main/config.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2005, Digium, Inc.
   5  *
   6  * Mark Spencer <markster@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  *
  21  * \brief Configuration File Parser
  22  *
  23  * \author Mark Spencer <markster@digium.com>
  24  *
  25  * Includes the Asterisk Realtime API - ARA
  26  * See doc/realtime.txt and doc/extconfig.txt
  27  */
  28
  29 #include "asterisk.h"
  30
  31 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  32
  33 #include <stdio.h>
  34 #include <unistd.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <errno.h>
  38 #include <time.h>
  39 #include <sys/stat.h>
  40 #define AST_INCLUDE_GLOB 1
  41 #ifdef AST_INCLUDE_GLOB
  42 #if defined(__Darwin__) || defined(__CYGWIN__)
  43 #define GLOB_ABORTED GLOB_ABEND
  44 #endif
  45 # include <glob.h>
  46 #endif
  47
  48 #include "asterisk/config.h"
  49 #include "asterisk/cli.h"
  50 #include "asterisk/lock.h"
  51 #include "asterisk/options.h"
  52 #include "asterisk/logger.h"
  53 #include "asterisk/utils.h"
  54 #include "asterisk/channel.h"
  55 #include "asterisk/app.h"
  56
  57 #define MAX_NESTED_COMMENTS 128
  58 #define COMMENT_START ";--"
  59 #define COMMENT_END "--;"
  60 #define COMMENT_META ';'
  61 #define COMMENT_TAG '-'
  62
  63 static char *extconfig_conf = "extconfig.conf";
  64
  65
  66 /*! \brief Structure to keep comments for rewriting configuration files */
  67 struct ast_comment {
  68         struct ast_comment *next;
  69         char cmt[0];
  70 };
  71
  72 #define CB_INCR 250
  73
  74 static void CB_INIT(char **comment_buffer, int *comment_buffer_size, char **lline_buffer, int *lline_buffer_size)
  75 {
  76         if (!(*comment_buffer)) {
  77                 *comment_buffer = ast_malloc(CB_INCR);
  78                 if (!(*comment_buffer))
  79                         return;
  80                 (*comment_buffer)[0] = 0;
  81                 *comment_buffer_size = CB_INCR;
  82                 *lline_buffer = ast_malloc(CB_INCR);
  83                 if (!(*lline_buffer))
  84                         return;
  85                 (*lline_buffer)[0] = 0;
  86                 *lline_buffer_size = CB_INCR;
  87         } else {
  88                 (*comment_buffer)[0] = 0;
  89                 (*lline_buffer)[0] = 0;
  90         }
  91 }
  92
  93 static void  CB_ADD(char **comment_buffer, int *comment_buffer_size, char *str)
  94 {
  95         int rem = *comment_buffer_size - strlen(*comment_buffer) - 1;
  96         int siz = strlen(str);
  97         if (rem < siz+1) {
  98                 *comment_buffer = ast_realloc(*comment_buffer, *comment_buffer_size + CB_INCR + siz + 1);
  99                 if (!(*comment_buffer))
 100                         return;
 101                 *comment_buffer_size += CB_INCR+siz+1;
 102         }
 103         strcat(*comment_buffer,str);
 104 }
 105
 106 static void  CB_ADD_LEN(char **comment_buffer, int *comment_buffer_size, char *str, int len)
 107 {
 108         int cbl = strlen(*comment_buffer) + 1;
 109         int rem = *comment_buffer_size - cbl;
 110         if (rem < len+1) {
 111                 *comment_buffer = ast_realloc(*comment_buffer, *comment_buffer_size + CB_INCR + len + 1);
 112                 if (!(*comment_buffer))
 113                         return;
 114                 *comment_buffer_size += CB_INCR+len+1;
 115         }
 116         strncat(*comment_buffer,str,len);
 117         (*comment_buffer)[cbl+len-1] = 0;
 118 }
 119
 120 static void  LLB_ADD(char **lline_buffer, int *lline_buffer_size, char *str)
 121 {
 122         int rem = *lline_buffer_size - strlen(*lline_buffer) - 1;
 123         int siz = strlen(str);
 124         if (rem < siz+1) {
 125                 *lline_buffer = ast_realloc(*lline_buffer, *lline_buffer_size + CB_INCR + siz + 1);
 126                 if (!(*lline_buffer))
 127                         return;
 128                 *lline_buffer_size += CB_INCR + siz + 1;
 129         }
 130         strcat(*lline_buffer,str);
 131 }
 132
 133 static void CB_RESET(char **comment_buffer, char **lline_buffer)
 134 {
 135         (*comment_buffer)[0] = 0;
 136         (*lline_buffer)[0] = 0;
 137 }
 138
 139
 140 static struct ast_comment *ALLOC_COMMENT(const char *buffer)
 141 {
 142         struct ast_comment *x = ast_calloc(1,sizeof(struct ast_comment)+strlen(buffer)+1);
 143         strcpy(x->cmt, buffer);
 144         return x;
 145 }
 146
 147
 148 static struct ast_config_map {
 149         struct ast_config_map *next;
 150         char *name;
 151         char *driver;
 152         char *database;
 153         char *table;
 154         char stuff[0];
 155 } *config_maps = NULL;
 156
 157 AST_MUTEX_DEFINE_STATIC(config_lock);
 158 static struct ast_config_engine *config_engine_list;
 159
 160 #define MAX_INCLUDE_LEVEL 10
 161
 162 struct ast_category_template_instance {
 163         char name[80]; /* redundant? */
 164         const struct ast_category *inst;
 165         AST_LIST_ENTRY(ast_category_template_instance) next;
 166 };
 167
 168 struct ast_category {
 169         char name[80];
 170         int ignored;                    /*!< do not let user of the config see this category */
 171         int include_level;
 172         AST_LIST_HEAD_NOLOCK(template_instance_list, ast_category_template_instance) template_instances;
 173         struct ast_comment *precomments;
 174         struct ast_comment *sameline;
 175         struct ast_variable *root;
 176         struct ast_variable *last;
 177         struct ast_category *next;
 178 };
 179
 180 struct ast_config {
 181         struct ast_category *root;
 182         struct ast_category *last;
 183         struct ast_category *current;
 184         struct ast_category *last_browse;               /*!< used to cache the last category supplied via category_browse */
 185         int include_level;
 186         int max_include_level;
 187 };
 188
 189 struct ast_variable *ast_variable_new(const char *name, const char *value)
 190 {
 191         struct ast_variable *variable;
 192         int name_len = strlen(name) + 1;
 193
 194         if ((variable = ast_calloc(1, name_len + strlen(value) + 1 + sizeof(*variable)))) {
 195                 variable->name = variable->stuff;
 196                 variable->value = variable->stuff + name_len;
 197                 strcpy(variable->name,name);
 198                 strcpy(variable->value,value);
 199         }
 200
 201         return variable;
 202 }
 203
 204 void ast_variable_append(struct ast_category *category, struct ast_variable *variable)
 205 {
 206         if (!variable)
 207                 return;
 208         if (category->last)
 209                 category->last->next = variable;
 210         else
 211                 category->root = variable;
 212         category->last = variable;
 213         while (category->last->next)
 214                 category->last = category->last->next;
 215 }
 216
 217 void ast_variables_destroy(struct ast_variable *v)
 218 {
 219         struct ast_variable *vn;
 220
 221         while(v) {
 222                 vn = v;
 223                 v = v->next;
 224                 free(vn);
 225         }
 226 }
 227
 228 struct ast_variable *ast_variable_browse(const struct ast_config *config, const char *category)
 229 {
 230         struct ast_category *cat = NULL;
 231
 232         if (category && config->last_browse && (config->last_browse->name == category))
 233                 cat = config->last_browse;
 234         else
 235                 cat = ast_category_get(config, category);
 236
 237         return (cat) ? cat->root : NULL;
 238 }
 239
 240 const char *ast_config_option(struct ast_config *cfg, const char *cat, const char *var)
 241 {
 242         const char *tmp;
 243         tmp = ast_variable_retrieve(cfg, cat, var);
 244         if (!tmp)
 245                 tmp = ast_variable_retrieve(cfg, "general", var);
 246         return tmp;
 247 }
 248
 249
 250 const char *ast_variable_retrieve(const struct ast_config *config, const char *category, const char *variable)
 251 {
 252         struct ast_variable *v;
 253
 254         if (category) {
 255                 for (v = ast_variable_browse(config, category); v; v = v->next) {
 256                         if (!strcasecmp(variable, v->name))
 257                                 return v->value;
 258                 }
 259         } else {
 260                 struct ast_category *cat;
 261
 262                 for (cat = config->root; cat; cat = cat->next)
 263                         for (v = cat->root; v; v = v->next)
 264                                 if (!strcasecmp(variable, v->name))
 265                                         return v->value;
 266         }
 267
 268         return NULL;
 269 }
 270
 271 static struct ast_variable *variable_clone(const struct ast_variable *old)
 272 {
 273         struct ast_variable *new = ast_variable_new(old->name, old->value);
 274
 275         if (new) {
 276                 new->lineno = old->lineno;
 277                 new->object = old->object;
 278                 new->blanklines = old->blanklines;
 279                 /* TODO: clone comments? */
 280         }
 281
 282         return new;
 283 }
 284
 285 static void move_variables(struct ast_category *old, struct ast_category *new)
 286 {
 287         struct ast_variable *var = old->root;
 288         old->root = NULL;
 289 #if 1
 290         /* we can just move the entire list in a single op */
 291         ast_variable_append(new, var);
 292 #else
 293         while (var) {
 294                 struct ast_variable *next = var->next;
 295                 var->next = NULL;
 296                 ast_variable_append(new, var);
 297                 var = next;
 298         }
 299 #endif
 300 }
 301
 302 struct ast_category *ast_category_new(const char *name)
 303 {
 304         struct ast_category *category;
 305
 306         if ((category = ast_calloc(1, sizeof(*category))))
 307                 ast_copy_string(category->name, name, sizeof(category->name));
 308         return category;
 309 }
 310
 311 static struct ast_category *category_get(const struct ast_config *config, const char *category_name, int ignored)
 312 {
 313         struct ast_category *cat;
 314
 315         /* try exact match first, then case-insensitive match */
 316         for (cat = config->root; cat; cat = cat->next) {
 317                 if (cat->name == category_name && (ignored || !cat->ignored))
 318                         return cat;
 319         }
 320
 321         for (cat = config->root; cat; cat = cat->next) {
 322                 if (!strcasecmp(cat->name, category_name) && (ignored || !cat->ignored))
 323                         return cat;
 324         }
 325
 326         return NULL;
 327 }
 328
 329 struct ast_category *ast_category_get(const struct ast_config *config, const char *category_name)
 330 {
 331         return category_get(config, category_name, 0);
 332 }
 333
 334 int ast_category_exist(const struct ast_config *config, const char *category_name)
 335 {
 336         return !!ast_category_get(config, category_name);
 337 }
 338
 339 void ast_category_append(struct ast_config *config, struct ast_category *category)
 340 {
 341         if (config->last)
 342                 config->last->next = category;
 343         else
 344                 config->root = category;
 345         category->include_level = config->include_level;
 346         config->last = category;
 347         config->current = category;
 348 }
 349
 350 static void ast_destroy_comments(struct ast_category *cat)
 351 {
 352         struct ast_comment *n, *p;
 353         for (p=cat->precomments; p; p=n) {
 354                 n = p->next;
 355                 free(p);
 356         }
 357         for (p=cat->sameline; p; p=n) {
 358                 n = p->next;
 359                 free(p);
 360         }
 361         cat->precomments = NULL;
 362         cat->sameline = NULL;
 363 }
 364
 365 static void ast_destroy_template_list(struct ast_category *cat)
 366 {
 367         struct ast_category_template_instance *x;
 368         AST_LIST_TRAVERSE_SAFE_BEGIN(&cat->template_instances, x, next) {
 369                 AST_LIST_REMOVE_CURRENT(&cat->template_instances, next);
 370                 free(x);
 371         }
 372         AST_LIST_TRAVERSE_SAFE_END;
 373 }
 374
 375 void ast_category_destroy(struct ast_category *cat)
 376 {
 377         ast_variables_destroy(cat->root);
 378         ast_destroy_comments(cat);
 379         ast_destroy_template_list(cat);
 380         free(cat);
 381 }
 382
 383 static struct ast_category *next_available_category(struct ast_category *cat)
 384 {
 385         for (; cat && cat->ignored; cat = cat->next);
 386
 387         return cat;
 388 }
 389
 390 struct ast_variable *ast_category_root(struct ast_config *config, char *cat)
 391 {
 392         struct ast_category *category = ast_category_get(config, cat);
 393         if (category)
 394                 return category->root;
 395         return NULL;
 396 }
 397
 398 char *ast_category_browse(struct ast_config *config, const char *prev)
 399 {
 400         struct ast_category *cat = NULL;
 401
 402         if (prev && config->last_browse && (config->last_browse->name == prev))
 403                 cat = config->last_browse->next;
 404         else if (!prev && config->root)
 405                 cat = config->root;
 406         else if (prev) {
 407                 for (cat = config->root; cat; cat = cat->next) {
 408                         if (cat->name == prev) {
 409                                 cat = cat->next;
 410                                 break;
 411                         }
 412                 }
 413                 if (!cat) {
 414                         for (cat = config->root; cat; cat = cat->next) {
 415                                 if (!strcasecmp(cat->name, prev)) {
 416                                         cat = cat->next;
 417                                         break;
 418                                 }
 419                         }
 420                 }
 421         }
 422
 423         if (cat)
 424                 cat = next_available_category(cat);
 425
 426         config->last_browse = cat;
 427         return (cat) ? cat->name : NULL;
 428 }
 429
 430 struct ast_variable *ast_category_detach_variables(struct ast_category *cat)
 431 {
 432         struct ast_variable *v;
 433
 434         v = cat->root;
 435         cat->root = NULL;
 436         cat->last = NULL;
 437
 438         return v;
 439 }
 440
 441 void ast_category_rename(struct ast_category *cat, const char *name)
 442 {
 443         ast_copy_string(cat->name, name, sizeof(cat->name));
 444 }
 445
 446 static void inherit_category(struct ast_category *new, const struct ast_category *base)
 447 {
 448         struct ast_variable *var;
 449         struct ast_category_template_instance *x = ast_calloc(1,sizeof(struct ast_category_template_instance));
 450         strcpy(x->name, base->name);
 451         x->inst = base;
 452         AST_LIST_INSERT_TAIL(&new->template_instances, x, next);
 453         for (var = base->root; var; var = var->next)
 454                 ast_variable_append(new, variable_clone(var));
 455 }
 456
 457 struct ast_config *ast_config_new(void)
 458 {
 459         struct ast_config *config;
 460
 461         if ((config = ast_calloc(1, sizeof(*config))))
 462                 config->max_include_level = MAX_INCLUDE_LEVEL;
 463         return config;
 464 }
 465
 466 int ast_variable_delete(struct ast_category *category, char *variable, char *match)
 467 {
 468         struct ast_variable *cur, *prev=NULL, *curn;
 469         int res = -1;
 470         cur = category->root;
 471         while (cur) {
 472                 if (cur->name == variable) {
 473                         if (prev) {
 474                                 prev->next = cur->next;
 475                                 if (cur == category->last)
 476                                         category->last = prev;
 477                         } else {
 478                                 category->root = cur->next;
 479                                 if (cur == category->last)
 480                                         category->last = NULL;
 481                         }
 482                         cur->next = NULL;
 483                         ast_variables_destroy(cur);
 484                         return 0;
 485                 }
 486                 prev = cur;
 487                 cur = cur->next;
 488         }
 489
 490         prev = NULL;
 491         cur = category->root;
 492         while (cur) {
 493                 curn = cur->next;
 494                 if (!strcasecmp(cur->name, variable) && (ast_strlen_zero(match) || !strcasecmp(cur->value, match))) {
 495                         if (prev) {
 496                                 prev->next = cur->next;
 497                                 if (cur == category->last)
 498                                         category->last = prev;
 499                         } else {
 500                                 category->root = cur->next;
 501                                 if (cur == category->last)
 502                                         category->last = NULL;
 503                         }
 504                         cur->next = NULL;
 505                         ast_variables_destroy(cur);
 506                         res = 0;
 507                 } else
 508                         prev = cur;
 509
 510                 cur = curn;
 511         }
 512         return res;
 513 }
 514
 515 int ast_variable_update(struct ast_category *category, const char *variable,
 516         const char *value, const char *match, unsigned int object)
 517 {
 518         struct ast_variable *cur, *prev=NULL, *newer;
 519
 520         if (!(newer = ast_variable_new(variable, value)))
 521                 return -1;
 522
 523         newer->object = object;
 524
 525         for (cur = category->root; cur; prev = cur, cur = cur->next) {
 526                 if (strcasecmp(cur->name, variable) ||
 527                         (!ast_strlen_zero(match) && strcasecmp(cur->value, match)))
 528                         continue;
 529
 530                 newer->next = cur->next;
 531                 newer->object = cur->object || object;
 532                 if (prev)
 533                         prev->next = newer;
 534                 else
 535                         category->root = newer;
 536                 if (category->last == cur)
 537                         category->last = newer;
 538
 539                 cur->next = NULL;
 540                 ast_variables_destroy(cur);
 541
 542                 return 0;
 543         }
 544
 545         if (prev)
 546                 prev->next = newer;
 547         else
 548                 category->root = newer;
 549
 550         return 0;
 551 }
 552
 553 int ast_category_delete(struct ast_config *cfg, char *category)
 554 {
 555         struct ast_category *prev=NULL, *cat;
 556         cat = cfg->root;
 557         while(cat) {
 558                 if (cat->name == category) {
 559                         if (prev) {
 560                                 prev->next = cat->next;
 561                                 if (cat == cfg->last)
 562                                         cfg->last = prev;
 563                         } else {
 564                                 cfg->root = cat->next;
 565                                 if (cat == cfg->last)
 566                                         cfg->last = NULL;
 567                         }
 568                         ast_category_destroy(cat);
 569                         return 0;
 570                 }
 571                 prev = cat;
 572                 cat = cat->next;
 573         }
 574
 575         prev = NULL;
 576         cat = cfg->root;
 577         while(cat) {
 578                 if (!strcasecmp(cat->name, category)) {
 579                         if (prev) {
 580                                 prev->next = cat->next;
 581                                 if (cat == cfg->last)
 582                                         cfg->last = prev;
 583                         } else {
 584                                 cfg->root = cat->next;
 585                                 if (cat == cfg->last)
 586                                         cfg->last = NULL;
 587                         }
 588                         ast_category_destroy(cat);
 589                         return 0;
 590                 }
 591                 prev = cat;
 592                 cat = cat->next;
 593         }
 594         return -1;
 595 }
 596
 597 void ast_config_destroy(struct ast_config *cfg)
 598 {
 599         struct ast_category *cat, *catn;
 600
 601         if (!cfg)
 602                 return;
 603
 604         cat = cfg->root;
 605         while(cat) {
 606                 catn = cat;
 607                 cat = cat->next;
 608                 ast_category_destroy(catn);
 609         }
 610         free(cfg);
 611 }
 612
 613 struct ast_category *ast_config_get_current_category(const struct ast_config *cfg)
 614 {
 615         return cfg->current;
 616 }
 617
 618 void ast_config_set_current_category(struct ast_config *cfg, const struct ast_category *cat)
 619 {
 620         /* cast below is just to silence compiler warning about dropping "const" */
 621         cfg->current = (struct ast_category *) cat;
 622 }
 623
 624 static int process_text_line(struct ast_config *cfg, struct ast_category **cat, char *buf, int lineno, const char *configfile, int withcomments,
 625                                 char **comment_buffer, int *comment_buffer_size, char **lline_buffer, int *lline_buffer_size)
 626 {
 627         char *c;
 628         char *cur = buf;
 629         struct ast_variable *v;
 630         char cmd[512], exec_file[512];
 631         int object, do_exec, do_include;
 632
 633         /* Actually parse the entry */
 634         if (cur[0] == '[') {
 635                 struct ast_category *newcat = NULL;
 636                 char *catname;
 637
 638                 /* A category header */
 639                 c = strchr(cur, ']');
 640                 if (!c) {
 641                         ast_log(LOG_WARNING, "parse error: no closing ']', line %d of %s\n", lineno, configfile);
 642                         return -1;
 643                 }
 644                 *c++ = '\0';
 645                 cur++;
 646                 if (*c++ != '(')
 647                         c = NULL;
 648                 catname = cur;
 649                 if (!(*cat = newcat = ast_category_new(catname))) {
 650                         return -1;
 651                 }
 652                 /* add comments */
 653                 if (withcomments && *comment_buffer && (*comment_buffer)[0] ) {
 654                         newcat->precomments = ALLOC_COMMENT(*comment_buffer);
 655                 }
 656                 if (withcomments && *lline_buffer && (*lline_buffer)[0] ) {
 657                         newcat->sameline = ALLOC_COMMENT(*lline_buffer);
 658                 }
 659                 if( withcomments )
 660                         CB_RESET(comment_buffer, lline_buffer);
 661
 662                 /* If there are options or categories to inherit from, process them now */
 663                 if (c) {
 664                         if (!(cur = strchr(c, ')'))) {
 665                                 ast_log(LOG_WARNING, "parse error: no closing ')', line %d of %s\n", lineno, configfile);
 666                                 return -1;
 667                         }
 668                         *cur = '\0';
 669                         while ((cur = strsep(&c, ","))) {
 670                                 if (!strcasecmp(cur, "!")) {
 671                                         (*cat)->ignored = 1;
 672                                 } else if (!strcasecmp(cur, "+")) {
 673                                         *cat = category_get(cfg, catname, 1);
 674                                         if (!(*cat)) {
 675                                                 if (newcat)
 676                                                         ast_category_destroy(newcat);
 677                                                 ast_log(LOG_WARNING, "Category addition requested, but category '%s' does not exist, line %d of %s\n", catname, lineno, configfile);
 678                                                 return -1;
 679                                         }
 680                                         if (newcat) {
 681                                                 move_variables(newcat, *cat);
 682                                                 ast_category_destroy(newcat);
 683                                                 newcat = NULL;
 684                                         }
 685                                 } else {
 686                                         struct ast_category *base;
 687
 688                                         base = category_get(cfg, cur, 1);
 689                                         if (!base) {
 690                                                 ast_log(LOG_WARNING, "Inheritance requested, but category '%s' does not exist, line %d of %s\n", cur, lineno, configfile);
 691                                                 return -1;
 692                                         }
 693                                         inherit_category(*cat, base);
 694                                 }
 695                         }
 696                 }
 697                 if (newcat)
 698                         ast_category_append(cfg, *cat);
 699         } else if (cur[0] == '#') {
 700                 /* A directive */
 701                 cur++;
 702                 c = cur;
 703                 while(*c && (*c > 32)) c++;
 704                 if (*c) {
 705                         *c = '\0';
 706                         /* Find real argument */
 707                         c = ast_skip_blanks(c + 1);
 708                         if (!(*c))
 709                                 c = NULL;
 710                 } else
 711                         c = NULL;
 712                 do_include = !strcasecmp(cur, "include");
 713                 if(!do_include)
 714                         do_exec = !strcasecmp(cur, "exec");
 715                 else
 716                         do_exec = 0;
 717                 if (do_exec && !ast_opt_exec_includes) {
 718                         ast_log(LOG_WARNING, "Cannot perform #exec unless execincludes option is enabled in asterisk.conf (options section)!\n");
 719                         do_exec = 0;
 720                 }
 721                 if (do_include || do_exec) {
 722                         if (c) {
 723                                 /* Strip off leading and trailing "'s and <>'s */
 724                                 while((*c == '<') || (*c == '>') || (*c == '\"')) c++;
 725                                 /* Get rid of leading mess */
 726                                 cur = c;
 727                                 while (!ast_strlen_zero(cur)) {
 728                                         c = cur + strlen(cur) - 1;
 729                                         if ((*c == '>') || (*c == '<') || (*c == '\"'))
 730                                                 *c = '\0';
 731                                         else
 732                                                 break;
 733                                 }
 734                                 /* #exec </path/to/executable>
 735                                    We create a tmp file, then we #include it, then we delete it. */
 736                                 if (do_exec) {
 737                                         snprintf(exec_file, sizeof(exec_file), "/var/tmp/exec.%d.%ld", (int)time(NULL), (long)pthread_self());
 738                                         snprintf(cmd, sizeof(cmd), "%s > %s 2>&1", cur, exec_file);
 739                                         ast_safe_system(cmd);
 740                                         cur = exec_file;
 741                                 } else
 742                                         exec_file[0] = '\0';
 743                                 /* A #include */
 744                                 do_include = ast_config_internal_load(cur, cfg, withcomments) ? 1 : 0;
 745                                 if(!ast_strlen_zero(exec_file))
 746                                         unlink(exec_file);
 747                                 if (!do_include) {
 748                                         ast_log(LOG_ERROR, "*********************************************************\n");
 749                                         ast_log(LOG_ERROR, "*********** YOU SHOULD REALLY READ THIS ERROR ***********\n");
 750                                         ast_log(LOG_ERROR, "Future versions of Asterisk will treat a #include of a "
 751                                                            "file that does not exist as an error, and will fail to "
 752                                                            "load that configuration file.  Please ensure that the "
 753                                                            "file '%s' exists, even if it is empty.\n", cur);
 754                                         ast_log(LOG_ERROR, "*********** YOU SHOULD REALLY READ THIS ERROR ***********\n");
 755                                         ast_log(LOG_ERROR, "*********************************************************\n");
 756                                         return 0;
 757                                 }
 758
 759                         } else {
 760                                 ast_log(LOG_WARNING, "Directive '#%s' needs an argument (%s) at line %d of %s\n",
 761                                                 do_exec ? "exec" : "include",
 762                                                 do_exec ? "/path/to/executable" : "filename",
 763                                                 lineno,
 764                                                 configfile);
 765                         }
 766                 }
 767                 else
 768                         ast_log(LOG_WARNING, "Unknown directive '%s' at line %d of %s\n", cur, lineno, configfile);
 769         } else {
 770                 /* Just a line (variable = value) */
 771                 if (!(*cat)) {
 772                         ast_log(LOG_WARNING,
 773                                 "parse error: No category context for line %d of %s\n", lineno, configfile);
 774                         return -1;
 775                 }
 776                 c = strchr(cur, '=');
 777                 if (c) {
 778                         *c = 0;
 779                         c++;
 780                         /* Ignore > in => */
 781                         if (*c== '>') {
 782                                 object = 1;
 783                                 c++;
 784                         } else
 785                                 object = 0;
 786                         if ((v = ast_variable_new(ast_strip(cur), ast_strip(c)))) {
 787                                 v->lineno = lineno;
 788                                 v->object = object;
 789                                 /* Put and reset comments */
 790                                 v->blanklines = 0;
 791                                 ast_variable_append(*cat, v);
 792                                 /* add comments */
 793                                 if (withcomments && *comment_buffer && (*comment_buffer)[0] ) {
 794                                         v->precomments = ALLOC_COMMENT(*comment_buffer);
 795                                 }
 796                                 if (withcomments && *lline_buffer && (*lline_buffer)[0] ) {
 797                                         v->sameline = ALLOC_COMMENT(*lline_buffer);
 798                                 }
 799                                 if( withcomments )
 800                                         CB_RESET(comment_buffer, lline_buffer);
 801
 802                         } else {
 803                                 return -1;
 804                         }
 805                 } else {
 806                         ast_log(LOG_WARNING, "No '=' (equal sign) in line %d of %s\n", lineno, configfile);
 807                 }
 808         }
 809         return 0;
 810 }
 811
 812 static struct ast_config *config_text_file_load(const char *database, const char *table, const char *filename, struct ast_config *cfg, int withcomments)
 813 {
 814         char fn[256];
 815 #if defined(LOW_MEMORY)
 816         char buf[512];
 817 #else
 818         char buf[8192];
 819 #endif
 820         char *new_buf, *comment_p, *process_buf;
 821         FILE *f;
 822         int lineno=0;
 823         int comment = 0, nest[MAX_NESTED_COMMENTS];
 824         struct ast_category *cat = NULL;
 825         int count = 0;
 826         struct stat statbuf;
 827         /*! Growable string buffer */
 828         char *comment_buffer=0;   /*!< this will be a comment collector.*/
 829         int   comment_buffer_size=0;  /*!< the amount of storage so far alloc'd for the comment_buffer */
 830
 831         char *lline_buffer=0;    /*!< A buffer for stuff behind the ; */
 832         int  lline_buffer_size=0;
 833
 834
 835         cat = ast_config_get_current_category(cfg);
 836
 837         if (filename[0] == '/') {
 838                 ast_copy_string(fn, filename, sizeof(fn));
 839         } else {
 840                 snprintf(fn, sizeof(fn), "%s/%s", (char *)ast_config_AST_CONFIG_DIR, filename);
 841         }
 842
 843         if (withcomments) {
 844                 CB_INIT(&comment_buffer, &comment_buffer_size, &lline_buffer, &lline_buffer_size);
 845                 if (!lline_buffer || !comment_buffer) {
 846                         ast_log(LOG_ERROR, "Failed to initialize the comment buffer!\n");
 847                         return NULL;
 848                 }
 849         }
 850 #ifdef AST_INCLUDE_GLOB
 851         {
 852                 int glob_ret;
 853                 glob_t globbuf;
 854                 globbuf.gl_offs = 0;    /* initialize it to silence gcc */
 855 #ifdef SOLARIS
 856                 glob_ret = glob(fn, GLOB_NOCHECK, NULL, &globbuf);
 857 #else
 858                 glob_ret = glob(fn, GLOB_NOMAGIC|GLOB_BRACE, NULL, &globbuf);
 859 #endif
 860                 if (glob_ret == GLOB_NOSPACE)
 861                         ast_log(LOG_WARNING,
 862                                 "Glob Expansion of pattern '%s' failed: Not enough memory\n", fn);
 863                 else if (glob_ret  == GLOB_ABORTED)
 864                         ast_log(LOG_WARNING,
 865                                 "Glob Expansion of pattern '%s' failed: Read error\n", fn);
 866                 else  {
 867                         /* loop over expanded files */
 868                         int i;
 869                         for (i=0; i<globbuf.gl_pathc; i++) {
 870                                 ast_copy_string(fn, globbuf.gl_pathv[i], sizeof(fn));
 871 #endif
 872         do {
 873                 if (stat(fn, &statbuf))
 874                         continue;
 875
 876                 if (!S_ISREG(statbuf.st_mode)) {
 877                         ast_log(LOG_WARNING, "'%s' is not a regular file, ignoring\n", fn);
 878                         continue;
 879                 }
 880                 if (option_verbose > 1) {
 881                         ast_verbose(VERBOSE_PREFIX_2 "Parsing '%s': ", fn);
 882                         fflush(stdout);
 883                 }
 884                 if (!(f = fopen(fn, "r"))) {
 885                         if (option_debug)
 886                                 ast_log(LOG_DEBUG, "No file to parse: %s\n", fn);
 887                         if (option_verbose > 1)
 888                                 ast_verbose( "Not found (%s)\n", strerror(errno));
 889                         continue;
 890                 }
 891                 count++;
 892                 if (option_debug)
 893                         ast_log(LOG_DEBUG, "Parsing %s\n", fn);
 894                 if (option_verbose > 1)
 895                         ast_verbose("Found\n");
 896                 while(!feof(f)) {
 897                         lineno++;
 898                         if (fgets(buf, sizeof(buf), f)) {
 899                                 if ( withcomments ) {
 900                                         CB_ADD(&comment_buffer, &comment_buffer_size, lline_buffer);       /* add the current lline buffer to the comment buffer */
 901                                         lline_buffer[0] = 0;        /* erase the lline buffer */
 902                                 }
 903
 904                                 new_buf = buf;
 905                                 if (comment)
 906                                         process_buf = NULL;
 907                                 else
 908                                         process_buf = buf;
 909
 910                                 while ((comment_p = strchr(new_buf, COMMENT_META))) {
 911                                         if ((comment_p > new_buf) && (*(comment_p-1) == '\\')) {
 912                                                 /* Escaped semicolons aren't comments. */
 913                                                 new_buf = comment_p + 1;
 914                                         } else if(comment_p[1] == COMMENT_TAG && comment_p[2] == COMMENT_TAG && (comment_p[3] != '-')) {
 915                                                 /* Meta-Comment start detected ";--" */
 916                                                 if (comment < MAX_NESTED_COMMENTS) {
 917                                                         *comment_p = '\0';
 918                                                         new_buf = comment_p + 3;
 919                                                         comment++;
 920                                                         nest[comment-1] = lineno;
 921                                                 } else {
 922                                                         ast_log(LOG_ERROR, "Maximum nest limit of %d reached.\n", MAX_NESTED_COMMENTS);
 923                                                 }
 924                                         } else if ((comment_p >= new_buf + 2) &&
 925                                                    (*(comment_p - 1) == COMMENT_TAG) &&
 926                                                    (*(comment_p - 2) == COMMENT_TAG)) {
 927                                                 /* Meta-Comment end detected */
 928                                                 comment--;
 929                                                 new_buf = comment_p + 1;
 930                                                 if (!comment) {
 931                                                         /* Back to non-comment now */
 932                                                         if (process_buf) {
 933                                                                 /* Actually have to move what's left over the top, then continue */
 934                                                                 char *oldptr;
 935                                                                 oldptr = process_buf + strlen(process_buf);
 936                                                                 if ( withcomments ) {
 937                                                                         CB_ADD(&comment_buffer, &comment_buffer_size, ";");
 938                                                                         CB_ADD_LEN(&comment_buffer, &comment_buffer_size, oldptr+1, new_buf-oldptr-1);
 939                                                                 }
 940
 941                                                                 memmove(oldptr, new_buf, strlen(new_buf) + 1);
 942                                                                 new_buf = oldptr;
 943                                                         } else
 944                                                                 process_buf = new_buf;
 945                                                 }
 946                                         } else {
 947                                                 if (!comment) {
 948                                                         /* If ; is found, and we are not nested in a comment,
 949                                                            we immediately stop all comment processing */
 950                                                         if ( withcomments ) {
 951                                                                 LLB_ADD(&lline_buffer, &lline_buffer_size, comment_p);
 952                                                         }
 953                                                         *comment_p = '\0';
 954                                                         new_buf = comment_p;
 955                                                 } else
 956                                                         new_buf = comment_p + 1;
 957                                         }
 958                                 }
 959                                 if( withcomments && comment && !process_buf )
 960                                 {
 961                                         CB_ADD(&comment_buffer, &comment_buffer_size, buf);  /* the whole line is a comment, store it */
 962                                 }
 963
 964                                 if (process_buf) {
 965                                         char *buf = ast_strip(process_buf);
 966                                         if (!ast_strlen_zero(buf)) {
 967                                                 if (process_text_line(cfg, &cat, buf, lineno, fn, withcomments, &comment_buffer, &comment_buffer_size, &lline_buffer, &lline_buffer_size)) {
 968                                                         cfg = NULL;
 969                                                         break;
 970                                                 }
 971                                         }
 972                                 }
 973                         }
 974                 }
 975                 fclose(f);
 976         } while(0);
 977         if (comment) {
 978                 ast_log(LOG_WARNING,"Unterminated comment detected beginning on line %d\n", nest[comment - 1]);
 979         }
 980 #ifdef AST_INCLUDE_GLOB
 981                                         if (!cfg)
 982                                                 break;
 983                                 }
 984                                 globfree(&globbuf);
 985                         }
 986                 }
 987 #endif
 988
 989         if (cfg && cfg->include_level == 1 && withcomments && comment_buffer) {
 990                 free(comment_buffer);
 991                 free(lline_buffer);
 992                 comment_buffer = NULL;
 993                 lline_buffer = NULL;
 994                 comment_buffer_size = 0;
 995                 lline_buffer_size = 0;
 996         }
 997
 998         if (count == 0)
 999                 return NULL;
1000
1001         return cfg;
1002 }
1003
1004 int config_text_file_save(const char *configfile, const struct ast_config *cfg, const char *generator)
1005 {
1006         FILE *f = NULL;
1007         int fd = -1;
1008         char fn[256], fntmp[256];
1009         char date[256]="";
1010         time_t t;
1011         struct ast_variable *var;
1012         struct ast_category *cat;
1013         struct ast_comment *cmt;
1014         struct stat s;
1015         int blanklines = 0;
1016
1017         if (configfile[0] == '/') {
1018                 snprintf(fntmp, sizeof(fntmp), "%s.XXXXXX", configfile);
1019                 ast_copy_string(fn, configfile, sizeof(fn));
1020         } else {
1021                 snprintf(fntmp, sizeof(fntmp), "%s/%s.XXXXXX", ast_config_AST_CONFIG_DIR, configfile);
1022                 snprintf(fn, sizeof(fn), "%s/%s", ast_config_AST_CONFIG_DIR, configfile);
1023         }
1024         time(&t);
1025         ast_copy_string(date, ctime(&t), sizeof(date));
1026         if ((fd = mkstemp(fntmp)) > 0 && (f = fdopen(fd, "w")) != NULL) {
1027                 if (option_verbose > 1)
1028                         ast_verbose(VERBOSE_PREFIX_2 "Saving '%s': ", fn);
1029                 fprintf(f, ";!\n");
1030                 fprintf(f, ";! Automatically generated configuration file\n");
1031                 if (strcmp(configfile, fn))
1032                         fprintf(f, ";! Filename: %s (%s)\n", configfile, fn);
1033                 else
1034                         fprintf(f, ";! Filename: %s\n", configfile);
1035                 fprintf(f, ";! Generator: %s\n", generator);
1036                 fprintf(f, ";! Creation Date: %s", date);
1037                 fprintf(f, ";!\n");
1038                 cat = cfg->root;
1039                 while(cat) {
1040                         /* Dump section with any appropriate comment */
1041                         for (cmt = cat->precomments; cmt; cmt=cmt->next)
1042                         {
1043                                 if (cmt->cmt[0] != ';' || cmt->cmt[1] != '!')
1044                                         fprintf(f,"%s", cmt->cmt);
1045                         }
1046                         if (!cat->precomments)
1047                                 fprintf(f,"\n");
1048                         fprintf(f, "[%s]", cat->name);
1049                         if (cat->ignored || !AST_LIST_EMPTY(&cat->template_instances)) {
1050                                 fprintf(f, "(");
1051                                 if (cat->ignored) {
1052                                         fprintf(f, "!");
1053                                 }
1054                                 if (cat->ignored && !AST_LIST_EMPTY(&cat->template_instances)) {
1055                                         fprintf(f, ",");
1056                                 }
1057                                 if (!AST_LIST_EMPTY(&cat->template_instances)) {
1058                                         struct ast_category_template_instance *x;
1059                                         AST_LIST_TRAVERSE(&cat->template_instances, x, next) {
1060                                                 fprintf(f,"%s",x->name);
1061                                                 if (x != AST_LIST_LAST(&cat->template_instances))
1062                                                         fprintf(f,",");
1063                                         }
1064                                 }
1065                                 fprintf(f, ")");
1066                         }
1067                         for(cmt = cat->sameline; cmt; cmt=cmt->next)
1068                         {
1069                                 fprintf(f,"%s", cmt->cmt);
1070                         }
1071                         if (!cat->sameline)
1072                                 fprintf(f,"\n");
1073                         var = cat->root;
1074                         while(var) {
1075                                 struct ast_category_template_instance *x;
1076                                 struct ast_variable *v2;
1077                                 int found = 0;
1078                                 AST_LIST_TRAVERSE(&cat->template_instances, x, next) {
1079
1080                                         for (v2 = x->inst->root; v2; v2 = v2->next) {
1081                                                 if (!strcasecmp(var->name, v2->name))
1082                                                         break;
1083                                         }
1084                                         if (v2 && v2->value && !strcmp(v2->value, var->value)) {
1085                                                 found = 1;
1086                                                 break;
1087                                         }
1088                                 }
1089                                 if (found) {
1090                                         var = var->next;
1091                                         continue;
1092                                 }
1093                                 for (cmt = var->precomments; cmt; cmt=cmt->next)
1094                                 {
1095                                         if (cmt->cmt[0] != ';' || cmt->cmt[1] != '!')
1096                                                 fprintf(f,"%s", cmt->cmt);
1097                                 }
1098                                 if (var->sameline)
1099                                         fprintf(f, "%s %s %s  %s", var->name, (var->object ? "=>" : "="), var->value, var->sameline->cmt);
1100                                 else
1101                                         fprintf(f, "%s %s %s\n", var->name, (var->object ? "=>" : "="), var->value);
1102                                 if (var->blanklines) {
1103                                         blanklines = var->blanklines;
1104                                         while (blanklines--)
1105                                                 fprintf(f, "\n");
1106                                 }
1107
1108                                 var = var->next;
1109                         }
1110 #if 0
1111                         /* Put an empty line */
1112                         fprintf(f, "\n");
1113 #endif
1114                         cat = cat->next;
1115                 }
1116                 if ((option_verbose > 1) && !option_debug)
1117                         ast_verbose("Saved\n");
1118         } else {
1119                 if (option_debug)
1120                         ast_log(LOG_DEBUG, "Unable to open for writing: %s (%s)\n", fn, strerror(errno));
1121                 if (option_verbose > 1)
1122                         ast_verbose(VERBOSE_PREFIX_2 "Unable to write %s (%s)", fn, strerror(errno));
1123                 if (fd > -1)
1124                         close(fd);
1125                 return -1;
1126         }
1127         stat(fn, &s);
1128         fchmod(fd, s.st_mode);
1129         fclose(f);
1130         if (unlink(fn) || link(fntmp, fn)) {
1131                 if (option_debug)
1132                         ast_log(LOG_DEBUG, "Unable to open for writing: %s (%s)\n", fn, strerror(errno));
1133                 if (option_verbose > 1)
1134                         ast_verbose(VERBOSE_PREFIX_2 "Unable to write %s (%s)", fn, strerror(errno));
1135                 unlink(fntmp);
1136                 return -1;
1137         }
1138         unlink(fntmp);
1139         return 0;
1140 }
1141
1142 static void clear_config_maps(void)
1143 {
1144         struct ast_config_map *map;
1145
1146         ast_mutex_lock(&config_lock);
1147
1148         while (config_maps) {
1149                 map = config_maps;
1150                 config_maps = config_maps->next;
1151                 free(map);
1152         }
1153
1154         ast_mutex_unlock(&config_lock);
1155 }
1156
1157 static int append_mapping(char *name, char *driver, char *database, char *table)
1158 {
1159         struct ast_config_map *map;
1160         int length;
1161
1162         length = sizeof(*map);
1163         length += strlen(name) + 1;
1164         length += strlen(driver) + 1;
1165         length += strlen(database) + 1;
1166         if (table)
1167                 length += strlen(table) + 1;
1168
1169         if (!(map = ast_calloc(1, length)))
1170                 return -1;
1171
1172         map->name = map->stuff;
1173         strcpy(map->name, name);
1174         map->driver = map->name + strlen(map->name) + 1;
1175         strcpy(map->driver, driver);
1176         map->database = map->driver + strlen(map->driver) + 1;
1177         strcpy(map->database, database);
1178         if (table) {
1179                 map->table = map->database + strlen(map->database) + 1;
1180                 strcpy(map->table, table);
1181         }
1182         map->next = config_maps;
1183
1184         if (option_verbose > 1)
1185                 ast_verbose(VERBOSE_PREFIX_2 "Binding %s to %s/%s/%s\n",
1186                             map->name, map->driver, map->database, map->table ? map->table : map->name);
1187
1188         config_maps = map;
1189         return 0;
1190 }
1191
1192 int read_config_maps(void)
1193 {
1194         struct ast_config *config, *configtmp;
1195         struct ast_variable *v;
1196         char *driver, *table, *database, *stringp, *tmp;
1197
1198         clear_config_maps();
1199
1200         configtmp = ast_config_new();
1201         configtmp->max_include_level = 1;
1202         config = ast_config_internal_load(extconfig_conf, configtmp, 0);
1203         if (!config) {
1204                 ast_config_destroy(configtmp);
1205                 return 0;
1206         }
1207
1208         for (v = ast_variable_browse(config, "settings"); v; v = v->next) {
1209                 stringp = v->value;
1210                 driver = strsep(&stringp, ",");
1211
1212                 if ((tmp = strchr(stringp, '\"')))
1213                         stringp = tmp;
1214
1215                 /* check if the database text starts with a double quote */
1216                 if (*stringp == '"') {
1217                         stringp++;
1218                         database = strsep(&stringp, "\"");
1219                         strsep(&stringp, ",");
1220                 } else {
1221                         /* apparently this text has no quotes */
1222                         database = strsep(&stringp, ",");
1223                 }
1224
1225                 table = strsep(&stringp, ",");
1226
1227                 if (!strcmp(v->name, extconfig_conf)) {
1228                         ast_log(LOG_WARNING, "Cannot bind '%s'!\n", extconfig_conf);
1229                         continue;
1230                 }
1231
1232                 if (!strcmp(v->name, "asterisk.conf")) {
1233                         ast_log(LOG_WARNING, "Cannot bind 'asterisk.conf'!\n");
1234                         continue;
1235                 }
1236
1237                 if (!strcmp(v->name, "logger.conf")) {
1238                         ast_log(LOG_WARNING, "Cannot bind 'logger.conf'!\n");
1239                         continue;
1240                 }
1241
1242                 if (!driver || !database)
1243                         continue;
1244                 if (!strcasecmp(v->name, "sipfriends")) {
1245                         ast_log(LOG_WARNING, "The 'sipfriends' table is obsolete, update your config to use sipusers and sippeers, though they can point to the same table.\n");
1246                         append_mapping("sipusers", driver, database, table ? table : "sipfriends");
1247                         append_mapping("sippeers", driver, database, table ? table : "sipfriends");
1248                 } else if (!strcasecmp(v->name, "iaxfriends")) {
1249                         ast_log(LOG_WARNING, "The 'iaxfriends' table is obsolete, update your config to use iaxusers and iaxpeers, though they can point to the same table.\n");
1250                         append_mapping("iaxusers", driver, database, table ? table : "iaxfriends");
1251                         append_mapping("iaxpeers", driver, database, table ? table : "iaxfriends");
1252                 } else
1253                         append_mapping(v->name, driver, database, table);
1254         }
1255
1256         ast_config_destroy(config);
1257         return 0;
1258 }
1259
1260 int ast_config_engine_register(struct ast_config_engine *new)
1261 {
1262         struct ast_config_engine *ptr;
1263
1264         ast_mutex_lock(&config_lock);
1265
1266         if (!config_engine_list) {
1267                 config_engine_list = new;
1268         } else {
1269                 for (ptr = config_engine_list; ptr->next; ptr=ptr->next);
1270                 ptr->next = new;
1271         }
1272
1273         ast_mutex_unlock(&config_lock);
1274         ast_log(LOG_NOTICE,"Registered Config Engine %s\n", new->name);
1275
1276         return 1;
1277 }
1278
1279 int ast_config_engine_deregister(struct ast_config_engine *del)
1280 {
1281         struct ast_config_engine *ptr, *last=NULL;
1282
1283         ast_mutex_lock(&config_lock);
1284
1285         for (ptr = config_engine_list; ptr; ptr=ptr->next) {
1286                 if (ptr == del) {
1287                         if (last)
1288                                 last->next = ptr->next;
1289                         else
1290                                 config_engine_list = ptr->next;
1291                         break;
1292                 }
1293                 last = ptr;
1294         }
1295
1296         ast_mutex_unlock(&config_lock);
1297
1298         return 0;
1299 }
1300
1301 /*! \brief Find realtime engine for realtime family */
1302 static struct ast_config_engine *find_engine(const char *family, char *database, int dbsiz, char *table, int tabsiz)
1303 {
1304         struct ast_config_engine *eng, *ret = NULL;
1305         struct ast_config_map *map;
1306
1307         ast_mutex_lock(&config_lock);
1308
1309         for (map = config_maps; map; map = map->next) {
1310                 if (!strcasecmp(family, map->name)) {
1311                         if (database)
1312                                 ast_copy_string(database, map->database, dbsiz);
1313                         if (table)
1314                                 ast_copy_string(table, map->table ? map->table : family, tabsiz);
1315                         break;
1316                 }
1317         }
1318
1319         /* Check if the required driver (engine) exist */
1320         if (map) {
1321                 for (eng = config_engine_list; !ret && eng; eng = eng->next) {
1322                         if (!strcasecmp(eng->name, map->driver))
1323                                 ret = eng;
1324                 }
1325         }
1326
1327         ast_mutex_unlock(&config_lock);
1328
1329         /* if we found a mapping, but the engine is not available, then issue a warning */
1330         if (map && !ret)
1331                 ast_log(LOG_WARNING, "Realtime mapping for '%s' found to engine '%s', but the engine is not available\n", map->name, map->driver);
1332
1333         return ret;
1334 }
1335
1336 static struct ast_config_engine text_file_engine = {
1337         .name = "text",
1338         .load_func = config_text_file_load,
1339 };
1340
1341 struct ast_config *ast_config_internal_load(const char *filename, struct ast_config *cfg, int withcomments)
1342 {
1343         char db[256];
1344         char table[256];
1345         struct ast_config_engine *loader = &text_file_engine;
1346         struct ast_config *result;
1347
1348         /* The config file itself bumps include_level by 1 */
1349         if (cfg->max_include_level > 0 && cfg->include_level == cfg->max_include_level + 1) {
1350                 ast_log(LOG_WARNING, "Maximum Include level (%d) exceeded\n", cfg->max_include_level);
1351                 return NULL;
1352         }
1353
1354         cfg->include_level++;
1355
1356         if (strcmp(filename, extconfig_conf) && strcmp(filename, "asterisk.conf") && config_engine_list) {
1357                 struct ast_config_engine *eng;
1358
1359                 eng = find_engine(filename, db, sizeof(db), table, sizeof(table));
1360
1361
1362                 if (eng && eng->load_func) {
1363                         loader = eng;
1364                 } else {
1365                         eng = find_engine("global", db, sizeof(db), table, sizeof(table));
1366                         if (eng && eng->load_func)
1367                                 loader = eng;
1368                 }
1369         }
1370
1371         result = loader->load_func(db, table, filename, cfg, withcomments);
1372
1373         if (result)
1374                 result->include_level--;
1375         else
1376                 cfg->include_level--;
1377
1378         return result;
1379 }
1380
1381 struct ast_config *ast_config_load(const char *filename)
1382 {
1383         struct ast_config *cfg;
1384         struct ast_config *result;
1385
1386         cfg = ast_config_new();
1387         if (!cfg)
1388                 return NULL;
1389
1390         result = ast_config_internal_load(filename, cfg, 0);
1391         if (!result)
1392                 ast_config_destroy(cfg);
1393
1394         return result;
1395 }
1396
1397 struct ast_config *ast_config_load_with_comments(const char *filename)
1398 {
1399         struct ast_config *cfg;
1400         struct ast_config *result;
1401
1402         cfg = ast_config_new();
1403         if (!cfg)
1404                 return NULL;
1405
1406         result = ast_config_internal_load(filename, cfg, 1);
1407         if (!result)
1408                 ast_config_destroy(cfg);
1409
1410         return result;
1411 }
1412
1413 struct ast_variable *ast_load_realtime(const char *family, ...)
1414 {
1415         struct ast_config_engine *eng;
1416         char db[256]="";
1417         char table[256]="";
1418         struct ast_variable *res=NULL;
1419         va_list ap;
1420
1421         va_start(ap, family);
1422         eng = find_engine(family, db, sizeof(db), table, sizeof(table));
1423         if (eng && eng->realtime_func)
1424                 res = eng->realtime_func(db, table, ap);
1425         va_end(ap);
1426
1427         return res;
1428 }
1429
1430 /*! \brief Check if realtime engine is configured for family */
1431 int ast_check_realtime(const char *family)
1432 {
1433         struct ast_config_engine *eng;
1434
1435         eng = find_engine(family, NULL, 0, NULL, 0);
1436         if (eng)
1437                 return 1;
1438         return 0;
1439
1440 }
1441
1442 struct ast_config *ast_load_realtime_multientry(const char *family, ...)
1443 {
1444         struct ast_config_engine *eng;
1445         char db[256]="";
1446         char table[256]="";
1447         struct ast_config *res=NULL;
1448         va_list ap;
1449
1450         va_start(ap, family);
1451         eng = find_engine(family, db, sizeof(db), table, sizeof(table));
1452         if (eng && eng->realtime_multi_func)
1453                 res = eng->realtime_multi_func(db, table, ap);
1454         va_end(ap);
1455
1456         return res;
1457 }
1458
1459 int ast_update_realtime(const char *family, const char *keyfield, const char *lookup, ...)
1460 {
1461         struct ast_config_engine *eng;
1462         int res = -1;
1463         char db[256]="";
1464         char table[256]="";
1465         va_list ap;
1466
1467         va_start(ap, lookup);
1468         eng = find_engine(family, db, sizeof(db), table, sizeof(table));
1469         if (eng && eng->update_func)
1470                 res = eng->update_func(db, table, keyfield, lookup, ap);
1471         va_end(ap);
1472
1473         return res;
1474 }
1475
1476 static int config_command(int fd, int argc, char **argv)
1477 {
1478         struct ast_config_engine *eng;
1479         struct ast_config_map *map;
1480
1481         ast_mutex_lock(&config_lock);
1482
1483         ast_cli(fd, "\n\n");
1484         for (eng = config_engine_list; eng; eng = eng->next) {
1485                 ast_cli(fd, "\nConfig Engine: %s\n", eng->name);
1486                 for (map = config_maps; map; map = map->next)
1487                         if (!strcasecmp(map->driver, eng->name)) {
1488                                 ast_cli(fd, "===> %s (db=%s, table=%s)\n", map->name, map->database,
1489                                         map->table ? map->table : map->name);
1490                         }
1491         }
1492         ast_cli(fd,"\n\n");
1493
1494         ast_mutex_unlock(&config_lock);
1495
1496         return 0;
1497 }
1498
1499 static char show_config_help[] =
1500         "Usage: core show config mappings\n"
1501         "       Shows the filenames to config engines.\n";
1502
1503 static struct ast_cli_entry cli_show_config_mappings_deprecated = {
1504         { "show", "config", "mappings", NULL },
1505         config_command, NULL,
1506         NULL };
1507
1508 static struct ast_cli_entry cli_config[] = {
1509         { { "core", "show", "config", "mappings", NULL },
1510         config_command, "Display config mappings (file names to config engines)",
1511         show_config_help, NULL, &cli_show_config_mappings_deprecated },
1512 };
1513
1514 int register_config_cli()
1515 {
1516         ast_cli_register_multiple(cli_config, sizeof(cli_config) / sizeof(struct ast_cli_entry));
1517         return 0;
1518 }