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