func_config.c File Reference
A function to retrieve variables from an Asterisk configuration file. More...
#include "asterisk.h"#include "asterisk/module.h"#include "asterisk/channel.h"#include "asterisk/pbx.h"#include "asterisk/app.h"
Go to the source code of this file.
Data Structures | |
| struct | config_item |
| struct | configs |
Functions | |
| static void | __fini_configs (void) |
| static void | __init_configs (void) |
| static void | __reg_module (void) |
| static void | __unreg_module (void) |
| static int | config_function_read (struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len) |
| static int | load_module (void) |
| static int | unload_module (void) |
Variables | |
| static struct ast_module_info __MODULE_INFO_SECTION | __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Asterisk configuration file variable access" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, } |
| static struct ast_module_info * | ast_module_info = &__mod_info |
| static struct ast_custom_function | config_function |
| static struct configs | configs |
Detailed Description
A function to retrieve variables from an Asterisk configuration file.
Definition in file func_config.c.
Function Documentation
| static void __fini_configs | ( | void | ) | [static] |
Definition at line 62 of file func_config.c.
{
| static void __init_configs | ( | void | ) | [static] |
Definition at line 62 of file func_config.c.
{
| static void __reg_module | ( | void | ) | [static] |
Definition at line 203 of file func_config.c.
| static void __unreg_module | ( | void | ) | [static] |
Definition at line 203 of file func_config.c.
| static int config_function_read | ( | struct ast_channel * | chan, |
| const char * | cmd, | ||
| char * | data, | ||
| char * | buf, | ||
| size_t | len | ||
| ) | [static] |
Definition at line 64 of file func_config.c.
References AST_APP_ARG, ast_clear_flag, ast_config_destroy(), ast_config_load, ast_copy_string(), AST_DECLARE_APP_ARGS, ast_free, ast_log(), ast_malloc, AST_RWLIST_INSERT_TAIL, AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, AST_STANDARD_APP_ARGS, ast_strdupa, ast_strlen_zero(), ast_variable_retrieve(), CONFIG_FLAG_FILEUNCHANGED, CONFIG_STATUS_FILEINVALID, CONFIG_STATUS_FILEUNCHANGED, LOG_ERROR, parse(), and val.
{
struct ast_config *cfg;
struct ast_flags cfg_flags = { CONFIG_FLAG_FILEUNCHANGED };
const char *val;
char *parse;
struct config_item *cur;
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)) || cfg == CONFIG_STATUS_FILEINVALID) {
return -1;
}
if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
/* Retrieve cfg from list */
AST_RWLIST_RDLOCK(&configs);
AST_RWLIST_TRAVERSE(&configs, cur, entry) {
if (!strcmp(cur->filename, args.filename)) {
break;
}
}
if (!cur) {
/* At worst, we might leak an entry while upgrading locks */
AST_RWLIST_UNLOCK(&configs);
AST_RWLIST_WRLOCK(&configs);
if (!(cur = ast_malloc(sizeof(*cur) + strlen(args.filename) + 1))) {
AST_RWLIST_UNLOCK(&configs);
return -1;
}
strcpy(cur->filename, args.filename);
ast_clear_flag(&cfg_flags, CONFIG_FLAG_FILEUNCHANGED);
if (!(cfg = ast_config_load(args.filename, cfg_flags)) || cfg == CONFIG_STATUS_FILEINVALID) {
ast_free(cur);
AST_RWLIST_UNLOCK(&configs);
return -1;
}
cur->cfg = cfg;
AST_RWLIST_INSERT_TAIL(&configs, cur, entry);
}
cfg = cur->cfg;
} else {
/* Replace cfg in list */
AST_RWLIST_WRLOCK(&configs);
AST_RWLIST_TRAVERSE(&configs, cur, entry) {
if (!strcmp(cur->filename, args.filename)) {
break;
}
}
if (!cur) {
if (!(cur = ast_malloc(sizeof(*cur) + strlen(args.filename) + 1))) {
AST_RWLIST_UNLOCK(&configs);
return -1;
}
strcpy(cur->filename, args.filename);
cur->cfg = cfg;
AST_RWLIST_INSERT_TAIL(&configs, cur, entry);
} else {
ast_config_destroy(cur->cfg);
cur->cfg = cfg;
}
}
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);
AST_RWLIST_UNLOCK(&configs);
return -1;
}
ast_copy_string(buf, val, len);
/* Unlock down here, so there's no chance the struct goes away while we're using it. */
AST_RWLIST_UNLOCK(&configs);
return 0;
}
| static int load_module | ( | void | ) | [static] |
Definition at line 198 of file func_config.c.
References ast_custom_function_register.
{
return ast_custom_function_register(&config_function);
}
| static int unload_module | ( | void | ) | [static] |
Definition at line 183 of file func_config.c.
References ast_config_destroy(), ast_custom_function_unregister(), ast_free, AST_RWLIST_REMOVE_HEAD, AST_RWLIST_UNLOCK, and AST_RWLIST_WRLOCK.
{
struct config_item *current;
int res = ast_custom_function_unregister(&config_function);
AST_RWLIST_WRLOCK(&configs);
while ((current = AST_RWLIST_REMOVE_HEAD(&configs, entry))) {
ast_config_destroy(current->cfg);
ast_free(current);
}
AST_RWLIST_UNLOCK(&configs);
return res;
}
Variable Documentation
struct ast_module_info __MODULE_INFO_SECTION __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Asterisk configuration file variable access" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, } [static] |
Definition at line 203 of file func_config.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 203 of file func_config.c.
struct ast_custom_function config_function [static] |
{
.name = "AST_CONFIG",
.read = config_function_read,
}
Definition at line 178 of file func_config.c.
