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