uboot/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
  19struct conf_printer {
  20        void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
  21        void (*print_comment)(FILE *, const char *, void *);
  22};
  23
  24static void conf_warning(const char *fmt, ...)
  25        __attribute__ ((format (printf, 1, 2)));
  26
  27static void conf_message(const char *fmt, ...)
  28        __attribute__ ((format (printf, 1, 2)));
  29
  30static const char *conf_filename;
  31static int conf_lineno, conf_warnings, conf_unsaved;
  32
  33const char conf_defname[] = "arch/$ARCH/defconfig";
  34
  35static void conf_warning(const char *fmt, ...)
  36{
  37        va_list ap;
  38        va_start(ap, fmt);
  39        fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  40        vfprintf(stderr, fmt, ap);
  41        fprintf(stderr, "\n");
  42        va_end(ap);
  43        conf_warnings++;
  44}
  45
  46static void conf_default_message_callback(const char *fmt, va_list ap)
  47{
  48        printf("#\n# ");
  49        vprintf(fmt, ap);
  50        printf("\n#\n");
  51}
  52
  53static void (*conf_message_callback) (const char *fmt, va_list ap) =
  54        conf_default_message_callback;
  55void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
  56{
  57        conf_message_callback = fn;
  58}
  59
  60static void conf_message(const char *fmt, ...)
  61{
  62        va_list ap;
  63
  64        va_start(ap, fmt);
  65        if (conf_message_callback)
  66                conf_message_callback(fmt, ap);
  67        va_end(ap);
  68}
  69
  70const char *conf_get_configname(void)
  71{
  72        char *name = getenv("KCONFIG_CONFIG");
  73
  74        return name ? name : ".config";
  75}
  76
  77const char *conf_get_autoconfig_name(void)
  78{
  79        char *name = getenv("KCONFIG_AUTOCONFIG");
  80
  81        return name ? name : "include/config/auto.conf";
  82}
  83
  84static char *conf_expand_value(const char *in)
  85{
  86        struct symbol *sym;
  87        const char *src;
  88        static char res_value[SYMBOL_MAXLENGTH];
  89        char *dst, name[SYMBOL_MAXLENGTH];
  90
  91        res_value[0] = 0;
  92        dst = name;
  93        while ((src = strchr(in, '$'))) {
  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
 110char *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
 126static 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
 193static 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
 213static 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
 241e_out:
 242        line[slen-1] = '\0';
 243        *lineptr = line;
 244        return -1;
 245}
 246
 247int 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                        return 1;
 268
 269                for_all_defaults(sym_defconfig_list, prop) {
 270                        if (expr_calc_value(prop->visible.expr) == no ||
 271                            prop->expr->type != E_SYMBOL)
 272                                continue;
 273                        name = conf_expand_value(prop->expr->left.sym->name);
 274                        in = zconf_fopen(name);
 275                        if (in) {
 276                                conf_message(_("using defaults found in %s"),
 277                                         name);
 278                                goto load;
 279                        }
 280                }
 281        }
 282        if (!in)
 283                return 1;
 284
 285load:
 286        conf_filename = name;
 287        conf_lineno = 0;
 288        conf_warnings = 0;
 289        conf_unsaved = 0;
 290
 291        def_flags = SYMBOL_DEF << def;
 292        for_all_symbols(i, sym) {
 293                sym->flags |= SYMBOL_CHANGED;
 294                sym->flags &= ~(def_flags|SYMBOL_VALID);
 295                if (sym_is_choice(sym))
 296                        sym->flags |= def_flags;
 297                switch (sym->type) {
 298                case S_INT:
 299                case S_HEX:
 300                case S_STRING:
 301                        if (sym->def[def].val)
 302                                free(sym->def[def].val);
 303                        /* fall through */
 304                default:
 305                        sym->def[def].val = NULL;
 306                        sym->def[def].tri = no;
 307                }
 308        }
 309
 310        while (compat_getline(&line, &line_asize, in) != -1) {
 311                conf_lineno++;
 312                sym = NULL;
 313                if (line[0] == '#') {
 314                        if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
 315                                continue;
 316                        p = strchr(line + 2 + strlen(CONFIG_), ' ');
 317                        if (!p)
 318                                continue;
 319                        *p++ = 0;
 320                        if (strncmp(p, "is not set", 10))
 321                                continue;
 322                        if (def == S_DEF_USER) {
 323                                sym = sym_find(line + 2 + strlen(CONFIG_));
 324                                if (!sym) {
 325                                        sym_add_change_count(1);
 326                                        goto setsym;
 327                                }
 328                        } else {
 329                                sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
 330                                if (sym->type == S_UNKNOWN)
 331                                        sym->type = S_BOOLEAN;
 332                        }
 333                        if (sym->flags & def_flags) {
 334                                conf_warning("override: reassigning to symbol %s", sym->name);
 335                        }
 336                        switch (sym->type) {
 337                        case S_BOOLEAN:
 338                        case S_TRISTATE:
 339                                sym->def[def].tri = no;
 340                                sym->flags |= def_flags;
 341                                break;
 342                        default:
 343                                ;
 344                        }
 345                } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
 346                        p = strchr(line + strlen(CONFIG_), '=');
 347                        if (!p)
 348                                continue;
 349                        *p++ = 0;
 350                        p2 = strchr(p, '\n');
 351                        if (p2) {
 352                                *p2-- = 0;
 353                                if (*p2 == '\r')
 354                                        *p2 = 0;
 355                        }
 356                        if (def == S_DEF_USER) {
 357                                sym = sym_find(line + strlen(CONFIG_));
 358                                if (!sym) {
 359                                        sym_add_change_count(1);
 360                                        goto setsym;
 361                                }
 362                        } else {
 363                                sym = sym_lookup(line + strlen(CONFIG_), 0);
 364                                if (sym->type == S_UNKNOWN)
 365                                        sym->type = S_OTHER;
 366                        }
 367                        if (sym->flags & def_flags) {
 368                                conf_warning("override: reassigning to symbol %s", sym->name);
 369                        }
 370                        if (conf_set_sym_val(sym, def, def_flags, p))
 371                                continue;
 372                } else {
 373                        if (line[0] != '\r' && line[0] != '\n')
 374                                conf_warning("unexpected data: %.*s",
 375                                             (int)strcspn(line, "\r\n"), line);
 376
 377                        continue;
 378                }
 379setsym:
 380                if (sym && sym_is_choice_value(sym)) {
 381                        struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 382                        switch (sym->def[def].tri) {
 383                        case no:
 384                                break;
 385                        case mod:
 386                                if (cs->def[def].tri == yes) {
 387                                        conf_warning("%s creates inconsistent choice state", sym->name);
 388                                        cs->flags &= ~def_flags;
 389                                }
 390                                break;
 391                        case yes:
 392                                if (cs->def[def].tri != no)
 393                                        conf_warning("override: %s changes choice state", sym->name);
 394                                cs->def[def].val = sym;
 395                                break;
 396                        }
 397                        cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
 398                }
 399        }
 400        free(line);
 401        fclose(in);
 402        return 0;
 403}
 404
 405int conf_read(const char *name)
 406{
 407        struct symbol *sym;
 408        int i;
 409
 410        sym_set_change_count(0);
 411
 412        if (conf_read_simple(name, S_DEF_USER)) {
 413                sym_calc_value(modules_sym);
 414                return 1;
 415        }
 416
 417        sym_calc_value(modules_sym);
 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 */
 483static void
 484kconfig_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
 506static void
 507kconfig_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
 526static 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 */
 537static void
 538header_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
 578static void
 579header_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
 600static 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 */
 611static void
 612tristate_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
 619static struct conf_printer tristate_printer_cb =
 620{
 621        .print_symbol = tristate_print_symbol,
 622        .print_comment = kconfig_print_comment,
 623};
 624
 625static 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
 648static void
 649conf_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 */
 666int 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                }
 720next_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
 739int 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
 808next:
 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
 839static 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        sym_calc_value(modules_sym);
 851
 852        if (chdir("include/config"))
 853                return 1;
 854
 855        res = 0;
 856        for_all_symbols(i, sym) {
 857                sym_calc_value(sym);
 858                if ((sym->flags & SYMBOL_AUTO) || !sym->name)
 859                        continue;
 860                if (sym->flags & SYMBOL_WRITE) {
 861                        if (sym->flags & SYMBOL_DEF_AUTO) {
 862                                /*
 863                                 * symbol has old and new value,
 864                                 * so compare them...
 865                                 */
 866                                switch (sym->type) {
 867                                case S_BOOLEAN:
 868                                case S_TRISTATE:
 869                                        if (sym_get_tristate_value(sym) ==
 870                                            sym->def[S_DEF_AUTO].tri)
 871                                                continue;
 872                                        break;
 873                                case S_STRING:
 874                                case S_HEX:
 875                                case S_INT:
 876                                        if (!strcmp(sym_get_string_value(sym),
 877                                                    sym->def[S_DEF_AUTO].val))
 878                                                continue;
 879                                        break;
 880                                default:
 881                                        break;
 882                                }
 883                        } else {
 884                                /*
 885                                 * If there is no old value, only 'no' (unset)
 886                                 * is allowed as new value.
 887                                 */
 888                                switch (sym->type) {
 889                                case S_BOOLEAN:
 890                                case S_TRISTATE:
 891                                        if (sym_get_tristate_value(sym) == no)
 892                                                continue;
 893                                        break;
 894                                default:
 895                                        break;
 896                                }
 897                        }
 898                } else if (!(sym->flags & SYMBOL_DEF_AUTO))
 899                        /* There is neither an old nor a new value. */
 900                        continue;
 901                /* else
 902                 *      There is an old value, but no new value ('no' (unset)
 903                 *      isn't saved in auto.conf, so the old value is always
 904                 *      different from 'no').
 905                 */
 906
 907                /* Replace all '_' and append ".h" */
 908                s = sym->name;
 909                d = path;
 910                while ((c = *s++)) {
 911                        c = tolower(c);
 912                        *d++ = (c == '_') ? '/' : c;
 913                }
 914                strcpy(d, ".h");
 915
 916                /* Assume directory path already exists. */
 917                fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 918                if (fd == -1) {
 919                        if (errno != ENOENT) {
 920                                res = 1;
 921                                break;
 922                        }
 923                        /*
 924                         * Create directory components,
 925                         * unless they exist already.
 926                         */
 927                        d = path;
 928                        while ((d = strchr(d, '/'))) {
 929                                *d = 0;
 930                                if (stat(path, &sb) && mkdir(path, 0755)) {
 931                                        res = 1;
 932                                        goto out;
 933                                }
 934                                *d++ = '/';
 935                        }
 936                        /* Try it again. */
 937                        fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 938                        if (fd == -1) {
 939                                res = 1;
 940                                break;
 941                        }
 942                }
 943                close(fd);
 944        }
 945out:
 946        if (chdir("../.."))
 947                return 1;
 948
 949        return res;
 950}
 951
 952int conf_write_autoconf(void)
 953{
 954        struct symbol *sym;
 955        const char *name;
 956        FILE *out, *tristate, *out_h;
 957        int i;
 958
 959        sym_clear_all_valid();
 960
 961        file_write_dep("include/config/auto.conf.cmd");
 962
 963        if (conf_split_config())
 964                return 1;
 965
 966        out = fopen(".tmpconfig", "w");
 967        if (!out)
 968                return 1;
 969
 970        tristate = fopen(".tmpconfig_tristate", "w");
 971        if (!tristate) {
 972                fclose(out);
 973                return 1;
 974        }
 975
 976        out_h = fopen(".tmpconfig.h", "w");
 977        if (!out_h) {
 978                fclose(out);
 979                fclose(tristate);
 980                return 1;
 981        }
 982
 983        conf_write_heading(out, &kconfig_printer_cb, NULL);
 984
 985        conf_write_heading(tristate, &tristate_printer_cb, NULL);
 986
 987        conf_write_heading(out_h, &header_printer_cb, NULL);
 988
 989        for_all_symbols(i, sym) {
 990                sym_calc_value(sym);
 991                if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 992                        continue;
 993
 994                /* write symbol to auto.conf, tristate and header files */
 995                conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
 996
 997                conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
 998
 999                conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1000        }
1001        fclose(out);
1002        fclose(tristate);
1003        fclose(out_h);
1004
1005        name = getenv("KCONFIG_AUTOHEADER");
1006        if (!name)
1007                name = "include/generated/autoconf.h";
1008        if (rename(".tmpconfig.h", name))
1009                return 1;
1010        name = getenv("KCONFIG_TRISTATE");
1011        if (!name)
1012                name = "include/config/tristate.conf";
1013        if (rename(".tmpconfig_tristate", name))
1014                return 1;
1015        name = conf_get_autoconfig_name();
1016        /*
1017         * This must be the last step, kbuild has a dependency on auto.conf
1018         * and this marks the successful completion of the previous steps.
1019         */
1020        if (rename(".tmpconfig", name))
1021                return 1;
1022
1023        return 0;
1024}
1025
1026static int sym_change_count;
1027static void (*conf_changed_callback)(void);
1028
1029void sym_set_change_count(int count)
1030{
1031        int _sym_change_count = sym_change_count;
1032        sym_change_count = count;
1033        if (conf_changed_callback &&
1034            (bool)_sym_change_count != (bool)count)
1035                conf_changed_callback();
1036}
1037
1038void sym_add_change_count(int count)
1039{
1040        sym_set_change_count(count + sym_change_count);
1041}
1042
1043bool conf_get_changed(void)
1044{
1045        return sym_change_count;
1046}
1047
1048void conf_set_changed_callback(void (*fn)(void))
1049{
1050        conf_changed_callback = fn;
1051}
1052
1053static bool randomize_choice_values(struct symbol *csym)
1054{
1055        struct property *prop;
1056        struct symbol *sym;
1057        struct expr *e;
1058        int cnt, def;
1059
1060        /*
1061         * If choice is mod then we may have more items selected
1062         * and if no then no-one.
1063         * In both cases stop.
1064         */
1065        if (csym->curr.tri != yes)
1066                return false;
1067
1068        prop = sym_get_choice_prop(csym);
1069
1070        /* count entries in choice block */
1071        cnt = 0;
1072        expr_list_for_each_sym(prop->expr, e, sym)
1073                cnt++;
1074
1075        /*
1076         * find a random value and set it to yes,
1077         * set the rest to no so we have only one set
1078         */
1079        def = (rand() % cnt);
1080
1081        cnt = 0;
1082        expr_list_for_each_sym(prop->expr, e, sym) {
1083                if (def == cnt++) {
1084                        sym->def[S_DEF_USER].tri = yes;
1085                        csym->def[S_DEF_USER].val = sym;
1086                }
1087                else {
1088                        sym->def[S_DEF_USER].tri = no;
1089                }
1090                sym->flags |= SYMBOL_DEF_USER;
1091                /* clear VALID to get value calculated */
1092                sym->flags &= ~SYMBOL_VALID;
1093        }
1094        csym->flags |= SYMBOL_DEF_USER;
1095        /* clear VALID to get value calculated */
1096        csym->flags &= ~(SYMBOL_VALID);
1097
1098        return true;
1099}
1100
1101void set_all_choice_values(struct symbol *csym)
1102{
1103        struct property *prop;
1104        struct symbol *sym;
1105        struct expr *e;
1106
1107        prop = sym_get_choice_prop(csym);
1108
1109        /*
1110         * Set all non-assinged choice values to no
1111         */
1112        expr_list_for_each_sym(prop->expr, e, sym) {
1113                if (!sym_has_value(sym))
1114                        sym->def[S_DEF_USER].tri = no;
1115        }
1116        csym->flags |= SYMBOL_DEF_USER;
1117        /* clear VALID to get value calculated */
1118        csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1119}
1120
1121bool conf_set_all_new_symbols(enum conf_def_mode mode)
1122{
1123        struct symbol *sym, *csym;
1124        int i, cnt, pby, pty, ptm;      /* pby: probability of boolean  = y
1125                                         * pty: probability of tristate = y
1126                                         * ptm: probability of tristate = m
1127                                         */
1128
1129        pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1130                                   * below, otherwise gcc whines about
1131                                   * -Wmaybe-uninitialized */
1132        if (mode == def_random) {
1133                int n, p[3];
1134                char *env = getenv("KCONFIG_PROBABILITY");
1135                n = 0;
1136                while( env && *env ) {
1137                        char *endp;
1138                        int tmp = strtol( env, &endp, 10 );
1139                        if( tmp >= 0 && tmp <= 100 ) {
1140                                p[n++] = tmp;
1141                        } else {
1142                                errno = ERANGE;
1143                                perror( "KCONFIG_PROBABILITY" );
1144                                exit( 1 );
1145                        }
1146                        env = (*endp == ':') ? endp+1 : endp;
1147                        if( n >=3 ) {
1148                                break;
1149                        }
1150                }
1151                switch( n ) {
1152                case 1:
1153                        pby = p[0]; ptm = pby/2; pty = pby-ptm;
1154                        break;
1155                case 2:
1156                        pty = p[0]; ptm = p[1]; pby = pty + ptm;
1157                        break;
1158                case 3:
1159                        pby = p[0]; pty = p[1]; ptm = p[2];
1160                        break;
1161                }
1162
1163                if( pty+ptm > 100 ) {
1164                        errno = ERANGE;
1165                        perror( "KCONFIG_PROBABILITY" );
1166                        exit( 1 );
1167                }
1168        }
1169        bool has_changed = false;
1170
1171        for_all_symbols(i, sym) {
1172                if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1173                        continue;
1174                switch (sym_get_type(sym)) {
1175                case S_BOOLEAN:
1176                case S_TRISTATE:
1177                        has_changed = true;
1178                        switch (mode) {
1179                        case def_yes:
1180                                sym->def[S_DEF_USER].tri = yes;
1181                                break;
1182                        case def_mod:
1183                                sym->def[S_DEF_USER].tri = mod;
1184                                break;
1185                        case def_no:
1186                                if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1187                                        sym->def[S_DEF_USER].tri = yes;
1188                                else
1189                                        sym->def[S_DEF_USER].tri = no;
1190                                break;
1191                        case def_random:
1192                                sym->def[S_DEF_USER].tri = no;
1193                                cnt = rand() % 100;
1194                                if (sym->type == S_TRISTATE) {
1195                                        if (cnt < pty)
1196                                                sym->def[S_DEF_USER].tri = yes;
1197                                        else if (cnt < (pty+ptm))
1198                                                sym->def[S_DEF_USER].tri = mod;
1199                                } else if (cnt < pby)
1200                                        sym->def[S_DEF_USER].tri = yes;
1201                                break;
1202                        default:
1203                                continue;
1204                        }
1205                        if (!(sym_is_choice(sym) && mode == def_random))
1206                                sym->flags |= SYMBOL_DEF_USER;
1207                        break;
1208                default:
1209                        break;
1210                }
1211
1212        }
1213
1214        sym_clear_all_valid();
1215
1216        /*
1217         * We have different type of choice blocks.
1218         * If curr.tri equals to mod then we can select several
1219         * choice symbols in one block.
1220         * In this case we do nothing.
1221         * If curr.tri equals yes then only one symbol can be
1222         * selected in a choice block and we set it to yes,
1223         * and the rest to no.
1224         */
1225        if (mode != def_random) {
1226                for_all_symbols(i, csym) {
1227                        if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1228                            sym_is_choice_value(csym))
1229                                csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1230                }
1231        }
1232
1233        for_all_symbols(i, csym) {
1234                if (sym_has_value(csym) || !sym_is_choice(csym))
1235                        continue;
1236
1237                sym_calc_value(csym);
1238                if (mode == def_random)
1239                        has_changed = randomize_choice_values(csym);
1240                else {
1241                        set_all_choice_values(csym);
1242                        has_changed = true;
1243                }
1244        }
1245
1246        return has_changed;
1247}
1248