git.sur5r.net Git - kconfig-frontends/blob - libs/parser/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                 break;
 493         }
 494         case S_HEX: {
 495                 const char *prefix = "";
 496
 497                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
 498                         prefix = "0x";
 499                 fprintf(fp, "#define %s%s %s%s\n",
 500                     CONFIG_, sym->name, prefix, value);
 501                 break;
 502         }
 503         case S_STRING:
 504         case S_INT:
 505                 fprintf(fp, "#define %s%s %s\n",
 506                     CONFIG_, sym->name, value);
 507                 break;
 508         default:
 509                 break;
 510         }
 511
 512 }
 513
 514 static void
 515 header_print_comment(FILE *fp, const char *value, void *arg)
 516 {
 517         const char *p = value;
 518         size_t l;
 519
 520         fprintf(fp, "/*\n");
 521         for (;;) {
 522                 l = strcspn(p, "\n");
 523                 fprintf(fp, " *");
 524                 if (l) {
 525                         fprintf(fp, " ");
 526                         xfwrite(p, l, 1, fp);
 527                         p += l;
 528                 }
 529                 fprintf(fp, "\n");
 530                 if (*p++ == '\0')
 531                         break;
 532         }
 533         fprintf(fp, " */\n");
 534 }
 535
 536 static struct conf_printer header_printer_cb =
 537 {
 538         .print_symbol = header_print_symbol,
 539         .print_comment = header_print_comment,
 540 };
 541
 542 /*
 543  * Generate the __enabled_CONFIG_* and __enabled_CONFIG_*_MODULE macros for
 544  * use by the IS_{ENABLED,BUILTIN,MODULE} macros. The _MODULE variant is
 545  * generated even for booleans so that the IS_ENABLED() macro works.
 546  */
 547 static void
 548 header_print__enabled_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 549 {
 550
 551         switch (sym->type) {
 552         case S_BOOLEAN:
 553         case S_TRISTATE: {
 554                 fprintf(fp, "#define __enabled_" CONFIG_ "%s %d\n",
 555                     sym->name, (*value == 'y'));
 556                 fprintf(fp, "#define __enabled_" CONFIG_ "%s_MODULE %d\n",
 557                     sym->name, (*value == 'm'));
 558                 break;
 559         }
 560         default:
 561                 break;
 562         }
 563 }
 564
 565 static struct conf_printer header__enabled_printer_cb =
 566 {
 567         .print_symbol = header_print__enabled_symbol,
 568         .print_comment = header_print_comment,
 569 };
 570
 571 /*
 572  * Tristate printer
 573  *
 574  * This printer is used when generating the `include/config/tristate.conf' file.
 575  */
 576 static void
 577 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 578 {
 579
 580         if (sym->type == S_TRISTATE && *value != 'n')
 581                 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
 582 }
 583
 584 static struct conf_printer tristate_printer_cb =
 585 {
 586         .print_symbol = tristate_print_symbol,
 587         .print_comment = kconfig_print_comment,
 588 };
 589
 590 static void conf_write_symbol(FILE *fp, struct symbol *sym,
 591                               struct conf_printer *printer, void *printer_arg)
 592 {
 593         const char *str;
 594
 595         switch (sym->type) {
 596         case S_OTHER:
 597         case S_UNKNOWN:
 598                 break;
 599         case S_STRING:
 600                 str = sym_get_string_value(sym);
 601                 str = sym_escape_string_value(str);
 602                 printer->print_symbol(fp, sym, str, printer_arg);
 603                 free((void *)str);
 604                 break;
 605         default:
 606                 str = sym_get_string_value(sym);
 607                 printer->print_symbol(fp, sym, str, printer_arg);
 608         }
 609 }
 610
 611 static void
 612 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
 613 {
 614         char buf[256];
 615
 616         snprintf(buf, sizeof(buf),
 617             "\n"
 618             "Automatically generated file; DO NOT EDIT.\n"
 619             "%s\n",
 620             rootmenu.prompt->text);
 621
 622         printer->print_comment(fp, buf, printer_arg);
 623 }
 624
 625 /*
 626  * Write out a minimal config.
 627  * All values that has default values are skipped as this is redundant.
 628  */
 629 int conf_write_defconfig(const char *filename)
 630 {
 631         struct symbol *sym;
 632         struct menu *menu;
 633         FILE *out;
 634
 635         out = fopen(filename, "w");
 636         if (!out)
 637                 return 1;
 638
 639         sym_clear_all_valid();
 640
 641         /* Traverse all menus to find all relevant symbols */
 642         menu = rootmenu.list;
 643
 644         while (menu != NULL)
 645         {
 646                 sym = menu->sym;
 647                 if (sym == NULL) {
 648                         if (!menu_is_visible(menu))
 649                                 goto next_menu;
 650                 } else if (!sym_is_choice(sym)) {
 651                         sym_calc_value(sym);
 652                         if (!(sym->flags & SYMBOL_WRITE))
 653                                 goto next_menu;
 654                         sym->flags &= ~SYMBOL_WRITE;
 655                         /* If we cannot change the symbol - skip */
 656                         if (!sym_is_changable(sym))
 657                                 goto next_menu;
 658                         /* If symbol equals to default value - skip */
 659                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
 660                                 goto next_menu;
 661
 662                         /*
 663                          * If symbol is a choice value and equals to the
 664                          * default for a choice - skip.
 665                          * But only if value is bool and equal to "y" and
 666                          * choice is not "optional".
 667                          * (If choice is "optional" then all values can be "n")
 668                          */
 669                         if (sym_is_choice_value(sym)) {
 670                                 struct symbol *cs;
 671                                 struct symbol *ds;
 672
 673                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
 674                                 ds = sym_choice_default(cs);
 675                                 if (!sym_is_optional(cs) && sym == ds) {
 676                                         if ((sym->type == S_BOOLEAN) &&
 677                                             sym_get_tristate_value(sym) == yes)
 678                                                 goto next_menu;
 679                                 }
 680                         }
 681                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 682                 }
 683 next_menu:
 684                 if (menu->list != NULL) {
 685                         menu = menu->list;
 686                 }
 687                 else if (menu->next != NULL) {
 688                         menu = menu->next;
 689                 } else {
 690                         while ((menu = menu->parent)) {
 691                                 if (menu->next != NULL) {
 692                                         menu = menu->next;
 693                                         break;
 694                                 }
 695                         }
 696                 }
 697         }
 698         fclose(out);
 699         return 0;
 700 }
 701
 702 int conf_write(const char *name)
 703 {
 704         FILE *out;
 705         struct symbol *sym;
 706         struct menu *menu;
 707         const char *basename;
 708         const char *str;
 709         char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
 710         char *env;
 711
 712         dirname[0] = 0;
 713         if (name && name[0]) {
 714                 struct stat st;
 715                 char *slash;
 716
 717                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 718                         strcpy(dirname, name);
 719                         strcat(dirname, "/");
 720                         basename = conf_get_configname();
 721                 } else if ((slash = strrchr(name, '/'))) {
 722                         int size = slash - name + 1;
 723                         memcpy(dirname, name, size);
 724                         dirname[size] = 0;
 725                         if (slash[1])
 726                                 basename = slash + 1;
 727                         else
 728                                 basename = conf_get_configname();
 729                 } else
 730                         basename = name;
 731         } else
 732                 basename = conf_get_configname();
 733
 734         sprintf(newname, "%s%s", dirname, basename);
 735         env = getenv("KCONFIG_OVERWRITECONFIG");
 736         if (!env || !*env) {
 737                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
 738                 out = fopen(tmpname, "w");
 739         } else {
 740                 *tmpname = 0;
 741                 out = fopen(newname, "w");
 742         }
 743         if (!out)
 744                 return 1;
 745
 746         conf_write_heading(out, &kconfig_printer_cb, NULL);
 747
 748         if (!conf_get_changed())
 749                 sym_clear_all_valid();
 750
 751         menu = rootmenu.list;
 752         while (menu) {
 753                 sym = menu->sym;
 754                 if (!sym) {
 755                         if (!menu_is_visible(menu))
 756                                 goto next;
 757                         str = menu_get_prompt(menu);
 758                         fprintf(out, "\n"
 759                                      "#\n"
 760                                      "# %s\n"
 761                                      "#\n", str);
 762                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 763                         sym_calc_value(sym);
 764                         if (!(sym->flags & SYMBOL_WRITE))
 765                                 goto next;
 766                         sym->flags &= ~SYMBOL_WRITE;
 767
 768                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 769                 }
 770
 771 next:
 772                 if (menu->list) {
 773                         menu = menu->list;
 774                         continue;
 775                 }
 776                 if (menu->next)
 777                         menu = menu->next;
 778                 else while ((menu = menu->parent)) {
 779                         if (menu->next) {
 780                                 menu = menu->next;
 781                                 break;
 782                         }
 783                 }
 784         }
 785         fclose(out);
 786
 787         if (*tmpname) {
 788                 strcat(dirname, basename);
 789                 strcat(dirname, ".old");
 790                 rename(newname, dirname);
 791                 if (rename(tmpname, newname))
 792                         return 1;
 793         }
 794
 795         conf_message(_("configuration written to %s"), newname);
 796
 797         sym_set_change_count(0);
 798
 799         return 0;
 800 }
 801
 802 static int conf_split_config(void)
 803 {
 804         const char *name;
 805         char path[PATH_MAX+1];
 806         char *s, *d, c;
 807         struct symbol *sym;
 808         struct stat sb;
 809         int res, i, fd;
 810
 811         name = conf_get_autoconfig_name();
 812         conf_read_simple(name, S_DEF_AUTO);
 813
 814         if (chdir("include/config"))
 815                 return 1;
 816
 817         res = 0;
 818         for_all_symbols(i, sym) {
 819                 sym_calc_value(sym);
 820                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 821                         continue;
 822                 if (sym->flags & SYMBOL_WRITE) {
 823                         if (sym->flags & SYMBOL_DEF_AUTO) {
 824                                 /*
 825                                  * symbol has old and new value,
 826                                  * so compare them...
 827                                  */
 828                                 switch (sym->type) {
 829                                 case S_BOOLEAN:
 830                                 case S_TRISTATE:
 831                                         if (sym_get_tristate_value(sym) ==
 832                                             sym->def[S_DEF_AUTO].tri)
 833                                                 continue;
 834                                         break;
 835                                 case S_STRING:
 836                                 case S_HEX:
 837                                 case S_INT:
 838                                         if (!strcmp(sym_get_string_value(sym),
 839                                                     sym->def[S_DEF_AUTO].val))
 840                                                 continue;
 841                                         break;
 842                                 default:
 843                                         break;
 844                                 }
 845                         } else {
 846                                 /*
 847                                  * If there is no old value, only 'no' (unset)
 848                                  * is allowed as new value.
 849                                  */
 850                                 switch (sym->type) {
 851                                 case S_BOOLEAN:
 852                                 case S_TRISTATE:
 853                                         if (sym_get_tristate_value(sym) == no)
 854                                                 continue;
 855                                         break;
 856                                 default:
 857                                         break;
 858                                 }
 859                         }
 860                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 861                         /* There is neither an old nor a new value. */
 862                         continue;
 863                 /* else
 864                  *      There is an old value, but no new value ('no' (unset)
 865                  *      isn't saved in auto.conf, so the old value is always
 866                  *      different from 'no').
 867                  */
 868
 869                 /* Replace all '_' and append ".h" */
 870                 s = sym->name;
 871                 d = path;
 872                 while ((c = *s++)) {
 873                         c = tolower(c);
 874                         *d++ = (c == '_') ? '/' : c;
 875                 }
 876                 strcpy(d, ".h");
 877
 878                 /* Assume directory path already exists. */
 879                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 880                 if (fd == -1) {
 881                         if (errno != ENOENT) {
 882                                 res = 1;
 883                                 break;
 884                         }
 885                         /*
 886                          * Create directory components,
 887                          * unless they exist already.
 888                          */
 889                         d = path;
 890                         while ((d = strchr(d, '/'))) {
 891                                 *d = 0;
 892                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 893                                         res = 1;
 894                                         goto out;
 895                                 }
 896                                 *d++ = '/';
 897                         }
 898                         /* Try it again. */
 899                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 900                         if (fd == -1) {
 901                                 res = 1;
 902                                 break;
 903                         }
 904                 }
 905                 close(fd);
 906         }
 907 out:
 908         if (chdir("../.."))
 909                 return 1;
 910
 911         return res;
 912 }
 913
 914 int conf_write_autoconf(void)
 915 {
 916         struct symbol *sym;
 917         const char *name;
 918         FILE *out, *tristate, *out_h;
 919         int i;
 920
 921         sym_clear_all_valid();
 922
 923         file_write_dep("include/config/auto.conf.cmd");
 924
 925         if (conf_split_config())
 926                 return 1;
 927
 928         out = fopen(".tmpconfig", "w");
 929         if (!out)
 930                 return 1;
 931
 932         tristate = fopen(".tmpconfig_tristate", "w");
 933         if (!tristate) {
 934                 fclose(out);
 935                 return 1;
 936         }
 937
 938         out_h = fopen(".tmpconfig.h", "w");
 939         if (!out_h) {
 940                 fclose(out);
 941                 fclose(tristate);
 942                 return 1;
 943         }
 944
 945         conf_write_heading(out, &kconfig_printer_cb, NULL);
 946
 947         conf_write_heading(tristate, &tristate_printer_cb, NULL);
 948
 949         conf_write_heading(out_h, &header_printer_cb, NULL);
 950
 951         for_all_symbols(i, sym) {
 952                 if (!sym->name)
 953                         continue;
 954
 955                 sym_calc_value(sym);
 956
 957                 conf_write_symbol(out_h, sym, &header__enabled_printer_cb, NULL);
 958
 959                 if (!(sym->flags & SYMBOL_WRITE))
 960                         continue;
 961
 962                 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
 963
 964                 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
 965
 966                 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
 967         }
 968         fclose(out);
 969         fclose(tristate);
 970         fclose(out_h);
 971
 972         name = getenv("KCONFIG_AUTOHEADER");
 973         if (!name)
 974                 name = "include/generated/autoconf.h";
 975         if (rename(".tmpconfig.h", name))
 976                 return 1;
 977         name = getenv("KCONFIG_TRISTATE");
 978         if (!name)
 979                 name = "include/config/tristate.conf";
 980         if (rename(".tmpconfig_tristate", name))
 981                 return 1;
 982         name = conf_get_autoconfig_name();
 983         /*
 984          * This must be the last step, kbuild has a dependency on auto.conf
 985          * and this marks the successful completion of the previous steps.
 986          */
 987         if (rename(".tmpconfig", name))
 988                 return 1;
 989
 990         return 0;
 991 }
 992
 993 static int sym_change_count;
 994 static void (*conf_changed_callback)(void);
 995
 996 void sym_set_change_count(int count)
 997 {
 998         int _sym_change_count = sym_change_count;
 999         sym_change_count = count;
1000         if (conf_changed_callback &&
1001             (bool)_sym_change_count != (bool)count)
1002                 conf_changed_callback();
1003 }
1004
1005 void sym_add_change_count(int count)
1006 {
1007         sym_set_change_count(count + sym_change_count);
1008 }
1009
1010 bool conf_get_changed(void)
1011 {
1012         return sym_change_count;
1013 }
1014
1015 void conf_set_changed_callback(void (*fn)(void))
1016 {
1017         conf_changed_callback = fn;
1018 }
1019
1020 static void randomize_choice_values(struct symbol *csym)
1021 {
1022         struct property *prop;
1023         struct symbol *sym;
1024         struct expr *e;
1025         int cnt, def;
1026
1027         /*
1028          * If choice is mod then we may have more items selected
1029          * and if no then no-one.
1030          * In both cases stop.
1031          */
1032         if (csym->curr.tri != yes)
1033                 return;
1034
1035         prop = sym_get_choice_prop(csym);
1036
1037         /* count entries in choice block */
1038         cnt = 0;
1039         expr_list_for_each_sym(prop->expr, e, sym)
1040                 cnt++;
1041
1042         /*
1043          * find a random value and set it to yes,
1044          * set the rest to no so we have only one set
1045          */
1046         def = (rand() % cnt);
1047
1048         cnt = 0;
1049         expr_list_for_each_sym(prop->expr, e, sym) {
1050                 if (def == cnt++) {
1051                         sym->def[S_DEF_USER].tri = yes;
1052                         csym->def[S_DEF_USER].val = sym;
1053                 }
1054                 else {
1055                         sym->def[S_DEF_USER].tri = no;
1056                 }
1057         }
1058         csym->flags |= SYMBOL_DEF_USER;
1059         /* clear VALID to get value calculated */
1060         csym->flags &= ~(SYMBOL_VALID);
1061 }
1062
1063 static void set_all_choice_values(struct symbol *csym)
1064 {
1065         struct property *prop;
1066         struct symbol *sym;
1067         struct expr *e;
1068
1069         prop = sym_get_choice_prop(csym);
1070
1071         /*
1072          * Set all non-assinged choice values to no
1073          */
1074         expr_list_for_each_sym(prop->expr, e, sym) {
1075                 if (!sym_has_value(sym))
1076                         sym->def[S_DEF_USER].tri = no;
1077         }
1078         csym->flags |= SYMBOL_DEF_USER;
1079         /* clear VALID to get value calculated */
1080         csym->flags &= ~(SYMBOL_VALID);
1081 }
1082
1083 void conf_set_all_new_symbols(enum conf_def_mode mode)
1084 {
1085         struct symbol *sym, *csym;
1086         int i, cnt;
1087
1088         for_all_symbols(i, sym) {
1089                 if (sym_has_value(sym))
1090                         continue;
1091                 switch (sym_get_type(sym)) {
1092                 case S_BOOLEAN:
1093                 case S_TRISTATE:
1094                         switch (mode) {
1095                         case def_yes:
1096                                 sym->def[S_DEF_USER].tri = yes;
1097                                 break;
1098                         case def_mod:
1099                                 sym->def[S_DEF_USER].tri = mod;
1100                                 break;
1101                         case def_no:
1102                                 sym->def[S_DEF_USER].tri = no;
1103                                 break;
1104                         case def_random:
1105                                 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1106                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1107                                 break;
1108                         default:
1109                                 continue;
1110                         }
1111                         if (!(sym_is_choice(sym) && mode == def_random))
1112                                 sym->flags |= SYMBOL_DEF_USER;
1113                         break;
1114                 default:
1115                         break;
1116                 }
1117
1118         }
1119
1120         sym_clear_all_valid();
1121
1122         /*
1123          * We have different type of choice blocks.
1124          * If curr.tri equals to mod then we can select several
1125          * choice symbols in one block.
1126          * In this case we do nothing.
1127          * If curr.tri equals yes then only one symbol can be
1128          * selected in a choice block and we set it to yes,
1129          * and the rest to no.
1130          */
1131         for_all_symbols(i, csym) {
1132                 if (sym_has_value(csym) || !sym_is_choice(csym))
1133                         continue;
1134
1135                 sym_calc_value(csym);
1136                 if (mode == def_random)
1137                         randomize_choice_values(csym);
1138                 else
1139                         set_all_choice_values(csym);
1140         }
1141 }