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authoroej <oej@f38db490-d61c-443f-a65b-d21fe96a405b>2006-10-30 21:48:41 +0000
committeroej <oej@f38db490-d61c-443f-a65b-d21fe96a405b>2006-10-30 21:48:41 +0000
commiteb896134ce40c3124edb593bf9f291f2a2241909 (patch)
tree55bf4b5c1c9abf5a43863e3f5bb7fbf100ff7759
parent5eadfaeff549cc20b1602c727922bd8ca58d2968 (diff)
Adding dialplan function IFMODULE, so you can create dialplans that handle
various PBX installations and checks if a module is loaded before using it. example IFMODULE(chan_sip3.so) issue #6671 in the bug tracker, finally gone. Thanks to mithraen for keeping it updated. git-svn-id: http://svn.digium.com/svn/asterisk/trunk@46513 f38db490-d61c-443f-a65b-d21fe96a405b
-rw-r--r--funcs/func_module.c77
-rw-r--r--include/asterisk/module.h7
-rw-r--r--main/loader.c20
3 files changed, 104 insertions, 0 deletions
diff --git a/funcs/func_module.c b/funcs/func_module.c
new file mode 100644
index 000000000..09d27a0d6
--- /dev/null
+++ b/funcs/func_module.c
@@ -0,0 +1,77 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2006, Digium, Inc.
+ *
+ * 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 Simple module check function
+ * \author Olle E. Johansson, Edvina.net
+ */
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "asterisk/module.h"
+#include "asterisk/channel.h"
+#include "asterisk/pbx.h"
+#include "asterisk/logger.h"
+#include "asterisk/utils.h"
+#include "asterisk/app.h"
+#include "asterisk/module.h"
+
+static int ifmodule_read(struct ast_channel *chan, char *cmd, char *data,
+ char *buf, size_t len)
+{
+ char *ret = "0";
+
+ *buf = '\0';
+
+ if (data)
+ if (ast_module_check(data))
+ ret = "1";
+
+ ast_copy_string(buf, ret, len);
+
+ return 0;
+}
+
+static struct ast_custom_function ifmodule_function = {
+ .name = "IFMODULE",
+ .synopsis = "Checks if an Asterisk module is loaded in memory",
+ .syntax = "IFMODULE(<modulename.so>)",
+ .read = ifmodule_read,
+ .desc = "Checks if a module is loaded. Use the full module name\n"
+ "as shown by the list in \"show modules\". \n"
+ "Returns \"1\" if module exists in memory, otherwise \"0\".\n",
+};
+
+
+static int unload_module(void)
+{
+ return ast_custom_function_unregister(&ifmodule_function);
+}
+
+static int load_module(void)
+{
+ return ast_custom_function_register(&ifmodule_function);
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Checks if Asterisk module is loaded in memory");
diff --git a/include/asterisk/module.h b/include/asterisk/module.h
index 1d00f4504..9d51488d1 100644
--- a/include/asterisk/module.h
+++ b/include/asterisk/module.h
@@ -113,6 +113,13 @@ void ast_update_use_count(void);
int ast_update_module_list(int (*modentry)(const char *module, const char *description, int usecnt, const char *like),
const char *like);
+/*!
+ * \brief Check if module with the name given is loaded
+ * \param name Module name, like "chan_sip.so"
+ * \return 0 if false, 1 if true
+ */
+int ast_module_check(char *name);
+
/*!
* \brief Add a procedure to be run when modules have been updated.
* \param updater The function to run when modules have been updated.
diff --git a/main/loader.c b/main/loader.c
index 192cbd894..c0636142a 100644
--- a/main/loader.c
+++ b/main/loader.c
@@ -871,6 +871,26 @@ int ast_update_module_list(int (*modentry)(const char *module, const char *descr
return total_mod_loaded;
}
+int ast_module_check(char *name)
+{
+ struct ast_module *cur;
+ int unlock = -1;
+ int res = 0;
+
+ if (ast_strlen_zero(name))
+ return 0; /* FALSE */
+
+ if (ast_mutex_trylock(&module_list.lock))
+ unlock = 0;
+ AST_LIST_TRAVERSE(&module_list, cur, entry)
+ if (!res && !strcasecmp(name, cur->resource))
+ res = 1;
+ if (unlock)
+ AST_LIST_UNLOCK(&module_list);
+ return res;
+}
+
+
int ast_loader_register(int (*v)(void))
{
struct loadupdate *tmp;