err.no Git - linux-2.6/blob - 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[] = "arch/$ARCH/defconfig";
  26
  27 const char *conf_confnames[] = {
  28         ".config",
  29         "/lib/modules/$UNAME_RELEASE/.config",
  30         "/etc/kernel-config",
  31         "/boot/config-$UNAME_RELEASE",
  32         conf_defname,
  33         NULL,
  34 };
  35
  36 static void conf_warning(const char *fmt, ...)
  37 {
  38         va_list ap;
  39         va_start(ap, fmt);
  40         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  41         vfprintf(stderr, fmt, ap);
  42         fprintf(stderr, "\n");
  43         va_end(ap);
  44         conf_warnings++;
  45 }
  46
  47 static char *conf_expand_value(const char *in)
  48 {
  49         struct symbol *sym;
  50         const char *src;
  51         static char res_value[SYMBOL_MAXLENGTH];
  52         char *dst, name[SYMBOL_MAXLENGTH];
  53
  54         res_value[0] = 0;
  55         dst = name;
  56         while ((src = strchr(in, '$'))) {
  57                 strncat(res_value, in, src - in);
  58                 src++;
  59                 dst = name;
  60                 while (isalnum(*src) || *src == '_')
  61                         *dst++ = *src++;
  62                 *dst = 0;
  63                 sym = sym_lookup(name, 0);
  64                 sym_calc_value(sym);
  65                 strcat(res_value, sym_get_string_value(sym));
  66                 in = src;
  67         }
  68         strcat(res_value, in);
  69
  70         return res_value;
  71 }
  72
  73 char *conf_get_default_confname(void)
  74 {
  75         struct stat buf;
  76         static char fullname[PATH_MAX+1];
  77         char *env, *name;
  78
  79         name = conf_expand_value(conf_defname);
  80         env = getenv(SRCTREE);
  81         if (env) {
  82                 sprintf(fullname, "%s/%s", env, name);
  83                 if (!stat(fullname, &buf))
  84                         return fullname;
  85         }
  86         return name;
  87 }
  88
  89 int conf_read_simple(const char *name, int def)
  90 {
  91         FILE *in = NULL;
  92         char line[1024];
  93         char *p, *p2;
  94         struct symbol *sym;
  95         int i, def_flags;
  96
  97         if (name) {
  98                 in = zconf_fopen(name);
  99         } else {
 100                 const char **names = conf_confnames;
 101                 name = *names++;
 102                 if (!name)
 103                         return 1;
 104                 in = zconf_fopen(name);
 105                 if (in)
 106                         goto load;
 107                 sym_change_count++;
 108                 while ((name = *names++)) {
 109                         name = conf_expand_value(name);
 110                         in = zconf_fopen(name);
 111                         if (in) {
 112                                 printf(_("#\n"
 113                                          "# using defaults found in %s\n"
 114                                          "#\n"), name);
 115                                 goto load;
 116                         }
 117                 }
 118         }
 119         if (!in)
 120                 return 1;
 121
 122 load:
 123         conf_filename = name;
 124         conf_lineno = 0;
 125         conf_warnings = 0;
 126         conf_unsaved = 0;
 127
 128         def_flags = SYMBOL_DEF << def;
 129         for_all_symbols(i, sym) {
 130                 sym->flags |= SYMBOL_CHANGED;
 131                 sym->flags &= ~(def_flags|SYMBOL_VALID);
 132                 if (sym_is_choice(sym))
 133                         sym->flags |= def_flags;
 134                 switch (sym->type) {
 135                 case S_INT:
 136                 case S_HEX:
 137                 case S_STRING:
 138                         if (sym->def[def].val)
 139                                 free(sym->def[def].val);
 140                 default:
 141                         sym->def[def].val = NULL;
 142                         sym->def[def].tri = no;
 143                 }
 144         }
 145
 146         while (fgets(line, sizeof(line), in)) {
 147                 conf_lineno++;
 148                 sym = NULL;
 149                 switch (line[0]) {
 150                 case '#':
 151                         if (memcmp(line + 2, "CONFIG_", 7))
 152                                 continue;
 153                         p = strchr(line + 9, ' ');
 154                         if (!p)
 155                                 continue;
 156                         *p++ = 0;
 157                         if (strncmp(p, "is not set", 10))
 158                                 continue;
 159                         if (def == S_DEF_USER) {
 160                                 sym = sym_find(line + 9);
 161                                 if (!sym) {
 162                                         conf_warning("trying to assign nonexistent symbol %s", line + 9);
 163                                         break;
 164                                 }
 165                         } else {
 166                                 sym = sym_lookup(line + 9, 0);
 167                                 if (sym->type == S_UNKNOWN)
 168                                         sym->type = S_BOOLEAN;
 169                         }
 170                         if (sym->flags & def_flags) {
 171                                 conf_warning("trying to reassign symbol %s", sym->name);
 172                                 break;
 173                         }
 174                         switch (sym->type) {
 175                         case S_BOOLEAN:
 176                         case S_TRISTATE:
 177                                 sym->def[def].tri = no;
 178                                 sym->flags |= def_flags;
 179                                 break;
 180                         default:
 181                                 ;
 182                         }
 183                         break;
 184                 case 'C':
 185                         if (memcmp(line, "CONFIG_", 7)) {
 186                                 conf_warning("unexpected data");
 187                                 continue;
 188                         }
 189                         p = strchr(line + 7, '=');
 190                         if (!p)
 191                                 continue;
 192                         *p++ = 0;
 193                         p2 = strchr(p, '\n');
 194                         if (p2)
 195                                 *p2 = 0;
 196                         if (def == S_DEF_USER) {
 197                                 sym = sym_find(line + 7);
 198                                 if (!sym) {
 199                                         conf_warning("trying to assign nonexistent symbol %s", line + 7);
 200                                         break;
 201                                 }
 202                         } else {
 203                                 sym = sym_lookup(line + 7, 0);
 204                                 if (sym->type == S_UNKNOWN)
 205                                         sym->type = S_OTHER;
 206                         }
 207                         if (sym->flags & def_flags) {
 208                                 conf_warning("trying to reassign symbol %s", sym->name);
 209                                 break;
 210                         }
 211                         switch (sym->type) {
 212                         case S_TRISTATE:
 213                                 if (p[0] == 'm') {
 214                                         sym->def[def].tri = mod;
 215                                         sym->flags |= def_flags;
 216                                         break;
 217                                 }
 218                         case S_BOOLEAN:
 219                                 if (p[0] == 'y') {
 220                                         sym->def[def].tri = yes;
 221                                         sym->flags |= def_flags;
 222                                         break;
 223                                 }
 224                                 if (p[0] == 'n') {
 225                                         sym->def[def].tri = no;
 226                                         sym->flags |= def_flags;
 227                                         break;
 228                                 }
 229                                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 230                                 break;
 231                         case S_OTHER:
 232                                 if (*p != '"') {
 233                                         for (p2 = p; *p2 && !isspace(*p2); p2++)
 234                                                 ;
 235                                         sym->type = S_STRING;
 236                                         goto done;
 237                                 }
 238                         case S_STRING:
 239                                 if (*p++ != '"')
 240                                         break;
 241                                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 242                                         if (*p2 == '"') {
 243                                                 *p2 = 0;
 244                                                 break;
 245                                         }
 246                                         memmove(p2, p2 + 1, strlen(p2));
 247                                 }
 248                                 if (!p2) {
 249                                         conf_warning("invalid string found");
 250                                         continue;
 251                                 }
 252                         case S_INT:
 253                         case S_HEX:
 254                         done:
 255                                 if (sym_string_valid(sym, p)) {
 256                                         sym->def[def].val = strdup(p);
 257                                         sym->flags |= def_flags;
 258                                 } else {
 259                                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 260                                         continue;
 261                                 }
 262                                 break;
 263                         default:
 264                                 ;
 265                         }
 266                         break;
 267                 case '\n':
 268                         break;
 269                 default:
 270                         conf_warning("unexpected data");
 271                         continue;
 272                 }
 273                 if (sym && sym_is_choice_value(sym)) {
 274                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 275                         switch (sym->def[def].tri) {
 276                         case no:
 277                                 break;
 278                         case mod:
 279                                 if (cs->def[def].tri == yes) {
 280                                         conf_warning("%s creates inconsistent choice state", sym->name);
 281                                         cs->flags &= ~def_flags;
 282                                 }
 283                                 break;
 284                         case yes:
 285                                 if (cs->def[def].tri != no) {
 286                                         conf_warning("%s creates inconsistent choice state", sym->name);
 287                                         cs->flags &= ~def_flags;
 288                                 } else
 289                                         cs->def[def].val = sym;
 290                                 break;
 291                         }
 292                         cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
 293                 }
 294         }
 295         fclose(in);
 296
 297         if (modules_sym)
 298                 sym_calc_value(modules_sym);
 299         return 0;
 300 }
 301
 302 int conf_read(const char *name)
 303 {
 304         struct symbol *sym;
 305         struct property *prop;
 306         struct expr *e;
 307         int i, flags;
 308
 309         sym_change_count = 0;
 310
 311         if (conf_read_simple(name, S_DEF_USER))
 312                 return 1;
 313
 314         for_all_symbols(i, sym) {
 315                 sym_calc_value(sym);
 316                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 317                         goto sym_ok;
 318                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 319                         /* check that calculated value agrees with saved value */
 320                         switch (sym->type) {
 321                         case S_BOOLEAN:
 322                         case S_TRISTATE:
 323                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
 324                                         break;
 325                                 if (!sym_is_choice(sym))
 326                                         goto sym_ok;
 327                         default:
 328                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
 329                                         goto sym_ok;
 330                                 break;
 331                         }
 332                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 333                         /* no previous value and not saved */
 334                         goto sym_ok;
 335                 conf_unsaved++;
 336                 /* maybe print value in verbose mode... */
 337         sym_ok:
 338                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 339                         if (sym->visible == no)
 340                                 sym->flags &= ~SYMBOL_DEF_USER;
 341                         switch (sym->type) {
 342                         case S_STRING:
 343                         case S_INT:
 344                         case S_HEX:
 345                                 if (!sym_string_within_range(sym, sym->def[S_DEF_USER].val))
 346                                         sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
 347                         default:
 348                                 break;
 349                         }
 350                 }
 351                 if (!sym_is_choice(sym))
 352                         continue;
 353                 prop = sym_get_choice_prop(sym);
 354                 flags = sym->flags;
 355                 for (e = prop->expr; e; e = e->left.expr)
 356                         if (e->right.sym->visible != no)
 357                                 flags &= e->right.sym->flags;
 358                 sym->flags |= flags & SYMBOL_DEF_USER;
 359         }
 360
 361         sym_change_count += conf_warnings || conf_unsaved;
 362
 363         return 0;
 364 }
 365
 366 int conf_write(const char *name)
 367 {
 368         FILE *out;
 369         struct symbol *sym;
 370         struct menu *menu;
 371         const char *basename;
 372         char dirname[128], tmpname[128], newname[128];
 373         int type, l;
 374         const char *str;
 375         time_t now;
 376         int use_timestamp = 1;
 377         char *env;
 378
 379         dirname[0] = 0;
 380         if (name && name[0]) {
 381                 struct stat st;
 382                 char *slash;
 383
 384                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 385                         strcpy(dirname, name);
 386                         strcat(dirname, "/");
 387                         basename = conf_def_filename;
 388                 } else if ((slash = strrchr(name, '/'))) {
 389                         int size = slash - name + 1;
 390                         memcpy(dirname, name, size);
 391                         dirname[size] = 0;
 392                         if (slash[1])
 393                                 basename = slash + 1;
 394                         else
 395                                 basename = conf_def_filename;
 396                 } else
 397                         basename = name;
 398         } else
 399                 basename = conf_def_filename;
 400
 401         sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
 402         out = fopen(newname, "w");
 403         if (!out)
 404                 return 1;
 405         sym = sym_lookup("KERNELVERSION", 0);
 406         sym_calc_value(sym);
 407         time(&now);
 408         env = getenv("KCONFIG_NOTIMESTAMP");
 409         if (env && *env)
 410                 use_timestamp = 0;
 411
 412         fprintf(out, _("#\n"
 413                        "# Automatically generated make config: don't edit\n"
 414                        "# Linux kernel version: %s\n"
 415                        "%s%s"
 416                        "#\n"),
 417                      sym_get_string_value(sym),
 418                      use_timestamp ? "# " : "",
 419                      use_timestamp ? ctime(&now) : "");
 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                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 436                         sym_calc_value(sym);
 437                         if (!(sym->flags & SYMBOL_WRITE))
 438                                 goto next;
 439                         sym->flags &= ~SYMBOL_WRITE;
 440                         type = sym->type;
 441                         if (type == S_TRISTATE) {
 442                                 sym_calc_value(modules_sym);
 443                                 if (modules_sym->curr.tri == no)
 444                                         type = S_BOOLEAN;
 445                         }
 446                         switch (type) {
 447                         case S_BOOLEAN:
 448                         case S_TRISTATE:
 449                                 switch (sym_get_tristate_value(sym)) {
 450                                 case no:
 451                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 452                                         break;
 453                                 case mod:
 454                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
 455                                         break;
 456                                 case yes:
 457                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
 458                                         break;
 459                                 }
 460                                 break;
 461                         case S_STRING:
 462                                 str = sym_get_string_value(sym);
 463                                 fprintf(out, "CONFIG_%s=\"", sym->name);
 464                                 while (1) {
 465                                         l = strcspn(str, "\"\\");
 466                                         if (l) {
 467                                                 fwrite(str, l, 1, out);
 468                                                 str += l;
 469                                         }
 470                                         if (!*str)
 471                                                 break;
 472                                         fprintf(out, "\\%c", *str++);
 473                                 }
 474                                 fputs("\"\n", out);
 475                                 break;
 476                         case S_HEX:
 477                                 str = sym_get_string_value(sym);
 478                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 479                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 480                                         break;
 481                                 }
 482                         case S_INT:
 483                                 str = sym_get_string_value(sym);
 484                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 485                                 break;
 486                         }
 487                 }
 488
 489         next:
 490                 if (menu->list) {
 491                         menu = menu->list;
 492                         continue;
 493                 }
 494                 if (menu->next)
 495                         menu = menu->next;
 496                 else while ((menu = menu->parent)) {
 497                         if (menu->next) {
 498                                 menu = menu->next;
 499                                 break;
 500                         }
 501                 }
 502         }
 503         fclose(out);
 504         if (!name || basename != conf_def_filename) {
 505                 if (!name)
 506                         name = conf_def_filename;
 507                 sprintf(tmpname, "%s.old", name);
 508                 rename(name, tmpname);
 509         }
 510         sprintf(tmpname, "%s%s", dirname, basename);
 511         if (rename(newname, tmpname))
 512                 return 1;
 513
 514         printf(_("#\n"
 515                  "# configuration written to %s\n"
 516                  "#\n"), tmpname);
 517
 518         sym_change_count = 0;
 519
 520         return 0;
 521 }
 522
 523 int conf_write_autoconf(void)
 524 {
 525         struct symbol *sym;
 526         const char *str;
 527         char *name;
 528         FILE *out, *out_h;
 529         time_t now;
 530         int i, l;
 531
 532         file_write_dep("include/config/auto.conf.cmd");
 533
 534         out = fopen(".tmpconfig", "w");
 535         if (!out)
 536                 return 1;
 537
 538         out_h = fopen(".tmpconfig.h", "w");
 539         if (!out_h) {
 540                 fclose(out);
 541                 return 1;
 542         }
 543
 544         sym = sym_lookup("KERNELVERSION", 0);
 545         sym_calc_value(sym);
 546         time(&now);
 547         fprintf(out, "#\n"
 548                      "# Automatically generated make config: don't edit\n"
 549                      "# Linux kernel version: %s\n"
 550                      "# %s"
 551                      "#\n",
 552                      sym_get_string_value(sym), ctime(&now));
 553         fprintf(out_h, "/*\n"
 554                        " * Automatically generated C config: don't edit\n"
 555                        " * Linux kernel version: %s\n"
 556                        " * %s"
 557                        " */\n"
 558                        "#define AUTOCONF_INCLUDED\n",
 559                        sym_get_string_value(sym), ctime(&now));
 560
 561         sym_clear_all_valid();
 562
 563         for_all_symbols(i, sym) {
 564                 sym_calc_value(sym);
 565                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 566                         continue;
 567                 switch (sym->type) {
 568                 case S_BOOLEAN:
 569                 case S_TRISTATE:
 570                         switch (sym_get_tristate_value(sym)) {
 571                         case no:
 572                                 break;
 573                         case mod:
 574                                 fprintf(out, "CONFIG_%s=m\n", sym->name);
 575                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 576                                 break;
 577                         case yes:
 578                                 fprintf(out, "CONFIG_%s=y\n", sym->name);
 579                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
 580                                 break;
 581                         }
 582                         break;
 583                 case S_STRING:
 584                         str = sym_get_string_value(sym);
 585                         fprintf(out, "CONFIG_%s=\"", sym->name);
 586                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
 587                         while (1) {
 588                                 l = strcspn(str, "\"\\");
 589                                 if (l) {
 590                                         fwrite(str, l, 1, out);
 591                                         fwrite(str, l, 1, out_h);
 592                                         str += l;
 593                                 }
 594                                 if (!*str)
 595                                         break;
 596                                 fprintf(out, "\\%c", *str);
 597                                 fprintf(out_h, "\\%c", *str);
 598                                 str++;
 599                         }
 600                         fputs("\"\n", out);
 601                         fputs("\"\n", out_h);
 602                         break;
 603                 case S_HEX:
 604                         str = sym_get_string_value(sym);
 605                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 606                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 607                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 608                                 break;
 609                         }
 610                 case S_INT:
 611                         str = sym_get_string_value(sym);
 612                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 613                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
 614                         break;
 615                 default:
 616                         break;
 617                 }
 618         }
 619         fclose(out);
 620         fclose(out_h);
 621
 622         name = getenv("KCONFIG_AUTOHEADER");
 623         if (!name)
 624                 name = "include/linux/autoconf.h";
 625         if (rename(".tmpconfig.h", name))
 626                 return 1;
 627         name = getenv("KCONFIG_AUTOCONFIG");
 628         if (!name)
 629                 name = "include/config/auto.conf";
 630         /*
 631          * This must be the last step, kbuild has a dependency on auto.conf
 632          * and this marks the successful completion of the previous steps.
 633          */
 634         if (rename(".tmpconfig", name))
 635                 return 1;
 636
 637         return 0;
 638 }