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/$ARCH/defconfig";
  25
  26 static void conf_warning(const char *fmt, ...)
  27 {
  28         va_list ap;
  29         va_start(ap, fmt);
  30         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  31         vfprintf(stderr, fmt, ap);
  32         fprintf(stderr, "\n");
  33         va_end(ap);
  34         conf_warnings++;
  35 }
  36
  37 const char *conf_get_configname(void)
  38 {
  39         char *name = getenv("KCONFIG_CONFIG");
  40
  41         return name ? name : ".config";
  42 }
  43
  44 const char *conf_get_autoconfig_name(void)
  45 {
  46         char *name = getenv("KCONFIG_AUTOCONFIG");
  47
  48         return name ? name : "include/config/auto.conf";
  49 }
  50
  51 static char *conf_expand_value(const char *in)
  52 {
  53         struct symbol *sym;
  54         const char *src;
  55         static char res_value[SYMBOL_MAXLENGTH];
  56         char *dst, name[SYMBOL_MAXLENGTH];
  57
  58         res_value[0] = 0;
  59         dst = name;
  60         while ((src = strchr(in, '$'))) {
  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                         if (memcmp(line + 2, "CONFIG_", 7))
 223                                 continue;
 224                         p = strchr(line + 9, ' ');
 225                         if (!p)
 226                                 continue;
 227                         *p++ = 0;
 228                         if (strncmp(p, "is not set", 10))
 229                                 continue;
 230                         if (def == S_DEF_USER) {
 231                                 sym = sym_find(line + 9);
 232                                 if (!sym) {
 233                                         sym_add_change_count(1);
 234                                         break;
 235                                 }
 236                         } else {
 237                                 sym = sym_lookup(line + 9, 0);
 238                                 if (sym->type == S_UNKNOWN)
 239                                         sym->type = S_BOOLEAN;
 240                         }
 241                         if (sym->flags & def_flags) {
 242                                 conf_warning("override: reassigning to symbol %s", sym->name);
 243                         }
 244                         switch (sym->type) {
 245                         case S_BOOLEAN:
 246                         case S_TRISTATE:
 247                                 sym->def[def].tri = no;
 248                                 sym->flags |= def_flags;
 249                                 break;
 250                         default:
 251                                 ;
 252                         }
 253                         break;
 254                 case 'C':
 255                         if (memcmp(line, "CONFIG_", 7)) {
 256                                 conf_warning("unexpected data");
 257                                 continue;
 258                         }
 259                         p = strchr(line + 7, '=');
 260                         if (!p)
 261                                 continue;
 262                         *p++ = 0;
 263                         p2 = strchr(p, '\n');
 264                         if (p2) {
 265                                 *p2-- = 0;
 266                                 if (*p2 == '\r')
 267                                         *p2 = 0;
 268                         }
 269                         if (def == S_DEF_USER) {
 270                                 sym = sym_find(line + 7);
 271                                 if (!sym) {
 272                                         sym_add_change_count(1);
 273                                         break;
 274                                 }
 275                         } else {
 276                                 sym = sym_lookup(line + 7, 0);
 277                                 if (sym->type == S_UNKNOWN)
 278                                         sym->type = S_OTHER;
 279                         }
 280                         if (sym->flags & def_flags) {
 281                                 conf_warning("override: reassigning to symbol %s", sym->name);
 282                         }
 283                         if (conf_set_sym_val(sym, def, def_flags, p))
 284                                 continue;
 285                         break;
 286                 case '\r':
 287                 case '\n':
 288                         break;
 289                 default:
 290                         conf_warning("unexpected data");
 291                         continue;
 292                 }
 293                 if (sym && sym_is_choice_value(sym)) {
 294                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 295                         switch (sym->def[def].tri) {
 296                         case no:
 297                                 break;
 298                         case mod:
 299                                 if (cs->def[def].tri == yes) {
 300                                         conf_warning("%s creates inconsistent choice state", sym->name);
 301                                         cs->flags &= ~def_flags;
 302                                 }
 303                                 break;
 304                         case yes:
 305                                 if (cs->def[def].tri != no)
 306                                         conf_warning("override: %s changes choice state", sym->name);
 307                                 cs->def[def].val = sym;
 308                                 break;
 309                         }
 310                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
 311                 }
 312         }
 313         fclose(in);
 314
 315         if (modules_sym)
 316                 sym_calc_value(modules_sym);
 317         return 0;
 318 }
 319
 320 int conf_read(const char *name)
 321 {
 322         struct symbol *sym, *choice_sym;
 323         struct property *prop;
 324         struct expr *e;
 325         int i, flags;
 326
 327         sym_set_change_count(0);
 328
 329         if (conf_read_simple(name, S_DEF_USER))
 330                 return 1;
 331
 332         for_all_symbols(i, sym) {
 333                 sym_calc_value(sym);
 334                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 335                         goto sym_ok;
 336                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 337                         /* check that calculated value agrees with saved value */
 338                         switch (sym->type) {
 339                         case S_BOOLEAN:
 340                         case S_TRISTATE:
 341                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
 342                                         break;
 343                                 if (!sym_is_choice(sym))
 344                                         goto sym_ok;
 345                         default:
 346                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
 347                                         goto sym_ok;
 348                                 break;
 349                         }
 350                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 351                         /* no previous value and not saved */
 352                         goto sym_ok;
 353                 conf_unsaved++;
 354                 /* maybe print value in verbose mode... */
 355         sym_ok:
 356                 if (!sym_is_choice(sym))
 357                         continue;
 358                 /* The choice symbol only has a set value (and thus is not new)
 359                  * if all its visible childs have values.
 360                  */
 361                 prop = sym_get_choice_prop(sym);
 362                 flags = sym->flags;
 363                 expr_list_for_each_sym(prop->expr, e, choice_sym)
 364                         if (choice_sym->visible != no)
 365                                 flags &= choice_sym->flags;
 366                 sym->flags &= flags | ~SYMBOL_DEF_USER;
 367         }
 368
 369         for_all_symbols(i, sym) {
 370                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 371                         /* Reset values of generates values, so they'll appear
 372                          * as new, if they should become visible, but that
 373                          * doesn't quite work if the Kconfig and the saved
 374                          * configuration disagree.
 375                          */
 376                         if (sym->visible == no && !conf_unsaved)
 377                                 sym->flags &= ~SYMBOL_DEF_USER;
 378                         switch (sym->type) {
 379                         case S_STRING:
 380                         case S_INT:
 381                         case S_HEX:
 382                                 /* Reset a string value if it's out of range */
 383                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
 384                                         break;
 385                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
 386                                 conf_unsaved++;
 387                                 break;
 388                         default:
 389                                 break;
 390                         }
 391                 }
 392         }
 393
 394         sym_add_change_count(conf_warnings || conf_unsaved);
 395
 396         return 0;
 397 }
 398
 399 int conf_write(const char *name)
 400 {
 401         FILE *out;
 402         struct symbol *sym;
 403         struct menu *menu;
 404         const char *basename;
 405         char dirname[128], tmpname[128], newname[128];
 406         int type, l;
 407         const char *str;
 408         time_t now;
 409         int use_timestamp = 1;
 410         char *env;
 411
 412         dirname[0] = 0;
 413         if (name && name[0]) {
 414                 struct stat st;
 415                 char *slash;
 416
 417                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 418                         strcpy(dirname, name);
 419                         strcat(dirname, "/");
 420                         basename = conf_get_configname();
 421                 } else if ((slash = strrchr(name, '/'))) {
 422                         int size = slash - name + 1;
 423                         memcpy(dirname, name, size);
 424                         dirname[size] = 0;
 425                         if (slash[1])
 426                                 basename = slash + 1;
 427                         else
 428                                 basename = conf_get_configname();
 429                 } else
 430                         basename = name;
 431         } else
 432                 basename = conf_get_configname();
 433
 434         sprintf(newname, "%s%s", dirname, basename);
 435         env = getenv("KCONFIG_OVERWRITECONFIG");
 436         if (!env || !*env) {
 437                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
 438                 out = fopen(tmpname, "w");
 439         } else {
 440                 *tmpname = 0;
 441                 out = fopen(newname, "w");
 442         }
 443         if (!out)
 444                 return 1;
 445
 446         sym = sym_lookup("KERNELVERSION", 0);
 447         sym_calc_value(sym);
 448         time(&now);
 449         env = getenv("KCONFIG_NOTIMESTAMP");
 450         if (env && *env)
 451                 use_timestamp = 0;
 452
 453         fprintf(out, _("#\n"
 454                        "# Automatically generated make config: don't edit\n"
 455                        "# Linux kernel version: %s\n"
 456                        "%s%s"
 457                        "#\n"),
 458                      sym_get_string_value(sym),
 459                      use_timestamp ? "# " : "",
 460                      use_timestamp ? ctime(&now) : "");
 461
 462         if (!conf_get_changed())
 463                 sym_clear_all_valid();
 464
 465         menu = rootmenu.list;
 466         while (menu) {
 467                 sym = menu->sym;
 468                 if (!sym) {
 469                         if (!menu_is_visible(menu))
 470                                 goto next;
 471                         str = menu_get_prompt(menu);
 472                         fprintf(out, "\n"
 473                                      "#\n"
 474                                      "# %s\n"
 475                                      "#\n", str);
 476                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 477                         sym_calc_value(sym);
 478                         if (!(sym->flags & SYMBOL_WRITE))
 479                                 goto next;
 480                         sym->flags &= ~SYMBOL_WRITE;
 481                         type = sym->type;
 482                         if (type == S_TRISTATE) {
 483                                 sym_calc_value(modules_sym);
 484                                 if (modules_sym->curr.tri == no)
 485                                         type = S_BOOLEAN;
 486                         }
 487                         switch (type) {
 488                         case S_BOOLEAN:
 489                         case S_TRISTATE:
 490                                 switch (sym_get_tristate_value(sym)) {
 491                                 case no:
 492                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 493                                         break;
 494                                 case mod:
 495                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
 496                                         break;
 497                                 case yes:
 498                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
 499                                         break;
 500                                 }
 501                                 break;
 502                         case S_STRING:
 503                                 str = sym_get_string_value(sym);
 504                                 fprintf(out, "CONFIG_%s=\"", sym->name);
 505                                 while (1) {
 506                                         l = strcspn(str, "\"\\");
 507                                         if (l) {
 508                                                 fwrite(str, l, 1, out);
 509                                                 str += l;
 510                                         }
 511                                         if (!*str)
 512                                                 break;
 513                                         fprintf(out, "\\%c", *str++);
 514                                 }
 515                                 fputs("\"\n", out);
 516                                 break;
 517                         case S_HEX:
 518                                 str = sym_get_string_value(sym);
 519                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 520                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 521                                         break;
 522                                 }
 523                         case S_INT:
 524                                 str = sym_get_string_value(sym);
 525                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 526                                 break;
 527                         }
 528                 }
 529
 530         next:
 531                 if (menu->list) {
 532                         menu = menu->list;
 533                         continue;
 534                 }
 535                 if (menu->next)
 536                         menu = menu->next;
 537                 else while ((menu = menu->parent)) {
 538                         if (menu->next) {
 539                                 menu = menu->next;
 540                                 break;
 541                         }
 542                 }
 543         }
 544         fclose(out);
 545
 546         if (*tmpname) {
 547                 strcat(dirname, basename);
 548                 strcat(dirname, ".old");
 549                 rename(newname, dirname);
 550                 if (rename(tmpname, newname))
 551                         return 1;
 552         }
 553
 554         printf(_("#\n"
 555                  "# configuration written to %s\n"
 556                  "#\n"), newname);
 557
 558         sym_set_change_count(0);
 559
 560         return 0;
 561 }
 562
 563 static int conf_split_config(void)
 564 {
 565         const char *name;
 566         char path[128];
 567         char *s, *d, c;
 568         struct symbol *sym;
 569         struct stat sb;
 570         int res, i, fd;
 571
 572         name = conf_get_autoconfig_name();
 573         conf_read_simple(name, S_DEF_AUTO);
 574
 575         if (chdir("include/config"))
 576                 return 1;
 577
 578         res = 0;
 579         for_all_symbols(i, sym) {
 580                 sym_calc_value(sym);
 581                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 582                         continue;
 583                 if (sym->flags & SYMBOL_WRITE) {
 584                         if (sym->flags & SYMBOL_DEF_AUTO) {
 585                                 /*
 586                                  * symbol has old and new value,
 587                                  * so compare them...
 588                                  */
 589                                 switch (sym->type) {
 590                                 case S_BOOLEAN:
 591                                 case S_TRISTATE:
 592                                         if (sym_get_tristate_value(sym) ==
 593                                             sym->def[S_DEF_AUTO].tri)
 594                                                 continue;
 595                                         break;
 596                                 case S_STRING:
 597                                 case S_HEX:
 598                                 case S_INT:
 599                                         if (!strcmp(sym_get_string_value(sym),
 600                                                     sym->def[S_DEF_AUTO].val))
 601                                                 continue;
 602                                         break;
 603                                 default:
 604                                         break;
 605                                 }
 606                         } else {
 607                                 /*
 608                                  * If there is no old value, only 'no' (unset)
 609                                  * is allowed as new value.
 610                                  */
 611                                 switch (sym->type) {
 612                                 case S_BOOLEAN:
 613                                 case S_TRISTATE:
 614                                         if (sym_get_tristate_value(sym) == no)
 615                                                 continue;
 616                                         break;
 617                                 default:
 618                                         break;
 619                                 }
 620                         }
 621                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 622                         /* There is neither an old nor a new value. */
 623                         continue;
 624                 /* else
 625                  *      There is an old value, but no new value ('no' (unset)
 626                  *      isn't saved in auto.conf, so the old value is always
 627                  *      different from 'no').
 628                  */
 629
 630                 /* Replace all '_' and append ".h" */
 631                 s = sym->name;
 632                 d = path;
 633                 while ((c = *s++)) {
 634                         c = tolower(c);
 635                         *d++ = (c == '_') ? '/' : c;
 636                 }
 637                 strcpy(d, ".h");
 638
 639                 /* Assume directory path already exists. */
 640                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 641                 if (fd == -1) {
 642                         if (errno != ENOENT) {
 643                                 res = 1;
 644                                 break;
 645                         }
 646                         /*
 647                          * Create directory components,
 648                          * unless they exist already.
 649                          */
 650                         d = path;
 651                         while ((d = strchr(d, '/'))) {
 652                                 *d = 0;
 653                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 654                                         res = 1;
 655                                         goto out;
 656                                 }
 657                                 *d++ = '/';
 658                         }
 659                         /* Try it again. */
 660                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 661                         if (fd == -1) {
 662                                 res = 1;
 663                                 break;
 664                         }
 665                 }
 666                 close(fd);
 667         }
 668 out:
 669         if (chdir("../.."))
 670                 return 1;
 671
 672         return res;
 673 }
 674
 675 int conf_write_autoconf(void)
 676 {
 677         struct symbol *sym;
 678         const char *str;
 679         const char *name;
 680         FILE *out, *tristate, *out_h;
 681         time_t now;
 682         int i, l;
 683
 684         sym_clear_all_valid();
 685
 686         file_write_dep("include/config/auto.conf.cmd");
 687
 688         if (conf_split_config())
 689                 return 1;
 690
 691         out = fopen(".tmpconfig", "w");
 692         if (!out)
 693                 return 1;
 694
 695         tristate = fopen(".tmpconfig_tristate", "w");
 696         if (!tristate) {
 697                 fclose(out);
 698                 return 1;
 699         }
 700
 701         out_h = fopen(".tmpconfig.h", "w");
 702         if (!out_h) {
 703                 fclose(out);
 704                 fclose(tristate);
 705                 return 1;
 706         }
 707
 708         sym = sym_lookup("KERNELVERSION", 0);
 709         sym_calc_value(sym);
 710         time(&now);
 711         fprintf(out, "#\n"
 712                      "# Automatically generated make config: don't edit\n"
 713                      "# Linux kernel version: %s\n"
 714                      "# %s"
 715                      "#\n",
 716                      sym_get_string_value(sym), ctime(&now));
 717         fprintf(tristate, "#\n"
 718                           "# Automatically generated - do not edit\n"
 719                           "\n");
 720         fprintf(out_h, "/*\n"
 721                        " * Automatically generated C config: don't edit\n"
 722                        " * Linux kernel version: %s\n"
 723                        " * %s"
 724                        " */\n"
 725                        "#define AUTOCONF_INCLUDED\n",
 726                        sym_get_string_value(sym), ctime(&now));
 727
 728         for_all_symbols(i, sym) {
 729                 sym_calc_value(sym);
 730                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 731                         continue;
 732                 switch (sym->type) {
 733                 case S_BOOLEAN:
 734                 case S_TRISTATE:
 735                         switch (sym_get_tristate_value(sym)) {
 736                         case no:
 737                                 break;
 738                         case mod:
 739                                 fprintf(out, "CONFIG_%s=m\n", sym->name);
 740                                 fprintf(tristate, "CONFIG_%s=M\n", sym->name);
 741                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 742                                 break;
 743                         case yes:
 744                                 fprintf(out, "CONFIG_%s=y\n", sym->name);
 745                                 if (sym->type == S_TRISTATE)
 746                                         fprintf(tristate, "CONFIG_%s=Y\n",
 747                                                         sym->name);
 748                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
 749                                 break;
 750                         }
 751                         break;
 752                 case S_STRING:
 753                         str = sym_get_string_value(sym);
 754                         fprintf(out, "CONFIG_%s=\"", sym->name);
 755                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
 756                         while (1) {
 757                                 l = strcspn(str, "\"\\");
 758                                 if (l) {
 759                                         fwrite(str, l, 1, out);
 760                                         fwrite(str, l, 1, out_h);
 761                                         str += l;
 762                                 }
 763                                 if (!*str)
 764                                         break;
 765                                 fprintf(out, "\\%c", *str);
 766                                 fprintf(out_h, "\\%c", *str);
 767                                 str++;
 768                         }
 769                         fputs("\"\n", out);
 770                         fputs("\"\n", out_h);
 771                         break;
 772                 case S_HEX:
 773                         str = sym_get_string_value(sym);
 774                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 775                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 776                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 777                                 break;
 778                         }
 779                 case S_INT:
 780                         str = sym_get_string_value(sym);
 781                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 782                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
 783                         break;
 784                 default:
 785                         break;
 786                 }
 787         }
 788         fclose(out);
 789         fclose(tristate);
 790         fclose(out_h);
 791
 792         name = getenv("KCONFIG_AUTOHEADER");
 793         if (!name)
 794                 name = "include/generated/autoconf.h";
 795         if (rename(".tmpconfig.h", name))
 796                 return 1;
 797         name = getenv("KCONFIG_TRISTATE");
 798         if (!name)
 799                 name = "include/config/tristate.conf";
 800         if (rename(".tmpconfig_tristate", name))
 801                 return 1;
 802         name = conf_get_autoconfig_name();
 803         /*
 804          * This must be the last step, kbuild has a dependency on auto.conf
 805          * and this marks the successful completion of the previous steps.
 806          */
 807         if (rename(".tmpconfig", name))
 808                 return 1;
 809
 810         return 0;
 811 }
 812
 813 static int sym_change_count;
 814 static void (*conf_changed_callback)(void);
 815
 816 void sym_set_change_count(int count)
 817 {
 818         int _sym_change_count = sym_change_count;
 819         sym_change_count = count;
 820         if (conf_changed_callback &&
 821             (bool)_sym_change_count != (bool)count)
 822                 conf_changed_callback();
 823 }
 824
 825 void sym_add_change_count(int count)
 826 {
 827         sym_set_change_count(count + sym_change_count);
 828 }
 829
 830 bool conf_get_changed(void)
 831 {
 832         return sym_change_count;
 833 }
 834
 835 void conf_set_changed_callback(void (*fn)(void))
 836 {
 837         conf_changed_callback = fn;
 838 }
 839
 840
 841 void conf_set_all_new_symbols(enum conf_def_mode mode)
 842 {
 843         struct symbol *sym, *csym;
 844         struct property *prop;
 845         struct expr *e;
 846         int i, cnt, def;
 847
 848         for_all_symbols(i, sym) {
 849                 if (sym_has_value(sym))
 850                         continue;
 851                 switch (sym_get_type(sym)) {
 852                 case S_BOOLEAN:
 853                 case S_TRISTATE:
 854                         switch (mode) {
 855                         case def_yes:
 856                                 sym->def[S_DEF_USER].tri = yes;
 857                                 break;
 858                         case def_mod:
 859                                 sym->def[S_DEF_USER].tri = mod;
 860                                 break;
 861                         case def_no:
 862                                 sym->def[S_DEF_USER].tri = no;
 863                                 break;
 864                         case def_random:
 865                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % 3);
 866                                 break;
 867                         default:
 868                                 continue;
 869                         }
 870                         if (!(sym_is_choice(sym) && mode == def_random))
 871                                 sym->flags |= SYMBOL_DEF_USER;
 872                         break;
 873                 default:
 874                         break;
 875                 }
 876
 877         }
 878
 879         sym_clear_all_valid();
 880
 881         if (mode != def_random)
 882                 return;
 883         /*
 884          * We have different type of choice blocks.
 885          * If curr.tri equal to mod then we can select several
 886          * choice symbols in one block.
 887          * In this case we do nothing.
 888          * If curr.tri equal yes then only one symbol can be
 889          * selected in a choice block and we set it to yes,
 890          * and the rest to no.
 891          */
 892         for_all_symbols(i, csym) {
 893                 if (sym_has_value(csym) || !sym_is_choice(csym))
 894                         continue;
 895
 896                 sym_calc_value(csym);
 897
 898                 if (csym->curr.tri != yes)
 899                         continue;
 900
 901                 prop = sym_get_choice_prop(csym);
 902
 903                 /* count entries in choice block */
 904                 cnt = 0;
 905                 expr_list_for_each_sym(prop->expr, e, sym)
 906                         cnt++;
 907
 908                 /*
 909                  * find a random value and set it to yes,
 910                  * set the rest to no so we have only one set
 911                  */
 912                 def = (rand() % cnt);
 913
 914                 cnt = 0;
 915                 expr_list_for_each_sym(prop->expr, e, sym) {
 916                         if (def == cnt++) {
 917                                 sym->def[S_DEF_USER].tri = yes;
 918                                 csym->def[S_DEF_USER].val = sym;
 919                         }
 920                         else {
 921                                 sym->def[S_DEF_USER].tri = no;
 922                         }
 923                 }
 924                 csym->flags |= SYMBOL_DEF_USER;
 925                 /* clear VALID to get value calculated */
 926                 csym->flags &= ~(SYMBOL_VALID);
 927         }
 928 }