config/confdata.c

   1 /*
   2  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
   3  * Released under the terms of the GNU GPL v2.0.
   4  */
   5
   6 #include <sys/stat.h>
   7 #include <ctype.h>
   8 #include <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[] = "include/generated/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/generated/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_cmake_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 444 {
 445
 446         switch (sym->type) {
 447         case S_BOOLEAN:
 448         case S_TRISTATE:
 449                 if (*value == 'n') {
 450                         bool skip_unset = (arg != NULL);
 451
 452                         if (!skip_unset)
 453                                 fprintf(fp, "set(%s%s false)\n",
 454                                         CONFIG_, sym->name, value);
 455                         return;
 456                 } else if (*value == 'm') {
 457                         abort();
 458                 } else {
 459                         fprintf(fp, "set(%s%s true)\n", CONFIG_, sym->name, value);
 460                 }
 461                 break;
 462         case S_HEX: {
 463                 const char *prefix = "";
 464
 465                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
 466                         prefix = "0x";
 467                 fprintf(fp, "set(%s%s %s%s)\n",
 468                     CONFIG_, sym->name, prefix, value);
 469                 break;
 470         }
 471         case S_STRING:
 472         case S_INT:
 473                 fprintf(fp, "set(%s%s %s)\n",
 474                     CONFIG_, sym->name, value);
 475                 break;
 476         default:
 477                 break;
 478         }
 479
 480 }
 481
 482 static void
 483 kconfig_print_comment(FILE *fp, const char *value, void *arg)
 484 {
 485         const char *p = value;
 486         size_t l;
 487
 488         for (;;) {
 489                 l = strcspn(p, "\n");
 490                 fprintf(fp, "#");
 491                 if (l) {
 492                         fprintf(fp, " ");
 493                         xfwrite(p, l, 1, fp);
 494                         p += l;
 495                 }
 496                 fprintf(fp, "\n");
 497                 if (*p++ == '\0')
 498                         break;
 499         }
 500 }
 501
 502 static struct conf_printer kconfig_printer_cb =
 503 {
 504         .print_symbol = kconfig_print_symbol,
 505         .print_comment = kconfig_print_comment,
 506 };
 507
 508 static struct conf_printer kconfig_printer_cmake_cb =
 509 {
 510         .print_symbol = kconfig_print_cmake_symbol,
 511         .print_comment = kconfig_print_comment,
 512 };
 513
 514 /*
 515  * Header printer
 516  *
 517  * This printer is used when generating the `include/generated/autoconf.h' file.
 518  */
 519 static void
 520 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 521 {
 522
 523         switch (sym->type) {
 524         case S_BOOLEAN:
 525         case S_TRISTATE: {
 526                 const char *suffix = "";
 527
 528                 switch (*value) {
 529                 case 'n':
 530                         break;
 531                 case 'm':
 532                         suffix = "_MODULE";
 533                         /* fall through */
 534                 default:
 535                         fprintf(fp, "#define %s%s%s 1\n",
 536                             CONFIG_, sym->name, suffix);
 537                 }
 538                 break;
 539         }
 540         case S_HEX: {
 541                 const char *prefix = "";
 542
 543                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
 544                         prefix = "0x";
 545                 fprintf(fp, "#define %s%s %s%s\n",
 546                     CONFIG_, sym->name, prefix, value);
 547                 break;
 548         }
 549         case S_STRING:
 550         case S_INT:
 551                 fprintf(fp, "#define %s%s %s\n",
 552                     CONFIG_, sym->name, value);
 553                 break;
 554         default:
 555                 break;
 556         }
 557
 558 }
 559
 560 static void
 561 header_print_comment(FILE *fp, const char *value, void *arg)
 562 {
 563         const char *p = value;
 564         size_t l;
 565
 566         fprintf(fp, "/*\n");
 567         for (;;) {
 568                 l = strcspn(p, "\n");
 569                 fprintf(fp, " *");
 570                 if (l) {
 571                         fprintf(fp, " ");
 572                         xfwrite(p, l, 1, fp);
 573                         p += l;
 574                 }
 575                 fprintf(fp, "\n");
 576                 if (*p++ == '\0')
 577                         break;
 578         }
 579         fprintf(fp, " */\n");
 580 }
 581
 582 static struct conf_printer header_printer_cb =
 583 {
 584         .print_symbol = header_print_symbol,
 585         .print_comment = header_print_comment,
 586 };
 587
 588 /*
 589  * Tristate printer
 590  *
 591  * This printer is used when generating the `include/generated/tristate.conf' file.
 592  */
 593 static void
 594 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 595 {
 596
 597         if (sym->type == S_TRISTATE && *value != 'n')
 598                 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
 599 }
 600
 601 static struct conf_printer tristate_printer_cb =
 602 {
 603         .print_symbol = tristate_print_symbol,
 604         .print_comment = kconfig_print_comment,
 605 };
 606
 607 static void conf_write_symbol(FILE *fp, struct symbol *sym,
 608                               struct conf_printer *printer, void *printer_arg)
 609 {
 610         const char *str;
 611
 612         switch (sym->type) {
 613         case S_OTHER:
 614         case S_UNKNOWN:
 615                 break;
 616         case S_STRING:
 617                 str = sym_get_string_value(sym);
 618                 str = sym_escape_string_value(str);
 619                 printer->print_symbol(fp, sym, str, printer_arg);
 620                 free((void *)str);
 621                 break;
 622         default:
 623                 str = sym_get_string_value(sym);
 624                 printer->print_symbol(fp, sym, str, printer_arg);
 625         }
 626 }
 627
 628 static void
 629 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
 630 {
 631         char buf[256];
 632
 633         snprintf(buf, sizeof(buf),
 634             "\n"
 635             "Automatically generated file; DO NOT EDIT.\n"
 636             "%s\n",
 637             rootmenu.prompt->text);
 638
 639         printer->print_comment(fp, buf, printer_arg);
 640 }
 641
 642 /*
 643  * Write out a minimal config.
 644  * All values that has default values are skipped as this is redundant.
 645  */
 646 int conf_write_defconfig(const char *filename)
 647 {
 648         struct symbol *sym;
 649         struct menu *menu;
 650         FILE *out;
 651
 652         out = fopen(filename, "w");
 653         if (!out)
 654                 return 1;
 655
 656         sym_clear_all_valid();
 657
 658         /* Traverse all menus to find all relevant symbols */
 659         menu = rootmenu.list;
 660
 661         while (menu != NULL)
 662         {
 663                 sym = menu->sym;
 664                 if (sym == NULL) {
 665                         if (!menu_is_visible(menu))
 666                                 goto next_menu;
 667                 } else if (!sym_is_choice(sym)) {
 668                         sym_calc_value(sym);
 669                         if (!(sym->flags & SYMBOL_WRITE))
 670                                 goto next_menu;
 671                         sym->flags &= ~SYMBOL_WRITE;
 672                         /* If we cannot change the symbol - skip */
 673                         if (!sym_is_changable(sym))
 674                                 goto next_menu;
 675                         /* If symbol equals to default value - skip */
 676                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
 677                                 goto next_menu;
 678
 679                         /*
 680                          * If symbol is a choice value and equals to the
 681                          * default for a choice - skip.
 682                          * But only if value is bool and equal to "y" and
 683                          * choice is not "optional".
 684                          * (If choice is "optional" then all values can be "n")
 685                          */
 686                         if (sym_is_choice_value(sym)) {
 687                                 struct symbol *cs;
 688                                 struct symbol *ds;
 689
 690                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
 691                                 ds = sym_choice_default(cs);
 692                                 if (!sym_is_optional(cs) && sym == ds) {
 693                                         if ((sym->type == S_BOOLEAN) &&
 694                                             sym_get_tristate_value(sym) == yes)
 695                                                 goto next_menu;
 696                                 }
 697                         }
 698                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 699                 }
 700 next_menu:
 701                 if (menu->list != NULL) {
 702                         menu = menu->list;
 703                 }
 704                 else if (menu->next != NULL) {
 705                         menu = menu->next;
 706                 } else {
 707                         while ((menu = menu->parent)) {
 708                                 if (menu->next != NULL) {
 709                                         menu = menu->next;
 710                                         break;
 711                                 }
 712                         }
 713                 }
 714         }
 715         fclose(out);
 716         return 0;
 717 }
 718
 719 int conf_write(const char *name)
 720 {
 721         FILE *out;
 722         struct symbol *sym;
 723         struct menu *menu;
 724         const char *basename;
 725         const char *str;
 726         char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
 727         char *env;
 728
 729         dirname[0] = 0;
 730         if (name && name[0]) {
 731                 struct stat st;
 732                 char *slash;
 733
 734                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 735                         strcpy(dirname, name);
 736                         strcat(dirname, "/");
 737                         basename = conf_get_configname();
 738                 } else if ((slash = strrchr(name, '/'))) {
 739                         int size = slash - name + 1;
 740                         memcpy(dirname, name, size);
 741                         dirname[size] = 0;
 742                         if (slash[1])
 743                                 basename = slash + 1;
 744                         else
 745                                 basename = conf_get_configname();
 746                 } else
 747                         basename = name;
 748         } else
 749                 basename = conf_get_configname();
 750
 751         sprintf(newname, "%s%s", dirname, basename);
 752         env = getenv("KCONFIG_OVERWRITECONFIG");
 753         if (!env || !*env) {
 754                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
 755                 out = fopen(tmpname, "w");
 756         } else {
 757                 *tmpname = 0;
 758                 out = fopen(newname, "w");
 759         }
 760         if (!out)
 761                 return 1;
 762
 763         conf_write_heading(out, &kconfig_printer_cb, NULL);
 764
 765         if (!conf_get_changed())
 766                 sym_clear_all_valid();
 767
 768         menu = rootmenu.list;
 769         while (menu) {
 770                 sym = menu->sym;
 771                 if (!sym) {
 772                         if (!menu_is_visible(menu))
 773                                 goto next;
 774                         str = menu_get_prompt(menu);
 775                         fprintf(out, "\n"
 776                                      "#\n"
 777                                      "# %s\n"
 778                                      "#\n", str);
 779                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 780                         sym_calc_value(sym);
 781                         if (!(sym->flags & SYMBOL_WRITE))
 782                                 goto next;
 783                         sym->flags &= ~SYMBOL_WRITE;
 784
 785                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 786                 }
 787
 788 next:
 789                 if (menu->list) {
 790                         menu = menu->list;
 791                         continue;
 792                 }
 793                 if (menu->next)
 794                         menu = menu->next;
 795                 else while ((menu = menu->parent)) {
 796                         if (menu->next) {
 797                                 menu = menu->next;
 798                                 break;
 799                         }
 800                 }
 801         }
 802         fclose(out);
 803
 804         if (*tmpname) {
 805                 strcat(dirname, basename);
 806                 strcat(dirname, ".old");
 807                 rename(newname, dirname);
 808                 if (rename(tmpname, newname))
 809                         return 1;
 810         }
 811
 812         conf_message(_("configuration written to %s"), newname);
 813
 814         sym_set_change_count(0);
 815
 816         return 0;
 817 }
 818
 819 static int conf_split_config(void)
 820 {
 821         const char *name;
 822         char path[PATH_MAX+1];
 823         char *s, *d, c;
 824         struct symbol *sym;
 825         struct stat sb;
 826         int res, i, fd;
 827
 828         name = conf_get_autoconfig_name();
 829         conf_read_simple(name, S_DEF_AUTO);
 830
 831         if (chdir("include/generated"))
 832                 return 1;
 833
 834         res = 0;
 835         for_all_symbols(i, sym) {
 836                 sym_calc_value(sym);
 837                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 838                         continue;
 839                 if (sym->flags & SYMBOL_WRITE) {
 840                         if (sym->flags & SYMBOL_DEF_AUTO) {
 841                                 /*
 842                                  * symbol has old and new value,
 843                                  * so compare them...
 844                                  */
 845                                 switch (sym->type) {
 846                                 case S_BOOLEAN:
 847                                 case S_TRISTATE:
 848                                         if (sym_get_tristate_value(sym) ==
 849                                             sym->def[S_DEF_AUTO].tri)
 850                                                 continue;
 851                                         break;
 852                                 case S_STRING:
 853                                 case S_HEX:
 854                                 case S_INT:
 855                                         if (!strcmp(sym_get_string_value(sym),
 856                                                     sym->def[S_DEF_AUTO].val))
 857                                                 continue;
 858                                         break;
 859                                 default:
 860                                         break;
 861                                 }
 862                         } else {
 863                                 /*
 864                                  * If there is no old value, only 'no' (unset)
 865                                  * is allowed as new value.
 866                                  */
 867                                 switch (sym->type) {
 868                                 case S_BOOLEAN:
 869                                 case S_TRISTATE:
 870                                         if (sym_get_tristate_value(sym) == no)
 871                                                 continue;
 872                                         break;
 873                                 default:
 874                                         break;
 875                                 }
 876                         }
 877                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 878                         /* There is neither an old nor a new value. */
 879                         continue;
 880                 /* else
 881                  *      There is an old value, but no new value ('no' (unset)
 882                  *      isn't saved in auto.conf, so the old value is always
 883                  *      different from 'no').
 884                  */
 885
 886                 /* Replace all '_' and append ".h" */
 887                 s = sym->name;
 888                 d = path;
 889                 while ((c = *s++)) {
 890                         c = tolower(c);
 891                         *d++ = (c == '_') ? '/' : c;
 892                 }
 893                 strcpy(d, ".h");
 894
 895                 /* Assume directory path already exists. */
 896                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 897                 if (fd == -1) {
 898                         if (errno != ENOENT) {
 899                                 res = 1;
 900                                 break;
 901                         }
 902                         /*
 903                          * Create directory components,
 904                          * unless they exist already.
 905                          */
 906                         d = path;
 907                         while ((d = strchr(d, '/'))) {
 908                                 *d = 0;
 909                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 910                                         res = 1;
 911                                         goto out;
 912                                 }
 913                                 *d++ = '/';
 914                         }
 915                         /* Try it again. */
 916                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 917                         if (fd == -1) {
 918                                 res = 1;
 919                                 break;
 920                         }
 921                 }
 922                 close(fd);
 923         }
 924 out:
 925         if (chdir("../.."))
 926                 return 1;
 927
 928         return res;
 929 }
 930
 931 int conf_write_autoconf(void)
 932 {
 933         struct symbol *sym;
 934         const char *name;
 935         FILE *out, *tristate, *out_h, *out_c;
 936         int i;
 937
 938         sym_clear_all_valid();
 939
 940         file_write_dep("include/generated/auto.conf.cmd");
 941
 942         if (conf_split_config())
 943                 return 1;
 944
 945         out = fopen(".tmpconfig", "w");
 946         if (!out)
 947                 return 1;
 948
 949         tristate = fopen(".tmpconfig_tristate", "w");
 950         if (!tristate) {
 951                 fclose(out);
 952                 return 1;
 953         }
 954
 955         out_h = fopen(".tmpconfig.h", "w");
 956         if (!out_h) {
 957                 fclose(out);
 958                 fclose(tristate);
 959                 return 1;
 960         }
 961
 962         out_c = fopen(".tmpconfig.cmake", "w");
 963         if (!out_c) {
 964                 fclose(out);
 965                 fclose(tristate);
 966                 fclose(out_h);
 967         }
 968
 969         conf_write_heading(out, &kconfig_printer_cb, NULL);
 970
 971         conf_write_heading(tristate, &tristate_printer_cb, NULL);
 972
 973         conf_write_heading(out_h, &header_printer_cb, NULL);
 974
 975         conf_write_heading(out_c, &kconfig_printer_cmake_cb, NULL);
 976
 977         for_all_symbols(i, sym) {
 978                 sym_calc_value(sym);
 979                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 980                         continue;
 981
 982                 /* write symbol to auto.conf, tristate and header files */
 983                 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
 984
 985                 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
 986
 987                 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
 988
 989                 conf_write_symbol(out_c, sym, &kconfig_printer_cmake_cb, NULL);
 990         }
 991         fclose(out);
 992         fclose(tristate);
 993         fclose(out_h);
 994         fclose(out_c);
 995
 996         name = getenv("KCONFIG_AUTOHEADER");
 997         if (!name)
 998                 name = "include/generated/autoconf.h";
 999         if (rename(".tmpconfig.h", name))
1000                 return 1;
1001         name = getenv("KCONFIG_TRISTATE");
1002         if (!name)
1003                 name = "include/generated/tristate.conf";
1004         if (rename(".tmpconfig_tristate", name))
1005                 return 1;
1006         name = getenv("KCONFIG_CMAKE");
1007         if (!name)
1008                 name = "config.cmake";
1009         if (rename(".tmpconfig.cmake", name))
1010                 return 1;
1011         name = conf_get_autoconfig_name();
1012         /*
1013          * This must be the last step, kbuild has a dependency on auto.conf
1014          * and this marks the successful completion of the previous steps.
1015          */
1016         if (rename(".tmpconfig", name))
1017                 return 1;
1018
1019         return 0;
1020 }
1021
1022 static int sym_change_count;
1023 static void (*conf_changed_callback)(void);
1024
1025 void sym_set_change_count(int count)
1026 {
1027         int _sym_change_count = sym_change_count;
1028         sym_change_count = count;
1029         if (conf_changed_callback &&
1030             (bool)_sym_change_count != (bool)count)
1031                 conf_changed_callback();
1032 }
1033
1034 void sym_add_change_count(int count)
1035 {
1036         sym_set_change_count(count + sym_change_count);
1037 }
1038
1039 bool conf_get_changed(void)
1040 {
1041         return sym_change_count;
1042 }
1043
1044 void conf_set_changed_callback(void (*fn)(void))
1045 {
1046         conf_changed_callback = fn;
1047 }
1048
1049 static void randomize_choice_values(struct symbol *csym)
1050 {
1051         struct property *prop;
1052         struct symbol *sym;
1053         struct expr *e;
1054         int cnt, def;
1055
1056         /*
1057          * If choice is mod then we may have more items selected
1058          * and if no then no-one.
1059          * In both cases stop.
1060          */
1061         if (csym->curr.tri != yes)
1062                 return;
1063
1064         prop = sym_get_choice_prop(csym);
1065
1066         /* count entries in choice block */
1067         cnt = 0;
1068         expr_list_for_each_sym(prop->expr, e, sym)
1069                 cnt++;
1070
1071         /*
1072          * find a random value and set it to yes,
1073          * set the rest to no so we have only one set
1074          */
1075         def = (rand() % cnt);
1076
1077         cnt = 0;
1078         expr_list_for_each_sym(prop->expr, e, sym) {
1079                 if (def == cnt++) {
1080                         sym->def[S_DEF_USER].tri = yes;
1081                         csym->def[S_DEF_USER].val = sym;
1082                 }
1083                 else {
1084                         sym->def[S_DEF_USER].tri = no;
1085                 }
1086         }
1087         csym->flags |= SYMBOL_DEF_USER;
1088         /* clear VALID to get value calculated */
1089         csym->flags &= ~(SYMBOL_VALID);
1090 }
1091
1092 static void set_all_choice_values(struct symbol *csym)
1093 {
1094         struct property *prop;
1095         struct symbol *sym;
1096         struct expr *e;
1097
1098         prop = sym_get_choice_prop(csym);
1099
1100         /*
1101          * Set all non-assinged choice values to no
1102          */
1103         expr_list_for_each_sym(prop->expr, e, sym) {
1104                 if (!sym_has_value(sym))
1105                         sym->def[S_DEF_USER].tri = no;
1106         }
1107         csym->flags |= SYMBOL_DEF_USER;
1108         /* clear VALID to get value calculated */
1109         csym->flags &= ~(SYMBOL_VALID);
1110 }
1111
1112 void conf_set_all_new_symbols(enum conf_def_mode mode)
1113 {
1114         struct symbol *sym, *csym;
1115         int i, cnt;
1116
1117         for_all_symbols(i, sym) {
1118                 if (sym_has_value(sym))
1119                         continue;
1120                 switch (sym_get_type(sym)) {
1121                 case S_BOOLEAN:
1122                 case S_TRISTATE:
1123                         switch (mode) {
1124                         case def_yes:
1125                                 sym->def[S_DEF_USER].tri = yes;
1126                                 break;
1127                         case def_mod:
1128                                 sym->def[S_DEF_USER].tri = mod;
1129                                 break;
1130                         case def_no:
1131                                 sym->def[S_DEF_USER].tri = no;
1132                                 break;
1133                         case def_random:
1134                                 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1135                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1136                                 break;
1137                         default:
1138                                 continue;
1139                         }
1140                         if (!(sym_is_choice(sym) && mode == def_random))
1141                                 sym->flags |= SYMBOL_DEF_USER;
1142                         break;
1143                 default:
1144                         break;
1145                 }
1146
1147         }
1148
1149         sym_clear_all_valid();
1150
1151         /*
1152          * We have different type of choice blocks.
1153          * If curr.tri equals to mod then we can select several
1154          * choice symbols in one block.
1155          * In this case we do nothing.
1156          * If curr.tri equals yes then only one symbol can be
1157          * selected in a choice block and we set it to yes,
1158          * and the rest to no.
1159          */
1160         for_all_symbols(i, csym) {
1161                 if (sym_has_value(csym) || !sym_is_choice(csym))
1162                         continue;
1163
1164                 sym_calc_value(csym);
1165                 if (mode == def_random)
1166                         randomize_choice_values(csym);
1167                 else
1168                         set_all_choice_values(csym);
1169         }
1170 }