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                         if (modules_sym)
 175                                 sym_calc_value(modules_sym);
 176                         return 1;
 177                 }
 178
 179                 for_all_defaults(sym_defconfig_list, prop) {
 180                         if (expr_calc_value(prop->visible.expr) == no ||
 181                             prop->expr->type != E_SYMBOL)
 182                                 continue;
 183                         name = conf_expand_value(prop->expr->left.sym->name);
 184                         in = zconf_fopen(name);
 185                         if (in) {
 186                                 printf(_("#\n"
 187                                          "# using defaults found in %s\n"
 188                                          "#\n"), name);
 189                                 goto load;
 190                         }
 191                 }
 192         }
 193         if (!in)
 194                 return 1;
 195
 196 load:
 197         conf_filename = name;
 198         conf_lineno = 0;
 199         conf_warnings = 0;
 200         conf_unsaved = 0;
 201
 202         def_flags = SYMBOL_DEF << def;
 203         for_all_symbols(i, sym) {
 204                 sym->flags |= SYMBOL_CHANGED;
 205                 sym->flags &= ~(def_flags|SYMBOL_VALID);
 206                 if (sym_is_choice(sym))
 207                         sym->flags |= def_flags;
 208                 switch (sym->type) {
 209                 case S_INT:
 210                 case S_HEX:
 211                 case S_STRING:
 212                         if (sym->def[def].val)
 213                                 free(sym->def[def].val);
 214                 default:
 215                         sym->def[def].val = NULL;
 216                         sym->def[def].tri = no;
 217                 }
 218         }
 219
 220         while (fgets(line, sizeof(line), in)) {
 221                 conf_lineno++;
 222                 sym = NULL;
 223                 switch (line[0]) {
 224                 case '#':
 225                         if (memcmp(line + 2, "CONFIG_", 7))
 226                                 continue;
 227                         p = strchr(line + 9, ' ');
 228                         if (!p)
 229                                 continue;
 230                         *p++ = 0;
 231                         if (strncmp(p, "is not set", 10))
 232                                 continue;
 233                         if (def == S_DEF_USER) {
 234                                 sym = sym_find(line + 9);
 235                                 if (!sym) {
 236                                         sym_add_change_count(1);
 237                                         break;
 238                                 }
 239                         } else {
 240                                 sym = sym_lookup(line + 9, 0);
 241                                 if (sym->type == S_UNKNOWN)
 242                                         sym->type = S_BOOLEAN;
 243                         }
 244                         if (sym->flags & def_flags) {
 245                                 conf_warning("override: reassigning to symbol %s", sym->name);
 246                         }
 247                         switch (sym->type) {
 248                         case S_BOOLEAN:
 249                         case S_TRISTATE:
 250                                 sym->def[def].tri = no;
 251                                 sym->flags |= def_flags;
 252                                 break;
 253                         default:
 254                                 ;
 255                         }
 256                         break;
 257                 case 'C':
 258                         if (memcmp(line, "CONFIG_", 7)) {
 259                                 conf_warning("unexpected data");
 260                                 continue;
 261                         }
 262                         p = strchr(line + 7, '=');
 263                         if (!p)
 264                                 continue;
 265                         *p++ = 0;
 266                         p2 = strchr(p, '\n');
 267                         if (p2) {
 268                                 *p2-- = 0;
 269                                 if (*p2 == '\r')
 270                                         *p2 = 0;
 271                         }
 272                         if (def == S_DEF_USER) {
 273                                 sym = sym_find(line + 7);
 274                                 if (!sym) {
 275                                         sym_add_change_count(1);
 276                                         break;
 277                                 }
 278                         } else {
 279                                 sym = sym_lookup(line + 7, 0);
 280                                 if (sym->type == S_UNKNOWN)
 281                                         sym->type = S_OTHER;
 282                         }
 283                         if (sym->flags & def_flags) {
 284                                 conf_warning("override: reassigning to symbol %s", sym->name);
 285                         }
 286                         if (conf_set_sym_val(sym, def, def_flags, p))
 287                                 continue;
 288                         break;
 289                 case '\r':
 290                 case '\n':
 291                         break;
 292                 default:
 293                         conf_warning("unexpected data");
 294                         continue;
 295                 }
 296                 if (sym && sym_is_choice_value(sym)) {
 297                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 298                         switch (sym->def[def].tri) {
 299                         case no:
 300                                 break;
 301                         case mod:
 302                                 if (cs->def[def].tri == yes) {
 303                                         conf_warning("%s creates inconsistent choice state", sym->name);
 304                                         cs->flags &= ~def_flags;
 305                                 }
 306                                 break;
 307                         case yes:
 308                                 if (cs->def[def].tri != no)
 309                                         conf_warning("override: %s changes choice state", sym->name);
 310                                 cs->def[def].val = sym;
 311                                 break;
 312                         }
 313                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
 314                 }
 315         }
 316         fclose(in);
 317
 318         if (modules_sym)
 319                 sym_calc_value(modules_sym);
 320         return 0;
 321 }
 322
 323 int conf_read(const char *name)
 324 {
 325         struct symbol *sym, *choice_sym;
 326         struct property *prop;
 327         struct expr *e;
 328         int i, flags;
 329
 330         sym_set_change_count(0);
 331
 332         if (conf_read_simple(name, S_DEF_USER))
 333                 return 1;
 334
 335         for_all_symbols(i, sym) {
 336                 sym_calc_value(sym);
 337                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 338                         goto sym_ok;
 339                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 340                         /* check that calculated value agrees with saved value */
 341                         switch (sym->type) {
 342                         case S_BOOLEAN:
 343                         case S_TRISTATE:
 344                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
 345                                         break;
 346                                 if (!sym_is_choice(sym))
 347                                         goto sym_ok;
 348                         default:
 349                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
 350                                         goto sym_ok;
 351                                 break;
 352                         }
 353                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 354                         /* no previous value and not saved */
 355                         goto sym_ok;
 356                 conf_unsaved++;
 357                 /* maybe print value in verbose mode... */
 358         sym_ok:
 359                 if (!sym_is_choice(sym))
 360                         continue;
 361                 /* The choice symbol only has a set value (and thus is not new)
 362                  * if all its visible childs have values.
 363                  */
 364                 prop = sym_get_choice_prop(sym);
 365                 flags = sym->flags;
 366                 expr_list_for_each_sym(prop->expr, e, choice_sym)
 367                         if (choice_sym->visible != no)
 368                                 flags &= choice_sym->flags;
 369                 sym->flags &= flags | ~SYMBOL_DEF_USER;
 370         }
 371
 372         for_all_symbols(i, sym) {
 373                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 374                         /* Reset values of generates values, so they'll appear
 375                          * as new, if they should become visible, but that
 376                          * doesn't quite work if the Kconfig and the saved
 377                          * configuration disagree.
 378                          */
 379                         if (sym->visible == no && !conf_unsaved)
 380                                 sym->flags &= ~SYMBOL_DEF_USER;
 381                         switch (sym->type) {
 382                         case S_STRING:
 383                         case S_INT:
 384                         case S_HEX:
 385                                 /* Reset a string value if it's out of range */
 386                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
 387                                         break;
 388                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
 389                                 conf_unsaved++;
 390                                 break;
 391                         default:
 392                                 break;
 393                         }
 394                 }
 395         }
 396
 397         sym_add_change_count(conf_warnings || conf_unsaved);
 398
 399         return 0;
 400 }
 401
 402 /* Write a S_STRING */
 403 static void conf_write_string(bool headerfile, const char *name,
 404                               const char *str, FILE *out)
 405 {
 406         int l;
 407         if (headerfile)
 408                 fprintf(out, "#define CONFIG_%s \"", name);
 409         else
 410                 fprintf(out, "CONFIG_%s=\"", name);
 411
 412         while (1) {
 413                 l = strcspn(str, "\"\\");
 414                 if (l) {
 415                         fwrite(str, l, 1, out);
 416                         str += l;
 417                 }
 418                 if (!*str)
 419                         break;
 420                 fprintf(out, "\\%c", *str++);
 421         }
 422         fputs("\"\n", out);
 423 }
 424
 425 static void conf_write_symbol(struct symbol *sym, enum symbol_type type,
 426                               FILE *out, bool write_no)
 427 {
 428         const char *str;
 429
 430         switch (type) {
 431         case S_BOOLEAN:
 432         case S_TRISTATE:
 433                 switch (sym_get_tristate_value(sym)) {
 434                 case no:
 435                         if (write_no)
 436                                 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 437                         break;
 438                 case mod:
 439                         fprintf(out, "CONFIG_%s=m\n", sym->name);
 440                         break;
 441                 case yes:
 442                         fprintf(out, "CONFIG_%s=y\n", sym->name);
 443                         break;
 444                 }
 445                 break;
 446         case S_STRING:
 447                 conf_write_string(false, sym->name, sym_get_string_value(sym), out);
 448                 break;
 449         case S_HEX:
 450         case S_INT:
 451                 str = sym_get_string_value(sym);
 452                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 453                 break;
 454         case S_OTHER:
 455         case S_UNKNOWN:
 456                 break;
 457         }
 458 }
 459
 460 /*
 461  * Write out a minimal config.
 462  * All values that has default values are skipped as this is redundant.
 463  */
 464 int conf_write_defconfig(const char *filename)
 465 {
 466         struct symbol *sym;
 467         struct menu *menu;
 468         FILE *out;
 469
 470         out = fopen(filename, "w");
 471         if (!out)
 472                 return 1;
 473
 474         sym_clear_all_valid();
 475
 476         /* Traverse all menus to find all relevant symbols */
 477         menu = rootmenu.list;
 478
 479         while (menu != NULL)
 480         {
 481                 sym = menu->sym;
 482                 if (sym == NULL) {
 483                         if (!menu_is_visible(menu))
 484                                 goto next_menu;
 485                 } else if (!sym_is_choice(sym)) {
 486                         sym_calc_value(sym);
 487                         if (!(sym->flags & SYMBOL_WRITE))
 488                                 goto next_menu;
 489                         sym->flags &= ~SYMBOL_WRITE;
 490                         /* If we cannot change the symbol - skip */
 491                         if (!sym_is_changable(sym))
 492                                 goto next_menu;
 493                         /* If symbol equals to default value - skip */
 494                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
 495                                 goto next_menu;
 496
 497                         /*
 498                          * If symbol is a choice value and equals to the
 499                          * default for a choice - skip.
 500                          * But only if value equal to "y".
 501                          */
 502                         if (sym_is_choice_value(sym)) {
 503                                 struct symbol *cs;
 504                                 struct symbol *ds;
 505
 506                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
 507                                 ds = sym_choice_default(cs);
 508                                 if (sym == ds) {
 509                                         if ((sym->type == S_BOOLEAN ||
 510                                         sym->type == S_TRISTATE) &&
 511                                         sym_get_tristate_value(sym) == yes)
 512                                                 goto next_menu;
 513                                 }
 514                         }
 515                         conf_write_symbol(sym, sym->type, out, true);
 516                 }
 517 next_menu:
 518                 if (menu->list != NULL) {
 519                         menu = menu->list;
 520                 }
 521                 else if (menu->next != NULL) {
 522                         menu = menu->next;
 523                 } else {
 524                         while ((menu = menu->parent)) {
 525                                 if (menu->next != NULL) {
 526                                         menu = menu->next;
 527                                         break;
 528                                 }
 529                         }
 530                 }
 531         }
 532         fclose(out);
 533         return 0;
 534 }
 535
 536 int conf_write(const char *name)
 537 {
 538         FILE *out;
 539         struct symbol *sym;
 540         struct menu *menu;
 541         const char *basename;
 542         const char *str;
 543         char dirname[128], tmpname[128], newname[128];
 544         enum symbol_type type;
 545         time_t now;
 546         int use_timestamp = 1;
 547         char *env;
 548
 549         dirname[0] = 0;
 550         if (name && name[0]) {
 551                 struct stat st;
 552                 char *slash;
 553
 554                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 555                         strcpy(dirname, name);
 556                         strcat(dirname, "/");
 557                         basename = conf_get_configname();
 558                 } else if ((slash = strrchr(name, '/'))) {
 559                         int size = slash - name + 1;
 560                         memcpy(dirname, name, size);
 561                         dirname[size] = 0;
 562                         if (slash[1])
 563                                 basename = slash + 1;
 564                         else
 565                                 basename = conf_get_configname();
 566                 } else
 567                         basename = name;
 568         } else
 569                 basename = conf_get_configname();
 570
 571         sprintf(newname, "%s%s", dirname, basename);
 572         env = getenv("KCONFIG_OVERWRITECONFIG");
 573         if (!env || !*env) {
 574                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
 575                 out = fopen(tmpname, "w");
 576         } else {
 577                 *tmpname = 0;
 578                 out = fopen(newname, "w");
 579         }
 580         if (!out)
 581                 return 1;
 582
 583         sym = sym_lookup("KERNELVERSION", 0);
 584         sym_calc_value(sym);
 585         time(&now);
 586         env = getenv("KCONFIG_NOTIMESTAMP");
 587         if (env && *env)
 588                 use_timestamp = 0;
 589
 590         fprintf(out, _("#\n"
 591                        "# Automatically generated make config: don't edit\n"
 592                        "# Linux kernel version: %s\n"
 593                        "%s%s"
 594                        "#\n"),
 595                      sym_get_string_value(sym),
 596                      use_timestamp ? "# " : "",
 597                      use_timestamp ? ctime(&now) : "");
 598
 599         if (!conf_get_changed())
 600                 sym_clear_all_valid();
 601
 602         menu = rootmenu.list;
 603         while (menu) {
 604                 sym = menu->sym;
 605                 if (!sym) {
 606                         if (!menu_is_visible(menu))
 607                                 goto next;
 608                         str = menu_get_prompt(menu);
 609                         fprintf(out, "\n"
 610                                      "#\n"
 611                                      "# %s\n"
 612                                      "#\n", str);
 613                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 614                         sym_calc_value(sym);
 615                         if (!(sym->flags & SYMBOL_WRITE))
 616                                 goto next;
 617                         sym->flags &= ~SYMBOL_WRITE;
 618                         type = sym->type;
 619                         if (type == S_TRISTATE) {
 620                                 sym_calc_value(modules_sym);
 621                                 if (modules_sym->curr.tri == no)
 622                                         type = S_BOOLEAN;
 623                         }
 624                         /* Write config symbol to file */
 625                         conf_write_symbol(sym, type, out, true);
 626                 }
 627
 628 next:
 629                 if (menu->list) {
 630                         menu = menu->list;
 631                         continue;
 632                 }
 633                 if (menu->next)
 634                         menu = menu->next;
 635                 else while ((menu = menu->parent)) {
 636                         if (menu->next) {
 637                                 menu = menu->next;
 638                                 break;
 639                         }
 640                 }
 641         }
 642         fclose(out);
 643
 644         if (*tmpname) {
 645                 strcat(dirname, basename);
 646                 strcat(dirname, ".old");
 647                 rename(newname, dirname);
 648                 if (rename(tmpname, newname))
 649                         return 1;
 650         }
 651
 652         printf(_("#\n"
 653                  "# configuration written to %s\n"
 654                  "#\n"), newname);
 655
 656         sym_set_change_count(0);
 657
 658         return 0;
 659 }
 660
 661 static int conf_split_config(void)
 662 {
 663         const char *name;
 664         char path[128];
 665         char *s, *d, c;
 666         struct symbol *sym;
 667         struct stat sb;
 668         int res, i, fd;
 669
 670         name = conf_get_autoconfig_name();
 671         conf_read_simple(name, S_DEF_AUTO);
 672
 673         if (chdir("include/config"))
 674                 return 1;
 675
 676         res = 0;
 677         for_all_symbols(i, sym) {
 678                 sym_calc_value(sym);
 679                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 680                         continue;
 681                 if (sym->flags & SYMBOL_WRITE) {
 682                         if (sym->flags & SYMBOL_DEF_AUTO) {
 683                                 /*
 684                                  * symbol has old and new value,
 685                                  * so compare them...
 686                                  */
 687                                 switch (sym->type) {
 688                                 case S_BOOLEAN:
 689                                 case S_TRISTATE:
 690                                         if (sym_get_tristate_value(sym) ==
 691                                             sym->def[S_DEF_AUTO].tri)
 692                                                 continue;
 693                                         break;
 694                                 case S_STRING:
 695                                 case S_HEX:
 696                                 case S_INT:
 697                                         if (!strcmp(sym_get_string_value(sym),
 698                                                     sym->def[S_DEF_AUTO].val))
 699                                                 continue;
 700                                         break;
 701                                 default:
 702                                         break;
 703                                 }
 704                         } else {
 705                                 /*
 706                                  * If there is no old value, only 'no' (unset)
 707                                  * is allowed as new value.
 708                                  */
 709                                 switch (sym->type) {
 710                                 case S_BOOLEAN:
 711                                 case S_TRISTATE:
 712                                         if (sym_get_tristate_value(sym) == no)
 713                                                 continue;
 714                                         break;
 715                                 default:
 716                                         break;
 717                                 }
 718                         }
 719                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 720                         /* There is neither an old nor a new value. */
 721                         continue;
 722                 /* else
 723                  *      There is an old value, but no new value ('no' (unset)
 724                  *      isn't saved in auto.conf, so the old value is always
 725                  *      different from 'no').
 726                  */
 727
 728                 /* Replace all '_' and append ".h" */
 729                 s = sym->name;
 730                 d = path;
 731                 while ((c = *s++)) {
 732                         c = tolower(c);
 733                         *d++ = (c == '_') ? '/' : c;
 734                 }
 735                 strcpy(d, ".h");
 736
 737                 /* Assume directory path already exists. */
 738                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 739                 if (fd == -1) {
 740                         if (errno != ENOENT) {
 741                                 res = 1;
 742                                 break;
 743                         }
 744                         /*
 745                          * Create directory components,
 746                          * unless they exist already.
 747                          */
 748                         d = path;
 749                         while ((d = strchr(d, '/'))) {
 750                                 *d = 0;
 751                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 752                                         res = 1;
 753                                         goto out;
 754                                 }
 755                                 *d++ = '/';
 756                         }
 757                         /* Try it again. */
 758                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 759                         if (fd == -1) {
 760                                 res = 1;
 761                                 break;
 762                         }
 763                 }
 764                 close(fd);
 765         }
 766 out:
 767         if (chdir("../.."))
 768                 return 1;
 769
 770         return res;
 771 }
 772
 773 int conf_write_autoconf(void)
 774 {
 775         struct symbol *sym;
 776         const char *str;
 777         const char *name;
 778         FILE *out, *tristate, *out_h;
 779         time_t now;
 780         int i;
 781
 782         sym_clear_all_valid();
 783
 784         file_write_dep("include/config/auto.conf.cmd");
 785
 786         if (conf_split_config())
 787                 return 1;
 788
 789         out = fopen(".tmpconfig", "w");
 790         if (!out)
 791                 return 1;
 792
 793         tristate = fopen(".tmpconfig_tristate", "w");
 794         if (!tristate) {
 795                 fclose(out);
 796                 return 1;
 797         }
 798
 799         out_h = fopen(".tmpconfig.h", "w");
 800         if (!out_h) {
 801                 fclose(out);
 802                 fclose(tristate);
 803                 return 1;
 804         }
 805
 806         sym = sym_lookup("KERNELVERSION", 0);
 807         sym_calc_value(sym);
 808         time(&now);
 809         fprintf(out, "#\n"
 810                      "# Automatically generated make config: don't edit\n"
 811                      "# Linux kernel version: %s\n"
 812                      "# %s"
 813                      "#\n",
 814                      sym_get_string_value(sym), ctime(&now));
 815         fprintf(tristate, "#\n"
 816                           "# Automatically generated - do not edit\n"
 817                           "\n");
 818         fprintf(out_h, "/*\n"
 819                        " * Automatically generated C config: don't edit\n"
 820                        " * Linux kernel version: %s\n"
 821                        " * %s"
 822                        " */\n"
 823                        "#define AUTOCONF_INCLUDED\n",
 824                        sym_get_string_value(sym), ctime(&now));
 825
 826         for_all_symbols(i, sym) {
 827                 sym_calc_value(sym);
 828                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 829                         continue;
 830
 831                 /* write symbol to config file */
 832                 conf_write_symbol(sym, sym->type, out, false);
 833
 834                 /* update autoconf and tristate files */
 835                 switch (sym->type) {
 836                 case S_BOOLEAN:
 837                 case S_TRISTATE:
 838                         switch (sym_get_tristate_value(sym)) {
 839                         case no:
 840                                 break;
 841                         case mod:
 842                                 fprintf(tristate, "CONFIG_%s=M\n", sym->name);
 843                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 844                                 break;
 845                         case yes:
 846                                 if (sym->type == S_TRISTATE)
 847                                         fprintf(tristate, "CONFIG_%s=Y\n",
 848                                                         sym->name);
 849                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
 850                                 break;
 851                         }
 852                         break;
 853                 case S_STRING:
 854                         conf_write_string(true, sym->name, sym_get_string_value(sym), out_h);
 855                         break;
 856                 case S_HEX:
 857                         str = sym_get_string_value(sym);
 858                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 859                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 860                                 break;
 861                         }
 862                 case S_INT:
 863                         str = sym_get_string_value(sym);
 864                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
 865                         break;
 866                 default:
 867                         break;
 868                 }
 869         }
 870         fclose(out);
 871         fclose(tristate);
 872         fclose(out_h);
 873
 874         name = getenv("KCONFIG_AUTOHEADER");
 875         if (!name)
 876                 name = "include/generated/autoconf.h";
 877         if (rename(".tmpconfig.h", name))
 878                 return 1;
 879         name = getenv("KCONFIG_TRISTATE");
 880         if (!name)
 881                 name = "include/config/tristate.conf";
 882         if (rename(".tmpconfig_tristate", name))
 883                 return 1;
 884         name = conf_get_autoconfig_name();
 885         /*
 886          * This must be the last step, kbuild has a dependency on auto.conf
 887          * and this marks the successful completion of the previous steps.
 888          */
 889         if (rename(".tmpconfig", name))
 890                 return 1;
 891
 892         return 0;
 893 }
 894
 895 static int sym_change_count;
 896 static void (*conf_changed_callback)(void);
 897
 898 void sym_set_change_count(int count)
 899 {
 900         int _sym_change_count = sym_change_count;
 901         sym_change_count = count;
 902         if (conf_changed_callback &&
 903             (bool)_sym_change_count != (bool)count)
 904                 conf_changed_callback();
 905 }
 906
 907 void sym_add_change_count(int count)
 908 {
 909         sym_set_change_count(count + sym_change_count);
 910 }
 911
 912 bool conf_get_changed(void)
 913 {
 914         return sym_change_count;
 915 }
 916
 917 void conf_set_changed_callback(void (*fn)(void))
 918 {
 919         conf_changed_callback = fn;
 920 }
 921
 922
 923 void conf_set_all_new_symbols(enum conf_def_mode mode)
 924 {
 925         struct symbol *sym, *csym;
 926         struct property *prop;
 927         struct expr *e;
 928         int i, cnt, def;
 929
 930         for_all_symbols(i, sym) {
 931                 if (sym_has_value(sym))
 932                         continue;
 933                 switch (sym_get_type(sym)) {
 934                 case S_BOOLEAN:
 935                 case S_TRISTATE:
 936                         switch (mode) {
 937                         case def_yes:
 938                                 sym->def[S_DEF_USER].tri = yes;
 939                                 break;
 940                         case def_mod:
 941                                 sym->def[S_DEF_USER].tri = mod;
 942                                 break;
 943                         case def_no:
 944                                 sym->def[S_DEF_USER].tri = no;
 945                                 break;
 946                         case def_random:
 947                                 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
 948                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
 949                                 break;
 950                         default:
 951                                 continue;
 952                         }
 953                         if (!(sym_is_choice(sym) && mode == def_random))
 954                                 sym->flags |= SYMBOL_DEF_USER;
 955                         break;
 956                 default:
 957                         break;
 958                 }
 959
 960         }
 961
 962         sym_clear_all_valid();
 963
 964         if (mode != def_random)
 965                 return;
 966         /*
 967          * We have different type of choice blocks.
 968          * If curr.tri equal to mod then we can select several
 969          * choice symbols in one block.
 970          * In this case we do nothing.
 971          * If curr.tri equal yes then only one symbol can be
 972          * selected in a choice block and we set it to yes,
 973          * and the rest to no.
 974          */
 975         for_all_symbols(i, csym) {
 976                 if (sym_has_value(csym) || !sym_is_choice(csym))
 977                         continue;
 978
 979                 sym_calc_value(csym);
 980
 981                 if (csym->curr.tri != yes)
 982                         continue;
 983
 984                 prop = sym_get_choice_prop(csym);
 985
 986                 /* count entries in choice block */
 987                 cnt = 0;
 988                 expr_list_for_each_sym(prop->expr, e, sym)
 989                         cnt++;
 990
 991                 /*
 992                  * find a random value and set it to yes,
 993                  * set the rest to no so we have only one set
 994                  */
 995                 def = (rand() % cnt);
 996
 997                 cnt = 0;
 998                 expr_list_for_each_sym(prop->expr, e, sym) {
 999                         if (def == cnt++) {
1000                                 sym->def[S_DEF_USER].tri = yes;
1001                                 csym->def[S_DEF_USER].val = sym;
1002                         }
1003                         else {
1004                                 sym->def[S_DEF_USER].tri = no;
1005                         }
1006                 }
1007                 csym->flags |= SYMBOL_DEF_USER;
1008                 /* clear VALID to get value calculated */
1009                 csym->flags &= ~(SYMBOL_VALID);
1010         }
1011 }