err.no Git - linux-2.6/blob - 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_def_filename[] = ".config";
  25
  26 const char conf_defname[] = "arch/$ARCH/defconfig";
  27
  28 static void conf_warning(const char *fmt, ...)
  29 {
  30         va_list ap;
  31         va_start(ap, fmt);
  32         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  33         vfprintf(stderr, fmt, ap);
  34         fprintf(stderr, "\n");
  35         va_end(ap);
  36         conf_warnings++;
  37 }
  38
  39 static char *conf_expand_value(const char *in)
  40 {
  41         struct symbol *sym;
  42         const char *src;
  43         static char res_value[SYMBOL_MAXLENGTH];
  44         char *dst, name[SYMBOL_MAXLENGTH];
  45
  46         res_value[0] = 0;
  47         dst = name;
  48         while ((src = strchr(in, '$'))) {
  49                 strncat(res_value, in, src - in);
  50                 src++;
  51                 dst = name;
  52                 while (isalnum(*src) || *src == '_')
  53                         *dst++ = *src++;
  54                 *dst = 0;
  55                 sym = sym_lookup(name, 0);
  56                 sym_calc_value(sym);
  57                 strcat(res_value, sym_get_string_value(sym));
  58                 in = src;
  59         }
  60         strcat(res_value, in);
  61
  62         return res_value;
  63 }
  64
  65 char *conf_get_default_confname(void)
  66 {
  67         struct stat buf;
  68         static char fullname[PATH_MAX+1];
  69         char *env, *name;
  70
  71         name = conf_expand_value(conf_defname);
  72         env = getenv(SRCTREE);
  73         if (env) {
  74                 sprintf(fullname, "%s/%s", env, name);
  75                 if (!stat(fullname, &buf))
  76                         return fullname;
  77         }
  78         return name;
  79 }
  80
  81 int conf_read_simple(const char *name, int def)
  82 {
  83         FILE *in = NULL;
  84         char line[1024];
  85         char *p, *p2;
  86         struct symbol *sym;
  87         int i, def_flags;
  88
  89         if (name) {
  90                 in = zconf_fopen(name);
  91         } else {
  92                 struct property *prop;
  93
  94                 name = conf_def_filename;
  95                 in = zconf_fopen(name);
  96                 if (in)
  97                         goto load;
  98                 sym_change_count++;
  99                 if (!sym_defconfig_list)
 100                         return 1;
 101
 102                 for_all_defaults(sym_defconfig_list, prop) {
 103                         if (expr_calc_value(prop->visible.expr) == no ||
 104                             prop->expr->type != E_SYMBOL)
 105                                 continue;
 106                         name = conf_expand_value(prop->expr->left.sym->name);
 107                         in = zconf_fopen(name);
 108                         if (in) {
 109                                 printf(_("#\n"
 110                                          "# using defaults found in %s\n"
 111                                          "#\n"), name);
 112                                 goto load;
 113                         }
 114                 }
 115         }
 116         if (!in)
 117                 return 1;
 118
 119 load:
 120         conf_filename = name;
 121         conf_lineno = 0;
 122         conf_warnings = 0;
 123         conf_unsaved = 0;
 124
 125         def_flags = SYMBOL_DEF << def;
 126         for_all_symbols(i, sym) {
 127                 sym->flags |= SYMBOL_CHANGED;
 128                 sym->flags &= ~(def_flags|SYMBOL_VALID);
 129                 if (sym_is_choice(sym))
 130                         sym->flags |= def_flags;
 131                 switch (sym->type) {
 132                 case S_INT:
 133                 case S_HEX:
 134                 case S_STRING:
 135                         if (sym->def[def].val)
 136                                 free(sym->def[def].val);
 137                 default:
 138                         sym->def[def].val = NULL;
 139                         sym->def[def].tri = no;
 140                 }
 141         }
 142
 143         while (fgets(line, sizeof(line), in)) {
 144                 conf_lineno++;
 145                 sym = NULL;
 146                 switch (line[0]) {
 147                 case '#':
 148                         if (memcmp(line + 2, "CONFIG_", 7))
 149                                 continue;
 150                         p = strchr(line + 9, ' ');
 151                         if (!p)
 152                                 continue;
 153                         *p++ = 0;
 154                         if (strncmp(p, "is not set", 10))
 155                                 continue;
 156                         if (def == S_DEF_USER) {
 157                                 sym = sym_find(line + 9);
 158                                 if (!sym) {
 159                                         conf_warning("trying to assign nonexistent symbol %s", line + 9);
 160                                         break;
 161                                 }
 162                         } else {
 163                                 sym = sym_lookup(line + 9, 0);
 164                                 if (sym->type == S_UNKNOWN)
 165                                         sym->type = S_BOOLEAN;
 166                         }
 167                         if (sym->flags & def_flags) {
 168                                 conf_warning("trying to reassign symbol %s", sym->name);
 169                                 break;
 170                         }
 171                         switch (sym->type) {
 172                         case S_BOOLEAN:
 173                         case S_TRISTATE:
 174                                 sym->def[def].tri = no;
 175                                 sym->flags |= def_flags;
 176                                 break;
 177                         default:
 178                                 ;
 179                         }
 180                         break;
 181                 case 'C':
 182                         if (memcmp(line, "CONFIG_", 7)) {
 183                                 conf_warning("unexpected data");
 184                                 continue;
 185                         }
 186                         p = strchr(line + 7, '=');
 187                         if (!p)
 188                                 continue;
 189                         *p++ = 0;
 190                         p2 = strchr(p, '\n');
 191                         if (p2)
 192                                 *p2 = 0;
 193                         if (def == S_DEF_USER) {
 194                                 sym = sym_find(line + 7);
 195                                 if (!sym) {
 196                                         conf_warning("trying to assign nonexistent symbol %s", line + 7);
 197                                         break;
 198                                 }
 199                         } else {
 200                                 sym = sym_lookup(line + 7, 0);
 201                                 if (sym->type == S_UNKNOWN)
 202                                         sym->type = S_OTHER;
 203                         }
 204                         if (sym->flags & def_flags) {
 205                                 conf_warning("trying to reassign symbol %s", sym->name);
 206                                 break;
 207                         }
 208                         switch (sym->type) {
 209                         case S_TRISTATE:
 210                                 if (p[0] == 'm') {
 211                                         sym->def[def].tri = mod;
 212                                         sym->flags |= def_flags;
 213                                         break;
 214                                 }
 215                         case S_BOOLEAN:
 216                                 if (p[0] == 'y') {
 217                                         sym->def[def].tri = yes;
 218                                         sym->flags |= def_flags;
 219                                         break;
 220                                 }
 221                                 if (p[0] == 'n') {
 222                                         sym->def[def].tri = no;
 223                                         sym->flags |= def_flags;
 224                                         break;
 225                                 }
 226                                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 227                                 break;
 228                         case S_OTHER:
 229                                 if (*p != '"') {
 230                                         for (p2 = p; *p2 && !isspace(*p2); p2++)
 231                                                 ;
 232                                         sym->type = S_STRING;
 233                                         goto done;
 234                                 }
 235                         case S_STRING:
 236                                 if (*p++ != '"')
 237                                         break;
 238                                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 239                                         if (*p2 == '"') {
 240                                                 *p2 = 0;
 241                                                 break;
 242                                         }
 243                                         memmove(p2, p2 + 1, strlen(p2));
 244                                 }
 245                                 if (!p2) {
 246                                         conf_warning("invalid string found");
 247                                         continue;
 248                                 }
 249                         case S_INT:
 250                         case S_HEX:
 251                         done:
 252                                 if (sym_string_valid(sym, p)) {
 253                                         sym->def[def].val = strdup(p);
 254                                         sym->flags |= def_flags;
 255                                 } else {
 256                                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 257                                         continue;
 258                                 }
 259                                 break;
 260                         default:
 261                                 ;
 262                         }
 263                         break;
 264                 case '\n':
 265                         break;
 266                 default:
 267                         conf_warning("unexpected data");
 268                         continue;
 269                 }
 270                 if (sym && sym_is_choice_value(sym)) {
 271                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 272                         switch (sym->def[def].tri) {
 273                         case no:
 274                                 break;
 275                         case mod:
 276                                 if (cs->def[def].tri == yes) {
 277                                         conf_warning("%s creates inconsistent choice state", sym->name);
 278                                         cs->flags &= ~def_flags;
 279                                 }
 280                                 break;
 281                         case yes:
 282                                 if (cs->def[def].tri != no) {
 283                                         conf_warning("%s creates inconsistent choice state", sym->name);
 284                                         cs->flags &= ~def_flags;
 285                                 } else
 286                                         cs->def[def].val = sym;
 287                                 break;
 288                         }
 289                         cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
 290                 }
 291         }
 292         fclose(in);
 293
 294         if (modules_sym)
 295                 sym_calc_value(modules_sym);
 296         return 0;
 297 }
 298
 299 int conf_read(const char *name)
 300 {
 301         struct symbol *sym;
 302         struct property *prop;
 303         struct expr *e;
 304         int i, flags;
 305
 306         sym_change_count = 0;
 307
 308         if (conf_read_simple(name, S_DEF_USER))
 309                 return 1;
 310
 311         for_all_symbols(i, sym) {
 312                 sym_calc_value(sym);
 313                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 314                         goto sym_ok;
 315                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 316                         /* check that calculated value agrees with saved value */
 317                         switch (sym->type) {
 318                         case S_BOOLEAN:
 319                         case S_TRISTATE:
 320                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
 321                                         break;
 322                                 if (!sym_is_choice(sym))
 323                                         goto sym_ok;
 324                         default:
 325                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
 326                                         goto sym_ok;
 327                                 break;
 328                         }
 329                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 330                         /* no previous value and not saved */
 331                         goto sym_ok;
 332                 conf_unsaved++;
 333                 /* maybe print value in verbose mode... */
 334         sym_ok:
 335                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 336                         if (sym->visible == no)
 337                                 sym->flags &= ~SYMBOL_DEF_USER;
 338                         switch (sym->type) {
 339                         case S_STRING:
 340                         case S_INT:
 341                         case S_HEX:
 342                                 if (!sym_string_within_range(sym, sym->def[S_DEF_USER].val))
 343                                         sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
 344                         default:
 345                                 break;
 346                         }
 347                 }
 348                 if (!sym_is_choice(sym))
 349                         continue;
 350                 prop = sym_get_choice_prop(sym);
 351                 flags = sym->flags;
 352                 for (e = prop->expr; e; e = e->left.expr)
 353                         if (e->right.sym->visible != no)
 354                                 flags &= e->right.sym->flags;
 355                 sym->flags |= flags & SYMBOL_DEF_USER;
 356         }
 357
 358         sym_change_count += conf_warnings || conf_unsaved;
 359
 360         return 0;
 361 }
 362
 363 int conf_write(const char *name)
 364 {
 365         FILE *out;
 366         struct symbol *sym;
 367         struct menu *menu;
 368         const char *basename;
 369         char dirname[128], tmpname[128], newname[128];
 370         int type, l;
 371         const char *str;
 372         time_t now;
 373         int use_timestamp = 1;
 374         char *env;
 375
 376         dirname[0] = 0;
 377         if (name && name[0]) {
 378                 struct stat st;
 379                 char *slash;
 380
 381                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 382                         strcpy(dirname, name);
 383                         strcat(dirname, "/");
 384                         basename = conf_def_filename;
 385                 } else if ((slash = strrchr(name, '/'))) {
 386                         int size = slash - name + 1;
 387                         memcpy(dirname, name, size);
 388                         dirname[size] = 0;
 389                         if (slash[1])
 390                                 basename = slash + 1;
 391                         else
 392                                 basename = conf_def_filename;
 393                 } else
 394                         basename = name;
 395         } else
 396                 basename = conf_def_filename;
 397
 398         sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
 399         out = fopen(newname, "w");
 400         if (!out)
 401                 return 1;
 402         sym = sym_lookup("KERNELVERSION", 0);
 403         sym_calc_value(sym);
 404         time(&now);
 405         env = getenv("KCONFIG_NOTIMESTAMP");
 406         if (env && *env)
 407                 use_timestamp = 0;
 408
 409         fprintf(out, _("#\n"
 410                        "# Automatically generated make config: don't edit\n"
 411                        "# Linux kernel version: %s\n"
 412                        "%s%s"
 413                        "#\n"),
 414                      sym_get_string_value(sym),
 415                      use_timestamp ? "# " : "",
 416                      use_timestamp ? ctime(&now) : "");
 417
 418         if (!sym_change_count)
 419                 sym_clear_all_valid();
 420
 421         menu = rootmenu.list;
 422         while (menu) {
 423                 sym = menu->sym;
 424                 if (!sym) {
 425                         if (!menu_is_visible(menu))
 426                                 goto next;
 427                         str = menu_get_prompt(menu);
 428                         fprintf(out, "\n"
 429                                      "#\n"
 430                                      "# %s\n"
 431                                      "#\n", str);
 432                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 433                         sym_calc_value(sym);
 434                         if (!(sym->flags & SYMBOL_WRITE))
 435                                 goto next;
 436                         sym->flags &= ~SYMBOL_WRITE;
 437                         type = sym->type;
 438                         if (type == S_TRISTATE) {
 439                                 sym_calc_value(modules_sym);
 440                                 if (modules_sym->curr.tri == no)
 441                                         type = S_BOOLEAN;
 442                         }
 443                         switch (type) {
 444                         case S_BOOLEAN:
 445                         case S_TRISTATE:
 446                                 switch (sym_get_tristate_value(sym)) {
 447                                 case no:
 448                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 449                                         break;
 450                                 case mod:
 451                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
 452                                         break;
 453                                 case yes:
 454                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
 455                                         break;
 456                                 }
 457                                 break;
 458                         case S_STRING:
 459                                 str = sym_get_string_value(sym);
 460                                 fprintf(out, "CONFIG_%s=\"", sym->name);
 461                                 while (1) {
 462                                         l = strcspn(str, "\"\\");
 463                                         if (l) {
 464                                                 fwrite(str, l, 1, out);
 465                                                 str += l;
 466                                         }
 467                                         if (!*str)
 468                                                 break;
 469                                         fprintf(out, "\\%c", *str++);
 470                                 }
 471                                 fputs("\"\n", out);
 472                                 break;
 473                         case S_HEX:
 474                                 str = sym_get_string_value(sym);
 475                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 476                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 477                                         break;
 478                                 }
 479                         case S_INT:
 480                                 str = sym_get_string_value(sym);
 481                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 482                                 break;
 483                         }
 484                 }
 485
 486         next:
 487                 if (menu->list) {
 488                         menu = menu->list;
 489                         continue;
 490                 }
 491                 if (menu->next)
 492                         menu = menu->next;
 493                 else while ((menu = menu->parent)) {
 494                         if (menu->next) {
 495                                 menu = menu->next;
 496                                 break;
 497                         }
 498                 }
 499         }
 500         fclose(out);
 501         if (!name || basename != conf_def_filename) {
 502                 if (!name)
 503                         name = conf_def_filename;
 504                 sprintf(tmpname, "%s.old", name);
 505                 rename(name, tmpname);
 506         }
 507         sprintf(tmpname, "%s%s", dirname, basename);
 508         if (rename(newname, tmpname))
 509                 return 1;
 510
 511         printf(_("#\n"
 512                  "# configuration written to %s\n"
 513                  "#\n"), tmpname);
 514
 515         sym_change_count = 0;
 516
 517         return 0;
 518 }
 519
 520 int conf_split_config(void)
 521 {
 522         char *name, path[128];
 523         char *s, *d, c;
 524         struct symbol *sym;
 525         struct stat sb;
 526         int res, i, fd;
 527
 528         name = getenv("KCONFIG_AUTOCONFIG");
 529         if (!name)
 530                 name = "include/config/auto.conf";
 531         conf_read_simple(name, S_DEF_AUTO);
 532
 533         if (chdir("include/config"))
 534                 return 1;
 535
 536         res = 0;
 537         for_all_symbols(i, sym) {
 538                 sym_calc_value(sym);
 539                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 540                         continue;
 541                 if (sym->flags & SYMBOL_WRITE) {
 542                         if (sym->flags & SYMBOL_DEF_AUTO) {
 543                                 /*
 544                                  * symbol has old and new value,
 545                                  * so compare them...
 546                                  */
 547                                 switch (sym->type) {
 548                                 case S_BOOLEAN:
 549                                 case S_TRISTATE:
 550                                         if (sym_get_tristate_value(sym) ==
 551                                             sym->def[S_DEF_AUTO].tri)
 552                                                 continue;
 553                                         break;
 554                                 case S_STRING:
 555                                 case S_HEX:
 556                                 case S_INT:
 557                                         if (!strcmp(sym_get_string_value(sym),
 558                                                     sym->def[S_DEF_AUTO].val))
 559                                                 continue;
 560                                         break;
 561                                 default:
 562                                         break;
 563                                 }
 564                         } else {
 565                                 /*
 566                                  * If there is no old value, only 'no' (unset)
 567                                  * is allowed as new value.
 568                                  */
 569                                 switch (sym->type) {
 570                                 case S_BOOLEAN:
 571                                 case S_TRISTATE:
 572                                         if (sym_get_tristate_value(sym) == no)
 573                                                 continue;
 574                                         break;
 575                                 default:
 576                                         break;
 577                                 }
 578                         }
 579                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 580                         /* There is neither an old nor a new value. */
 581                         continue;
 582                 /* else
 583                  *      There is an old value, but no new value ('no' (unset)
 584                  *      isn't saved in auto.conf, so the old value is always
 585                  *      different from 'no').
 586                  */
 587
 588                 /* Replace all '_' and append ".h" */
 589                 s = sym->name;
 590                 d = path;
 591                 while ((c = *s++)) {
 592                         c = tolower(c);
 593                         *d++ = (c == '_') ? '/' : c;
 594                 }
 595                 strcpy(d, ".h");
 596
 597                 /* Assume directory path already exists. */
 598                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 599                 if (fd == -1) {
 600                         if (errno != ENOENT) {
 601                                 res = 1;
 602                                 break;
 603                         }
 604                         /*
 605                          * Create directory components,
 606                          * unless they exist already.
 607                          */
 608                         d = path;
 609                         while ((d = strchr(d, '/'))) {
 610                                 *d = 0;
 611                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 612                                         res = 1;
 613                                         goto out;
 614                                 }
 615                                 *d++ = '/';
 616                         }
 617                         /* Try it again. */
 618                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 619                         if (fd == -1) {
 620                                 res = 1;
 621                                 break;
 622                         }
 623                 }
 624                 close(fd);
 625         }
 626 out:
 627         if (chdir("../.."))
 628                 return 1;
 629
 630         return res;
 631 }
 632
 633 int conf_write_autoconf(void)
 634 {
 635         struct symbol *sym;
 636         const char *str;
 637         char *name;
 638         FILE *out, *out_h;
 639         time_t now;
 640         int i, l;
 641
 642         sym_clear_all_valid();
 643
 644         file_write_dep("include/config/auto.conf.cmd");
 645
 646         if (conf_split_config())
 647                 return 1;
 648
 649         out = fopen(".tmpconfig", "w");
 650         if (!out)
 651                 return 1;
 652
 653         out_h = fopen(".tmpconfig.h", "w");
 654         if (!out_h) {
 655                 fclose(out);
 656                 return 1;
 657         }
 658
 659         sym = sym_lookup("KERNELVERSION", 0);
 660         sym_calc_value(sym);
 661         time(&now);
 662         fprintf(out, "#\n"
 663                      "# Automatically generated make config: don't edit\n"
 664                      "# Linux kernel version: %s\n"
 665                      "# %s"
 666                      "#\n",
 667                      sym_get_string_value(sym), ctime(&now));
 668         fprintf(out_h, "/*\n"
 669                        " * Automatically generated C config: don't edit\n"
 670                        " * Linux kernel version: %s\n"
 671                        " * %s"
 672                        " */\n"
 673                        "#define AUTOCONF_INCLUDED\n",
 674                        sym_get_string_value(sym), ctime(&now));
 675
 676         for_all_symbols(i, sym) {
 677                 sym_calc_value(sym);
 678                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 679                         continue;
 680                 switch (sym->type) {
 681                 case S_BOOLEAN:
 682                 case S_TRISTATE:
 683                         switch (sym_get_tristate_value(sym)) {
 684                         case no:
 685                                 break;
 686                         case mod:
 687                                 fprintf(out, "CONFIG_%s=m\n", sym->name);
 688                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 689                                 break;
 690                         case yes:
 691                                 fprintf(out, "CONFIG_%s=y\n", sym->name);
 692                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
 693                                 break;
 694                         }
 695                         break;
 696                 case S_STRING:
 697                         str = sym_get_string_value(sym);
 698                         fprintf(out, "CONFIG_%s=\"", sym->name);
 699                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
 700                         while (1) {
 701                                 l = strcspn(str, "\"\\");
 702                                 if (l) {
 703                                         fwrite(str, l, 1, out);
 704                                         fwrite(str, l, 1, out_h);
 705                                         str += l;
 706                                 }
 707                                 if (!*str)
 708                                         break;
 709                                 fprintf(out, "\\%c", *str);
 710                                 fprintf(out_h, "\\%c", *str);
 711                                 str++;
 712                         }
 713                         fputs("\"\n", out);
 714                         fputs("\"\n", out_h);
 715                         break;
 716                 case S_HEX:
 717                         str = sym_get_string_value(sym);
 718                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 719                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 720                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 721                                 break;
 722                         }
 723                 case S_INT:
 724                         str = sym_get_string_value(sym);
 725                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 726                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
 727                         break;
 728                 default:
 729                         break;
 730                 }
 731         }
 732         fclose(out);
 733         fclose(out_h);
 734
 735         name = getenv("KCONFIG_AUTOHEADER");
 736         if (!name)
 737                 name = "include/linux/autoconf.h";
 738         if (rename(".tmpconfig.h", name))
 739                 return 1;
 740         name = getenv("KCONFIG_AUTOCONFIG");
 741         if (!name)
 742                 name = "include/config/auto.conf";
 743         /*
 744          * This must be the last step, kbuild has a dependency on auto.conf
 745          * and this marks the successful completion of the previous steps.
 746          */
 747         if (rename(".tmpconfig", name))
 748                 return 1;
 749
 750         return 0;
 751 }