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