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