Sat Nov 1 06:29:02 2008

Asterisk developer's documentation

---

config.h File Reference

Configuration File Parser. More...

#include <stdarg.h>

Include dependency graph for config.h:

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Go to the source code of this file.

Data Structures
struct	ast_config_engine
struct	ast_variable
Typedefs
typedef ast_config *	config_load_func (const char *database, const char *table, const char *configfile, struct ast_config *config, int withcomments)
typedef ast_config *	realtime_multi_get (const char *database, const char *table, va_list ap)
typedef int	realtime_update (const char *database, const char *table, const char *keyfield, const char *entity, va_list ap)
typedef ast_variable *	realtime_var_get (const char *database, const char *table, va_list ap)
Functions
void	ast_category_append (struct ast_config *config, struct ast_category *cat)
char *	ast_category_browse (struct ast_config *config, const char *prev)
	Goes through categories.
int	ast_category_delete (struct ast_config *cfg, char *category)
void	ast_category_destroy (struct ast_category *cat)
ast_variable *	ast_category_detach_variables (struct ast_category *cat)
int	ast_category_exist (const struct ast_config *config, const char *category_name)
	Check for category duplicates.
ast_category *	ast_category_get (const struct ast_config *config, const char *category_name)
	Retrieve a category if it exists.
ast_category *	ast_category_new (const char *name)
void	ast_category_rename (struct ast_category *cat, const char *name)
ast_variable *	ast_category_root (struct ast_config *config, char *cat)
	returns the root ast_variable of a config
int	ast_check_realtime (const char *family)
	Check if realtime engine is configured for family returns 1 if family is configured in realtime and engine exists.
void	ast_config_destroy (struct ast_config *config)
	Destroys a config.
int	ast_config_engine_deregister (struct ast_config_engine *del)
	Deegister config engine.
int	ast_config_engine_register (struct ast_config_engine *newconfig)
	Register config engine.
ast_category *	ast_config_get_current_category (const struct ast_config *cfg)
ast_config *	ast_config_internal_load (const char *configfile, struct ast_config *cfg, int withcomments)
ast_config *	ast_config_load (const char *filename)
	Load a config file.
ast_config *	ast_config_load_with_comments (const char *filename)
ast_config *	ast_config_new (void)
const char *	ast_config_option (struct ast_config *cfg, const char *cat, const char *var)
void	ast_config_set_current_category (struct ast_config *cfg, const struct ast_category *cat)
ast_variable *	ast_load_realtime (const char *family,...)
	Retrieve realtime configuration.
ast_config *	ast_load_realtime_multientry (const char *family,...)
	Retrieve realtime configuration.
int	ast_update_realtime (const char *family, const char *keyfield, const char *lookup,...)
	Update realtime configuration.
void	ast_variable_append (struct ast_category *category, struct ast_variable *variable)
ast_variable *	ast_variable_browse (const struct ast_config *config, const char *category)
	Goes through variables Somewhat similar in intent as the ast_category_browse. List variables of config file category.
int	ast_variable_delete (struct ast_category *category, char *variable, char *match)
ast_variable *	ast_variable_new (const char *name, const char *value)
const char *	ast_variable_retrieve (const struct ast_config *config, const char *category, const char *variable)
	Gets a variable.
int	ast_variable_update (struct ast_category *category, const char *variable, const char *value, const char *match, unsigned int object)
void	ast_variables_destroy (struct ast_variable *var)
	Free variable list.
int	config_text_file_save (const char *filename, const struct ast_config *cfg, const char *generator)
int	read_config_maps (void)
int	register_config_cli (void)

---

Detailed Description

Configuration File Parser.

Definition in file config.h.

---

Typedef Documentation

typedef struct ast_config* config_load_func(const char *database, const char *table, const char *configfile, struct ast_config *config, int withcomments)

Definition at line 48 of file config.h.

typedef struct ast_config* realtime_multi_get(const char *database, const char *table, va_list ap)

Definition at line 50 of file config.h.

typedef int realtime_update(const char *database, const char *table, const char *keyfield, const char *entity, va_list ap)

Definition at line 51 of file config.h.

typedef struct ast_variable* realtime_var_get(const char *database, const char *table, va_list ap)

Definition at line 49 of file config.h.

---

Function Documentation

void ast_category_append	(	struct ast_config *	config,
		struct ast_category *	cat
	)

Definition at line 339 of file config.c.

References config, and ast_category::include_level.

Referenced by config_odbc(), config_pgsql(), handle_updates(), process_text_line(), realtime_directory(), realtime_multi_odbc(), and realtime_multi_pgsql().

{
   if (config->last)
      config->last->next = category;
   else
      config->root = category;
   category->include_level = config->include_level;
   config->last = category;
   config->current = category;
}

char* ast_category_browse	(	struct ast_config *	config,
		const char *	prev
	)

Goes through categories.

Parameters:

	config	Which config structure you wish to "browse"
	prev	A pointer to a previous category. This funtion is kind of non-intuitive in it's use. To begin, one passes NULL as the second arguement. It will return a pointer to the string of the first category in the file. From here on after, one must then pass the previous usage's return value as the second pointer, and it will return a pointer to the category name afterwards.

Returns a category on success, or NULL on failure/no-more-categories

Definition at line 398 of file config.c.

References config, ast_category::name, and next_available_category().

Referenced by __queues_show(), action_getconfig(), aji_load_config(), authenticate(), complete_sipnotify(), do_directory(), gtalk_load_config(), iax_provision_reload(), ind_load_module(), init_manager(), load_config(), load_module(), load_moh_classes(), load_odbc_config(), loadconfigurationfile(), misdn_cfg_init(), odbc_load_module(), osp_load(), pbx_load_config(), pbx_load_users(), read_agent_config(), realtime_directory(), realtime_switch_common(), reload(), reload_config(), reload_followme(), reload_queues(), rpt_master(), set_config(), setup_dahdi(), sla_load_config(), update_realtime_members(), and vm_change_password().

{  
   struct ast_category *cat = NULL;

   if (prev && config->last_browse && (config->last_browse->name == prev))
      cat = config->last_browse->next;
   else if (!prev && config->root)
      cat = config->root;
   else if (prev) {
      for (cat = config->root; cat; cat = cat->next) {
         if (cat->name == prev) {
            cat = cat->next;
            break;
         }
      }
      if (!cat) {
         for (cat = config->root; cat; cat = cat->next) {
            if (!strcasecmp(cat->name, prev)) {
               cat = cat->next;
               break;
            }
         }
      }
   }
   
   if (cat)
      cat = next_available_category(cat);

   config->last_browse = cat;
   return (cat) ? cat->name : NULL;
}

int ast_category_delete	(	struct ast_config *	cfg,
		char *	category
	)

Definition at line 553 of file config.c.

References ast_category_destroy(), ast_config::last, and ast_config::root.

Referenced by handle_updates().

{
   struct ast_category *prev=NULL, *cat;
   cat = cfg->root;
   while(cat) {
      if (cat->name == category) {
         if (prev) {
            prev->next = cat->next;
            if (cat == cfg->last)
               cfg->last = prev;
         } else {
            cfg->root = cat->next;
            if (cat == cfg->last)
               cfg->last = NULL;
         }
         ast_category_destroy(cat);
         return 0;
      }
      prev = cat;
      cat = cat->next;
   }

   prev = NULL;
   cat = cfg->root;
   while(cat) {
      if (!strcasecmp(cat->name, category)) {
         if (prev) {
            prev->next = cat->next;
            if (cat == cfg->last)
               cfg->last = prev;
         } else {
            cfg->root = cat->next;
            if (cat == cfg->last)
               cfg->last = NULL;
         }
         ast_category_destroy(cat);
         return 0;
      }
      prev = cat;
      cat = cat->next;
   }
   return -1;
}

void ast_category_destroy

(

struct ast_category *

cat

)

Definition at line 375 of file config.c.

References ast_destroy_comments(), ast_destroy_template_list(), ast_variables_destroy(), and free.

Referenced by ast_category_delete(), ast_config_destroy(), process_text_line(), and realtime_multi_odbc().

{
   ast_variables_destroy(cat->root);
   ast_destroy_comments(cat);
   ast_destroy_template_list(cat);
   free(cat);
}

struct ast_variable* ast_category_detach_variables

(

struct ast_category *

cat

)

Definition at line 430 of file config.c.

Referenced by realtime_switch_common().

{
   struct ast_variable *v;

   v = cat->root;
   cat->root = NULL;
   cat->last = NULL;

   return v;
}

int ast_category_exist	(	const struct ast_config *	config,
		const char *	category_name
	)

Check for category duplicates.

Parameters:

	config	which config to use
	category_name	name of the category you're looking for This will search through the categories within a given config file for a match.

Return non-zero if found

Definition at line 334 of file config.c.

References ast_category_get(), and config.

{
   return !!ast_category_get(config, category_name);
}

struct ast_category* ast_category_get	(	const struct ast_config *	config,
		const char *	category_name
	)

Retrieve a category if it exists.

Parameters:

	config	which config to use
	category_name	name of the category you're looking for This will search through the categories within a given config file for a match.

Returns pointer to category if found, NULL if not.

Definition at line 329 of file config.c.

References category_get(), and config.

Referenced by ast_category_exist(), ast_category_root(), ast_variable_browse(), handle_updates(), realtime_directory(), realtime_switch_common(), vm_change_password(), and vm_forwardoptions().

{
   return category_get(config, category_name, 0);
}

struct ast_category* ast_category_new

(

const char *

name

)

Definition at line 302 of file config.c.

References ast_calloc.

Referenced by config_odbc(), config_pgsql(), handle_updates(), process_text_line(), realtime_directory(), realtime_multi_odbc(), and realtime_multi_pgsql().

{
   struct ast_category *category;

   if ((category = ast_calloc(1, sizeof(*category))))
      ast_copy_string(category->name, name, sizeof(category->name));
   return category;
}

void ast_category_rename	(	struct ast_category *	cat,
		const char *	name
	)

Definition at line 441 of file config.c.

References ast_category::name.

Referenced by handle_updates(), realtime_multi_odbc(), and realtime_multi_pgsql().

{
   ast_copy_string(cat->name, name, sizeof(cat->name));
}

struct ast_variable* ast_category_root	(	struct ast_config *	config,
		char *	cat
	)

returns the root ast_variable of a config

Parameters:

	config	pointer to an ast_config data structure
	cat	name of the category for which you want the root

Returns the category specified

Definition at line 390 of file config.c.

References ast_category_get(), and config.

{
   struct ast_category *category = ast_category_get(config, cat);
   if (category)
      return category->root;
   return NULL;
}

int ast_check_realtime

(

const char *

family

)

Check if realtime engine is configured for family returns 1 if family is configured in realtime and engine exists.

Parameters:

family

which family/config to be checked

Definition at line 1433 of file config.c.

References find_engine().

Referenced by __queues_show(), _sip_show_peer(), _sip_show_peers(), and sip_show_settings().

{
   struct ast_config_engine *eng;

   eng = find_engine(family, NULL, 0, NULL, 0);
   if (eng)
      return 1;
   return 0;

}

void ast_config_destroy

(

struct ast_config *

config

)

Destroys a config.

Parameters:

config

pointer to config data structure Free memory associated with a given config

Definition at line 597 of file config.c.

References ast_category_destroy(), free, and ast_config::root.

Referenced by __ast_http_load(), __queues_show(), action_getconfig(), action_updateconfig(), adsi_load(), advanced_options(), aji_load_config(), ast_config_load(), ast_config_load_with_comments(), ast_enum_init(), ast_rtp_reload(), ast_udptl_reload(), authenticate(), conf_exec(), directory_exec(), do_reload(), festival_exec(), find_conf(), handle_save_dialplan(), iax_provision_reload(), ind_load_module(), init_logger_chain(), load_config(), load_config_meetme(), load_module(), load_moh_classes(), load_realtime_queue(), load_rpt_vars(), loadconfigurationfile(), my_load_module(), node_lookup(), odbc_load_module(), osp_load(), parse_config(), pbx_load_users(), play_message(), privacy_exec(), read_agent_config(), read_config_maps(), realtime_directory(), realtime_switch_common(), reload(), reload_config(), reload_followme(), rpt_master(), set_config(), setup_dahdi(), sla_load_config(), tds_load_module(), unload_module(), update_realtime_members(), and vm_forwardoptions().

{
   struct ast_category *cat, *catn;

   if (!cfg)
      return;

   cat = cfg->root;
   while(cat) {
      catn = cat;
      cat = cat->next;
      ast_category_destroy(catn);
   }
   free(cfg);
}

int ast_config_engine_deregister

(

struct ast_config_engine *

del

)

Deegister config engine.

Definition at line 1281 of file config.c.

References ast_mutex_lock(), ast_mutex_unlock(), config_engine_list, last, and ast_config_engine::next.

Referenced by unload_module().

{
   struct ast_config_engine *ptr, *last=NULL;

   ast_mutex_lock(&config_lock);

   for (ptr = config_engine_list; ptr; ptr=ptr->next) {
      if (ptr == del) {
         if (last)
            last->next = ptr->next;
         else
            config_engine_list = ptr->next;
         break;
      }
      last = ptr;
   }

   ast_mutex_unlock(&config_lock);

   return 0;
}

int ast_config_engine_register

(

struct ast_config_engine *

newconfig

)

Register config engine.

Definition at line 1262 of file config.c.

References ast_log(), ast_mutex_lock(), ast_mutex_unlock(), config_engine_list, LOG_NOTICE, ast_config_engine::name, and ast_config_engine::next.

Referenced by load_module().

{
   struct ast_config_engine *ptr;

   ast_mutex_lock(&config_lock);

   if (!config_engine_list) {
      config_engine_list = new;
   } else {
      for (ptr = config_engine_list; ptr->next; ptr=ptr->next);
      ptr->next = new;
   }

   ast_mutex_unlock(&config_lock);
   ast_log(LOG_NOTICE,"Registered Config Engine %s\n", new->name);

   return 1;
}

struct ast_category* ast_config_get_current_category

(

const struct ast_config *

cfg

)

Definition at line 613 of file config.c.

References ast_config::current.

Referenced by config_odbc(), and config_text_file_load().

{
   return cfg->current;
}

struct ast_config* ast_config_internal_load	(	const char *	configfile,
		struct ast_config *	cfg,
		int	withcomments
	)

Definition at line 1343 of file config.c.

References ast_log(), config_engine_list, db, find_engine(), ast_config::include_level, ast_config_engine::load_func, LOG_WARNING, ast_config::max_include_level, table, and text_file_engine.

Referenced by ast_config_load(), ast_config_load_with_comments(), config_odbc(), config_pgsql(), process_text_line(), and read_config_maps().

{
   char db[256];
   char table[256];
   struct ast_config_engine *loader = &text_file_engine;
   struct ast_config *result; 

   /* The config file itself bumps include_level by 1 */
   if (cfg->max_include_level > 0 && cfg->include_level == cfg->max_include_level + 1) {
      ast_log(LOG_WARNING, "Maximum Include level (%d) exceeded\n", cfg->max_include_level);
      return NULL;
   }

   cfg->include_level++;

   if (strcmp(filename, extconfig_conf) && strcmp(filename, "asterisk.conf") && config_engine_list) {
      struct ast_config_engine *eng;

      eng = find_engine(filename, db, sizeof(db), table, sizeof(table));


      if (eng && eng->load_func) {
         loader = eng;
      } else {
         eng = find_engine("global", db, sizeof(db), table, sizeof(table));
         if (eng && eng->load_func)
            loader = eng;
      }
   }

   result = loader->load_func(db, table, filename, cfg, withcomments);

   if (result)
      result->include_level--;
   else
      cfg->include_level--;

   return result;
}

struct ast_config* ast_config_load

(

const char *

filename

)

Load a config file.

Parameters:

filename

path of file to open. If no preceding '/' character, path is considered relative to AST_CONFIG_DIR Create a config structure from a given configuration file.

Returns NULL on error, or an ast_config data structure on success

Definition at line 1383 of file config.c.

References ast_config_destroy(), ast_config_internal_load(), and ast_config_new().

Referenced by __ast_http_load(), __say_init(), adsi_load(), advanced_options(), aji_load_config(), ast_enum_init(), ast_readconfig(), ast_rtp_reload(), ast_udptl_reload(), authenticate(), conf_exec(), directory_exec(), do_reload(), festival_exec(), find_conf(), gtalk_load_config(), handle_save_dialplan(), iax_provision_reload(), ind_load_module(), init_logger_chain(), init_manager(), load_config(), load_config_meetme(), load_module(), load_modules(), load_moh_classes(), load_odbc_config(), load_rpt_vars(), loadconfigurationfile(), my_load_module(), node_lookup(), odbc_load_module(), osp_load(), parse_config(), pbx_load_config(), pbx_load_users(), play_message(), privacy_exec(), read_agent_config(), realtime_directory(), reload(), reload_config(), reload_followme(), reload_queues(), rpt_master(), set_config(), setup_dahdi(), sla_load_config(), smdi_load(), tds_load_module(), and vm_forwardoptions().

{
   struct ast_config *cfg;
   struct ast_config *result;

   cfg = ast_config_new();
   if (!cfg)
      return NULL;

   result = ast_config_internal_load(filename, cfg, 0);
   if (!result)
      ast_config_destroy(cfg);

   return result;
}

struct ast_config* ast_config_load_with_comments

(

const char *

filename

)

Definition at line 1399 of file config.c.

References ast_config_destroy(), ast_config_internal_load(), and ast_config_new().

Referenced by action_getconfig(), action_updateconfig(), and vm_change_password().

{
   struct ast_config *cfg;
   struct ast_config *result;

   cfg = ast_config_new();
   if (!cfg)
      return NULL;

   result = ast_config_internal_load(filename, cfg, 1);
   if (!result)
      ast_config_destroy(cfg);

   return result;
}

struct ast_config* ast_config_new

(

void

)

Definition at line 457 of file config.c.

References ast_calloc, config, and MAX_INCLUDE_LEVEL.

Referenced by ast_config_load(), ast_config_load_with_comments(), read_config_maps(), realtime_multi_odbc(), and realtime_multi_pgsql().

{
   struct ast_config *config;

   if ((config = ast_calloc(1, sizeof(*config))))
      config->max_include_level = MAX_INCLUDE_LEVEL;
   return config;
}

const char* ast_config_option	(	struct ast_config *	cfg,
		const char *	cat,
		const char *	var
	)

Definition at line 240 of file config.c.

References ast_variable_retrieve().

Referenced by do_directory(), load_config(), and pbx_load_users().

{
   const char *tmp;
   tmp = ast_variable_retrieve(cfg, cat, var);
   if (!tmp)
      tmp = ast_variable_retrieve(cfg, "general", var);
   return tmp;
}

void ast_config_set_current_category	(	struct ast_config *	cfg,
		const struct ast_category *	cat
	)

Definition at line 618 of file config.c.

References ast_config::current.

{
   /* cast below is just to silence compiler warning about dropping "const" */
   cfg->current = (struct ast_category *) cat;
}

struct ast_variable* ast_load_realtime	(	const char *	family,
			...
	)

Retrieve realtime configuration.

Parameters:

family

which family/config to lookup This will use builtin configuration backends to look up a particular entity in realtime and return a variable list of its parameters. Note that unlike the variables in ast_config, the resulting list of variables MUST be freed with ast_variables_destroy() as there is no container.

Definition at line 1415 of file config.c.

References db, find_engine(), ast_config_engine::realtime_func, and table.

Referenced by cli_realtime_load(), find_conf_realtime(), find_user_realtime(), function_realtime_read(), load_realtime_queue(), queue_function_queuewaitingcount(), realtime_alias(), realtime_exec(), realtime_peer(), realtime_switch_common(), realtime_user(), and update_realtime_member_field().

{
   struct ast_config_engine *eng;
   char db[256]="";
   char table[256]="";
   struct ast_variable *res=NULL;
   va_list ap;

   va_start(ap, family);
   eng = find_engine(family, db, sizeof(db), table, sizeof(table));
   if (eng && eng->realtime_func) 
      res = eng->realtime_func(db, table, ap);
   va_end(ap);

   return res;
}

struct ast_config* ast_load_realtime_multientry	(	const char *	family,
			...
	)

Retrieve realtime configuration.

Parameters:

family

which family/config to lookup This will use builtin configuration backends to look up a particular entity in realtime and return a variable list of its parameters. Unlike the ast_load_realtime, this function can return more than one entry and is thus stored inside a taditional ast_config structure rather than just returning a linked list of variables.

Definition at line 1444 of file config.c.

References db, find_engine(), ast_config_engine::realtime_multi_func, and table.

Referenced by __queues_show(), load_realtime_queue(), realtime_directory(), realtime_switch_common(), and update_realtime_members().

{
   struct ast_config_engine *eng;
   char db[256]="";
   char table[256]="";
   struct ast_config *res=NULL;
   va_list ap;

   va_start(ap, family);
   eng = find_engine(family, db, sizeof(db), table, sizeof(table));
   if (eng && eng->realtime_multi_func) 
      res = eng->realtime_multi_func(db, table, ap);
   va_end(ap);

   return res;
}

int ast_update_realtime	(	const char *	family,
		const char *	keyfield,
		const char *	lookup,
			...
	)

Update realtime configuration.

Parameters:

	family	which family/config to be updated
	keyfield	which field to use as the key
	lookup	which value to look for in the key field to match the entry. This function is used to update a parameter in realtime configuration space.

Definition at line 1461 of file config.c.

References db, find_engine(), table, and ast_config_engine::update_func.

Referenced by change_password_realtime(), cli_realtime_update(), conf_run(), destroy_association(), function_realtime_write(), realtime_update_exec(), realtime_update_peer(), and update_realtime_member_field().

{
   struct ast_config_engine *eng;
   int res = -1;
   char db[256]="";
   char table[256]="";
   va_list ap;

   va_start(ap, lookup);
   eng = find_engine(family, db, sizeof(db), table, sizeof(table));
   if (eng && eng->update_func) 
      res = eng->update_func(db, table, keyfield, lookup, ap);
   va_end(ap);

   return res;
}

void ast_variable_append	(	struct ast_category *	category,
		struct ast_variable *	variable
	)

Definition at line 204 of file config.c.

Referenced by config_odbc(), config_pgsql(), handle_updates(), inherit_category(), move_variables(), process_text_line(), realtime_directory(), realtime_multi_odbc(), realtime_multi_pgsql(), and vm_change_password().

{
   if (!variable)
      return;
   if (category->last)
      category->last->next = variable;
   else
      category->root = variable;
   category->last = variable;
   while (category->last->next)
      category->last = category->last->next;
}

struct ast_variable* ast_variable_browse	(	const struct ast_config *	config,
		const char *	category
	)

Goes through variables Somewhat similar in intent as the ast_category_browse. List variables of config file category.

Returns ast_variable list on success, or NULL on failure

Definition at line 228 of file config.c.

References ast_category_get(), and config.

Referenced by __ast_http_load(), action_getconfig(), adsi_load(), aji_load_config(), ast_enum_init(), ast_readconfig(), ast_variable_retrieve(), authenticate(), check_tx_freq(), collect_function_digits(), conf_exec(), do_directory(), do_say(), do_scheduler(), find_conf(), gtalk_load_config(), handle_save_dialplan(), iax_template_parse(), ind_load_module(), init_logger_chain(), init_manager(), load_config(), load_module(), load_modules(), load_moh_classes(), load_odbc_config(), load_rpt_vars(), loadconfigurationfile(), misdn_cfg_init(), node_lookup(), odbc_load_module(), osp_create_provider(), parse_config(), pbx_load_config(), process_my_load_module(), read_agent_config(), read_config_maps(), reload(), reload_config(), reload_followme(), reload_queues(), set_config(), setup_dahdi(), sip_notify(), sla_build_station(), sla_build_trunk(), smdi_load(), store_config(), and tds_load_module().

{
   struct ast_category *cat = NULL;

   if (category && config->last_browse && (config->last_browse->name == category))
      cat = config->last_browse;
   else
      cat = ast_category_get(config, category);

   return (cat) ? cat->root : NULL;
}

int ast_variable_delete	(	struct ast_category *	category,
		char *	variable,
		char *	match
	)

Definition at line 466 of file config.c.

References ast_strlen_zero(), ast_variables_destroy(), ast_variable::name, ast_variable::next, and ast_variable::value.

Referenced by handle_updates().

{
   struct ast_variable *cur, *prev=NULL, *curn;
   int res = -1;
   cur = category->root;
   while (cur) {
      if (cur->name == variable) {
         if (prev) {
            prev->next = cur->next;
            if (cur == category->last)
               category->last = prev;
         } else {
            category->root = cur->next;
            if (cur == category->last)
               category->last = NULL;
         }
         cur->next = NULL;
         ast_variables_destroy(cur);
         return 0;
      }
      prev = cur;
      cur = cur->next;
   }

   prev = NULL;
   cur = category->root;
   while (cur) {
      curn = cur->next;
      if (!strcasecmp(cur->name, variable) && (ast_strlen_zero(match) || !strcasecmp(cur->value, match))) {
         if (prev) {
            prev->next = cur->next;
            if (cur == category->last)
               category->last = prev;
         } else {
            category->root = cur->next;
            if (cur == category->last)
               category->last = NULL;
         }
         cur->next = NULL;
         ast_variables_destroy(cur);
         res = 0;