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