config.c

{
	struct cache_file_mtime *cfmtime;

	switch (cmd) {
	case CLI_INIT:
		e->command = "config list";
		e->usage =
			"Usage: config list\n"
			"   Show all modules that have loaded a configuration file\n";
		return NULL;
	case CLI_GENERATE:
		return NULL;
	}

	AST_LIST_LOCK(&cfmtime_head);
	AST_LIST_TRAVERSE(&cfmtime_head, cfmtime, list) {
		ast_cli(a->fd, "%-20.20s %-50s\n", S_OR(cfmtime->who_asked, "core"), cfmtime->filename);
	}
	AST_LIST_UNLOCK(&cfmtime_head);

	return CLI_SUCCESS;
}

static struct ast_cli_entry cli_config[] = {
	AST_CLI_DEFINE(handle_cli_core_show_config_mappings, "Display config mappings (file names to config engines)"),
	AST_CLI_DEFINE(handle_cli_config_reload, "Force a reload on modules using a particular configuration file"),
	AST_CLI_DEFINE(handle_cli_config_list, "Show all files that have loaded a configuration file"),
};

static void config_shutdown(void)
{
	struct cache_file_mtime *cfmtime;

	AST_LIST_LOCK(&cfmtime_head);
	while ((cfmtime = AST_LIST_REMOVE_HEAD(&cfmtime_head, list))) {
		config_cache_destroy_entry(cfmtime);
	}
	AST_LIST_UNLOCK(&cfmtime_head);

	ast_cli_unregister_multiple(cli_config, ARRAY_LEN(cli_config));

	clear_config_maps();

	ao2_cleanup(cfg_hooks);
	cfg_hooks = NULL;
}

int register_config_cli(void)
{
	ast_cli_register_multiple(cli_config, ARRAY_LEN(cli_config));
	ast_register_cleanup(config_shutdown);
	return 0;
}

struct cfg_hook {
	const char *name;
	const char *filename;
	const char *module;
	config_hook_cb hook_cb;
};

static void hook_destroy(void *obj)
{
	struct cfg_hook *hook = obj;
	ast_free((void *) hook->name);
	ast_free((void *) hook->filename);
	ast_free((void *) hook->module);
}

static int hook_cmp(void *obj, void *arg, int flags)
{
	struct cfg_hook *hook1 = obj;
	struct cfg_hook *hook2 = arg;

	return !(strcasecmp(hook1->name, hook2->name)) ? CMP_MATCH | CMP_STOP : 0;
}

static int hook_hash(const void *obj, const int flags)
{
	const struct cfg_hook *hook = obj;

	return ast_str_hash(hook->name);
}

void ast_config_hook_unregister(const char *name)
{
	struct cfg_hook tmp;

	tmp.name = ast_strdupa(name);

	ao2_find(cfg_hooks, &tmp, OBJ_POINTER | OBJ_UNLINK | OBJ_NODATA);
}

static void config_hook_exec(const char *filename, const char *module, const struct ast_config *cfg)
{
	struct ao2_iterator it;
	struct cfg_hook *hook;
	if (!(cfg_hooks)) {
		return;
	}
	it = ao2_iterator_init(cfg_hooks, 0);
	while ((hook = ao2_iterator_next(&it))) {
		if (!strcasecmp(hook->filename, filename) &&
				!strcasecmp(hook->module, module)) {
			struct ast_config *copy = ast_config_copy(cfg);
			hook->hook_cb(copy);
		}
		ao2_ref(hook, -1);
	}
	ao2_iterator_destroy(&it);
}

int ast_config_hook_register(const char *name,
		const char *filename,
		const char *module,
		enum config_hook_flags flags,
		config_hook_cb hook_cb)
{
	struct cfg_hook *hook;
	if (!cfg_hooks && !(cfg_hooks = ao2_container_alloc(17, hook_hash, hook_cmp))) {
		return -1;
	}

	if (!(hook = ao2_alloc(sizeof(*hook), hook_destroy))) {
		return -1;
	}

	hook->hook_cb = hook_cb;
	hook->filename = ast_strdup(filename);
	hook->name = ast_strdup(name);
	hook->module = ast_strdup(module);

	ao2_link(cfg_hooks, hook);
	ao2_ref(hook, -1);
	return 0;
}