2008-03-13 14:14:44 +00:00
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/*
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* Copyright (C) 2007 Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* $Id$
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*/
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#include "plugin_loader.h"
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#include <dlfcn.h>
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#include <debug.h>
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#include <utils/linked_list.h>
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#include <plugins/plugin.h>
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typedef struct private_plugin_loader_t private_plugin_loader_t;
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/**
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* private data of plugin_loader
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*/
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struct private_plugin_loader_t {
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/**
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* public functions
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*/
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plugin_loader_t public;
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/**
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* list of loaded plugins
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*/
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linked_list_t *plugins;
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};
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/**
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* Implementation of plugin_loader_t.load_plugins.
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*/
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static int load(private_plugin_loader_t *this, char *path, char *prefix)
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{
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enumerator_t *enumerator;
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char *file, *ending, *rel;
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void *handle;
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int count = 0;
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enumerator = enumerator_create_directory(path);
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if (!enumerator)
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{
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DBG1("opening plugin directory %s failed", path);
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return 0;
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}
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2008-05-13 09:14:36 +00:00
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DBG2("loading plugins from %s", path);
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2008-03-13 14:14:44 +00:00
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while (enumerator->enumerate(enumerator, &rel, &file, NULL))
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{
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plugin_t *plugin;
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plugin_constructor_t constructor;
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ending = file + strlen(file) - 3;
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if (ending <= file || !streq(ending, ".so"))
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{ /* only process .so libraries */
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continue;
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}
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if (!strneq(prefix, rel, strlen(prefix)))
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{
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continue;
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}
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handle = dlopen(file, RTLD_LAZY);
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if (handle == NULL)
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{
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DBG1("loading plugin %s failed: %s", rel, dlerror());
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continue;
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}
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constructor = dlsym(handle, "plugin_create");
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if (constructor == NULL)
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{
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DBG1("plugin %s has no plugin_create() function, skipped", rel);
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dlclose(handle);
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continue;
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}
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plugin = constructor();
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if (plugin == NULL)
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{
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DBG1("plugin %s constructor failed, skipping", rel);
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dlclose(handle);
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continue;
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}
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2008-05-13 09:14:36 +00:00
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DBG2("plugin %s loaded successfully", rel);
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2008-03-13 14:14:44 +00:00
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/* insert in front to destroy them in reverse order */
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this->plugins->insert_last(this->plugins, plugin);
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/* we do not store or free dlopen() handles, leak_detective requires
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* the modules to keep loaded until leak report */
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count++;
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}
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enumerator->destroy(enumerator);
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return count;
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}
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/**
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* Implementation of plugin_loader_t.destroy
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*/
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static void destroy(private_plugin_loader_t *this)
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{
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this->plugins->destroy_offset(this->plugins, offsetof(plugin_t, destroy));
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free(this);
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}
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/*
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* see header file
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*/
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plugin_loader_t *plugin_loader_create()
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{
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private_plugin_loader_t *this = malloc_thing(private_plugin_loader_t);
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this->public.load = (int(*)(plugin_loader_t*, char *path, char *prefix))load;
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this->public.destroy = (void(*)(plugin_loader_t*))destroy;
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this->plugins = linked_list_create();
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return &this->public;
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}
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