root/scripts/kconfig/mconf.c

/* [<][>][^][v][top][bottom][index][help] */

DEFINITIONS

This source file includes following definitions.
  1. set_config_filename
  2. set_subtitle
  3. reset_subtitle
  4. update_text
  5. search_conf
  6. build_conf
  7. conf
  8. show_textbox_ext
  9. show_textbox
  10. show_helptext
  11. conf_message_callback
  12. show_help
  13. conf_choice
  14. conf_string
  15. conf_load
  16. conf_save
  17. handle_exit
  18. sig_handler
  19. main

   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 <signal.h>
  19 #include <unistd.h>
  20 
  21 #include "lkc.h"
  22 #include "lxdialog/dialog.h"
  23 
  24 static const char mconf_readme[] =
  25 "Overview\n"
  26 "--------\n"
  27 "This interface lets you select features and parameters for the build.\n"
  28 "Features can either be built-in, modularized, or ignored. Parameters\n"
  29 "must be entered in as decimal or hexadecimal numbers or text.\n"
  30 "\n"
  31 "Menu items beginning with following braces represent features that\n"
  32 "  [ ] can be built in or removed\n"
  33 "  < > can be built in, modularized or removed\n"
  34 "  { } can be built in or modularized (selected by other feature)\n"
  35 "  - - are selected by other feature,\n"
  36 "while *, M or whitespace inside braces means to build in, build as\n"
  37 "a module or to exclude the feature respectively.\n"
  38 "\n"
  39 "To change any of these features, highlight it with the cursor\n"
  40 "keys and press <Y> to build it in, <M> to make it a module or\n"
  41 "<N> to remove it.  You may also press the <Space Bar> to cycle\n"
  42 "through the available options (i.e. Y->N->M->Y).\n"
  43 "\n"
  44 "Some additional keyboard hints:\n"
  45 "\n"
  46 "Menus\n"
  47 "----------\n"
  48 "o  Use the Up/Down arrow keys (cursor keys) to highlight the item you\n"
  49 "   wish to change or the submenu you wish to select and press <Enter>.\n"
  50 "   Submenus are designated by \"--->\", empty ones by \"----\".\n"
  51 "\n"
  52 "   Shortcut: Press the option's highlighted letter (hotkey).\n"
  53 "             Pressing a hotkey more than once will sequence\n"
  54 "             through all visible items which use that hotkey.\n"
  55 "\n"
  56 "   You may also use the <PAGE UP> and <PAGE DOWN> keys to scroll\n"
  57 "   unseen options into view.\n"
  58 "\n"
  59 "o  To exit a menu use the cursor keys to highlight the <Exit> button\n"
  60 "   and press <ENTER>.\n"
  61 "\n"
  62 "   Shortcut: Press <ESC><ESC> or <E> or <X> if there is no hotkey\n"
  63 "             using those letters.  You may press a single <ESC>, but\n"
  64 "             there is a delayed response which you may find annoying.\n"
  65 "\n"
  66 "   Also, the <TAB> and cursor keys will cycle between <Select>,\n"
  67 "   <Exit>, <Help>, <Save>, and <Load>.\n"
  68 "\n"
  69 "o  To get help with an item, use the cursor keys to highlight <Help>\n"
  70 "   and press <ENTER>.\n"
  71 "\n"
  72 "   Shortcut: Press <H> or <?>.\n"
  73 "\n"
  74 "o  To toggle the display of hidden options, press <Z>.\n"
  75 "\n"
  76 "\n"
  77 "Radiolists  (Choice lists)\n"
  78 "-----------\n"
  79 "o  Use the cursor keys to select the option you wish to set and press\n"
  80 "   <S> or the <SPACE BAR>.\n"
  81 "\n"
  82 "   Shortcut: Press the first letter of the option you wish to set then\n"
  83 "             press <S> or <SPACE BAR>.\n"
  84 "\n"
  85 "o  To see available help for the item, use the cursor keys to highlight\n"
  86 "   <Help> and Press <ENTER>.\n"
  87 "\n"
  88 "   Shortcut: Press <H> or <?>.\n"
  89 "\n"
  90 "   Also, the <TAB> and cursor keys will cycle between <Select> and\n"
  91 "   <Help>\n"
  92 "\n"
  93 "\n"
  94 "Data Entry\n"
  95 "-----------\n"
  96 "o  Enter the requested information and press <ENTER>\n"
  97 "   If you are entering hexadecimal values, it is not necessary to\n"
  98 "   add the '0x' prefix to the entry.\n"
  99 "\n"
 100 "o  For help, use the <TAB> or cursor keys to highlight the help option\n"
 101 "   and press <ENTER>.  You can try <TAB><H> as well.\n"
 102 "\n"
 103 "\n"
 104 "Text Box    (Help Window)\n"
 105 "--------\n"
 106 "o  Use the cursor keys to scroll up/down/left/right.  The VI editor\n"
 107 "   keys h,j,k,l function here as do <u>, <d>, <SPACE BAR> and <B> for\n"
 108 "   those who are familiar with less and lynx.\n"
 109 "\n"
 110 "o  Press <E>, <X>, <q>, <Enter> or <Esc><Esc> to exit.\n"
 111 "\n"
 112 "\n"
 113 "Alternate Configuration Files\n"
 114 "-----------------------------\n"
 115 "Menuconfig supports the use of alternate configuration files for\n"
 116 "those who, for various reasons, find it necessary to switch\n"
 117 "between different configurations.\n"
 118 "\n"
 119 "The <Save> button will let you save the current configuration to\n"
 120 "a file of your choosing.  Use the <Load> button to load a previously\n"
 121 "saved alternate configuration.\n"
 122 "\n"
 123 "Even if you don't use alternate configuration files, but you find\n"
 124 "during a Menuconfig session that you have completely messed up your\n"
 125 "settings, you may use the <Load> button to restore your previously\n"
 126 "saved settings from \".config\" without restarting Menuconfig.\n"
 127 "\n"
 128 "Other information\n"
 129 "-----------------\n"
 130 "If you use Menuconfig in an XTERM window, make sure you have your\n"
 131 "$TERM variable set to point to an xterm definition which supports\n"
 132 "color.  Otherwise, Menuconfig will look rather bad.  Menuconfig will\n"
 133 "not display correctly in an RXVT window because rxvt displays only one\n"
 134 "intensity of color, bright.\n"
 135 "\n"
 136 "Menuconfig will display larger menus on screens or xterms which are\n"
 137 "set to display more than the standard 25 row by 80 column geometry.\n"
 138 "In order for this to work, the \"stty size\" command must be able to\n"
 139 "display the screen's current row and column geometry.  I STRONGLY\n"
 140 "RECOMMEND that you make sure you do NOT have the shell variables\n"
 141 "LINES and COLUMNS exported into your environment.  Some distributions\n"
 142 "export those variables via /etc/profile.  Some ncurses programs can\n"
 143 "become confused when those variables (LINES & COLUMNS) don't reflect\n"
 144 "the true screen size.\n"
 145 "\n"
 146 "Optional personality available\n"
 147 "------------------------------\n"
 148 "If you prefer to have all of the options listed in a single menu,\n"
 149 "rather than the default multimenu hierarchy, run the menuconfig with\n"
 150 "MENUCONFIG_MODE environment variable set to single_menu. Example:\n"
 151 "\n"
 152 "make MENUCONFIG_MODE=single_menu menuconfig\n"
 153 "\n"
 154 "<Enter> will then unroll the appropriate category, or enfold it if it\n"
 155 "is already unrolled.\n"
 156 "\n"
 157 "Note that this mode can eventually be a little more CPU expensive\n"
 158 "(especially with a larger number of unrolled categories) than the\n"
 159 "default mode.\n"
 160 "\n"
 161 "Different color themes available\n"
 162 "--------------------------------\n"
 163 "It is possible to select different color themes using the variable\n"
 164 "MENUCONFIG_COLOR. To select a theme use:\n"
 165 "\n"
 166 "make MENUCONFIG_COLOR=<theme> menuconfig\n"
 167 "\n"
 168 "Available themes are\n"
 169 " mono       => selects colors suitable for monochrome displays\n"
 170 " blackbg    => selects a color scheme with black background\n"
 171 " classic    => theme with blue background. The classic look\n"
 172 " bluetitle  => an LCD friendly version of classic. (default)\n"
 173 "\n",
 174 menu_instructions[] =
 175         "Arrow keys navigate the menu.  "
 176         "<Enter> selects submenus ---> (or empty submenus ----).  "
 177         "Highlighted letters are hotkeys.  "
 178         "Pressing <Y> includes, <N> excludes, <M> modularizes features.  "
 179         "Press <Esc><Esc> to exit, <?> for Help, </> for Search.  "
 180         "Legend: [*] built-in  [ ] excluded  <M> module  < > module capable",
 181 radiolist_instructions[] =
 182         "Use the arrow keys to navigate this window or "
 183         "press the hotkey of the item you wish to select "
 184         "followed by the <SPACE BAR>. "
 185         "Press <?> for additional information about this option.",
 186 inputbox_instructions_int[] =
 187         "Please enter a decimal value. "
 188         "Fractions will not be accepted.  "
 189         "Use the <TAB> key to move from the input field to the buttons below it.",
 190 inputbox_instructions_hex[] =
 191         "Please enter a hexadecimal value. "
 192         "Use the <TAB> key to move from the input field to the buttons below it.",
 193 inputbox_instructions_string[] =
 194         "Please enter a string value. "
 195         "Use the <TAB> key to move from the input field to the buttons below it.",
 196 setmod_text[] =
 197         "This feature depends on another which has been configured as a module.\n"
 198         "As a result, this feature will be built as a module.",
 199 load_config_text[] =
 200         "Enter the name of the configuration file you wish to load.  "
 201         "Accept the name shown to restore the configuration you "
 202         "last retrieved.  Leave blank to abort.",
 203 load_config_help[] =
 204         "\n"
 205         "For various reasons, one may wish to keep several different\n"
 206         "configurations available on a single machine.\n"
 207         "\n"
 208         "If you have saved a previous configuration in a file other than the\n"
 209         "default one, entering its name here will allow you to modify that\n"
 210         "configuration.\n"
 211         "\n"
 212         "If you are uncertain, then you have probably never used alternate\n"
 213         "configuration files. You should therefore leave this blank to abort.\n",
 214 save_config_text[] =
 215         "Enter a filename to which this configuration should be saved "
 216         "as an alternate.  Leave blank to abort.",
 217 save_config_help[] =
 218         "\n"
 219         "For various reasons, one may wish to keep different configurations\n"
 220         "available on a single machine.\n"
 221         "\n"
 222         "Entering a file name here will allow you to later retrieve, modify\n"
 223         "and use the current configuration as an alternate to whatever\n"
 224         "configuration options you have selected at that time.\n"
 225         "\n"
 226         "If you are uncertain what all this means then you should probably\n"
 227         "leave this blank.\n",
 228 search_help[] =
 229         "\n"
 230         "Search for symbols and display their relations.\n"
 231         "Regular expressions are allowed.\n"
 232         "Example: search for \"^FOO\"\n"
 233         "Result:\n"
 234         "-----------------------------------------------------------------\n"
 235         "Symbol: FOO [=m]\n"
 236         "Type  : tristate\n"
 237         "Prompt: Foo bus is used to drive the bar HW\n"
 238         "  Location:\n"
 239         "    -> Bus options (PCI, PCMCIA, EISA, ISA)\n"
 240         "      -> PCI support (PCI [=y])\n"
 241         "(1)     -> PCI access mode (<choice> [=y])\n"
 242         "  Defined at drivers/pci/Kconfig:47\n"
 243         "  Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
 244         "  Selects: LIBCRC32\n"
 245         "  Selected by: BAR [=n]\n"
 246         "-----------------------------------------------------------------\n"
 247         "o The line 'Type:' shows the type of the configuration option for\n"
 248         "  this symbol (bool, tristate, string, ...)\n"
 249         "o The line 'Prompt:' shows the text used in the menu structure for\n"
 250         "  this symbol\n"
 251         "o The 'Defined at' line tells at what file / line number the symbol\n"
 252         "  is defined\n"
 253         "o The 'Depends on:' line tells what symbols need to be defined for\n"
 254         "  this symbol to be visible in the menu (selectable)\n"
 255         "o The 'Location:' lines tells where in the menu structure this symbol\n"
 256         "  is located\n"
 257         "    A location followed by a [=y] indicates that this is a\n"
 258         "    selectable menu item - and the current value is displayed inside\n"
 259         "    brackets.\n"
 260         "    Press the key in the (#) prefix to jump directly to that\n"
 261         "    location. You will be returned to the current search results\n"
 262         "    after exiting this new menu.\n"
 263         "o The 'Selects:' line tells what symbols will be automatically\n"
 264         "  selected if this symbol is selected (y or m)\n"
 265         "o The 'Selected by' line tells what symbol has selected this symbol\n"
 266         "\n"
 267         "Only relevant lines are shown.\n"
 268         "\n\n"
 269         "Search examples:\n"
 270         "Examples: USB  => find all symbols containing USB\n"
 271         "          ^USB => find all symbols starting with USB\n"
 272         "          USB$ => find all symbols ending with USB\n"
 273         "\n";
 274 
 275 static int indent;
 276 static struct menu *current_menu;
 277 static int child_count;
 278 static int single_menu_mode;
 279 static int show_all_options;
 280 static int save_and_exit;
 281 static int silent;
 282 
 283 static void conf(struct menu *menu, struct menu *active_menu);
 284 static void conf_choice(struct menu *menu);
 285 static void conf_string(struct menu *menu);
 286 static void conf_load(void);
 287 static void conf_save(void);
 288 static int show_textbox_ext(const char *title, char *text, int r, int c,
 289                             int *keys, int *vscroll, int *hscroll,
 290                             update_text_fn update_text, void *data);
 291 static void show_textbox(const char *title, const char *text, int r, int c);
 292 static void show_helptext(const char *title, const char *text);
 293 static void show_help(struct menu *menu);
 294 
 295 static char filename[PATH_MAX+1];
 296 static void set_config_filename(const char *config_filename)
 297 {
 298         static char menu_backtitle[PATH_MAX+128];
 299         int size;
 300 
 301         size = snprintf(menu_backtitle, sizeof(menu_backtitle),
 302                         "%s - %s", config_filename, rootmenu.prompt->text);
 303         if (size >= sizeof(menu_backtitle))
 304                 menu_backtitle[sizeof(menu_backtitle)-1] = '\0';
 305         set_dialog_backtitle(menu_backtitle);
 306 
 307         size = snprintf(filename, sizeof(filename), "%s", config_filename);
 308         if (size >= sizeof(filename))
 309                 filename[sizeof(filename)-1] = '\0';
 310 }
 311 
 312 struct subtitle_part {
 313         struct list_head entries;
 314         const char *text;
 315 };
 316 static LIST_HEAD(trail);
 317 
 318 static struct subtitle_list *subtitles;
 319 static void set_subtitle(void)
 320 {
 321         struct subtitle_part *sp;
 322         struct subtitle_list *pos, *tmp;
 323 
 324         for (pos = subtitles; pos != NULL; pos = tmp) {
 325                 tmp = pos->next;
 326                 free(pos);
 327         }
 328 
 329         subtitles = NULL;
 330         list_for_each_entry(sp, &trail, entries) {
 331                 if (sp->text) {
 332                         if (pos) {
 333                                 pos->next = xcalloc(1, sizeof(*pos));
 334                                 pos = pos->next;
 335                         } else {
 336                                 subtitles = pos = xcalloc(1, sizeof(*pos));
 337                         }
 338                         pos->text = sp->text;
 339                 }
 340         }
 341 
 342         set_dialog_subtitles(subtitles);
 343 }
 344 
 345 static void reset_subtitle(void)
 346 {
 347         struct subtitle_list *pos, *tmp;
 348 
 349         for (pos = subtitles; pos != NULL; pos = tmp) {
 350                 tmp = pos->next;
 351                 free(pos);
 352         }
 353         subtitles = NULL;
 354         set_dialog_subtitles(subtitles);
 355 }
 356 
 357 struct search_data {
 358         struct list_head *head;
 359         struct menu **targets;
 360         int *keys;
 361 };
 362 
 363 static void update_text(char *buf, size_t start, size_t end, void *_data)
 364 {
 365         struct search_data *data = _data;
 366         struct jump_key *pos;
 367         int k = 0;
 368 
 369         list_for_each_entry(pos, data->head, entries) {
 370                 if (pos->offset >= start && pos->offset < end) {
 371                         char header[4];
 372 
 373                         if (k < JUMP_NB) {
 374                                 int key = '0' + (pos->index % JUMP_NB) + 1;
 375 
 376                                 sprintf(header, "(%c)", key);
 377                                 data->keys[k] = key;
 378                                 data->targets[k] = pos->target;
 379                                 k++;
 380                         } else {
 381                                 sprintf(header, "   ");
 382                         }
 383 
 384                         memcpy(buf + pos->offset, header, sizeof(header) - 1);
 385                 }
 386         }
 387         data->keys[k] = 0;
 388 }
 389 
 390 static void search_conf(void)
 391 {
 392         struct symbol **sym_arr;
 393         struct gstr res;
 394         struct gstr title;
 395         char *dialog_input;
 396         int dres, vscroll = 0, hscroll = 0;
 397         bool again;
 398         struct gstr sttext;
 399         struct subtitle_part stpart;
 400 
 401         title = str_new();
 402         str_printf( &title, "Enter (sub)string or regexp to search for "
 403                               "(with or without \"%s\")", CONFIG_);
 404 
 405 again:
 406         dialog_clear();
 407         dres = dialog_inputbox("Search Configuration Parameter",
 408                               str_get(&title),
 409                               10, 75, "");
 410         switch (dres) {
 411         case 0:
 412                 break;
 413         case 1:
 414                 show_helptext("Search Configuration", search_help);
 415                 goto again;
 416         default:
 417                 str_free(&title);
 418                 return;
 419         }
 420 
 421         /* strip the prefix if necessary */
 422         dialog_input = dialog_input_result;
 423         if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
 424                 dialog_input += strlen(CONFIG_);
 425 
 426         sttext = str_new();
 427         str_printf(&sttext, "Search (%s)", dialog_input_result);
 428         stpart.text = str_get(&sttext);
 429         list_add_tail(&stpart.entries, &trail);
 430 
 431         sym_arr = sym_re_search(dialog_input);
 432         do {
 433                 LIST_HEAD(head);
 434                 struct menu *targets[JUMP_NB];
 435                 int keys[JUMP_NB + 1], i;
 436                 struct search_data data = {
 437                         .head = &head,
 438                         .targets = targets,
 439                         .keys = keys,
 440                 };
 441                 struct jump_key *pos, *tmp;
 442 
 443                 res = get_relations_str(sym_arr, &head);
 444                 set_subtitle();
 445                 dres = show_textbox_ext("Search Results", (char *)
 446                                         str_get(&res), 0, 0, keys, &vscroll,
 447                                         &hscroll, &update_text, (void *)
 448                                         &data);
 449                 again = false;
 450                 for (i = 0; i < JUMP_NB && keys[i]; i++)
 451                         if (dres == keys[i]) {
 452                                 conf(targets[i]->parent, targets[i]);
 453                                 again = true;
 454                         }
 455                 str_free(&res);
 456                 list_for_each_entry_safe(pos, tmp, &head, entries)
 457                         free(pos);
 458         } while (again);
 459         free(sym_arr);
 460         str_free(&title);
 461         list_del(trail.prev);
 462         str_free(&sttext);
 463 }
 464 
 465 static void build_conf(struct menu *menu)
 466 {
 467         struct symbol *sym;
 468         struct property *prop;
 469         struct menu *child;
 470         int type, tmp, doint = 2;
 471         tristate val;
 472         char ch;
 473         bool visible;
 474 
 475         /*
 476          * note: menu_is_visible() has side effect that it will
 477          * recalc the value of the symbol.
 478          */
 479         visible = menu_is_visible(menu);
 480         if (show_all_options && !menu_has_prompt(menu))
 481                 return;
 482         else if (!show_all_options && !visible)
 483                 return;
 484 
 485         sym = menu->sym;
 486         prop = menu->prompt;
 487         if (!sym) {
 488                 if (prop && menu != current_menu) {
 489                         const char *prompt = menu_get_prompt(menu);
 490                         switch (prop->type) {
 491                         case P_MENU:
 492                                 child_count++;
 493                                 if (single_menu_mode) {
 494                                         item_make("%s%*c%s",
 495                                                   menu->data ? "-->" : "++>",
 496                                                   indent + 1, ' ', prompt);
 497                                 } else
 498                                         item_make("   %*c%s  %s",
 499                                                   indent + 1, ' ', prompt,
 500                                                   menu_is_empty(menu) ? "----" : "--->");
 501                                 item_set_tag('m');
 502                                 item_set_data(menu);
 503                                 if (single_menu_mode && menu->data)
 504                                         goto conf_childs;
 505                                 return;
 506                         case P_COMMENT:
 507                                 if (prompt) {
 508                                         child_count++;
 509                                         item_make("   %*c*** %s ***", indent + 1, ' ', prompt);
 510                                         item_set_tag(':');
 511                                         item_set_data(menu);
 512                                 }
 513                                 break;
 514                         default:
 515                                 if (prompt) {
 516                                         child_count++;
 517                                         item_make("---%*c%s", indent + 1, ' ', prompt);
 518                                         item_set_tag(':');
 519                                         item_set_data(menu);
 520                                 }
 521                         }
 522                 } else
 523                         doint = 0;
 524                 goto conf_childs;
 525         }
 526 
 527         type = sym_get_type(sym);
 528         if (sym_is_choice(sym)) {
 529                 struct symbol *def_sym = sym_get_choice_value(sym);
 530                 struct menu *def_menu = NULL;
 531 
 532                 child_count++;
 533                 for (child = menu->list; child; child = child->next) {
 534                         if (menu_is_visible(child) && child->sym == def_sym)
 535                                 def_menu = child;
 536                 }
 537 
 538                 val = sym_get_tristate_value(sym);
 539                 if (sym_is_changeable(sym)) {
 540                         switch (type) {
 541                         case S_BOOLEAN:
 542                                 item_make("[%c]", val == no ? ' ' : '*');
 543                                 break;
 544                         case S_TRISTATE:
 545                                 switch (val) {
 546                                 case yes: ch = '*'; break;
 547                                 case mod: ch = 'M'; break;
 548                                 default:  ch = ' '; break;
 549                                 }
 550                                 item_make("<%c>", ch);
 551                                 break;
 552                         }
 553                         item_set_tag('t');
 554                         item_set_data(menu);
 555                 } else {
 556                         item_make("   ");
 557                         item_set_tag(def_menu ? 't' : ':');
 558                         item_set_data(menu);
 559                 }
 560 
 561                 item_add_str("%*c%s", indent + 1, ' ', menu_get_prompt(menu));
 562                 if (val == yes) {
 563                         if (def_menu) {
 564                                 item_add_str(" (%s)", menu_get_prompt(def_menu));
 565                                 item_add_str("  --->");
 566                                 if (def_menu->list) {
 567                                         indent += 2;
 568                                         build_conf(def_menu);
 569                                         indent -= 2;
 570                                 }
 571                         }
 572                         return;
 573                 }
 574         } else {
 575                 if (menu == current_menu) {
 576                         item_make("---%*c%s", indent + 1, ' ', menu_get_prompt(menu));
 577                         item_set_tag(':');
 578                         item_set_data(menu);
 579                         goto conf_childs;
 580                 }
 581                 child_count++;
 582                 val = sym_get_tristate_value(sym);
 583                 if (sym_is_choice_value(sym) && val == yes) {
 584                         item_make("   ");
 585                         item_set_tag(':');
 586                         item_set_data(menu);
 587                 } else {
 588                         switch (type) {
 589                         case S_BOOLEAN:
 590                                 if (sym_is_changeable(sym))
 591                                         item_make("[%c]", val == no ? ' ' : '*');
 592                                 else
 593                                         item_make("-%c-", val == no ? ' ' : '*');
 594                                 item_set_tag('t');
 595                                 item_set_data(menu);
 596                                 break;
 597                         case S_TRISTATE:
 598                                 switch (val) {
 599                                 case yes: ch = '*'; break;
 600                                 case mod: ch = 'M'; break;
 601                                 default:  ch = ' '; break;
 602                                 }
 603                                 if (sym_is_changeable(sym)) {
 604                                         if (sym->rev_dep.tri == mod)
 605                                                 item_make("{%c}", ch);
 606                                         else
 607                                                 item_make("<%c>", ch);
 608                                 } else
 609                                         item_make("-%c-", ch);
 610                                 item_set_tag('t');
 611                                 item_set_data(menu);
 612                                 break;
 613                         default:
 614                                 tmp = 2 + strlen(sym_get_string_value(sym)); /* () = 2 */
 615                                 item_make("(%s)", sym_get_string_value(sym));
 616                                 tmp = indent - tmp + 4;
 617                                 if (tmp < 0)
 618                                         tmp = 0;
 619                                 item_add_str("%*c%s%s", tmp, ' ', menu_get_prompt(menu),
 620                                              (sym_has_value(sym) || !sym_is_changeable(sym)) ?
 621                                              "" : " (NEW)");
 622                                 item_set_tag('s');
 623                                 item_set_data(menu);
 624                                 goto conf_childs;
 625                         }
 626                 }
 627                 item_add_str("%*c%s%s", indent + 1, ' ', menu_get_prompt(menu),
 628                           (sym_has_value(sym) || !sym_is_changeable(sym)) ?
 629                           "" : " (NEW)");
 630                 if (menu->prompt->type == P_MENU) {
 631                         item_add_str("  %s", menu_is_empty(menu) ? "----" : "--->");
 632                         return;
 633                 }
 634         }
 635 
 636 conf_childs:
 637         indent += doint;
 638         for (child = menu->list; child; child = child->next)
 639                 build_conf(child);
 640         indent -= doint;
 641 }
 642 
 643 static void conf(struct menu *menu, struct menu *active_menu)
 644 {
 645         struct menu *submenu;
 646         const char *prompt = menu_get_prompt(menu);
 647         struct subtitle_part stpart;
 648         struct symbol *sym;
 649         int res;
 650         int s_scroll = 0;
 651 
 652         if (menu != &rootmenu)
 653                 stpart.text = menu_get_prompt(menu);
 654         else
 655                 stpart.text = NULL;
 656         list_add_tail(&stpart.entries, &trail);
 657 
 658         while (1) {
 659                 item_reset();
 660                 current_menu = menu;
 661                 build_conf(menu);
 662                 if (!child_count)
 663                         break;
 664                 set_subtitle();
 665                 dialog_clear();
 666                 res = dialog_menu(prompt ? prompt : "Main Menu",
 667                                   menu_instructions,
 668                                   active_menu, &s_scroll);
 669                 if (res == 1 || res == KEY_ESC || res == -ERRDISPLAYTOOSMALL)
 670                         break;
 671                 if (item_count() != 0) {
 672                         if (!item_activate_selected())
 673                                 continue;
 674                         if (!item_tag())
 675                                 continue;
 676                 }
 677                 submenu = item_data();
 678                 active_menu = item_data();
 679                 if (submenu)
 680                         sym = submenu->sym;
 681                 else
 682                         sym = NULL;
 683 
 684                 switch (res) {
 685                 case 0:
 686                         switch (item_tag()) {
 687                         case 'm':
 688                                 if (single_menu_mode)
 689                                         submenu->data = (void *) (long) !submenu->data;
 690                                 else
 691                                         conf(submenu, NULL);
 692                                 break;
 693                         case 't':
 694                                 if (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)
 695                                         conf_choice(submenu);
 696                                 else if (submenu->prompt->type == P_MENU)
 697                                         conf(submenu, NULL);
 698                                 break;
 699                         case 's':
 700                                 conf_string(submenu);
 701                                 break;
 702                         }
 703                         break;
 704                 case 2:
 705                         if (sym)
 706                                 show_help(submenu);
 707                         else {
 708                                 reset_subtitle();
 709                                 show_helptext("README", mconf_readme);
 710                         }
 711                         break;
 712                 case 3:
 713                         reset_subtitle();
 714                         conf_save();
 715                         break;
 716                 case 4:
 717                         reset_subtitle();
 718                         conf_load();
 719                         break;
 720                 case 5:
 721                         if (item_is_tag('t')) {
 722                                 if (sym_set_tristate_value(sym, yes))
 723                                         break;
 724                                 if (sym_set_tristate_value(sym, mod))
 725                                         show_textbox(NULL, setmod_text, 6, 74);
 726                         }
 727                         break;
 728                 case 6:
 729                         if (item_is_tag('t'))
 730                                 sym_set_tristate_value(sym, no);
 731                         break;
 732                 case 7:
 733                         if (item_is_tag('t'))
 734                                 sym_set_tristate_value(sym, mod);
 735                         break;
 736                 case 8:
 737                         if (item_is_tag('t'))
 738                                 sym_toggle_tristate_value(sym);
 739                         else if (item_is_tag('m'))
 740                                 conf(submenu, NULL);
 741                         break;
 742                 case 9:
 743                         search_conf();
 744                         break;
 745                 case 10:
 746                         show_all_options = !show_all_options;
 747                         break;
 748                 }
 749         }
 750 
 751         list_del(trail.prev);
 752 }
 753 
 754 static int show_textbox_ext(const char *title, char *text, int r, int c, int
 755                             *keys, int *vscroll, int *hscroll, update_text_fn
 756                             update_text, void *data)
 757 {
 758         dialog_clear();
 759         return dialog_textbox(title, text, r, c, keys, vscroll, hscroll,
 760                               update_text, data);
 761 }
 762 
 763 static void show_textbox(const char *title, const char *text, int r, int c)
 764 {
 765         show_textbox_ext(title, (char *) text, r, c, (int []) {0}, NULL, NULL,
 766                          NULL, NULL);
 767 }
 768 
 769 static void show_helptext(const char *title, const char *text)
 770 {
 771         show_textbox(title, text, 0, 0);
 772 }
 773 
 774 static void conf_message_callback(const char *s)
 775 {
 776         if (save_and_exit) {
 777                 if (!silent)
 778                         printf("%s", s);
 779         } else {
 780                 show_textbox(NULL, s, 6, 60);
 781         }
 782 }
 783 
 784 static void show_help(struct menu *menu)
 785 {
 786         struct gstr help = str_new();
 787 
 788         help.max_width = getmaxx(stdscr) - 10;
 789         menu_get_ext_help(menu, &help);
 790 
 791         show_helptext(menu_get_prompt(menu), str_get(&help));
 792         str_free(&help);
 793 }
 794 
 795 static void conf_choice(struct menu *menu)
 796 {
 797         const char *prompt = menu_get_prompt(menu);
 798         struct menu *child;
 799         struct symbol *active;
 800 
 801         active = sym_get_choice_value(menu->sym);
 802         while (1) {
 803                 int res;
 804                 int selected;
 805                 item_reset();
 806 
 807                 current_menu = menu;
 808                 for (child = menu->list; child; child = child->next) {
 809                         if (!menu_is_visible(child))
 810                                 continue;
 811                         if (child->sym)
 812                                 item_make("%s", menu_get_prompt(child));
 813                         else {
 814                                 item_make("*** %s ***", menu_get_prompt(child));
 815                                 item_set_tag(':');
 816                         }
 817                         item_set_data(child);
 818                         if (child->sym == active)
 819                                 item_set_selected(1);
 820                         if (child->sym == sym_get_choice_value(menu->sym))
 821                                 item_set_tag('X');
 822                 }
 823                 dialog_clear();
 824                 res = dialog_checklist(prompt ? prompt : "Main Menu",
 825                                         radiolist_instructions,
 826                                         MENUBOX_HEIGTH_MIN,
 827                                         MENUBOX_WIDTH_MIN,
 828                                         CHECKLIST_HEIGTH_MIN);
 829                 selected = item_activate_selected();
 830                 switch (res) {
 831                 case 0:
 832                         if (selected) {
 833                                 child = item_data();
 834                                 if (!child->sym)
 835                                         break;
 836 
 837                                 sym_set_tristate_value(child->sym, yes);
 838                         }
 839                         return;
 840                 case 1:
 841                         if (selected) {
 842                                 child = item_data();
 843                                 show_help(child);
 844                                 active = child->sym;
 845                         } else
 846                                 show_help(menu);
 847                         break;
 848                 case KEY_ESC:
 849                         return;
 850                 case -ERRDISPLAYTOOSMALL:
 851                         return;
 852                 }
 853         }
 854 }
 855 
 856 static void conf_string(struct menu *menu)
 857 {
 858         const char *prompt = menu_get_prompt(menu);
 859 
 860         while (1) {
 861                 int res;
 862                 const char *heading;
 863 
 864                 switch (sym_get_type(menu->sym)) {
 865                 case S_INT:
 866                         heading = inputbox_instructions_int;
 867                         break;
 868                 case S_HEX:
 869                         heading = inputbox_instructions_hex;
 870                         break;
 871                 case S_STRING:
 872                         heading = inputbox_instructions_string;
 873                         break;
 874                 default:
 875                         heading = "Internal mconf error!";
 876                 }
 877                 dialog_clear();
 878                 res = dialog_inputbox(prompt ? prompt : "Main Menu",
 879                                       heading, 10, 75,
 880                                       sym_get_string_value(menu->sym));
 881                 switch (res) {
 882                 case 0:
 883                         if (sym_set_string_value(menu->sym, dialog_input_result))
 884                                 return;
 885                         show_textbox(NULL, "You have made an invalid entry.", 5, 43);
 886                         break;
 887                 case 1:
 888                         show_help(menu);
 889                         break;
 890                 case KEY_ESC:
 891                         return;
 892                 }
 893         }
 894 }
 895 
 896 static void conf_load(void)
 897 {
 898 
 899         while (1) {
 900                 int res;
 901                 dialog_clear();
 902                 res = dialog_inputbox(NULL, load_config_text,
 903                                       11, 55, filename);
 904                 switch(res) {
 905                 case 0:
 906                         if (!dialog_input_result[0])
 907                                 return;
 908                         if (!conf_read(dialog_input_result)) {
 909                                 set_config_filename(dialog_input_result);
 910                                 sym_set_change_count(1);
 911                                 return;
 912                         }
 913                         show_textbox(NULL, "File does not exist!", 5, 38);
 914                         break;
 915                 case 1:
 916                         show_helptext("Load Alternate Configuration", load_config_help);
 917                         break;
 918                 case KEY_ESC:
 919                         return;
 920                 }
 921         }
 922 }
 923 
 924 static void conf_save(void)
 925 {
 926         while (1) {
 927                 int res;
 928                 dialog_clear();
 929                 res = dialog_inputbox(NULL, save_config_text,
 930                                       11, 55, filename);
 931                 switch(res) {
 932                 case 0:
 933                         if (!dialog_input_result[0])
 934                                 return;
 935                         if (!conf_write(dialog_input_result)) {
 936                                 set_config_filename(dialog_input_result);
 937                                 return;
 938                         }
 939                         show_textbox(NULL, "Can't create file!", 5, 60);
 940                         break;
 941                 case 1:
 942                         show_helptext("Save Alternate Configuration", save_config_help);
 943                         break;
 944                 case KEY_ESC:
 945                         return;
 946                 }
 947         }
 948 }
 949 
 950 static int handle_exit(void)
 951 {
 952         int res;
 953 
 954         save_and_exit = 1;
 955         reset_subtitle();
 956         dialog_clear();
 957         if (conf_get_changed())
 958                 res = dialog_yesno(NULL,
 959                                    "Do you wish to save your new configuration?\n"
 960                                      "(Press <ESC><ESC> to continue kernel configuration.)",
 961                                    6, 60);
 962         else
 963                 res = -1;
 964 
 965         end_dialog(saved_x, saved_y);
 966 
 967         switch (res) {
 968         case 0:
 969                 if (conf_write(filename)) {
 970                         fprintf(stderr, "\n\n"
 971                                           "Error while writing of the configuration.\n"
 972                                           "Your configuration changes were NOT saved."
 973                                           "\n\n");
 974                         return 1;
 975                 }
 976                 conf_write_autoconf(0);
 977                 /* fall through */
 978         case -1:
 979                 if (!silent)
 980                         printf("\n\n"
 981                                  "*** End of the configuration.\n"
 982                                  "*** Execute 'make' to start the build or try 'make help'."
 983                                  "\n\n");
 984                 res = 0;
 985                 break;
 986         default:
 987                 if (!silent)
 988                         fprintf(stderr, "\n\n"
 989                                           "Your configuration changes were NOT saved."
 990                                           "\n\n");
 991                 if (res != KEY_ESC)
 992                         res = 0;
 993         }
 994 
 995         return res;
 996 }
 997 
 998 static void sig_handler(int signo)
 999 {
1000         exit(handle_exit());
1001 }
1002 
1003 int main(int ac, char **av)
1004 {
1005         char *mode;
1006         int res;
1007 
1008         signal(SIGINT, sig_handler);
1009 
1010         if (ac > 1 && strcmp(av[1], "-s") == 0) {
1011                 silent = 1;
1012                 /* Silence conf_read() until the real callback is set up */
1013                 conf_set_message_callback(NULL);
1014                 av++;
1015         }
1016         conf_parse(av[1]);
1017         conf_read(NULL);
1018 
1019         mode = getenv("MENUCONFIG_MODE");
1020         if (mode) {
1021                 if (!strcasecmp(mode, "single_menu"))
1022                         single_menu_mode = 1;
1023         }
1024 
1025         if (init_dialog(NULL)) {
1026                 fprintf(stderr, "Your display is too small to run Menuconfig!\n");
1027                 fprintf(stderr, "It must be at least 19 lines by 80 columns.\n");
1028                 return 1;
1029         }
1030 
1031         set_config_filename(conf_get_configname());
1032         conf_set_message_callback(conf_message_callback);
1033         do {
1034                 conf(&rootmenu, NULL);
1035                 res = handle_exit();
1036         } while (res == KEY_ESC);
1037 
1038         return res;
1039 }

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