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