config.c

   1 /*
   2  * Asterisk -- A telephony toolkit for Linux.
   3  *
   4  * Configuration File Parser
   5  *
   6  * Copyright (C) 1999-2004, Digium, Inc.
   7  *
   8  * Mark Spencer <markster@digium.com>
   9  *
  10  * This program is free software, distributed under the terms of
  11  * the GNU General Public License
  12  */
  13
  14 #include <stdio.h>
  15 #include <unistd.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18 #include <errno.h>
  19 #include <time.h>
  20 #define AST_INCLUDE_GLOB 1
  21 #ifdef AST_INCLUDE_GLOB
  22 # include <glob.h>
  23 #endif
  24 #include <asterisk/config.h>
  25 #include <asterisk/config_pvt.h>
  26 #include <asterisk/cli.h>
  27 #include <asterisk/lock.h>
  28 #include <asterisk/options.h>
  29 #include <asterisk/logger.h>
  30 #include <asterisk/utils.h>
  31 #include "asterisk.h"
  32 #include "astconf.h"
  33
  34 #define MAX_NESTED_COMMENTS 128
  35 #define COMMENT_START ";--"
  36 #define COMMENT_END "--;"
  37 #define COMMENT_META ';'
  38 #define COMMENT_TAG '-'
  39
  40 static int ast_cust_config=0;
  41 struct ast_config *(*global_load_func)(const char *dbname, const char *table, const char *, struct ast_config *,struct ast_category **,struct ast_variable **,int);
  42
  43 static struct ast_config_map {
  44         struct ast_config_map *next;
  45         char *name;
  46         char *driver;
  47         char *database;
  48         char *table;
  49         char stuff[0];
  50 } *maps = NULL;
  51
  52 AST_MUTEX_DEFINE_STATIC(ast_cust_config_lock);
  53 static struct ast_config_reg *ast_cust_config_list;
  54 static char *config_conf_file = "extconfig.conf";
  55
  56 void ast_destroy_realtime(struct ast_variable *v)
  57 {
  58         struct ast_variable *vn;
  59         while(v) {
  60                 vn = v;
  61                 v = v->next;
  62                 free(vn);
  63         }
  64 }
  65
  66 void ast_category_destroy(struct ast_category *cat)
  67 {
  68         ast_destroy_realtime(cat->root);
  69         free(cat);
  70 }
  71
  72 void ast_destroy(struct ast_config *ast)
  73 {
  74         struct ast_category *cat, *catn;
  75
  76         if (!ast)
  77                 return;
  78
  79         cat = ast->root;
  80         while(cat) {
  81                 ast_destroy_realtime(cat->root);
  82                 catn = cat;
  83                 cat = cat->next;
  84                 free(catn);
  85         }
  86         free(ast);
  87 }
  88
  89 int ast_true(const char *s)
  90 {
  91         if (!s)
  92                 return 0;
  93         /* Determine if this is a true value */
  94         if (!strcasecmp(s, "yes") ||
  95             !strcasecmp(s, "true") ||
  96                 !strcasecmp(s, "y") ||
  97                 !strcasecmp(s, "t") ||
  98                 !strcasecmp(s, "1") ||
  99                 !strcasecmp(s, "on"))
 100                         return -1;
 101         return 0;
 102 }
 103
 104 int ast_false(const char *s)
 105 {
 106         if (!s)
 107                 return 0;
 108         /* Determine if this is a false value */
 109         if (!strcasecmp(s, "no") ||
 110             !strcasecmp(s, "false") ||
 111                 !strcasecmp(s, "n") ||
 112                 !strcasecmp(s, "f") ||
 113                 !strcasecmp(s, "0") ||
 114                 !strcasecmp(s, "off"))
 115                         return -1;
 116         return 0;
 117 }
 118
 119 struct ast_variable *ast_variable_browse(struct ast_config *config, char *category)
 120 {
 121         struct ast_category *cat;
 122         cat = config->root;
 123         while(cat) {
 124                 if (cat->name == category)
 125                         return cat->root;
 126                 cat = cat->next;
 127         }
 128         cat = config->root;
 129         while(cat) {
 130                 if (!strcasecmp(cat->name, category))
 131                         return cat->root;
 132                 cat = cat->next;
 133         }
 134         return NULL;
 135 }
 136
 137 char *ast_variable_retrieve(struct ast_config *config, char *category, char *value)
 138 {
 139         struct ast_variable *v;
 140         if (category) {
 141                 v = ast_variable_browse(config, category);
 142                 while (v) {
 143                         if (value == v->name)
 144                                 return v->value;
 145                         v=v->next;
 146                 }
 147                 v = ast_variable_browse(config, category);
 148                 while (v) {
 149                         if (!strcasecmp(value, v->name))
 150                                 return v->value;
 151                         v=v->next;
 152                 }
 153         } else {
 154                 struct ast_category *cat;
 155                 cat = config->root;
 156                 while(cat) {
 157                         v = cat->root;
 158                         while (v) {
 159                                 if (!strcasecmp(value, v->name))
 160                                         return v->value;
 161                                 v=v->next;
 162                         }
 163                         cat = cat->next;
 164                 }
 165         }
 166         return NULL;
 167 }
 168
 169 int ast_category_exist(struct ast_config *config, char *category_name)
 170 {
 171         struct ast_category *category = NULL;
 172
 173         category = config->root;
 174
 175         while(category) {
 176                 if (!strcasecmp(category->name,category_name))
 177                         return 1;
 178                 category = category->next;
 179         }
 180
 181         return 0;
 182 }
 183
 184
 185 static struct ast_config_reg *get_ast_cust_config_keyword(const char *name, char *database, int dbsiz, char *table, int tabsiz)
 186 {
 187         struct ast_config_reg *reg,*ret=NULL;
 188         struct ast_config_map *map;
 189
 190         ast_mutex_lock(&ast_cust_config_lock);
 191         map = maps;
 192         while(map) {
 193                 if (!strcasecmp(name, map->name)) {
 194                         strncpy(database, map->database, dbsiz - 1);
 195                         if (map->table)
 196                                 strncpy(table, map->table, tabsiz - 1);
 197                         else
 198                                 strncpy(table, name, tabsiz - 1);
 199                         break;
 200                 }
 201                 map = map->next;
 202         }
 203         if (map) {
 204                 for (reg=ast_cust_config_list;reg && !ret;reg=reg->next) {
 205                         if (!strcmp(reg->name,map->driver))
 206                                 ret=reg;
 207                 }
 208         }
 209         ast_mutex_unlock(&ast_cust_config_lock);
 210         return ret;
 211 }
 212
 213 void ast_config_destroy_all(void)
 214 {
 215         struct ast_config_reg *key;
 216         ast_mutex_lock(&ast_cust_config_lock);
 217         for (key=ast_cust_config_list;key;key=key->next) {
 218                 ast_config_deregister(key);
 219         }
 220         ast_cust_config_list = NULL;
 221         ast_mutex_unlock(&ast_cust_config_lock);
 222 }
 223
 224 static struct ast_config_reg *get_config_registrations(void)
 225 {
 226         return ast_cust_config_list;
 227 }
 228
 229
 230 static struct ast_config *__ast_load(const char *configfile, struct ast_config *tmp, struct ast_category **_tmpc, struct ast_variable **_last, int includelevel);
 231
 232 static int cfg_process(struct ast_config *tmp, struct ast_category **_tmpc, struct ast_variable **_last, char *buf, int lineno, const char *configfile, int includelevel )
 233 {
 234         char *c;
 235         char *cur;
 236         char *arg=NULL;
 237         struct ast_variable *v;
 238         int object;
 239         cur = ast_strip(buf);
 240         if (!ast_strlen_zero(cur)) {
 241                 /* Actually parse the entry */
 242                 if (cur[0] == '[') {
 243                         /* A category header */
 244                         c = strchr(cur, ']');
 245                         if (c) {
 246                                 *c = 0;
 247                                 *_tmpc = malloc(sizeof(struct ast_category));
 248                                 if (!*_tmpc) {
 249                                         ast_destroy(tmp);
 250                                         ast_log(LOG_WARNING,
 251                                                 "Out of memory, line %d\n", lineno);
 252                                         return -1;
 253                                 }
 254                                 memset(*_tmpc, 0, sizeof(struct ast_category));
 255                                 strncpy((*_tmpc)->name, cur+1, sizeof((*_tmpc)->name) - 1);
 256                                 (*_tmpc)->root =  NULL;
 257                                 if (!tmp->prev)
 258                                         tmp->root = *_tmpc;
 259                                 else
 260                                         tmp->prev->next = *_tmpc;
 261
 262                                 tmp->prev = *_tmpc;
 263                                 *_last =  NULL;
 264                         } else {
 265                                 ast_log(LOG_WARNING,
 266                                         "parse error: no closing ']', line %d of %s\n", lineno, configfile);
 267                         }
 268                 } else if (cur[0] == '#') {
 269                         /* A directive */
 270                         cur++;
 271                         c = cur;
 272                         while(*c && (*c > 32)) c++;
 273                         if (*c) {
 274                                 *c = '\0';
 275                                 c++;
 276                                 /* Find real argument */
 277                                 while(*c  && (*c < 33)) c++;
 278                                 if (!*c)
 279                                         c = NULL;
 280                         } else
 281                                 c = NULL;
 282                         if (!strcasecmp(cur, "include")) {
 283                                 /* A #include */
 284                                 if (c) {
 285                                         while((*c == '<') || (*c == '>') || (*c == '\"')) c++;
 286                                         /* Get rid of leading mess */
 287                                         cur = c;
 288                                         while (!ast_strlen_zero(cur)) {
 289                                                 c = cur + strlen(cur) - 1;
 290                                                 if ((*c == '>') || (*c == '<') || (*c == '\"'))
 291                                                         *c = '\0';
 292                                                 else
 293                                                         break;
 294                                         }
 295
 296                                         if((c = strchr(cur,':'))) {
 297                                                 *c = '\0';
 298                                                 c++;
 299                                                 arg = c;
 300                                         }
 301
 302                                         if (includelevel < MAX_INCLUDE_LEVEL) {
 303                                                 if(arg && cur) {
 304                                                         ast_log(LOG_WARNING, "Including files with explicit config engine no longer permitted.  Please use extconfig.conf to specify all mappings\n");
 305                                                 } else {
 306                                                         if (!__ast_load(cur, tmp, _tmpc, _last, includelevel + 1))
 307                                                                 return -1;
 308                                                 }
 309                                         } else
 310                                                 ast_log(LOG_WARNING, "Maximum Include level (%d) exceeded\n", includelevel);
 311                                 } else
 312                                         ast_log(LOG_WARNING, "Directive '#include' needs an argument (filename) at line %d of %s\n", lineno, configfile);
 313                                 /* Strip off leading and trailing "'s and <>'s */
 314                         }
 315                         else
 316                                 ast_log(LOG_WARNING, "Unknown directive '%s' at line %d of %s\n", cur, lineno, configfile);
 317                 } else {
 318                         /* Just a line (variable = value) */
 319                         if (!*_tmpc) {
 320                                 ast_log(LOG_WARNING,
 321                                         "parse error: No category context for line %d of %s\n", lineno, configfile);
 322                                 ast_destroy(tmp);
 323                                 return -1;
 324                         }
 325                         c = strchr(cur, '=');
 326                         if (c) {
 327                                 *c = 0;
 328                                 c++;
 329                                 /* Ignore > in => */
 330                                 if (*c== '>') {
 331                                         object = 1;
 332                                         c++;
 333                                 } else
 334                                         object = 0;
 335                                 v = ast_new_variable(ast_strip(cur), ast_strip(c));
 336                                 if (v) {
 337                                         v->next = NULL;
 338                                         v->lineno = lineno;
 339                                         v->object = object;
 340                                         /* Put and reset comments */
 341                                         v->blanklines = 0;
 342                                         if (*_last)
 343                                                 (*_last)->next = v;
 344                                         else
 345                                                 (*_tmpc)->root = v;
 346                                         *_last = v;
 347                                 } else {
 348                                         ast_destroy(tmp);
 349                                         ast_log(LOG_WARNING, "Out of memory, line %d\n", lineno);
 350                                         return -1;
 351                                 }
 352                         } else {
 353                                 ast_log(LOG_WARNING, "No '=' (equal sign) in line %d of %s\n", lineno, configfile);
 354                         }
 355
 356                 }
 357         }
 358         return 0;
 359 }
 360
 361 int ast_save(char *configfile, struct ast_config *cfg, char *generator)
 362 {
 363         FILE *f;
 364         char fn[256];
 365         char date[256]="";
 366         time_t t;
 367         struct ast_variable *var;
 368         struct ast_category *cat;
 369         int blanklines = 0;
 370         if (configfile[0] == '/') {
 371                 strncpy(fn, configfile, sizeof(fn)-1);
 372         } else {
 373                 snprintf(fn, sizeof(fn), "%s/%s", AST_CONFIG_DIR, configfile);
 374         }
 375         time(&t);
 376         strncpy(date, ctime(&t), sizeof(date) - 1);
 377         if ((f = fopen(fn, "w"))) {
 378                 if ((option_verbose > 1) && !option_debug)
 379                         ast_verbose(  VERBOSE_PREFIX_2 "Saving '%s': ", fn);
 380                 fprintf(f, ";!\n");
 381                 fprintf(f, ";! Automatically generated configuration file\n");
 382                 fprintf(f, ";! Filename: %s (%s)\n", configfile, fn);
 383                 fprintf(f, ";! Generator: %s\n", generator);
 384                 fprintf(f, ";! Creation Date: %s", date);
 385                 fprintf(f, ";!\n");
 386                 cat = cfg->root;
 387                 while(cat) {
 388                         /* Dump section with any appropriate comment */
 389                         fprintf(f, "[%s]\n", cat->name);
 390                         var = cat->root;
 391                         while(var) {
 392                                 if (var->sameline)
 393                                         fprintf(f, "%s %s %s  ; %s\n", var->name, (var->object ? "=>" : "="), var->value, var->sameline->cmt);
 394                                 else
 395                                         fprintf(f, "%s %s %s\n", var->name, (var->object ? "=>" : "="), var->value);
 396                                 if (var->blanklines) {
 397                                         blanklines = var->blanklines;
 398                                         while (blanklines) {
 399                                                 fprintf(f, "\n");
 400                                                 blanklines--;
 401                                         }
 402                                 }
 403
 404                                 var = var->next;
 405                         }
 406 #if 0
 407                         /* Put an empty line */
 408                         fprintf(f, "\n");
 409 #endif
 410                         cat = cat->next;
 411                 }
 412         } else {
 413                 if (option_debug)
 414                         printf("Unable to open for writing: %s\n", fn);
 415                 else if (option_verbose > 1)
 416                         printf( "Unable to write (%s)", strerror(errno));
 417                 return -1;
 418         }
 419         fclose(f);
 420         return 0;
 421 }
 422
 423
 424 struct ast_variable *ast_load_realtime(const char *family, ...)
 425 {
 426         struct ast_config_reg *reg;
 427         char db[256]="";
 428         char table[256]="";
 429         struct ast_variable *res=NULL;
 430         va_list ap;
 431         va_start(ap, family);
 432         reg = get_ast_cust_config_keyword(family, db, sizeof(db), table, sizeof(table));
 433         if (reg && reg->realtime_func)
 434                 res = reg->realtime_func(db, table, ap);
 435         va_end(ap);
 436         return res;
 437 }
 438
 439 struct ast_config *ast_load_realtime_multientry(const char *family, ...)
 440 {
 441         struct ast_config_reg *reg;
 442         char db[256]="";
 443         char table[256]="";
 444         struct ast_config *res=NULL;
 445         va_list ap;
 446         va_start(ap, family);
 447         reg = get_ast_cust_config_keyword(family, db, sizeof(db), table, sizeof(table));
 448         if (reg && reg->realtime_multi_func)
 449                 res = reg->realtime_multi_func(db, table, ap);
 450         va_end(ap);
 451         return res;
 452 }
 453
 454 int ast_update_realtime(const char *family, const char *keyfield, const char *lookup, ...)
 455 {
 456         struct ast_config_reg *reg;
 457         int res = -1;
 458         char db[256]="";
 459         char table[256]="";
 460         va_list ap;
 461         va_start(ap, lookup);
 462         reg = get_ast_cust_config_keyword(family, db, sizeof(db), table, sizeof(table));
 463         if (reg && reg->update_func)
 464                 res = reg->update_func(db, table, keyfield, lookup, ap);
 465         va_end(ap);
 466         return res;
 467 }
 468
 469 static struct ast_config *__ast_load(const char *configfile, struct ast_config *tmp, struct ast_category **_tmpc, struct ast_variable **_last, int includelevel)
 470 {
 471         char fn[256];
 472         char buf[8192];
 473         char db[256];
 474         char table[256];
 475         FILE *f;
 476         int lineno=0;
 477         int master=0;
 478         int comment = 0, nest[MAX_NESTED_COMMENTS];
 479
 480         struct ast_config_reg *reg=NULL;
 481         struct ast_config *(*load_func)(const char *database, const char *table, const char *, struct ast_config *,struct ast_category **,struct ast_variable **,int);
 482         char *comment_p, *process_buf, *new_buf=NULL;
 483
 484         load_func=NULL;
 485         if (strcmp(configfile,config_conf_file) && strcmp(configfile,"asterisk.conf") && ast_cust_config_list) {
 486                 if (global_load_func) {
 487                         load_func = global_load_func;
 488                 } else {
 489                         reg = get_ast_cust_config_keyword(configfile, db, sizeof(db), table, sizeof(table));
 490                         if (reg && reg->static_func) {
 491                                 load_func = reg->static_func;
 492                         } else {
 493                                 reg = get_ast_cust_config_keyword(configfile, db, sizeof(db), table, sizeof(table));
 494                                 if (reg && reg->static_func)
 495                                         global_load_func = load_func = reg->static_func;
 496                         }
 497                 }
 498
 499                 if (load_func) {
 500                         ast_log(LOG_NOTICE,"Loading Config %s via %s engine\n",configfile,reg && reg->name ? reg->name : "global");
 501                         if((tmp = load_func(db, table, configfile,tmp, _tmpc, _last, includelevel)))
 502                                 return tmp;
 503                 }
 504         }
 505
 506         if (configfile[0] == '/') {
 507                 strncpy(fn, configfile, sizeof(fn)-1);
 508         } else {
 509                 snprintf(fn, sizeof(fn), "%s/%s", (char *)ast_config_AST_CONFIG_DIR, configfile);
 510         }
 511 #ifdef AST_INCLUDE_GLOB
 512         {
 513                 int glob_ret;
 514                 glob_t globbuf;
 515                 globbuf.gl_offs = 0;    /* initialize it to silence gcc */
 516 #ifdef SOLARIS
 517                 glob_ret = glob(fn, GLOB_NOMAGIC, NULL, &globbuf);
 518 #else
 519                 glob_ret = glob(fn, GLOB_NOMAGIC|GLOB_BRACE, NULL, &globbuf);
 520 #endif
 521                 if (glob_ret == GLOB_NOSPACE)
 522                         ast_log(LOG_WARNING,
 523                                 "Glob Expansion of pattern '%s' failed: Not enough memory\n", fn);
 524                 else if (glob_ret  == GLOB_ABORTED)
 525                         ast_log(LOG_WARNING,
 526                                 "Glob Expansion of pattern '%s' failed: Read error\n", fn);
 527                 else  {
 528                         /* loop over expanded files */
 529                         int i;
 530                         for (i=0; i<globbuf.gl_pathc; i++) {
 531                                 strncpy(fn, globbuf.gl_pathv[i], sizeof(fn)-1);
 532 #endif
 533         if ((option_verbose > 1) && !option_debug) {
 534                 ast_verbose(  VERBOSE_PREFIX_2 "Parsing '%s': ", fn);
 535                 fflush(stdout);
 536         }
 537         if ((f = fopen(fn, "r"))) {
 538                 if (option_debug)
 539                         ast_log(LOG_DEBUG, "Parsing %s\n", fn);
 540                 else if (option_verbose > 2)
 541                         ast_verbose( "Found\n");
 542                 if (!tmp) {
 543                         if((tmp = malloc(sizeof(struct ast_config)))) {
 544                                 memset(tmp, 0, sizeof(struct ast_config));
 545                                 master = 1;
 546                         }
 547                 }
 548                 if (tmp) {
 549                         while(!feof(f)) {
 550                                 lineno++;
 551                                 if (fgets(buf, sizeof(buf), f)) {
 552                                         new_buf = buf;
 553                                         if (comment)
 554                                                 process_buf = NULL;
 555                                         else
 556                                                 process_buf = buf;
 557                                         while ((comment_p = strchr(new_buf, COMMENT_META))) {
 558                                                 if ((comment_p > new_buf) && (*(comment_p-1) == '\\')) {
 559                                                         /* Yuck, gotta memmove */
 560                                                         memmove(comment_p - 1, comment_p, strlen(comment_p) + 1);
 561                                                         new_buf = comment_p;
 562                                                 } else if(comment_p[1] == COMMENT_TAG && comment_p[2] == COMMENT_TAG && (comment_p[3] != '-')) {
 563                                                         /* Meta-Comment start detected ";--" */
 564                                                         if (comment < MAX_NESTED_COMMENTS) {
 565                                                                 *comment_p = '\0';
 566                                                                 new_buf = comment_p + 3;
 567                                                                 comment++;
 568                                                                 nest[comment-1] = lineno;
 569                                                         } else {
 570                                                                 ast_log(LOG_ERROR, "Maximum nest limit of %d reached.\n", MAX_NESTED_COMMENTS);
 571                                                         }
 572                                                 } else if ((comment_p >= new_buf + 2) &&
 573                                                                    (*(comment_p - 1) == COMMENT_TAG) &&
 574                                                                    (*(comment_p - 2) == COMMENT_TAG)) {
 575                                                         /* Meta-Comment end detected */
 576                                                         comment--;
 577                                                         new_buf = comment_p + 1;
 578                                                         if (!comment) {
 579                                                                 /* Back to non-comment now */
 580                                                                 if (process_buf) {
 581                                                                         /* Actually have to move what's left over the top, then continue */
 582                                                                         char *oldptr;
 583                                                                         oldptr = process_buf + strlen(process_buf);
 584                                                                         memmove(oldptr, new_buf, strlen(new_buf) + 1);
 585                                                                         new_buf = oldptr;
 586                                                                 } else
 587                                                                         process_buf = new_buf;
 588                                                         }
 589                                                 } else {
 590                                                         if (!comment) {
 591                                                                 /* If ; is found, and we are not nested in a comment,
 592                                                                    we immediately stop all comment processing */
 593                                                                 *comment_p = '\0';
 594                                                                 new_buf = comment_p;
 595                                                         } else
 596                                                                 new_buf = comment_p + 1;
 597                                                 }
 598                                         }
 599                                         if (process_buf && cfg_process(tmp, _tmpc, _last, process_buf, lineno, fn, includelevel)) {
 600                                                 tmp = NULL;
 601                                                 break;
 602                                         }
 603                                 }
 604                         }
 605                 } else
 606                         ast_log(LOG_WARNING, "Out of memory\n");
 607
 608                 fclose(f);
 609         } else { /* can't open file */
 610                 if (option_debug)
 611                         ast_log(LOG_DEBUG, "No file to parse: %s\n", fn);
 612                 else if (option_verbose > 2)
 613                         ast_verbose( "Not found (%s)\n", strerror(errno));
 614         }
 615         if (comment) {
 616                 ast_log(LOG_WARNING,"Unterminated comment detected beginning on line %d\n", nest[comment]);
 617         }
 618 #ifdef AST_INCLUDE_GLOB
 619                                         if (!tmp)
 620                                                 break;
 621                                 }
 622                                 globfree(&globbuf);
 623                         }
 624                 }
 625 #endif
 626
 627         return tmp;
 628 }
 629
 630 int ast_config_register(struct ast_config_reg *new)
 631 {
 632         struct ast_config_reg *ptr;
 633         ast_mutex_lock(&ast_cust_config_lock);
 634         if (!ast_cust_config_list) {
 635                 ast_cust_config_list = new;
 636         } else {
 637                 for(ptr=ast_cust_config_list;ptr->next;ptr=ptr->next);
 638                         ptr->next = new;
 639         }
 640         ast_mutex_unlock(&ast_cust_config_lock);
 641         ast_log(LOG_NOTICE,"Registered Config Engine %s\n",new->name);
 642         return 1;
 643 }
 644
 645 int ast_config_deregister(struct ast_config_reg *del)
 646 {
 647         struct ast_config_reg *ptr=NULL,*last=NULL;
 648         ast_mutex_lock(&ast_cust_config_lock);
 649         for (ptr=ast_cust_config_list;ptr;ptr=ptr->next) {
 650                 if (ptr == del) {
 651                         if (last && ptr->next) {
 652                                 last->next = ptr->next;
 653                         } else if (last && ! ptr->next) {
 654                                 last->next = NULL;
 655                         } else if (!last && ptr->next) {
 656                                 ast_cust_config_list = ptr->next;
 657                         } else if (!last && !ptr->next) {
 658                                 ast_cust_config_list = NULL;
 659                         }
 660                 }
 661                 last = ptr;
 662         }
 663         ast_mutex_unlock(&ast_cust_config_lock);
 664         return 0;
 665 }
 666
 667 int ast_cust_config_active(void) {
 668         return (ast_cust_config >0) ? 1 : 0;
 669 }
 670
 671 struct ast_config *ast_load(char *configfile)
 672 {
 673         struct ast_category *tmpc=NULL;
 674         struct ast_variable *last = NULL;
 675
 676         return __ast_load(configfile, NULL, &tmpc, &last, 0);
 677 }
 678
 679 void ast_category_append(struct ast_config *config, struct ast_category *cat)
 680 {
 681         struct ast_category *prev = NULL;
 682         cat->next = NULL;
 683         if (config->root) {
 684                 prev = config->root;
 685                 while(prev->next) prev = prev->next;
 686                 prev->next = cat;
 687         } else
 688                 config->root = cat;
 689 }
 690
 691 char *ast_category_browse(struct ast_config *config, char *prev)
 692 {
 693         struct ast_category *cat;
 694         if (!prev) {
 695                 if (config->root)
 696                         return config->root->name;
 697                 else
 698                         return NULL;
 699         }
 700         cat = config->root;
 701         while(cat) {
 702                 if (cat->name == prev) {
 703                         if (cat->next)
 704                                 return cat->next->name;
 705                         else
 706                                 return NULL;
 707                 }
 708                 cat = cat->next;
 709         }
 710         cat = config->root;
 711         while(cat) {
 712                 if (!strcasecmp(cat->name, prev)) {
 713                         if (cat->next)
 714                                 return cat->next->name;
 715                         else
 716                                 return NULL;
 717                 }
 718                 cat = cat->next;
 719         }
 720         return NULL;
 721 }
 722
 723
 724 struct ast_config *ast_new_config(void)
 725 {
 726         struct ast_config *config;
 727         config = malloc(sizeof(struct ast_config));
 728         memset(config,0,sizeof(struct ast_config));
 729         return config;
 730 }
 731
 732
 733
 734 struct ast_category *ast_new_category(char *name)
 735 {
 736         struct ast_category *category;
 737         category = malloc(sizeof(struct ast_category));
 738         if (category) {
 739                 memset(category,0,sizeof(struct ast_category));
 740                 strncpy(category->name,name,sizeof(category->name) - 1);
 741         }
 742         return category;
 743 }
 744
 745
 746 struct ast_variable *ast_new_variable(char *name, char *value)
 747 {
 748         struct ast_variable *variable;
 749         int length = strlen(name) + strlen(value) + 2 + sizeof(struct ast_variable);
 750         variable = malloc(length);
 751         if (variable) {
 752                 memset(variable, 0, length);
 753                 variable->name = variable->stuff;
 754                 variable->value = variable->stuff + strlen(name) + 1;
 755                 variable->object=0;
 756                 strcpy(variable->name,name);
 757                 strcpy(variable->value,value);
 758         }
 759         return variable;
 760 }
 761
 762 int ast_cust_config_register(struct ast_config_reg *new)
 763 {
 764         ast_config_register(new);
 765         read_ast_cust_config();
 766         return 1;
 767 }
 768 int ast_cust_config_deregister(struct ast_config_reg *new)
 769 {
 770         ast_config_deregister(new);
 771         read_ast_cust_config();
 772         return 1;
 773 }
 774
 775 static void clear_cust_keywords(void)
 776 {
 777         struct ast_config_map *map, *prev;
 778         ast_mutex_lock(&ast_cust_config_lock);
 779         map = maps;
 780         while(map) {
 781                 prev = map;
 782                 map = map->next;
 783                 free(prev);
 784         }
 785         maps = NULL;
 786         ast_mutex_unlock(&ast_cust_config_lock);
 787 }
 788
 789 static int config_command(int fd, int argc, char **argv)
 790 {
 791         struct ast_config_reg *key;
 792         struct ast_config_map *map;
 793
 794         ast_cli(fd,"\n\n");
 795         ast_mutex_lock(&ast_cust_config_lock);
 796         for (key=get_config_registrations();key;key=key->next) {
 797                 ast_cli(fd,"\nConfig Engine: %s\n",key->name);
 798                 map = maps;
 799                 while(map) {
 800                         if (!strcasecmp(map->driver, key->name))
 801                                 ast_cli(fd,"===> %s (db=%s, table=%s)\n",map->name, map->database, map->table ? map->table : map->name);
 802                         map = map->next;
 803                 }
 804         }
 805         ast_mutex_unlock(&ast_cust_config_lock);
 806         ast_cli(fd,"\n\n");
 807
 808         return 0;
 809 }
 810
 811 static struct ast_cli_entry config_command_struct = {
 812   { "show","config","handles", NULL }, config_command,
 813   "Show Config Handles", NULL };
 814
 815 int register_config_cli()
 816 {
 817         return ast_cli_register(&config_command_struct);
 818 }
 819
 820 int read_ast_cust_config(void)
 821 {
 822         char *cfg = config_conf_file;
 823         struct ast_config *config;
 824         struct ast_variable *v;
 825         struct ast_config_map *map;
 826         int length;
 827         char *driver, *table, *database, *stringp;
 828
 829         clear_cust_keywords();
 830         config = ast_load(cfg);
 831         if (config) {
 832                 for (v = ast_variable_browse(config,"settings");v;v=v->next) {
 833                         stringp = v->value;
 834                         driver = strsep(&stringp, ",");
 835                         database = strsep(&stringp, ",");
 836                         table = strsep(&stringp, ",");
 837
 838                         if (!strcmp(v->name,config_conf_file) || !strcmp(v->name,"asterisk.conf")) {
 839                                 ast_log(LOG_WARNING, "Cannot bind asterisk.conf or extconfig.conf!\n");
 840                         } else if (driver && database) {
 841                                 length = sizeof(struct ast_config_map);
 842                                 length += strlen(v->name) + 1;
 843                                 length += strlen(driver) + 1;
 844                                 length += strlen(database) + 1;
 845                                 if (table)
 846                                         length += strlen(table) + 1;
 847                                 map = malloc(length);
 848                                 if (map) {
 849                                         memset(map, 0, length);
 850                                         map->name = map->stuff;
 851                                         strcpy(map->name, v->name);
 852                                         map->driver = map->name + strlen(map->name) + 1;
 853                                         strcpy(map->driver, driver);
 854                                         map->database = map->driver + strlen(map->driver) + 1;
 855                                         strcpy(map->database, database);
 856                                         if (table) {
 857                                                 map->table = map->database + strlen(map->database) + 1;
 858                                                 strcpy(map->table, table);
 859                                         } else
 860                                                 map->table = NULL;
 861                                         map->next = maps;
 862                                         if (option_verbose > 1)
 863                                                 ast_verbose(VERBOSE_PREFIX_2 "Binding %s to %s/%s/%s\n",map->name,map->driver, map->database, map->table ? map->table : map->name);
 864                                         maps = map;
 865                                 }
 866                         }
 867                 }
 868
 869                 ast_destroy(config);
 870         }
 871
 872         return 0;
 873 }