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                                 cs->user.val = sym;
 234                                 break;
 235                         }
 236                         cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
 237                 }
 238         }
 239         fclose(in);
 240
 241         return 0;
 242 }
 243
 244 int conf_read_simple(const char *name, int load_config)
 245 {
 246         FILE *in = NULL;
 247         FILE *defaults = NULL;
 248         struct symbol *sym;
 249         int i;
 250         char *home_dir = getenv("HOME");
 251         char *default_config_path = NULL;
 252
 253         if(home_dir){
 254                         default_config_path = malloc(strlen(home_dir) + sizeof(LOCAL_BUILD_SETTINGS) + 1);
 255                         sprintf(default_config_path, "%s%s", home_dir, LOCAL_BUILD_SETTINGS);
 256                         defaults = zconf_fopen(default_config_path);
 257                         if(defaults)
 258                                         printf("# using buildsystem predefines from %s\n", default_config_path);
 259                         free(default_config_path);
 260         }
 261
 262         if(load_config){
 263                 if (name) {
 264                         in = zconf_fopen(name);
 265                 } else {
 266                         const char **names = conf_confnames;
 267                         while ((name = *names++)) {
 268                                 name = conf_expand_value(name);
 269                                 in = zconf_fopen(name);
 270                                 if (in) {
 271                                         printf(_("#\n"
 272                                                  "# using defaults found in %s\n"
 273                                                  "#\n"), name);
 274                                         break;
 275                                 }
 276                         }
 277                 }
 278         }
 279
 280         if (!in && !defaults)
 281                 return 1;
 282
 283         conf_filename = name;
 284         conf_lineno = 0;
 285         conf_warnings = 0;
 286         conf_unsaved = 0;
 287
 288         for_all_symbols(i, sym) {
 289                 sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
 290                 if (sym_is_choice(sym))
 291                         sym->flags &= ~SYMBOL_NEW;
 292                 sym->flags &= ~SYMBOL_VALID;
 293                 switch (sym->type) {
 294                 case S_INT:
 295                 case S_HEX:
 296                 case S_STRING:
 297                         if (sym->user.val)
 298                                 free(sym->user.val);
 299                 default:
 300                         sym->user.val = NULL;
 301                         sym->user.tri = no;
 302                 }
 303         }
 304
 305         if(defaults)
 306                 conf_read_file(defaults, sym);
 307
 308         if(in)
 309                 conf_read_file(in, sym);
 310
 311         if (modules_sym)
 312                 sym_calc_value(modules_sym);
 313
 314         return 0;
 315 }
 316
 317 int conf_read(const char *name)
 318 {
 319         struct symbol *sym;
 320         struct property *prop;
 321         struct expr *e;
 322         int i;
 323
 324         if (conf_read_simple(name, 1))
 325                 return 1;
 326
 327         for_all_symbols(i, sym) {
 328                 sym_calc_value(sym);
 329                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 330                         goto sym_ok;
 331                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 332                         /* check that calculated value agrees with saved value */
 333                         switch (sym->type) {
 334                         case S_BOOLEAN:
 335                         case S_TRISTATE:
 336                                 if (sym->user.tri != sym_get_tristate_value(sym))
 337                                         break;
 338                                 if (!sym_is_choice(sym))
 339                                         goto sym_ok;
 340                         default:
 341                                 if (!strcmp(sym->curr.val, sym->user.val))
 342                                         goto sym_ok;
 343                                 break;
 344                         }
 345                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 346                         /* no previous value and not saved */
 347                         goto sym_ok;
 348                 conf_unsaved++;
 349                 /* maybe print value in verbose mode... */
 350         sym_ok:
 351                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 352                         if (sym->visible == no)
 353                                 sym->flags |= SYMBOL_NEW;
 354                         switch (sym->type) {
 355                         case S_STRING:
 356                         case S_INT:
 357                         case S_HEX:
 358                                 if (!sym_string_within_range(sym, sym->user.val)) {
 359                                         sym->flags |= SYMBOL_NEW;
 360                                         sym->flags &= ~SYMBOL_VALID;
 361                                 }
 362                         default:
 363                                 break;
 364                         }
 365                 }
 366                 if (!sym_is_choice(sym))
 367                         continue;
 368                 prop = sym_get_choice_prop(sym);
 369                 for (e = prop->expr; e; e = e->left.expr)
 370                         if (e->right.sym->visible != no)
 371                                 sym->flags |= e->right.sym->flags & SYMBOL_NEW;
 372         }
 373
 374         sym_change_count = conf_warnings && conf_unsaved;
 375
 376         return 0;
 377 }
 378
 379 int conf_write(const char *name)
 380 {
 381         FILE *out;
 382         struct symbol *sym;
 383         struct menu *menu;
 384         const char *basename;
 385         char dirname[128], tmpname[128], newname[128];
 386         int type, l;
 387         const char *str;
 388         time_t now;
 389         int use_timestamp = 1;
 390         char *env;
 391
 392         dirname[0] = 0;
 393         if (name && name[0]) {
 394                 struct stat st;
 395                 char *slash;
 396
 397                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 398                         strcpy(dirname, name);
 399                         strcat(dirname, "/");
 400                         basename = conf_def_filename;
 401                 } else if ((slash = strrchr(name, '/'))) {
 402                         int size = slash - name + 1;
 403                         memcpy(dirname, name, size);
 404                         dirname[size] = 0;
 405                         if (slash[1])
 406                                 basename = slash + 1;
 407                         else
 408                                 basename = conf_def_filename;
 409                 } else
 410                         basename = name;
 411         } else
 412                 basename = conf_def_filename;
 413
 414         sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
 415         out = fopen(newname, "w");
 416         if (!out)
 417                 return 1;
 418         sym = sym_lookup("OPENWRTVERSION", 0);
 419         sym_calc_value(sym);
 420         time(&now);
 421         env = getenv("KCONFIG_NOTIMESTAMP");
 422         if (env && *env)
 423                 use_timestamp = 0;
 424
 425         fprintf(out, _("#\n"
 426                        "# Automatically generated make config: don't edit\n"
 427                        "# OpenWrt version: %s\n"
 428                        "%s%s"
 429                        "#\n"),
 430                      sym_get_string_value(sym),
 431                      use_timestamp ? "# " : "",
 432                      use_timestamp ? ctime(&now) : "");
 433
 434         if (!sym_change_count)
 435                 sym_clear_all_valid();
 436
 437         menu = rootmenu.list;
 438         while (menu) {
 439                 sym = menu->sym;
 440                 if (!sym) {
 441                         if (!menu_is_visible(menu))
 442                                 goto next;
 443                         str = menu_get_prompt(menu);
 444                         fprintf(out, "\n"
 445                                      "#\n"
 446                                      "# %s\n"
 447                                      "#\n", str);
 448                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 449                         sym_calc_value(sym);
 450                         if (!(sym->flags & SYMBOL_WRITE))
 451                                 goto next;
 452                         sym->flags &= ~SYMBOL_WRITE;
 453                         type = sym->type;
 454                         if (type == S_TRISTATE) {
 455                                 sym_calc_value(modules_sym);
 456 /* tristate always enabled */
 457 #if 0
 458                                 if (modules_sym->curr.tri == no)
 459                                         type = S_BOOLEAN;
 460 #endif
 461                         }
 462                         switch (type) {
 463                         case S_BOOLEAN:
 464                         case S_TRISTATE:
 465                                 switch (sym_get_tristate_value(sym)) {
 466                                 case no:
 467                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 468                                         break;
 469                                 case mod:
 470                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
 471                                         break;
 472                                 case yes:
 473                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
 474                                         break;
 475                                 }
 476                                 break;
 477                         case S_STRING:
 478                                 // fix me
 479                                 str = sym_get_string_value(sym);
 480                                 fprintf(out, "CONFIG_%s=\"", sym->name);
 481                                 do {
 482                                         l = strcspn(str, "\"\\");
 483                                         if (l) {
 484                                                 fwrite(str, l, 1, out);
 485                                         }
 486                                         str += l;
 487                                         while (*str == '\\' || *str == '"') {
 488                                                 fprintf(out, "\\%c", *str);
 489                                                 str++;
 490                                         }
 491                                 } while (*str);
 492                                 fputs("\"\n", out);
 493                                 break;
 494                         case S_HEX:
 495                                 str = sym_get_string_value(sym);
 496                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 497                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 498                                         break;
 499                                 }
 500                         case S_INT:
 501                                 str = sym_get_string_value(sym);
 502                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 503                                 break;
 504                         }
 505                 }
 506
 507         next:
 508                 if (menu->list) {
 509                         menu = menu->list;
 510                         continue;
 511                 }
 512                 if (menu->next)
 513                         menu = menu->next;
 514                 else while ((menu = menu->parent)) {
 515                         if (menu->next) {
 516                                 menu = menu->next;
 517                                 break;
 518                         }
 519                 }
 520         }
 521         fclose(out);
 522         if (!name || basename != conf_def_filename) {
 523                 if (!name)
 524                         name = conf_def_filename;
 525                 sprintf(tmpname, "%s.old", name);
 526                 rename(name, tmpname);
 527         }
 528         sprintf(tmpname, "%s%s", dirname, basename);
 529         if (rename(newname, tmpname))
 530                 return 1;
 531
 532         sym_change_count = 0;
 533
 534         return 0;
 535 }