scripts/kconfig/mconf.c

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