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/$ARCH/defconfig";
  26
  27 const char *conf_confnames[] = {
  28         ".config",
  29         conf_defname,
  30         NULL,
  31 };
  32
  33 static void conf_warning(const char *fmt, ...)
  34 {
  35         va_list ap;
  36         va_start(ap, fmt);
  37         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
  38         vfprintf(stderr, fmt, ap);
  39         fprintf(stderr, "\n");
  40         va_end(ap);
  41         conf_warnings++;
  42 }
  43
  44 static char *conf_expand_value(const char *in)
  45 {
  46         struct symbol *sym;
  47         const char *src;
  48         static char res_value[SYMBOL_MAXLENGTH];
  49         char *dst, name[SYMBOL_MAXLENGTH];
  50
  51         res_value[0] = 0;
  52         dst = name;
  53         while ((src = strchr(in, '$'))) {
  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 int conf_read_simple(const char *name)
  87 {
  88         FILE *in = NULL;
  89         char line[1024];
  90         char *p, *p2;
  91         struct symbol *sym;
  92         int i;
  93
  94         if (name) {
  95                 in = zconf_fopen(name);
  96         } else {
  97                 const char **names = conf_confnames;
  98                 while ((name = *names++)) {
  99                         name = conf_expand_value(name);
 100                         in = zconf_fopen(name);
 101                         if (in) {
 102                                 printf(_("#\n"
 103                                          "# using defaults found in %s\n"
 104                                          "#\n"), name);
 105                                 break;
 106                         }
 107                 }
 108         }
 109         if (!in)
 110                 return 1;
 111
 112         conf_filename = name;
 113         conf_lineno = 0;
 114         conf_warnings = 0;
 115         conf_unsaved = 0;
 116
 117         for_all_symbols(i, sym) {
 118                 sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
 119                 if (sym_is_choice(sym))
 120                         sym->flags &= ~SYMBOL_NEW;
 121                 sym->flags &= ~SYMBOL_VALID;
 122                 switch (sym->type) {
 123                 case S_INT:
 124                 case S_HEX:
 125                 case S_STRING:
 126                         if (sym->user.val)
 127                                 free(sym->user.val);
 128                 default:
 129                         sym->user.val = NULL;
 130                         sym->user.tri = no;
 131                 }
 132         }
 133
 134         while (fgets(line, sizeof(line), in)) {
 135                 conf_lineno++;
 136                 sym = NULL;
 137                 switch (line[0]) {
 138                 case '#':
 139                         if (memcmp(line + 2, "CONFIG_", 7))
 140                                 continue;
 141                         p = strchr(line + 9, ' ');
 142                         if (!p)
 143                                 continue;
 144                         *p++ = 0;
 145                         if (strncmp(p, "is not set", 10))
 146                                 continue;
 147                         sym = sym_find(line + 9);
 148                         if (!sym) {
 149                                 conf_warning("trying to assign nonexistent symbol %s", line + 9);
 150                                 break;
 151                         } else if (!(sym->flags & SYMBOL_NEW)) {
 152                                 conf_warning("trying to reassign symbol %s", sym->name);
 153                                 break;
 154                         }
 155                         switch (sym->type) {
 156                         case S_BOOLEAN:
 157                         case S_TRISTATE:
 158                                 sym->user.tri = no;
 159                                 sym->flags &= ~SYMBOL_NEW;
 160                                 break;
 161                         default:
 162                                 ;
 163                         }
 164                         break;
 165                 case 'C':
 166                         if (memcmp(line, "CONFIG_", 7)) {
 167                                 conf_warning("unexpected data");
 168                                 continue;
 169                         }
 170                         p = strchr(line + 7, '=');
 171                         if (!p)
 172                                 continue;
 173                         *p++ = 0;
 174                         p2 = strchr(p, '\n');
 175                         if (p2)
 176                                 *p2 = 0;
 177                         sym = sym_find(line + 7);
 178                         if (!sym) {
 179                                 conf_warning("trying to assign nonexistent symbol %s", line + 7);
 180                                 break;
 181                         } else if (!(sym->flags & SYMBOL_NEW)) {
 182                                 conf_warning("trying to reassign symbol %s", sym->name);
 183                                 break;
 184                         }
 185                         switch (sym->type) {
 186                         case S_TRISTATE:
 187                                 if (p[0] == 'm') {
 188                                         sym->user.tri = mod;
 189                                         sym->flags &= ~SYMBOL_NEW;
 190                                         break;
 191                                 }
 192                         case S_BOOLEAN:
 193                                 if (p[0] == 'y') {
 194                                         sym->user.tri = yes;
 195                                         sym->flags &= ~SYMBOL_NEW;
 196                                         break;
 197                                 }
 198                                 if (p[0] == 'n') {
 199                                         sym->user.tri = no;
 200                                         sym->flags &= ~SYMBOL_NEW;
 201                                         break;
 202                                 }
 203                                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 204                                 break;
 205                         case S_STRING:
 206                                 if (*p++ != '"')
 207                                         break;
 208                                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 209                                         if (*p2 == '"') {
 210                                                 *p2 = 0;
 211                                                 break;
 212                                         }
 213                                         memmove(p2, p2 + 1, strlen(p2));
 214                                 }
 215                                 if (!p2) {
 216                                         conf_warning("invalid string found");
 217                                         continue;
 218                                 }
 219                         case S_INT:
 220                         case S_HEX:
 221                                 if (sym_string_valid(sym, p)) {
 222                                         sym->user.val = strdup(p);
 223                                         sym->flags &= ~SYMBOL_NEW;
 224                                 } else {
 225                                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 226                                         continue;
 227                                 }
 228                                 break;
 229                         default:
 230                                 ;
 231                         }
 232                         break;
 233                 case '\n':
 234                         break;
 235                 default:
 236                         conf_warning("unexpected data");
 237                         continue;
 238                 }
 239                 if (sym && sym_is_choice_value(sym)) {
 240                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 241                         switch (sym->user.tri) {
 242                         case no:
 243                                 break;
 244                         case mod:
 245                                 if (cs->user.tri == yes) {
 246                                         conf_warning("%s creates inconsistent choice state", sym->name);
 247                                         cs->flags |= SYMBOL_NEW;
 248                                 }
 249                                 break;
 250                         case yes:
 251                                 if (cs->user.tri != no) {
 252                                         conf_warning("%s creates inconsistent choice state", sym->name);
 253                                         cs->flags |= SYMBOL_NEW;
 254                                 } else
 255                                         cs->user.val = sym;
 256                                 break;
 257                         }
 258                         cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
 259                 }
 260         }
 261         fclose(in);
 262
 263         if (modules_sym)
 264                 sym_calc_value(modules_sym);
 265         return 0;
 266 }
 267
 268 int conf_read(const char *name)
 269 {
 270         struct symbol *sym;
 271         struct property *prop;
 272         struct expr *e;
 273         int i;
 274
 275         if (conf_read_simple(name))
 276                 return 1;
 277
 278         for_all_symbols(i, sym) {
 279                 sym_calc_value(sym);
 280                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 281                         goto sym_ok;
 282                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 283                         /* check that calculated value agrees with saved value */
 284                         switch (sym->type) {
 285                         case S_BOOLEAN:
 286                         case S_TRISTATE:
 287                                 if (sym->user.tri != sym_get_tristate_value(sym))
 288                                         break;
 289                                 if (!sym_is_choice(sym))
 290                                         goto sym_ok;
 291                         default:
 292                                 if (!strcmp(sym->curr.val, sym->user.val))
 293                                         goto sym_ok;
 294                                 break;
 295                         }
 296                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 297                         /* no previous value and not saved */
 298                         goto sym_ok;
 299                 conf_unsaved++;
 300                 /* maybe print value in verbose mode... */
 301         sym_ok:
 302                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 303                         if (sym->visible == no)
 304                                 sym->flags |= SYMBOL_NEW;
 305                         switch (sym->type) {
 306                         case S_STRING:
 307                         case S_INT:
 308                         case S_HEX:
 309                                 if (!sym_string_within_range(sym, sym->user.val)) {
 310                                         sym->flags |= SYMBOL_NEW;
 311                                         sym->flags &= ~SYMBOL_VALID;
 312                                 }
 313                         default:
 314                                 break;
 315                         }
 316                 }
 317                 if (!sym_is_choice(sym))
 318                         continue;
 319                 prop = sym_get_choice_prop(sym);
 320                 for (e = prop->expr; e; e = e->left.expr)
 321                         if (e->right.sym->visible != no)
 322                                 sym->flags |= e->right.sym->flags & SYMBOL_NEW;
 323         }
 324
 325         sym_change_count = conf_warnings || conf_unsaved;
 326
 327         return 0;
 328 }
 329
 330 int conf_write(const char *name)
 331 {
 332         FILE *out, *out_h;
 333         struct symbol *sym;
 334         struct menu *menu;
 335         const char *basename;
 336         char dirname[128], tmpname[128], newname[128];
 337         int type, l;
 338         const char *str;
 339         time_t now;
 340         int use_timestamp = 1;
 341         char *env;
 342
 343         dirname[0] = 0;
 344         if (name && name[0]) {
 345                 struct stat st;
 346                 char *slash;
 347
 348                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 349                         strcpy(dirname, name);
 350                         strcat(dirname, "/");
 351                         basename = conf_def_filename;
 352                 } else if ((slash = strrchr(name, '/'))) {
 353                         int size = slash - name + 1;
 354                         memcpy(dirname, name, size);
 355                         dirname[size] = 0;
 356                         if (slash[1])
 357                                 basename = slash + 1;
 358                         else
 359                                 basename = conf_def_filename;
 360                 } else
 361                         basename = name;
 362         } else
 363                 basename = conf_def_filename;
 364
 365         sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
 366         out = fopen(newname, "w");
 367         if (!out)
 368                 return 1;
 369         out_h = NULL;
 370         if (!name) {
 371                 out_h = fopen(".tmpconfig.h", "w");
 372                 if (!out_h)
 373                         return 1;
 374                 file_write_dep(NULL);
 375         }
 376         sym = sym_lookup("KERNELVERSION", 0);
 377         sym_calc_value(sym);
 378         time(&now);
 379         env = getenv("KCONFIG_NOTIMESTAMP");
 380         if (env && *env)
 381                 use_timestamp = 0;
 382
 383         fprintf(out, _("#\n"
 384                        "# Automatically generated make config: don't edit\n"
 385                        "#Palacios: %s\n"
 386                        "%s%s"
 387                        "#\n"),
 388                      sym_get_string_value(sym),
 389                      use_timestamp ? "# " : "",
 390                      use_timestamp ? ctime(&now) : "");
 391         if (out_h)
 392                 fprintf(out_h, "/*\n"
 393                                " * Automatically generated C config: don't edit\n"
 394                                " * Palacios version: %s\n"
 395                                "%s%s"
 396                                " */\n"
 397                                "#define AUTOCONF_INCLUDED\n",
 398                                sym_get_string_value(sym),
 399                                use_timestamp ? " * " : "",
 400                                use_timestamp ? ctime(&now) : "");
 401
 402         if (!sym_change_count)
 403                 sym_clear_all_valid();
 404
 405         menu = rootmenu.list;
 406         while (menu) {
 407                 sym = menu->sym;
 408                 if (!sym) {
 409                         if (!menu_is_visible(menu))
 410                                 goto next;
 411                         str = menu_get_prompt(menu);
 412                         fprintf(out, "\n"
 413                                      "#\n"
 414                                      "# %s\n"
 415                                      "#\n", str);
 416                         if (out_h)
 417                                 fprintf(out_h, "\n"
 418                                                "/*\n"
 419                                                " * %s\n"
 420                                                " */\n", str);
 421                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 422                         sym_calc_value(sym);
 423                         if (!(sym->flags & SYMBOL_WRITE))
 424                                 goto next;
 425                         sym->flags &= ~SYMBOL_WRITE;
 426                         type = sym->type;
 427                         if (type == S_TRISTATE) {
 428                                 sym_calc_value(modules_sym);
 429                                 if (modules_sym->curr.tri == no)
 430                                         type = S_BOOLEAN;
 431                         }
 432                         switch (type) {
 433                         case S_BOOLEAN:
 434                         case S_TRISTATE:
 435                                 switch (sym_get_tristate_value(sym)) {
 436                                 case no:
 437                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 438                                         if (out_h)
 439                                                 fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
 440                                         break;
 441                                 case mod:
 442                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
 443                                         if (out_h)
 444                                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 445                                         break;
 446                                 case yes:
 447                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
 448                                         if (out_h)
 449                                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
 450                                         break;
 451                                 }
 452                                 break;
 453                         case S_STRING:
 454                                 // fix me
 455                                 str = sym_get_string_value(sym);
 456                                 fprintf(out, "CONFIG_%s=\"", sym->name);
 457                                 if (out_h)
 458                                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
 459                                 do {
 460                                         l = strcspn(str, "\"\\");
 461                                         if (l) {
 462                                                 fwrite(str, l, 1, out);
 463                                                 if (out_h)
 464                                                         fwrite(str, l, 1, out_h);
 465                                         }
 466                                         str += l;
 467                                         while (*str == '\\' || *str == '"') {
 468                                                 fprintf(out, "\\%c", *str);
 469                                                 if (out_h)
 470                                                         fprintf(out_h, "\\%c", *str);
 471                                                 str++;
 472                                         }
 473                                 } while (*str);
 474                                 fputs("\"\n", out);
 475                                 if (out_h)
 476                                         fputs("\"\n", out_h);
 477                                 break;
 478                         case S_HEX:
 479                                 str = sym_get_string_value(sym);
 480                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 481                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 482                                         if (out_h)
 483                                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 484                                         break;
 485                                 }
 486                         case S_INT:
 487                                 str = sym_get_string_value(sym);
 488                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 489                                 if (out_h)
 490                                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
 491                                 break;
 492                         }
 493                 }
 494
 495         next:
 496                 if (menu->list) {
 497                         menu = menu->list;
 498                         continue;
 499                 }
 500                 if (menu->next)
 501                         menu = menu->next;
 502                 else while ((menu = menu->parent)) {
 503                         if (menu->next) {
 504                                 menu = menu->next;
 505                                 break;
 506                         }
 507                 }
 508         }
 509         fclose(out);
 510         if (out_h) {
 511                 fclose(out_h);
 512                 rename(".tmpconfig.h", "palacios/include/autoconf.h");
 513         }
 514         if (!name || basename != conf_def_filename) {
 515                 if (!name)
 516                         name = conf_def_filename;
 517                 sprintf(tmpname, "%s.old", name);
 518                 rename(name, tmpname);
 519         }
 520         sprintf(tmpname, "%s%s", dirname, basename);
 521         if (rename(newname, tmpname))
 522                 return 1;
 523
 524         sym_change_count = 0;
 525
 526         return 0;
 527 }