package/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[] = ".defconfig";
  19
  20 const char *conf_confnames[] = {
  21         ".config",
  22         conf_defname,
  23         NULL,
  24 };
  25
  26 static char *conf_expand_value(const signed char *in)
  27 {
  28         struct symbol *sym;
  29         const signed 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[PATH_MAX+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         if (modules_sym)
 229                 sym_calc_value(modules_sym);
 230         for_all_symbols(i, sym) {
 231                 sym_calc_value(sym);
 232                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 233                         if (sym->visible == no)
 234                                 sym->flags |= SYMBOL_NEW;
 235                         switch (sym->type) {
 236                         case S_STRING:
 237                         case S_INT:
 238                         case S_HEX:
 239                                 if (!sym_string_within_range(sym, sym->user.val))
 240                                         sym->flags |= SYMBOL_NEW;
 241                         default:
 242                                 break;
 243                         }
 244                 }
 245                 if (!sym_is_choice(sym))
 246                         continue;
 247                 prop = sym_get_choice_prop(sym);
 248                 for (e = prop->expr; e; e = e->left.expr)
 249                         if (e->right.sym->visible != no)
 250                                 sym->flags |= e->right.sym->flags & SYMBOL_NEW;
 251         }
 252
 253         sym_change_count = 1;
 254
 255         return 0;
 256 }
 257
 258 int conf_write(const char *name)
 259 {
 260         FILE *out;
 261         struct symbol *sym;
 262         struct menu *menu;
 263         const char *basename;
 264         char dirname[128], tmpname[128], newname[128];
 265         int type, l;
 266         const char *str;
 267
 268         dirname[0] = 0;
 269         if (name && name[0]) {
 270                 struct stat st;
 271                 char *slash;
 272
 273                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 274                         strcpy(dirname, name);
 275                         strcat(dirname, "/");
 276                         basename = conf_def_filename;
 277                 } else if ((slash = strrchr(name, '/'))) {
 278                         int size = slash - name + 1;
 279                         memcpy(dirname, name, size);
 280                         dirname[size] = 0;
 281                         if (slash[1])
 282                                 basename = slash + 1;
 283                         else
 284                                 basename = conf_def_filename;
 285                 } else
 286                         basename = name;
 287         } else
 288                 basename = conf_def_filename;
 289
 290         sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
 291         out = fopen(newname, "w");
 292         if (!out)
 293                 return 1;
 294         fprintf(out, "#\n"
 295                      "# Automatically generated make config: don't edit\n"
 296                      "#\n");
 297
 298         if (!sym_change_count)
 299                 sym_clear_all_valid();
 300
 301         menu = rootmenu.list;
 302         while (menu) {
 303                 sym = menu->sym;
 304                 if (!sym) {
 305                         if (!menu_is_visible(menu))
 306                                 goto next;
 307                         str = menu_get_prompt(menu);
 308                         fprintf(out, "\n"
 309                                      "#\n"
 310                                      "# %s\n"
 311                                      "#\n", str);
 312                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
 313                         sym_calc_value(sym);
 314                         if (!(sym->flags & SYMBOL_WRITE))
 315                                 goto next;
 316                         sym->flags &= ~SYMBOL_WRITE;
 317                         type = sym->type;
 318                         if (type == S_TRISTATE) {
 319                                 sym_calc_value(modules_sym);
 320                                 if (modules_sym->curr.tri == no)
 321                                         type = S_BOOLEAN;
 322                         }
 323                         switch (type) {
 324                         case S_BOOLEAN:
 325                         case S_TRISTATE:
 326                                 switch (sym_get_tristate_value(sym)) {
 327                                 case no:
 328                                         fprintf(out, "# %s is not set\n", sym->name);
 329                                         break;
 330                                 case mod:
 331                                         fprintf(out, "%s=m\n", sym->name);
 332                                         break;
 333                                 case yes:
 334                                         fprintf(out, "%s=y\n", sym->name);
 335                                         break;
 336                                 }
 337                                 break;
 338                         case S_STRING:
 339                                 // fix me
 340                                 str = sym_get_string_value(sym);
 341                                 fprintf(out, "%s=\"", sym->name);
 342                                 do {
 343                                         l = strcspn(str, "\"\\");
 344                                         if (l) {
 345                                                 fwrite(str, l, 1, out);
 346                                         }
 347                                         str += l;
 348                                         while (*str == '\\' || *str == '"') {
 349                                                 fprintf(out, "\\%c", *str);
 350                                                 str++;
 351                                         }
 352                                 } while (*str);
 353                                 fputs("\"\n", out);
 354                                 break;
 355                         case S_HEX:
 356                                 str = sym_get_string_value(sym);
 357                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 358                                         fprintf(out, "%s=%s\n", sym->name, str);
 359                                         break;
 360                                 }
 361                         case S_INT:
 362                                 str = sym_get_string_value(sym);
 363                                 fprintf(out, "%s=%s\n", sym->name, str);
 364                                 break;
 365                         }
 366                 }
 367
 368         next:
 369                 if (menu->list) {
 370                         menu = menu->list;
 371                         continue;
 372                 }
 373                 if (menu->next)
 374                         menu = menu->next;
 375                 else while ((menu = menu->parent)) {
 376                         if (menu->next) {
 377                                 menu = menu->next;
 378                                 break;
 379                         }
 380                 }
 381         }
 382         fclose(out);
 383         file_write_dep(NULL);
 384         if (!name || basename != conf_def_filename) {
 385                 if (!name)
 386                         name = conf_def_filename;
 387                 sprintf(tmpname, "%s.old", name);
 388                 rename(name, tmpname);
 389         }
 390         sprintf(tmpname, "%s%s", dirname, basename);
 391         if (rename(newname, tmpname))
 392                 return 1;
 393
 394         sym_change_count = 0;
 395
 396         return 0;
 397 }