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/*
This file is part of TALER
Copyright (C) 2015 Christian Grothoff (and other contributing authors)
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file mintdb/mintdb_plugin.c
* @brief Logic to load database plugin
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_mintdb_lib.h"
#include "taler_mintdb_plugin.h"
#include <ltdl.h>
/**
* Libtool search path before we started.
*/
static char *old_dlsearchpath;
/**
* Initialize the plugin.
*
* @param cfg configuration to use
* @return #GNUNET_OK on success
*/
struct TALER_MINTDB_Plugin *
TALER_MINT_plugin_load (const struct GNUNET_CONFIGURATION_Handle *cfg)
{
char *plugin_name;
char *lib_name;
struct GNUNET_CONFIGURATION_Handle *cfg_dup;
struct TALER_MINTDB_Plugin *plugin;
if (GNUNET_SYSERR ==
GNUNET_CONFIGURATION_get_value_string (cfg,
"mint",
"db",
&plugin_name))
{
GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
"mint",
"db");
return NULL;
}
(void) GNUNET_asprintf (&lib_name,
"libtaler_plugin_mintdb_%s",
plugin_name);
GNUNET_free (plugin_name);
cfg_dup = GNUNET_CONFIGURATION_dup (cfg);
plugin = GNUNET_PLUGIN_load (lib_name, cfg_dup);
if (NULL != plugin)
plugin->library_name = lib_name;
else
GNUNET_free (lib_name);
GNUNET_CONFIGURATION_destroy (cfg_dup);
return plugin;
}
/**
* Shutdown the plugin.
*
* @param plugin the plugin to unload
*/
void
TALER_MINT_plugin_unload (struct TALER_MINTDB_Plugin *plugin)
{
char *lib_name;
if (NULL == plugin)
return;
lib_name = plugin->library_name;
GNUNET_assert (NULL == GNUNET_PLUGIN_unload (lib_name,
plugin));
GNUNET_free (lib_name);
}
/**
* Setup libtool paths.
*/
void __attribute__ ((constructor))
plugin_init ()
{
int err;
const char *opath;
char *path;
char *cpath;
err = lt_dlinit ();
if (err > 0)
{
FPRINTF (stderr,
_("Initialization of plugin mechanism failed: %s!\n"),
lt_dlerror ());
return;
}
opath = lt_dlgetsearchpath ();
if (NULL != opath)
old_dlsearchpath = GNUNET_strdup (opath);
path = TALER_os_installation_get_path (GNUNET_OS_IPK_LIBDIR);
if (NULL != path)
{
if (NULL != opath)
{
GNUNET_asprintf (&cpath, "%s:%s", opath, path);
lt_dlsetsearchpath (cpath);
GNUNET_free (path);
GNUNET_free (cpath);
}
else
{
lt_dlsetsearchpath (path);
GNUNET_free (path);
}
}
}
/**
* Shutdown libtool.
*/
void __attribute__ ((destructor))
plugin_fini ()
{
lt_dlsetsearchpath (old_dlsearchpath);
if (NULL != old_dlsearchpath)
{
GNUNET_free (old_dlsearchpath);
old_dlsearchpath = NULL;
}
lt_dlexit ();
}
/* end of plugin.c */
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