scripts/kconfig/confdata.c

   1 /*
   2  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
   3  * Released under the terms of the GNU GPL v2.0.
   4  */
   5
   6 #include <sys/stat.h>
   7 #include <ctype.h>
   8 #include <fcntl.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <time.h>
  13 #include <unistd.h>
  14
  15 #define LKC_DIRECT_LINK
  16 #include "lkc.h"
  17
  18 static void conf_warning(const char *fmt, ...)
  19         __attribute__ ((format (printf, 1, 2)));
  20
  21 static const char *conf_filename;
  22 static int conf_lineno, conf_warnings, conf_unsaved;
  23
  24 const char conf_defname[] = "arch/$ARCH/defconfig";
  25
  26 static void conf_warning(const char *fmt, ...)
  27 {
  28         va_list ap;
  29         va_start(ap, fmt);
  30         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  31         vfprintf(stderr, fmt, ap);
  32         fprintf(stderr, "\n");
  33         va_end(ap);
  34         conf_warnings++;
  35 }
  36
  37 const char *conf_get_configname(void)
  38 {
  39         char *name = getenv("KCONFIG_CONFIG");
  40
  41         return name ? name : ".config";
  42 }
  43
  44 const char *conf_get_autoconfig_name(void)
  45 {
  46         char *name = getenv("KCONFIG_AUTOCONFIG");
  47
  48         return name ? name : "include/config/auto.conf";
  49 }
  50
  51 static char *conf_expand_value(const char *in)
  52 {
  53         struct symbol *sym;
  54         const char *src;
  55         static char res_value[SYMBOL_MAXLENGTH];
  56         char *dst, name[SYMBOL_MAXLENGTH];
  57
  58         res_value[0] = 0;
  59         dst = name;
  60         while ((src = strchr(in, '$'))) {
  61                 strncat(res_value, in, src - in);
  62                 src++;
  63                 dst = name;
  64                 while (isalnum(*src) || *src == '_')
  65                         *dst++ = *src++;
  66                 *dst = 0;
  67                 sym = sym_lookup(name, 0);
  68                 sym_calc_value(sym);
  69                 strcat(res_value, sym_get_string_value(sym));
  70                 in = src;
  71         }
  72         strcat(res_value, in);
  73
  74         return res_value;
  75 }
  76
  77 char *conf_get_default_confname(void)
  78 {
  79         struct stat buf;
  80         static char fullname[PATH_MAX+1];
  81         char *env, *name;
  82
  83         name = conf_expand_value(conf_defname);
  84         env = getenv(SRCTREE);
  85         if (env) {
  86                 sprintf(fullname, "%s/%s", env, name);
  87                 if (!stat(fullname, &buf))
  88                         return fullname;
  89         }
  90         return name;
  91 }
  92
  93 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
  94 {
  95         char *p2;
  96
  97         switch (sym->type) {
  98         case S_TRISTATE:
  99                 if (p[0] == 'm') {
 100                         sym->def[def].tri = mod;
 101                         sym->flags |= def_flags;
 102                         break;
 103                 }
 104         case S_BOOLEAN:
 105                 if (p[0] == 'y') {
 106                         sym->def[def].tri = yes;
 107                         sym->flags |= def_flags;
 108                         break;
 109                 }
 110                 if (p[0] == 'n') {
 111                         sym->def[def].tri = no;
 112                         sym->flags |= def_flags;
 113                         break;
 114                 }
 115                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 116                 break;
 117         case S_OTHER:
 118                 if (*p != '"') {
 119                         for (p2 = p; *p2 && !isspace(*p2); p2++)
 120                                 ;
 121                         sym->type = S_STRING;
 122                         goto done;
 123                 }
 124         case S_STRING:
 125                 if (*p++ != '"')
 126                         break;
 127                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 128                         if (*p2 == '"') {
 129                                 *p2 = 0;
 130                                 break;
 131                         }
 132                         memmove(p2, p2 + 1, strlen(p2));
 133                 }
 134                 if (!p2) {
 135                         conf_warning("invalid string found");
 136                         return 1;
 137                 }
 138         case S_INT:
 139         case S_HEX:
 140         done:
 141                 if (sym_string_valid(sym, p)) {
 142                         sym->def[def].val = strdup(p);
 143                         sym->flags |= def_flags;
 144                 } else {
 145                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 146                         return 1;
 147                 }
 148                 break;
 149         default:
 150                 ;
 151         }
 152         return 0;
 153 }
 154
 155 int conf_read_simple(const char *name, int def)
 156 {
 157         FILE *in = NULL;
 158         char line[1024];
 159         char *p, *p2;
 160         struct symbol *sym;
 161         int i, def_flags;
 162
 163         if (name) {
 164                 in = zconf_fopen(name);
 165         } else {
 166                 struct property *prop;
 167
 168                 name = conf_get_configname();
 169                 in = zconf_fopen(name);
 170                 if (in)
 171                         goto load;
 172                 sym_add_change_count(1);
 173                 if (!sym_defconfig_list) {
 174                         if (modules_sym)
 175                                 sym_calc_value(modules_sym);
 176                         return 1;
 177                 }
 178
 179                 for_all_defaults(sym_defconfig_list, prop) {
 180                         if (expr_calc_value(prop->visible.expr) == no ||
 181                             prop->expr->type != E_SYMBOL)
 182                                 continue;
 183                         name = conf_expand_value(prop->expr->left.sym->name);
 184                         in = zconf_fopen(name);
 185                         if (in) {
 186                                 printf(_("#\n"
 187                                          "# using defaults found in %s\n"
 188                                          "#\n"), name);
 189                                 goto load;
 190                         }
 191                 }
 192         }
 193         if (!in)
 194                 return 1;
 195
 196 load:
 197         conf_filename = name;
 198         conf_lineno = 0;
 199         conf_warnings = 0;
 200         conf_unsaved = 0;
 201
 202         def_flags = SYMBOL_DEF << def;
 203         for_all_symbols(i, sym) {
 204                 sym->flags |= SYMBOL_CHANGED;
 205                 sym->flags &= ~(def_flags|SYMBOL_VALID);
 206                 if (sym_is_choice(sym))
 207                         sym->flags |= def_flags;
 208                 switch (sym->type) {
 209                 case S_INT:
 210                 case S_HEX:
 211                 case S_STRING:
 212                         if (sym->def[def].val)
 213                                 free(sym->def[def].val);
 214                 default:
 215                         sym->def[def].val = NULL;
 216                         sym->def[def].tri = no;
 217                 }
 218         }
 219
 220         while (fgets(line, sizeof(line), in)) {
 221                 conf_lineno++;
 222                 sym = NULL;
 223                 switch (line[0]) {
 224                 case '#':
 225                         if (memcmp(line + 2, "CONFIG_", 7))
 226                                 continue;
 227                         p = strchr(line + 9, ' ');
 228                         if (!p)
 229                                 continue;
 230                         *p++ = 0;
 231                         if (strncmp(p, "is not set", 10))
 232                                 continue;
 233                         if (def == S_DEF_USER) {
 234                                 sym = sym_find(line + 9);
 235                                 if (!sym) {
 236                                         sym_add_change_count(1);
 237                                         break;
 238                                 }
 239                         } else {
 240                                 sym = sym_lookup(line + 9, 0);
 241                                 if (sym->type == S_UNKNOWN)
 242                                         sym->type = S_BOOLEAN;
 243                         }
 244                         if (sym->flags & def_flags) {
 245                                 conf_warning("override: reassigning to symbol %s", sym->name);
 246                         }
 247                         switch (sym->type) {
 248                         case S_BOOLEAN:
 249                         case S_TRISTATE:
 250                                 sym->def[def].tri = no;
 251                                 sym->flags |= def_flags;
 252                                 break;
 253                         default:
 254                                 ;
 255                         }
 256                         break;
 257                 case 'C':
 258                         if (memcmp(line, "CONFIG_", 7)) {
 259                                 conf_warning("unexpected data");
 260                                 continue;
 261                         }
 262                         p = strchr(line + 7, '=');
 263                         if (!p)
 264                                 continue;
 265                         *p++ = 0;
 266                         p2 = strchr(p, '\n');
 267                         if (p2) {
 268                                 *p2-- = 0;
 269                                 if (*p2 == '\r')
 270                                         *p2 = 0;
 271                         }
 272                         if (def == S_DEF_USER) {
 273                                 sym = sym_find(line + 7);
 274                                 if (!sym) {
 275                                         sym_add_change_count(1);
 276                                         break;
 277                                 }
 278                         } else {
 279                                 sym = sym_lookup(line + 7, 0);
 280                                 if (sym->type == S_UNKNOWN)
 281                                         sym->type = S_OTHER;
 282                         }
 283                         if (sym->flags & def_flags) {
 284                                 conf_warning("override: reassigning to symbol %s", sym->name);
 285                         }
 286                         if (conf_set_sym_val(sym, def, def_flags, p))
 287                                 continue;
 288                         break;
 289                 case '\r':
 290                 case '\n':
 291                         break;
 292                 default:
 293                         conf_warning("unexpected data");
 294                         continue;
 295                 }
 296                 if (sym && sym_is_choice_value(sym)) {
 297                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 298                         switch (sym->def[def].tri) {
 299                         case no:
 300                                 break;
 301                         case mod:
 302                                 if (cs->def[def].tri == yes) {
 303                                         conf_warning("%s creates inconsistent choice state", sym->name);
 304                                         cs->flags &= ~def_flags;
 305                                 }
 306                                 break;
 307                         case yes:
 308                                 if (cs->def[def].tri != no)
 309                                         conf_warning("override: %s changes choice state", sym->name);
 310                                 cs->def[def].val = sym;
 311                                 break;
 312                         }
 313                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
 314                 }
 315         }
 316         fclose(in);
 317
 318         if (modules_sym)
 319                 sym_calc_value(modules_sym);
 320         return 0;
 321 }
 322
 323 int conf_read(const char *name)
 324 {
 325         struct symbol *sym, *choice_sym;
 326         struct property *prop;
 327         struct expr *e;
 328         int i, flags;
 329
 330         sym_set_change_count(0);
 331
 332         if (conf_read_simple(name, S_DEF_USER))
 333                 return 1;
 334
 335         for_all_symbols(i, sym) {
 336                 sym_calc_value(sym);
 337                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 338                         goto sym_ok;
 339                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 340                         /* check that calculated value agrees with saved value */
 341                         switch (sym->type) {
 342                         case S_BOOLEAN:
 343                         case S_TRISTATE:
 344                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
 345                                         break;
 346                                 if (!sym_is_choice(sym))
 347                                         goto sym_ok;
 348                         default:
 349                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
 350                                         goto sym_ok;
 351                                 break;
 352                         }
 353                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 354                         /* no previous value and not saved */
 355                         goto sym_ok;
 356                 conf_unsaved++;
 357                 /* maybe print value in verbose mode... */
 358         sym_ok:
 359                 if (!sym_is_choice(sym))
 360                         continue;
 361                 /* The choice symbol only has a set value (and thus is not new)
 362                  * if all its visible childs have values.
 363                  */
 364                 prop = sym_get_choice_prop(sym);
 365                 flags = sym->flags;
 366                 expr_list_for_each_sym(prop->expr, e, choice_sym)
 367                         if (choice_sym->visible != no)
 368                                 flags &= choice_sym->flags;
 369                 sym->flags &= flags | ~SYMBOL_DEF_USER;
 370         }
 371
 372         for_all_symbols(i, sym) {
 373                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 374                         /* Reset values of generates values, so they'll appear
 375                          * as new, if they should become visible, but that
 376                          * doesn't quite work if the Kconfig and the saved
 377                          * configuration disagree.
 378                          */
 379                         if (sym->visible == no && !conf_unsaved)
 380                                 sym->flags &= ~SYMBOL_DEF_USER;
 381                         switch (sym->type) {
 382                         case S_STRING:
 383                         case S_INT:
 384                         case S_HEX:
 385                                 /* Reset a string value if it's out of range */
 386                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
 387                                         break;
 388                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
 389                                 conf_unsaved++;
 390                                 break;
 391                         default:
 392                                 break;
 393                         }
 394                 }
 395         }
 396
 397         sym_add_change_count(conf_warnings || conf_unsaved);
 398
 399         return 0;
 400 }
 401
 402 /* Write a S_STRING */
 403 static void conf_write_string(bool headerfile, const char *name,
 404                               const char *str, FILE *out)
 405 {
 406         int l;
 407         if (headerfile)
 408                 fprintf(out, "#define CONFIG_%s \"", name);
 409         else
 410                 fprintf(out, "CONFIG_%s=\"", name);
 411
 412         while (1) {
 413                 l = strcspn(str, "\"\\");
 414                 if (l) {
 415                         fwrite(str, l, 1, out);
 416                         str += l;
 417                 }
 418                 if (!*str)
 419                         break;
 420                 fprintf(out, "\\%c", *str++);
 421         }
 422         fputs("\"\n", out);
 423 }
 424
 425 static void conf_write_symbol(struct symbol *sym, enum symbol_type type,
 426                               FILE *out, bool write_no)
 427 {
 428         const char *str;
 429
 430         switch (type) {
 431         case S_BOOLEAN:
 432         case S_TRISTATE:
 433                 switch (sym_get_tristate_value(sym)) {
 434                 case no:
 435                         if (write_no)
 436                                 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 437                         break;
 438                 case mod:
 439                         fprintf(out, "CONFIG_%s=m\n", sym->name);
 440                         break;
 441                 case yes:
 442                         fprintf(out, "CONFIG_%s=y\n", sym->name);
 443                         break;
 444                 }
 445                 break;
 446         case S_STRING:
 447                 conf_write_string(false, sym->name, sym_get_string_value(sym), out);
 448                 break;
 449         case S_HEX:
 450         case S_INT:
 451                 str = sym_get_string_value(sym);
 452                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 453                 break;
 454         case S_OTHER:
 455         case S_UNKNOWN:
 456                 break;
 457         }
 458 }
 459
 460 int conf_write(const char *name)
 461 {
 462         FILE *out;
 463         struct symbol *sym;
 464         struct menu *menu;
 465         const char *basename;
 466         const char *str;
 467         char dirname[128], tmpname[128], newname[128];
 468         enum symbol_type type;
 469         time_t now;
 470         int use_timestamp = 1;
 471         char *env;
 472
 473         dirname[0] = 0;
 474         if (name && name[0]) {
 475                 struct stat st;
 476                 char *slash;
 477
 478                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 479                         strcpy(dirname, name);
 480                         strcat(dirname, "/");
 481                         basename = conf_get_configname();
 482                 } else if ((slash = strrchr(name, '/'))) {
 483                         int size = slash - name + 1;
 484                         memcpy(dirname, name, size);
 485                         dirname[size] = 0;
 486                         if (slash[1])
 487                                 basename = slash + 1;
 488                         else
 489                                 basename = conf_get_configname();
 490                 } else
 491                         basename = name;
 492         } else
 493                 basename = conf_get_configname();
 494
 495         sprintf(newname, "%s%s", dirname, basename);
 496         env = getenv("KCONFIG_OVERWRITECONFIG");
 497         if (!env || !*env) {
 498                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
 499                 out = fopen(tmpname, "w");
 500         } else {
 501                 *tmpname = 0;
 502                 out = fopen(newname, "w");
 503         }
 504         if (!out)
 505                 return 1;
 506
 507         sym = sym_lookup("KERNELVERSION", 0);
 508         sym_calc_value(sym);
 509         time(&now);
 510         env = getenv("KCONFIG_NOTIMESTAMP");
 511         if (env && *env)
 512                 use_timestamp = 0;
 513
 514         fprintf(out, _("#\n"
 515                        "# Automatically generated make config: don't edit\n"
 516                        "# Linux kernel version: %s\n"
 517                        "%s%s"
 518                        "#\n"),
 519                      sym_get_string_value(sym),
 520                      use_timestamp ? "# " : "",
 521                      use_timestamp ? ctime(&now) : "");
 522
 523         if (!conf_get_changed())
 524                 sym_clear_all_valid();
 525
 526         menu = rootmenu.list;
 527         while (menu) {
 528                 sym = menu->sym;
 529                 if (!sym) {
 530                         if (!menu_is_visible(menu))
 531                                 goto next;
 532                         str = menu_get_prompt(menu);
 533                         fprintf(out, "\n"
 534                                      "#\n"
 535                                      "# %s\n"
 536                                      "#\n", str);
 537                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 538                         sym_calc_value(sym);
 539                         if (!(sym->flags & SYMBOL_WRITE))
 540                                 goto next;
 541                         sym->flags &= ~SYMBOL_WRITE;
 542                         type = sym->type;
 543                         if (type == S_TRISTATE) {
 544                                 sym_calc_value(modules_sym);
 545                                 if (modules_sym->curr.tri == no)
 546                                         type = S_BOOLEAN;
 547                         }
 548                         /* Write config symbol to file */
 549                         conf_write_symbol(sym, type, out, true);
 550                 }
 551
 552 next:
 553                 if (menu->list) {
 554                         menu = menu->list;
 555                         continue;
 556                 }
 557                 if (menu->next)
 558                         menu = menu->next;
 559                 else while ((menu = menu->parent)) {
 560                         if (menu->next) {
 561                                 menu = menu->next;
 562                                 break;
 563                         }
 564                 }
 565         }
 566         fclose(out);
 567
 568         if (*tmpname) {
 569                 strcat(dirname, basename);
 570                 strcat(dirname, ".old");
 571                 rename(newname, dirname);
 572                 if (rename(tmpname, newname))
 573                         return 1;
 574         }
 575
 576         printf(_("#\n"
 577                  "# configuration written to %s\n"
 578                  "#\n"), newname);
 579
 580         sym_set_change_count(0);
 581
 582         return 0;
 583 }
 584
 585 static int conf_split_config(void)
 586 {
 587         const char *name;
 588         char path[128];
 589         char *s, *d, c;
 590         struct symbol *sym;
 591         struct stat sb;
 592         int res, i, fd;
 593
 594         name = conf_get_autoconfig_name();
 595         conf_read_simple(name, S_DEF_AUTO);
 596
 597         if (chdir("include/config"))
 598                 return 1;
 599
 600         res = 0;
 601         for_all_symbols(i, sym) {
 602                 sym_calc_value(sym);
 603                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 604                         continue;
 605                 if (sym->flags & SYMBOL_WRITE) {
 606                         if (sym->flags & SYMBOL_DEF_AUTO) {
 607                                 /*
 608                                  * symbol has old and new value,
 609                                  * so compare them...
 610                                  */
 611                                 switch (sym->type) {
 612                                 case S_BOOLEAN:
 613                                 case S_TRISTATE:
 614                                         if (sym_get_tristate_value(sym) ==
 615                                             sym->def[S_DEF_AUTO].tri)
 616                                                 continue;
 617                                         break;
 618                                 case S_STRING:
 619                                 case S_HEX:
 620                                 case S_INT:
 621                                         if (!strcmp(sym_get_string_value(sym),
 622                                                     sym->def[S_DEF_AUTO].val))
 623                                                 continue;
 624                                         break;
 625                                 default:
 626                                         break;
 627                                 }
 628                         } else {
 629                                 /*
 630                                  * If there is no old value, only 'no' (unset)
 631                                  * is allowed as new value.
 632                                  */
 633                                 switch (sym->type) {
 634                                 case S_BOOLEAN:
 635                                 case S_TRISTATE:
 636                                         if (sym_get_tristate_value(sym) == no)
 637                                                 continue;
 638                                         break;
 639                                 default:
 640                                         break;
 641                                 }
 642                         }
 643                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 644                         /* There is neither an old nor a new value. */
 645                         continue;
 646                 /* else
 647                  *      There is an old value, but no new value ('no' (unset)
 648                  *      isn't saved in auto.conf, so the old value is always
 649                  *      different from 'no').
 650                  */
 651
 652                 /* Replace all '_' and append ".h" */
 653                 s = sym->name;
 654                 d = path;
 655                 while ((c = *s++)) {
 656                         c = tolower(c);
 657                         *d++ = (c == '_') ? '/' : c;
 658                 }
 659                 strcpy(d, ".h");
 660
 661                 /* Assume directory path already exists. */
 662                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 663                 if (fd == -1) {
 664                         if (errno != ENOENT) {
 665                                 res = 1;
 666                                 break;
 667                         }
 668                         /*
 669                          * Create directory components,
 670                          * unless they exist already.
 671                          */
 672                         d = path;
 673                         while ((d = strchr(d, '/'))) {
 674                                 *d = 0;
 675                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 676                                         res = 1;
 677                                         goto out;
 678                                 }
 679                                 *d++ = '/';
 680                         }
 681                         /* Try it again. */
 682                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 683                         if (fd == -1) {
 684                                 res = 1;
 685                                 break;
 686                         }
 687                 }
 688                 close(fd);
 689         }
 690 out:
 691         if (chdir("../.."))
 692                 return 1;
 693
 694         return res;
 695 }
 696
 697 int conf_write_autoconf(void)
 698 {
 699         struct symbol *sym;
 700         const char *str;
 701         const char *name;
 702         FILE *out, *tristate, *out_h;
 703         time_t now;
 704         int i;
 705
 706         sym_clear_all_valid();
 707
 708         file_write_dep("include/config/auto.conf.cmd");
 709
 710         if (conf_split_config())
 711                 return 1;
 712
 713         out = fopen(".tmpconfig", "w");
 714         if (!out)
 715                 return 1;
 716
 717         tristate = fopen(".tmpconfig_tristate", "w");
 718         if (!tristate) {
 719                 fclose(out);
 720                 return 1;
 721         }
 722
 723         out_h = fopen(".tmpconfig.h", "w");
 724         if (!out_h) {
 725                 fclose(out);
 726                 fclose(tristate);
 727                 return 1;
 728         }
 729
 730         sym = sym_lookup("KERNELVERSION", 0);
 731         sym_calc_value(sym);
 732         time(&now);
 733         fprintf(out, "#\n"
 734                      "# Automatically generated make config: don't edit\n"
 735                      "# Linux kernel version: %s\n"
 736                      "# %s"
 737                      "#\n",
 738                      sym_get_string_value(sym), ctime(&now));
 739         fprintf(tristate, "#\n"
 740                           "# Automatically generated - do not edit\n"
 741                           "\n");
 742         fprintf(out_h, "/*\n"
 743                        " * Automatically generated C config: don't edit\n"
 744                        " * Linux kernel version: %s\n"
 745                        " * %s"
 746                        " */\n"
 747                        "#define AUTOCONF_INCLUDED\n",
 748                        sym_get_string_value(sym), ctime(&now));
 749
 750         for_all_symbols(i, sym) {
 751                 sym_calc_value(sym);
 752                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 753                         continue;
 754
 755                 /* write symbol to config file */
 756                 conf_write_symbol(sym, sym->type, out, false);
 757
 758                 /* update autoconf and tristate files */
 759                 switch (sym->type) {
 760                 case S_BOOLEAN:
 761                 case S_TRISTATE:
 762                         switch (sym_get_tristate_value(sym)) {
 763                         case no:
 764                                 break;
 765                         case mod:
 766                                 fprintf(tristate, "CONFIG_%s=M\n", sym->name);
 767                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 768                                 break;
 769                         case yes:
 770                                 if (sym->type == S_TRISTATE)
 771                                         fprintf(tristate, "CONFIG_%s=Y\n",
 772                                                         sym->name);
 773                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
 774                                 break;
 775                         }
 776                         break;
 777                 case S_STRING:
 778                         conf_write_string(true, sym->name, sym_get_string_value(sym), out_h);
 779                         break;
 780                 case S_HEX:
 781                         str = sym_get_string_value(sym);
 782                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 783                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 784                                 break;
 785                         }
 786                 case S_INT:
 787                         str = sym_get_string_value(sym);
 788                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
 789                         break;
 790                 default:
 791                         break;
 792                 }
 793         }
 794         fclose(out);
 795         fclose(tristate);
 796         fclose(out_h);
 797
 798         name = getenv("KCONFIG_AUTOHEADER");
 799         if (!name)
 800                 name = "include/generated/autoconf.h";
 801         if (rename(".tmpconfig.h", name))
 802                 return 1;
 803         name = getenv("KCONFIG_TRISTATE");
 804         if (!name)
 805                 name = "include/config/tristate.conf";
 806         if (rename(".tmpconfig_tristate", name))
 807                 return 1;
 808         name = conf_get_autoconfig_name();
 809         /*
 810          * This must be the last step, kbuild has a dependency on auto.conf
 811          * and this marks the successful completion of the previous steps.
 812          */
 813         if (rename(".tmpconfig", name))
 814                 return 1;
 815
 816         return 0;
 817 }
 818
 819 static int sym_change_count;
 820 static void (*conf_changed_callback)(void);
 821
 822 void sym_set_change_count(int count)
 823 {
 824         int _sym_change_count = sym_change_count;
 825         sym_change_count = count;
 826         if (conf_changed_callback &&
 827             (bool)_sym_change_count != (bool)count)
 828                 conf_changed_callback();
 829 }
 830
 831 void sym_add_change_count(int count)
 832 {
 833         sym_set_change_count(count + sym_change_count);
 834 }
 835
 836 bool conf_get_changed(void)
 837 {
 838         return sym_change_count;
 839 }
 840
 841 void conf_set_changed_callback(void (*fn)(void))
 842 {
 843         conf_changed_callback = fn;
 844 }
 845
 846
 847 void conf_set_all_new_symbols(enum conf_def_mode mode)
 848 {
 849         struct symbol *sym, *csym;
 850         struct property *prop;
 851         struct expr *e;
 852         int i, cnt, def;
 853
 854         for_all_symbols(i, sym) {
 855                 if (sym_has_value(sym))
 856                         continue;
 857                 switch (sym_get_type(sym)) {
 858                 case S_BOOLEAN:
 859                 case S_TRISTATE:
 860                         switch (mode) {
 861                         case def_yes:
 862                                 sym->def[S_DEF_USER].tri = yes;
 863                                 break;
 864                         case def_mod:
 865                                 sym->def[S_DEF_USER].tri = mod;
 866                                 break;
 867                         case def_no:
 868                                 sym->def[S_DEF_USER].tri = no;
 869                                 break;
 870                         case def_random:
 871                                 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
 872                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
 873                                 break;
 874                         default:
 875                                 continue;
 876                         }
 877                         if (!(sym_is_choice(sym) && mode == def_random))
 878                                 sym->flags |= SYMBOL_DEF_USER;
 879                         break;
 880                 default:
 881                         break;
 882                 }
 883
 884         }
 885
 886         sym_clear_all_valid();
 887
 888         if (mode != def_random)
 889                 return;
 890         /*
 891          * We have different type of choice blocks.
 892          * If curr.tri equal to mod then we can select several
 893          * choice symbols in one block.
 894          * In this case we do nothing.
 895          * If curr.tri equal yes then only one symbol can be
 896          * selected in a choice block and we set it to yes,
 897          * and the rest to no.
 898          */
 899         for_all_symbols(i, csym) {
 900                 if (sym_has_value(csym) || !sym_is_choice(csym))
 901                         continue;
 902
 903                 sym_calc_value(csym);
 904
 905                 if (csym->curr.tri != yes)
 906                         continue;
 907
 908                 prop = sym_get_choice_prop(csym);
 909
 910                 /* count entries in choice block */
 911                 cnt = 0;
 912                 expr_list_for_each_sym(prop->expr, e, sym)
 913                         cnt++;
 914
 915                 /*
 916                  * find a random value and set it to yes,
 917                  * set the rest to no so we have only one set
 918                  */
 919                 def = (rand() % cnt);
 920
 921                 cnt = 0;
 922                 expr_list_for_each_sym(prop->expr, e, sym) {
 923                         if (def == cnt++) {
 924                                 sym->def[S_DEF_USER].tri = yes;
 925                                 csym->def[S_DEF_USER].val = sym;
 926                         }
 927                         else {
 928                                 sym->def[S_DEF_USER].tri = no;
 929                         }
 930                 }
 931                 csym->flags |= SYMBOL_DEF_USER;
 932                 /* clear VALID to get value calculated */
 933                 csym->flags &= ~(SYMBOL_VALID);
 934         }
 935 }