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 <unistd.h>
  12
  13 #define LKC_DIRECT_LINK
  14 #include "lkc.h"
  15
  16 const char conf_def_filename[] = ".config";
  17
  18 const char conf_defname[] = "sysdeps/linux/defconfig";
  19
  20 const char *conf_confnames[] = {
  21         ".config",
  22         conf_defname,
  23         NULL,
  24 };
  25
  26 static char *conf_expand_value(const char *in)
  27 {
  28         struct symbol *sym;
  29         const char *src;
  30         static char res_value[SYMBOL_MAXLENGTH];
  31         char *dst, name[SYMBOL_MAXLENGTH];
  32
  33         res_value[0] = 0;
  34         dst = name;
  35         while ((src = strchr(in, '$'))) {
  36                 strncat(res_value, in, src - in);
  37                 src++;
  38                 dst = name;
  39                 while (isalnum(*src) || *src == '_')
  40                         *dst++ = *src++;
  41                 *dst = 0;
  42                 sym = sym_lookup(name, 0);
  43                 sym_calc_value(sym);
  44                 strcat(res_value, sym_get_string_value(sym));
  45                 in = src;
  46         }
  47         strcat(res_value, in);
  48
  49         return res_value;
  50 }
  51
  52 char *conf_get_default_confname(void)
  53 {
  54         struct stat buf;
  55         static char fullname[4096+1];
  56         char *env, *name;
  57
  58         name = conf_expand_value(conf_defname);
  59         env = getenv(SRCTREE);
  60         if (env) {
  61                 sprintf(fullname, "%s/%s", env, name);
  62                 if (!stat(fullname, &buf))
  63                         return fullname;
  64         }
  65         return name;
  66 }
  67
  68 int conf_read(const char *name)
  69 {
  70         FILE *in = NULL;
  71         char line[1024];
  72         char *p, *p2;
  73         int lineno = 0;
  74         struct symbol *sym;
  75         struct property *prop;
  76         struct expr *e;
  77         int i;
  78
  79         if (name) {
  80                 in = zconf_fopen(name);
  81         } else {
  82                 const char **names = conf_confnames;
  83                 while ((name = *names++)) {
  84                         name = conf_expand_value(name);
  85                         in = zconf_fopen(name);
  86                         if (in) {
  87                                 printf("#\n"
  88                                        "# using defaults found in %s\n"
  89                                        "#\n", name);
  90                                 break;
  91                         }
  92                 }
  93         }
  94
  95         if (!in)
  96                 return 1;
  97
  98         for_all_symbols(i, sym) {
  99                 sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
 100                 sym->flags &= ~SYMBOL_VALID;
 101                 switch (sym->type) {
 102                 case S_INT:
 103                 case S_HEX:
 104                 case S_STRING:
 105                         if (sym->user.val)
 106                                 free(sym->user.val);
 107                 default:
 108                         sym->user.val = NULL;
 109                         sym->user.tri = no;
 110                 }
 111         }
 112
 113         while (fgets(line, sizeof(line), in)) {
 114                 lineno++;
 115                 sym = NULL;
 116                 switch (line[0]) {
 117                 case '#':
 118                         if (line[1]!=' ')
 119                                 continue;
 120                         p = strchr(line + 2, ' ');
 121                         if (!p)
 122                                 continue;
 123                         *p++ = 0;
 124                         if (strncmp(p, "is not set", 10))
 125                                 continue;
 126                         sym = sym_find(line + 2);
 127                         if (!sym) {
 128                                 fprintf(stderr, "%s:%d: trying to assign nonexistent symbol %s\n", name, lineno, line + 2);
 129                                 break;
 130                         }
 131                         switch (sym->type) {
 132                         case S_BOOLEAN:
 133                         case S_TRISTATE:
 134                                 sym->user.tri = no;
 135                                 sym->flags &= ~SYMBOL_NEW;
 136                                 break;
 137                         default:
 138                                 ;
 139                         }
 140                         break;
 141
 142                 case 'A' ... 'Z':
 143                         p = strchr(line, '=');
 144                         if (!p)
 145                                 continue;
 146                         *p++ = 0;
 147                         p2 = strchr(p, '\n');
 148                         if (p2)
 149                                 *p2 = 0;
 150                         sym = sym_find(line);
 151                         if (!sym) {
 152                                 fprintf(stderr, "%s:%d: trying to assign nonexistent symbol %s\n", name, lineno, line);
 153                                 break;
 154                         }
 155                         switch (sym->type) {
 156                         case S_TRISTATE:
 157                                 if (p[0] == 'm') {
 158                                         sym->user.tri = mod;
 159                                         sym->flags &= ~SYMBOL_NEW;
 160                                         break;
 161                                 }
 162                         case S_BOOLEAN:
 163                                 if (p[0] == 'y') {
 164                                         sym->user.tri = yes;
 165                                         sym->flags &= ~SYMBOL_NEW;
 166                                         break;
 167                                 }
 168                                 if (p[0] == 'n') {
 169                                         sym->user.tri = no;
 170                                         sym->flags &= ~SYMBOL_NEW;
 171                                         break;
 172                                 }
 173                                 break;
 174                         case S_STRING:
 175                                 if (*p++ != '"')
 176                                         break;
 177                                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 178                                         if (*p2 == '"') {
 179                                                 *p2 = 0;
 180                                                 break;
 181                                         }
 182                                         memmove(p2, p2 + 1, strlen(p2));
 183                                 }
 184                                 if (!p2) {
 185                                         fprintf(stderr, "%s:%d: invalid string found\n", name, lineno);
 186                                         exit(1);
 187                                 }
 188                         case S_INT:
 189                         case S_HEX:
 190                                 if (sym_string_valid(sym, p)) {
 191                                         sym->user.val = strdup(p);
 192                                         sym->flags &= ~SYMBOL_NEW;
 193                                 } else {
 194                                         fprintf(stderr, "%s:%d: symbol value '%s' invalid for %s\n", name, lineno, p, sym->name);
 195                                         exit(1);
 196                                 }
 197                                 break;
 198                         default:
 199                                 ;
 200                         }
 201                         break;
 202                 case '\n':
 203                         break;
 204                 default:
 205                         continue;
 206                 }
 207                 if (sym && sym_is_choice_value(sym)) {
 208                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 209                         switch (sym->user.tri) {
 210                         case no:
 211                                 break;
 212                         case mod:
 213                                 if (cs->user.tri == yes)
 214                                         /* warn? */;
 215                                 break;
 216                         case yes:
 217                                 if (cs->user.tri != no)
 218                                         /* warn? */;
 219                                 cs->user.val = sym;
 220                                 break;
 221                         }
 222                         cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
 223                         cs->flags &= ~SYMBOL_NEW;
 224                 }
 225         }
 226         fclose(in);
 227
 228         for_all_symbols(i, sym) {
 229                 sym_calc_value(sym);
 230                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 231                         if (sym->visible == no)
 232                                 sym->flags |= SYMBOL_NEW;
 233                         switch (sym->type) {
 234                         case S_STRING:
 235                         case S_INT:
 236                         case S_HEX:
 237                                 if (!sym_string_within_range(sym, sym->user.val))
 238                                         sym->flags |= SYMBOL_NEW;
 239                         default:
 240                                 break;
 241                         }
 242                 }
 243                 if (!sym_is_choice(sym))
 244                         continue;
 245                 prop = sym_get_choice_prop(sym);
 246                 for (e = prop->expr; e; e = e->left.expr)
 247                         if (e->right.sym->visible != no)
 248                                 sym->flags |= e->right.sym->flags & SYMBOL_NEW;
 249         }
 250
 251         sym_change_count = 1;
 252
 253         return 0;
 254 }
 255
 256 int conf_write(const char *name)
 257 {
 258         FILE *out, *out_h;
 259         struct symbol *sym;
 260         struct menu *menu;
 261         const char *basename;
 262         char dirname[128], tmpname[128], newname[128];
 263         int type, l;
 264         const char *str;
 265
 266         dirname[0] = 0;
 267         if (name && name[0]) {
 268                 char *slash = strrchr(name, '/');
 269                 if (slash) {
 270                         int size = slash - name + 1;
 271                         memcpy(dirname, name, size);
 272                         dirname[size] = 0;
 273                         if (slash[1])
 274                                 basename = slash + 1;
 275                         else
 276                                 basename = conf_def_filename;
 277                 } else
 278                         basename = name;
 279         } else
 280                 basename = conf_def_filename;
 281
 282         sprintf(newname, "%s.tmpconfig.%d", dirname, getpid());
 283         out = fopen(newname, "w");
 284         if (!out)
 285                 return 1;
 286         out_h = NULL;
 287         if (!name) {
 288                 out_h = fopen(".tmpconfig.h", "w");
 289                 if (!out_h)
 290                         return 1;
 291         }
 292         fprintf(out, "#\n"
 293                      "# Automatically generated make config: don't edit\n"
 294                      "#\n");
 295         if (out_h)
 296                 fprintf(out_h, "/*\n"
 297                              " * Automatically generated header file: don't edit\n"
 298                              " */\n\n"
 299                              "#define AUTOCONF_INCLUDED\n\n"
 300                              "/* Version Number */\n"
 301                              "#define BB_VER \"%s\"\n"
 302                              "#define BB_BT \"%s\"\n\n",
 303                              getenv("VERSION"),
 304                              getenv("BUILDTIME"));
 305
 306         if (!sym_change_count)
 307                 sym_clear_all_valid();
 308
 309         menu = rootmenu.list;
 310         while (menu) {
 311                 sym = menu->sym;
 312                 if (!sym) {
 313                         if (!menu_is_visible(menu))
 314                                 goto next;
 315                         str = menu_get_prompt(menu);
 316                         fprintf(out, "\n"
 317                                      "#\n"
 318                                      "# %s\n"
 319                                      "#\n", str);
 320                         if (out_h)
 321                                 fprintf(out_h, "\n"
 322                                                "/*\n"
 323                                                " * %s\n"
 324                                                " */\n", str);
 325                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 326                         sym_calc_value(sym);
 327                         if (!(sym->flags & SYMBOL_WRITE))
 328                                 goto next;
 329                         sym->flags &= ~SYMBOL_WRITE;
 330                         type = sym->type;
 331                         if (type == S_TRISTATE) {
 332                                 sym_calc_value(modules_sym);
 333                                 if (modules_sym->curr.tri == no)
 334                                         type = S_BOOLEAN;
 335                         }
 336                         switch (type) {
 337                         case S_BOOLEAN:
 338                         case S_TRISTATE:
 339                                 switch (sym_get_tristate_value(sym)) {
 340                                 case no:
 341                                         fprintf(out, "# %s is not set\n", sym->name);
 342                                         if (out_h)
 343                                                 fprintf(out_h, "#undef %s\n", sym->name);
 344                                         break;
 345                                 case mod:
 346 #if 0
 347                                         fprintf(out, "%s=m\n", sym->name);
 348                                         if (out_h)
 349                                                 fprintf(out_h, "#define %s_MODULE 1\n", sym->name);
 350 #endif
 351                                         break;
 352                                 case yes:
 353                                         fprintf(out, "%s=y\n", sym->name);
 354                                         if (out_h)
 355                                                 fprintf(out_h, "#define %s 1\n", sym->name);
 356                                         break;
 357                                 }
 358                                 break;
 359                         case S_STRING:
 360                                 // fix me
 361                                 str = sym_get_string_value(sym);
 362                                 fprintf(out, "%s=\"", sym->name);
 363                                 if (out_h)
 364                                         fprintf(out_h, "#define %s \"", sym->name);
 365                                 do {
 366                                         l = strcspn(str, "\"\\");
 367                                         if (l) {
 368                                                 fwrite(str, l, 1, out);
 369                                                 if (out_h)
 370                                                         fwrite(str, l, 1, out_h);
 371                                         }
 372                                         str += l;
 373                                         while (*str == '\\' || *str == '"') {
 374                                                 fprintf(out, "\\%c", *str);
 375                                                 if (out_h)
 376                                                         fprintf(out_h, "\\%c", *str);
 377                                                 str++;
 378                                         }
 379                                 } while (*str);
 380                                 fputs("\"\n", out);
 381                                 if (out_h)
 382                                         fputs("\"\n", out_h);
 383                                 break;
 384                         case S_HEX:
 385                                 str = sym_get_string_value(sym);
 386                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 387                                         fprintf(out, "%s=%s\n", sym->name, str);
 388                                         if (out_h)
 389                                                 fprintf(out_h, "#define %s 0x%s\n", sym->name, str);
 390                                         break;
 391                                 }
 392                         case S_INT:
 393                                 str = sym_get_string_value(sym);
 394                                 fprintf(out, "%s=%s\n", sym->name, str);
 395                                 if (out_h)
 396                                         fprintf(out_h, "#define %s %s\n", sym->name, str);
 397                                 break;
 398                         }
 399                 }
 400
 401         next:
 402                 if (menu->list) {
 403                         menu = menu->list;
 404                         continue;
 405                 }
 406                 if (menu->next)
 407                         menu = menu->next;
 408                 else while ((menu = menu->parent)) {
 409                         if (menu->next) {
 410                                 menu = menu->next;
 411                                 break;
 412                         }
 413                 }
 414         }
 415         fclose(out);
 416         if (out_h) {
 417                 fclose(out_h);
 418                 rename(".tmpconfig.h", "include/config.h");
 419                 file_write_dep(NULL);
 420         }
 421         if (!name || basename != conf_def_filename) {
 422                 if (!name)
 423                         name = conf_def_filename;
 424                 sprintf(tmpname, "%s.old", name);
 425                 rename(name, tmpname);
 426         }
 427         sprintf(tmpname, "%s%s", dirname, basename);
 428         if (rename(newname, tmpname))
 429                 return 1;
 430
 431         sym_change_count = 0;
 432
 433         return 0;
 434 }