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 struct conf_printer {
  20         void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
  21         void (*print_comment)(FILE *, const char *, void *);
  22 };
  23
  24 static void conf_warning(const char *fmt, ...)
  25         __attribute__ ((format (printf, 1, 2)));
  26
  27 static void conf_message(const char *fmt, ...)
  28         __attribute__ ((format (printf, 1, 2)));
  29
  30 static const char *conf_filename;
  31 static int conf_lineno, conf_warnings, conf_unsaved;
  32
  33 const char conf_defname[] = "include/generated/defconfig";
  34
  35 static void conf_warning(const char *fmt, ...)
  36 {
  37         va_list ap;
  38         va_start(ap, fmt);
  39         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  40         vfprintf(stderr, fmt, ap);
  41         fprintf(stderr, "\n");
  42         va_end(ap);
  43         conf_warnings++;
  44 }
  45
  46 static void conf_default_message_callback(const char *fmt, va_list ap)
  47 {
  48         printf("#\n# ");
  49         vprintf(fmt, ap);
  50         printf("\n#\n");
  51 }
  52
  53 static void (*conf_message_callback) (const char *fmt, va_list ap) =
  54         conf_default_message_callback;
  55 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
  56 {
  57         conf_message_callback = fn;
  58 }
  59
  60 static void conf_message(const char *fmt, ...)
  61 {
  62         va_list ap;
  63
  64         va_start(ap, fmt);
  65         if (conf_message_callback)
  66                 conf_message_callback(fmt, ap);
  67         va_end(ap);
  68 }
  69
  70 const char *conf_get_configname(void)
  71 {
  72         char *name = getenv("KCONFIG_CONFIG");
  73
  74         return name ? name : ".config";
  75 }
  76
  77 const char *conf_get_autoconfig_name(void)
  78 {
  79         char *name = getenv("KCONFIG_AUTOCONFIG");
  80
  81         return name ? name : "include/generated/auto.conf";
  82 }
  83
  84 static char *conf_expand_value(const char *in)
  85 {
  86         struct symbol *sym;
  87         const char *src;
  88         static char res_value[SYMBOL_MAXLENGTH];
  89         char *dst, name[SYMBOL_MAXLENGTH];
  90
  91         res_value[0] = 0;
  92         dst = name;
  93         while ((src = strchr(in, '$'))) {
  94                 strncat(res_value, in, src - in);
  95                 src++;
  96                 dst = name;
  97                 while (isalnum(*src) || *src == '_')
  98                         *dst++ = *src++;
  99                 *dst = 0;
 100                 sym = sym_lookup(name, 0);
 101                 sym_calc_value(sym);
 102                 strcat(res_value, sym_get_string_value(sym));
 103                 in = src;
 104         }
 105         strcat(res_value, in);
 106
 107         return res_value;
 108 }
 109
 110 char *conf_get_default_confname(void)
 111 {
 112         struct stat buf;
 113         static char fullname[PATH_MAX+1];
 114         char *env, *name;
 115
 116         name = conf_expand_value(conf_defname);
 117         env = getenv(SRCTREE);
 118         if (env) {
 119                 sprintf(fullname, "%s/%s", env, name);
 120                 if (!stat(fullname, &buf))
 121                         return fullname;
 122         }
 123         return name;
 124 }
 125
 126 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
 127 {
 128         char *p2;
 129
 130         switch (sym->type) {
 131         case S_TRISTATE:
 132                 if (p[0] == 'm') {
 133                         sym->def[def].tri = mod;
 134                         sym->flags |= def_flags;
 135                         break;
 136                 }
 137                 /* fall through */
 138         case S_BOOLEAN:
 139                 if (p[0] == 'y') {
 140                         sym->def[def].tri = yes;
 141                         sym->flags |= def_flags;
 142                         break;
 143                 }
 144                 if (p[0] == 'n') {
 145                         sym->def[def].tri = no;
 146                         sym->flags |= def_flags;
 147                         break;
 148                 }
 149                 if (def != S_DEF_AUTO)
 150                         conf_warning("symbol value '%s' invalid for %s",
 151                                      p, sym->name);
 152                 return 1;
 153         case S_OTHER:
 154                 if (*p != '"') {
 155                         for (p2 = p; *p2 && !isspace(*p2); p2++)
 156                                 ;
 157                         sym->type = S_STRING;
 158                         goto done;
 159                 }
 160                 /* fall through */
 161         case S_STRING:
 162                 if (*p++ != '"')
 163                         break;
 164                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 165                         if (*p2 == '"') {
 166                                 *p2 = 0;
 167                                 break;
 168                         }
 169                         memmove(p2, p2 + 1, strlen(p2));
 170                 }
 171                 if (!p2) {
 172                         if (def != S_DEF_AUTO)
 173                                 conf_warning("invalid string found");
 174                         return 1;
 175                 }
 176                 /* fall through */
 177         case S_INT:
 178         case S_HEX:
 179         done:
 180                 if (sym_string_valid(sym, p)) {
 181                         sym->def[def].val = strdup(p);
 182                         sym->flags |= def_flags;
 183                 } else {
 184                         if (def != S_DEF_AUTO)
 185                                 conf_warning("symbol value '%s' invalid for %s",
 186                                              p, sym->name);
 187                         return 1;
 188                 }
 189                 break;
 190         default:
 191                 ;
 192         }
 193         return 0;
 194 }
 195
 196 #define LINE_GROWTH 16
 197 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
 198 {
 199         char *nline;
 200         size_t new_size = slen + 1;
 201         if (new_size > *n) {
 202                 new_size += LINE_GROWTH - 1;
 203                 new_size *= 2;
 204                 nline = realloc(*lineptr, new_size);
 205                 if (!nline)
 206                         return -1;
 207
 208                 *lineptr = nline;
 209                 *n = new_size;
 210         }
 211
 212         (*lineptr)[slen] = c;
 213
 214         return 0;
 215 }
 216
 217 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
 218 {
 219         char *line = *lineptr;
 220         size_t slen = 0;
 221
 222         for (;;) {
 223                 int c = getc(stream);
 224
 225                 switch (c) {
 226                 case '\n':
 227                         if (add_byte(c, &line, slen, n) < 0)
 228                                 goto e_out;
 229                         slen++;
 230                         /* fall through */
 231                 case EOF:
 232                         if (add_byte('\0', &line, slen, n) < 0)
 233                                 goto e_out;
 234                         *lineptr = line;
 235                         if (slen == 0)
 236                                 return -1;
 237                         return slen;
 238                 default:
 239                         if (add_byte(c, &line, slen, n) < 0)
 240                                 goto e_out;
 241                         slen++;
 242                 }
 243         }
 244
 245 e_out:
 246         line[slen-1] = '\0';
 247         *lineptr = line;
 248         return -1;
 249 }
 250
 251 int conf_read_simple(const char *name, int def)
 252 {
 253         FILE *in = NULL;
 254         char   *line = NULL;
 255         size_t  line_asize = 0;
 256         char *p, *p2;
 257         struct symbol *sym;
 258         int i, def_flags;
 259
 260         if (name) {
 261                 in = zconf_fopen(name);
 262         } else {
 263                 struct property *prop;
 264
 265                 name = conf_get_configname();
 266                 in = zconf_fopen(name);
 267                 if (in)
 268                         goto load;
 269                 sym_add_change_count(1);
 270                 if (!sym_defconfig_list)
 271                         return 1;
 272
 273                 for_all_defaults(sym_defconfig_list, prop) {
 274                         if (expr_calc_value(prop->visible.expr) == no ||
 275                             prop->expr->type != E_SYMBOL)
 276                                 continue;
 277                         name = conf_expand_value(prop->expr->left.sym->name);
 278                         in = zconf_fopen(name);
 279                         if (in) {
 280                                 conf_message(_("using defaults found in %s"),
 281                                          name);
 282                                 goto load;
 283                         }
 284                 }
 285         }
 286         if (!in)
 287                 return 1;
 288
 289 load:
 290         conf_filename = name;
 291         conf_lineno = 0;
 292         conf_warnings = 0;
 293         conf_unsaved = 0;
 294
 295         def_flags = SYMBOL_DEF << def;
 296         for_all_symbols(i, sym) {
 297                 sym->flags |= SYMBOL_CHANGED;
 298                 sym->flags &= ~(def_flags|SYMBOL_VALID);
 299                 if (sym_is_choice(sym))
 300                         sym->flags |= def_flags;
 301                 switch (sym->type) {
 302                 case S_INT:
 303                 case S_HEX:
 304                 case S_STRING:
 305                         if (sym->def[def].val)
 306                                 free(sym->def[def].val);
 307                         /* fall through */
 308                 default:
 309                         sym->def[def].val = NULL;
 310                         sym->def[def].tri = no;
 311                 }
 312         }
 313
 314         while (compat_getline(&line, &line_asize, in) != -1) {
 315                 conf_lineno++;
 316                 sym = NULL;
 317                 if (line[0] == '#') {
 318                         if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
 319                                 continue;
 320                         p = strchr(line + 2 + strlen(CONFIG_), ' ');
 321                         if (!p)
 322                                 continue;
 323                         *p++ = 0;
 324                         if (strncmp(p, "is not set", 10))
 325                                 continue;
 326                         if (def == S_DEF_USER) {
 327                                 sym = sym_find(line + 2 + strlen(CONFIG_));
 328                                 if (!sym) {
 329                                         sym_add_change_count(1);
 330                                         goto setsym;
 331                                 }
 332                         } else {
 333                                 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
 334                                 if (sym->type == S_UNKNOWN)
 335                                         sym->type = S_BOOLEAN;
 336                         }
 337                         if (sym->flags & def_flags) {
 338                                 conf_warning("override: reassigning to symbol %s", sym->name);
 339                         }
 340                         switch (sym->type) {
 341                         case S_BOOLEAN:
 342                         case S_TRISTATE:
 343                                 sym->def[def].tri = no;
 344                                 sym->flags |= def_flags;
 345                                 break;
 346                         default:
 347                                 ;
 348                         }
 349                 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
 350                         p = strchr(line + strlen(CONFIG_), '=');
 351                         if (!p)
 352                                 continue;
 353                         *p++ = 0;
 354                         p2 = strchr(p, '\n');
 355                         if (p2) {
 356                                 *p2-- = 0;
 357                                 if (*p2 == '\r')
 358                                         *p2 = 0;
 359                         }
 360                         if (def == S_DEF_USER) {
 361                                 sym = sym_find(line + strlen(CONFIG_));
 362                                 if (!sym) {
 363                                         sym_add_change_count(1);
 364                                         goto setsym;
 365                                 }
 366                         } else {
 367                                 sym = sym_lookup(line + strlen(CONFIG_), 0);
 368                                 if (sym->type == S_UNKNOWN)
 369                                         sym->type = S_OTHER;
 370                         }
 371                         if (sym->flags & def_flags) {
 372                                 conf_warning("override: reassigning to symbol %s", sym->name);
 373                         }
 374                         if (conf_set_sym_val(sym, def, def_flags, p))
 375                                 continue;
 376                 } else {
 377                         if (line[0] != '\r' && line[0] != '\n')
 378                                 conf_warning("unexpected data");
 379                         continue;
 380                 }
 381 setsym:
 382                 if (sym && sym_is_choice_value(sym)) {
 383                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 384                         switch (sym->def[def].tri) {
 385                         case no:
 386                                 break;
 387                         case mod:
 388                                 if (cs->def[def].tri == yes) {
 389                                         conf_warning("%s creates inconsistent choice state", sym->name);
 390                                         cs->flags &= ~def_flags;
 391                                 }
 392                                 break;
 393                         case yes:
 394                                 if (cs->def[def].tri != no)
 395                                         conf_warning("override: %s changes choice state", sym->name);
 396                                 cs->def[def].val = sym;
 397                                 break;
 398                         }
 399                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
 400                 }
 401         }
 402         free(line);
 403         fclose(in);
 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                 sym_calc_value(modules_sym);
 416                 return 1;
 417         }
 418
 419         sym_calc_value(modules_sym);
 420
 421         for_all_symbols(i, sym) {
 422                 sym_calc_value(sym);
 423                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 424                         continue;
 425                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 426                         /* check that calculated value agrees with saved value */
 427                         switch (sym->type) {
 428                         case S_BOOLEAN:
 429                         case S_TRISTATE:
 430                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
 431                                         break;
 432                                 if (!sym_is_choice(sym))
 433                                         continue;
 434                                 /* fall through */
 435                         default:
 436                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
 437                                         continue;
 438                                 break;
 439                         }
 440                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 441                         /* no previous value and not saved */
 442                         continue;
 443                 conf_unsaved++;
 444                 /* maybe print value in verbose mode... */
 445         }
 446
 447         for_all_symbols(i, sym) {
 448                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 449                         /* Reset values of generates values, so they'll appear
 450                          * as new, if they should become visible, but that
 451                          * doesn't quite work if the Kconfig and the saved
 452                          * configuration disagree.
 453                          */
 454                         if (sym->visible == no && !conf_unsaved)
 455                                 sym->flags &= ~SYMBOL_DEF_USER;
 456                         switch (sym->type) {
 457                         case S_STRING:
 458                         case S_INT:
 459                         case S_HEX:
 460                                 /* Reset a string value if it's out of range */
 461                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
 462                                         break;
 463                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
 464                                 conf_unsaved++;
 465                                 break;
 466                         default:
 467                                 break;
 468                         }
 469                 }
 470         }
 471
 472         sym_add_change_count(conf_warnings || conf_unsaved);
 473
 474         return 0;
 475 }
 476
 477 /*
 478  * Kconfig configuration printer
 479  *
 480  * This printer is used when generating the resulting configuration after
 481  * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
 482  * passing a non-NULL argument to the printer.
 483  *
 484  */
 485 static void
 486 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 487 {
 488
 489         switch (sym->type) {
 490         case S_BOOLEAN:
 491         case S_TRISTATE:
 492                 if (*value == 'n') {
 493                         bool skip_unset = (arg != NULL);
 494
 495                         if (!skip_unset)
 496                                 fprintf(fp, "# %s%s is not set\n",
 497                                     CONFIG_, sym->name);
 498                         return;
 499                 }
 500                 break;
 501         default:
 502                 break;
 503         }
 504
 505         fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
 506 }
 507
 508 static void
 509 kconfig_print_cmake_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 510 {
 511
 512         switch (sym->type) {
 513         case S_BOOLEAN:
 514         case S_TRISTATE:
 515                 if (*value == 'n') {
 516                         bool skip_unset = (arg != NULL);
 517
 518                         if (!skip_unset)
 519                                 fprintf(fp, "set(%s%s false)\n",
 520                                         CONFIG_, sym->name, value);
 521                         return;
 522                 } else if (*value == 'm') {
 523                         abort();
 524                 } else {
 525                         fprintf(fp, "set(%s%s true)\n", CONFIG_, sym->name, value);
 526                 }
 527                 break;
 528         case S_HEX: {
 529                 const char *prefix = "";
 530
 531                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
 532                         prefix = "0x";
 533                 fprintf(fp, "set(%s%s %s%s)\n",
 534                     CONFIG_, sym->name, prefix, value);
 535                 break;
 536         }
 537         case S_STRING:
 538         case S_INT:
 539                 fprintf(fp, "set(%s%s %s)\n",
 540                     CONFIG_, sym->name, value);
 541                 break;
 542         default:
 543                 break;
 544         }
 545
 546 }
 547
 548 static void
 549 kconfig_print_comment(FILE *fp, const char *value, void *arg)
 550 {
 551         const char *p = value;
 552         size_t l;
 553
 554         for (;;) {
 555                 l = strcspn(p, "\n");
 556                 fprintf(fp, "#");
 557                 if (l) {
 558                         fprintf(fp, " ");
 559                         xfwrite(p, l, 1, fp);
 560                         p += l;
 561                 }
 562                 fprintf(fp, "\n");
 563                 if (*p++ == '\0')
 564                         break;
 565         }
 566 }
 567
 568 static struct conf_printer kconfig_printer_cb =
 569 {
 570         .print_symbol = kconfig_print_symbol,
 571         .print_comment = kconfig_print_comment,
 572 };
 573
 574 static struct conf_printer kconfig_printer_cmake_cb =
 575 {
 576         .print_symbol = kconfig_print_cmake_symbol,
 577         .print_comment = kconfig_print_comment,
 578 };
 579
 580 /*
 581  * Header printer
 582  *
 583  * This printer is used when generating the `include/generated/autoconf.h' file.
 584  */
 585 static void
 586 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 587 {
 588
 589         switch (sym->type) {
 590         case S_BOOLEAN:
 591         case S_TRISTATE: {
 592                 const char *suffix = "";
 593
 594                 switch (*value) {
 595                 case 'n':
 596                         break;
 597                 case 'm':
 598                         suffix = "_MODULE";
 599                         /* fall through */
 600                 default:
 601                         fprintf(fp, "#define %s%s%s 1\n",
 602                             CONFIG_, sym->name, suffix);
 603                 }
 604                 break;
 605         }
 606         case S_HEX: {
 607                 const char *prefix = "";
 608
 609                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
 610                         prefix = "0x";
 611                 fprintf(fp, "#define %s%s %s%s\n",
 612                     CONFIG_, sym->name, prefix, value);
 613                 break;
 614         }
 615         case S_STRING:
 616         case S_INT:
 617                 fprintf(fp, "#define %s%s %s\n",
 618                     CONFIG_, sym->name, value);
 619                 break;
 620         default:
 621                 break;
 622         }
 623
 624 }
 625
 626 static void
 627 header_print_comment(FILE *fp, const char *value, void *arg)
 628 {
 629         const char *p = value;
 630         size_t l;
 631
 632         fprintf(fp, "/*\n");
 633         for (;;) {
 634                 l = strcspn(p, "\n");
 635                 fprintf(fp, " *");
 636                 if (l) {
 637                         fprintf(fp, " ");
 638                         xfwrite(p, l, 1, fp);
 639                         p += l;
 640                 }
 641                 fprintf(fp, "\n");
 642                 if (*p++ == '\0')
 643                         break;
 644         }
 645         fprintf(fp, " */\n");
 646 }
 647
 648 static struct conf_printer header_printer_cb =
 649 {
 650         .print_symbol = header_print_symbol,
 651         .print_comment = header_print_comment,
 652 };
 653
 654 /*
 655  * Tristate printer
 656  *
 657  * This printer is used when generating the `include/generated/tristate.conf' file.
 658  */
 659 static void
 660 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 661 {
 662
 663         if (sym->type == S_TRISTATE && *value != 'n')
 664                 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
 665 }
 666
 667 static struct conf_printer tristate_printer_cb =
 668 {
 669         .print_symbol = tristate_print_symbol,
 670         .print_comment = kconfig_print_comment,
 671 };
 672
 673 static void conf_write_symbol(FILE *fp, struct symbol *sym,
 674                               struct conf_printer *printer, void *printer_arg)
 675 {
 676         const char *str;
 677
 678         switch (sym->type) {
 679         case S_OTHER:
 680         case S_UNKNOWN:
 681                 break;
 682         case S_STRING:
 683                 str = sym_get_string_value(sym);
 684                 str = sym_escape_string_value(str);
 685                 printer->print_symbol(fp, sym, str, printer_arg);
 686                 free((void *)str);
 687                 break;
 688         default:
 689                 str = sym_get_string_value(sym);
 690                 printer->print_symbol(fp, sym, str, printer_arg);
 691         }
 692 }
 693
 694 static void
 695 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
 696 {
 697         char buf[256];
 698
 699         snprintf(buf, sizeof(buf),
 700             "\n"
 701             "Automatically generated file; DO NOT EDIT.\n"
 702             "%s\n",
 703             rootmenu.prompt->text);
 704
 705         printer->print_comment(fp, buf, printer_arg);
 706 }
 707
 708 /*
 709  * Write out a minimal config.
 710  * All values that has default values are skipped as this is redundant.
 711  */
 712 int conf_write_defconfig(const char *filename)
 713 {
 714         struct symbol *sym;
 715         struct menu *menu;
 716         FILE *out;
 717
 718         out = fopen(filename, "w");
 719         if (!out)
 720                 return 1;
 721
 722         sym_clear_all_valid();
 723
 724         /* Traverse all menus to find all relevant symbols */
 725         menu = rootmenu.list;
 726
 727         while (menu != NULL)
 728         {
 729                 sym = menu->sym;
 730                 if (sym == NULL) {
 731                         if (!menu_is_visible(menu))
 732                                 goto next_menu;
 733                 } else if (!sym_is_choice(sym)) {
 734                         sym_calc_value(sym);
 735                         if (!(sym->flags & SYMBOL_WRITE))
 736                                 goto next_menu;
 737                         sym->flags &= ~SYMBOL_WRITE;
 738                         /* If we cannot change the symbol - skip */
 739                         if (!sym_is_changable(sym))
 740                                 goto next_menu;
 741                         /* If symbol equals to default value - skip */
 742                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
 743                                 goto next_menu;
 744
 745                         /*
 746                          * If symbol is a choice value and equals to the
 747                          * default for a choice - skip.
 748                          * But only if value is bool and equal to "y" and
 749                          * choice is not "optional".
 750                          * (If choice is "optional" then all values can be "n")
 751                          */
 752                         if (sym_is_choice_value(sym)) {
 753                                 struct symbol *cs;
 754                                 struct symbol *ds;
 755
 756                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
 757                                 ds = sym_choice_default(cs);
 758                                 if (!sym_is_optional(cs) && sym == ds) {
 759                                         if ((sym->type == S_BOOLEAN) &&
 760                                             sym_get_tristate_value(sym) == yes)
 761                                                 goto next_menu;
 762                                 }
 763                         }
 764                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 765                 }
 766 next_menu:
 767                 if (menu->list != NULL) {
 768                         menu = menu->list;
 769                 }
 770                 else if (menu->next != NULL) {
 771                         menu = menu->next;
 772                 } else {
 773                         while ((menu = menu->parent)) {
 774                                 if (menu->next != NULL) {
 775                                         menu = menu->next;
 776                                         break;
 777                                 }
 778                         }
 779                 }
 780         }
 781         fclose(out);
 782         return 0;
 783 }
 784
 785 int conf_write(const char *name)
 786 {
 787         FILE *out;
 788         struct symbol *sym;
 789         struct menu *menu;
 790         const char *basename;
 791         const char *str;
 792         char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
 793         char *env;
 794
 795         dirname[0] = 0;
 796         if (name && name[0]) {
 797                 struct stat st;
 798                 char *slash;
 799
 800                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 801                         strcpy(dirname, name);
 802                         strcat(dirname, "/");
 803                         basename = conf_get_configname();
 804                 } else if ((slash = strrchr(name, '/'))) {
 805                         int size = slash - name + 1;
 806                         memcpy(dirname, name, size);
 807                         dirname[size] = 0;
 808                         if (slash[1])
 809                                 basename = slash + 1;
 810                         else
 811                                 basename = conf_get_configname();
 812                 } else
 813                         basename = name;
 814         } else
 815                 basename = conf_get_configname();
 816
 817         sprintf(newname, "%s%s", dirname, basename);
 818         env = getenv("KCONFIG_OVERWRITECONFIG");
 819         if (!env || !*env) {
 820                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
 821                 out = fopen(tmpname, "w");
 822         } else {
 823                 *tmpname = 0;
 824                 out = fopen(newname, "w");
 825         }
 826         if (!out)
 827                 return 1;
 828
 829         conf_write_heading(out, &kconfig_printer_cb, NULL);
 830
 831         if (!conf_get_changed())
 832                 sym_clear_all_valid();
 833
 834         menu = rootmenu.list;
 835         while (menu) {
 836                 sym = menu->sym;
 837                 if (!sym) {
 838                         if (!menu_is_visible(menu))
 839                                 goto next;
 840                         str = menu_get_prompt(menu);
 841                         fprintf(out, "\n"
 842                                      "#\n"
 843                                      "# %s\n"
 844                                      "#\n", str);
 845                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 846                         sym_calc_value(sym);
 847                         if (!(sym->flags & SYMBOL_WRITE))
 848                                 goto next;
 849                         sym->flags &= ~SYMBOL_WRITE;
 850
 851                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 852                 }
 853
 854 next:
 855                 if (menu->list) {
 856                         menu = menu->list;
 857                         continue;
 858                 }
 859                 if (menu->next)
 860                         menu = menu->next;
 861                 else while ((menu = menu->parent)) {
 862                         if (menu->next) {
 863                                 menu = menu->next;
 864                                 break;
 865                         }
 866                 }
 867         }
 868         fclose(out);
 869
 870         if (*tmpname) {
 871                 strcat(dirname, basename);
 872                 strcat(dirname, ".old");
 873                 rename(newname, dirname);
 874                 if (rename(tmpname, newname))
 875                         return 1;
 876         }
 877
 878         conf_message(_("configuration written to %s"), newname);
 879
 880         sym_set_change_count(0);
 881
 882         return 0;
 883 }
 884
 885 static int conf_split_config(void)
 886 {
 887         const char *name;
 888         char path[PATH_MAX+1];
 889         char *s, *d, c;
 890         struct symbol *sym;
 891         struct stat sb;
 892         int res, i, fd;
 893
 894         name = conf_get_autoconfig_name();
 895         conf_read_simple(name, S_DEF_AUTO);
 896         sym_calc_value(modules_sym);
 897
 898         if (chdir("include/generated"))
 899                 return 1;
 900
 901         res = 0;
 902         for_all_symbols(i, sym) {
 903                 sym_calc_value(sym);
 904                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 905                         continue;
 906                 if (sym->flags & SYMBOL_WRITE) {
 907                         if (sym->flags & SYMBOL_DEF_AUTO) {
 908                                 /*
 909                                  * symbol has old and new value,
 910                                  * so compare them...
 911                                  */
 912                                 switch (sym->type) {
 913                                 case S_BOOLEAN:
 914                                 case S_TRISTATE:
 915                                         if (sym_get_tristate_value(sym) ==
 916                                             sym->def[S_DEF_AUTO].tri)
 917                                                 continue;
 918                                         break;
 919                                 case S_STRING:
 920                                 case S_HEX:
 921                                 case S_INT:
 922                                         if (!strcmp(sym_get_string_value(sym),
 923                                                     sym->def[S_DEF_AUTO].val))
 924                                                 continue;
 925                                         break;
 926                                 default:
 927                                         break;
 928                                 }
 929                         } else {
 930                                 /*
 931                                  * If there is no old value, only 'no' (unset)
 932                                  * is allowed as new value.
 933                                  */
 934                                 switch (sym->type) {
 935                                 case S_BOOLEAN:
 936                                 case S_TRISTATE:
 937                                         if (sym_get_tristate_value(sym) == no)
 938                                                 continue;
 939                                         break;
 940                                 default:
 941                                         break;
 942                                 }
 943                         }
 944                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 945                         /* There is neither an old nor a new value. */
 946                         continue;
 947                 /* else
 948                  *      There is an old value, but no new value ('no' (unset)
 949                  *      isn't saved in auto.conf, so the old value is always
 950                  *      different from 'no').
 951                  */
 952
 953                 /* Replace all '_' and append ".h" */
 954                 s = sym->name;
 955                 d = path;
 956                 while ((c = *s++)) {
 957                         c = tolower(c);
 958                         *d++ = (c == '_') ? '/' : c;
 959                 }
 960                 strcpy(d, ".h");
 961
 962                 /* Assume directory path already exists. */
 963                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 964                 if (fd == -1) {
 965                         if (errno != ENOENT) {
 966                                 res = 1;
 967                                 break;
 968                         }
 969                         /*
 970                          * Create directory components,
 971                          * unless they exist already.
 972                          */
 973                         d = path;
 974                         while ((d = strchr(d, '/'))) {
 975                                 *d = 0;
 976                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 977                                         res = 1;
 978                                         goto out;
 979                                 }
 980                                 *d++ = '/';
 981                         }
 982                         /* Try it again. */
 983                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 984                         if (fd == -1) {
 985                                 res = 1;
 986                                 break;
 987                         }
 988                 }
 989                 close(fd);
 990         }
 991 out:
 992         if (chdir("../.."))
 993                 return 1;
 994
 995         return res;
 996 }
 997
 998 int conf_write_autoconf(void)
 999 {
1000         struct symbol *sym;
1001         const char *name;
1002         FILE *out, *tristate, *out_h, *out_c;
1003         int i;
1004
1005         sym_clear_all_valid();
1006
1007         file_write_dep("include/generated/auto.conf.cmd");
1008
1009         if (conf_split_config())
1010                 return 1;
1011
1012         out = fopen(".tmpconfig", "w");
1013         if (!out)
1014                 return 1;
1015
1016         tristate = fopen(".tmpconfig_tristate", "w");
1017         if (!tristate) {
1018                 fclose(out);
1019                 return 1;
1020         }
1021
1022         out_h = fopen(".tmpconfig.h", "w");
1023         if (!out_h) {
1024                 fclose(out);
1025                 fclose(tristate);
1026                 return 1;
1027         }
1028
1029         out_c = fopen(".tmpconfig.cmake", "w");
1030         if (!out_c) {
1031                 fclose(out);
1032                 fclose(tristate);
1033                 fclose(out_h);
1034         }
1035
1036         conf_write_heading(out, &kconfig_printer_cb, NULL);
1037
1038         conf_write_heading(tristate, &tristate_printer_cb, NULL);
1039
1040         conf_write_heading(out_h, &header_printer_cb, NULL);
1041
1042         conf_write_heading(out_c, &kconfig_printer_cmake_cb, NULL);
1043
1044         for_all_symbols(i, sym) {
1045                 sym_calc_value(sym);
1046                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1047                         continue;
1048
1049                 /* write symbol to auto.conf, tristate and header files */
1050                 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1051
1052                 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1053
1054                 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1055
1056                 conf_write_symbol(out_c, sym, &kconfig_printer_cmake_cb, NULL);
1057         }
1058         fclose(out);
1059         fclose(tristate);
1060         fclose(out_h);
1061         fclose(out_c);
1062
1063         name = getenv("KCONFIG_AUTOHEADER");
1064         if (!name)
1065                 name = "include/generated/autoconf.h";
1066         if (rename(".tmpconfig.h", name))
1067                 return 1;
1068         name = getenv("KCONFIG_TRISTATE");
1069         if (!name)
1070                 name = "include/generated/tristate.conf";
1071         if (rename(".tmpconfig_tristate", name))
1072                 return 1;
1073         name = getenv("KCONFIG_CMAKE");
1074         if (!name)
1075                 name = "config.cmake";
1076         if (rename(".tmpconfig.cmake", name))
1077                 return 1;
1078         name = conf_get_autoconfig_name();
1079         /*
1080          * This must be the last step, kbuild has a dependency on auto.conf
1081          * and this marks the successful completion of the previous steps.
1082          */
1083         if (rename(".tmpconfig", name))
1084                 return 1;
1085
1086         return 0;
1087 }
1088
1089 static int sym_change_count;
1090 static void (*conf_changed_callback)(void);
1091
1092 void sym_set_change_count(int count)
1093 {
1094         int _sym_change_count = sym_change_count;
1095         sym_change_count = count;
1096         if (conf_changed_callback &&
1097             (bool)_sym_change_count != (bool)count)
1098                 conf_changed_callback();
1099 }
1100
1101 void sym_add_change_count(int count)
1102 {
1103         sym_set_change_count(count + sym_change_count);
1104 }
1105
1106 bool conf_get_changed(void)
1107 {
1108         return sym_change_count;
1109 }
1110
1111 void conf_set_changed_callback(void (*fn)(void))
1112 {
1113         conf_changed_callback = fn;
1114 }
1115
1116 static bool randomize_choice_values(struct symbol *csym)
1117 {
1118         struct property *prop;
1119         struct symbol *sym;
1120         struct expr *e;
1121         int cnt, def;
1122
1123         /*
1124          * If choice is mod then we may have more items selected
1125          * and if no then no-one.
1126          * In both cases stop.
1127          */
1128         if (csym->curr.tri != yes)
1129                 return false;
1130
1131         prop = sym_get_choice_prop(csym);
1132
1133         /* count entries in choice block */
1134         cnt = 0;
1135         expr_list_for_each_sym(prop->expr, e, sym)
1136                 cnt++;
1137
1138         /*
1139          * find a random value and set it to yes,
1140          * set the rest to no so we have only one set
1141          */
1142         def = (rand() % cnt);
1143
1144         cnt = 0;
1145         expr_list_for_each_sym(prop->expr, e, sym) {
1146                 if (def == cnt++) {
1147                         sym->def[S_DEF_USER].tri = yes;
1148                         csym->def[S_DEF_USER].val = sym;
1149                 }
1150                 else {
1151                         sym->def[S_DEF_USER].tri = no;
1152                 }
1153                 sym->flags |= SYMBOL_DEF_USER;
1154                 /* clear VALID to get value calculated */
1155                 sym->flags &= ~SYMBOL_VALID;
1156         }
1157         csym->flags |= SYMBOL_DEF_USER;
1158         /* clear VALID to get value calculated */
1159         csym->flags &= ~(SYMBOL_VALID);
1160
1161         return true;
1162 }
1163
1164 void set_all_choice_values(struct symbol *csym)
1165 {
1166         struct property *prop;
1167         struct symbol *sym;
1168         struct expr *e;
1169
1170         prop = sym_get_choice_prop(csym);
1171
1172         /*
1173          * Set all non-assinged choice values to no
1174          */
1175         expr_list_for_each_sym(prop->expr, e, sym) {
1176                 if (!sym_has_value(sym))
1177                         sym->def[S_DEF_USER].tri = no;
1178         }
1179         csym->flags |= SYMBOL_DEF_USER;
1180         /* clear VALID to get value calculated */
1181         csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1182 }
1183
1184 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1185 {
1186         struct symbol *sym, *csym;
1187         int i, cnt, pby, pty, ptm;      /* pby: probability of boolean  = y
1188                                          * pty: probability of tristate = y
1189                                          * ptm: probability of tristate = m
1190                                          */
1191
1192         pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1193                                    * below, otherwise gcc whines about
1194                                    * -Wmaybe-uninitialized */
1195         if (mode == def_random) {
1196                 int n, p[3];
1197                 char *env = getenv("KCONFIG_PROBABILITY");
1198                 n = 0;
1199                 while( env && *env ) {
1200                         char *endp;
1201                         int tmp = strtol( env, &endp, 10 );
1202                         if( tmp >= 0 && tmp <= 100 ) {
1203                                 p[n++] = tmp;
1204                         } else {
1205                                 errno = ERANGE;
1206                                 perror( "KCONFIG_PROBABILITY" );
1207                                 exit( 1 );
1208                         }
1209                         env = (*endp == ':') ? endp+1 : endp;
1210                         if( n >=3 ) {
1211                                 break;
1212                         }
1213                 }
1214                 switch( n ) {
1215                 case 1:
1216                         pby = p[0]; ptm = pby/2; pty = pby-ptm;
1217                         break;
1218                 case 2:
1219                         pty = p[0]; ptm = p[1]; pby = pty + ptm;
1220                         break;
1221                 case 3:
1222                         pby = p[0]; pty = p[1]; ptm = p[2];
1223                         break;
1224                 }
1225
1226                 if( pty+ptm > 100 ) {
1227                         errno = ERANGE;
1228                         perror( "KCONFIG_PROBABILITY" );
1229                         exit( 1 );
1230                 }
1231         }
1232         bool has_changed = false;
1233
1234         for_all_symbols(i, sym) {
1235                 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1236                         continue;
1237                 switch (sym_get_type(sym)) {
1238                 case S_BOOLEAN:
1239                 case S_TRISTATE:
1240                         has_changed = true;
1241                         switch (mode) {
1242                         case def_yes:
1243                                 sym->def[S_DEF_USER].tri = yes;
1244                                 break;
1245                         case def_mod:
1246                                 sym->def[S_DEF_USER].tri = mod;
1247                                 break;
1248                         case def_no:
1249                                 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1250                                         sym->def[S_DEF_USER].tri = yes;
1251                                 else
1252                                         sym->def[S_DEF_USER].tri = no;
1253                                 break;
1254                         case def_random:
1255                                 sym->def[S_DEF_USER].tri = no;
1256                                 cnt = rand() % 100;
1257                                 if (sym->type == S_TRISTATE) {
1258                                         if (cnt < pty)
1259                                                 sym->def[S_DEF_USER].tri = yes;
1260                                         else if (cnt < (pty+ptm))
1261                                                 sym->def[S_DEF_USER].tri = mod;
1262                                 } else if (cnt < pby)
1263                                         sym->def[S_DEF_USER].tri = yes;
1264                                 break;
1265                         default:
1266                                 continue;
1267                         }
1268                         if (!(sym_is_choice(sym) && mode == def_random))
1269                                 sym->flags |= SYMBOL_DEF_USER;
1270                         break;
1271                 default:
1272                         break;
1273                 }
1274
1275         }
1276
1277         sym_clear_all_valid();
1278
1279         /*
1280          * We have different type of choice blocks.
1281          * If curr.tri equals to mod then we can select several
1282          * choice symbols in one block.
1283          * In this case we do nothing.
1284          * If curr.tri equals yes then only one symbol can be
1285          * selected in a choice block and we set it to yes,
1286          * and the rest to no.
1287          */
1288         if (mode != def_random) {
1289                 for_all_symbols(i, csym) {
1290                         if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1291                             sym_is_choice_value(csym))
1292                                 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1293                 }
1294         }
1295
1296         for_all_symbols(i, csym) {
1297                 if (sym_has_value(csym) || !sym_is_choice(csym))
1298                         continue;
1299
1300                 sym_calc_value(csym);
1301                 if (mode == def_random)
1302                         has_changed = randomize_choice_values(csym);
1303                 else {
1304                         set_all_choice_values(csym);
1305                         has_changed = true;
1306                 }
1307         }
1308
1309         return has_changed;
1310 }