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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2008, Digium, Inc.
*
* Russell Bryant <russell@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief A function to retrieve variables from an Asterisk configuration file
*
* \author Russell Bryant <russell@digium.com>
*
* \ingroup functions
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/app.h"
static int config_function_read(struct ast_channel *chan, const char *cmd, char *data,
char *buf, size_t len)
{
struct ast_config *cfg;
struct ast_flags cfg_flags = { 0 };
const char *val;
char *parse;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(filename);
AST_APP_ARG(category);
AST_APP_ARG(variable);
AST_APP_ARG(index);
);
if (ast_strlen_zero(data)) {
ast_log(LOG_ERROR, "AST_CONFIG() requires an argument\n");
return -1;
}
parse = ast_strdupa(data);
AST_STANDARD_APP_ARGS(args, parse);
if (ast_strlen_zero(args.filename)) {
ast_log(LOG_ERROR, "AST_CONFIG() requires a filename\n");
return -1;
}
if (ast_strlen_zero(args.category)) {
ast_log(LOG_ERROR, "AST_CONFIG() requires a category\n");
return -1;
}
if (ast_strlen_zero(args.variable)) {
ast_log(LOG_ERROR, "AST_CONFIG() requires a variable\n");
return -1;
}
if (!(cfg = ast_config_load(args.filename, cfg_flags))) {
return -1;
}
if (!(val = ast_variable_retrieve(cfg, args.category, args.variable))) {
ast_log(LOG_ERROR, "'%s' not found in [%s] of '%s'\n", args.variable,
args.category, args.filename);
return -1;
}
ast_copy_string(buf, val, len);
ast_config_destroy(cfg);
return 0;
}
static struct ast_custom_function config_function = {
.name = "AST_CONFIG",
.syntax = "AST_CONFIG(config_file,category,variable_name)",
.synopsis = "Retrieve a variable from a configuration file",
.desc =
" This function reads a variable from an Asterisk configuration file.\n"
"",
.read = config_function_read,
};
static int unload_module(void)
{
return ast_custom_function_unregister(&config_function);
}
static int load_module(void)
{
return ast_custom_function_register(&config_function);
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Asterisk configuration file variable access");
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