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