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 const char conf_def_filename[] = ".config";
  18
  19 const char conf_defname[] = "arch/$ARCH/defconfig";
  20
  21 const char *conf_confnames[] = {
  22         ".config",
  23         "/lib/modules/$UNAME_RELEASE/.config",
  24         "/etc/kernel-config",
  25         "/boot/config-$UNAME_RELEASE",
  26         conf_defname,
  27         NULL,
  28 };
  29
  30 static char *conf_expand_value(const signed char *in)
  31 {
  32         struct symbol *sym;
  33         const signed char *src;
  34         static char res_value[SYMBOL_MAXLENGTH];
  35         char *dst, name[SYMBOL_MAXLENGTH];
  36
  37         res_value[0] = 0;
  38         dst = name;
  39         while ((src = strchr(in, '$'))) {
  40                 strncat(res_value, in, src - in);
  41                 src++;
  42                 dst = name;
  43                 while (isalnum(*src) || *src == '_')
  44                         *dst++ = *src++;
  45                 *dst = 0;
  46                 sym = sym_lookup(name, 0);
  47                 sym_calc_value(sym);
  48                 strcat(res_value, sym_get_string_value(sym));
  49                 in = src;
  50         }
  51         strcat(res_value, in);
  52
  53         return res_value;
  54 }
  55
  56 char *conf_get_default_confname(void)
  57 {
  58         struct stat buf;
  59         static char fullname[PATH_MAX+1];
  60         char *env, *name;
  61
  62         name = conf_expand_value(conf_defname);
  63         env = getenv(SRCTREE);
  64         if (env) {
  65                 sprintf(fullname, "%s/%s", env, name);
  66                 if (!stat(fullname, &buf))
  67                         return fullname;
  68         }
  69         return name;
  70 }
  71
  72 int conf_read(const char *name)
  73 {
  74         FILE *in = NULL;
  75         char line[1024];
  76         char *p, *p2;
  77         int lineno = 0;
  78         struct symbol *sym;
  79         struct property *prop;
  80         struct expr *e;
  81         int i;
  82
  83         if (name) {
  84                 in = zconf_fopen(name);
  85         } else {
  86                 const char **names = conf_confnames;
  87                 while ((name = *names++)) {
  88                         name = conf_expand_value(name);
  89                         in = zconf_fopen(name);
  90                         if (in) {
  91                                 printf("#\n"
  92                                        "# using defaults found in %s\n"
  93                                        "#\n", name);
  94                                 break;
  95                         }
  96                 }
  97         }
  98
  99         if (!in)
 100                 return 1;
 101
 102         for_all_symbols(i, sym) {
 103                 sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
 104                 sym->flags &= ~SYMBOL_VALID;
 105                 switch (sym->type) {
 106                 case S_INT:
 107                 case S_HEX:
 108                 case S_STRING:
 109                         if (sym->user.val)
 110                                 free(sym->user.val);
 111                 default:
 112                         sym->user.val = NULL;
 113                         sym->user.tri = no;
 114                 }
 115         }
 116
 117         while (fgets(line, sizeof(line), in)) {
 118                 lineno++;
 119                 sym = NULL;
 120                 switch (line[0]) {
 121                 case '#':
 122                         if (memcmp(line + 2, "CONFIG_", 7))
 123                                 continue;
 124                         p = strchr(line + 9, ' ');
 125                         if (!p)
 126                                 continue;
 127                         *p++ = 0;
 128                         if (strncmp(p, "is not set", 10))
 129                                 continue;
 130                         sym = sym_find(line + 9);
 131                         if (!sym) {
 132                                 fprintf(stderr, "%s:%d: trying to assign nonexistent symbol %s\n", name, lineno, line + 9);
 133                                 break;
 134                         }
 135                         switch (sym->type) {
 136                         case S_BOOLEAN:
 137                         case S_TRISTATE:
 138                                 sym->user.tri = no;
 139                                 sym->flags &= ~SYMBOL_NEW;
 140                                 break;
 141                         default:
 142                                 ;
 143                         }
 144                         break;
 145                 case 'C':
 146                         if (memcmp(line, "CONFIG_", 7))
 147                                 continue;
 148                         p = strchr(line + 7, '=');
 149                         if (!p)
 150                                 continue;
 151                         *p++ = 0;
 152                         p2 = strchr(p, '\n');
 153                         if (p2)
 154                                 *p2 = 0;
 155                         sym = sym_find(line + 7);
 156                         if (!sym) {
 157                                 fprintf(stderr, "%s:%d: trying to assign nonexistent symbol %s\n", name, lineno, line + 7);
 158                                 break;
 159                         }
 160                         switch (sym->type) {
 161                         case S_TRISTATE:
 162                                 if (p[0] == 'm') {
 163                                         sym->user.tri = mod;
 164                                         sym->flags &= ~SYMBOL_NEW;
 165                                         break;
 166                                 }
 167                         case S_BOOLEAN:
 168                                 if (p[0] == 'y') {
 169                                         sym->user.tri = yes;
 170                                         sym->flags &= ~SYMBOL_NEW;
 171                                         break;
 172                                 }
 173                                 if (p[0] == 'n') {
 174                                         sym->user.tri = no;
 175                                         sym->flags &= ~SYMBOL_NEW;
 176                                         break;
 177                                 }
 178                                 break;
 179                         case S_STRING:
 180                                 if (*p++ != '"')
 181                                         break;
 182                                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 183                                         if (*p2 == '"') {
 184                                                 *p2 = 0;
 185                                                 break;
 186                                         }
 187                                         memmove(p2, p2 + 1, strlen(p2));
 188                                 }
 189                                 if (!p2) {
 190                                         fprintf(stderr, "%s:%d: invalid string found\n", name, lineno);
 191                                         exit(1);
 192                                 }
 193                         case S_INT:
 194                         case S_HEX:
 195                                 if (sym_string_valid(sym, p)) {
 196                                         sym->user.val = strdup(p);
 197                                         sym->flags &= ~SYMBOL_NEW;
 198                                 } else {
 199                                         fprintf(stderr, "%s:%d: symbol value '%s' invalid for %s\n", name, lineno, p, sym->name);
 200                                         exit(1);
 201                                 }
 202                                 break;
 203                         default:
 204                                 ;
 205                         }
 206                         break;
 207                 case '\n':
 208                         break;
 209                 default:
 210                         continue;
 211                 }
 212                 if (sym && sym_is_choice_value(sym)) {
 213                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 214                         switch (sym->user.tri) {
 215                         case no:
 216                                 break;
 217                         case mod:
 218                                 if (cs->user.tri == yes)
 219                                         /* warn? */;
 220                                 break;
 221                         case yes:
 222                                 if (cs->user.tri != no)
 223                                         /* warn? */;
 224                                 cs->user.val = sym;
 225                                 break;
 226                         }
 227                         cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
 228                         cs->flags &= ~SYMBOL_NEW;
 229                 }
 230         }
 231         fclose(in);
 232
 233         if (modules_sym)
 234                 sym_calc_value(modules_sym);
 235         for_all_symbols(i, sym) {
 236                 sym_calc_value(sym);
 237                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 238                         if (sym->visible == no)
 239                                 sym->flags |= SYMBOL_NEW;
 240                         switch (sym->type) {
 241                         case S_STRING:
 242                         case S_INT:
 243                         case S_HEX:
 244                                 if (!sym_string_within_range(sym, sym->user.val))
 245                                         sym->flags |= SYMBOL_NEW;
 246                         default:
 247                                 break;
 248                         }
 249                 }
 250                 if (!sym_is_choice(sym))
 251                         continue;
 252                 prop = sym_get_choice_prop(sym);
 253                 for (e = prop->expr; e; e = e->left.expr)
 254                         if (e->right.sym->visible != no)
 255                                 sym->flags |= e->right.sym->flags & SYMBOL_NEW;
 256         }
 257
 258         sym_change_count = 1;
 259
 260         return 0;
 261 }
 262
 263 int conf_write(const char *name)
 264 {
 265         FILE *out, *out_h;
 266         struct symbol *sym;
 267         struct menu *menu;
 268         const char *basename;
 269         char dirname[128], tmpname[128], newname[128];
 270         int type, l;
 271         const char *str;
 272         time_t now;
 273         int use_timestamp = 1;
 274         char *env;
 275
 276         dirname[0] = 0;
 277         if (name && name[0]) {
 278                 struct stat st;
 279                 char *slash;
 280
 281                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 282                         strcpy(dirname, name);
 283                         strcat(dirname, "/");
 284                         basename = conf_def_filename;
 285                 } else if ((slash = strrchr(name, '/'))) {
 286                         int size = slash - name + 1;
 287                         memcpy(dirname, name, size);
 288                         dirname[size] = 0;
 289                         if (slash[1])
 290                                 basename = slash + 1;
 291                         else
 292                                 basename = conf_def_filename;
 293                 } else
 294                         basename = name;
 295         } else
 296                 basename = conf_def_filename;
 297
 298         sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
 299         out = fopen(newname, "w");
 300         if (!out)
 301                 return 1;
 302         out_h = NULL;
 303         if (!name) {
 304                 out_h = fopen(".tmpconfig.h", "w");
 305                 if (!out_h)
 306                         return 1;
 307         }
 308         sym = sym_lookup("KERNELRELEASE", 0);
 309         sym_calc_value(sym);
 310         time(&now);
 311         env = getenv("KCONFIG_NOTIMESTAMP");
 312         if (env && *env)
 313                 use_timestamp = 0;
 314
 315         fprintf(out, "#\n"
 316                      "# Automatically generated make config: don't edit\n"
 317                      "# Linux kernel version: %s\n"
 318                      "%s%s"
 319                      "#\n",
 320                      sym_get_string_value(sym),
 321                      use_timestamp ? "# " : "",
 322                      use_timestamp ? ctime(&now) : "");
 323         if (out_h)
 324                 fprintf(out_h, "/*\n"
 325                                " * Automatically generated C config: don't edit\n"
 326                                " * Linux kernel version: %s\n"
 327                                "%s%s"
 328                                " */\n"
 329                                "#define AUTOCONF_INCLUDED\n",
 330                                sym_get_string_value(sym),
 331                                use_timestamp ? " * " : "",
 332                                use_timestamp ? ctime(&now) : "");
 333
 334         if (!sym_change_count)
 335                 sym_clear_all_valid();
 336
 337         menu = rootmenu.list;
 338         while (menu) {
 339                 sym = menu->sym;
 340                 if (!sym) {
 341                         if (!menu_is_visible(menu))
 342                                 goto next;
 343                         str = menu_get_prompt(menu);
 344                         fprintf(out, "\n"
 345                                      "#\n"
 346                                      "# %s\n"
 347                                      "#\n", str);
 348                         if (out_h)
 349                                 fprintf(out_h, "\n"
 350                                                "/*\n"
 351                                                " * %s\n"
 352                                                " */\n", str);
 353                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 354                         sym_calc_value(sym);
 355                         if (!(sym->flags & SYMBOL_WRITE))
 356                                 goto next;
 357                         sym->flags &= ~SYMBOL_WRITE;
 358                         type = sym->type;
 359                         if (type == S_TRISTATE) {
 360                                 sym_calc_value(modules_sym);
 361                                 if (modules_sym->curr.tri == no)
 362                                         type = S_BOOLEAN;
 363                         }
 364                         switch (type) {
 365                         case S_BOOLEAN:
 366                         case S_TRISTATE:
 367                                 switch (sym_get_tristate_value(sym)) {
 368                                 case no:
 369                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 370                                         if (out_h)
 371                                                 fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
 372                                         break;
 373                                 case mod:
 374                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
 375                                         if (out_h)
 376                                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 377                                         break;
 378                                 case yes:
 379                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
 380                                         if (out_h)
 381                                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
 382                                         break;
 383                                 }
 384                                 break;
 385                         case S_STRING:
 386                                 // fix me
 387                                 str = sym_get_string_value(sym);
 388                                 fprintf(out, "CONFIG_%s=\"", sym->name);
 389                                 if (out_h)
 390                                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
 391                                 do {
 392                                         l = strcspn(str, "\"\\");
 393                                         if (l) {
 394                                                 fwrite(str, l, 1, out);
 395                                                 if (out_h)
 396                                                         fwrite(str, l, 1, out_h);
 397                                         }
 398                                         str += l;
 399                                         while (*str == '\\' || *str == '"') {
 400                                                 fprintf(out, "\\%c", *str);
 401                                                 if (out_h)
 402                                                         fprintf(out_h, "\\%c", *str);
 403                                                 str++;
 404                                         }
 405                                 } while (*str);
 406                                 fputs("\"\n", out);
 407                                 if (out_h)
 408                                         fputs("\"\n", out_h);
 409                                 break;
 410                         case S_HEX:
 411                                 str = sym_get_string_value(sym);
 412                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 413                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 414                                         if (out_h)
 415                                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 416                                         break;
 417                                 }
 418                         case S_INT:
 419                                 str = sym_get_string_value(sym);
 420                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 421                                 if (out_h)
 422                                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
 423                                 break;
 424                         }
 425                 }
 426
 427         next:
 428                 if (menu->list) {
 429                         menu = menu->list;
 430                         continue;
 431                 }
 432                 if (menu->next)
 433                         menu = menu->next;
 434                 else while ((menu = menu->parent)) {
 435                         if (menu->next) {
 436                                 menu = menu->next;
 437                                 break;
 438                         }
 439                 }
 440         }
 441         fclose(out);
 442         if (out_h) {
 443                 fclose(out_h);
 444                 rename(".tmpconfig.h", "include/linux/autoconf.h");
 445                 file_write_dep(NULL);
 446         }
 447         if (!name || basename != conf_def_filename) {
 448                 if (!name)
 449                         name = conf_def_filename;
 450                 sprintf(tmpname, "%s.old", name);
 451                 rename(name, tmpname);
 452         }
 453         sprintf(tmpname, "%s%s", dirname, basename);
 454         if (rename(newname, tmpname))
 455                 return 1;
 456
 457         sym_change_count = 0;
 458
 459         return 0;
 460 }