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 <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <time.h>
  12 #include <unistd.h>
  13
  14 #define LKC_DIRECT_LINK
  15 #include "lkc.h"
  16
  17 static void conf_warning(const char *fmt, ...)
  18         __attribute__ ((format (printf, 1, 2)));
  19
  20 static const char *conf_filename;
  21 static int conf_lineno, conf_warnings, conf_unsaved;
  22
  23 const char conf_def_filename[] = ".config";
  24
  25 const char conf_defname[] = "/dev/null"; //bbox
  26
  27 const char *conf_confnames[] = {
  28         conf_def_filename,
  29         conf_defname,
  30         NULL,
  31 };
  32
  33 static void conf_warning(const char *fmt, ...)
  34 {
  35         va_list ap;
  36         va_start(ap, fmt);
  37         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  38         vfprintf(stderr, fmt, ap);
  39         fprintf(stderr, "\n");
  40         va_end(ap);
  41         conf_warnings++;
  42 }
  43
  44 static char *conf_expand_value(const char *in)
  45 {
  46         struct symbol *sym;
  47         const char *src;
  48         static char res_value[SYMBOL_MAXLENGTH];
  49         char *dst, name[SYMBOL_MAXLENGTH];
  50
  51         res_value[0] = 0;
  52         dst = name;
  53         while ((src = strchr(in, '$'))) {
  54                 strncat(res_value, in, src - in);
  55                 src++;
  56                 dst = name;
  57                 while (isalnum(*src) || *src == '_')
  58                         *dst++ = *src++;
  59                 *dst = 0;
  60                 sym = sym_lookup(name, 0);
  61                 sym_calc_value(sym);
  62                 strcat(res_value, sym_get_string_value(sym));
  63                 in = src;
  64         }
  65         strcat(res_value, in);
  66
  67         return res_value;
  68 }
  69
  70 char *conf_get_default_confname(void)
  71 {
  72         struct stat buf;
  73         static char *fullname = NULL;
  74         char *env, *name;
  75
  76         name = conf_expand_value(conf_defname);
  77         env = getenv(SRCTREE);
  78         if (env) {
  79                 fullname = realloc(fullname, strlen(env) + strlen(name) + 2);
  80                 sprintf(fullname, "%s/%s", env, name);
  81                 if (!stat(fullname, &buf))
  82                         return fullname;
  83         }
  84         return name;
  85 }
  86
  87 int conf_read_simple(const char *name)
  88 {
  89         FILE *in = NULL;
  90         char line[1024];
  91         char *p, *p2;
  92         struct symbol *sym;
  93         int i;
  94
  95         if (name) {
  96                 in = zconf_fopen(name);
  97         } else {
  98                 const char **names = conf_confnames;
  99                 while ((name = *names++)) {
 100                         name = conf_expand_value(name);
 101                         in = zconf_fopen(name);
 102                         if (in) {
 103                                 printf(_("#\n"
 104                                          "# using defaults found in %s\n"
 105                                          "#\n"), name);
 106                                 break;
 107                         }
 108                 }
 109         }
 110         if (!in)
 111                 return 1;
 112
 113         conf_filename = name;
 114         conf_lineno = 0;
 115         conf_warnings = 0;
 116         conf_unsaved = 0;
 117
 118         for_all_symbols(i, sym) {
 119                 sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
 120                 if (sym_is_choice(sym))
 121                         sym->flags &= ~SYMBOL_NEW;
 122                 sym->flags &= ~SYMBOL_VALID;
 123                 switch (sym->type) {
 124                 case S_INT:
 125                 case S_HEX:
 126                 case S_STRING:
 127                         free(sym->user.val);
 128                 default:
 129                         sym->user.val = NULL;
 130                         sym->user.tri = no;
 131                 }
 132         }
 133
 134         while (fgets(line, sizeof(line), in)) {
 135                 conf_lineno++;
 136                 sym = NULL;
 137                 switch (line[0]) {
 138                 case '#':
 139                         if (memcmp(line + 2, "CONFIG_", 7))
 140                                 continue;
 141                         p = strchr(line + 9, ' ');
 142                         if (!p)
 143                                 continue;
 144                         *p++ = 0;
 145                         if (strncmp(p, "is not set", 10))
 146                                 continue;
 147                         sym = sym_find(line + 9);
 148                         if (!sym) {
 149                                 conf_warning("trying to assign nonexistent symbol %s", line + 9);
 150                                 break;
 151                         } else if (!(sym->flags & SYMBOL_NEW)) {
 152                                 conf_warning("trying to reassign symbol %s", sym->name);
 153                                 break;
 154                         }
 155                         switch (sym->type) {
 156                         case S_BOOLEAN:
 157                         case S_TRISTATE:
 158                                 sym->user.tri = no;
 159                                 sym->flags &= ~SYMBOL_NEW;
 160                                 break;
 161                         default:
 162                                 ;
 163                         }
 164                         break;
 165                 case 'C':
 166                         if (memcmp(line, "CONFIG_", 7)) {
 167                                 conf_warning("unexpected data");
 168                                 continue;
 169                         }
 170                         p = strchr(line + 7, '=');
 171                         if (!p)
 172                                 continue;
 173                         *p++ = 0;
 174                         p2 = strchr(p, '\n');
 175                         if (p2)
 176                                 *p2 = 0;
 177                         sym = sym_find(line + 7);
 178                         if (!sym) {
 179                                 conf_warning("trying to assign nonexistent symbol %s", line + 7);
 180                                 break;
 181                         } else if (!(sym->flags & SYMBOL_NEW)) {
 182                                 conf_warning("trying to reassign symbol %s", sym->name);
 183                                 break;
 184                         }
 185                         switch (sym->type) {
 186                         case S_TRISTATE:
 187                                 if (p[0] == 'm') {
 188                                         sym->user.tri = mod;
 189                                         sym->flags &= ~SYMBOL_NEW;
 190                                         break;
 191                                 }
 192                         case S_BOOLEAN:
 193                                 if (p[0] == 'y') {
 194                                         sym->user.tri = yes;
 195                                         sym->flags &= ~SYMBOL_NEW;
 196                                         break;
 197                                 }
 198                                 if (p[0] == 'n') {
 199                                         sym->user.tri = no;
 200                                         sym->flags &= ~SYMBOL_NEW;
 201                                         break;
 202                                 }
 203                                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 204                                 break;
 205                         case S_STRING:
 206                                 if (*p++ != '"')
 207                                         break;
 208                                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 209                                         if (*p2 == '"') {
 210                                                 *p2 = 0;
 211                                                 break;
 212                                         }
 213                                         memmove(p2, p2 + 1, strlen(p2));
 214                                 }
 215                                 if (!p2) {
 216                                         conf_warning("invalid string found");
 217                                         continue;
 218                                 }
 219                         case S_INT:
 220                         case S_HEX:
 221                                 if (sym_string_valid(sym, p)) {
 222                                         sym->user.val = strdup(p);
 223                                         sym->flags &= ~SYMBOL_NEW;
 224                                 } else {
 225                                         if (p[0]) /* bbox */
 226                                                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 227                                         continue;
 228                                 }
 229                                 break;
 230                         default:
 231                                 ;
 232                         }
 233                         break;
 234                 case '\n':
 235                         break;
 236                 default:
 237                         conf_warning("unexpected data");
 238                         continue;
 239                 }
 240                 if (sym && sym_is_choice_value(sym)) {
 241                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 242                         switch (sym->user.tri) {
 243                         case no:
 244                                 break;
 245                         case mod:
 246                                 if (cs->user.tri == yes) {
 247                                         conf_warning("%s creates inconsistent choice state", sym->name);
 248                                         cs->flags |= SYMBOL_NEW;
 249                                 }
 250                                 break;
 251                         case yes:
 252                                 if (cs->user.tri != no) {
 253                                         conf_warning("%s creates inconsistent choice state", sym->name);
 254                                         cs->flags |= SYMBOL_NEW;
 255                                 } else
 256                                         cs->user.val = sym;
 257                                 break;
 258                         }
 259                         cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
 260                 }
 261         }
 262         fclose(in);
 263
 264         if (modules_sym)
 265                 sym_calc_value(modules_sym);
 266         return 0;
 267 }
 268
 269 int conf_read(const char *name)
 270 {
 271         struct symbol *sym;
 272         struct property *prop;
 273         struct expr *e;
 274         int i;
 275
 276         if (conf_read_simple(name))
 277                 return 1;
 278
 279         for_all_symbols(i, sym) {
 280                 sym_calc_value(sym);
 281                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 282                         goto sym_ok;
 283                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 284                         /* check that calculated value agrees with saved value */
 285                         switch (sym->type) {
 286                         case S_BOOLEAN:
 287                         case S_TRISTATE:
 288                                 if (sym->user.tri != sym_get_tristate_value(sym))
 289                                         break;
 290                                 if (!sym_is_choice(sym))
 291                                         goto sym_ok;
 292                         default:
 293                                 if (!strcmp(sym->curr.val, sym->user.val))
 294                                         goto sym_ok;
 295                                 break;
 296                         }
 297                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 298                         /* no previous value and not saved */
 299                         goto sym_ok;
 300                 conf_unsaved++;
 301                 /* maybe print value in verbose mode... */
 302         sym_ok:
 303                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 304                         if (sym->visible == no)
 305                                 sym->flags |= SYMBOL_NEW;
 306                         switch (sym->type) {
 307                         case S_STRING:
 308                         case S_INT:
 309                         case S_HEX:
 310                                 if (!sym_string_within_range(sym, sym->user.val)) {
 311                                         sym->flags |= SYMBOL_NEW;
 312                                         sym->flags &= ~SYMBOL_VALID;
 313                                 }
 314                         default:
 315                                 break;
 316                         }
 317                 }
 318                 if (!sym_is_choice(sym))
 319                         continue;
 320                 prop = sym_get_choice_prop(sym);
 321                 for (e = prop->expr; e; e = e->left.expr)
 322                         if (e->right.sym->visible != no)
 323                                 sym->flags |= e->right.sym->flags & SYMBOL_NEW;
 324         }
 325
 326         sym_change_count = conf_warnings || conf_unsaved;
 327
 328         return 0;
 329 }
 330
 331 int conf_write(const char *name)
 332 {
 333         FILE *out, *out_h;
 334         struct symbol *sym;
 335         struct menu *menu;
 336         const char *basename;
 337         char dirname[128];
 338         char tmpname[256];
 339         char newname[256];
 340         int type, l;
 341         const char *str;
 342         time_t now;
 343         int use_timestamp = 1;
 344         char *env;
 345
 346         dirname[0] = 0;
 347         if (name && name[0]) {
 348                 struct stat st;
 349                 char *slash;
 350
 351                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 352                         strcpy(dirname, name);
 353                         strcat(dirname, "/");
 354                         basename = conf_def_filename;
 355                 } else if ((slash = strrchr(name, '/'))) {
 356                         int size = slash - name + 1;
 357                         memcpy(dirname, name, size);
 358                         dirname[size] = 0;
 359                         if (slash[1])
 360                                 basename = slash + 1;
 361                         else
 362                                 basename = conf_def_filename;
 363                 } else
 364                         basename = name;
 365         } else
 366                 basename = conf_def_filename;
 367
 368         sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
 369         out = fopen(newname, "w");
 370         if (!out)
 371                 return 1;
 372         out_h = NULL;
 373         if (!name) {
 374                 out_h = fopen(".tmpconfig.h", "w");
 375                 if (!out_h)
 376                         return 1;
 377                 file_write_dep(NULL);
 378         }
 379         sym = sym_lookup("KERNELVERSION", 0);
 380         sym_calc_value(sym);
 381         time(&now);
 382         env = getenv("KCONFIG_NOTIMESTAMP");
 383         if (env && *env)
 384                 use_timestamp = 0;
 385
 386         fprintf(out, _("#\n"
 387                        "# Automatically generated make config: don't edit\n"
 388                        "# Busybox version: %s\n"
 389                        "%s%s"
 390                        "#\n"),
 391                      sym_get_string_value(sym),
 392                      use_timestamp ? "# " : "",
 393                      use_timestamp ? ctime(&now) : "");
 394         if (out_h) {
 395                 char buf[sizeof("#define AUTOCONF_TIMESTAMP "
 396                                 "\"YYYY-MM-DD HH:MM:SS some_timezone\"\n")];
 397                 buf[0] = '\0';
 398                 if (use_timestamp) {
 399                         size_t ret = \
 400                                 strftime(buf, sizeof(buf), "#define AUTOCONF_TIMESTAMP "
 401                                         "\"%Y-%m-%d %H:%M:%S %Z\"\n", localtime(&now));
 402                         /* if user has Factory timezone or some other odd install, the
 403                          * %Z above will overflow the string leaving us with undefined
 404                          * results ... so let's try again without the timezone.
 405                          */
 406                         if (ret == 0)
 407                                 strftime(buf, sizeof(buf), "#define AUTOCONF_TIMESTAMP "
 408                                         "\"%Y-%m-%d %H:%M:%S\"\n", localtime(&now));
 409                 } else { /* bbox */
 410                         strcpy(buf, "#define AUTOCONF_TIMESTAMP \"\"\n");
 411                 }
 412                 fprintf(out_h, "/*\n"
 413                                " * Automatically generated C config: don't edit\n"
 414                                " * Busybox version: %s\n"
 415                                " */\n"
 416                                "%s"
 417                                "\n",
 418                                sym_get_string_value(sym),
 419                                buf);
 420         }
 421         if (!sym_change_count)
 422                 sym_clear_all_valid();
 423
 424         menu = rootmenu.list;
 425         while (menu) {
 426                 sym = menu->sym;
 427                 if (!sym) {
 428                         if (!menu_is_visible(menu))
 429                                 goto next;
 430                         str = menu_get_prompt(menu);
 431                         fprintf(out, "\n"
 432                                      "#\n"
 433                                      "# %s\n"
 434                                      "#\n", str);
 435                         if (out_h)
 436                                 fprintf(out_h, "\n"
 437                                                "/*\n"
 438                                                " * %s\n"
 439                                                " */\n", str);
 440                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 441                         sym_calc_value(sym);
 442 /* bbox: we want to see all syms
 443                         if (!(sym->flags & SYMBOL_WRITE))
 444                                 goto next;
 445 */
 446                         sym->flags &= ~SYMBOL_WRITE;
 447                         type = sym->type;
 448                         if (type == S_TRISTATE) {
 449                                 sym_calc_value(modules_sym);
 450                                 if (modules_sym->curr.tri == no)
 451                                         type = S_BOOLEAN;
 452                         }
 453                         switch (type) {
 454                         case S_BOOLEAN:
 455                         case S_TRISTATE:
 456                                 switch (sym_get_tristate_value(sym)) {
 457                                 case no:
 458                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 459                                         if (out_h) {
 460                                                 fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
 461                                                 /* bbox */
 462                                                 fprintf(out_h, "#define ENABLE_%s 0\n", sym->name);
 463                                                 fprintf(out_h, "#define IF_%s(...)\n", sym->name);
 464                                                 fprintf(out_h, "#define IF_NOT_%s(...) __VA_ARGS__\n", sym->name);
 465                                         }
 466                                         break;
 467                                 case mod:
 468                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
 469                                         if (out_h)
 470                                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 471                                         break;
 472                                 case yes:
 473                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
 474                                         if (out_h) {
 475                                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
 476                                                 /* bbox */
 477                                                 fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
 478                                                 fprintf(out_h, "#ifdef MAKE_SUID\n");
 479                                                 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__ \"CONFIG_%s\"\n", sym->name, sym->name);
 480                                                 fprintf(out_h, "#else\n");
 481                                                 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__\n", sym->name);
 482                                                 fprintf(out_h, "#endif\n");
 483                                                 fprintf(out_h, "#define IF_NOT_%s(...)\n", sym->name);
 484                                         }
 485                                         break;
 486                                 }
 487                                 break;
 488                         case S_STRING:
 489                                 // fix me
 490                                 str = sym_get_string_value(sym);
 491                                 fprintf(out, "CONFIG_%s=\"", sym->name);
 492                                 if (out_h)
 493                                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
 494                                 do {
 495                                         l = strcspn(str, "\"\\");
 496                                         if (l) {
 497                                                 fwrite(str, l, 1, out);
 498                                                 if (out_h)
 499                                                         fwrite(str, l, 1, out_h);
 500                                         }
 501                                         str += l;
 502                                         while (*str == '\\' || *str == '"') {
 503                                                 fprintf(out, "\\%c", *str);
 504                                                 if (out_h)
 505                                                         fprintf(out_h, "\\%c", *str);
 506                                                 str++;
 507                                         }
 508                                 } while (*str);
 509                                 fputs("\"\n", out);
 510                                 if (out_h) {
 511                                         fputs("\"\n", out_h);
 512                                         /* bbox */
 513                                         fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
 514                                         fprintf(out_h, "#ifdef MAKE_SUID\n");
 515                                         fprintf(out_h, "# define IF_%s(...) __VA_ARGS__ \"CONFIG_%s\"\n", sym->name, sym->name);
 516                                         fprintf(out_h, "#else\n");
 517                                         fprintf(out_h, "# define IF_%s(...) __VA_ARGS__\n", sym->name);
 518                                         fprintf(out_h, "#endif\n");
 519                                         fprintf(out_h, "#define IF_NOT_%s(...)\n", sym->name);
 520                                 }
 521                                 break;
 522                         case S_HEX:
 523                                 str = sym_get_string_value(sym);
 524                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 525                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 526                                         if (out_h) {
 527                                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 528                                                 /* bbox */
 529                                                 fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
 530                                                 fprintf(out_h, "#ifdef MAKE_SUID\n");
 531                                                 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__ \"CONFIG_%s\"\n", sym->name, sym->name);
 532                                                 fprintf(out_h, "#else\n");
 533                                                 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__\n", sym->name);
 534                                                 fprintf(out_h, "#endif\n");
 535                                                 fprintf(out_h, "#define IF_NOT_%s(...)\n", sym->name);
 536                                         }
 537                                         break;
 538                                 }
 539                         case S_INT:
 540                                 str = sym_get_string_value(sym);
 541                                 if (!str[0])
 542                                         str = "0";
 543                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 544                                 if (out_h) {
 545                                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
 546                                         /* bbox */
 547                                         fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
 548                                         fprintf(out_h, "#ifdef MAKE_SUID\n");
 549                                         fprintf(out_h, "# define IF_%s(...) __VA_ARGS__ \"CONFIG_%s\"\n", sym->name, sym->name);
 550                                         fprintf(out_h, "#else\n");
 551                                         fprintf(out_h, "# define IF_%s(...) __VA_ARGS__\n", sym->name);
 552                                         fprintf(out_h, "#endif\n");
 553                                         fprintf(out_h, "#define IF_NOT_%s(...)\n", sym->name);
 554                                 }
 555                                 break;
 556                         }
 557                 }
 558
 559         next:
 560                 if (menu->list) {
 561                         menu = menu->list;
 562                         continue;
 563                 }
 564                 if (menu->next)
 565                         menu = menu->next;
 566                 else while ((menu = menu->parent)) {
 567                         if (menu->next) {
 568                                 menu = menu->next;
 569                                 break;
 570                         }
 571                 }
 572         }
 573         fclose(out);
 574         if (out_h) {
 575                 fclose(out_h);
 576                 rename(".tmpconfig.h", "include/autoconf.h");
 577         }
 578         if (!name || basename != conf_def_filename) {
 579                 if (!name)
 580                         name = conf_def_filename;
 581                 sprintf(tmpname, "%s.old", name);
 582                 rename(name, tmpname);
 583         }
 584         sprintf(tmpname, "%s%s", dirname, basename);
 585         if (rename(newname, tmpname))
 586                 return 1;
 587
 588         sym_change_count = 0;
 589
 590         return 0;
 591 }