scripts/kconfig/conf.c

   1 // SPDX-License-Identifier: GPL-2.0
   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 };
  39 static enum input_mode input_mode = oldaskconfig;
  40 static int input_mode_opt;
  41 static int indent = 1;
  42 static int tty_stdio;
  43 static int sync_kconfig;
  44 static int conf_cnt;
  45 static char line[PATH_MAX];
  46 static struct menu *rootEntry;
  47
  48 static void print_help(struct menu *menu)
  49 {
  50         struct gstr help = str_new();
  51
  52         menu_get_ext_help(menu, &help);
  53
  54         printf("\n%s\n", str_get(&help));
  55         str_free(&help);
  56 }
  57
  58 static void strip(char *str)
  59 {
  60         char *p = str;
  61         int l;
  62
  63         while ((isspace(*p)))
  64                 p++;
  65         l = strlen(p);
  66         if (p != str)
  67                 memmove(str, p, l + 1);
  68         if (!l)
  69                 return;
  70         p = str + l - 1;
  71         while ((isspace(*p)))
  72                 *p-- = 0;
  73 }
  74
  75 /* Helper function to facilitate fgets() by Jean Sacren. */
  76 static void xfgets(char *str, int size, FILE *in)
  77 {
  78         if (!fgets(str, size, in))
  79                 fprintf(stderr, "\nError in reading or end of file.\n");
  80
  81         if (!tty_stdio)
  82                 printf("%s", str);
  83 }
  84
  85 static void set_randconfig_seed(void)
  86 {
  87         unsigned int seed;
  88         char *env;
  89         bool seed_set = false;
  90
  91         env = getenv("KCONFIG_SEED");
  92         if (env && *env) {
  93                 char *endp;
  94
  95                 seed = strtol(env, &endp, 0);
  96                 if (*endp == '\0')
  97                         seed_set = true;
  98         }
  99
 100         if (!seed_set) {
 101                 struct timeval now;
 102
 103                 /*
 104                  * Use microseconds derived seed, compensate for systems where it may
 105                  * be zero.
 106                  */
 107                 gettimeofday(&now, NULL);
 108                 seed = (now.tv_sec + 1) * (now.tv_usec + 1);
 109         }
 110
 111         printf("KCONFIG_SEED=0x%X\n", seed);
 112         srand(seed);
 113 }
 114
 115 static bool randomize_choice_values(struct symbol *csym)
 116 {
 117         struct property *prop;
 118         struct symbol *sym;
 119         struct expr *e;
 120         int cnt, def;
 121
 122         /*
 123          * If choice is mod then we may have more items selected
 124          * and if no then no-one.
 125          * In both cases stop.
 126          */
 127         if (csym->curr.tri != yes)
 128                 return false;
 129
 130         prop = sym_get_choice_prop(csym);
 131
 132         /* count entries in choice block */
 133         cnt = 0;
 134         expr_list_for_each_sym(prop->expr, e, sym)
 135                 cnt++;
 136
 137         /*
 138          * find a random value and set it to yes,
 139          * set the rest to no so we have only one set
 140          */
 141         def = rand() % cnt;
 142
 143         cnt = 0;
 144         expr_list_for_each_sym(prop->expr, e, sym) {
 145                 if (def == cnt++) {
 146                         sym->def[S_DEF_USER].tri = yes;
 147                         csym->def[S_DEF_USER].val = sym;
 148                 } else {
 149                         sym->def[S_DEF_USER].tri = no;
 150                 }
 151                 sym->flags |= SYMBOL_DEF_USER;
 152                 /* clear VALID to get value calculated */
 153                 sym->flags &= ~SYMBOL_VALID;
 154         }
 155         csym->flags |= SYMBOL_DEF_USER;
 156         /* clear VALID to get value calculated */
 157         csym->flags &= ~SYMBOL_VALID;
 158
 159         return true;
 160 }
 161
 162 enum conf_def_mode {
 163         def_default,
 164         def_yes,
 165         def_mod,
 166         def_y2m,
 167         def_m2y,
 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         for_all_symbols(i, sym) {
 231                 if (sym_has_value(sym) || sym->flags & SYMBOL_VALID)
 232                         continue;
 233                 switch (sym_get_type(sym)) {
 234                 case S_BOOLEAN:
 235                 case S_TRISTATE:
 236                         has_changed = true;
 237                         switch (mode) {
 238                         case def_yes:
 239                                 sym->def[S_DEF_USER].tri = yes;
 240                                 break;
 241                         case def_mod:
 242                                 sym->def[S_DEF_USER].tri = mod;
 243                                 break;
 244                         case def_no:
 245                                 sym->def[S_DEF_USER].tri = no;
 246                                 break;
 247                         case def_random:
 248                                 sym->def[S_DEF_USER].tri = no;
 249                                 cnt = rand() % 100;
 250                                 if (sym->type == S_TRISTATE) {
 251                                         if (cnt < pty)
 252                                                 sym->def[S_DEF_USER].tri = yes;
 253                                         else if (cnt < pty + ptm)
 254                                                 sym->def[S_DEF_USER].tri = mod;
 255                                 } else if (cnt < pby)
 256                                         sym->def[S_DEF_USER].tri = yes;
 257                                 break;
 258                         default:
 259                                 continue;
 260                         }
 261                         if (!(sym_is_choice(sym) && mode == def_random))
 262                                 sym->flags |= SYMBOL_DEF_USER;
 263                         break;
 264                 default:
 265                         break;
 266                 }
 267
 268         }
 269
 270         sym_clear_all_valid();
 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_mod_or_yes(enum conf_def_mode mode)
 306 {
 307         struct symbol *sym;
 308         int i;
 309         tristate old_val = (mode == def_y2m) ? yes : mod;
 310         tristate new_val = (mode == def_y2m) ? mod : yes;
 311
 312         for_all_symbols(i, sym) {
 313                 if (sym_get_type(sym) == S_TRISTATE &&
 314                     sym->def[S_DEF_USER].tri == old_val)
 315                         sym->def[S_DEF_USER].tri = new_val;
 316         }
 317         sym_clear_all_valid();
 318 }
 319
 320 static int conf_askvalue(struct symbol *sym, const char *def)
 321 {
 322         if (!sym_has_value(sym))
 323                 printf("(NEW) ");
 324
 325         line[0] = '\n';
 326         line[1] = 0;
 327
 328         if (!sym_is_changeable(sym)) {
 329                 printf("%s\n", def);
 330                 line[0] = '\n';
 331                 line[1] = 0;
 332                 return 0;
 333         }
 334
 335         switch (input_mode) {
 336         case oldconfig:
 337         case syncconfig:
 338                 if (sym_has_value(sym)) {
 339                         printf("%s\n", def);
 340                         return 0;
 341                 }
 342                 /* fall through */
 343         default:
 344                 fflush(stdout);
 345                 xfgets(line, sizeof(line), stdin);
 346                 break;
 347         }
 348
 349         return 1;
 350 }
 351
 352 static int conf_string(struct menu *menu)
 353 {
 354         struct symbol *sym = menu->sym;
 355         const char *def;
 356
 357         while (1) {
 358                 printf("%*s%s ", indent - 1, "", menu->prompt->text);
 359                 printf("(%s) ", sym->name);
 360                 def = sym_get_string_value(sym);
 361                 if (def)
 362                         printf("[%s] ", def);
 363                 if (!conf_askvalue(sym, def))
 364                         return 0;
 365                 switch (line[0]) {
 366                 case '\n':
 367                         break;
 368                 case '?':
 369                         /* print help */
 370                         if (line[1] == '\n') {
 371                                 print_help(menu);
 372                                 def = NULL;
 373                                 break;
 374                         }
 375                         /* fall through */
 376                 default:
 377                         line[strlen(line)-1] = 0;
 378                         def = line;
 379                 }
 380                 if (def && sym_set_string_value(sym, def))
 381                         return 0;
 382         }
 383 }
 384
 385 static int conf_sym(struct menu *menu)
 386 {
 387         struct symbol *sym = menu->sym;
 388         tristate oldval, newval;
 389
 390         while (1) {
 391                 printf("%*s%s ", indent - 1, "", menu->prompt->text);
 392                 if (sym->name)
 393                         printf("(%s) ", sym->name);
 394                 putchar('[');
 395                 oldval = sym_get_tristate_value(sym);
 396                 switch (oldval) {
 397                 case no:
 398                         putchar('N');
 399                         break;
 400                 case mod:
 401                         putchar('M');
 402                         break;
 403                 case yes:
 404                         putchar('Y');
 405                         break;
 406                 }
 407                 if (oldval != no && sym_tristate_within_range(sym, no))
 408                         printf("/n");
 409                 if (oldval != mod && sym_tristate_within_range(sym, mod))
 410                         printf("/m");
 411                 if (oldval != yes && sym_tristate_within_range(sym, yes))
 412                         printf("/y");
 413                 printf("/?] ");
 414                 if (!conf_askvalue(sym, sym_get_string_value(sym)))
 415                         return 0;
 416                 strip(line);
 417
 418                 switch (line[0]) {
 419                 case 'n':
 420                 case 'N':
 421                         newval = no;
 422                         if (!line[1] || !strcmp(&line[1], "o"))
 423                                 break;
 424                         continue;
 425                 case 'm':
 426                 case 'M':
 427                         newval = mod;
 428                         if (!line[1])
 429                                 break;
 430                         continue;
 431                 case 'y':
 432                 case 'Y':
 433                         newval = yes;
 434                         if (!line[1] || !strcmp(&line[1], "es"))
 435                                 break;
 436                         continue;
 437                 case 0:
 438                         newval = oldval;
 439                         break;
 440                 case '?':
 441                         goto help;
 442                 default:
 443                         continue;
 444                 }
 445                 if (sym_set_tristate_value(sym, newval))
 446                         return 0;
 447 help:
 448                 print_help(menu);
 449         }
 450 }
 451
 452 static int conf_choice(struct menu *menu)
 453 {
 454         struct symbol *sym, *def_sym;
 455         struct menu *child;
 456         bool is_new;
 457
 458         sym = menu->sym;
 459         is_new = !sym_has_value(sym);
 460         if (sym_is_changeable(sym)) {
 461                 conf_sym(menu);
 462                 sym_calc_value(sym);
 463                 switch (sym_get_tristate_value(sym)) {
 464                 case no:
 465                         return 1;
 466                 case mod:
 467                         return 0;
 468                 case yes:
 469                         break;
 470                 }
 471         } else {
 472                 switch (sym_get_tristate_value(sym)) {
 473                 case no:
 474                         return 1;
 475                 case mod:
 476                         printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 477                         return 0;
 478                 case yes:
 479                         break;
 480                 }
 481         }
 482
 483         while (1) {
 484                 int cnt, def;
 485
 486                 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 487                 def_sym = sym_get_choice_value(sym);
 488                 cnt = def = 0;
 489                 line[0] = 0;
 490                 for (child = menu->list; child; child = child->next) {
 491                         if (!menu_is_visible(child))
 492                                 continue;
 493                         if (!child->sym) {
 494                                 printf("%*c %s\n", indent, '*', menu_get_prompt(child));
 495                                 continue;
 496                         }
 497                         cnt++;
 498                         if (child->sym == def_sym) {
 499                                 def = cnt;
 500                                 printf("%*c", indent, '>');
 501                         } else
 502                                 printf("%*c", indent, ' ');
 503                         printf(" %d. %s", cnt, menu_get_prompt(child));
 504                         if (child->sym->name)
 505                                 printf(" (%s)", child->sym->name);
 506                         if (!sym_has_value(child->sym))
 507                                 printf(" (NEW)");
 508                         printf("\n");
 509                 }
 510                 printf("%*schoice", indent - 1, "");
 511                 if (cnt == 1) {
 512                         printf("[1]: 1\n");
 513                         goto conf_childs;
 514                 }
 515                 printf("[1-%d?]: ", cnt);
 516                 switch (input_mode) {
 517                 case oldconfig:
 518                 case syncconfig:
 519                         if (!is_new) {
 520                                 cnt = def;
 521                                 printf("%d\n", cnt);
 522                                 break;
 523                         }
 524                         /* fall through */
 525                 case oldaskconfig:
 526                         fflush(stdout);
 527                         xfgets(line, sizeof(line), stdin);
 528                         strip(line);
 529                         if (line[0] == '?') {
 530                                 print_help(menu);
 531                                 continue;
 532                         }
 533                         if (!line[0])
 534                                 cnt = def;
 535                         else if (isdigit(line[0]))
 536                                 cnt = atoi(line);
 537                         else
 538                                 continue;
 539                         break;
 540                 default:
 541                         break;
 542                 }
 543
 544         conf_childs:
 545                 for (child = menu->list; child; child = child->next) {
 546                         if (!child->sym || !menu_is_visible(child))
 547                                 continue;
 548                         if (!--cnt)
 549                                 break;
 550                 }
 551                 if (!child)
 552                         continue;
 553                 if (line[0] && line[strlen(line) - 1] == '?') {
 554                         print_help(child);
 555                         continue;
 556                 }
 557                 sym_set_choice_value(sym, child->sym);
 558                 for (child = child->list; child; child = child->next) {
 559                         indent += 2;
 560                         conf(child);
 561                         indent -= 2;
 562                 }
 563                 return 1;
 564         }
 565 }
 566
 567 static void conf(struct menu *menu)
 568 {
 569         struct symbol *sym;
 570         struct property *prop;
 571         struct menu *child;
 572
 573         if (!menu_is_visible(menu))
 574                 return;
 575
 576         sym = menu->sym;
 577         prop = menu->prompt;
 578         if (prop) {
 579                 const char *prompt;
 580
 581                 switch (prop->type) {
 582                 case P_MENU:
 583                         /*
 584                          * Except in oldaskconfig mode, we show only menus that
 585                          * contain new symbols.
 586                          */
 587                         if (input_mode != oldaskconfig && rootEntry != menu) {
 588                                 check_conf(menu);
 589                                 return;
 590                         }
 591                         /* fall through */
 592                 case P_COMMENT:
 593                         prompt = menu_get_prompt(menu);
 594                         if (prompt)
 595                                 printf("%*c\n%*c %s\n%*c\n",
 596                                         indent, '*',
 597                                         indent, '*', prompt,
 598                                         indent, '*');
 599                 default:
 600                         ;
 601                 }
 602         }
 603
 604         if (!sym)
 605                 goto conf_childs;
 606
 607         if (sym_is_choice(sym)) {
 608                 conf_choice(menu);
 609                 if (sym->curr.tri != mod)
 610                         return;
 611                 goto conf_childs;
 612         }
 613
 614         switch (sym->type) {
 615         case S_INT:
 616         case S_HEX:
 617         case S_STRING:
 618                 conf_string(menu);
 619                 break;
 620         default:
 621                 conf_sym(menu);
 622                 break;
 623         }
 624
 625 conf_childs:
 626         if (sym)
 627                 indent += 2;
 628         for (child = menu->list; child; child = child->next)
 629                 conf(child);
 630         if (sym)
 631                 indent -= 2;
 632 }
 633
 634 static void check_conf(struct menu *menu)
 635 {
 636         struct symbol *sym;
 637         struct menu *child;
 638
 639         if (!menu_is_visible(menu))
 640                 return;
 641
 642         sym = menu->sym;
 643         if (sym && !sym_has_value(sym) &&
 644             (sym_is_changeable(sym) ||
 645              (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes))) {
 646
 647                 switch (input_mode) {
 648                 case listnewconfig:
 649                         if (sym->name) {
 650                                 const char *str;
 651
 652                                 if (sym->type == S_STRING) {
 653                                         str = sym_get_string_value(sym);
 654                                         str = sym_escape_string_value(str);
 655                                         printf("%s%s=%s\n", CONFIG_, sym->name, str);
 656                                         free((void *)str);
 657                                 } else {
 658                                         str = sym_get_string_value(sym);
 659                                         printf("%s%s=%s\n", CONFIG_, sym->name, str);
 660                                 }
 661                         }
 662                         break;
 663                 case helpnewconfig:
 664                         printf("-----\n");
 665                         print_help(menu);
 666                         printf("-----\n");
 667                         break;
 668                 default:
 669                         if (!conf_cnt++)
 670                                 printf("*\n* Restart config...\n*\n");
 671                         rootEntry = menu_get_parent_menu(menu);
 672                         conf(rootEntry);
 673                         break;
 674                 }
 675         }
 676
 677         for (child = menu->list; child; child = child->next)
 678                 check_conf(child);
 679 }
 680
 681 static const struct option long_opts[] = {
 682         {"help",          no_argument,       NULL,            'h'},
 683         {"silent",        no_argument,       NULL,            's'},
 684         {"oldaskconfig",  no_argument,       &input_mode_opt, oldaskconfig},
 685         {"oldconfig",     no_argument,       &input_mode_opt, oldconfig},
 686         {"syncconfig",    no_argument,       &input_mode_opt, syncconfig},
 687         {"defconfig",     required_argument, &input_mode_opt, defconfig},
 688         {"savedefconfig", required_argument, &input_mode_opt, savedefconfig},
 689         {"allnoconfig",   no_argument,       &input_mode_opt, allnoconfig},
 690         {"allyesconfig",  no_argument,       &input_mode_opt, allyesconfig},
 691         {"allmodconfig",  no_argument,       &input_mode_opt, allmodconfig},
 692         {"alldefconfig",  no_argument,       &input_mode_opt, alldefconfig},
 693         {"randconfig",    no_argument,       &input_mode_opt, randconfig},
 694         {"listnewconfig", no_argument,       &input_mode_opt, listnewconfig},
 695         {"helpnewconfig", no_argument,       &input_mode_opt, helpnewconfig},
 696         {"olddefconfig",  no_argument,       &input_mode_opt, olddefconfig},
 697         {"yes2modconfig", no_argument,       &input_mode_opt, yes2modconfig},
 698         {"mod2yesconfig", no_argument,       &input_mode_opt, mod2yesconfig},
 699         {NULL, 0, NULL, 0}
 700 };
 701
 702 static void conf_usage(const char *progname)
 703 {
 704         printf("Usage: %s [options] <kconfig-file>\n", progname);
 705         printf("\n");
 706         printf("Generic options:\n");
 707         printf("  -h, --help              Print this message and exit.\n");
 708         printf("  -s, --silent            Do not print log.\n");
 709         printf("\n");
 710         printf("Mode options:\n");
 711         printf("  --listnewconfig         List new options\n");
 712         printf("  --helpnewconfig         List new options and help text\n");
 713         printf("  --oldaskconfig          Start a new configuration using a line-oriented program\n");
 714         printf("  --oldconfig             Update a configuration using a provided .config as base\n");
 715         printf("  --syncconfig            Similar to oldconfig but generates configuration in\n"
 716                "                          include/{generated/,config/}\n");
 717         printf("  --olddefconfig          Same as oldconfig but sets new symbols to their default value\n");
 718         printf("  --defconfig <file>      New config with default defined in <file>\n");
 719         printf("  --savedefconfig <file>  Save the minimal current configuration to <file>\n");
 720         printf("  --allnoconfig           New config where all options are answered with no\n");
 721         printf("  --allyesconfig          New config where all options are answered with yes\n");
 722         printf("  --allmodconfig          New config where all options are answered with mod\n");
 723         printf("  --alldefconfig          New config with all symbols set to default\n");
 724         printf("  --randconfig            New config with random answer to all options\n");
 725         printf("  --yes2modconfig         Change answers from yes to mod if possible\n");
 726         printf("  --mod2yesconfig         Change answers from mod to yes if possible\n");
 727         printf("  (If none of the above is given, --oldaskconfig is the default)\n");
 728 }
 729
 730 int main(int ac, char **av)
 731 {
 732         const char *progname = av[0];
 733         int opt;
 734         const char *name, *defconfig_file = NULL /* gcc uninit */;
 735         int no_conf_write = 0;
 736
 737         tty_stdio = isatty(0) && isatty(1);
 738
 739         while ((opt = getopt_long(ac, av, "hs", long_opts, NULL)) != -1) {
 740                 switch (opt) {
 741                 case 'h':
 742                         conf_usage(progname);
 743                         exit(1);
 744                         break;
 745                 case 's':
 746                         conf_set_message_callback(NULL);
 747                         break;
 748                 case 0:
 749                         input_mode = input_mode_opt;
 750                         switch (input_mode) {
 751                         case syncconfig:
 752                                 /*
 753                                  * syncconfig is invoked during the build stage.
 754                                  * Suppress distracting
 755                                  *   "configuration written to ..."
 756                                  */
 757                                 conf_set_message_callback(NULL);
 758                                 sync_kconfig = 1;
 759                                 break;
 760                         case defconfig:
 761                         case savedefconfig:
 762                                 defconfig_file = optarg;
 763                                 break;
 764                         case randconfig:
 765                                 set_randconfig_seed();
 766                                 break;
 767                         default:
 768                                 break;
 769                         }
 770                 default:
 771                         break;
 772                 }
 773         }
 774         if (ac == optind) {
 775                 fprintf(stderr, "%s: Kconfig file missing\n", av[0]);
 776                 conf_usage(progname);
 777                 exit(1);
 778         }
 779         conf_parse(av[optind]);
 780         //zconfdump(stdout);
 781
 782         switch (input_mode) {
 783         case defconfig:
 784                 if (conf_read(defconfig_file)) {
 785                         fprintf(stderr,
 786                                 "***\n"
 787                                   "*** Can't find default configuration \"%s\"!\n"
 788                                   "***\n",
 789                                 defconfig_file);
 790                         exit(1);
 791                 }
 792                 break;
 793         case savedefconfig:
 794         case syncconfig:
 795         case oldaskconfig:
 796         case oldconfig:
 797         case listnewconfig:
 798         case helpnewconfig:
 799         case olddefconfig:
 800         case yes2modconfig:
 801         case mod2yesconfig:
 802                 conf_read(NULL);
 803                 break;
 804         case allnoconfig:
 805         case allyesconfig:
 806         case allmodconfig:
 807         case alldefconfig:
 808         case randconfig:
 809                 name = getenv("KCONFIG_ALLCONFIG");
 810                 if (!name)
 811                         break;
 812                 if ((strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) {
 813                         if (conf_read_simple(name, S_DEF_USER)) {
 814                                 fprintf(stderr,
 815                                         "*** Can't read seed configuration \"%s\"!\n",
 816                                         name);
 817                                 exit(1);
 818                         }
 819                         break;
 820                 }
 821                 switch (input_mode) {
 822                 case allnoconfig:       name = "allno.config"; break;
 823                 case allyesconfig:      name = "allyes.config"; break;
 824                 case allmodconfig:      name = "allmod.config"; break;
 825                 case alldefconfig:      name = "alldef.config"; break;
 826                 case randconfig:        name = "allrandom.config"; break;
 827                 default: break;
 828                 }
 829                 if (conf_read_simple(name, S_DEF_USER) &&
 830                     conf_read_simple("all.config", S_DEF_USER)) {
 831                         fprintf(stderr,
 832                                 "*** KCONFIG_ALLCONFIG set, but no \"%s\" or \"all.config\" file found\n",
 833                                 name);
 834                         exit(1);
 835                 }
 836                 break;
 837         default:
 838                 break;
 839         }
 840
 841         if (sync_kconfig) {
 842                 name = getenv("KCONFIG_NOSILENTUPDATE");
 843                 if (name && *name) {
 844                         if (conf_get_changed()) {
 845                                 fprintf(stderr,
 846                                         "\n*** The configuration requires explicit update.\n\n");
 847                                 return 1;
 848                         }
 849                         no_conf_write = 1;
 850                 }
 851         }
 852
 853         switch (input_mode) {
 854         case allnoconfig:
 855                 conf_set_all_new_symbols(def_no);
 856                 break;
 857         case allyesconfig:
 858                 conf_set_all_new_symbols(def_yes);
 859                 break;
 860         case allmodconfig:
 861                 conf_set_all_new_symbols(def_mod);
 862                 break;
 863         case alldefconfig:
 864                 conf_set_all_new_symbols(def_default);
 865                 break;
 866         case randconfig:
 867                 /* Really nothing to do in this loop */
 868                 while (conf_set_all_new_symbols(def_random)) ;
 869                 break;
 870         case defconfig:
 871                 conf_set_all_new_symbols(def_default);
 872                 break;
 873         case savedefconfig:
 874                 break;
 875         case yes2modconfig:
 876                 conf_rewrite_mod_or_yes(def_y2m);
 877                 break;
 878         case mod2yesconfig:
 879                 conf_rewrite_mod_or_yes(def_m2y);
 880                 break;
 881         case oldaskconfig:
 882                 rootEntry = &rootmenu;
 883                 conf(&rootmenu);
 884                 input_mode = oldconfig;
 885                 /* fall through */
 886         case oldconfig:
 887         case listnewconfig:
 888         case helpnewconfig:
 889         case syncconfig:
 890                 /* Update until a loop caused no more changes */
 891                 do {
 892                         conf_cnt = 0;
 893                         check_conf(&rootmenu);
 894                 } while (conf_cnt);
 895                 break;
 896         case olddefconfig:
 897         default:
 898                 break;
 899         }
 900
 901         if (input_mode == savedefconfig) {
 902                 if (conf_write_defconfig(defconfig_file)) {
 903                         fprintf(stderr, "n*** Error while saving defconfig to: %s\n\n",
 904                                 defconfig_file);
 905                         return 1;
 906                 }
 907         } else if (input_mode != listnewconfig && input_mode != helpnewconfig) {
 908                 if (!no_conf_write && conf_write(NULL)) {
 909                         fprintf(stderr, "\n*** Error during writing of the configuration.\n\n");
 910                         exit(1);
 911                 }
 912
 913                 /*
 914                  * Create auto.conf if it does not exist.
 915                  * This prevents GNU Make 4.1 or older from emitting
 916                  * "include/config/auto.conf: No such file or directory"
 917                  * in the top-level Makefile
 918                  *
 919                  * syncconfig always creates or updates auto.conf because it is
 920                  * used during the build.
 921                  */
 922                 if (conf_write_autoconf(sync_kconfig) && sync_kconfig) {
 923                         fprintf(stderr,
 924                                 "\n*** Error during sync of the configuration.\n\n");
 925                         return 1;
 926                 }
 927         }
 928         return 0;
 929 }