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