2 * Asterisk -- An open source telephony toolkit.
4 * Copyright (C) 2005-2006, Russell Bryant <russelb@clemson.edu>
6 * func_db.c adapted from the old app_db.c, copyright by the following people
7 * Copyright (C) 2005, Mark Spencer <markster@digium.com>
8 * Copyright (C) 2003, Jefferson Noxon <jeff@debian.org>
10 * See http://www.asterisk.org for more information about
11 * the Asterisk project. Please do not directly contact
12 * any of the maintainers of this project for assistance;
13 * the project provides a web site, mailing lists and IRC
14 * channels for your use.
16 * This program is free software, distributed under the terms of
17 * the GNU General Public License Version 2. See the LICENSE file
18 * at the top of the source tree.
23 * \brief Functions for interaction with the Asterisk database
25 * \author Russell Bryant <russelb@clemson.edu>
32 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
36 #include "asterisk/module.h"
37 #include "asterisk/channel.h"
38 #include "asterisk/pbx.h"
39 #include "asterisk/utils.h"
40 #include "asterisk/app.h"
41 #include "asterisk/astdb.h"
43 static int function_db_read(struct ast_channel *chan, const char *cmd,
44 char *parse, char *buf, size_t len)
46 AST_DECLARE_APP_ARGS(args,
53 if (ast_strlen_zero(parse)) {
54 ast_log(LOG_WARNING, "DB requires an argument, DB(<family>/<key>)\n");
58 AST_NONSTANDARD_APP_ARGS(args, parse, '/');
61 ast_log(LOG_WARNING, "DB requires an argument, DB(<family>/<key>)\n");
65 if (ast_db_get(args.family, args.key, buf, len - 1)) {
66 ast_debug(1, "DB: %s/%s not found in database.\n", args.family, args.key);
68 pbx_builtin_setvar_helper(chan, "DB_RESULT", buf);
74 static int function_db_write(struct ast_channel *chan, const char *cmd, char *parse,
77 AST_DECLARE_APP_ARGS(args,
82 if (ast_strlen_zero(parse)) {
83 ast_log(LOG_WARNING, "DB requires an argument, DB(<family>/<key>)=<value>\n");
87 AST_NONSTANDARD_APP_ARGS(args, parse, '/');
90 ast_log(LOG_WARNING, "DB requires an argument, DB(<family>/<key>)=value\n");
94 if (ast_db_put(args.family, args.key, value)) {
95 ast_log(LOG_WARNING, "DB: Error writing value to database.\n");
101 static struct ast_custom_function db_function = {
103 .synopsis = "Read from or write to the Asterisk database",
104 .syntax = "DB(<family>/<key>)",
106 "This function will read from or write a value to the Asterisk database. On a\n"
107 "read, this function returns the corresponding value from the database, or blank\n"
108 "if it does not exist. Reading a database value will also set the variable\n"
109 "DB_RESULT. If you wish to find out if an entry exists, use the DB_EXISTS\n"
111 .read = function_db_read,
112 .write = function_db_write,
115 static int function_db_exists(struct ast_channel *chan, const char *cmd,
116 char *parse, char *buf, size_t len)
118 AST_DECLARE_APP_ARGS(args,
125 if (ast_strlen_zero(parse)) {
126 ast_log(LOG_WARNING, "DB_EXISTS requires an argument, DB(<family>/<key>)\n");
130 AST_NONSTANDARD_APP_ARGS(args, parse, '/');
133 ast_log(LOG_WARNING, "DB_EXISTS requires an argument, DB(<family>/<key>)\n");
137 if (ast_db_get(args.family, args.key, buf, len - 1)) {
140 pbx_builtin_setvar_helper(chan, "DB_RESULT", buf);
147 static struct ast_custom_function db_exists_function = {
149 .synopsis = "Check to see if a key exists in the Asterisk database",
150 .syntax = "DB_EXISTS(<family>/<key>)",
152 "This function will check to see if a key exists in the Asterisk\n"
153 "database. If it exists, the function will return \"1\". If not,\n"
154 "it will return \"0\". Checking for existence of a database key will\n"
155 "also set the variable DB_RESULT to the key's value if it exists.\n",
156 .read = function_db_exists,
159 static int function_db_delete(struct ast_channel *chan, const char *cmd,
160 char *parse, char *buf, size_t len)
162 AST_DECLARE_APP_ARGS(args,
169 if (ast_strlen_zero(parse)) {
170 ast_log(LOG_WARNING, "DB_DELETE requires an argument, DB_DELETE(<family>/<key>)\n");
174 AST_NONSTANDARD_APP_ARGS(args, parse, '/');
177 ast_log(LOG_WARNING, "DB_DELETE requires an argument, DB_DELETE(<family>/<key>)\n");
181 if (ast_db_get(args.family, args.key, buf, len - 1)) {
182 ast_debug(1, "DB_DELETE: %s/%s not found in database.\n", args.family, args.key);
184 if (ast_db_del(args.family, args.key)) {
185 ast_debug(1, "DB_DELETE: %s/%s could not be deleted from the database\n", args.family, args.key);
189 pbx_builtin_setvar_helper(chan, "DB_RESULT", buf);
195 static struct ast_custom_function db_delete_function = {
197 .synopsis = "Return a value from the database and delete it",
198 .syntax = "DB_DELETE(<family>/<key>)",
200 "This function will retrieve a value from the Asterisk database\n"
201 " and then remove that key from the database. DB_RESULT\n"
202 "will be set to the key's value if it exists.\n",
203 .read = function_db_delete,
206 static int unload_module(void)
210 res |= ast_custom_function_unregister(&db_function);
211 res |= ast_custom_function_unregister(&db_exists_function);
212 res |= ast_custom_function_unregister(&db_delete_function);
217 static int load_module(void)
221 res |= ast_custom_function_register(&db_function);
222 res |= ast_custom_function_register(&db_exists_function);
223 res |= ast_custom_function_register(&db_delete_function);
228 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Database (astdb) related dialplan functions");