util/kconfig/mconf.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
   4  *
   5  * Introduced single menu mode (show all sub-menus in one large tree).
   6  * 2002-11-06 Petr Baudis <pasky@ucw.cz>
   7  *
   8  * i18n, 2005, Arnaldo Carvalho de Melo <acme@conectiva.com.br>
   9  */
  10
  11 #include <ctype.h>
  12 #include <errno.h>
  13 #include <fcntl.h>
  14 #include <limits.h>
  15 #include <stdarg.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18 #include <strings.h>
  19 #include <signal.h>
  20 #include <unistd.h>
  21
  22 #include "lkc.h"
  23 #include "lxdialog/dialog.h"
  24 #include "mnconf-common.h"
  25
  26 static const char mconf_readme[] =
  27 "Overview\n"
  28 "--------\n"
  29 "This interface lets you select features and parameters for the build.\n"
  30 "Features can either be built-in, modularized, or ignored. Parameters\n"
  31 "must be entered in as decimal or hexadecimal numbers or text.\n"
  32 "\n"
  33 "Menu items beginning with following braces represent features that\n"
  34 "  [ ] can be built in or removed\n"
  35 "  < > can be built in, modularized or removed\n"
  36 "  { } can be built in or modularized (selected by other feature)\n"
  37 "  - - are selected by other feature,\n"
  38 "while *, M or whitespace inside braces means to build in, build as\n"
  39 "a module or to exclude the feature respectively.\n"
  40 "\n"
  41 "To change any of these features, highlight it with the cursor\n"
  42 "keys and press <Y> to build it in, <M> to make it a module or\n"
  43 "<N> to remove it.  You may also press the <Space Bar> to cycle\n"
  44 "through the available options (i.e. Y->N->M->Y).\n"
  45 "\n"
  46 "Some additional keyboard hints:\n"
  47 "\n"
  48 "Menus\n"
  49 "----------\n"
  50 "o  Use the Up/Down arrow keys (cursor keys) to highlight the item you\n"
  51 "   wish to change or the submenu you wish to select and press <Enter>.\n"
  52 "   Submenus are designated by \"--->\", empty ones by \"----\".\n"
  53 "\n"
  54 "   Shortcut: Press the option's highlighted letter (hotkey).\n"
  55 "             Pressing a hotkey more than once will sequence\n"
  56 "             through all visible items which use that hotkey.\n"
  57 "\n"
  58 "   You may also use the <PAGE UP> and <PAGE DOWN> keys to scroll\n"
  59 "   unseen options into view.\n"
  60 "\n"
  61 "o  To exit a menu use the cursor keys to highlight the <Exit> button\n"
  62 "   and press <ENTER>.\n"
  63 "\n"
  64 "   Shortcut: Press <ESC><ESC> or <E> or <X> if there is no hotkey\n"
  65 "             using those letters.  You may press a single <ESC>, but\n"
  66 "             there is a delayed response which you may find annoying.\n"
  67 "\n"
  68 "   Also, the <TAB> and cursor keys will cycle between <Select>,\n"
  69 "   <Exit>, <Help>, <Save>, and <Load>.\n"
  70 "\n"
  71 "o  To get help with an item, use the cursor keys to highlight <Help>\n"
  72 "   and press <ENTER>.\n"
  73 "\n"
  74 "   Shortcut: Press <H> or <?>.\n"
  75 "\n"
  76 "o  To toggle the display of hidden options, press <Z>.\n"
  77 "\n"
  78 "\n"
  79 "Radiolists  (Choice lists)\n"
  80 "-----------\n"
  81 "o  Use the cursor keys to select the option you wish to set and press\n"
  82 "   <S> or the <SPACE BAR>.\n"
  83 "\n"
  84 "   Shortcut: Press the first letter of the option you wish to set then\n"
  85 "             press <S> or <SPACE BAR>.\n"
  86 "\n"
  87 "o  To see available help for the item, use the cursor keys to highlight\n"
  88 "   <Help> and Press <ENTER>.\n"
  89 "\n"
  90 "   Shortcut: Press <H> or <?>.\n"
  91 "\n"
  92 "   Also, the <TAB> and cursor keys will cycle between <Select> and\n"
  93 "   <Help>\n"
  94 "\n"
  95 "\n"
  96 "Data Entry\n"
  97 "-----------\n"
  98 "o  Enter the requested information and press <ENTER>\n"
  99 "   If you are entering hexadecimal values, it is not necessary to\n"
 100 "   add the '0x' prefix to the entry.\n"
 101 "\n"
 102 "o  For help, use the <TAB> or cursor keys to highlight the help option\n"
 103 "   and press <ENTER>.  You can try <TAB><H> as well.\n"
 104 "\n"
 105 "\n"
 106 "Text Box    (Help Window)\n"
 107 "--------\n"
 108 "o  Use the cursor keys to scroll up/down/left/right.  The VI editor\n"
 109 "   keys h,j,k,l function here as do <u>, <d>, <SPACE BAR> and <B> for\n"
 110 "   those who are familiar with less and lynx.\n"
 111 "\n"
 112 "o  Press <E>, <X>, <q>, <Enter> or <Esc><Esc> to exit.\n"
 113 "\n"
 114 "\n"
 115 "Alternate Configuration Files\n"
 116 "-----------------------------\n"
 117 "Menuconfig supports the use of alternate configuration files for\n"
 118 "those who, for various reasons, find it necessary to switch\n"
 119 "between different configurations.\n"
 120 "\n"
 121 "The <Save> button will let you save the current configuration to\n"
 122 "a file of your choosing.  Use the <Load> button to load a previously\n"
 123 "saved alternate configuration.\n"
 124 "\n"
 125 "Even if you don't use alternate configuration files, but you find\n"
 126 "during a Menuconfig session that you have completely messed up your\n"
 127 "settings, you may use the <Load> button to restore your previously\n"
 128 "saved settings from \".config\" without restarting Menuconfig.\n"
 129 "\n"
 130 "Other information\n"
 131 "-----------------\n"
 132 "If you use Menuconfig in an XTERM window, make sure you have your\n"
 133 "$TERM variable set to point to an xterm definition which supports\n"
 134 "color.  Otherwise, Menuconfig will look rather bad.  Menuconfig will\n"
 135 "not display correctly in an RXVT window because rxvt displays only one\n"
 136 "intensity of color, bright.\n"
 137 "\n"
 138 "Menuconfig will display larger menus on screens or xterms which are\n"
 139 "set to display more than the standard 25 row by 80 column geometry.\n"
 140 "In order for this to work, the \"stty size\" command must be able to\n"
 141 "display the screen's current row and column geometry.  I STRONGLY\n"
 142 "RECOMMEND that you make sure you do NOT have the shell variables\n"
 143 "LINES and COLUMNS exported into your environment.  Some distributions\n"
 144 "export those variables via /etc/profile.  Some ncurses programs can\n"
 145 "become confused when those variables (LINES & COLUMNS) don't reflect\n"
 146 "the true screen size.\n"
 147 "\n"
 148 "Optional personality available\n"
 149 "------------------------------\n"
 150 "If you prefer to have all of the options listed in a single menu,\n"
 151 "rather than the default multimenu hierarchy, run the menuconfig with\n"
 152 "MENUCONFIG_MODE environment variable set to single_menu. Example:\n"
 153 "\n"
 154 "make MENUCONFIG_MODE=single_menu menuconfig\n"
 155 "\n"
 156 "<Enter> will then unroll the appropriate category, or enfold it if it\n"
 157 "is already unrolled.\n"
 158 "\n"
 159 "Note that this mode can eventually be a little more CPU expensive\n"
 160 "(especially with a larger number of unrolled categories) than the\n"
 161 "default mode.\n"
 162 "\n"
 163
 164 "Search\n"
 165 "-------\n"
 166 "Pressing the forward-slash (/) anywhere brings up a search dialog box.\n"
 167 "\n"
 168
 169 "Different color themes available\n"
 170 "--------------------------------\n"
 171 "It is possible to select different color themes using the variable\n"
 172 "MENUCONFIG_COLOR. To select a theme use:\n"
 173 "\n"
 174 "make MENUCONFIG_COLOR=<theme> menuconfig\n"
 175 "\n"
 176 "Available themes are\n"
 177 " mono       => selects colors suitable for monochrome displays\n"
 178 " blackbg    => selects a color scheme with black background\n"
 179 " classic    => theme with blue background. The classic look\n"
 180 " bluetitle  => an LCD friendly version of classic. (default)\n"
 181 "\n",
 182 menu_instructions[] =
 183         "Arrow keys navigate the menu.  "
 184         "<Enter> selects submenus ---> (or empty submenus ----).  "
 185         "Highlighted letters are hotkeys.  "
 186         "Pressing <Y> includes, <N> excludes, <M> modularizes features.  "
 187         "Press <Esc><Esc> to exit, <?> for Help, </> for Search.  "
 188         "Legend: [*] built-in  [ ] excluded  <M> module  < > module capable",
 189 radiolist_instructions[] =
 190         "Use the arrow keys to navigate this window or "
 191         "press the hotkey of the item you wish to select "
 192         "followed by the <SPACE BAR>. "
 193         "Press <?> for additional information about this option.",
 194 inputbox_instructions_int[] =
 195         "Please enter a decimal value. "
 196         "Fractions will not be accepted.  "
 197         "Use the <TAB> key to move from the input field to the buttons below it.",
 198 inputbox_instructions_hex[] =
 199         "Please enter a hexadecimal value. "
 200         "Use the <TAB> key to move from the input field to the buttons below it.",
 201 inputbox_instructions_string[] =
 202         "Please enter a string value. "
 203         "Use the <TAB> key to move from the input field to the buttons below it.",
 204 setmod_text[] =
 205         "This feature depends on another which has been configured as a module.\n"
 206         "As a result, this feature will be built as a module.",
 207 load_config_text[] =
 208         "Enter the name of the configuration file you wish to load.  "
 209         "Accept the name shown to restore the configuration you "
 210         "last retrieved.  Leave blank to abort.",
 211 load_config_help[] =
 212         "\n"
 213         "For various reasons, one may wish to keep several different\n"
 214         "configurations available on a single machine.\n"
 215         "\n"
 216         "If you have saved a previous configuration in a file other than the\n"
 217         "default one, entering its name here will allow you to modify that\n"
 218         "configuration.\n"
 219         "\n"
 220         "If you are uncertain, then you have probably never used alternate\n"
 221         "configuration files. You should therefore leave this blank to abort.\n",
 222 save_config_text[] =
 223         "Enter a filename to which this configuration should be saved "
 224         "as an alternate.  Leave blank to abort.",
 225 save_config_help[] =
 226         "\n"
 227         "For various reasons, one may wish to keep different configurations\n"
 228         "available on a single machine.\n"
 229         "\n"
 230         "Entering a file name here will allow you to later retrieve, modify\n"
 231         "and use the current configuration as an alternate to whatever\n"
 232         "configuration options you have selected at that time.\n"
 233         "\n"
 234         "If you are uncertain what all this means then you should probably\n"
 235         "leave this blank.\n",
 236 search_help[] =
 237         "\n"
 238         "Search for symbols and display their relations.\n"
 239         "Regular expressions are allowed.\n"
 240         "Example: search for \"^FOO\"\n"
 241         "Result:\n"
 242         "-----------------------------------------------------------------\n"
 243         "Symbol: FOO [=m]\n"
 244         "Type  : tristate\n"
 245         "Prompt: Foo bus is used to drive the bar HW\n"
 246         "  Location:\n"
 247         "    -> Bus options (PCI, PCMCIA, EISA, ISA)\n"
 248         "      -> PCI support (PCI [=y])\n"
 249         "(1)     -> PCI access mode (<choice> [=y])\n"
 250         "  Defined at drivers/pci/Kconfig:47\n"
 251         "  Depends on: X86_LOCAL_APIC && X86_IO_APIC\n"
 252         "  Selects: LIBCRC32\n"
 253         "  Selected by: BAR [=n]\n"
 254         "-----------------------------------------------------------------\n"
 255         "o The line 'Type:' shows the type of the configuration option for\n"
 256         "  this symbol (bool, tristate, string, ...)\n"
 257         "o The line 'Prompt:' shows the text used in the menu structure for\n"
 258         "  this symbol\n"
 259         "o The 'Defined at' line tells at what file / line number the symbol\n"
 260         "  is defined\n"
 261         "o The 'Depends on:' line tells what symbols need to be defined for\n"
 262         "  this symbol to be visible in the menu (selectable)\n"
 263         "o The 'Location:' lines tells where in the menu structure this symbol\n"
 264         "  is located\n"
 265         "    A location followed by a [=y] indicates that this is a\n"
 266         "    selectable menu item - and the current value is displayed inside\n"
 267         "    brackets.\n"
 268         "    Press the key in the (#) prefix to jump directly to that\n"
 269         "    location. You will be returned to the current search results\n"
 270         "    after exiting this new menu.\n"
 271         "o The 'Selects:' line tells what symbols will be automatically\n"
 272         "  selected if this symbol is selected (y or m)\n"
 273         "o The 'Selected by' line tells what symbol has selected this symbol\n"
 274         "\n"
 275         "Only relevant lines are shown.\n"
 276         "\n\n"
 277         "Search examples:\n"
 278         "Examples: USB  => find all symbols containing USB\n"
 279         "          ^USB => find all symbols starting with USB\n"
 280         "          USB$ => find all symbols ending with USB\n"
 281         "\n";
 282
 283 static int indent;
 284 static struct menu *current_menu;
 285 static int child_count;
 286 static int single_menu_mode;
 287 static int show_all_options;
 288 static int save_and_exit;
 289 static int silent;
 290
 291 static void conf(struct menu *menu, struct menu *active_menu);
 292
 293 static char filename[PATH_MAX+1];
 294 static void set_config_filename(const char *config_filename)
 295 {
 296         static char menu_backtitle[PATH_MAX+128];
 297
 298         snprintf(menu_backtitle, sizeof(menu_backtitle), "%s - %s",
 299                  config_filename, rootmenu.prompt->text);
 300         set_dialog_backtitle(menu_backtitle);
 301
 302         snprintf(filename, sizeof(filename), "%s", config_filename);
 303 }
 304
 305 struct subtitle_part {
 306         struct list_head entries;
 307         const char *text;
 308 };
 309 static LIST_HEAD(trail);
 310
 311 static struct subtitle_list *subtitles;
 312 static void set_subtitle(void)
 313 {
 314         struct subtitle_part *sp;
 315         struct subtitle_list *pos, *tmp;
 316
 317         for (pos = subtitles; pos != NULL; pos = tmp) {
 318                 tmp = pos->next;
 319                 free(pos);
 320         }
 321
 322         subtitles = NULL;
 323         list_for_each_entry(sp, &trail, entries) {
 324                 if (sp->text) {
 325                         if (pos) {
 326                                 pos->next = xcalloc(1, sizeof(*pos));
 327                                 pos = pos->next;
 328                         } else {
 329                                 subtitles = pos = xcalloc(1, sizeof(*pos));
 330                         }
 331                         pos->text = sp->text;
 332                 }
 333         }
 334
 335         set_dialog_subtitles(subtitles);
 336 }
 337
 338 static void reset_subtitle(void)
 339 {
 340         struct subtitle_list *pos, *tmp;
 341
 342         for (pos = subtitles; pos != NULL; pos = tmp) {
 343                 tmp = pos->next;
 344                 free(pos);
 345         }
 346         subtitles = NULL;
 347         set_dialog_subtitles(subtitles);
 348 }
 349
 350 static int show_textbox_ext(const char *title, const char *text, int r, int c,
 351                             int *vscroll, int *hscroll,
 352                             int (*extra_key_cb)(int, size_t, size_t, void *),
 353                             void *data)
 354 {
 355         dialog_clear();
 356         return dialog_textbox(title, text, r, c, vscroll, hscroll,
 357                               extra_key_cb, data);
 358 }
 359
 360 static void show_textbox(const char *title, const char *text, int r, int c)
 361 {
 362         show_textbox_ext(title, text, r, c, NULL, NULL, NULL, NULL);
 363 }
 364
 365 static void show_helptext(const char *title, const char *text)
 366 {
 367         show_textbox(title, text, 0, 0);
 368 }
 369
 370 static void show_help(struct menu *menu)
 371 {
 372         struct gstr help = str_new();
 373
 374         help.max_width = getmaxx(stdscr) - 10;
 375         menu_get_ext_help(menu, &help);
 376
 377         show_helptext(menu_get_prompt(menu), str_get(&help));
 378         str_free(&help);
 379 }
 380
 381 static void search_conf(void)
 382 {
 383         struct symbol **sym_arr;
 384         struct gstr res;
 385         struct gstr title;
 386         char *dialog_input;
 387         int dres, vscroll = 0, hscroll = 0;
 388         bool again;
 389         struct gstr sttext;
 390         struct subtitle_part stpart;
 391
 392         title = str_new();
 393         str_printf( &title, "Enter (sub)string or regexp to search for "
 394                               "(with or without \"%s\")", CONFIG_);
 395
 396 again:
 397         dialog_clear();
 398         dres = dialog_inputbox("Search Configuration Parameter",
 399                               str_get(&title),
 400                               10, 75, "");
 401         switch (dres) {
 402         case 0:
 403                 break;
 404         case 1:
 405                 show_helptext("Search Configuration", search_help);
 406                 goto again;
 407         default:
 408                 str_free(&title);
 409                 return;
 410         }
 411
 412         /* strip the prefix if necessary */
 413         dialog_input = dialog_input_result;
 414         if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
 415                 dialog_input += strlen(CONFIG_);
 416
 417         sttext = str_new();
 418         str_printf(&sttext, "Search (%s)", dialog_input_result);
 419         stpart.text = str_get(&sttext);
 420         list_add_tail(&stpart.entries, &trail);
 421
 422         sym_arr = sym_re_search(dialog_input);
 423         do {
 424                 LIST_HEAD(head);
 425                 struct search_data data = {
 426                         .head = &head,
 427                 };
 428                 struct jump_key *pos, *tmp;
 429
 430                 jump_key_char = 0;
 431                 res = get_relations_str(sym_arr, &head);
 432                 set_subtitle();
 433                 dres = show_textbox_ext("Search Results", str_get(&res), 0, 0,
 434                                         &vscroll, &hscroll,
 435                                         handle_search_keys, &data);
 436                 again = false;
 437                 if (dres >= '1' && dres <= '9') {
 438                         assert(data.target != NULL);
 439                         conf(data.target->parent, data.target);
 440                         again = true;
 441                 }
 442                 str_free(&res);
 443                 list_for_each_entry_safe(pos, tmp, &head, entries)
 444                         free(pos);
 445         } while (again);
 446         free(sym_arr);
 447         str_free(&title);
 448         list_del(trail.prev);
 449         str_free(&sttext);
 450 }
 451
 452 static void build_conf(struct menu *menu)
 453 {
 454         struct symbol *sym;
 455         struct property *prop;
 456         struct menu *child;
 457         int type, tmp, doint = 2;
 458         tristate val;
 459         char ch;
 460         bool visible;
 461
 462         /*
 463          * note: menu_is_visible() has side effect that it will
 464          * recalc the value of the symbol.
 465          */
 466         visible = menu_is_visible(menu);
 467         if (show_all_options && !menu_has_prompt(menu))
 468                 return;
 469         else if (!show_all_options && !visible)
 470                 return;
 471
 472         sym = menu->sym;
 473         prop = menu->prompt;
 474         if (!sym) {
 475                 if (prop && menu != current_menu) {
 476                         const char *prompt = menu_get_prompt(menu);
 477                         switch (prop->type) {
 478                         case P_MENU:
 479                                 child_count++;
 480                                 if (single_menu_mode) {
 481                                         item_make("%s%*c%s",
 482                                                   menu->data ? "-->" : "++>",
 483                                                   indent + 1, ' ', prompt);
 484                                 } else
 485                                         item_make("   %*c%s  %s",
 486                                                   indent + 1, ' ', prompt,
 487                                                   menu_is_empty(menu) ? "----" : "--->");
 488                                 item_set_tag('m');
 489                                 item_set_data(menu);
 490                                 if (single_menu_mode && menu->data)
 491                                         goto conf_childs;
 492                                 return;
 493                         case P_COMMENT:
 494                                 if (prompt) {
 495                                         child_count++;
 496                                         item_make("   %*c*** %s ***", indent + 1, ' ', prompt);
 497                                         item_set_tag(':');
 498                                         item_set_data(menu);
 499                                 }
 500                                 break;
 501                         default:
 502                                 if (prompt) {
 503                                         child_count++;
 504                                         item_make("---%*c%s", indent + 1, ' ', prompt);
 505                                         item_set_tag(':');
 506                                         item_set_data(menu);
 507                                 }
 508                         }
 509                 } else
 510                         doint = 0;
 511                 goto conf_childs;
 512         }
 513
 514         type = sym_get_type(sym);
 515         if (sym_is_choice(sym)) {
 516                 struct symbol *def_sym = sym_get_choice_value(sym);
 517                 struct menu *def_menu = NULL;
 518
 519                 child_count++;
 520                 for (child = menu->list; child; child = child->next) {
 521                         if (menu_is_visible(child) && child->sym == def_sym)
 522                                 def_menu = child;
 523                 }
 524
 525                 val = sym_get_tristate_value(sym);
 526                 if (sym_is_changeable(sym)) {
 527                         switch (type) {
 528                         case S_BOOLEAN:
 529                                 item_make("[%c]", val == no ? ' ' : '*');
 530                                 break;
 531                         case S_TRISTATE:
 532                                 switch (val) {
 533                                 case yes: ch = '*'; break;
 534                                 case mod: ch = 'M'; break;
 535                                 default:  ch = ' '; break;
 536                                 }
 537                                 item_make("<%c>", ch);
 538                                 break;
 539                         }
 540                         item_set_tag('t');
 541                         item_set_data(menu);
 542                 } else {
 543                         item_make("   ");
 544                         item_set_tag(def_menu ? 't' : ':');
 545                         item_set_data(menu);
 546                 }
 547
 548                 item_add_str("%*c%s", indent + 1, ' ', menu_get_prompt(menu));
 549                 if (val == yes) {
 550                         if (def_menu) {
 551                                 item_add_str(" (%s)", menu_get_prompt(def_menu));
 552                                 item_add_str("  --->");
 553                                 if (def_menu->list) {
 554                                         indent += 2;
 555                                         build_conf(def_menu);
 556                                         indent -= 2;
 557                                 }
 558                         }
 559                         return;
 560                 }
 561         } else {
 562                 if (menu == current_menu) {
 563                         item_make("---%*c%s", indent + 1, ' ', menu_get_prompt(menu));
 564                         item_set_tag(':');
 565                         item_set_data(menu);
 566                         goto conf_childs;
 567                 }
 568                 child_count++;
 569                 val = sym_get_tristate_value(sym);
 570                 if (sym_is_choice_value(sym) && val == yes) {
 571                         item_make("   ");
 572                         item_set_tag(':');
 573                         item_set_data(menu);
 574                 } else {
 575                         switch (type) {
 576                         case S_BOOLEAN:
 577                                 if (sym_is_changeable(sym))
 578                                         item_make("[%c]", val == no ? ' ' : '*');
 579                                 else
 580                                         item_make("-%c-", val == no ? ' ' : '*');
 581                                 item_set_tag('t');
 582                                 item_set_data(menu);
 583                                 break;
 584                         case S_TRISTATE:
 585                                 switch (val) {
 586                                 case yes: ch = '*'; break;
 587                                 case mod: ch = 'M'; break;
 588                                 default:  ch = ' '; break;
 589                                 }
 590                                 if (sym_is_changeable(sym)) {
 591                                         if (sym->rev_dep.tri == mod)
 592                                                 item_make("{%c}", ch);
 593                                         else
 594                                                 item_make("<%c>", ch);
 595                                 } else
 596                                         item_make("-%c-", ch);
 597                                 item_set_tag('t');
 598                                 item_set_data(menu);
 599                                 break;
 600                         default:
 601                                 tmp = 2 + strlen(sym_get_string_value(sym)); /* () = 2 */
 602                                 item_make("(%s)", sym_get_string_value(sym));
 603                                 tmp = indent - tmp + 4;
 604                                 if (tmp < 0)
 605                                         tmp = 0;
 606                                 item_add_str("%*c%s%s", tmp, ' ', menu_get_prompt(menu),
 607                                              (sym_has_value(sym) || !sym_is_changeable(sym)) ?
 608                                              "" : " (NEW)");
 609                                 item_set_tag('s');
 610                                 item_set_data(menu);
 611                                 goto conf_childs;
 612                         }
 613                 }
 614                 item_add_str("%*c%s%s", indent + 1, ' ', menu_get_prompt(menu),
 615                           (sym_has_value(sym) || !sym_is_changeable(sym)) ?
 616                           "" : " (NEW)");
 617                 if (menu->prompt->type == P_MENU) {
 618                         item_add_str("  %s", menu_is_empty(menu) ? "----" : "--->");
 619                         return;
 620                 }
 621         }
 622
 623 conf_childs:
 624         indent += doint;
 625         for (child = menu->list; child; child = child->next)
 626                 build_conf(child);
 627         indent -= doint;
 628 }
 629
 630 static void conf_choice(struct menu *menu)
 631 {
 632         const char *prompt = menu_get_prompt(menu);
 633         struct menu *child;
 634         struct symbol *active;
 635
 636         active = sym_get_choice_value(menu->sym);
 637         while (1) {
 638                 int res;
 639                 int selected;
 640                 item_reset();
 641
 642                 current_menu = menu;
 643                 for (child = menu->list; child; child = child->next) {
 644                         if (!menu_is_visible(child))
 645                                 continue;
 646                         if (child->sym)
 647                                 item_make("%s", menu_get_prompt(child));
 648                         else {
 649                                 item_make("*** %s ***", menu_get_prompt(child));
 650                                 item_set_tag(':');
 651                         }
 652                         item_set_data(child);
 653                         if (child->sym == active)
 654                                 item_set_selected(1);
 655                         if (child->sym == sym_get_choice_value(menu->sym))
 656                                 item_set_tag('X');
 657                 }
 658                 dialog_clear();
 659                 res = dialog_checklist(prompt ? prompt : "Main Menu",
 660                                         radiolist_instructions,
 661                                         MENUBOX_HEIGTH_MIN,
 662                                         MENUBOX_WIDTH_MIN,
 663                                         CHECKLIST_HEIGTH_MIN);
 664                 selected = item_activate_selected();
 665                 switch (res) {
 666                 case 0:
 667                         if (selected) {
 668                                 child = item_data();
 669                                 if (!child->sym)
 670                                         break;
 671
 672                                 sym_set_tristate_value(child->sym, yes);
 673                         }
 674                         return;
 675                 case 1:
 676                         if (selected) {
 677                                 child = item_data();
 678                                 show_help(child);
 679                                 active = child->sym;
 680                         } else
 681                                 show_help(menu);
 682                         break;
 683                 case KEY_ESC:
 684                         return;
 685                 case -ERRDISPLAYTOOSMALL:
 686                         return;
 687                 }
 688         }
 689 }
 690
 691 static void conf_string(struct menu *menu)
 692 {
 693         const char *prompt = menu_get_prompt(menu);
 694
 695         while (1) {
 696                 int res;
 697                 const char *heading;
 698
 699                 switch (sym_get_type(menu->sym)) {
 700                 case S_INT:
 701                         heading = inputbox_instructions_int;
 702                         break;
 703                 case S_HEX:
 704                         heading = inputbox_instructions_hex;
 705                         break;
 706                 case S_STRING:
 707                         heading = inputbox_instructions_string;
 708                         break;
 709                 default:
 710                         heading = "Internal mconf error!";
 711                 }
 712                 dialog_clear();
 713                 res = dialog_inputbox(prompt ? prompt : "Main Menu",
 714                                       heading, 10, 75,
 715                                       sym_get_string_value(menu->sym));
 716                 switch (res) {
 717                 case 0:
 718                         if (sym_set_string_value(menu->sym, dialog_input_result))
 719                                 return;
 720                         show_textbox(NULL, "You have made an invalid entry.", 5, 43);
 721                         break;
 722                 case 1:
 723                         show_help(menu);
 724                         break;
 725                 case KEY_ESC:
 726                         return;
 727                 }
 728         }
 729 }
 730
 731 static void conf_load(void)
 732 {
 733
 734         while (1) {
 735                 int res;
 736                 dialog_clear();
 737                 res = dialog_inputbox(NULL, load_config_text,
 738                                       11, 55, filename);
 739                 switch(res) {
 740                 case 0:
 741                         if (!dialog_input_result[0])
 742                                 return;
 743                         if (!conf_read(dialog_input_result)) {
 744                                 set_config_filename(dialog_input_result);
 745                                 conf_set_changed(true);
 746                                 return;
 747                         }
 748                         show_textbox(NULL, "File does not exist!", 5, 38);
 749                         break;
 750                 case 1:
 751                         show_helptext("Load Alternate Configuration", load_config_help);
 752                         break;
 753                 case KEY_ESC:
 754                         return;
 755                 }
 756         }
 757 }
 758
 759 static void conf_save(void)
 760 {
 761         while (1) {
 762                 int res;
 763                 dialog_clear();
 764                 res = dialog_inputbox(NULL, save_config_text,
 765                                       11, 55, filename);
 766                 switch(res) {
 767                 case 0:
 768                         if (!dialog_input_result[0])
 769                                 return;
 770                         if (!conf_write(dialog_input_result)) {
 771                                 set_config_filename(dialog_input_result);
 772                                 return;
 773                         }
 774                         show_textbox(NULL, "Can't create file!", 5, 60);
 775                         break;
 776                 case 1:
 777                         show_helptext("Save Alternate Configuration", save_config_help);
 778                         break;
 779                 case KEY_ESC:
 780                         return;
 781                 }
 782         }
 783 }
 784
 785 static void conf(struct menu *menu, struct menu *active_menu)
 786 {
 787         struct menu *submenu;
 788         const char *prompt = menu_get_prompt(menu);
 789         struct subtitle_part stpart;
 790         struct symbol *sym;
 791         int res;
 792         int s_scroll = 0;
 793
 794         if (menu != &rootmenu)
 795                 stpart.text = menu_get_prompt(menu);
 796         else
 797                 stpart.text = NULL;
 798         list_add_tail(&stpart.entries, &trail);
 799
 800         while (1) {
 801                 item_reset();
 802                 current_menu = menu;
 803                 build_conf(menu);
 804                 if (!child_count)
 805                         break;
 806                 set_subtitle();
 807                 dialog_clear();
 808                 res = dialog_menu(prompt ? prompt : "Main Menu",
 809                                   menu_instructions,
 810                                   active_menu, &s_scroll);
 811                 if (res == 1 || res == KEY_ESC || res == -ERRDISPLAYTOOSMALL)
 812                         break;
 813                 if (item_count() != 0) {
 814                         if (!item_activate_selected())
 815                                 continue;
 816                         if (!item_tag())
 817                                 continue;
 818                 }
 819                 submenu = item_data();
 820                 active_menu = item_data();
 821                 if (submenu)
 822                         sym = submenu->sym;
 823                 else
 824                         sym = NULL;
 825
 826                 switch (res) {
 827                 case 0:
 828                         switch (item_tag()) {
 829                         case 'm':
 830                                 if (single_menu_mode)
 831                                         submenu->data = (void *) (long) !submenu->data;
 832                                 else
 833                                         conf(submenu, NULL);
 834                                 break;
 835                         case 't':
 836                                 if (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)
 837                                         conf_choice(submenu);
 838                                 else if (submenu->prompt->type == P_MENU)
 839                                         conf(submenu, NULL);
 840                                 break;
 841                         case 's':
 842                                 conf_string(submenu);
 843                                 break;
 844                         }
 845                         break;
 846                 case 2:
 847                         if (sym)
 848                                 show_help(submenu);
 849                         else {
 850                                 reset_subtitle();
 851                                 show_helptext("README", mconf_readme);
 852                         }
 853                         break;
 854                 case 3:
 855                         reset_subtitle();
 856                         conf_save();
 857                         break;
 858                 case 4:
 859                         reset_subtitle();
 860                         conf_load();
 861                         break;
 862                 case 5:
 863                         if (item_is_tag('t')) {
 864                                 if (sym_set_tristate_value(sym, yes))
 865                                         break;
 866                                 if (sym_set_tristate_value(sym, mod))
 867                                         show_textbox(NULL, setmod_text, 6, 74);
 868                         }
 869                         break;
 870                 case 6:
 871                         if (item_is_tag('t'))
 872                                 sym_set_tristate_value(sym, no);
 873                         break;
 874                 case 7:
 875                         if (item_is_tag('t'))
 876                                 sym_set_tristate_value(sym, mod);
 877                         break;
 878                 case 8:
 879                         if (item_is_tag('t'))
 880                                 sym_toggle_tristate_value(sym);
 881                         else if (item_is_tag('m'))
 882                                 conf(submenu, NULL);
 883                         break;
 884                 case 9:
 885                         search_conf();
 886                         break;
 887                 case 10:
 888                         show_all_options = !show_all_options;
 889                         break;
 890                 }
 891         }
 892
 893         list_del(trail.prev);
 894 }
 895
 896 static void conf_message_callback(const char *s)
 897 {
 898         if (save_and_exit) {
 899                 if (!silent)
 900                         printf("%s", s);
 901         } else {
 902                 show_textbox(NULL, s, 6, 60);
 903         }
 904 }
 905
 906 static int handle_exit(void)
 907 {
 908         int res;
 909
 910         save_and_exit = 1;
 911         reset_subtitle();
 912         dialog_clear();
 913         if (conf_get_changed())
 914                 res = dialog_yesno(NULL,
 915                                    "Do you wish to save your new configuration?\n"
 916                                      "(Press <ESC><ESC> to continue kernel configuration.)",
 917                                    6, 60);
 918         else
 919                 res = -1;
 920
 921         end_dialog(saved_x, saved_y);
 922
 923         switch (res) {
 924         case 0:
 925                 if (conf_write(filename)) {
 926                         fprintf(stderr, "\n\n"
 927                                           "Error while writing of the configuration.\n"
 928                                           "Your configuration changes were NOT saved."
 929                                           "\n\n");
 930                         return 1;
 931                 }
 932                 conf_write_autoconf(0);
 933                 /* fall through */
 934         case -1:
 935                 if (!silent)
 936                         printf("\n\n"
 937                                  "*** End of the configuration.\n"
 938                                  "*** Execute 'make' to start the build or try 'make help'."
 939                                  "\n\n");
 940                 res = 0;
 941                 break;
 942         default:
 943                 if (!silent)
 944                         fprintf(stderr, "\n\n"
 945                                           "Your configuration changes were NOT saved."
 946                                           "\n\n");
 947                 if (res != KEY_ESC)
 948                         res = 0;
 949         }
 950
 951         return res;
 952 }
 953
 954 static void sig_handler(int signo)
 955 {
 956         exit(handle_exit());
 957 }
 958
 959 int main(int ac, char **av)
 960 {
 961         char *mode;
 962         int res;
 963
 964         signal(SIGINT, sig_handler);
 965
 966         if (ac > 1 && strcmp(av[1], "-s") == 0) {
 967                 silent = 1;
 968                 /* Silence conf_read() until the real callback is set up */
 969                 conf_set_message_callback(NULL);
 970                 av++;
 971         }
 972         conf_parse(av[1]);
 973         conf_read(NULL);
 974
 975         mode = getenv("MENUCONFIG_MODE");
 976         if (mode) {
 977                 if (!strcasecmp(mode, "single_menu"))
 978                         single_menu_mode = 1;
 979         }
 980
 981         if (init_dialog(NULL)) {
 982                 fprintf(stderr, "Your display is too small to run Menuconfig!\n");
 983                 fprintf(stderr, "It must be at least 19 lines by 80 columns.\n");
 984                 return 1;
 985         }
 986
 987         set_config_filename(conf_get_configname());
 988         conf_set_message_callback(conf_message_callback);
 989         do {
 990                 conf(&rootmenu, NULL);
 991                 res = handle_exit();
 992         } while (res == KEY_ESC);
 993
 994         return res;
 995 }