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 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[] = "arch/$ARCH/defconfig";
  34
  35 static void conf_warning(const char *fmt, ...)
  36 {
  37         va_list ap;
  38         va_start(ap, fmt);
  39         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  40         vfprintf(stderr, fmt, ap);
  41         fprintf(stderr, "\n");
  42         va_end(ap);
  43         conf_warnings++;
  44 }
  45
  46 static void conf_default_message_callback(const char *fmt, va_list ap)
  47 {
  48         printf("#\n# ");
  49         vprintf(fmt, ap);
  50         printf("\n#\n");
  51 }
  52
  53 static void (*conf_message_callback) (const char *fmt, va_list ap) =
  54         conf_default_message_callback;
  55 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
  56 {
  57         conf_message_callback = fn;
  58 }
  59
  60 static void conf_message(const char *fmt, ...)
  61 {
  62         va_list ap;
  63
  64         va_start(ap, fmt);
  65         if (conf_message_callback)
  66                 conf_message_callback(fmt, ap);
  67         va_end(ap);
  68 }
  69
  70 const char *conf_get_configname(void)
  71 {
  72         char *name = getenv("KCONFIG_CONFIG");
  73
  74         return name ? name : ".config";
  75 }
  76
  77 const char *conf_get_autoconfig_name(void)
  78 {
  79         char *name = getenv("KCONFIG_AUTOCONFIG");
  80
  81         return name ? name : "include/config/auto.conf";
  82 }
  83
  84 static char *conf_expand_value(const char *in)
  85 {
  86         struct symbol *sym;
  87         const char *src;
  88         static char res_value[SYMBOL_MAXLENGTH];
  89         char *dst, name[SYMBOL_MAXLENGTH];
  90
  91         res_value[0] = 0;
  92         dst = name;
  93         while ((src = strchr(in, '$'))) {
  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                 /* Last char has to be a '"' */
 165                 if (p[strlen(p) - 1] != '"') {
 166                         if (def != S_DEF_AUTO)
 167                                 conf_warning("invalid string found");
 168                         return 1;
 169                 }
 170                 /* Overwrite '"' with \0 for string termination */
 171                 p[strlen(p) - 1] = 0;
 172                 /* fall through */
 173         case S_INT:
 174         case S_HEX:
 175         done:
 176                 if (sym_string_valid(sym, p)) {
 177                         sym->def[def].val = strdup(p);
 178                         sym->flags |= def_flags;
 179                 } else {
 180                         if (def != S_DEF_AUTO)
 181                                 conf_warning("symbol value '%s' invalid for %s",
 182                                              p, sym->name);
 183                         return 1;
 184                 }
 185                 break;
 186         default:
 187                 ;
 188         }
 189         return 0;
 190 }
 191
 192 #define LINE_GROWTH 16
 193 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
 194 {
 195         char *nline;
 196         size_t new_size = slen + 1;
 197         if (new_size > *n) {
 198                 new_size += LINE_GROWTH - 1;
 199                 new_size *= 2;
 200                 nline = realloc(*lineptr, new_size);
 201                 if (!nline)
 202                         return -1;
 203
 204                 *lineptr = nline;
 205                 *n = new_size;
 206         }
 207
 208         (*lineptr)[slen] = c;
 209
 210         return 0;
 211 }
 212
 213 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
 214 {
 215         char *line = *lineptr;
 216         size_t slen = 0;
 217
 218         for (;;) {
 219                 int c = getc(stream);
 220
 221                 switch (c) {
 222                 case '\n':
 223                         if (add_byte(c, &line, slen, n) < 0)
 224                                 goto e_out;
 225                         slen++;
 226                         /* fall through */
 227                 case EOF:
 228                         if (add_byte('\0', &line, slen, n) < 0)
 229                                 goto e_out;
 230                         *lineptr = line;
 231                         if (slen == 0)
 232                                 return -1;
 233                         return slen;
 234                 default:
 235                         if (add_byte(c, &line, slen, n) < 0)
 236                                 goto e_out;
 237                         slen++;
 238                 }
 239         }
 240
 241 e_out:
 242         line[slen-1] = '\0';
 243         *lineptr = line;
 244         return -1;
 245 }
 246
 247 int conf_read_simple(const char *name, int def)
 248 {
 249         FILE *in = NULL;
 250         char   *line = NULL;
 251         size_t  line_asize = 0;
 252         char *p, *p2;
 253         struct symbol *sym;
 254         int i, def_flags;
 255
 256         if (name) {
 257                 in = zconf_fopen(name);
 258         } else {
 259                 struct property *prop;
 260
 261                 name = conf_get_configname();
 262                 in = zconf_fopen(name);
 263                 if (in)
 264                         goto load;
 265                 sym_add_change_count(1);
 266                 if (!sym_defconfig_list) {
 267                         if (modules_sym)
 268                                 sym_calc_value(modules_sym);
 269                         return 1;
 270                 }
 271
 272                 for_all_defaults(sym_defconfig_list, prop) {
 273                         if (expr_calc_value(prop->visible.expr) == no ||
 274                             prop->expr->type != E_SYMBOL)
 275                                 continue;
 276                         name = conf_expand_value(prop->expr->left.sym->name);
 277                         in = zconf_fopen(name);
 278                         if (in) {
 279                                 conf_message(_("using defaults found in %s"),
 280                                          name);
 281                                 goto load;
 282                         }
 283                 }
 284         }
 285         if (!in)
 286                 return 1;
 287
 288 load:
 289         conf_filename = name;
 290         conf_lineno = 0;
 291         conf_warnings = 0;
 292         conf_unsaved = 0;
 293
 294         def_flags = SYMBOL_DEF << def;
 295         for_all_symbols(i, sym) {
 296                 sym->flags |= SYMBOL_CHANGED;
 297                 sym->flags &= ~(def_flags|SYMBOL_VALID);
 298                 if (sym_is_choice(sym))
 299                         sym->flags |= def_flags;
 300                 switch (sym->type) {
 301                 case S_INT:
 302                 case S_HEX:
 303                 case S_STRING:
 304                         if (sym->def[def].val)
 305                                 free(sym->def[def].val);
 306                         /* fall through */
 307                 default:
 308                         sym->def[def].val = NULL;
 309                         sym->def[def].tri = no;
 310                 }
 311         }
 312
 313         while (compat_getline(&line, &line_asize, in) != -1) {
 314                 conf_lineno++;
 315                 sym = NULL;
 316                 if (line[0] == '#') {
 317                         if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
 318                                 continue;
 319                         p = strchr(line + 2 + strlen(CONFIG_), ' ');
 320                         if (!p)
 321                                 continue;
 322                         *p++ = 0;
 323                         if (strncmp(p, "is not set", 10))
 324                                 continue;
 325                         if (def == S_DEF_USER) {
 326                                 sym = sym_find(line + 2 + strlen(CONFIG_));
 327                                 if (!sym) {
 328                                         sym_add_change_count(1);
 329                                         goto setsym;
 330                                 }
 331                         } else {
 332                                 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
 333                                 if (sym->type == S_UNKNOWN)
 334                                         sym->type = S_BOOLEAN;
 335                         }
 336                         if (sym->flags & def_flags) {
 337                                 conf_warning("override: reassigning to symbol %s", sym->name);
 338                         }
 339                         switch (sym->type) {
 340                         case S_BOOLEAN:
 341                         case S_TRISTATE:
 342                                 sym->def[def].tri = no;
 343                                 sym->flags |= def_flags;
 344                                 break;
 345                         default:
 346                                 ;
 347                         }
 348                 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
 349                         p = strchr(line + strlen(CONFIG_), '=');
 350                         if (!p)
 351                                 continue;
 352                         *p++ = 0;
 353                         p2 = strchr(p, '\n');
 354                         if (p2) {
 355                                 *p2-- = 0;
 356                                 if (*p2 == '\r')
 357                                         *p2 = 0;
 358                         }
 359                         if (def == S_DEF_USER) {
 360                                 sym = sym_find(line + strlen(CONFIG_));
 361                                 if (!sym) {
 362                                         sym_add_change_count(1);
 363                                         goto setsym;
 364                                 }
 365                         } else {
 366                                 sym = sym_lookup(line + strlen(CONFIG_), 0);
 367                                 if (sym->type == S_UNKNOWN)
 368                                         sym->type = S_OTHER;
 369                         }
 370                         if (sym->flags & def_flags) {
 371                                 conf_warning("override: reassigning to symbol %s", sym->name);
 372                         }
 373                         if (conf_set_sym_val(sym, def, def_flags, p))
 374                                 continue;
 375                 } else {
 376                         if (line[0] != '\r' && line[0] != '\n')
 377                                 conf_warning("unexpected data");
 378                         continue;
 379                 }
 380 setsym:
 381                 if (sym && sym_is_choice_value(sym)) {
 382                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 383                         switch (sym->def[def].tri) {
 384                         case no:
 385                                 break;
 386                         case mod:
 387                                 if (cs->def[def].tri == yes) {
 388                                         conf_warning("%s creates inconsistent choice state", sym->name);
 389                                         cs->flags &= ~def_flags;
 390                                 }
 391                                 break;
 392                         case yes:
 393                                 if (cs->def[def].tri != no)
 394                                         conf_warning("override: %s changes choice state", sym->name);
 395                                 cs->def[def].val = sym;
 396                                 break;
 397                         }
 398                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
 399                 }
 400         }
 401         free(line);
 402         fclose(in);
 403
 404         if (modules_sym)
 405                 sym_calc_value(modules_sym);
 406         return 0;
 407 }
 408
 409 int conf_read(const char *name)
 410 {
 411         struct symbol *sym;
 412         int i;
 413
 414         sym_set_change_count(0);
 415
 416         if (conf_read_simple(name, S_DEF_USER))
 417                 return 1;
 418
 419         for_all_symbols(i, sym) {
 420                 sym_calc_value(sym);
 421                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 422                         continue;
 423                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 424                         /* check that calculated value agrees with saved value */
 425                         switch (sym->type) {
 426                         case S_BOOLEAN:
 427                         case S_TRISTATE:
 428                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
 429                                         break;
 430                                 if (!sym_is_choice(sym))
 431                                         continue;
 432                                 /* fall through */
 433                         default:
 434                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
 435                                         continue;
 436                                 break;
 437                         }
 438                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 439                         /* no previous value and not saved */
 440                         continue;
 441                 conf_unsaved++;
 442                 /* maybe print value in verbose mode... */
 443         }
 444
 445         for_all_symbols(i, sym) {
 446                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 447                         /* Reset values of generates values, so they'll appear
 448                          * as new, if they should become visible, but that
 449                          * doesn't quite work if the Kconfig and the saved
 450                          * configuration disagree.
 451                          */
 452                         if (sym->visible == no && !conf_unsaved)
 453                                 sym->flags &= ~SYMBOL_DEF_USER;
 454                         switch (sym->type) {
 455                         case S_STRING:
 456                         case S_INT:
 457                         case S_HEX:
 458                                 /* Reset a string value if it's out of range */
 459                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
 460                                         break;
 461                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
 462                                 conf_unsaved++;
 463                                 break;
 464                         default:
 465                                 break;
 466                         }
 467                 }
 468         }
 469
 470         sym_add_change_count(conf_warnings || conf_unsaved);
 471
 472         return 0;
 473 }
 474
 475 /*
 476  * Kconfig configuration printer
 477  *
 478  * This printer is used when generating the resulting configuration after
 479  * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
 480  * passing a non-NULL argument to the printer.
 481  *
 482  */
 483 static void
 484 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 485 {
 486
 487         switch (sym->type) {
 488         case S_BOOLEAN:
 489         case S_TRISTATE:
 490                 if (*value == 'n') {
 491                         bool skip_unset = (arg != NULL);
 492
 493                         if (!skip_unset)
 494                                 fprintf(fp, "# %s%s is not set\n",
 495                                     CONFIG_, sym->name);
 496                         return;
 497                 }
 498                 break;
 499         default:
 500                 break;
 501         }
 502
 503         fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
 504 }
 505
 506 static void
 507 kconfig_print_comment(FILE *fp, const char *value, void *arg)
 508 {
 509         const char *p = value;
 510         size_t l;
 511
 512         for (;;) {
 513                 l = strcspn(p, "\n");
 514                 fprintf(fp, "#");
 515                 if (l) {
 516                         fprintf(fp, " ");
 517                         xfwrite(p, l, 1, fp);
 518                         p += l;
 519                 }
 520                 fprintf(fp, "\n");
 521                 if (*p++ == '\0')
 522                         break;
 523         }
 524 }
 525
 526 static struct conf_printer kconfig_printer_cb =
 527 {
 528         .print_symbol = kconfig_print_symbol,
 529         .print_comment = kconfig_print_comment,
 530 };
 531
 532 /*
 533  * Header printer
 534  *
 535  * This printer is used when generating the `include/generated/autoconf.h' file.
 536  */
 537 static void
 538 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 539 {
 540
 541         switch (sym->type) {
 542         case S_BOOLEAN:
 543         case S_TRISTATE: {
 544                 const char *suffix = "";
 545
 546                 switch (*value) {
 547                 case 'n':
 548                         break;
 549                 case 'm':
 550                         suffix = "_MODULE";
 551                         /* fall through */
 552                 default:
 553                         fprintf(fp, "#define %s%s%s 1\n",
 554                             CONFIG_, sym->name, suffix);
 555                 }
 556                 break;
 557         }
 558         case S_HEX: {
 559                 const char *prefix = "";
 560
 561                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
 562                         prefix = "0x";
 563                 fprintf(fp, "#define %s%s %s%s\n",
 564                     CONFIG_, sym->name, prefix, value);
 565                 break;
 566         }
 567         case S_STRING:
 568         case S_INT:
 569                 fprintf(fp, "#define %s%s %s\n",
 570                     CONFIG_, sym->name, value);
 571                 break;
 572         default:
 573                 break;
 574         }
 575
 576 }
 577
 578 static void
 579 header_print_comment(FILE *fp, const char *value, void *arg)
 580 {
 581         const char *p = value;
 582         size_t l;
 583
 584         fprintf(fp, "/*\n");
 585         for (;;) {
 586                 l = strcspn(p, "\n");
 587                 fprintf(fp, " *");
 588                 if (l) {
 589                         fprintf(fp, " ");
 590                         xfwrite(p, l, 1, fp);
 591                         p += l;
 592                 }
 593                 fprintf(fp, "\n");
 594                 if (*p++ == '\0')
 595                         break;
 596         }
 597         fprintf(fp, " */\n");
 598 }
 599
 600 static struct conf_printer header_printer_cb =
 601 {
 602         .print_symbol = header_print_symbol,
 603         .print_comment = header_print_comment,
 604 };
 605
 606 /*
 607  * Tristate printer
 608  *
 609  * This printer is used when generating the `include/config/tristate.conf' file.
 610  */
 611 static void
 612 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
 613 {
 614
 615         if (sym->type == S_TRISTATE && *value != 'n')
 616                 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
 617 }
 618
 619 static struct conf_printer tristate_printer_cb =
 620 {
 621         .print_symbol = tristate_print_symbol,
 622         .print_comment = kconfig_print_comment,
 623 };
 624
 625 static void conf_write_symbol(FILE *fp, struct symbol *sym,
 626                               struct conf_printer *printer, void *printer_arg)
 627 {
 628         const char *str;
 629         char *str2;
 630
 631         switch (sym->type) {
 632         case S_OTHER:
 633         case S_UNKNOWN:
 634                 break;
 635         case S_STRING:
 636                 str = sym_get_string_value(sym);
 637                 str2 = xmalloc(strlen(str) + 3);
 638                 sprintf(str2, "\"%s\"", str);
 639                 printer->print_symbol(fp, sym, str2, printer_arg);
 640                 free((void *)str2);
 641                 break;
 642         default:
 643                 str = sym_get_string_value(sym);
 644                 printer->print_symbol(fp, sym, str, printer_arg);
 645         }
 646 }
 647
 648 static void
 649 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
 650 {
 651         char buf[256];
 652
 653         snprintf(buf, sizeof(buf),
 654             "\n"
 655             "Automatically generated file; DO NOT EDIT.\n"
 656             "%s\n",
 657             rootmenu.prompt->text);
 658
 659         printer->print_comment(fp, buf, printer_arg);
 660 }
 661
 662 /*
 663  * Write out a minimal config.
 664  * All values that has default values are skipped as this is redundant.
 665  */
 666 int conf_write_defconfig(const char *filename)
 667 {
 668         struct symbol *sym;
 669         struct menu *menu;
 670         FILE *out;
 671
 672         out = fopen(filename, "w");
 673         if (!out)
 674                 return 1;
 675
 676         sym_clear_all_valid();
 677
 678         /* Traverse all menus to find all relevant symbols */
 679         menu = rootmenu.list;
 680
 681         while (menu != NULL)
 682         {
 683                 sym = menu->sym;
 684                 if (sym == NULL) {
 685                         if (!menu_is_visible(menu))
 686                                 goto next_menu;
 687                 } else if (!sym_is_choice(sym)) {
 688                         sym_calc_value(sym);
 689                         if (!(sym->flags & SYMBOL_WRITE))
 690                                 goto next_menu;
 691                         sym->flags &= ~SYMBOL_WRITE;
 692                         /* If we cannot change the symbol - skip */
 693                         if (!sym_is_changable(sym))
 694                                 goto next_menu;
 695                         /* If symbol equals to default value - skip */
 696                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
 697                                 goto next_menu;
 698
 699                         /*
 700                          * If symbol is a choice value and equals to the
 701                          * default for a choice - skip.
 702                          * But only if value is bool and equal to "y" and
 703                          * choice is not "optional".
 704                          * (If choice is "optional" then all values can be "n")
 705                          */
 706                         if (sym_is_choice_value(sym)) {
 707                                 struct symbol *cs;
 708                                 struct symbol *ds;
 709
 710                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
 711                                 ds = sym_choice_default(cs);
 712                                 if (!sym_is_optional(cs) && sym == ds) {
 713                                         if ((sym->type == S_BOOLEAN) &&
 714                                             sym_get_tristate_value(sym) == yes)
 715                                                 goto next_menu;
 716                                 }
 717                         }
 718                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 719                 }
 720 next_menu:
 721                 if (menu->list != NULL) {
 722                         menu = menu->list;
 723                 }
 724                 else if (menu->next != NULL) {
 725                         menu = menu->next;
 726                 } else {
 727                         while ((menu = menu->parent)) {
 728                                 if (menu->next != NULL) {
 729                                         menu = menu->next;
 730                                         break;
 731                                 }
 732                         }
 733                 }
 734         }
 735         fclose(out);
 736         return 0;
 737 }
 738
 739 int conf_write(const char *name)
 740 {
 741         FILE *out;
 742         struct symbol *sym;
 743         struct menu *menu;
 744         const char *basename;
 745         const char *str;
 746         char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
 747         char *env;
 748
 749         dirname[0] = 0;
 750         if (name && name[0]) {
 751                 struct stat st;
 752                 char *slash;
 753
 754                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 755                         strcpy(dirname, name);
 756                         strcat(dirname, "/");
 757                         basename = conf_get_configname();
 758                 } else if ((slash = strrchr(name, '/'))) {
 759                         int size = slash - name + 1;
 760                         memcpy(dirname, name, size);
 761                         dirname[size] = 0;
 762                         if (slash[1])
 763                                 basename = slash + 1;
 764                         else
 765                                 basename = conf_get_configname();
 766                 } else
 767                         basename = name;
 768         } else
 769                 basename = conf_get_configname();
 770
 771         sprintf(newname, "%s%s", dirname, basename);
 772         env = getenv("KCONFIG_OVERWRITECONFIG");
 773         if (!env || !*env) {
 774                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
 775                 out = fopen(tmpname, "w");
 776         } else {
 777                 *tmpname = 0;
 778                 out = fopen(newname, "w");
 779         }
 780         if (!out)
 781                 return 1;
 782
 783         conf_write_heading(out, &kconfig_printer_cb, NULL);
 784
 785         if (!conf_get_changed())
 786                 sym_clear_all_valid();
 787
 788         menu = rootmenu.list;
 789         while (menu) {
 790                 sym = menu->sym;
 791                 if (!sym) {
 792                         if (!menu_is_visible(menu))
 793                                 goto next;
 794                         str = menu_get_prompt(menu);
 795                         fprintf(out, "\n"
 796                                      "#\n"
 797                                      "# %s\n"
 798                                      "#\n", str);
 799                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 800                         sym_calc_value(sym);
 801                         if (!(sym->flags & SYMBOL_WRITE))
 802                                 goto next;
 803                         sym->flags &= ~SYMBOL_WRITE;
 804
 805                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 806                 }
 807
 808 next:
 809                 if (menu->list) {
 810                         menu = menu->list;
 811                         continue;
 812                 }
 813                 if (menu->next)
 814                         menu = menu->next;
 815                 else while ((menu = menu->parent)) {
 816                         if (menu->next) {
 817                                 menu = menu->next;
 818                                 break;
 819                         }
 820                 }
 821         }
 822         fclose(out);
 823
 824         if (*tmpname) {
 825                 strcat(dirname, basename);
 826                 strcat(dirname, ".old");
 827                 rename(newname, dirname);
 828                 if (rename(tmpname, newname))
 829                         return 1;
 830         }
 831
 832         conf_message(_("configuration written to %s"), newname);
 833
 834         sym_set_change_count(0);
 835
 836         return 0;
 837 }
 838
 839 static int conf_split_config(void)
 840 {
 841         const char *name;
 842         char path[PATH_MAX+1];
 843         char *s, *d, c;
 844         struct symbol *sym;
 845         struct stat sb;
 846         int res, i, fd;
 847
 848         name = conf_get_autoconfig_name();
 849         conf_read_simple(name, S_DEF_AUTO);
 850
 851         if (chdir("include/config"))
 852                 return 1;
 853
 854         res = 0;
 855         for_all_symbols(i, sym) {
 856                 sym_calc_value(sym);
 857                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 858                         continue;
 859                 if (sym->flags & SYMBOL_WRITE) {
 860                         if (sym->flags & SYMBOL_DEF_AUTO) {
 861                                 /*
 862                                  * symbol has old and new value,
 863                                  * so compare them...
 864                                  */
 865                                 switch (sym->type) {
 866                                 case S_BOOLEAN:
 867                                 case S_TRISTATE:
 868                                         if (sym_get_tristate_value(sym) ==
 869                                             sym->def[S_DEF_AUTO].tri)
 870                                                 continue;
 871                                         break;
 872                                 case S_STRING:
 873                                 case S_HEX:
 874                                 case S_INT:
 875                                         if (!strcmp(sym_get_string_value(sym),
 876                                                     sym->def[S_DEF_AUTO].val))
 877                                                 continue;
 878                                         break;
 879                                 default:
 880                                         break;
 881                                 }
 882                         } else {
 883                                 /*
 884                                  * If there is no old value, only 'no' (unset)
 885                                  * is allowed as new value.
 886                                  */
 887                                 switch (sym->type) {
 888                                 case S_BOOLEAN:
 889                                 case S_TRISTATE:
 890                                         if (sym_get_tristate_value(sym) == no)
 891                                                 continue;
 892                                         break;
 893                                 default:
 894                                         break;
 895                                 }
 896                         }
 897                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 898                         /* There is neither an old nor a new value. */
 899                         continue;
 900                 /* else
 901                  *      There is an old value, but no new value ('no' (unset)
 902                  *      isn't saved in auto.conf, so the old value is always
 903                  *      different from 'no').
 904                  */
 905
 906                 /* Replace all '_' and append ".h" */
 907                 s = sym->name;
 908                 d = path;
 909                 while ((c = *s++)) {
 910                         c = tolower(c);
 911                         *d++ = (c == '_') ? '/' : c;
 912                 }
 913                 strcpy(d, ".h");
 914
 915                 /* Assume directory path already exists. */
 916                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 917                 if (fd == -1) {
 918                         if (errno != ENOENT) {
 919                                 res = 1;
 920                                 break;
 921                         }
 922                         /*
 923                          * Create directory components,
 924                          * unless they exist already.
 925                          */
 926                         d = path;
 927                         while ((d = strchr(d, '/'))) {
 928                                 *d = 0;
 929                                 if (stat(path, &sb) && mkdir(path, 0755)) {
 930                                         res = 1;
 931                                         goto out;
 932                                 }
 933                                 *d++ = '/';
 934                         }
 935                         /* Try it again. */
 936                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 937                         if (fd == -1) {
 938                                 res = 1;
 939                                 break;
 940                         }
 941                 }
 942                 close(fd);
 943         }
 944 out:
 945         if (chdir("../.."))
 946                 return 1;
 947
 948         return res;
 949 }
 950
 951 int conf_write_autoconf(void)
 952 {
 953         struct symbol *sym;
 954         const char *name;
 955         FILE *out, *tristate, *out_h;
 956         int i;
 957
 958         sym_clear_all_valid();
 959
 960         file_write_dep("include/config/auto.conf.cmd");
 961
 962         if (conf_split_config())
 963                 return 1;
 964
 965         out = fopen(".tmpconfig", "w");
 966         if (!out)
 967                 return 1;
 968
 969         tristate = fopen(".tmpconfig_tristate", "w");
 970         if (!tristate) {
 971                 fclose(out);
 972                 return 1;
 973         }
 974
 975         out_h = fopen(".tmpconfig.h", "w");
 976         if (!out_h) {
 977                 fclose(out);
 978                 fclose(tristate);
 979                 return 1;
 980         }
 981
 982         conf_write_heading(out, &kconfig_printer_cb, NULL);
 983
 984         conf_write_heading(tristate, &tristate_printer_cb, NULL);
 985
 986         conf_write_heading(out_h, &header_printer_cb, NULL);
 987
 988         for_all_symbols(i, sym) {
 989                 sym_calc_value(sym);
 990                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 991                         continue;
 992
 993                 /* write symbol to auto.conf, tristate and header files */
 994                 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
 995
 996                 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
 997
 998                 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
 999         }
1000         fclose(out);
1001         fclose(tristate);
1002         fclose(out_h);
1003
1004         name = getenv("KCONFIG_AUTOHEADER");
1005         if (!name)
1006                 name = "include/generated/autoconf.h";
1007         if (rename(".tmpconfig.h", name))
1008                 return 1;
1009         name = getenv("KCONFIG_TRISTATE");
1010         if (!name)
1011                 name = "include/config/tristate.conf";
1012         if (rename(".tmpconfig_tristate", name))
1013                 return 1;
1014         name = conf_get_autoconfig_name();
1015         /*
1016          * This must be the last step, kbuild has a dependency on auto.conf
1017          * and this marks the successful completion of the previous steps.
1018          */
1019         if (rename(".tmpconfig", name))
1020                 return 1;
1021
1022         return 0;
1023 }
1024
1025 static int sym_change_count;
1026 static void (*conf_changed_callback)(void);
1027
1028 void sym_set_change_count(int count)
1029 {
1030         int _sym_change_count = sym_change_count;
1031         sym_change_count = count;
1032         if (conf_changed_callback &&
1033             (bool)_sym_change_count != (bool)count)
1034                 conf_changed_callback();
1035 }
1036
1037 void sym_add_change_count(int count)
1038 {
1039         sym_set_change_count(count + sym_change_count);
1040 }
1041
1042 bool conf_get_changed(void)
1043 {
1044         return sym_change_count;
1045 }
1046
1047 void conf_set_changed_callback(void (*fn)(void))
1048 {
1049         conf_changed_callback = fn;
1050 }
1051
1052 static bool randomize_choice_values(struct symbol *csym)
1053 {
1054         struct property *prop;
1055         struct symbol *sym;
1056         struct expr *e;
1057         int cnt, def;
1058
1059         /*
1060          * If choice is mod then we may have more items selected
1061          * and if no then no-one.
1062          * In both cases stop.
1063          */
1064         if (csym->curr.tri != yes)
1065                 return false;
1066
1067         prop = sym_get_choice_prop(csym);
1068
1069         /* count entries in choice block */
1070         cnt = 0;
1071         expr_list_for_each_sym(prop->expr, e, sym)
1072                 cnt++;
1073
1074         /*
1075          * find a random value and set it to yes,
1076          * set the rest to no so we have only one set
1077          */
1078         def = (rand() % cnt);
1079
1080         cnt = 0;
1081         expr_list_for_each_sym(prop->expr, e, sym) {
1082                 if (def == cnt++) {
1083                         sym->def[S_DEF_USER].tri = yes;
1084                         csym->def[S_DEF_USER].val = sym;
1085                 }
1086                 else {
1087                         sym->def[S_DEF_USER].tri = no;
1088                 }
1089                 sym->flags |= SYMBOL_DEF_USER;
1090                 /* clear VALID to get value calculated */
1091                 sym->flags &= ~SYMBOL_VALID;
1092         }
1093         csym->flags |= SYMBOL_DEF_USER;
1094         /* clear VALID to get value calculated */
1095         csym->flags &= ~(SYMBOL_VALID);
1096
1097         return true;
1098 }
1099
1100 void set_all_choice_values(struct symbol *csym)
1101 {
1102         struct property *prop;
1103         struct symbol *sym;
1104         struct expr *e;
1105
1106         prop = sym_get_choice_prop(csym);
1107
1108         /*
1109          * Set all non-assinged choice values to no
1110          */
1111         expr_list_for_each_sym(prop->expr, e, sym) {
1112                 if (!sym_has_value(sym))
1113                         sym->def[S_DEF_USER].tri = no;
1114         }
1115         csym->flags |= SYMBOL_DEF_USER;
1116         /* clear VALID to get value calculated */
1117         csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1118 }
1119
1120 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1121 {
1122         struct symbol *sym, *csym;
1123         int i, cnt, pby, pty, ptm;      /* pby: probability of boolean  = y
1124                                          * pty: probability of tristate = y
1125                                          * ptm: probability of tristate = m
1126                                          */
1127
1128         pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1129                                    * below, otherwise gcc whines about
1130                                    * -Wmaybe-uninitialized */
1131         if (mode == def_random) {
1132                 int n, p[3];
1133                 char *env = getenv("KCONFIG_PROBABILITY");
1134                 n = 0;
1135                 while( env && *env ) {
1136                         char *endp;
1137                         int tmp = strtol( env, &endp, 10 );
1138                         if( tmp >= 0 && tmp <= 100 ) {
1139                                 p[n++] = tmp;
1140                         } else {
1141                                 errno = ERANGE;
1142                                 perror( "KCONFIG_PROBABILITY" );
1143                                 exit( 1 );
1144                         }
1145                         env = (*endp == ':') ? endp+1 : endp;
1146                         if( n >=3 ) {
1147                                 break;
1148                         }
1149                 }
1150                 switch( n ) {
1151                 case 1:
1152                         pby = p[0]; ptm = pby/2; pty = pby-ptm;
1153                         break;
1154                 case 2:
1155                         pty = p[0]; ptm = p[1]; pby = pty + ptm;
1156                         break;
1157                 case 3:
1158                         pby = p[0]; pty = p[1]; ptm = p[2];
1159                         break;
1160                 }
1161
1162                 if( pty+ptm > 100 ) {
1163                         errno = ERANGE;
1164                         perror( "KCONFIG_PROBABILITY" );
1165                         exit( 1 );
1166                 }
1167         }
1168         bool has_changed = false;
1169
1170         for_all_symbols(i, sym) {
1171                 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1172                         continue;
1173                 switch (sym_get_type(sym)) {
1174                 case S_BOOLEAN:
1175                 case S_TRISTATE:
1176                         has_changed = true;
1177                         switch (mode) {
1178                         case def_yes:
1179                                 sym->def[S_DEF_USER].tri = yes;
1180                                 break;
1181                         case def_mod:
1182                                 sym->def[S_DEF_USER].tri = mod;
1183                                 break;
1184                         case def_no:
1185                                 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1186                                         sym->def[S_DEF_USER].tri = yes;
1187                                 else
1188                                         sym->def[S_DEF_USER].tri = no;
1189                                 break;
1190                         case def_random:
1191                                 sym->def[S_DEF_USER].tri = no;
1192                                 cnt = rand() % 100;
1193                                 if (sym->type == S_TRISTATE) {
1194                                         if (cnt < pty)
1195                                                 sym->def[S_DEF_USER].tri = yes;
1196                                         else if (cnt < (pty+ptm))
1197                                                 sym->def[S_DEF_USER].tri = mod;
1198                                 } else if (cnt < pby)
1199                                         sym->def[S_DEF_USER].tri = yes;
1200                                 break;
1201                         default:
1202                                 continue;
1203                         }
1204                         if (!(sym_is_choice(sym) && mode == def_random))
1205                                 sym->flags |= SYMBOL_DEF_USER;
1206                         break;
1207                 default:
1208                         break;
1209                 }
1210
1211         }
1212
1213         sym_clear_all_valid();
1214
1215         /*
1216          * We have different type of choice blocks.
1217          * If curr.tri equals to mod then we can select several
1218          * choice symbols in one block.
1219          * In this case we do nothing.
1220          * If curr.tri equals yes then only one symbol can be
1221          * selected in a choice block and we set it to yes,
1222          * and the rest to no.
1223          */
1224         if (mode != def_random) {
1225                 for_all_symbols(i, csym) {
1226                         if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1227                             sym_is_choice_value(csym))
1228                                 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1229                 }
1230         }
1231
1232         for_all_symbols(i, csym) {
1233                 if (sym_has_value(csym) || !sym_is_choice(csym))
1234                         continue;
1235
1236                 sym_calc_value(csym);
1237                 if (mode == def_random)
1238                         has_changed = randomize_choice_values(csym);
1239                 else {
1240                         set_all_choice_values(csym);
1241                         has_changed = true;
1242                 }
1243         }
1244
1245         return has_changed;
1246 }