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                 /*
 539                  * Generate the __enabled_CONFIG_* and
 540                  * __enabled_CONFIG_*_MODULE macros for use by the
 541                  * IS_{ENABLED,BUILTIN,MODULE} macros. The _MODULE variant is
 542                  * generated even for booleans so that the IS_ENABLED() macro
 543                  * works.
 544                  */
 545                 fprintf(fp, "#define __enabled_" CONFIG_ "%s %d\n",
 546                                 sym->name, (*value == 'y'));
 547                 fprintf(fp, "#define __enabled_" CONFIG_ "%s_MODULE %d\n",
 548                                 sym->name, (*value == 'm'));
 549                 break;
 550         }
 551         case S_HEX: {
 552                 const char *prefix = "";
 553
 554                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
 555                         prefix = "0x";
 556                 fprintf(fp, "#define %s%s %s%s\n",
 557                     CONFIG_, sym->name, prefix, value);
 558                 break;
 559         }
 560         case S_STRING:
 561         case S_INT:
 562                 fprintf(fp, "#define %s%s %s\n",
 563                     CONFIG_, sym->name, value);
 564                 break;
 565         default:
 566                 break;
 567         }
 568
 569 }
 570
 571 static void
 572 header_print_comment(FILE *fp, const char *value, void *arg)
 573 {
 574         const char *p = value;
 575         size_t l;
 576
 577         fprintf(fp, "/*\n");
 578         for (;;) {
 579                 l = strcspn(p, "\n");
 580                 fprintf(fp, " *");
 581                 if (l) {
 582                         fprintf(fp, " ");
 583                         xfwrite(p, l, 1, fp);
 584                         p += l;
 585                 }
 586                 fprintf(fp, "\n");
 587                 if (*p++ == '\0')
 588                         break;
 589         }
 590         fprintf(fp, " */\n");
 591 }
 592
 593 static struct conf_printer header_printer_cb =
 594 {
 595         .print_symbol = header_print_symbol,
 596         .print_comment = header_print_comment,
 597 };
 598
 599 /*
 600  * Tristate printer
 601  *
 602  * This printer is used when generating the `include/generated/tristate.conf' file.
 603  */
 604 static void
 605 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 606 {
 607
 608         if (sym->type == S_TRISTATE && *value != 'n')
 609                 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
 610 }
 611
 612 static struct conf_printer tristate_printer_cb =
 613 {
 614         .print_symbol = tristate_print_symbol,
 615         .print_comment = kconfig_print_comment,
 616 };
 617
 618 static void conf_write_symbol(FILE *fp, struct symbol *sym,
 619                               struct conf_printer *printer, void *printer_arg)
 620 {
 621         const char *str;
 622
 623         switch (sym->type) {
 624         case S_OTHER:
 625         case S_UNKNOWN:
 626                 break;
 627         case S_STRING:
 628                 str = sym_get_string_value(sym);
 629                 str = sym_escape_string_value(str);
 630                 printer->print_symbol(fp, sym, str, printer_arg);
 631                 free((void *)str);
 632                 break;
 633         default:
 634                 str = sym_get_string_value(sym);
 635                 printer->print_symbol(fp, sym, str, printer_arg);
 636         }
 637 }
 638
 639 static void
 640 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
 641 {
 642         char buf[256];
 643
 644         snprintf(buf, sizeof(buf),
 645             "\n"
 646             "Automatically generated file; DO NOT EDIT.\n"
 647             "%s\n",
 648             rootmenu.prompt->text);
 649
 650         printer->print_comment(fp, buf, printer_arg);
 651 }
 652
 653 /*
 654  * Write out a minimal config.
 655  * All values that has default values are skipped as this is redundant.
 656  */
 657 int conf_write_defconfig(const char *filename)
 658 {
 659         struct symbol *sym;
 660         struct menu *menu;
 661         FILE *out;
 662
 663         out = fopen(filename, "w");
 664         if (!out)
 665                 return 1;
 666
 667         sym_clear_all_valid();
 668
 669         /* Traverse all menus to find all relevant symbols */
 670         menu = rootmenu.list;
 671
 672         while (menu != NULL)
 673         {
 674                 sym = menu->sym;
 675                 if (sym == NULL) {
 676                         if (!menu_is_visible(menu))
 677                                 goto next_menu;
 678                 } else if (!sym_is_choice(sym)) {
 679                         sym_calc_value(sym);
 680                         if (!(sym->flags & SYMBOL_WRITE))
 681                                 goto next_menu;
 682                         sym->flags &= ~SYMBOL_WRITE;
 683                         /* If we cannot change the symbol - skip */
 684                         if (!sym_is_changable(sym))
 685                                 goto next_menu;
 686                         /* If symbol equals to default value - skip */
 687                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
 688                                 goto next_menu;
 689
 690                         /*
 691                          * If symbol is a choice value and equals to the
 692                          * default for a choice - skip.
 693                          * But only if value is bool and equal to "y" and
 694                          * choice is not "optional".
 695                          * (If choice is "optional" then all values can be "n")
 696                          */
 697                         if (sym_is_choice_value(sym)) {
 698                                 struct symbol *cs;
 699                                 struct symbol *ds;
 700
 701                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
 702                                 ds = sym_choice_default(cs);
 703                                 if (!sym_is_optional(cs) && sym == ds) {
 704                                         if ((sym->type == S_BOOLEAN) &&
 705                                             sym_get_tristate_value(sym) == yes)
 706                                                 goto next_menu;
 707                                 }
 708                         }
 709                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 710                 }
 711 next_menu:
 712                 if (menu->list != NULL) {
 713                         menu = menu->list;
 714                 }
 715                 else if (menu->next != NULL) {
 716                         menu = menu->next;
 717                 } else {
 718                         while ((menu = menu->parent)) {
 719                                 if (menu->next != NULL) {
 720                                         menu = menu->next;
 721                                         break;
 722                                 }
 723                         }
 724                 }
 725         }
 726         fclose(out);
 727         return 0;
 728 }
 729
 730 int conf_write(const char *name)
 731 {
 732         FILE *out;
 733         struct symbol *sym;
 734         struct menu *menu;
 735         const char *basename;
 736         const char *str;
 737         char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
 738         char *env;
 739
 740         dirname[0] = 0;
 741         if (name && name[0]) {
 742                 struct stat st;
 743                 char *slash;
 744
 745                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 746                         strcpy(dirname, name);
 747                         strcat(dirname, "/");
 748                         basename = conf_get_configname();
 749                 } else if ((slash = strrchr(name, '/'))) {
 750                         int size = slash - name + 1;
 751                         memcpy(dirname, name, size);
 752                         dirname[size] = 0;
 753                         if (slash[1])
 754                                 basename = slash + 1;
 755                         else
 756                                 basename = conf_get_configname();
 757                 } else
 758                         basename = name;
 759         } else
 760                 basename = conf_get_configname();
 761
 762         sprintf(newname, "%s%s", dirname, basename);
 763         env = getenv("KCONFIG_OVERWRITECONFIG");
 764         if (!env || !*env) {
 765                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
 766                 out = fopen(tmpname, "w");
 767         } else {
 768                 *tmpname = 0;
 769                 out = fopen(newname, "w");
 770         }
 771         if (!out)
 772                 return 1;
 773
 774         conf_write_heading(out, &kconfig_printer_cb, NULL);
 775
 776         if (!conf_get_changed())
 777                 sym_clear_all_valid();
 778
 779         menu = rootmenu.list;
 780         while (menu) {
 781                 sym = menu->sym;
 782                 if (!sym) {
 783                         if (!menu_is_visible(menu))
 784                                 goto next;
 785                         str = menu_get_prompt(menu);
 786                         fprintf(out, "\n"
 787                                      "#\n"
 788                                      "# %s\n"
 789                                      "#\n", str);
 790                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 791                         sym_calc_value(sym);
 792                         if (!(sym->flags & SYMBOL_WRITE))
 793                                 goto next;
 794                         sym->flags &= ~SYMBOL_WRITE;
 795
 796                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 797                 }
 798
 799 next:
 800                 if (menu->list) {
 801                         menu = menu->list;
 802                         continue;
 803                 }
 804                 if (menu->next)
 805                         menu = menu->next;
 806                 else while ((menu = menu->parent)) {
 807                         if (menu->next) {
 808                                 menu = menu->next;
 809                                 break;
 810                         }
 811                 }
 812         }
 813         fclose(out);
 814
 815         if (*tmpname) {
 816                 strcat(dirname, basename);
 817                 strcat(dirname, ".old");
 818                 rename(newname, dirname);
 819                 if (rename(tmpname, newname))
 820                         return 1;
 821         }
 822
 823         conf_message(_("configuration written to %s"), newname);
 824
 825         sym_set_change_count(0);
 826
 827         return 0;
 828 }
 829
 830 static int conf_split_config(void)
 831 {
 832         const char *name;
 833         char path[PATH_MAX+1];
 834         char *s, *d, c;
 835         struct symbol *sym;
 836         struct stat sb;
 837         int res, i, fd;
 838
 839         name = conf_get_autoconfig_name();
 840         conf_read_simple(name, S_DEF_AUTO);
 841
 842         if (chdir("include/generated"))
 843                 return 1;
 844
 845         res = 0;
 846         for_all_symbols(i, sym) {
 847                 sym_calc_value(sym);
 848                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 849                         continue;
 850                 if (sym->flags & SYMBOL_WRITE) {
 851                         if (sym->flags & SYMBOL_DEF_AUTO) {
 852                                 /*
 853                                  * symbol has old and new value,
 854                                  * so compare them...
 855                                  */
 856                                 switch (sym->type) {
 857                                 case S_BOOLEAN:
 858                                 case S_TRISTATE:
 859                                         if (sym_get_tristate_value(sym) ==
 860                                             sym->def[S_DEF_AUTO].tri)
 861                                                 continue;
 862                                         break;
 863                                 case S_STRING:
 864                                 case S_HEX:
 865                                 case S_INT:
 866                                         if (!strcmp(sym_get_string_value(sym),
 867                                                     sym->def[S_DEF_AUTO].val))
 868                                                 continue;
 869                                         break;
 870                                 default:
 871                                         break;
 872                                 }
 873                         } else {
 874                                 /*
 875                                  * If there is no old value, only 'no' (unset)
 876                                  * is allowed as new value.
 877                                  */
 878                                 switch (sym->type) {
 879                                 case S_BOOLEAN:
 880                                 case S_TRISTATE:
 881                                         if (sym_get_tristate_value(sym) == no)
 882                                                 continue;
 883                                         break;
 884                                 default:
 885                                         break;
 886                                 }
 887                         }
 888                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 889                         /* There is neither an old nor a new value. */
 890                         continue;
 891                 /* else
 892                  *      There is an old value, but no new value ('no' (unset)
 893                  *      isn't saved in auto.conf, so the old value is always
 894                  *      different from 'no').
 895                  */
 896
 897                 /* Replace all '_' and append ".h" */
 898                 s = sym->name;
 899                 d = path;
 900                 while ((c = *s++)) {
 901                         c = tolower(c);
 902                         *d++ = (c == '_') ? '/' : c;
 903                 }
 904                 strcpy(d, ".h");
 905
 906                 /* Assume directory path already exists. */
 907                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 908                 if (fd == -1) {
 909                         if (errno != ENOENT) {
 910                                 res = 1;
 911                                 break;
 912                         }
 913                         /*
 914                          * Create directory components,
 915                          * unless they exist already.
 916                          */
 917                         d = path;
 918                         while ((d = strchr(d, '/'))) {
 919                                 *d = 0;
 920                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 921                                         res = 1;
 922                                         goto out;
 923                                 }
 924                                 *d++ = '/';
 925                         }
 926                         /* Try it again. */
 927                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 928                         if (fd == -1) {
 929                                 res = 1;
 930                                 break;
 931                         }
 932                 }
 933                 close(fd);
 934         }
 935 out:
 936         if (chdir("../.."))
 937                 return 1;
 938
 939         return res;
 940 }
 941
 942 int conf_write_autoconf(void)
 943 {
 944         struct symbol *sym;
 945         const char *name;
 946         FILE *out, *tristate, *out_h, *out_c;
 947         int i;
 948
 949         sym_clear_all_valid();
 950
 951         file_write_dep("include/generated/auto.conf.cmd");
 952
 953         if (conf_split_config())
 954                 return 1;
 955
 956         out = fopen(".tmpconfig", "w");
 957         if (!out)
 958                 return 1;
 959
 960         tristate = fopen(".tmpconfig_tristate", "w");
 961         if (!tristate) {
 962                 fclose(out);
 963                 return 1;
 964         }
 965
 966         out_h = fopen(".tmpconfig.h", "w");
 967         if (!out_h) {
 968                 fclose(out);
 969                 fclose(tristate);
 970                 return 1;
 971         }
 972
 973         out_c = fopen(".tmpconfig.cmake", "w");
 974         if (!out_c) {
 975                 fclose(out);
 976                 fclose(tristate);
 977                 fclose(out_h);
 978         }
 979
 980         conf_write_heading(out, &kconfig_printer_cb, NULL);
 981
 982         conf_write_heading(tristate, &tristate_printer_cb, NULL);
 983
 984         conf_write_heading(out_h, &header_printer_cb, NULL);
 985
 986         conf_write_heading(out_c, &kconfig_printer_cmake_cb, NULL);
 987
 988         for_all_symbols(i, sym) {
 989                 sym_calc_value(sym);
 990                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 991                         continue;
 992
 993                 /* write symbol to auto.conf, tristate and header files */
 994                 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
 995
 996                 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
 997
 998                 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
 999
1000                 conf_write_symbol(out_c, sym, &kconfig_printer_cmake_cb, NULL);
1001         }
1002         fclose(out);
1003         fclose(tristate);
1004         fclose(out_h);
1005         fclose(out_c);
1006
1007         name = getenv("KCONFIG_AUTOHEADER");
1008         if (!name)
1009                 name = "include/generated/autoconf.h";
1010         if (rename(".tmpconfig.h", name))
1011                 return 1;
1012         name = getenv("KCONFIG_TRISTATE");
1013         if (!name)
1014                 name = "include/generated/tristate.conf";
1015         if (rename(".tmpconfig_tristate", name))
1016                 return 1;
1017         name = getenv("KCONFIG_CMAKE");
1018         if (!name)
1019                 name = "config.cmake";
1020         if (rename(".tmpconfig.cmake", name))
1021                 return 1;
1022         name = conf_get_autoconfig_name();
1023         /*
1024          * This must be the last step, kbuild has a dependency on auto.conf
1025          * and this marks the successful completion of the previous steps.
1026          */
1027         if (rename(".tmpconfig", name))
1028                 return 1;
1029
1030         return 0;
1031 }
1032
1033 static int sym_change_count;
1034 static void (*conf_changed_callback)(void);
1035
1036 void sym_set_change_count(int count)
1037 {
1038         int _sym_change_count = sym_change_count;
1039         sym_change_count = count;
1040         if (conf_changed_callback &&
1041             (bool)_sym_change_count != (bool)count)
1042                 conf_changed_callback();
1043 }
1044
1045 void sym_add_change_count(int count)
1046 {
1047         sym_set_change_count(count + sym_change_count);
1048 }
1049
1050 bool conf_get_changed(void)
1051 {
1052         return sym_change_count;
1053 }
1054
1055 void conf_set_changed_callback(void (*fn)(void))
1056 {
1057         conf_changed_callback = fn;
1058 }
1059
1060 static void randomize_choice_values(struct symbol *csym)
1061 {
1062         struct property *prop;
1063         struct symbol *sym;
1064         struct expr *e;
1065         int cnt, def;
1066
1067         /*
1068          * If choice is mod then we may have more items selected
1069          * and if no then no-one.
1070          * In both cases stop.
1071          */
1072         if (csym->curr.tri != yes)
1073                 return;
1074
1075         prop = sym_get_choice_prop(csym);
1076
1077         /* count entries in choice block */
1078         cnt = 0;
1079         expr_list_for_each_sym(prop->expr, e, sym)
1080                 cnt++;
1081
1082         /*
1083          * find a random value and set it to yes,
1084          * set the rest to no so we have only one set
1085          */
1086         def = (rand() % cnt);
1087
1088         cnt = 0;
1089         expr_list_for_each_sym(prop->expr, e, sym) {
1090                 if (def == cnt++) {
1091                         sym->def[S_DEF_USER].tri = yes;
1092                         csym->def[S_DEF_USER].val = sym;
1093                 }
1094                 else {
1095                         sym->def[S_DEF_USER].tri = no;
1096                 }
1097         }
1098         csym->flags |= SYMBOL_DEF_USER;
1099         /* clear VALID to get value calculated */
1100         csym->flags &= ~(SYMBOL_VALID);
1101 }
1102
1103 static void set_all_choice_values(struct symbol *csym)
1104 {
1105         struct property *prop;
1106         struct symbol *sym;
1107         struct expr *e;
1108
1109         prop = sym_get_choice_prop(csym);
1110
1111         /*
1112          * Set all non-assinged choice values to no
1113          */
1114         expr_list_for_each_sym(prop->expr, e, sym) {
1115                 if (!sym_has_value(sym))
1116                         sym->def[S_DEF_USER].tri = no;
1117         }
1118         csym->flags |= SYMBOL_DEF_USER;
1119         /* clear VALID to get value calculated */
1120         csym->flags &= ~(SYMBOL_VALID);
1121 }
1122
1123 void conf_set_all_new_symbols(enum conf_def_mode mode)
1124 {
1125         struct symbol *sym, *csym;
1126         int i, cnt;
1127
1128         for_all_symbols(i, sym) {
1129                 if (sym_has_value(sym))
1130                         continue;
1131                 switch (sym_get_type(sym)) {
1132                 case S_BOOLEAN:
1133                 case S_TRISTATE:
1134                         switch (mode) {
1135                         case def_yes:
1136                                 sym->def[S_DEF_USER].tri = yes;
1137                                 break;
1138                         case def_mod:
1139                                 sym->def[S_DEF_USER].tri = mod;
1140                                 break;
1141                         case def_no:
1142                                 sym->def[S_DEF_USER].tri = no;
1143                                 break;
1144                         case def_random:
1145                                 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1146                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1147                                 break;
1148                         default:
1149                                 continue;
1150                         }
1151                         if (!(sym_is_choice(sym) && mode == def_random))
1152                                 sym->flags |= SYMBOL_DEF_USER;
1153                         break;
1154                 default:
1155                         break;
1156                 }
1157
1158         }
1159
1160         sym_clear_all_valid();
1161
1162         /*
1163          * We have different type of choice blocks.
1164          * If curr.tri equals to mod then we can select several
1165          * choice symbols in one block.
1166          * In this case we do nothing.
1167          * If curr.tri equals yes then only one symbol can be
1168          * selected in a choice block and we set it to yes,
1169          * and the rest to no.
1170          */
1171         for_all_symbols(i, csym) {
1172                 if (sym_has_value(csym) || !sym_is_choice(csym))
1173                         continue;
1174
1175                 sym_calc_value(csym);
1176                 if (mode == def_random)
1177                         randomize_choice_values(csym);
1178                 else
1179                         set_all_choice_values(csym);
1180         }
1181 }