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 <errno.h>
   9 #include <fcntl.h>
  10 #include <stdarg.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <time.h>
  15 #include <unistd.h>
  16
  17 #include "lkc.h"
  18
  19 static void conf_warning(const char *fmt, ...)
  20         __attribute__ ((format (printf, 1, 2)));
  21
  22 static void conf_message(const char *fmt, ...)
  23         __attribute__ ((format (printf, 1, 2)));
  24
  25 static const char *conf_filename;
  26 static int conf_lineno, conf_warnings, conf_unsaved;
  27
  28 const char conf_defname[] = "arch/$ARCH/defconfig";
  29
  30 static void conf_warning(const char *fmt, ...)
  31 {
  32         va_list ap;
  33         va_start(ap, fmt);
  34         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  35         vfprintf(stderr, fmt, ap);
  36         fprintf(stderr, "\n");
  37         va_end(ap);
  38         conf_warnings++;
  39 }
  40
  41 static void conf_default_message_callback(const char *fmt, va_list ap)
  42 {
  43         printf("#\n# ");
  44         vprintf(fmt, ap);
  45         printf("\n#\n");
  46 }
  47
  48 static void (*conf_message_callback) (const char *fmt, va_list ap) =
  49         conf_default_message_callback;
  50 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
  51 {
  52         conf_message_callback = fn;
  53 }
  54
  55 static void conf_message(const char *fmt, ...)
  56 {
  57         va_list ap;
  58
  59         va_start(ap, fmt);
  60         if (conf_message_callback)
  61                 conf_message_callback(fmt, ap);
  62 }
  63
  64 const char *conf_get_configname(void)
  65 {
  66         char *name = getenv("KCONFIG_CONFIG");
  67
  68         return name ? name : ".config";
  69 }
  70
  71 const char *conf_get_autoconfig_name(void)
  72 {
  73         char *name = getenv("KCONFIG_AUTOCONFIG");
  74
  75         return name ? name : "include/config/auto.conf";
  76 }
  77
  78 static char *conf_expand_value(const char *in)
  79 {
  80         struct symbol *sym;
  81         const char *src;
  82         static char res_value[SYMBOL_MAXLENGTH];
  83         char *dst, name[SYMBOL_MAXLENGTH];
  84
  85         res_value[0] = 0;
  86         dst = name;
  87         while ((src = strchr(in, '$'))) {
  88                 strncat(res_value, in, src - in);
  89                 src++;
  90                 dst = name;
  91                 while (isalnum(*src) || *src == '_')
  92                         *dst++ = *src++;
  93                 *dst = 0;
  94                 sym = sym_lookup(name, 0);
  95                 sym_calc_value(sym);
  96                 strcat(res_value, sym_get_string_value(sym));
  97                 in = src;
  98         }
  99         strcat(res_value, in);
 100
 101         return res_value;
 102 }
 103
 104 char *conf_get_default_confname(void)
 105 {
 106         struct stat buf;
 107         static char fullname[PATH_MAX+1];
 108         char *env, *name;
 109
 110         name = conf_expand_value(conf_defname);
 111         env = getenv(SRCTREE);
 112         if (env) {
 113                 sprintf(fullname, "%s/%s", env, name);
 114                 if (!stat(fullname, &buf))
 115                         return fullname;
 116         }
 117         return name;
 118 }
 119
 120 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
 121 {
 122         char *p2;
 123
 124         switch (sym->type) {
 125         case S_TRISTATE:
 126                 if (p[0] == 'm') {
 127                         sym->def[def].tri = mod;
 128                         sym->flags |= def_flags;
 129                         break;
 130                 }
 131                 /* fall through */
 132         case S_BOOLEAN:
 133                 if (p[0] == 'y') {
 134                         sym->def[def].tri = yes;
 135                         sym->flags |= def_flags;
 136                         break;
 137                 }
 138                 if (p[0] == 'n') {
 139                         sym->def[def].tri = no;
 140                         sym->flags |= def_flags;
 141                         break;
 142                 }
 143                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 144                 return 1;
 145         case S_OTHER:
 146                 if (*p != '"') {
 147                         for (p2 = p; *p2 && !isspace(*p2); p2++)
 148                                 ;
 149                         sym->type = S_STRING;
 150                         goto done;
 151                 }
 152                 /* fall through */
 153         case S_STRING:
 154                 if (*p++ != '"')
 155                         break;
 156                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 157                         if (*p2 == '"') {
 158                                 *p2 = 0;
 159                                 break;
 160                         }
 161                         memmove(p2, p2 + 1, strlen(p2));
 162                 }
 163                 if (!p2) {
 164                         conf_warning("invalid string found");
 165                         return 1;
 166                 }
 167                 /* fall through */
 168         case S_INT:
 169         case S_HEX:
 170         done:
 171                 if (sym_string_valid(sym, p)) {
 172                         sym->def[def].val = strdup(p);
 173                         sym->flags |= def_flags;
 174                 } else {
 175                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 176                         return 1;
 177                 }
 178                 break;
 179         default:
 180                 ;
 181         }
 182         return 0;
 183 }
 184
 185 int conf_read_simple(const char *name, int def)
 186 {
 187         FILE *in = NULL;
 188         char line[1024];
 189         char *p, *p2;
 190         struct symbol *sym;
 191         int i, def_flags;
 192
 193         if (name) {
 194                 in = zconf_fopen(name);
 195         } else {
 196                 struct property *prop;
 197
 198                 name = conf_get_configname();
 199                 in = zconf_fopen(name);
 200                 if (in)
 201                         goto load;
 202                 sym_add_change_count(1);
 203                 if (!sym_defconfig_list) {
 204                         if (modules_sym)
 205                                 sym_calc_value(modules_sym);
 206                         return 1;
 207                 }
 208
 209                 for_all_defaults(sym_defconfig_list, prop) {
 210                         if (expr_calc_value(prop->visible.expr) == no ||
 211                             prop->expr->type != E_SYMBOL)
 212                                 continue;
 213                         name = conf_expand_value(prop->expr->left.sym->name);
 214                         in = zconf_fopen(name);
 215                         if (in) {
 216                                 conf_message(_("using defaults found in %s"),
 217                                          name);
 218                                 goto load;
 219                         }
 220                 }
 221         }
 222         if (!in)
 223                 return 1;
 224
 225 load:
 226         conf_filename = name;
 227         conf_lineno = 0;
 228         conf_warnings = 0;
 229         conf_unsaved = 0;
 230
 231         def_flags = SYMBOL_DEF << def;
 232         for_all_symbols(i, sym) {
 233                 sym->flags |= SYMBOL_CHANGED;
 234                 sym->flags &= ~(def_flags|SYMBOL_VALID);
 235                 if (sym_is_choice(sym))
 236                         sym->flags |= def_flags;
 237                 switch (sym->type) {
 238                 case S_INT:
 239                 case S_HEX:
 240                 case S_STRING:
 241                         if (sym->def[def].val)
 242                                 free(sym->def[def].val);
 243                         /* fall through */
 244                 default:
 245                         sym->def[def].val = NULL;
 246                         sym->def[def].tri = no;
 247                 }
 248         }
 249
 250         while (fgets(line, sizeof(line), in)) {
 251                 conf_lineno++;
 252                 sym = NULL;
 253                 if (line[0] == '#') {
 254                         if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
 255                                 continue;
 256                         p = strchr(line + 2 + strlen(CONFIG_), ' ');
 257                         if (!p)
 258                                 continue;
 259                         *p++ = 0;
 260                         if (strncmp(p, "is not set", 10))
 261                                 continue;
 262                         if (def == S_DEF_USER) {
 263                                 sym = sym_find(line + 2 + strlen(CONFIG_));
 264                                 if (!sym) {
 265                                         sym_add_change_count(1);
 266                                         goto setsym;
 267                                 }
 268                         } else {
 269                                 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
 270                                 if (sym->type == S_UNKNOWN)
 271                                         sym->type = S_BOOLEAN;
 272                         }
 273                         if (sym->flags & def_flags) {
 274                                 conf_warning("override: reassigning to symbol %s", sym->name);
 275                         }
 276                         switch (sym->type) {
 277                         case S_BOOLEAN:
 278                         case S_TRISTATE:
 279                                 sym->def[def].tri = no;
 280                                 sym->flags |= def_flags;
 281                                 break;
 282                         default:
 283                                 ;
 284                         }
 285                 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
 286                         p = strchr(line + strlen(CONFIG_), '=');
 287                         if (!p)
 288                                 continue;
 289                         *p++ = 0;
 290                         p2 = strchr(p, '\n');
 291                         if (p2) {
 292                                 *p2-- = 0;
 293                                 if (*p2 == '\r')
 294                                         *p2 = 0;
 295                         }
 296                         if (def == S_DEF_USER) {
 297                                 sym = sym_find(line + strlen(CONFIG_));
 298                                 if (!sym) {
 299                                         sym_add_change_count(1);
 300                                         goto setsym;
 301                                 }
 302                         } else {
 303                                 sym = sym_lookup(line + strlen(CONFIG_), 0);
 304                                 if (sym->type == S_UNKNOWN)
 305                                         sym->type = S_OTHER;
 306                         }
 307                         if (sym->flags & def_flags) {
 308                                 conf_warning("override: reassigning to symbol %s", sym->name);
 309                         }
 310                         if (conf_set_sym_val(sym, def, def_flags, p))
 311                                 continue;
 312                 } else {
 313                         if (line[0] != '\r' && line[0] != '\n')
 314                                 conf_warning("unexpected data");
 315                         continue;
 316                 }
 317 setsym:
 318                 if (sym && sym_is_choice_value(sym)) {
 319                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 320                         switch (sym->def[def].tri) {
 321                         case no:
 322                                 break;
 323                         case mod:
 324                                 if (cs->def[def].tri == yes) {
 325                                         conf_warning("%s creates inconsistent choice state", sym->name);
 326                                         cs->flags &= ~def_flags;
 327                                 }
 328                                 break;
 329                         case yes:
 330                                 if (cs->def[def].tri != no)
 331                                         conf_warning("override: %s changes choice state", sym->name);
 332                                 cs->def[def].val = sym;
 333                                 break;
 334                         }
 335                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
 336                 }
 337         }
 338         fclose(in);
 339
 340         if (modules_sym)
 341                 sym_calc_value(modules_sym);
 342         return 0;
 343 }
 344
 345 int conf_read(const char *name)
 346 {
 347         struct symbol *sym;
 348         int i;
 349
 350         sym_set_change_count(0);
 351
 352         if (conf_read_simple(name, S_DEF_USER))
 353                 return 1;
 354
 355         for_all_symbols(i, sym) {
 356                 sym_calc_value(sym);
 357                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 358                         continue;
 359                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 360                         /* check that calculated value agrees with saved value */
 361                         switch (sym->type) {
 362                         case S_BOOLEAN:
 363                         case S_TRISTATE:
 364                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
 365                                         break;
 366                                 if (!sym_is_choice(sym))
 367                                         continue;
 368                                 /* fall through */
 369                         default:
 370                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
 371                                         continue;
 372                                 break;
 373                         }
 374                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 375                         /* no previous value and not saved */
 376                         continue;
 377                 conf_unsaved++;
 378                 /* maybe print value in verbose mode... */
 379         }
 380
 381         for_all_symbols(i, sym) {
 382                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 383                         /* Reset values of generates values, so they'll appear
 384                          * as new, if they should become visible, but that
 385                          * doesn't quite work if the Kconfig and the saved
 386                          * configuration disagree.
 387                          */
 388                         if (sym->visible == no && !conf_unsaved)
 389                                 sym->flags &= ~SYMBOL_DEF_USER;
 390                         switch (sym->type) {
 391                         case S_STRING:
 392                         case S_INT:
 393                         case S_HEX:
 394                                 /* Reset a string value if it's out of range */
 395                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
 396                                         break;
 397                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
 398                                 conf_unsaved++;
 399                                 break;
 400                         default:
 401                                 break;
 402                         }
 403                 }
 404         }
 405
 406         sym_add_change_count(conf_warnings || conf_unsaved);
 407
 408         return 0;
 409 }
 410
 411 /*
 412  * Kconfig configuration printer
 413  *
 414  * This printer is used when generating the resulting configuration after
 415  * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
 416  * passing a non-NULL argument to the printer.
 417  *
 418  */
 419 static void
 420 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 421 {
 422
 423         switch (sym->type) {
 424         case S_BOOLEAN:
 425         case S_TRISTATE:
 426                 if (*value == 'n') {
 427                         bool skip_unset = (arg != NULL);
 428
 429                         if (!skip_unset)
 430                                 fprintf(fp, "# %s%s is not set\n",
 431                                     CONFIG_, sym->name);
 432                         return;
 433                 }
 434                 break;
 435         default:
 436                 break;
 437         }
 438
 439         fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
 440 }
 441
 442 static void
 443 kconfig_print_comment(FILE *fp, const char *value, void *arg)
 444 {
 445         const char *p = value;
 446         size_t l;
 447
 448         for (;;) {
 449                 l = strcspn(p, "\n");
 450                 fprintf(fp, "#");
 451                 if (l) {
 452                         fprintf(fp, " ");
 453                         xfwrite(p, l, 1, fp);
 454                         p += l;
 455                 }
 456                 fprintf(fp, "\n");
 457                 if (*p++ == '\0')
 458                         break;
 459         }
 460 }
 461
 462 static struct conf_printer kconfig_printer_cb =
 463 {
 464         .print_symbol = kconfig_print_symbol,
 465         .print_comment = kconfig_print_comment,
 466 };
 467
 468 /*
 469  * Header printer
 470  *
 471  * This printer is used when generating the `include/generated/autoconf.h' file.
 472  */
 473 static void
 474 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 475 {
 476
 477         switch (sym->type) {
 478         case S_BOOLEAN:
 479         case S_TRISTATE: {
 480                 const char *suffix = "";
 481
 482                 switch (*value) {
 483                 case 'n':
 484                         break;
 485                 case 'm':
 486                         suffix = "_MODULE";
 487                         /* fall through */
 488                 default:
 489                         fprintf(fp, "#define %s%s%s 1\n",
 490                             CONFIG_, sym->name, suffix);
 491                 }
 492                 /*
 493                  * Generate the __enabled_CONFIG_* and
 494                  * __enabled_CONFIG_*_MODULE macros for use by the
 495                  * IS_{ENABLED,BUILTIN,MODULE} macros. The _MODULE variant is
 496                  * generated even for booleans so that the IS_ENABLED() macro
 497                  * works.
 498                  */
 499                 fprintf(fp, "#define __enabled_" CONFIG_ "%s %d\n",
 500                                 sym->name, (*value == 'y'));
 501                 fprintf(fp, "#define __enabled_" CONFIG_ "%s_MODULE %d\n",
 502                                 sym->name, (*value == 'm'));
 503                 break;
 504         }
 505         case S_HEX: {
 506                 const char *prefix = "";
 507
 508                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
 509                         prefix = "0x";
 510                 fprintf(fp, "#define %s%s %s%s\n",
 511                     CONFIG_, sym->name, prefix, value);
 512                 break;
 513         }
 514         case S_STRING:
 515         case S_INT:
 516                 fprintf(fp, "#define %s%s %s\n",
 517                     CONFIG_, sym->name, value);
 518                 break;
 519         default:
 520                 break;
 521         }
 522
 523 }
 524
 525 static void
 526 header_print_comment(FILE *fp, const char *value, void *arg)
 527 {
 528         const char *p = value;
 529         size_t l;
 530
 531         fprintf(fp, "/*\n");
 532         for (;;) {
 533                 l = strcspn(p, "\n");
 534                 fprintf(fp, " *");
 535                 if (l) {
 536                         fprintf(fp, " ");
 537                         xfwrite(p, l, 1, fp);
 538                         p += l;
 539                 }
 540                 fprintf(fp, "\n");
 541                 if (*p++ == '\0')
 542                         break;
 543         }
 544         fprintf(fp, " */\n");
 545 }
 546
 547 static struct conf_printer header_printer_cb =
 548 {
 549         .print_symbol = header_print_symbol,
 550         .print_comment = header_print_comment,
 551 };
 552
 553 /*
 554  * Tristate printer
 555  *
 556  * This printer is used when generating the `include/config/tristate.conf' file.
 557  */
 558 static void
 559 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 560 {
 561
 562         if (sym->type == S_TRISTATE && *value != 'n')
 563                 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
 564 }
 565
 566 static struct conf_printer tristate_printer_cb =
 567 {
 568         .print_symbol = tristate_print_symbol,
 569         .print_comment = kconfig_print_comment,
 570 };
 571
 572 static void conf_write_symbol(FILE *fp, struct symbol *sym,
 573                               struct conf_printer *printer, void *printer_arg)
 574 {
 575         const char *str;
 576
 577         switch (sym->type) {
 578         case S_OTHER:
 579         case S_UNKNOWN:
 580                 break;
 581         case S_STRING:
 582                 str = sym_get_string_value(sym);
 583                 str = sym_escape_string_value(str);
 584                 printer->print_symbol(fp, sym, str, printer_arg);
 585                 free((void *)str);
 586                 break;
 587         default:
 588                 str = sym_get_string_value(sym);
 589                 printer->print_symbol(fp, sym, str, printer_arg);
 590         }
 591 }
 592
 593 static void
 594 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
 595 {
 596         char buf[256];
 597
 598         snprintf(buf, sizeof(buf),
 599             "\n"
 600             "Automatically generated file; DO NOT EDIT.\n"
 601             "%s\n",
 602             rootmenu.prompt->text);
 603
 604         printer->print_comment(fp, buf, printer_arg);
 605 }
 606
 607 /*
 608  * Write out a minimal config.
 609  * All values that has default values are skipped as this is redundant.
 610  */
 611 int conf_write_defconfig(const char *filename)
 612 {
 613         struct symbol *sym;
 614         struct menu *menu;
 615         FILE *out;
 616
 617         out = fopen(filename, "w");
 618         if (!out)
 619                 return 1;
 620
 621         sym_clear_all_valid();
 622
 623         /* Traverse all menus to find all relevant symbols */
 624         menu = rootmenu.list;
 625
 626         while (menu != NULL)
 627         {
 628                 sym = menu->sym;
 629                 if (sym == NULL) {
 630                         if (!menu_is_visible(menu))
 631                                 goto next_menu;
 632                 } else if (!sym_is_choice(sym)) {
 633                         sym_calc_value(sym);
 634                         if (!(sym->flags & SYMBOL_WRITE))
 635                                 goto next_menu;
 636                         sym->flags &= ~SYMBOL_WRITE;
 637                         /* If we cannot change the symbol - skip */
 638                         if (!sym_is_changable(sym))
 639                                 goto next_menu;
 640                         /* If symbol equals to default value - skip */
 641                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
 642                                 goto next_menu;
 643
 644                         /*
 645                          * If symbol is a choice value and equals to the
 646                          * default for a choice - skip.
 647                          * But only if value is bool and equal to "y" and
 648                          * choice is not "optional".
 649                          * (If choice is "optional" then all values can be "n")
 650                          */
 651                         if (sym_is_choice_value(sym)) {
 652                                 struct symbol *cs;
 653                                 struct symbol *ds;
 654
 655                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
 656                                 ds = sym_choice_default(cs);
 657                                 if (!sym_is_optional(cs) && sym == ds) {
 658                                         if ((sym->type == S_BOOLEAN) &&
 659                                             sym_get_tristate_value(sym) == yes)
 660                                                 goto next_menu;
 661                                 }
 662                         }
 663                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 664                 }
 665 next_menu:
 666                 if (menu->list != NULL) {
 667                         menu = menu->list;
 668                 }
 669                 else if (menu->next != NULL) {
 670                         menu = menu->next;
 671                 } else {
 672                         while ((menu = menu->parent)) {
 673                                 if (menu->next != NULL) {
 674                                         menu = menu->next;
 675                                         break;
 676                                 }
 677                         }
 678                 }
 679         }
 680         fclose(out);
 681         return 0;
 682 }
 683
 684 int conf_write(const char *name)
 685 {
 686         FILE *out;
 687         struct symbol *sym;
 688         struct menu *menu;
 689         const char *basename;
 690         const char *str;
 691         char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
 692         char *env;
 693
 694         dirname[0] = 0;
 695         if (name && name[0]) {
 696                 struct stat st;
 697                 char *slash;
 698
 699                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 700                         strcpy(dirname, name);
 701                         strcat(dirname, "/");
 702                         basename = conf_get_configname();
 703                 } else if ((slash = strrchr(name, '/'))) {
 704                         int size = slash - name + 1;
 705                         memcpy(dirname, name, size);
 706                         dirname[size] = 0;
 707                         if (slash[1])
 708                                 basename = slash + 1;
 709                         else
 710                                 basename = conf_get_configname();
 711                 } else
 712                         basename = name;
 713         } else
 714                 basename = conf_get_configname();
 715
 716         sprintf(newname, "%s%s", dirname, basename);
 717         env = getenv("KCONFIG_OVERWRITECONFIG");
 718         if (!env || !*env) {
 719                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
 720                 out = fopen(tmpname, "w");
 721         } else {
 722                 *tmpname = 0;
 723                 out = fopen(newname, "w");
 724         }
 725         if (!out)
 726                 return 1;
 727
 728         conf_write_heading(out, &kconfig_printer_cb, NULL);
 729
 730         if (!conf_get_changed())
 731                 sym_clear_all_valid();
 732
 733         menu = rootmenu.list;
 734         while (menu) {
 735                 sym = menu->sym;
 736                 if (!sym) {
 737                         if (!menu_is_visible(menu))
 738                                 goto next;
 739                         str = menu_get_prompt(menu);
 740                         fprintf(out, "\n"
 741                                      "#\n"
 742                                      "# %s\n"
 743                                      "#\n", str);
 744                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 745                         sym_calc_value(sym);
 746                         if (!(sym->flags & SYMBOL_WRITE))
 747                                 goto next;
 748                         sym->flags &= ~SYMBOL_WRITE;
 749
 750                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 751                 }
 752
 753 next:
 754                 if (menu->list) {
 755                         menu = menu->list;
 756                         continue;
 757                 }
 758                 if (menu->next)
 759                         menu = menu->next;
 760                 else while ((menu = menu->parent)) {
 761                         if (menu->next) {
 762                                 menu = menu->next;
 763                                 break;
 764                         }
 765                 }
 766         }
 767         fclose(out);
 768
 769         if (*tmpname) {
 770                 strcat(dirname, basename);
 771                 strcat(dirname, ".old");
 772                 rename(newname, dirname);
 773                 if (rename(tmpname, newname))
 774                         return 1;
 775         }
 776
 777         conf_message(_("configuration written to %s"), newname);
 778
 779         sym_set_change_count(0);
 780
 781         return 0;
 782 }
 783
 784 static int conf_split_config(void)
 785 {
 786         const char *name;
 787         char path[PATH_MAX+1];
 788         char *s, *d, c;
 789         struct symbol *sym;
 790         struct stat sb;
 791         int res, i, fd;
 792
 793         name = conf_get_autoconfig_name();
 794         conf_read_simple(name, S_DEF_AUTO);
 795
 796         if (chdir("include/config"))
 797                 return 1;
 798
 799         res = 0;
 800         for_all_symbols(i, sym) {
 801                 sym_calc_value(sym);
 802                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 803                         continue;
 804                 if (sym->flags & SYMBOL_WRITE) {
 805                         if (sym->flags & SYMBOL_DEF_AUTO) {
 806                                 /*
 807                                  * symbol has old and new value,
 808                                  * so compare them...
 809                                  */
 810                                 switch (sym->type) {
 811                                 case S_BOOLEAN:
 812                                 case S_TRISTATE:
 813                                         if (sym_get_tristate_value(sym) ==
 814                                             sym->def[S_DEF_AUTO].tri)
 815                                                 continue;
 816                                         break;
 817                                 case S_STRING:
 818                                 case S_HEX:
 819                                 case S_INT:
 820                                         if (!strcmp(sym_get_string_value(sym),
 821                                                     sym->def[S_DEF_AUTO].val))
 822                                                 continue;
 823                                         break;
 824                                 default:
 825                                         break;
 826                                 }
 827                         } else {
 828                                 /*
 829                                  * If there is no old value, only 'no' (unset)
 830                                  * is allowed as new value.
 831                                  */
 832                                 switch (sym->type) {
 833                                 case S_BOOLEAN:
 834                                 case S_TRISTATE:
 835                                         if (sym_get_tristate_value(sym) == no)
 836                                                 continue;
 837                                         break;
 838                                 default:
 839                                         break;
 840                                 }
 841                         }
 842                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 843                         /* There is neither an old nor a new value. */
 844                         continue;
 845                 /* else
 846                  *      There is an old value, but no new value ('no' (unset)
 847                  *      isn't saved in auto.conf, so the old value is always
 848                  *      different from 'no').
 849                  */
 850
 851                 /* Replace all '_' and append ".h" */
 852                 s = sym->name;
 853                 d = path;
 854                 while ((c = *s++)) {
 855                         c = tolower(c);
 856                         *d++ = (c == '_') ? '/' : c;
 857                 }
 858                 strcpy(d, ".h");
 859
 860                 /* Assume directory path already exists. */
 861                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 862                 if (fd == -1) {
 863                         if (errno != ENOENT) {
 864                                 res = 1;
 865                                 break;
 866                         }
 867                         /*
 868                          * Create directory components,
 869                          * unless they exist already.
 870                          */
 871                         d = path;
 872                         while ((d = strchr(d, '/'))) {
 873                                 *d = 0;
 874                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 875                                         res = 1;
 876                                         goto out;
 877                                 }
 878                                 *d++ = '/';
 879                         }
 880                         /* Try it again. */
 881                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 882                         if (fd == -1) {
 883                                 res = 1;
 884                                 break;
 885                         }
 886                 }
 887                 close(fd);
 888         }
 889 out:
 890         if (chdir("../.."))
 891                 return 1;
 892
 893         return res;
 894 }
 895
 896 int conf_write_autoconf(void)
 897 {
 898         struct symbol *sym;
 899         const char *name;
 900         FILE *out, *tristate, *out_h;
 901         int i;
 902
 903         sym_clear_all_valid();
 904
 905         file_write_dep("include/config/auto.conf.cmd");
 906
 907         if (conf_split_config())
 908                 return 1;
 909
 910         out = fopen(".tmpconfig", "w");
 911         if (!out)
 912                 return 1;
 913
 914         tristate = fopen(".tmpconfig_tristate", "w");
 915         if (!tristate) {
 916                 fclose(out);
 917                 return 1;
 918         }
 919
 920         out_h = fopen(".tmpconfig.h", "w");
 921         if (!out_h) {
 922                 fclose(out);
 923                 fclose(tristate);
 924                 return 1;
 925         }
 926
 927         conf_write_heading(out, &kconfig_printer_cb, NULL);
 928
 929         conf_write_heading(tristate, &tristate_printer_cb, NULL);
 930
 931         conf_write_heading(out_h, &header_printer_cb, NULL);
 932
 933         for_all_symbols(i, sym) {
 934                 sym_calc_value(sym);
 935                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 936                         continue;
 937
 938                 /* write symbol to auto.conf, tristate and header files */
 939                 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
 940
 941                 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
 942
 943                 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
 944         }
 945         fclose(out);
 946         fclose(tristate);
 947         fclose(out_h);
 948
 949         name = getenv("KCONFIG_AUTOHEADER");
 950         if (!name)
 951                 name = "include/generated/autoconf.h";
 952         if (rename(".tmpconfig.h", name))
 953                 return 1;
 954         name = getenv("KCONFIG_TRISTATE");
 955         if (!name)
 956                 name = "include/config/tristate.conf";
 957         if (rename(".tmpconfig_tristate", name))
 958                 return 1;
 959         name = conf_get_autoconfig_name();
 960         /*
 961          * This must be the last step, kbuild has a dependency on auto.conf
 962          * and this marks the successful completion of the previous steps.
 963          */
 964         if (rename(".tmpconfig", name))
 965                 return 1;
 966
 967         return 0;
 968 }
 969
 970 static int sym_change_count;
 971 static void (*conf_changed_callback)(void);
 972
 973 void sym_set_change_count(int count)
 974 {
 975         int _sym_change_count = sym_change_count;
 976         sym_change_count = count;
 977         if (conf_changed_callback &&
 978             (bool)_sym_change_count != (bool)count)
 979                 conf_changed_callback();
 980 }
 981
 982 void sym_add_change_count(int count)
 983 {
 984         sym_set_change_count(count + sym_change_count);
 985 }
 986
 987 bool conf_get_changed(void)
 988 {
 989         return sym_change_count;
 990 }
 991
 992 void conf_set_changed_callback(void (*fn)(void))
 993 {
 994         conf_changed_callback = fn;
 995 }
 996
 997 static void randomize_choice_values(struct symbol *csym)
 998 {
 999         struct property *prop;
1000         struct symbol *sym;
1001         struct expr *e;
1002         int cnt, def;
1003
1004         /*
1005          * If choice is mod then we may have more items selected
1006          * and if no then no-one.
1007          * In both cases stop.
1008          */
1009         if (csym->curr.tri != yes)
1010                 return;
1011
1012         prop = sym_get_choice_prop(csym);
1013
1014         /* count entries in choice block */
1015         cnt = 0;
1016         expr_list_for_each_sym(prop->expr, e, sym)
1017                 cnt++;
1018
1019         /*
1020          * find a random value and set it to yes,
1021          * set the rest to no so we have only one set
1022          */
1023         def = (rand() % cnt);
1024
1025         cnt = 0;
1026         expr_list_for_each_sym(prop->expr, e, sym) {
1027                 if (def == cnt++) {
1028                         sym->def[S_DEF_USER].tri = yes;
1029                         csym->def[S_DEF_USER].val = sym;
1030                 }
1031                 else {
1032                         sym->def[S_DEF_USER].tri = no;
1033                 }
1034         }
1035         csym->flags |= SYMBOL_DEF_USER;
1036         /* clear VALID to get value calculated */
1037         csym->flags &= ~(SYMBOL_VALID);
1038 }
1039
1040 static void set_all_choice_values(struct symbol *csym)
1041 {
1042         struct property *prop;
1043         struct symbol *sym;
1044         struct expr *e;
1045
1046         prop = sym_get_choice_prop(csym);
1047
1048         /*
1049          * Set all non-assinged choice values to no
1050          */
1051         expr_list_for_each_sym(prop->expr, e, sym) {
1052                 if (!sym_has_value(sym))
1053                         sym->def[S_DEF_USER].tri = no;
1054         }
1055         csym->flags |= SYMBOL_DEF_USER;
1056         /* clear VALID to get value calculated */
1057         csym->flags &= ~(SYMBOL_VALID);
1058 }
1059
1060 void conf_set_all_new_symbols(enum conf_def_mode mode)
1061 {
1062         struct symbol *sym, *csym;
1063         int i, cnt;
1064
1065         for_all_symbols(i, sym) {
1066                 if (sym_has_value(sym))
1067                         continue;
1068                 switch (sym_get_type(sym)) {
1069                 case S_BOOLEAN:
1070                 case S_TRISTATE:
1071                         switch (mode) {
1072                         case def_yes:
1073                                 sym->def[S_DEF_USER].tri = yes;
1074                                 break;
1075                         case def_mod:
1076                                 sym->def[S_DEF_USER].tri = mod;
1077                                 break;
1078                         case def_no:
1079                                 sym->def[S_DEF_USER].tri = no;
1080                                 break;
1081                         case def_random:
1082                                 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1083                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1084                                 break;
1085                         default:
1086                                 continue;
1087                         }
1088                         if (!(sym_is_choice(sym) && mode == def_random))
1089                                 sym->flags |= SYMBOL_DEF_USER;
1090                         break;
1091                 default:
1092                         break;
1093                 }
1094
1095         }
1096
1097         sym_clear_all_valid();
1098
1099         /*
1100          * We have different type of choice blocks.
1101          * If curr.tri equals to mod then we can select several
1102          * choice symbols in one block.
1103          * In this case we do nothing.
1104          * If curr.tri equals yes then only one symbol can be
1105          * selected in a choice block and we set it to yes,
1106          * and the rest to no.
1107          */
1108         for_all_symbols(i, csym) {
1109                 if (sym_has_value(csym) || !sym_is_choice(csym))
1110                         continue;
1111
1112                 sym_calc_value(csym);
1113                 if (mode == def_random)
1114                         randomize_choice_values(csym);
1115                 else
1116                         set_all_choice_values(csym);
1117         }
1118 }