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)
  90 {
  91         FILE *in = NULL;
  92         char line[1024];
  93         char *p, *p2;
  94         struct symbol *sym;
  95         int i;
  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         for_all_symbols(i, sym) {
 129                 sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
 130                 if (sym_is_choice(sym))
 131                         sym->flags &= ~SYMBOL_NEW;
 132                 sym->flags &= ~SYMBOL_VALID;
 133                 switch (sym->type) {
 134                 case S_INT:
 135                 case S_HEX:
 136                 case S_STRING:
 137                         if (sym->user.val)
 138                                 free(sym->user.val);
 139                 default:
 140                         sym->user.val = NULL;
 141                         sym->user.tri = no;
 142                 }
 143         }
 144
 145         while (fgets(line, sizeof(line), in)) {
 146                 conf_lineno++;
 147                 sym = NULL;
 148                 switch (line[0]) {
 149                 case '#':
 150                         if (memcmp(line + 2, "CONFIG_", 7))
 151                                 continue;
 152                         p = strchr(line + 9, ' ');
 153                         if (!p)
 154                                 continue;
 155                         *p++ = 0;
 156                         if (strncmp(p, "is not set", 10))
 157                                 continue;
 158                         sym = sym_find(line + 9);
 159                         if (!sym) {
 160                                 conf_warning("trying to assign nonexistent symbol %s", line + 9);
 161                                 break;
 162                         } else if (!(sym->flags & SYMBOL_NEW)) {
 163                                 conf_warning("trying to reassign symbol %s", sym->name);
 164                                 break;
 165                         }
 166                         switch (sym->type) {
 167                         case S_BOOLEAN:
 168                         case S_TRISTATE:
 169                                 sym->user.tri = no;
 170                                 sym->flags &= ~SYMBOL_NEW;
 171                                 break;
 172                         default:
 173                                 ;
 174                         }
 175                         break;
 176                 case 'C':
 177                         if (memcmp(line, "CONFIG_", 7)) {
 178                                 conf_warning("unexpected data");
 179                                 continue;
 180                         }
 181                         p = strchr(line + 7, '=');
 182                         if (!p)
 183                                 continue;
 184                         *p++ = 0;
 185                         p2 = strchr(p, '\n');
 186                         if (p2)
 187                                 *p2 = 0;
 188                         sym = sym_find(line + 7);
 189                         if (!sym) {
 190                                 conf_warning("trying to assign nonexistent symbol %s", line + 7);
 191                                 break;
 192                         } else if (!(sym->flags & SYMBOL_NEW)) {
 193                                 conf_warning("trying to reassign symbol %s", sym->name);
 194                                 break;
 195                         }
 196                         switch (sym->type) {
 197                         case S_TRISTATE:
 198                                 if (p[0] == 'm') {
 199                                         sym->user.tri = mod;
 200                                         sym->flags &= ~SYMBOL_NEW;
 201                                         break;
 202                                 }
 203                         case S_BOOLEAN:
 204                                 if (p[0] == 'y') {
 205                                         sym->user.tri = yes;
 206                                         sym->flags &= ~SYMBOL_NEW;
 207                                         break;
 208                                 }
 209                                 if (p[0] == 'n') {
 210                                         sym->user.tri = no;
 211                                         sym->flags &= ~SYMBOL_NEW;
 212                                         break;
 213                                 }
 214                                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 215                                 break;
 216                         case S_STRING:
 217                                 if (*p++ != '"')
 218                                         break;
 219                                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 220                                         if (*p2 == '"') {
 221                                                 *p2 = 0;
 222                                                 break;
 223                                         }
 224                                         memmove(p2, p2 + 1, strlen(p2));
 225                                 }
 226                                 if (!p2) {
 227                                         conf_warning("invalid string found");
 228                                         continue;
 229                                 }
 230                         case S_INT:
 231                         case S_HEX:
 232                                 if (sym_string_valid(sym, p)) {
 233                                         sym->user.val = strdup(p);
 234                                         sym->flags &= ~SYMBOL_NEW;
 235                                 } else {
 236                                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 237                                         continue;
 238                                 }
 239                                 break;
 240                         default:
 241                                 ;
 242                         }
 243                         break;
 244                 case '\n':
 245                         break;
 246                 default:
 247                         conf_warning("unexpected data");
 248                         continue;
 249                 }
 250                 if (sym && sym_is_choice_value(sym)) {
 251                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 252                         switch (sym->user.tri) {
 253                         case no:
 254                                 break;
 255                         case mod:
 256                                 if (cs->user.tri == yes) {
 257                                         conf_warning("%s creates inconsistent choice state", sym->name);
 258                                         cs->flags |= SYMBOL_NEW;
 259                                 }
 260                                 break;
 261                         case yes:
 262                                 if (cs->user.tri != no) {
 263                                         conf_warning("%s creates inconsistent choice state", sym->name);
 264                                         cs->flags |= SYMBOL_NEW;
 265                                 } else
 266                                         cs->user.val = sym;
 267                                 break;
 268                         }
 269                         cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
 270                 }
 271         }
 272         fclose(in);
 273
 274         if (modules_sym)
 275                 sym_calc_value(modules_sym);
 276         return 0;
 277 }
 278
 279 int conf_read(const char *name)
 280 {
 281         struct symbol *sym;
 282         struct property *prop;
 283         struct expr *e;
 284         int i;
 285
 286         sym_change_count = 0;
 287
 288         if (conf_read_simple(name))
 289                 return 1;
 290
 291         for_all_symbols(i, sym) {
 292                 sym_calc_value(sym);
 293                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 294                         goto sym_ok;
 295                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 296                         /* check that calculated value agrees with saved value */
 297                         switch (sym->type) {
 298                         case S_BOOLEAN:
 299                         case S_TRISTATE:
 300                                 if (sym->user.tri != sym_get_tristate_value(sym))
 301                                         break;
 302                                 if (!sym_is_choice(sym))
 303                                         goto sym_ok;
 304                         default:
 305                                 if (!strcmp(sym->curr.val, sym->user.val))
 306                                         goto sym_ok;
 307                                 break;
 308                         }
 309                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 310                         /* no previous value and not saved */
 311                         goto sym_ok;
 312                 conf_unsaved++;
 313                 /* maybe print value in verbose mode... */
 314         sym_ok:
 315                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 316                         if (sym->visible == no)
 317                                 sym->flags |= SYMBOL_NEW;
 318                         switch (sym->type) {
 319                         case S_STRING:
 320                         case S_INT:
 321                         case S_HEX:
 322                                 if (!sym_string_within_range(sym, sym->user.val)) {
 323                                         sym->flags |= SYMBOL_NEW;
 324                                         sym->flags &= ~SYMBOL_VALID;
 325                                 }
 326                         default:
 327                                 break;
 328                         }
 329                 }
 330                 if (!sym_is_choice(sym))
 331                         continue;
 332                 prop = sym_get_choice_prop(sym);
 333                 for (e = prop->expr; e; e = e->left.expr)
 334                         if (e->right.sym->visible != no)
 335                                 sym->flags |= e->right.sym->flags & SYMBOL_NEW;
 336         }
 337
 338         sym_change_count += conf_warnings || conf_unsaved;
 339
 340         return 0;
 341 }
 342
 343 int conf_write(const char *name)
 344 {
 345         FILE *out, *out_h;
 346         struct symbol *sym;
 347         struct menu *menu;
 348         const char *basename;
 349         char dirname[128], tmpname[128], newname[128];
 350         int type, l;
 351         const char *str;
 352         time_t now;
 353         int use_timestamp = 1;
 354         char *env;
 355
 356         dirname[0] = 0;
 357         if (name && name[0]) {
 358                 struct stat st;
 359                 char *slash;
 360
 361                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 362                         strcpy(dirname, name);
 363                         strcat(dirname, "/");
 364                         basename = conf_def_filename;
 365                 } else if ((slash = strrchr(name, '/'))) {
 366                         int size = slash - name + 1;
 367                         memcpy(dirname, name, size);
 368                         dirname[size] = 0;
 369                         if (slash[1])
 370                                 basename = slash + 1;
 371                         else
 372                                 basename = conf_def_filename;
 373                 } else
 374                         basename = name;
 375         } else
 376                 basename = conf_def_filename;
 377
 378         sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
 379         out = fopen(newname, "w");
 380         if (!out)
 381                 return 1;
 382         out_h = NULL;
 383         if (!name) {
 384                 out_h = fopen(".tmpconfig.h", "w");
 385                 if (!out_h)
 386                         return 1;
 387                 file_write_dep(NULL);
 388         }
 389         sym = sym_lookup("KERNELVERSION", 0);
 390         sym_calc_value(sym);
 391         time(&now);
 392         env = getenv("KCONFIG_NOTIMESTAMP");
 393         if (env && *env)
 394                 use_timestamp = 0;
 395
 396         fprintf(out, _("#\n"
 397                        "# Automatically generated make config: don't edit\n"
 398                        "# Linux kernel version: %s\n"
 399                        "%s%s"
 400                        "#\n"),
 401                      sym_get_string_value(sym),
 402                      use_timestamp ? "# " : "",
 403                      use_timestamp ? ctime(&now) : "");
 404         if (out_h)
 405                 fprintf(out_h, "/*\n"
 406                                " * Automatically generated C config: don't edit\n"
 407                                " * Linux kernel version: %s\n"
 408                                "%s%s"
 409                                " */\n"
 410                                "#define AUTOCONF_INCLUDED\n",
 411                                sym_get_string_value(sym),
 412                                use_timestamp ? " * " : "",
 413                                use_timestamp ? ctime(&now) : "");
 414
 415         if (!sym_change_count)
 416                 sym_clear_all_valid();
 417
 418         menu = rootmenu.list;
 419         while (menu) {
 420                 sym = menu->sym;
 421                 if (!sym) {
 422                         if (!menu_is_visible(menu))
 423                                 goto next;
 424                         str = menu_get_prompt(menu);
 425                         fprintf(out, "\n"
 426                                      "#\n"
 427                                      "# %s\n"
 428                                      "#\n", str);
 429                         if (out_h)
 430                                 fprintf(out_h, "\n"
 431                                                "/*\n"
 432                                                " * %s\n"
 433                                                " */\n", str);
 434                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 435                         sym_calc_value(sym);
 436                         if (!(sym->flags & SYMBOL_WRITE))
 437                                 goto next;
 438                         sym->flags &= ~SYMBOL_WRITE;
 439                         type = sym->type;
 440                         if (type == S_TRISTATE) {
 441                                 sym_calc_value(modules_sym);
 442                                 if (modules_sym->curr.tri == no)
 443                                         type = S_BOOLEAN;
 444                         }
 445                         switch (type) {
 446                         case S_BOOLEAN:
 447                         case S_TRISTATE:
 448                                 switch (sym_get_tristate_value(sym)) {
 449                                 case no:
 450                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 451                                         if (out_h)
 452                                                 fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
 453                                         break;
 454                                 case mod:
 455                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
 456                                         if (out_h)
 457                                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 458                                         break;
 459                                 case yes:
 460                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
 461                                         if (out_h)
 462                                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
 463                                         break;
 464                                 }
 465                                 break;
 466                         case S_STRING:
 467                                 // fix me
 468                                 str = sym_get_string_value(sym);
 469                                 fprintf(out, "CONFIG_%s=\"", sym->name);
 470                                 if (out_h)
 471                                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
 472                                 do {
 473                                         l = strcspn(str, "\"\\");
 474                                         if (l) {
 475                                                 fwrite(str, l, 1, out);
 476                                                 if (out_h)
 477                                                         fwrite(str, l, 1, out_h);
 478                                         }
 479                                         str += l;
 480                                         while (*str == '\\' || *str == '"') {
 481                                                 fprintf(out, "\\%c", *str);
 482                                                 if (out_h)
 483                                                         fprintf(out_h, "\\%c", *str);
 484                                                 str++;
 485                                         }
 486                                 } while (*str);
 487                                 fputs("\"\n", out);
 488                                 if (out_h)
 489                                         fputs("\"\n", out_h);
 490                                 break;
 491                         case S_HEX:
 492                                 str = sym_get_string_value(sym);
 493                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 494                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 495                                         if (out_h)
 496                                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 497                                         break;
 498                                 }
 499                         case S_INT:
 500                                 str = sym_get_string_value(sym);
 501                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 502                                 if (out_h)
 503                                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
 504                                 break;
 505                         }
 506                 }
 507
 508         next:
 509                 if (menu->list) {
 510                         menu = menu->list;
 511                         continue;
 512                 }
 513                 if (menu->next)
 514                         menu = menu->next;
 515                 else while ((menu = menu->parent)) {
 516                         if (menu->next) {
 517                                 menu = menu->next;
 518                                 break;
 519                         }
 520                 }
 521         }
 522         fclose(out);
 523         if (out_h) {
 524                 fclose(out_h);
 525                 rename(".tmpconfig.h", "include/linux/autoconf.h");
 526         }
 527         if (!name || basename != conf_def_filename) {
 528                 if (!name)
 529                         name = conf_def_filename;
 530                 sprintf(tmpname, "%s.old", name);
 531                 rename(name, tmpname);
 532         }
 533         sprintf(tmpname, "%s%s", dirname, basename);
 534         if (rename(newname, tmpname))
 535                 return 1;
 536
 537         printf(_("#\n"
 538                  "# configuration written to %s\n"
 539                  "#\n"), tmpname);
 540
 541         sym_change_count = 0;
 542
 543         return 0;
 544 }