scripts/config/conf.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
   4  */
   5
   6 #include <ctype.h>
   7 #include <limits.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <time.h>
  12 #include <unistd.h>
  13 #include <getopt.h>
  14 #include <sys/time.h>
  15 #include <errno.h>
  16
  17 #include "lkc.h"
  18
  19 static void conf(struct menu *menu);
  20 static void check_conf(struct menu *menu);
  21
  22 enum input_mode {
  23         oldaskconfig,
  24         syncconfig,
  25         oldconfig,
  26         allnoconfig,
  27         allyesconfig,
  28         allmodconfig,
  29         alldefconfig,
  30         randconfig,
  31         defconfig,
  32         savedefconfig,
  33         listnewconfig,
  34         helpnewconfig,
  35         olddefconfig,
  36         yes2modconfig,
  37         mod2yesconfig,
  38         mod2noconfig,
  39         fatalrecursive,
  40 };
  41 static enum input_mode input_mode = oldaskconfig;
  42 static int input_mode_opt;
  43 static int indent = 1;
  44 static int tty_stdio;
  45 static int sync_kconfig;
  46 static int conf_cnt;
  47 static char line[PATH_MAX];
  48 static struct menu *rootEntry;
  49
  50 static void print_help(struct menu *menu)
  51 {
  52         struct gstr help = str_new();
  53
  54         menu_get_ext_help(menu, &help);
  55
  56         printf("\n%s\n", str_get(&help));
  57         str_free(&help);
  58 }
  59
  60 static void strip(char *str)
  61 {
  62         char *p = str;
  63         int l;
  64
  65         while ((isspace(*p)))
  66                 p++;
  67         l = strlen(p);
  68         if (p != str)
  69                 memmove(str, p, l + 1);
  70         if (!l)
  71                 return;
  72         p = str + l - 1;
  73         while ((isspace(*p)))
  74                 *p-- = 0;
  75 }
  76
  77 /* Helper function to facilitate fgets() by Jean Sacren. */
  78 static void xfgets(char *str, int size, FILE *in)
  79 {
  80         if (!fgets(str, size, in))
  81                 fprintf(stderr, "\nError in reading or end of file.\n");
  82
  83         if (!tty_stdio)
  84                 printf("%s", str);
  85 }
  86
  87 static void set_randconfig_seed(void)
  88 {
  89         unsigned int seed;
  90         char *env;
  91         bool seed_set = false;
  92
  93         env = getenv("KCONFIG_SEED");
  94         if (env && *env) {
  95                 char *endp;
  96
  97                 seed = strtol(env, &endp, 0);
  98                 if (*endp == '\0')
  99                         seed_set = true;
 100         }
 101
 102         if (!seed_set) {
 103                 struct timeval now;
 104
 105                 /*
 106                  * Use microseconds derived seed, compensate for systems where it may
 107                  * be zero.
 108                  */
 109                 gettimeofday(&now, NULL);
 110                 seed = (now.tv_sec + 1) * (now.tv_usec + 1);
 111         }
 112
 113         printf("KCONFIG_SEED=0x%X\n", seed);
 114         srand(seed);
 115 }
 116
 117 static bool randomize_choice_values(struct symbol *csym)
 118 {
 119         struct property *prop;
 120         struct symbol *sym;
 121         struct expr *e;
 122         int cnt, def;
 123
 124         /*
 125          * If choice is mod then we may have more items selected
 126          * and if no then no-one.
 127          * In both cases stop.
 128          */
 129         if (csym->curr.tri != yes)
 130                 return false;
 131
 132         prop = sym_get_choice_prop(csym);
 133
 134         /* count entries in choice block */
 135         cnt = 0;
 136         expr_list_for_each_sym(prop->expr, e, sym)
 137                 cnt++;
 138
 139         /*
 140          * find a random value and set it to yes,
 141          * set the rest to no so we have only one set
 142          */
 143         def = rand() % cnt;
 144
 145         cnt = 0;
 146         expr_list_for_each_sym(prop->expr, e, sym) {
 147                 if (def == cnt++) {
 148                         sym->def[S_DEF_USER].tri = yes;
 149                         csym->def[S_DEF_USER].val = sym;
 150                 } else {
 151                         sym->def[S_DEF_USER].tri = no;
 152                 }
 153                 sym->flags |= SYMBOL_DEF_USER;
 154                 /* clear VALID to get value calculated */
 155                 sym->flags &= ~SYMBOL_VALID;
 156         }
 157         csym->flags |= SYMBOL_DEF_USER;
 158         /* clear VALID to get value calculated */
 159         csym->flags &= ~SYMBOL_VALID;
 160
 161         return true;
 162 }
 163
 164 enum conf_def_mode {
 165         def_default,
 166         def_yes,
 167         def_mod,
 168         def_no,
 169         def_random
 170 };
 171
 172 static bool conf_set_all_new_symbols(enum conf_def_mode mode)
 173 {
 174         struct symbol *sym, *csym;
 175         int i, cnt;
 176         /*
 177          * can't go as the default in switch-case below, otherwise gcc whines
 178          * about -Wmaybe-uninitialized
 179          */
 180         int pby = 50; /* probability of bool     = y */
 181         int pty = 33; /* probability of tristate = y */
 182         int ptm = 33; /* probability of tristate = m */
 183         bool has_changed = false;
 184
 185         if (mode == def_random) {
 186                 int n, p[3];
 187                 char *env = getenv("KCONFIG_PROBABILITY");
 188
 189                 n = 0;
 190                 while (env && *env) {
 191                         char *endp;
 192                         int tmp = strtol(env, &endp, 10);
 193
 194                         if (tmp >= 0 && tmp <= 100) {
 195                                 p[n++] = tmp;
 196                         } else {
 197                                 errno = ERANGE;
 198                                 perror("KCONFIG_PROBABILITY");
 199                                 exit(1);
 200                         }
 201                         env = (*endp == ':') ? endp + 1 : endp;
 202                         if (n >= 3)
 203                                 break;
 204                 }
 205                 switch (n) {
 206                 case 1:
 207                         pby = p[0];
 208                         ptm = pby / 2;
 209                         pty = pby - ptm;
 210                         break;
 211                 case 2:
 212                         pty = p[0];
 213                         ptm = p[1];
 214                         pby = pty + ptm;
 215                         break;
 216                 case 3:
 217                         pby = p[0];
 218                         pty = p[1];
 219                         ptm = p[2];
 220                         break;
 221                 }
 222
 223                 if (pty + ptm > 100) {
 224                         errno = ERANGE;
 225                         perror("KCONFIG_PROBABILITY");
 226                         exit(1);
 227                 }
 228         }
 229
 230         sym_clear_all_valid();
 231
 232         for_all_symbols(i, sym) {
 233                 if (sym_has_value(sym) || sym->flags & SYMBOL_VALID)
 234                         continue;
 235                 switch (sym_get_type(sym)) {
 236                 case S_BOOLEAN:
 237                 case S_TRISTATE:
 238                         has_changed = true;
 239                         switch (mode) {
 240                         case def_yes:
 241                                 sym->def[S_DEF_USER].tri = yes;
 242                                 break;
 243                         case def_mod:
 244                                 sym->def[S_DEF_USER].tri = mod;
 245                                 break;
 246                         case def_no:
 247                                 sym->def[S_DEF_USER].tri = no;
 248                                 break;
 249                         case def_random:
 250                                 sym->def[S_DEF_USER].tri = no;
 251                                 cnt = rand() % 100;
 252                                 if (sym->type == S_TRISTATE) {
 253                                         if (cnt < pty)
 254                                                 sym->def[S_DEF_USER].tri = yes;
 255                                         else if (cnt < pty + ptm)
 256                                                 sym->def[S_DEF_USER].tri = mod;
 257                                 } else if (cnt < pby)
 258                                         sym->def[S_DEF_USER].tri = yes;
 259                                 break;
 260                         default:
 261                                 continue;
 262                         }
 263                         if (!(sym_is_choice(sym) && mode == def_random))
 264                                 sym->flags |= SYMBOL_DEF_USER;
 265                         break;
 266                 default:
 267                         break;
 268                 }
 269
 270         }
 271
 272         /*
 273          * We have different type of choice blocks.
 274          * If curr.tri equals to mod then we can select several
 275          * choice symbols in one block.
 276          * In this case we do nothing.
 277          * If curr.tri equals yes then only one symbol can be
 278          * selected in a choice block and we set it to yes,
 279          * and the rest to no.
 280          */
 281         if (mode != def_random) {
 282                 for_all_symbols(i, csym) {
 283                         if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
 284                             sym_is_choice_value(csym))
 285                                 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
 286                 }
 287         }
 288
 289         for_all_symbols(i, csym) {
 290                 if (sym_has_value(csym) || !sym_is_choice(csym))
 291                         continue;
 292
 293                 sym_calc_value(csym);
 294                 if (mode == def_random)
 295                         has_changed |= randomize_choice_values(csym);
 296                 else {
 297                         set_all_choice_values(csym);
 298                         has_changed = true;
 299                 }
 300         }
 301
 302         return has_changed;
 303 }
 304
 305 static void conf_rewrite_tristates(tristate old_val, tristate new_val)
 306 {
 307         struct symbol *sym;
 308         int i;
 309
 310         for_all_symbols(i, sym) {
 311                 if (sym_get_type(sym) == S_TRISTATE &&
 312                     sym->def[S_DEF_USER].tri == old_val)
 313                         sym->def[S_DEF_USER].tri = new_val;
 314         }
 315         sym_clear_all_valid();
 316 }
 317
 318 static int conf_askvalue(struct symbol *sym, const char *def)
 319 {
 320         if (!sym_has_value(sym))
 321                 printf("(NEW) ");
 322
 323         line[0] = '\n';
 324         line[1] = 0;
 325
 326         if (!sym_is_changeable(sym)) {
 327                 printf("%s\n", def);
 328                 line[0] = '\n';
 329                 line[1] = 0;
 330                 return 0;
 331         }
 332
 333         switch (input_mode) {
 334         case oldconfig:
 335         case syncconfig:
 336                 if (sym_has_value(sym)) {
 337                         printf("%s\n", def);
 338                         return 0;
 339                 }
 340                 /* fall through */
 341         default:
 342                 fflush(stdout);
 343                 xfgets(line, sizeof(line), stdin);
 344                 break;
 345         }
 346
 347         return 1;
 348 }
 349
 350 static int conf_string(struct menu *menu)
 351 {
 352         struct symbol *sym = menu->sym;
 353         const char *def;
 354
 355         while (1) {
 356                 printf("%*s%s ", indent - 1, "", menu->prompt->text);
 357                 printf("(%s) ", sym->name);
 358                 def = sym_get_string_value(sym);
 359                 if (def)
 360                         printf("[%s] ", def);
 361                 if (!conf_askvalue(sym, def))
 362                         return 0;
 363                 switch (line[0]) {
 364                 case '\n':
 365                         break;
 366                 case '?':
 367                         /* print help */
 368                         if (line[1] == '\n') {
 369                                 print_help(menu);
 370                                 def = NULL;
 371                                 break;
 372                         }
 373                         /* fall through */
 374                 default:
 375                         line[strlen(line)-1] = 0;
 376                         def = line;
 377                 }
 378                 if (def && sym_set_string_value(sym, def))
 379                         return 0;
 380         }
 381 }
 382
 383 static int conf_sym(struct menu *menu)
 384 {
 385         struct symbol *sym = menu->sym;
 386         tristate oldval, newval;
 387
 388         while (1) {
 389                 printf("%*s%s ", indent - 1, "", menu->prompt->text);
 390                 if (sym->name)
 391                         printf("(%s) ", sym->name);
 392                 putchar('[');
 393                 oldval = sym_get_tristate_value(sym);
 394                 switch (oldval) {
 395                 case no:
 396                         putchar('N');
 397                         break;
 398                 case mod:
 399                         putchar('M');
 400                         break;
 401                 case yes:
 402                         putchar('Y');
 403                         break;
 404                 }
 405                 if (oldval != no && sym_tristate_within_range(sym, no))
 406                         printf("/n");
 407                 if (oldval != mod && sym_tristate_within_range(sym, mod))
 408                         printf("/m");
 409                 if (oldval != yes && sym_tristate_within_range(sym, yes))
 410                         printf("/y");
 411                 printf("/?] ");
 412                 if (!conf_askvalue(sym, sym_get_string_value(sym)))
 413                         return 0;
 414                 strip(line);
 415
 416                 switch (line[0]) {
 417                 case 'n':
 418                 case 'N':
 419                         newval = no;
 420                         if (!line[1] || !strcmp(&line[1], "o"))
 421                                 break;
 422                         continue;
 423                 case 'm':
 424                 case 'M':
 425                         newval = mod;
 426                         if (!line[1])
 427                                 break;
 428                         continue;
 429                 case 'y':
 430                 case 'Y':
 431                         newval = yes;
 432                         if (!line[1] || !strcmp(&line[1], "es"))
 433                                 break;
 434                         continue;
 435                 case 0:
 436                         newval = oldval;
 437                         break;
 438                 case '?':
 439                         goto help;
 440                 default:
 441                         continue;
 442                 }
 443                 if (sym_set_tristate_value(sym, newval))
 444                         return 0;
 445 help:
 446                 print_help(menu);
 447         }
 448 }
 449
 450 static int conf_choice(struct menu *menu)
 451 {
 452         struct symbol *sym, *def_sym;
 453         struct menu *child;
 454         bool is_new;
 455
 456         sym = menu->sym;
 457         is_new = !sym_has_value(sym);
 458         if (sym_is_changeable(sym)) {
 459                 conf_sym(menu);
 460                 sym_calc_value(sym);
 461                 switch (sym_get_tristate_value(sym)) {
 462                 case no:
 463                         return 1;
 464                 case mod:
 465                         return 0;
 466                 case yes:
 467                         break;
 468                 }
 469         } else {
 470                 switch (sym_get_tristate_value(sym)) {
 471                 case no:
 472                         return 1;
 473                 case mod:
 474                         printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 475                         return 0;
 476                 case yes:
 477                         break;
 478                 }
 479         }
 480
 481         while (1) {
 482                 int cnt, def;
 483
 484                 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 485                 def_sym = sym_get_choice_value(sym);
 486                 cnt = def = 0;
 487                 line[0] = 0;
 488                 for (child = menu->list; child; child = child->next) {
 489                         if (!menu_is_visible(child))
 490                                 continue;
 491                         if (!child->sym) {
 492                                 printf("%*c %s\n", indent, '*', menu_get_prompt(child));
 493                                 continue;
 494                         }
 495                         cnt++;
 496                         if (child->sym == def_sym) {
 497                                 def = cnt;
 498                                 printf("%*c", indent, '>');
 499                         } else
 500                                 printf("%*c", indent, ' ');
 501                         printf(" %d. %s", cnt, menu_get_prompt(child));
 502                         if (child->sym->name)
 503                                 printf(" (%s)", child->sym->name);
 504                         if (!sym_has_value(child->sym))
 505                                 printf(" (NEW)");
 506                         printf("\n");
 507                 }
 508                 printf("%*schoice", indent - 1, "");
 509                 if (cnt == 1) {
 510                         printf("[1]: 1\n");
 511                         goto conf_childs;
 512                 }
 513                 printf("[1-%d?]: ", cnt);
 514                 switch (input_mode) {
 515                 case oldconfig:
 516                 case syncconfig:
 517                         if (!is_new) {
 518                                 cnt = def;
 519                                 printf("%d\n", cnt);
 520                                 break;
 521                         }
 522                         /* fall through */
 523                 case oldaskconfig:
 524                         fflush(stdout);
 525                         xfgets(line, sizeof(line), stdin);
 526                         strip(line);
 527                         if (line[0] == '?') {
 528                                 print_help(menu);
 529                                 continue;
 530                         }
 531                         if (!line[0])
 532                                 cnt = def;
 533                         else if (isdigit(line[0]))
 534                                 cnt = atoi(line);
 535                         else
 536                                 continue;
 537                         break;
 538                 default:
 539                         break;
 540                 }
 541
 542         conf_childs:
 543                 for (child = menu->list; child; child = child->next) {
 544                         if (!child->sym || !menu_is_visible(child))
 545                                 continue;
 546                         if (!--cnt)
 547                                 break;
 548                 }
 549                 if (!child)
 550                         continue;
 551                 if (line[0] && line[strlen(line) - 1] == '?') {
 552                         print_help(child);
 553                         continue;
 554                 }
 555                 sym_set_tristate_value(child->sym, yes);
 556                 for (child = child->list; child; child = child->next) {
 557                         indent += 2;
 558                         conf(child);
 559                         indent -= 2;
 560                 }
 561                 return 1;
 562         }
 563 }
 564
 565 static void conf(struct menu *menu)
 566 {
 567         struct symbol *sym;
 568         struct property *prop;
 569         struct menu *child;
 570
 571         if (!menu_is_visible(menu))
 572                 return;
 573
 574         sym = menu->sym;
 575         prop = menu->prompt;
 576         if (prop) {
 577                 const char *prompt;
 578
 579                 switch (prop->type) {
 580                 case P_MENU:
 581                         /*
 582                          * Except in oldaskconfig mode, we show only menus that
 583                          * contain new symbols.
 584                          */
 585                         if (input_mode != oldaskconfig && rootEntry != menu) {
 586                                 check_conf(menu);
 587                                 return;
 588                         }
 589                         /* fall through */
 590                 case P_COMMENT:
 591                         prompt = menu_get_prompt(menu);
 592                         if (prompt)
 593                                 printf("%*c\n%*c %s\n%*c\n",
 594                                         indent, '*',
 595                                         indent, '*', prompt,
 596                                         indent, '*');
 597                 default:
 598                         ;
 599                 }
 600         }
 601
 602         if (!sym)
 603                 goto conf_childs;
 604
 605         if (sym_is_choice(sym)) {
 606                 conf_choice(menu);
 607                 if (sym->curr.tri != mod)
 608                         return;
 609                 goto conf_childs;
 610         }
 611
 612         switch (sym->type) {
 613         case S_INT:
 614         case S_HEX:
 615         case S_STRING:
 616                 conf_string(menu);
 617                 break;
 618         default:
 619                 conf_sym(menu);
 620                 break;
 621         }
 622
 623 conf_childs:
 624         if (sym)
 625                 indent += 2;
 626         for (child = menu->list; child; child = child->next)
 627                 conf(child);
 628         if (sym)
 629                 indent -= 2;
 630 }
 631
 632 static void check_conf(struct menu *menu)
 633 {
 634         struct symbol *sym;
 635         struct menu *child;
 636
 637         if (!menu_is_visible(menu))
 638                 return;
 639
 640         sym = menu->sym;
 641         if (sym && !sym_has_value(sym) &&
 642             (sym_is_changeable(sym) ||
 643              (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes))) {
 644
 645                 switch (input_mode) {
 646                 case listnewconfig:
 647                         if (sym->name)
 648                                 print_symbol_for_listconfig(sym);
 649                         break;
 650                 case helpnewconfig:
 651                         printf("-----\n");
 652                         print_help(menu);
 653                         printf("-----\n");
 654                         break;
 655                 default:
 656                         if (!conf_cnt++)
 657                                 printf("*\n* Restart config...\n*\n");
 658                         rootEntry = menu_get_parent_menu(menu);
 659                         conf(rootEntry);
 660                         break;
 661                 }
 662         }
 663
 664         for (child = menu->list; child; child = child->next)
 665                 check_conf(child);
 666 }
 667
 668 static const struct option long_opts[] = {
 669         {"help",          no_argument,       NULL,            'h'},
 670         {"silent",        no_argument,       NULL,            's'},
 671         {"oldaskconfig",  no_argument,       &input_mode_opt, oldaskconfig},
 672         {"oldconfig",     no_argument,       &input_mode_opt, oldconfig},
 673         {"syncconfig",    no_argument,       &input_mode_opt, syncconfig},
 674         {"defconfig",     required_argument, &input_mode_opt, defconfig},
 675         {"savedefconfig", required_argument, &input_mode_opt, savedefconfig},
 676         {"allnoconfig",   no_argument,       &input_mode_opt, allnoconfig},
 677         {"allyesconfig",  no_argument,       &input_mode_opt, allyesconfig},
 678         {"allmodconfig",  no_argument,       &input_mode_opt, allmodconfig},
 679         {"alldefconfig",  no_argument,       &input_mode_opt, alldefconfig},
 680         {"randconfig",    no_argument,       &input_mode_opt, randconfig},
 681         {"listnewconfig", no_argument,       &input_mode_opt, listnewconfig},
 682         {"helpnewconfig", no_argument,       &input_mode_opt, helpnewconfig},
 683         {"olddefconfig",  no_argument,       &input_mode_opt, olddefconfig},
 684         {"yes2modconfig", no_argument,       &input_mode_opt, yes2modconfig},
 685         {"mod2yesconfig", no_argument,       &input_mode_opt, mod2yesconfig},
 686         {"mod2noconfig",  no_argument,       &input_mode_opt, mod2noconfig},
 687         {"fatalrecursive",no_argument,       &input_mode_opt, fatalrecursive},
 688         {NULL, 0, NULL, 0}
 689 };
 690
 691 static void conf_usage(const char *progname)
 692 {
 693         printf("Usage: %s [options] <kconfig-file>\n", progname);
 694         printf("\n");
 695         printf("Generic options:\n");
 696         printf("  -h, --help              Print this message and exit.\n");
 697         printf("  -r <file>               Read <file> as input.\n");
 698         printf("  -s, --silent            Do not print log.\n");
 699         printf("  -w <file>               Write config to <file>.\n");
 700         printf("  --fatalrecursive        Treat recursive dependency as error.\n");
 701         printf("\n");
 702         printf("Mode options:\n");
 703         printf("  --listnewconfig         List new options\n");
 704         printf("  --helpnewconfig         List new options and help text\n");
 705         printf("  --oldaskconfig          Start a new configuration using a line-oriented program\n");
 706         printf("  --oldconfig             Update a configuration using a provided .config as base\n");
 707         printf("  --syncconfig            Similar to oldconfig but generates configuration in\n"
 708                "                          include/{generated/,config/}\n");
 709         printf("  --olddefconfig          Same as oldconfig but sets new symbols to their default value\n");
 710         printf("  --defconfig <file>      New config with default defined in <file>\n");
 711         printf("  --savedefconfig <file>  Save the minimal current configuration to <file>\n");
 712         printf("  --allnoconfig           New config where all options are answered with no\n");
 713         printf("  --allyesconfig          New config where all options are answered with yes\n");
 714         printf("  --allmodconfig          New config where all options are answered with mod\n");
 715         printf("  --alldefconfig          New config with all symbols set to default\n");
 716         printf("  --randconfig            New config with random answer to all options\n");
 717         printf("  --yes2modconfig         Change answers from yes to mod if possible\n");
 718         printf("  --mod2yesconfig         Change answers from mod to yes if possible\n");
 719         printf("  --mod2noconfig          Change answers from mod to no if possible\n");
 720         printf("  (If none of the above is given, --oldaskconfig is the default)\n");
 721 }
 722
 723 int main(int ac, char **av)
 724 {
 725         const char *progname = av[0];
 726         int opt;
 727         const char *name, *defconfig_file = NULL /* gcc uninit */;
 728         const char *input_file = NULL, *output_file = NULL;
 729         int no_conf_write = 0;
 730
 731         tty_stdio = isatty(0) && isatty(1);
 732
 733         while ((opt = getopt_long(ac, av, "hr:w:s", long_opts, NULL)) != -1) {
 734                 switch (opt) {
 735                 case 'h':
 736                         conf_usage(progname);
 737                         exit(1);
 738                         break;
 739                 case 'r':
 740                         input_file = optarg;
 741                         break;
 742                 case 's':
 743                         conf_set_message_callback(NULL);
 744                         break;
 745                 case 'w':
 746                         output_file = optarg;
 747                         break;
 748                 case 0:
 749                         switch (input_mode_opt) {
 750                         case syncconfig:
 751                                 /*
 752                                  * syncconfig is invoked during the build stage.
 753                                  * Suppress distracting
 754                                  *   "configuration written to ..."
 755                                  */
 756                                 conf_set_message_callback(NULL);
 757                                 sync_kconfig = 1;
 758                                 break;
 759                         case defconfig:
 760                         case savedefconfig:
 761                                 defconfig_file = optarg;
 762                                 break;
 763                         case randconfig:
 764                                 set_randconfig_seed();
 765                                 break;
 766                         case fatalrecursive:
 767                                 recursive_is_error = 1;
 768                                 continue;
 769                         default:
 770                                 break;
 771                         }
 772                         input_mode = input_mode_opt;
 773                 default:
 774                         break;
 775                 }
 776         }
 777         if (ac == optind) {
 778                 fprintf(stderr, "%s: Kconfig file missing\n", av[0]);
 779                 conf_usage(progname);
 780                 exit(1);
 781         }
 782         conf_parse(av[optind]);
 783         //zconfdump(stdout);
 784
 785         switch (input_mode) {
 786         case defconfig:
 787                 if (conf_read(defconfig_file)) {
 788                         fprintf(stderr,
 789                                 "***\n"
 790                                   "*** Can't find default configuration \"%s\"!\n"
 791                                   "***\n",
 792                                 defconfig_file);
 793                         exit(1);
 794                 }
 795                 break;
 796         case savedefconfig:
 797         case syncconfig:
 798         case oldaskconfig:
 799         case oldconfig:
 800         case listnewconfig:
 801         case helpnewconfig:
 802         case olddefconfig:
 803         case yes2modconfig:
 804         case mod2yesconfig:
 805         case mod2noconfig:
 806         case allnoconfig:
 807         case allyesconfig:
 808         case allmodconfig:
 809         case alldefconfig:
 810         case randconfig:
 811                 conf_read(input_file);
 812                 break;
 813         default:
 814                 break;
 815         }
 816
 817         if (sync_kconfig) {
 818                 name = getenv("KCONFIG_NOSILENTUPDATE");
 819                 if (name && *name) {
 820                         if (conf_get_changed()) {
 821                                 fprintf(stderr,
 822                                         "\n*** The configuration requires explicit update.\n\n");
 823                                 return 1;
 824                         }
 825                         no_conf_write = 1;
 826                 }
 827         }
 828
 829         switch (input_mode) {
 830         case allnoconfig:
 831                 conf_set_all_new_symbols(def_no);
 832                 break;
 833         case allyesconfig:
 834                 conf_set_all_new_symbols(def_yes);
 835                 break;
 836         case allmodconfig:
 837                 conf_set_all_new_symbols(def_mod);
 838                 break;
 839         case alldefconfig:
 840                 conf_set_all_new_symbols(def_default);
 841                 break;
 842         case randconfig:
 843                 /* Really nothing to do in this loop */
 844                 while (conf_set_all_new_symbols(def_random)) ;
 845                 break;
 846         case defconfig:
 847                 conf_set_all_new_symbols(def_default);
 848                 break;
 849         case savedefconfig:
 850                 break;
 851         case yes2modconfig:
 852                 conf_rewrite_tristates(yes, mod);
 853                 break;
 854         case mod2yesconfig:
 855                 conf_rewrite_tristates(mod, yes);
 856                 break;
 857         case mod2noconfig:
 858                 conf_rewrite_tristates(mod, no);
 859                 break;
 860         case oldaskconfig:
 861                 rootEntry = &rootmenu;
 862                 conf(&rootmenu);
 863                 input_mode = oldconfig;
 864                 /* fall through */
 865         case oldconfig:
 866         case listnewconfig:
 867         case helpnewconfig:
 868         case syncconfig:
 869                 /* Update until a loop caused no more changes */
 870                 do {
 871                         conf_cnt = 0;
 872                         check_conf(&rootmenu);
 873                 } while (conf_cnt);
 874                 break;
 875         case olddefconfig:
 876         default:
 877                 break;
 878         }
 879
 880         if (input_mode == savedefconfig) {
 881                 if (conf_write_defconfig(defconfig_file)) {
 882                         fprintf(stderr, "n*** Error while saving defconfig to: %s\n\n",
 883                                 defconfig_file);
 884                         return 1;
 885                 }
 886         } else if (input_mode != listnewconfig && input_mode != helpnewconfig) {
 887                 if ((output_file || !no_conf_write) &&
 888                     conf_write(output_file)) {
 889                         fprintf(stderr, "\n*** Error during writing of the configuration.\n\n");
 890                         exit(1);
 891                 }
 892
 893                 /*
 894                  * Create auto.conf if it does not exist.
 895                  * This prevents GNU Make 4.1 or older from emitting
 896                  * "include/config/auto.conf: No such file or directory"
 897                  * in the top-level Makefile
 898                  *
 899                  * syncconfig always creates or updates auto.conf because it is
 900                  * used during the build.
 901                  */
 902                 if (conf_write_autoconf(sync_kconfig) && sync_kconfig) {
 903                         fprintf(stderr,
 904                                 "\n*** Error during sync of the configuration.\n\n");
 905                         return 1;
 906                 }
 907         }
 908         return 0;
 909 }