scripts/kconfig/confdata.c

   1 /*
   2  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
   3  * Released under the terms of the GNU GPL v2.0.
   4  */
   5
   6 #include <sys/stat.h>
   7 #include <ctype.h>
   8 #include <errno.h>
   9 #include <fcntl.h>
  10 #include <stdarg.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <time.h>
  15 #include <unistd.h>
  16
  17 #include "lkc.h"
  18
  19 static void conf_warning(const char *fmt, ...)
  20         __attribute__ ((format (printf, 1, 2)));
  21
  22 static void conf_message(const char *fmt, ...)
  23         __attribute__ ((format (printf, 1, 2)));
  24
  25 static const char *conf_filename;
  26 static int conf_lineno, conf_warnings, conf_unsaved;
  27
  28 const char conf_defname[] = "arch/$ARCH/defconfig";
  29
  30 static void conf_warning(const char *fmt, ...)
  31 {
  32         va_list ap;
  33         va_start(ap, fmt);
  34         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  35         vfprintf(stderr, fmt, ap);
  36         fprintf(stderr, "\n");
  37         va_end(ap);
  38         conf_warnings++;
  39 }
  40
  41 static void conf_default_message_callback(const char *fmt, va_list ap)
  42 {
  43         printf("#\n# ");
  44         vprintf(fmt, ap);
  45         printf("\n#\n");
  46 }
  47
  48 static void (*conf_message_callback) (const char *fmt, va_list ap) =
  49         conf_default_message_callback;
  50 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
  51 {
  52         conf_message_callback = fn;
  53 }
  54
  55 static void conf_message(const char *fmt, ...)
  56 {
  57         va_list ap;
  58
  59         va_start(ap, fmt);
  60         if (conf_message_callback)
  61                 conf_message_callback(fmt, ap);
  62 }
  63
  64 const char *conf_get_configname(void)
  65 {
  66         char *name = getenv("KCONFIG_CONFIG");
  67
  68         return name ? name : ".config";
  69 }
  70
  71 const char *conf_get_autoconfig_name(void)
  72 {
  73         char *name = getenv("KCONFIG_AUTOCONFIG");
  74
  75         return name ? name : "include/config/auto.conf";
  76 }
  77
  78 static char *conf_expand_value(const char *in)
  79 {
  80         struct symbol *sym;
  81         const char *src;
  82         static char res_value[SYMBOL_MAXLENGTH];
  83         char *dst, name[SYMBOL_MAXLENGTH];
  84
  85         res_value[0] = 0;
  86         dst = name;
  87         while ((src = strchr(in, '$'))) {
  88                 strncat(res_value, in, src - in);
  89                 src++;
  90                 dst = name;
  91                 while (isalnum(*src) || *src == '_')
  92                         *dst++ = *src++;
  93                 *dst = 0;
  94                 sym = sym_lookup(name, 0);
  95                 sym_calc_value(sym);
  96                 strcat(res_value, sym_get_string_value(sym));
  97                 in = src;
  98         }
  99         strcat(res_value, in);
 100
 101         return res_value;
 102 }
 103
 104 char *conf_get_default_confname(void)
 105 {
 106         struct stat buf;
 107         static char fullname[PATH_MAX+1];
 108         char *env, *name;
 109
 110         name = conf_expand_value(conf_defname);
 111         env = getenv(SRCTREE);
 112         if (env) {
 113                 sprintf(fullname, "%s/%s", env, name);
 114                 if (!stat(fullname, &buf))
 115                         return fullname;
 116         }
 117         return name;
 118 }
 119
 120 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
 121 {
 122         char *p2;
 123
 124         switch (sym->type) {
 125         case S_TRISTATE:
 126                 if (p[0] == 'm') {
 127                         sym->def[def].tri = mod;
 128                         sym->flags |= def_flags;
 129                         break;
 130                 }
 131                 /* fall through */
 132         case S_BOOLEAN:
 133                 if (p[0] == 'y') {
 134                         sym->def[def].tri = yes;
 135                         sym->flags |= def_flags;
 136                         break;
 137                 }
 138                 if (p[0] == 'n') {
 139                         sym->def[def].tri = no;
 140                         sym->flags |= def_flags;
 141                         break;
 142                 }
 143                 if (def != S_DEF_AUTO)
 144                         conf_warning("symbol value '%s' invalid for %s",
 145                                      p, sym->name);
 146                 return 1;
 147         case S_OTHER:
 148                 if (*p != '"') {
 149                         for (p2 = p; *p2 && !isspace(*p2); p2++)
 150                                 ;
 151                         sym->type = S_STRING;
 152                         goto done;
 153                 }
 154                 /* fall through */
 155         case S_STRING:
 156                 if (*p++ != '"')
 157                         break;
 158                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 159                         if (*p2 == '"') {
 160                                 *p2 = 0;
 161                                 break;
 162                         }
 163                         memmove(p2, p2 + 1, strlen(p2));
 164                 }
 165                 if (!p2) {
 166                         if (def != S_DEF_AUTO)
 167                                 conf_warning("invalid string found");
 168                         return 1;
 169                 }
 170                 /* fall through */
 171         case S_INT:
 172         case S_HEX:
 173         done:
 174                 if (sym_string_valid(sym, p)) {
 175                         sym->def[def].val = strdup(p);
 176                         sym->flags |= def_flags;
 177                 } else {
 178                         if (def != S_DEF_AUTO)
 179                                 conf_warning("symbol value '%s' invalid for %s",
 180                                              p, sym->name);
 181                         return 1;
 182                 }
 183                 break;
 184         default:
 185                 ;
 186         }
 187         return 0;
 188 }
 189
 190 #define LINE_GROWTH 16
 191 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
 192 {
 193         char *nline;
 194         size_t new_size = slen + 1;
 195         if (new_size > *n) {
 196                 new_size += LINE_GROWTH - 1;
 197                 new_size *= 2;
 198                 nline = realloc(*lineptr, new_size);
 199                 if (!nline)
 200                         return -1;
 201
 202                 *lineptr = nline;
 203                 *n = new_size;
 204         }
 205
 206         (*lineptr)[slen] = c;
 207
 208         return 0;
 209 }
 210
 211 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
 212 {
 213         char *line = *lineptr;
 214         size_t slen = 0;
 215
 216         for (;;) {
 217                 int c = getc(stream);
 218
 219                 switch (c) {
 220                 case '\n':
 221                         if (add_byte(c, &line, slen, n) < 0)
 222                                 goto e_out;
 223                         slen++;
 224                         /* fall through */
 225                 case EOF:
 226                         if (add_byte('\0', &line, slen, n) < 0)
 227                                 goto e_out;
 228                         *lineptr = line;
 229                         if (slen == 0)
 230                                 return -1;
 231                         return slen;
 232                 default:
 233                         if (add_byte(c, &line, slen, n) < 0)
 234                                 goto e_out;
 235                         slen++;
 236                 }
 237         }
 238
 239 e_out:
 240         line[slen-1] = '\0';
 241         *lineptr = line;
 242         return -1;
 243 }
 244
 245 int conf_read_simple(const char *name, int def)
 246 {
 247         FILE *in = NULL;
 248         char   *line = NULL;
 249         size_t  line_asize = 0;
 250         char *p, *p2;
 251         struct symbol *sym;
 252         int i, def_flags;
 253
 254         if (name) {
 255                 in = zconf_fopen(name);
 256         } else {
 257                 struct property *prop;
 258
 259                 name = conf_get_configname();
 260                 in = zconf_fopen(name);
 261                 if (in)
 262                         goto load;
 263                 sym_add_change_count(1);
 264                 if (!sym_defconfig_list) {
 265                         if (modules_sym)
 266                                 sym_calc_value(modules_sym);
 267                         return 1;
 268                 }
 269
 270                 for_all_defaults(sym_defconfig_list, prop) {
 271                         if (expr_calc_value(prop->visible.expr) == no ||
 272                             prop->expr->type != E_SYMBOL)
 273                                 continue;
 274                         name = conf_expand_value(prop->expr->left.sym->name);
 275                         in = zconf_fopen(name);
 276                         if (in) {
 277                                 conf_message(_("using defaults found in %s"),
 278                                          name);
 279                                 goto load;
 280                         }
 281                 }
 282         }
 283         if (!in)
 284                 return 1;
 285
 286 load:
 287         conf_filename = name;
 288         conf_lineno = 0;
 289         conf_warnings = 0;
 290         conf_unsaved = 0;
 291
 292         def_flags = SYMBOL_DEF << def;
 293         for_all_symbols(i, sym) {
 294                 sym->flags |= SYMBOL_CHANGED;
 295                 sym->flags &= ~(def_flags|SYMBOL_VALID);
 296                 if (sym_is_choice(sym))
 297                         sym->flags |= def_flags;
 298                 switch (sym->type) {
 299                 case S_INT:
 300                 case S_HEX:
 301                 case S_STRING:
 302                         if (sym->def[def].val)
 303                                 free(sym->def[def].val);
 304                         /* fall through */
 305                 default:
 306                         sym->def[def].val = NULL;
 307                         sym->def[def].tri = no;
 308                 }
 309         }
 310
 311         while (compat_getline(&line, &line_asize, in) != -1) {
 312                 conf_lineno++;
 313                 sym = NULL;
 314                 if (line[0] == '#') {
 315                         if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
 316                                 continue;
 317                         p = strchr(line + 2 + strlen(CONFIG_), ' ');
 318                         if (!p)
 319                                 continue;
 320                         *p++ = 0;
 321                         if (strncmp(p, "is not set", 10))
 322                                 continue;
 323                         if (def == S_DEF_USER) {
 324                                 sym = sym_find(line + 2 + strlen(CONFIG_));
 325                                 if (!sym) {
 326                                         sym_add_change_count(1);
 327                                         goto setsym;
 328                                 }
 329                         } else {
 330                                 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
 331                                 if (sym->type == S_UNKNOWN)
 332                                         sym->type = S_BOOLEAN;
 333                         }
 334                         if (sym->flags & def_flags) {
 335                                 conf_warning("override: reassigning to symbol %s", sym->name);
 336                         }
 337                         switch (sym->type) {
 338                         case S_BOOLEAN:
 339                         case S_TRISTATE:
 340                                 sym->def[def].tri = no;
 341                                 sym->flags |= def_flags;
 342                                 break;
 343                         default:
 344                                 ;
 345                         }
 346                 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
 347                         p = strchr(line + strlen(CONFIG_), '=');
 348                         if (!p)
 349                                 continue;
 350                         *p++ = 0;
 351                         p2 = strchr(p, '\n');
 352                         if (p2) {
 353                                 *p2-- = 0;
 354                                 if (*p2 == '\r')
 355                                         *p2 = 0;
 356                         }
 357                         if (def == S_DEF_USER) {
 358                                 sym = sym_find(line + strlen(CONFIG_));
 359                                 if (!sym) {
 360                                         sym_add_change_count(1);
 361                                         goto setsym;
 362                                 }
 363                         } else {
 364                                 sym = sym_lookup(line + strlen(CONFIG_), 0);
 365                                 if (sym->type == S_UNKNOWN)
 366                                         sym->type = S_OTHER;
 367                         }
 368                         if (sym->flags & def_flags) {
 369                                 conf_warning("override: reassigning to symbol %s", sym->name);
 370                         }
 371                         if (conf_set_sym_val(sym, def, def_flags, p))
 372                                 continue;
 373                 } else {
 374                         if (line[0] != '\r' && line[0] != '\n')
 375                                 conf_warning("unexpected data");
 376                         continue;
 377                 }
 378 setsym:
 379                 if (sym && sym_is_choice_value(sym)) {
 380                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 381                         switch (sym->def[def].tri) {
 382                         case no:
 383                                 break;
 384                         case mod:
 385                                 if (cs->def[def].tri == yes) {
 386                                         conf_warning("%s creates inconsistent choice state", sym->name);
 387                                         cs->flags &= ~def_flags;
 388                                 }
 389                                 break;
 390                         case yes:
 391                                 if (cs->def[def].tri != no)
 392                                         conf_warning("override: %s changes choice state", sym->name);
 393                                 cs->def[def].val = sym;
 394                                 break;
 395                         }
 396                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
 397                 }
 398         }
 399         free(line);
 400         fclose(in);
 401
 402         if (modules_sym)
 403                 sym_calc_value(modules_sym);
 404         return 0;
 405 }
 406
 407 int conf_read(const char *name)
 408 {
 409         struct symbol *sym;
 410         int i;
 411
 412         sym_set_change_count(0);
 413
 414         if (conf_read_simple(name, S_DEF_USER))
 415                 return 1;
 416
 417         for_all_symbols(i, sym) {
 418                 sym_calc_value(sym);
 419                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 420                         continue;
 421                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 422                         /* check that calculated value agrees with saved value */
 423                         switch (sym->type) {
 424                         case S_BOOLEAN:
 425                         case S_TRISTATE:
 426                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
 427                                         break;
 428                                 if (!sym_is_choice(sym))
 429                                         continue;
 430                                 /* fall through */
 431                         default:
 432                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
 433                                         continue;
 434                                 break;
 435                         }
 436                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 437                         /* no previous value and not saved */
 438                         continue;
 439                 conf_unsaved++;
 440                 /* maybe print value in verbose mode... */
 441         }
 442
 443         for_all_symbols(i, sym) {
 444                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 445                         /* Reset values of generates values, so they'll appear
 446                          * as new, if they should become visible, but that
 447                          * doesn't quite work if the Kconfig and the saved
 448                          * configuration disagree.
 449                          */
 450                         if (sym->visible == no && !conf_unsaved)
 451                                 sym->flags &= ~SYMBOL_DEF_USER;
 452                         switch (sym->type) {
 453                         case S_STRING:
 454                         case S_INT:
 455                         case S_HEX:
 456                                 /* Reset a string value if it's out of range */
 457                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
 458                                         break;
 459                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
 460                                 conf_unsaved++;
 461                                 break;
 462                         default:
 463                                 break;
 464                         }
 465                 }
 466         }
 467
 468         sym_add_change_count(conf_warnings || conf_unsaved);
 469
 470         return 0;
 471 }
 472
 473 /*
 474  * Kconfig configuration printer
 475  *
 476  * This printer is used when generating the resulting configuration after
 477  * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
 478  * passing a non-NULL argument to the printer.
 479  *
 480  */
 481 static void
 482 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 483 {
 484
 485         switch (sym->type) {
 486         case S_BOOLEAN:
 487         case S_TRISTATE:
 488                 if (*value == 'n') {
 489                         bool skip_unset = (arg != NULL);
 490
 491                         if (!skip_unset)
 492                                 fprintf(fp, "# %s%s is not set\n",
 493                                     CONFIG_, sym->name);
 494                         return;
 495                 }
 496                 break;
 497         default:
 498                 break;
 499         }
 500
 501         fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
 502 }
 503
 504 static void
 505 kconfig_print_comment(FILE *fp, const char *value, void *arg)
 506 {
 507         const char *p = value;
 508         size_t l;
 509
 510         for (;;) {
 511                 l = strcspn(p, "\n");
 512                 fprintf(fp, "#");
 513                 if (l) {
 514                         fprintf(fp, " ");
 515                         xfwrite(p, l, 1, fp);
 516                         p += l;
 517                 }
 518                 fprintf(fp, "\n");
 519                 if (*p++ == '\0')
 520                         break;
 521         }
 522 }
 523
 524 static struct conf_printer kconfig_printer_cb =
 525 {
 526         .print_symbol = kconfig_print_symbol,
 527         .print_comment = kconfig_print_comment,
 528 };
 529
 530 /*
 531  * Header printer
 532  *
 533  * This printer is used when generating the `include/generated/autoconf.h' file.
 534  */
 535 static void
 536 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 537 {
 538
 539         switch (sym->type) {
 540         case S_BOOLEAN:
 541         case S_TRISTATE: {
 542                 const char *suffix = "";
 543
 544                 switch (*value) {
 545                 case 'n':
 546                         break;
 547                 case 'm':
 548                         suffix = "_MODULE";
 549                         /* fall through */
 550                 default:
 551                         fprintf(fp, "#define %s%s%s 1\n",
 552                             CONFIG_, sym->name, suffix);
 553                 }
 554                 break;
 555         }
 556         case S_HEX: {
 557                 const char *prefix = "";
 558
 559                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
 560                         prefix = "0x";
 561                 fprintf(fp, "#define %s%s %s%s\n",
 562                     CONFIG_, sym->name, prefix, value);
 563                 break;
 564         }
 565         case S_STRING:
 566         case S_INT:
 567                 fprintf(fp, "#define %s%s %s\n",
 568                     CONFIG_, sym->name, value);
 569                 break;
 570         default:
 571                 break;
 572         }
 573
 574 }
 575
 576 static void
 577 header_print_comment(FILE *fp, const char *value, void *arg)
 578 {
 579         const char *p = value;
 580         size_t l;
 581
 582         fprintf(fp, "/*\n");
 583         for (;;) {
 584                 l = strcspn(p, "\n");
 585                 fprintf(fp, " *");
 586                 if (l) {
 587                         fprintf(fp, " ");
 588                         xfwrite(p, l, 1, fp);
 589                         p += l;
 590                 }
 591                 fprintf(fp, "\n");
 592                 if (*p++ == '\0')
 593                         break;
 594         }
 595         fprintf(fp, " */\n");
 596 }
 597
 598 static struct conf_printer header_printer_cb =
 599 {
 600         .print_symbol = header_print_symbol,
 601         .print_comment = header_print_comment,
 602 };
 603
 604 /*
 605  * Tristate printer
 606  *
 607  * This printer is used when generating the `include/config/tristate.conf' file.
 608  */
 609 static void
 610 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 611 {
 612
 613         if (sym->type == S_TRISTATE && *value != 'n')
 614                 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
 615 }
 616
 617 static struct conf_printer tristate_printer_cb =
 618 {
 619         .print_symbol = tristate_print_symbol,
 620         .print_comment = kconfig_print_comment,
 621 };
 622
 623 static void conf_write_symbol(FILE *fp, struct symbol *sym,
 624                               struct conf_printer *printer, void *printer_arg)
 625 {
 626         const char *str;
 627
 628         switch (sym->type) {
 629         case S_OTHER:
 630         case S_UNKNOWN:
 631                 break;
 632         case S_STRING:
 633                 str = sym_get_string_value(sym);
 634                 str = sym_escape_string_value(str);
 635                 printer->print_symbol(fp, sym, str, printer_arg);
 636                 free((void *)str);
 637                 break;
 638         default:
 639                 str = sym_get_string_value(sym);
 640                 printer->print_symbol(fp, sym, str, printer_arg);
 641         }
 642 }
 643
 644 static void
 645 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
 646 {
 647         char buf[256];
 648
 649         snprintf(buf, sizeof(buf),
 650             "\n"
 651             "Automatically generated file; DO NOT EDIT.\n"
 652             "%s\n",
 653             rootmenu.prompt->text);
 654
 655         printer->print_comment(fp, buf, printer_arg);
 656 }
 657
 658 /*
 659  * Write out a minimal config.
 660  * All values that has default values are skipped as this is redundant.
 661  */
 662 int conf_write_defconfig(const char *filename)
 663 {
 664         struct symbol *sym;
 665         struct menu *menu;
 666         FILE *out;
 667
 668         out = fopen(filename, "w");
 669         if (!out)
 670                 return 1;
 671
 672         sym_clear_all_valid();
 673
 674         /* Traverse all menus to find all relevant symbols */
 675         menu = rootmenu.list;
 676
 677         while (menu != NULL)
 678         {
 679                 sym = menu->sym;
 680                 if (sym == NULL) {
 681                         if (!menu_is_visible(menu))
 682                                 goto next_menu;
 683                 } else if (!sym_is_choice(sym)) {
 684                         sym_calc_value(sym);
 685                         if (!(sym->flags & SYMBOL_WRITE))
 686                                 goto next_menu;
 687                         sym->flags &= ~SYMBOL_WRITE;
 688                         /* If we cannot change the symbol - skip */
 689                         if (!sym_is_changable(sym))
 690                                 goto next_menu;
 691                         /* If symbol equals to default value - skip */
 692                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
 693                                 goto next_menu;
 694
 695                         /*
 696                          * If symbol is a choice value and equals to the
 697                          * default for a choice - skip.
 698                          * But only if value is bool and equal to "y" and
 699                          * choice is not "optional".
 700                          * (If choice is "optional" then all values can be "n")
 701                          */
 702                         if (sym_is_choice_value(sym)) {
 703                                 struct symbol *cs;
 704                                 struct symbol *ds;
 705
 706                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
 707                                 ds = sym_choice_default(cs);
 708                                 if (!sym_is_optional(cs) && sym == ds) {
 709                                         if ((sym->type == S_BOOLEAN) &&
 710                                             sym_get_tristate_value(sym) == yes)
 711                                                 goto next_menu;
 712                                 }
 713                         }
 714                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 715                 }
 716 next_menu:
 717                 if (menu->list != NULL) {
 718                         menu = menu->list;
 719                 }
 720                 else if (menu->next != NULL) {
 721                         menu = menu->next;
 722                 } else {
 723                         while ((menu = menu->parent)) {
 724                                 if (menu->next != NULL) {
 725                                         menu = menu->next;
 726                                         break;
 727                                 }
 728                         }
 729                 }
 730         }
 731         fclose(out);
 732         return 0;
 733 }
 734
 735 int conf_write(const char *name)
 736 {
 737         FILE *out;
 738         struct symbol *sym;
 739         struct menu *menu;
 740         const char *basename;
 741         const char *str;
 742         char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
 743         char *env;
 744
 745         dirname[0] = 0;
 746         if (name && name[0]) {
 747                 struct stat st;
 748                 char *slash;
 749
 750                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 751                         strcpy(dirname, name);
 752                         strcat(dirname, "/");
 753                         basename = conf_get_configname();
 754                 } else if ((slash = strrchr(name, '/'))) {
 755                         int size = slash - name + 1;
 756                         memcpy(dirname, name, size);
 757                         dirname[size] = 0;
 758                         if (slash[1])
 759                                 basename = slash + 1;
 760                         else
 761                                 basename = conf_get_configname();
 762                 } else
 763                         basename = name;
 764         } else
 765                 basename = conf_get_configname();
 766
 767         sprintf(newname, "%s%s", dirname, basename);
 768         env = getenv("KCONFIG_OVERWRITECONFIG");
 769         if (!env || !*env) {
 770                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
 771                 out = fopen(tmpname, "w");
 772         } else {
 773                 *tmpname = 0;
 774                 out = fopen(newname, "w");
 775         }
 776         if (!out)
 777                 return 1;
 778
 779         conf_write_heading(out, &kconfig_printer_cb, NULL);
 780
 781         if (!conf_get_changed())
 782                 sym_clear_all_valid();
 783
 784         menu = rootmenu.list;
 785         while (menu) {
 786                 sym = menu->sym;
 787                 if (!sym) {
 788                         if (!menu_is_visible(menu))
 789                                 goto next;
 790                         str = menu_get_prompt(menu);
 791                         fprintf(out, "\n"
 792                                      "#\n"
 793                                      "# %s\n"
 794                                      "#\n", str);
 795                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 796                         sym_calc_value(sym);
 797                         if (!(sym->flags & SYMBOL_WRITE))
 798                                 goto next;
 799                         sym->flags &= ~SYMBOL_WRITE;
 800
 801                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 802                 }
 803
 804 next:
 805                 if (menu->list) {
 806                         menu = menu->list;
 807                         continue;
 808                 }
 809                 if (menu->next)
 810                         menu = menu->next;
 811                 else while ((menu = menu->parent)) {
 812                         if (menu->next) {
 813                                 menu = menu->next;
 814                                 break;
 815                         }
 816                 }
 817         }
 818         fclose(out);
 819
 820         if (*tmpname) {
 821                 strcat(dirname, basename);
 822                 strcat(dirname, ".old");
 823                 rename(newname, dirname);
 824                 if (rename(tmpname, newname))
 825                         return 1;
 826         }
 827
 828         conf_message(_("configuration written to %s"), newname);
 829
 830         sym_set_change_count(0);
 831
 832         return 0;
 833 }
 834
 835 static int conf_split_config(void)
 836 {
 837         const char *name;
 838         char path[PATH_MAX+1];
 839         char *s, *d, c;
 840         struct symbol *sym;
 841         struct stat sb;
 842         int res, i, fd;
 843
 844         name = conf_get_autoconfig_name();
 845         conf_read_simple(name, S_DEF_AUTO);
 846
 847         if (chdir("include/config"))
 848                 return 1;
 849
 850         res = 0;
 851         for_all_symbols(i, sym) {
 852                 sym_calc_value(sym);
 853                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 854                         continue;
 855                 if (sym->flags & SYMBOL_WRITE) {
 856                         if (sym->flags & SYMBOL_DEF_AUTO) {
 857                                 /*
 858                                  * symbol has old and new value,
 859                                  * so compare them...
 860                                  */
 861                                 switch (sym->type) {
 862                                 case S_BOOLEAN:
 863                                 case S_TRISTATE:
 864                                         if (sym_get_tristate_value(sym) ==
 865                                             sym->def[S_DEF_AUTO].tri)
 866                                                 continue;
 867                                         break;
 868                                 case S_STRING:
 869                                 case S_HEX:
 870                                 case S_INT:
 871                                         if (!strcmp(sym_get_string_value(sym),
 872                                                     sym->def[S_DEF_AUTO].val))
 873                                                 continue;
 874                                         break;
 875                                 default:
 876                                         break;
 877                                 }
 878                         } else {
 879                                 /*
 880                                  * If there is no old value, only 'no' (unset)
 881                                  * is allowed as new value.
 882                                  */
 883                                 switch (sym->type) {
 884                                 case S_BOOLEAN:
 885                                 case S_TRISTATE:
 886                                         if (sym_get_tristate_value(sym) == no)
 887                                                 continue;
 888                                         break;
 889                                 default:
 890                                         break;
 891                                 }
 892                         }
 893                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 894                         /* There is neither an old nor a new value. */
 895                         continue;
 896                 /* else
 897                  *      There is an old value, but no new value ('no' (unset)
 898                  *      isn't saved in auto.conf, so the old value is always
 899                  *      different from 'no').
 900                  */
 901
 902                 /* Replace all '_' and append ".h" */
 903                 s = sym->name;
 904                 d = path;
 905                 while ((c = *s++)) {
 906                         c = tolower(c);
 907                         *d++ = (c == '_') ? '/' : c;
 908                 }
 909                 strcpy(d, ".h");
 910
 911                 /* Assume directory path already exists. */
 912                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 913                 if (fd == -1) {
 914                         if (errno != ENOENT) {
 915                                 res = 1;
 916                                 break;
 917                         }
 918                         /*
 919                          * Create directory components,
 920                          * unless they exist already.
 921                          */
 922                         d = path;
 923                         while ((d = strchr(d, '/'))) {
 924                                 *d = 0;
 925                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 926                                         res = 1;
 927                                         goto out;
 928                                 }
 929                                 *d++ = '/';
 930                         }
 931                         /* Try it again. */
 932                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 933                         if (fd == -1) {
 934                                 res = 1;
 935                                 break;
 936                         }
 937                 }
 938                 close(fd);
 939         }
 940 out:
 941         if (chdir("../.."))
 942                 return 1;
 943
 944         return res;
 945 }
 946
 947 int conf_write_autoconf(void)
 948 {
 949         struct symbol *sym;
 950         const char *name;
 951         FILE *out, *tristate, *out_h;
 952         int i;
 953
 954         sym_clear_all_valid();
 955
 956         file_write_dep("include/config/auto.conf.cmd");
 957
 958         if (conf_split_config())
 959                 return 1;
 960
 961         out = fopen(".tmpconfig", "w");
 962         if (!out)
 963                 return 1;
 964
 965         tristate = fopen(".tmpconfig_tristate", "w");
 966         if (!tristate) {
 967                 fclose(out);
 968                 return 1;
 969         }
 970
 971         out_h = fopen(".tmpconfig.h", "w");
 972         if (!out_h) {
 973                 fclose(out);
 974                 fclose(tristate);
 975                 return 1;
 976         }
 977
 978         conf_write_heading(out, &kconfig_printer_cb, NULL);
 979
 980         conf_write_heading(tristate, &tristate_printer_cb, NULL);
 981
 982         conf_write_heading(out_h, &header_printer_cb, NULL);
 983
 984         for_all_symbols(i, sym) {
 985                 sym_calc_value(sym);
 986                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 987                         continue;
 988
 989                 /* write symbol to auto.conf, tristate and header files */
 990                 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
 991
 992                 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
 993
 994                 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
 995         }
 996         fclose(out);
 997         fclose(tristate);
 998         fclose(out_h);
 999
1000         name = getenv("KCONFIG_AUTOHEADER");
1001         if (!name)
1002                 name = "include/generated/autoconf.h";
1003         if (rename(".tmpconfig.h", name))
1004                 return 1;
1005         name = getenv("KCONFIG_TRISTATE");
1006         if (!name)
1007                 name = "include/config/tristate.conf";
1008         if (rename(".tmpconfig_tristate", name))
1009                 return 1;
1010         name = conf_get_autoconfig_name();
1011         /*
1012          * This must be the last step, kbuild has a dependency on auto.conf
1013          * and this marks the successful completion of the previous steps.
1014          */
1015         if (rename(".tmpconfig", name))
1016                 return 1;
1017
1018         return 0;
1019 }
1020
1021 static int sym_change_count;
1022 static void (*conf_changed_callback)(void);
1023
1024 void sym_set_change_count(int count)
1025 {
1026         int _sym_change_count = sym_change_count;
1027         sym_change_count = count;
1028         if (conf_changed_callback &&
1029             (bool)_sym_change_count != (bool)count)
1030                 conf_changed_callback();
1031 }
1032
1033 void sym_add_change_count(int count)
1034 {
1035         sym_set_change_count(count + sym_change_count);
1036 }
1037
1038 bool conf_get_changed(void)
1039 {
1040         return sym_change_count;
1041 }
1042
1043 void conf_set_changed_callback(void (*fn)(void))
1044 {
1045         conf_changed_callback = fn;
1046 }
1047
1048 static bool randomize_choice_values(struct symbol *csym)
1049 {
1050         struct property *prop;
1051         struct symbol *sym;
1052         struct expr *e;
1053         int cnt, def;
1054
1055         /*
1056          * If choice is mod then we may have more items selected
1057          * and if no then no-one.
1058          * In both cases stop.
1059          */
1060         if (csym->curr.tri != yes)
1061                 return false;
1062
1063         prop = sym_get_choice_prop(csym);
1064
1065         /* count entries in choice block */
1066         cnt = 0;
1067         expr_list_for_each_sym(prop->expr, e, sym)
1068                 cnt++;
1069
1070         /*
1071          * find a random value and set it to yes,
1072          * set the rest to no so we have only one set
1073          */
1074         def = (rand() % cnt);
1075
1076         cnt = 0;
1077         expr_list_for_each_sym(prop->expr, e, sym) {
1078                 if (def == cnt++) {
1079                         sym->def[S_DEF_USER].tri = yes;
1080                         csym->def[S_DEF_USER].val = sym;
1081                 }
1082                 else {
1083                         sym->def[S_DEF_USER].tri = no;
1084                 }
1085                 sym->flags |= SYMBOL_DEF_USER;
1086                 /* clear VALID to get value calculated */
1087                 sym->flags &= ~SYMBOL_VALID;
1088         }
1089         csym->flags |= SYMBOL_DEF_USER;
1090         /* clear VALID to get value calculated */
1091         csym->flags &= ~(SYMBOL_VALID);
1092
1093         return true;
1094 }
1095
1096 void set_all_choice_values(struct symbol *csym)
1097 {
1098         struct property *prop;
1099         struct symbol *sym;
1100         struct expr *e;
1101
1102         prop = sym_get_choice_prop(csym);
1103
1104         /*
1105          * Set all non-assinged choice values to no
1106          */
1107         expr_list_for_each_sym(prop->expr, e, sym) {
1108                 if (!sym_has_value(sym))
1109                         sym->def[S_DEF_USER].tri = no;
1110         }
1111         csym->flags |= SYMBOL_DEF_USER;
1112         /* clear VALID to get value calculated */
1113         csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1114 }
1115
1116 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1117 {
1118         struct symbol *sym, *csym;
1119         int i, cnt, pby, pty, ptm;      /* pby: probability of boolean  = y
1120                                          * pty: probability of tristate = y
1121                                          * ptm: probability of tristate = m
1122                                          */
1123
1124         pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1125                                    * below, otherwise gcc whines about
1126                                    * -Wmaybe-uninitialized */
1127         if (mode == def_random) {
1128                 int n, p[3];
1129                 char *env = getenv("KCONFIG_PROBABILITY");
1130                 n = 0;
1131                 while( env && *env ) {
1132                         char *endp;
1133                         int tmp = strtol( env, &endp, 10 );
1134                         if( tmp >= 0 && tmp <= 100 ) {
1135                                 p[n++] = tmp;
1136                         } else {
1137                                 errno = ERANGE;
1138                                 perror( "KCONFIG_PROBABILITY" );
1139                                 exit( 1 );
1140                         }
1141                         env = (*endp == ':') ? endp+1 : endp;
1142                         if( n >=3 ) {
1143                                 break;
1144                         }
1145                 }
1146                 switch( n ) {
1147                 case 1:
1148                         pby = p[0]; ptm = pby/2; pty = pby-ptm;
1149                         break;
1150                 case 2:
1151                         pty = p[0]; ptm = p[1]; pby = pty + ptm;
1152                         break;
1153                 case 3:
1154                         pby = p[0]; pty = p[1]; ptm = p[2];
1155                         break;
1156                 }
1157
1158                 if( pty+ptm > 100 ) {
1159                         errno = ERANGE;
1160                         perror( "KCONFIG_PROBABILITY" );
1161                         exit( 1 );
1162                 }
1163         }
1164         bool has_changed = false;
1165
1166         for_all_symbols(i, sym) {
1167                 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1168                         continue;
1169                 switch (sym_get_type(sym)) {
1170                 case S_BOOLEAN:
1171                 case S_TRISTATE:
1172                         has_changed = true;
1173                         switch (mode) {
1174                         case def_yes:
1175                                 sym->def[S_DEF_USER].tri = yes;
1176                                 break;
1177                         case def_mod:
1178                                 sym->def[S_DEF_USER].tri = mod;
1179                                 break;
1180                         case def_no:
1181                                 sym->def[S_DEF_USER].tri = no;
1182                                 break;
1183                         case def_random:
1184                                 sym->def[S_DEF_USER].tri = no;
1185                                 cnt = rand() % 100;
1186                                 if (sym->type == S_TRISTATE) {
1187                                         if (cnt < pty)
1188                                                 sym->def[S_DEF_USER].tri = yes;
1189                                         else if (cnt < (pty+ptm))
1190                                                 sym->def[S_DEF_USER].tri = mod;
1191                                 } else if (cnt < pby)
1192                                         sym->def[S_DEF_USER].tri = yes;
1193                                 break;
1194                         default:
1195                                 continue;
1196                         }
1197                         if (!(sym_is_choice(sym) && mode == def_random))
1198                                 sym->flags |= SYMBOL_DEF_USER;
1199                         break;
1200                 default:
1201                         break;
1202                 }
1203
1204         }
1205
1206         sym_clear_all_valid();
1207
1208         /*
1209          * We have different type of choice blocks.
1210          * If curr.tri equals to mod then we can select several
1211          * choice symbols in one block.
1212          * In this case we do nothing.
1213          * If curr.tri equals yes then only one symbol can be
1214          * selected in a choice block and we set it to yes,
1215          * and the rest to no.
1216          */
1217         if (mode != def_random) {
1218                 for_all_symbols(i, csym) {
1219                         if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1220                             sym_is_choice_value(csym))
1221                                 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1222                 }
1223         }
1224
1225         for_all_symbols(i, csym) {
1226                 if (sym_has_value(csym) || !sym_is_choice(csym))
1227                         continue;
1228
1229                 sym_calc_value(csym);
1230                 if (mode == def_random)
1231                         has_changed = randomize_choice_values(csym);
1232                 else {
1233                         set_all_choice_values(csym);
1234                         has_changed = true;
1235                 }
1236         }
1237
1238         return has_changed;
1239 }