add missing ~ to ast_parse_allow_deny that was breaking disallow
[asterisk/asterisk.git] / config.c
index d758d7f..06fd123 100755 (executable)
--- a/config.c
+++ b/config.c
@@ -3,9 +3,9 @@
  *
  * Configuration File Parser
  * 
- * Copyright (C) 1999, Mark Spencer
+ * Copyright (C) 1999-2004, Digium, Inc.
  *
- * Mark Spencer <markster@linux-support.net>
+ * Mark Spencer <markster@digium.com>
  *
  * This program is free software, distributed under the terms of
  * the GNU General Public License
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#include <time.h>
 #include <asterisk/config.h>
+#include <asterisk/config_pvt.h>
+#include <asterisk/cli.h>
+#include <asterisk/lock.h>
 #include <asterisk/options.h>
 #include <asterisk/logger.h>
+#include <asterisk/utils.h>
 #include "asterisk.h"
+#include "astconf.h"
 
-#define MAX_INCLUDE_LEVEL 10
 
-struct ast_category {
-       char name[80];
-       struct ast_variable *root;
-       struct ast_category *next;
-};
+static int ast_cust_config=0;
+struct ast_config *(*global_load_func)(const char *dbname, const char *table, const char *, struct ast_config *,struct ast_category **,struct ast_variable **,int);
 
-struct ast_config {
-       /* Maybe this structure isn't necessary but we'll keep it
-          for now */
-       struct ast_category *root;
-};
+static struct ast_config_map {
+       struct ast_config_map *next;
+       char *name;
+       char *driver;
+       char *database;
+       char *table;
+       char stuff[0];
+} *maps = NULL;
 
-static char *strip(char *buf)
+AST_MUTEX_DEFINE_STATIC(ast_cust_config_lock);
+static struct ast_config_reg *ast_cust_config_list;
+static char *config_conf_file = "extconfig.conf";
+
+void ast_destroy_realtime(struct ast_variable *v)
+{
+       struct ast_variable *vn;
+       while(v) {
+               vn = v;
+               v = v->next;
+               free(vn);
+       }
+}
+
+void ast_category_destroy(struct ast_category *cat)
 {
-       char *start;
-       /* Strip off trailing whitespace, returns, etc */
-       while(strlen(buf) && (buf[strlen(buf)-1]<33))
-               buf[strlen(buf)-1] = '\0';
-       start = buf;
-       /* Strip off leading whitespace, returns, etc */
-       while(*start && (*start < 33))
-               *start++ = '\0';
-       return start;
+       ast_destroy_realtime(cat->root);
+       free(cat);
 }
 
 void ast_destroy(struct ast_config *ast)
 {
        struct ast_category *cat, *catn;
-       struct ast_variable *v, *vn;
 
        if (!ast)
                return;
 
        cat = ast->root;
        while(cat) {
-               v = cat->root;
-               while(v) {
-                       vn = v;
-                       free(v->name);
-                       free(v->value);
-                       v = v->next;
-                       free(vn);
-               }
+               ast_destroy_realtime(cat->root);
                catn = cat;
                cat = cat->next;
                free(catn);
@@ -73,7 +77,7 @@ void ast_destroy(struct ast_config *ast)
        free(ast);
 }
 
-int ast_true(char *s)
+int ast_true(const char *s)
 {
        if (!s)
                return 0;
@@ -82,7 +86,23 @@ int ast_true(char *s)
            !strcasecmp(s, "true") ||
                !strcasecmp(s, "y") ||
                !strcasecmp(s, "t") ||
-               !strcasecmp(s, "1"))
+               !strcasecmp(s, "1") ||
+               !strcasecmp(s, "on"))
+                       return -1;
+       return 0;
+}
+
+int ast_false(const char *s)
+{
+       if (!s)
+               return 0;
+       /* Determine if this is a false value */
+       if (!strcasecmp(s, "no") ||
+           !strcasecmp(s, "false") ||
+               !strcasecmp(s, "n") ||
+               !strcasecmp(s, "f") ||
+               !strcasecmp(s, "0") ||
+               !strcasecmp(s, "off"))
                        return -1;
        return 0;
 }
@@ -152,18 +172,74 @@ int ast_category_exist(struct ast_config *config, char *category_name)
        return 0;
 }
 
-static struct ast_config *__ast_load(char *configfile, struct ast_config *tmp, struct ast_category **_tmpc, struct ast_variable **_last, int includelevel);
-static int cfg_process(struct ast_config *tmp, struct ast_category **_tmpc, struct ast_variable **_last, char *buf, int lineno, char *configfile, int includelevel)
+
+static struct ast_config_reg *get_ast_cust_config_keyword(const char *name, char *database, int dbsiz, char *table, int tabsiz) 
+{
+       struct ast_config_reg *reg,*ret=NULL;
+       struct ast_config_map *map;
+
+       ast_mutex_lock(&ast_cust_config_lock);
+       map = maps;
+       while(map) {
+               if (!strcasecmp(name, map->name)) {
+                       strncpy(database, map->database, dbsiz - 1);
+                       if (map->table)
+                               strncpy(table, map->table, tabsiz - 1);
+                       else
+                               strncpy(table, name, tabsiz - 1);
+                       break;
+               }
+               map = map->next;
+       }
+       if (map) {
+               for (reg=ast_cust_config_list;reg && !ret;reg=reg->next) {
+                       if (!strcmp(reg->name,map->driver))
+                               ret=reg;
+               }
+       }
+       ast_mutex_unlock(&ast_cust_config_lock);
+       return ret;
+}
+
+void ast_config_destroy_all(void) 
+{
+       struct ast_config_reg *key;
+       ast_mutex_lock(&ast_cust_config_lock);
+       for (key=ast_cust_config_list;key;key=key->next) {
+               ast_config_deregister(key);
+       }
+       ast_cust_config_list = NULL;
+       ast_mutex_unlock(&ast_cust_config_lock);
+}
+
+static struct ast_config_reg *get_config_registrations(void) 
+{
+       return ast_cust_config_list;
+}
+
+
+static struct ast_config *__ast_load(const char *configfile, struct ast_config *tmp, struct ast_category **_tmpc, struct ast_variable **_last, int includelevel);
+
+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 )
 {
        char *c;
        char *cur;
+       char *arg=NULL;
        struct ast_variable *v;
+       int object;
        /* Strip off lines using ; as comment */
        c = strchr(buf, ';');
-       if (c)
-               *c = '\0';
-       cur = strip(buf);
-       if (strlen(cur)) {
+       while (c) {
+               if ((c == buf) || (*(c-1) != '\\')) {
+                       *c = '\0';
+               } else {
+                       *(c-1) = ';';
+                       memmove(c, c + 1, strlen(c + 1));
+               }
+               c = strchr(c + 1, ';');
+       }
+       cur = ast_strip(buf);
+       if (!ast_strlen_zero(cur)) {
                /* Actually parse the entry */
                if (cur[0] == '[') {
                        /* A category header */
@@ -180,8 +256,12 @@ static int cfg_process(struct ast_config *tmp, struct ast_category **_tmpc, stru
                                memset(*_tmpc, 0, sizeof(struct ast_category));
                                strncpy((*_tmpc)->name, cur+1, sizeof((*_tmpc)->name) - 1);
                                (*_tmpc)->root =  NULL;
-                               (*_tmpc)->next = tmp->root;
-                               tmp->root = *_tmpc;
+                               if (!tmp->prev)
+                                       tmp->root = *_tmpc;
+                               else
+                                       tmp->prev->next = *_tmpc;
+
+                               tmp->prev = *_tmpc;
                                *_last =  NULL;
                        } else {
                                ast_log(LOG_WARNING, 
@@ -207,43 +287,60 @@ static int cfg_process(struct ast_config *tmp, struct ast_category **_tmpc, stru
                                        while((*c == '<') || (*c == '>') || (*c == '\"')) c++;
                                        /* Get rid of leading mess */
                                        cur = c;
-                                       while(strlen(cur)) {
+                                       while (!ast_strlen_zero(cur)) {
                                                c = cur + strlen(cur) - 1;
                                                if ((*c == '>') || (*c == '<') || (*c == '\"'))
                                                        *c = '\0';
                                                else
                                                        break;
                                        }
+                                       
+                                       if((c = strchr(cur,':'))) {
+                                               *c = '\0';
+                                               c++;
+                                               arg = c;
+                                       }
+                                       
                                        if (includelevel < MAX_INCLUDE_LEVEL) {
-                                               __ast_load(cur, tmp, _tmpc, _last, includelevel + 1);
-                                       } else 
+                                               if(arg && cur) {
+                                                       ast_log(LOG_WARNING, "Including files with explicit config engine no longer permitted.  Please use extconfig.conf to specify all mappings\n");
+                                               } else {
+                                                       __ast_load(cur, tmp, _tmpc, _last, includelevel + 1);
+                                               }
+                                       } else
                                                ast_log(LOG_WARNING, "Maximum Include level (%d) exceeded\n", includelevel);
                                } else
                                        ast_log(LOG_WARNING, "Directive '#include' needs an argument (filename) at line %d of %s\n", lineno, configfile);
                                /* Strip off leading and trailing "'s and <>'s */
-                       } else 
+                       }
+                       else 
                                ast_log(LOG_WARNING, "Unknown directive '%s' at line %d of %s\n", cur, lineno, configfile);
                } else {
                        /* Just a line (variable = value) */
                        if (!*_tmpc) {
                                ast_log(LOG_WARNING,
                                        "parse error: No category context for line %d of %s\n", lineno, configfile);
+                               ast_destroy(tmp);
+                               return -1;
                        }
                        c = strchr(cur, '=');
                        if (c) {
                                *c = 0;
                                c++;
                                /* Ignore > in => */
-                               if (*c== '>')
+                               if (*c== '>') {
+                                       object = 1;
                                        c++;
-                               v = malloc(sizeof(struct ast_variable));
+                               } else
+                                       object = 0;
+                               v = ast_new_variable(ast_strip(cur), ast_strip(c));
                                if (v) {
-                                       memset(v, 0, sizeof(struct ast_variable));
                                        v->next = NULL;
-                                       v->name = strdup(strip(cur));
-                                       v->value = strdup(strip(c));
                                        v->lineno = lineno;
-                                       if (*_last)  
+                                       v->object = object;
+                                       /* Put and reset comments */
+                                       v->blanklines = 0;
+                                       if (*_last)
                                                (*_last)->next = v;
                                        else
                                                (*_tmpc)->root = v;
@@ -262,17 +359,154 @@ static int cfg_process(struct ast_config *tmp, struct ast_category **_tmpc, stru
        return 0;
 }
 
-static struct ast_config *__ast_load(char *configfile, struct ast_config *tmp, struct ast_category **_tmpc, struct ast_variable **_last, int includelevel)
+int ast_save(char *configfile, struct ast_config *cfg, char *generator)
 {
+       FILE *f;
        char fn[256];
-       char buf[256];
+       char date[256]="";
+       time_t t;
+       struct ast_variable *var;
+       struct ast_category *cat;
+       int blanklines = 0;
+       if (configfile[0] == '/') {
+               strncpy(fn, configfile, sizeof(fn)-1);
+       } else {
+               snprintf(fn, sizeof(fn), "%s/%s", AST_CONFIG_DIR, configfile);
+       }
+       time(&t);
+       strncpy(date, ctime(&t), sizeof(date) - 1);
+       if ((f = fopen(fn, "w"))) {
+               if ((option_verbose > 1) && !option_debug)
+                       ast_verbose(  VERBOSE_PREFIX_2 "Saving '%s': ", fn);
+               fprintf(f, ";!\n");
+               fprintf(f, ";! Automatically generated configuration file\n");
+               fprintf(f, ";! Filename: %s (%s)\n", configfile, fn);
+               fprintf(f, ";! Generator: %s\n", generator);
+               fprintf(f, ";! Creation Date: %s", date);
+               fprintf(f, ";!\n");
+               cat = cfg->root;
+               while(cat) {
+                       /* Dump section with any appropriate comment */
+                       fprintf(f, "[%s]\n", cat->name);
+                       var = cat->root;
+                       while(var) {
+                               if (var->sameline) 
+                                       fprintf(f, "%s %s %s  ; %s\n", var->name, (var->object ? "=>" : "="), var->value, var->sameline->cmt);
+                               else    
+                                       fprintf(f, "%s %s %s\n", var->name, (var->object ? "=>" : "="), var->value);
+                               if (var->blanklines) {
+                                       blanklines = var->blanklines;
+                                       while (blanklines) {
+                                               fprintf(f, "\n");
+                                               blanklines--;
+                                       }
+                               }
+                                       
+                               var = var->next;
+                       }
+#if 0
+                       /* Put an empty line */
+                       fprintf(f, "\n");
+#endif
+                       cat = cat->next;
+               }
+       } else {
+               if (option_debug)
+                       printf("Unable to open for writing: %s\n", fn);
+               else if (option_verbose > 1)
+                       printf( "Unable to write (%s)", strerror(errno));
+               return -1;
+       }
+       fclose(f);
+       return 0;
+}
+
+
+struct ast_variable *ast_load_realtime(const char *family, ...)
+{
+       struct ast_config_reg *reg;
+       char db[256]="";
+       char table[256]="";
+       struct ast_variable *res=NULL;
+       va_list ap;
+       va_start(ap, family);
+       reg = get_ast_cust_config_keyword(family, db, sizeof(db), table, sizeof(table));
+       if (reg && reg->realtime_func) 
+               res = reg->realtime_func(db, table, ap);
+       va_end(ap);
+       return res;
+}
+
+struct ast_config *ast_load_realtime_multientry(const char *family, ...)
+{
+       struct ast_config_reg *reg;
+       char db[256]="";
+       char table[256]="";
+       struct ast_config *res=NULL;
+       va_list ap;
+       va_start(ap, family);
+       reg = get_ast_cust_config_keyword(family, db, sizeof(db), table, sizeof(table));
+       if (reg && reg->realtime_multi_func) 
+               res = reg->realtime_multi_func(db, table, ap);
+       va_end(ap);
+       return res;
+}
+
+int ast_update_realtime(const char *family, const char *keyfield, const char *lookup, ...)
+{
+       struct ast_config_reg *reg;
+       int res = -1;
+       char db[256]="";
+       char table[256]="";
+       va_list ap;
+       va_start(ap, lookup);
+       reg = get_ast_cust_config_keyword(family, db, sizeof(db), table, sizeof(table));
+       if (reg && reg->update_func) 
+               res = reg->update_func(db, table, keyfield, lookup, ap);
+       va_end(ap);
+       return res;
+}
+
+static struct ast_config *__ast_load(const char *configfile, struct ast_config *tmp, struct ast_category **_tmpc, struct ast_variable **_last, int includelevel)
+{
+       char fn[256];
+       char buf[8192];
+       char db[256];
+       char table[256];
        FILE *f;
        int lineno=0;
+       int master=0;
+       struct ast_config_reg *reg=NULL;
+       struct ast_config *(*load_func)(const char *database, const char *table, const char *, struct ast_config *,struct ast_category **,struct ast_variable **,int);
+
+       load_func=NULL;
+       if (strcmp(configfile,config_conf_file) && strcmp(configfile,"asterisk.conf") && ast_cust_config_list) {
+               if (global_load_func) {
+                       load_func = global_load_func;
+               } else {
+                       reg = get_ast_cust_config_keyword(configfile, db, sizeof(db), table, sizeof(table));
+                       if (reg && reg->static_func) {
+                               load_func = reg->static_func;
+                       } else {
+                               reg = get_ast_cust_config_keyword(configfile, db, sizeof(db), table, sizeof(table));
+                               if (reg && reg->static_func)
+                                       global_load_func = load_func = reg->static_func;
+                       }
+               }
+
+               if (load_func) {
+                       ast_log(LOG_NOTICE,"Loading Config %s via %s engine\n",configfile,reg && reg->name ? reg->name : "global");
+                       tmp = load_func(db, table, configfile,tmp, _tmpc, _last, includelevel);
+           
+                       if (tmp)
+                               return tmp;
+               }
+       }
 
        if (configfile[0] == '/') {
                strncpy(fn, configfile, sizeof(fn)-1);
        } else {
-               snprintf(fn, sizeof(fn), "%s/%s", AST_CONFIG_DIR, configfile);
+               snprintf(fn, sizeof(fn), "%s/%s", (char *)ast_config_AST_CONFIG_DIR, configfile);
        }
        if ((option_verbose > 1) && !option_debug) {
                ast_verbose(  VERBOSE_PREFIX_2 "Parsing '%s': ", fn);
@@ -287,6 +521,8 @@ static struct ast_config *__ast_load(char *configfile, struct ast_config *tmp, s
                        tmp = malloc(sizeof(struct ast_config));
                        if (tmp)
                                memset(tmp, 0, sizeof(struct ast_config));
+
+                       master = 1;
                }
                if (!tmp) {
                        ast_log(LOG_WARNING, "Out of memory\n");
@@ -294,9 +530,8 @@ static struct ast_config *__ast_load(char *configfile, struct ast_config *tmp, s
                        return NULL;
                }
                while(!feof(f)) {
-                       fgets(buf, sizeof(buf), f);
                        lineno++;
-                       if (!feof(f)) {
+                       if (fgets(buf, sizeof(buf), f)) {
                                if (cfg_process(tmp, _tmpc, _last, buf, lineno, configfile, includelevel)) {
                                        fclose(f);
                                        return NULL;
@@ -308,18 +543,72 @@ static struct ast_config *__ast_load(char *configfile, struct ast_config *tmp, s
                if (option_debug)
                        ast_log(LOG_DEBUG, "No file to parse: %s\n", fn);
                else if (option_verbose > 1)
-                       ast_verbose( "Not found (%s)", strerror(errno));
+                       ast_verbose( "Not found (%s)\n", strerror(errno));
        }
        return tmp;
 }
 
+int ast_config_register(struct ast_config_reg *new) 
+{
+       struct ast_config_reg *ptr;
+       ast_mutex_lock(&ast_cust_config_lock);
+       if (!ast_cust_config_list) {
+               ast_cust_config_list = new;
+       } else {
+               for(ptr=ast_cust_config_list;ptr->next;ptr=ptr->next);
+                       ptr->next = new;
+       }
+       ast_mutex_unlock(&ast_cust_config_lock);
+       ast_log(LOG_NOTICE,"Registered Config Engine %s\n",new->name);
+       return 1;
+}
+
+int ast_config_deregister(struct ast_config_reg *del) 
+{
+       struct ast_config_reg *ptr=NULL,*last=NULL;
+       ast_mutex_lock(&ast_cust_config_lock);
+       for (ptr=ast_cust_config_list;ptr;ptr=ptr->next) {
+               if (ptr == del) {
+                       if (last && ptr->next) {
+                               last->next = ptr->next;
+                       } else if (last && ! ptr->next) {
+                               last->next = NULL;
+                       } else if (!last && ptr->next) {
+                               ast_cust_config_list = ptr->next;
+                       } else if (!last && !ptr->next) {
+                               ast_cust_config_list = NULL;
+                       }
+               }
+               last = ptr;
+       }
+       ast_mutex_unlock(&ast_cust_config_lock);
+       return 0;
+}
+
+int ast_cust_config_active(void) {
+       return (ast_cust_config >0) ? 1 : 0;
+}
+
 struct ast_config *ast_load(char *configfile)
 {
        struct ast_category *tmpc=NULL;
        struct ast_variable *last = NULL;
+
        return __ast_load(configfile, NULL, &tmpc, &last, 0);
 }
 
+void ast_category_append(struct ast_config *config, struct ast_category *cat)
+{
+       struct ast_category *prev = NULL;
+       cat->next = NULL;
+       if (config->root) {
+               prev = config->root;
+               while(prev->next) prev = prev->next;
+               prev->next = cat;
+       } else
+               config->root = cat;
+}
+
 char *ast_category_browse(struct ast_config *config, char *prev)
 {      
        struct ast_category *cat;
@@ -351,3 +640,155 @@ char *ast_category_browse(struct ast_config *config, char *prev)
        }
        return NULL;
 }
+
+
+struct ast_config *ast_new_config(void) 
+{
+       struct ast_config *config;
+       config = malloc(sizeof(struct ast_config));
+       memset(config,0,sizeof(struct ast_config));
+       return config;
+}
+
+
+
+struct ast_category *ast_new_category(char *name) 
+{
+       struct ast_category *category;
+       category = malloc(sizeof(struct ast_category));
+       if (category) {
+               memset(category,0,sizeof(struct ast_category));
+               strncpy(category->name,name,sizeof(category->name) - 1);
+       }
+       return category;
+}
+
+
+struct ast_variable *ast_new_variable(char *name, char *value) 
+{
+       struct ast_variable *variable;
+       int length = strlen(name) + strlen(value) + 2 + sizeof(struct ast_variable);
+       variable = malloc(length);
+       if (variable) {
+               memset(variable, 0, length);
+               variable->name = variable->stuff;
+               variable->value = variable->stuff + strlen(name) + 1;           
+               variable->object=0;
+               strcpy(variable->name,name);
+               strcpy(variable->value,value);
+       }
+       return variable;
+}
+
+int ast_cust_config_register(struct ast_config_reg *new) 
+{
+       ast_config_register(new);
+       read_ast_cust_config();
+       return 1;
+}
+int ast_cust_config_deregister(struct ast_config_reg *new) 
+{
+       ast_config_deregister(new);
+       read_ast_cust_config();
+       return 1;
+}
+
+static void clear_cust_keywords(void) 
+{
+       struct ast_config_map *map, *prev;
+       ast_mutex_lock(&ast_cust_config_lock);
+       map = maps;
+       while(map) {
+               prev = map;
+               map = map->next;
+               free(prev);
+       }
+       maps = NULL;
+       ast_mutex_unlock(&ast_cust_config_lock);
+}
+
+static int config_command(int fd, int argc, char **argv) 
+{
+       struct ast_config_reg *key;
+       struct ast_config_map *map;
+       
+       ast_cli(fd,"\n\n");
+       ast_mutex_lock(&ast_cust_config_lock);
+       for (key=get_config_registrations();key;key=key->next) {
+               ast_cli(fd,"\nConfig Engine: %s\n",key->name);
+               map = maps;
+               while(map) {
+                       if (!strcasecmp(map->driver, key->name))
+                               ast_cli(fd,"===> %s (db=%s, table=%s)\n",map->name, map->database, map->table ? map->table : map->name);
+                       map = map->next;
+               }
+       }
+       ast_mutex_unlock(&ast_cust_config_lock);
+       ast_cli(fd,"\n\n");
+       
+       return 0;
+}
+
+static struct ast_cli_entry config_command_struct = {
+  { "show","config","handles", NULL }, config_command,
+  "Show Config Handles", NULL };
+
+int register_config_cli() 
+{
+       return ast_cli_register(&config_command_struct);
+}
+
+int read_ast_cust_config(void) 
+{
+       char *cfg = config_conf_file;
+       struct ast_config *config;
+       struct ast_variable *v;
+       struct ast_config_map *map;
+       int length;
+       char *driver, *table, *database, *stringp;
+
+       clear_cust_keywords();
+       config = ast_load(cfg);
+       if (config) {
+               for (v = ast_variable_browse(config,"settings");v;v=v->next) {
+                       stringp = v->value;
+                       driver = strsep(&stringp, ",");
+                       database = strsep(&stringp, ",");
+                       table = strsep(&stringp, ",");
+                       
+                       if (!strcmp(v->name,config_conf_file) || !strcmp(v->name,"asterisk.conf")) {
+                               ast_log(LOG_WARNING, "Cannot bind asterisk.conf or extconfig.conf!\n");
+                       } else if (driver && database) {
+                               length = sizeof(struct ast_config_map);
+                               length += strlen(v->name) + 1;
+                               length += strlen(driver) + 1;
+                               length += strlen(database) + 1;
+                               if (table)
+                                       length += strlen(table) + 1;
+                               map = malloc(length);
+                               if (map) {
+                                       memset(map, 0, length);
+                                       map->name = map->stuff;
+                                       strcpy(map->name, v->name);
+                                       map->driver = map->name + strlen(map->name) + 1;
+                                       strcpy(map->driver, driver);
+                                       map->database = map->driver + strlen(map->driver) + 1;
+                                       strcpy(map->database, database);
+                                       if (table) {
+                                               map->table = map->database + strlen(map->database) + 1;
+                                               strcpy(map->table, table);
+                                       } else
+                                               map->table = NULL;
+                                       map->next = maps;
+                                       if (option_verbose > 1)
+                                               ast_verbose(VERBOSE_PREFIX_2 "Binding %s to %s/%s/%s\n",map->name,map->driver, map->database, map->table ? map->table : map->name);
+                                       maps = map;
+                               }
+                       }
+               }
+               
+               ast_destroy(config);
+       }
+
+       return 0;
+}