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