompt);
1039 	wattrset(main_window, attr_normal);
1040 
1041 	set_menu_items(curses_menu, curses_menu_items);
1042 
1043 	/* position the menu at the middle of the screen */
1044 	scale_menu(curses_menu, &maxy, &maxx);
1045 	maxx = min(maxx, mwin_max_cols-2);
1046 	maxy = mwin_max_lines;
1047 	menu_window = derwin(main_window,
1048 			maxy,
1049 			maxx,
1050 			2,
1051 			(mwin_max_cols-maxx)/2);
1052 	keypad(menu_window, TRUE);
1053 	set_menu_win(curses_menu, menu_window);
1054 	set_menu_sub(curses_menu, menu_window);
1055 
1056 	/* must reassert this after changing items, otherwise returns to a
1057 	 * default of 16
1058 	 */
1059 	set_menu_format(curses_menu, maxy, 1);
1060 	center_item(selected_index, last_top_row);
1061 	set_menu_format(curses_menu, maxy, 1);
1062 
1063 	print_function_line();
1064 
1065 	/* Post the menu */
1066 	post_menu(curses_menu);
1067 	refresh_all_windows(main_window);
1068 }
1069 
1070 static void adj_match_dir(match_f *match_direction)
1071 {
1072 	if (*match_direction == FIND_NEXT_MATCH_DOWN)
1073 		*match_direction =
1074 			MATCH_TINKER_PATTERN_DOWN;
1075 	else if (*match_direction == FIND_NEXT_MATCH_UP)
1076 		*match_direction =
1077 			MATCH_TINKER_PATTERN_UP;
1078 	/* else, do no change.. */
1079 }
1080 
1081 struct match_state
1082 {
1083 	int in_search;
1084 	match_f match_direction;
1085 	char pattern[256];
1086 };
1087 
1088 /* Return 0 means I have handled the key. In such a case, ans should hold the
1089  * item to center, or -1 otherwise.
1090  * Else return -1 .
1091  */
1092 static int do_match(int key, struct match_state *state, int *ans)
1093 {
1094 	char c = (char) key;
1095 	int terminate_search = 0;
1096 	*ans = -1;
1097 	if (key == '/' || (state->in_search && key == 27)) {
1098 		move(0, 0);
1099 		refresh();
1100 		clrtoeol();
1101 		state->in_search = 1-state->in_search;
1102 		bzero(state->pattern, sizeof(state->pattern));
1103 		state->match_direction = MATCH_TINKER_PATTERN_DOWN;
1104 		return 0;
1105 	} else if (!state->in_search)
1106 		return 1;
1107 
1108 	if (isalnum(c) || isgraph(c) || c == ' ') {
1109 		state->pattern[strlen(state->pattern)] = c;
1110 		state->pattern[strlen(state->pattern)] = '\0';
1111 		adj_match_dir(&state->match_direction);
1112 		*ans = get_mext_match(state->pattern,
1113 				state->match_direction);
1114 	} else if (key == KEY_DOWN) {
1115 		state->match_direction = FIND_NEXT_MATCH_DOWN;
1116 		*ans = get_mext_match(state->pattern,
1117 				state->match_direction);
1118 	} else if (key == KEY_UP) {
1119 		state->match_direction = FIND_NEXT_MATCH_UP;
1120 		*ans = get_mext_match(state->pattern,
1121 				state->match_direction);
1122 	} else if (key == KEY_BACKSPACE || key == 8 || key == 127) {
1123 		state->pattern[strlen(state->pattern)-1] = '\0';
1124 		adj_match_dir(&state->match_direction);
1125 	} else
1126 		terminate_search = 1;
1127 
1128 	if (terminate_search) {
1129 		state->in_search = 0;
1130 		bzero(state->pattern, sizeof(state->pattern));
1131 		move(0, 0);
1132 		refresh();
1133 		clrtoeol();
1134 		return -1;
1135 	}
1136 	return 0;
1137 }
1138 
1139 static void conf(struct menu *menu)
1140 {
1141 	selected_conf(menu, NULL);
1142 }
1143 
1144 static void selected_conf(struct menu *menu, struct menu *active_menu)
1145 {
1146 	struct menu *submenu = NULL;
1147 	struct symbol *sym;
1148 	int i, res;
1149 	int current_index = 0;
1150 	int last_top_row = 0;
1151 	struct match_state match_state = {
1152 		.in_search = 0,
1153 		.match_direction = MATCH_TINKER_PATTERN_DOWN,
1154 		.pattern = "",
1155 	};
1156 
1157 	while (!global_exit) {
1158 		reset_menu();
1159 		current_menu = menu;
1160 		build_conf(menu);
1161 		if (!child_count)
1162 			break;
1163 
1164 		if (active_menu != NULL) {
1165 			for (i = 0; i < items_num; i++) {
1166 				struct mitem *mcur;
1167 
1168 				mcur = (struct mitem *) item_userptr(curses_menu_items[i]);
1169 				if ((struct menu *) mcur->usrptr == active_menu) {
1170 					current_index = i;
1171 					break;
1172 				}
1173 			}
1174 			active_menu = NULL;
1175 		}
1176 
1177 		show_menu(menu_get_prompt(menu), menu_instructions,
1178 			  current_index, &last_top_row);
1179 		keypad((menu_win(curses_menu)), TRUE);
1180 		while (!global_exit) {
1181 			if (match_state.in_search) {
1182 				mvprintw(0, 0,
1183 					"searching: %s", match_state.pattern);
1184 				clrtoeol();
1185 			}
1186 			refresh_all_windows(main_window);
1187 			res = wgetch(menu_win(curses_menu));
1188 			if (!res)
1189 				break;
1190 			if (do_match(res, &match_state, &current_index) == 0) {
1191 				if (current_index != -1)
1192 					center_item(current_index,
1193 						    &last_top_row);
1194 				continue;
1195 			}
1196 			if (process_special_keys(&res,
1197 						(struct menu *) item_data()))
1198 				break;
1199 			switch (res) {
1200 			case KEY_DOWN:
1201 			case 'j':
1202 				menu_driver(curses_menu, REQ_DOWN_ITEM);
1203 				break;
1204 			case KEY_UP:
1205 			case 'k':
1206 				menu_driver(curses_menu, REQ_UP_ITEM);
1207 				break;
1208 			case KEY_NPAGE:
1209 				menu_driver(curses_menu, REQ_SCR_DPAGE);
1210 				break;
1211 			case KEY_PPAGE:
1212 				menu_driver(curses_menu, REQ_SCR_UPAGE);
1213 				break;
1214 			case KEY_HOME:
1215 				menu_driver(curses_menu, REQ_FIRST_ITEM);
1216 				break;
1217 			case KEY_END:
1218 				menu_driver(curses_menu, REQ_LAST_ITEM);
1219 				break;
1220 			case 'h':
1221 			case '?':
1222 				show_help((struct menu *) item_data());
1223 				break;
1224 			}
1225 			if (res == 10 || res == 27 ||
1226 				res == 32 || res == 'n' || res == 'y' ||
1227 				res == KEY_LEFT || res == KEY_RIGHT ||
1228 				res == 'm')
1229 				break;
1230 			refresh_all_windows(main_window);
1231 		}
1232 
1233 		refresh_all_windows(main_window);
1234 		/* if ESC or left*/
1235 		if (res == 27 || (menu != &rootmenu && res == KEY_LEFT))
1236 			break;
1237 
1238 		/* remember location in the menu */
1239 		last_top_row = top_row(curses_menu);
1240 		current_index = curses_item_index();
1241 
1242 		if (!item_tag())
1243 			continue;
1244 
1245 		submenu = (struct menu *) item_data();
1246 		if (!submenu || !menu_is_visible(submenu))
1247 			continue;
1248 		sym = submenu->sym;
1249 
1250 		switch (res) {
1251 		case ' ':
1252 			if (item_is_tag('t'))
1253 				sym_toggle_tristate_value(sym);
1254 			else if (item_is_tag('m'))
1255 				conf(submenu);
1256 			break;
1257 		case KEY_RIGHT:
1258 		case 10: /* ENTER WAS PRESSED */
1259 			switch (item_tag()) {
1260 			case 'm':
1261 				if (single_menu_mode)
1262 					submenu->data =
1263 						(void *) (long) !submenu->data;
1264 				else
1265 					conf(submenu);
1266 				break;
1267 			case 't':
1268 				if (sym_is_choice(sym) &&
1269 				    sym_get_tristate_value(sym) == yes)
1270 					conf_choice(submenu);
1271 				else if (submenu->prompt &&
1272 					 submenu->prompt->type == P_MENU)
1273 					conf(submenu);
1274 				else if (res == 10)
1275 					sym_toggle_tristate_value(sym);
1276 				break;
1277 			case 's':
1278 				conf_string(submenu);
1279 				break;
1280 			}
1281 			break;
1282 		case 'y':
1283 			if (item_is_tag('t')) {
1284 				if (sym_set_tristate_value(sym, yes))
1285 					break;
1286 				if (sym_set_tristate_value(sym, mod))
1287 					btn_dialog(main_window, setmod_text, 0);
1288 			}
1289 			break;
1290 		case 'n':
1291 			if (item_is_tag('t'))
1292 				sym_set_tristate_value(sym, no);
1293 			break;
1294 		case 'm':
1295 			if (item_is_tag('t'))
1296 				sym_set_tristate_value(sym, mod);
1297 			break;
1298 		}
1299 	}
1300 }
1301 
1302 static void conf_message_callback(const char *s)
1303 {
1304 	btn_dialog(main_window, s, 1, "<OK>");
1305 }
1306 
1307 static void show_help(struct menu *menu)
1308 {
1309 	struct gstr help;
1310 
1311 	if (!menu)
1312 		return;
1313 
1314 	help = str_new();
1315 	menu_get_ext_help(menu, &help);
1316 	show_scroll_win(main_window, menu_get_prompt(menu), str_get(&help));
1317 	str_free(&help);
1318 }
1319 
1320 static void conf_choice(struct menu *menu)
1321 {
1322 	const char *prompt = menu_get_prompt(menu);
1323 	struct menu *child = NULL;
1324 	struct symbol *active;
1325 	int selected_index = 0;
1326 	int last_top_row = 0;
1327 	int res, i = 0;
1328 	struct match_state match_state = {
1329 		.in_search = 0,
1330 		.match_direction = MATCH_TINKER_PATTERN_DOWN,
1331 		.pattern = "",
1332 	};
1333 
1334 	active = sym_get_choice_value(menu->sym);
1335 	/* this is mostly duplicated from the conf() function. */
1336 	while (!global_exit) {
1337 		reset_menu();
1338 
1339 		for (i = 0, child = menu->list; child; child = child->next) {
1340 			if (!show_all_items && !menu_is_visible(child))
1341 				continue;
1342 
1343 			if (child->sym == sym_get_choice_value(menu->sym))
1344 				item_make(child, ':', "<X> %s",
1345 						menu_get_prompt(child));
1346 			else if (child->sym)
1347 				item_make(child, ':', "    %s",
1348 						menu_get_prompt(child));
1349 			else
1350 				item_make(child, ':', "*** %s ***",
1351 						menu_get_prompt(child));
1352 
1353 			if (child->sym == active){
1354 				last_top_row = top_row(curses_menu);
1355 				selected_index = i;
1356 			}
1357 			i++;
1358 		}
1359 		show_menu(prompt ? prompt : "Choice Menu",
1360 				radiolist_instructions,
1361 				selected_index,
1362 				&last_top_row);
1363 		while (!global_exit) {
1364 			if (match_state.in_search) {
1365 				mvprintw(0, 0, "searching: %s",
1366 					 match_state.pattern);
1367 				clrtoeol();
1368 			}
1369 			refresh_all_windows(main_window);
1370 			res = wgetch(menu_win(curses_menu));
1371 			if (!res)
1372 				break;
1373 			if (do_match(res, &match_state, &selected_index) == 0) {
1374 				if (selected_index != -1)
1375 					center_item(selected_index,
1376 						    &last_top_row);
1377 				continue;
1378 			}
1379 			if (process_special_keys(
1380 						&res,
1381 						(struct menu *) item_data()))
1382 				break;
1383 			switch (res) {
1384 			case KEY_DOWN:
1385 			case 'j':
1386 				menu_driver(curses_menu, REQ_DOWN_ITEM);
1387 				break;
1388 			case KEY_UP:
1389 			case 'k':
1390 				menu_driver(curses_menu, REQ_UP_ITEM);
1391 				break;
1392 			case KEY_NPAGE:
1393 				menu_driver(curses_menu, REQ_SCR_DPAGE);
1394 				break;
1395 			case KEY_PPAGE:
1396 				menu_driver(curses_menu, REQ_SCR_UPAGE);
1397 				break;
1398 			case KEY_HOME:
1399 				menu_driver(curses_menu, REQ_FIRST_ITEM);
1400 				break;
1401 			case KEY_END:
1402 				menu_driver(curses_menu, REQ_LAST_ITEM);
1403 				break;
1404 			case 'h':
1405 			case '?':
1406 				show_help((struct menu *) item_data());
1407 				break;
1408 			}
1409 			if (res == 10 || res == 27 || res == ' ' ||
1410 					res == KEY_LEFT){
1411 				break;
1412 			}
1413 			refresh_all_windows(main_window);
1414 		}
1415 		/* if ESC or left */
1416 		if (res == 27 || res == KEY_LEFT)
1417 			break;
1418 
1419 		child = item_data();
1420 		if (!child || !menu_is_visible(child) || !child->sym)
1421 			continue;
1422 		switch (res) {
1423 		case ' ':
1424 		case  10:
1425 		case KEY_RIGHT:
1426 			sym_set_tristate_value(child->sym, yes);
1427 			return;
1428 		case 'h':
1429 		case '?':
1430 			show_help(child);
1431 			active = child->sym;
1432 			break;
1433 		case KEY_EXIT:
1434 			return;
1435 		}
1436 	}
1437 }
1438 
1439 static void conf_string(struct menu *menu)
1440 {
1441 	const char *prompt = menu_get_prompt(menu);
1442 
1443 	while (1) {
1444 		int res;
1445 		const char *heading;
1446 
1447 		switch (sym_get_type(menu->sym)) {
1448 		case S_INT:
1449 			heading = inputbox_instructions_int;
1450 			break;
1451 		case S_HEX:
1452 			heading = inputbox_instructions_hex;
1453 			break;
1454 		case S_STRING:
1455 			heading = inputbox_instructions_string;
1456 			break;
1457 		default:
1458 			heading = "Internal nconf error!";
1459 		}
1460 		res = dialog_inputbox(main_window,
1461 				prompt ? prompt : "Main Menu",
1462 				heading,
1463 				sym_get_string_value(menu->sym),
1464 				&dialog_input_result,
1465 				&dialog_input_result_len);
1466 		switch (res) {
1467 		case 0:
1468 			if (sym_set_string_value(menu->sym,
1469 						dialog_input_result))
1470 				return;
1471 			btn_dialog(main_window,
1472 				"You have made an invalid entry.", 0);
1473 			break;
1474 		case 1:
1475 			show_help(menu);
1476 			break;
1477 		case KEY_EXIT:
1478 			return;
1479 		}
1480 	}
1481 }
1482 
1483 static void conf_load(void)
1484 {
1485 	while (1) {
1486 		int res;
1487 		res = dialog_inputbox(main_window,
1488 				NULL, load_config_text,
1489 				filename,
1490 				&dialog_input_result,
1491 				&dialog_input_result_len);
1492 		switch (res) {
1493 		case 0:
1494 			if (!dialog_input_result[0])
1495 				return;
1496 			if (!conf_read(dialog_input_result)) {
1497 				set_config_filename(dialog_input_result);
1498 				conf_set_changed(true);
1499 				return;
1500 			}
1501 			btn_dialog(main_window, "File does not exist!", 0);
1502 			break;
1503 		case 1:
1504 			show_scroll_win(main_window,
1505 					"Load Alternate Configuration",
1506 					load_config_help);
1507 			break;
1508 		case KEY_EXIT:
1509 			return;
1510 		}
1511 	}
1512 }
1513 
1514 static void conf_save(void)
1515 {
1516 	while (1) {
1517 		int res;
1518 		res = dialog_inputbox(main_window,
1519 				NULL, save_config_text,
1520 				filename,
1521 				&dialog_input_result,
1522 				&dialog_input_result_len);
1523 		switch (res) {
1524 		case 0:
1525 			if (!dialog_input_result[0])
1526 				return;
1527 			res = conf_write(dialog_input_result);
1528 			if (!res) {
1529 				set_config_filename(dialog_input_result);
1530 				return;
1531 			}
1532 			btn_dialog(main_window, "Can't create file!",
1533 				1, "<OK>");
1534 			break;
1535 		case 1:
1536 			show_scroll_win(main_window,
1537 				"Save Alternate Configuration",
1538 				save_config_help);
1539 			break;
1540 		case KEY_EXIT:
1541 			return;
1542 		}
1543 	}
1544 }
1545 
1546 static void setup_windows(void)
1547 {
1548 	int lines, columns;
1549 
1550 	getmaxyx(stdscr, lines, columns);
1551 
1552 	if (main_window != NULL)
1553 		delwin(main_window);
1554 
1555 	/* set up the menu and menu window */
1556 	main_window = newwin(lines-2, columns-2, 2, 1);
1557 	keypad(main_window, TRUE);
1558 	mwin_max_lines = lines-7;
1559 	mwin_max_cols = columns-6;
1560 
1561 	/* panels order is from bottom to top */
1562 	new_panel(main_window);
1563 }
1564 
1565 int main(int ac, char **av)
1566 {
1567 	int lines, columns;
1568 	char *mode;
1569 
1570 	if (ac > 1 && strcmp(av[1], "-s") == 0) {
1571 		/* Silence conf_read() until the real callback is set up */
1572 		conf_set_message_callback(NULL);
1573 		av++;
1574 	}
1575 	conf_parse(av[1]);
1576 	conf_read(NULL);
1577 
1578 	mode = getenv("NCONFIG_MODE");
1579 	if (mode) {
1580 		if (!strcasecmp(mode, "single_menu"))
1581 			single_menu_mode = 1;
1582 	}
1583 
1584 	/* Initialize curses */
1585 	initscr();
1586 	/* set color theme */
1587 	set_colors();
1588 
1589 	cbreak();
1590 	noecho();
1591 	keypad(stdscr, TRUE);
1592 	curs_set(0);
1593 
1594 	getmaxyx(stdscr, lines, columns);
1595 	if (columns < 75 || lines < 20) {
1596 		endwin();
1597 		printf("Your terminal should have at "
1598 			"least 20 lines and 75 columns\n");
1599 		return 1;
1600 	}
1601 
1602 	notimeout(stdscr, FALSE);
1603 #if NCURSES_REENTRANT
1604 	set_escdelay(1);
1605 #else
1606 	ESCDELAY = 1;
1607 #endif
1608 
1609 	/* set btns menu */
1610 	curses_menu = new_menu(curses_menu_items);
1611 	menu_opts_off(curses_menu, O_SHOWDESC);
1612 	menu_opts_on(curses_menu, O_SHOWMATCH);
1613 	menu_opts_on(curses_menu, O_ONEVALUE);
1614 	menu_opts_on(curses_menu, O_NONCYCLIC);
1615 	menu_opts_on(curses_menu, O_IGNORECASE);
1616 	set_menu_mark(curses_menu, " ");
1617 	set_menu_fore(curses_menu, attr_main_menu_fore);
1618 	set_menu_back(curses_menu, attr_main_menu_back);
1619 	set_menu_grey(curses_menu, attr_main_menu_grey);
1620 
1621 	set_config_filename(conf_get_configname());
1622 	setup_windows();
1623 
1624 	/* check for KEY_FUNC(1) */
1625 	if (has_key(KEY_F(1)) == FALSE) {
1626 		show_scroll_win(main_window,
1627 				"Instructions",
1628 				menu_no_f_instructions);
1629 	}
1630 
1631 	conf_set_message_callback(conf_message_callback);
1632 	/* do the work */
1633 	while (!global_exit) {
1634 		conf(&rootmenu);
1635 		if (!global_exit && do_exit() == 0)
1636 			break;
1637 	}
1638 	/* ok, we are done */
1639 	unpost_menu(curses_menu);
1640 	free_menu(curses_menu);
1641 	delwin(main_window);
1642 	clear();
1643 	refresh();
1644 	endwin();
1645 	return 0;
1646 }
1647