config/confdata.c

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