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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2009 Sun Microsystems
*
* This program 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; version 2 of the License.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <dlfcn.h>
#include <cerrno>
#include <string>
#include <boost/filesystem.hpp>
#include "drizzled/plugin.h"
#include "drizzled/definitions.h"
#include "drizzled/error.h"
#include "drizzled/errmsg_print.h"
#include "drizzled/module/library.h"
using namespace std;
namespace fs=boost::filesystem;
namespace drizzled
{
module::Library::Library(const std::string &name_arg,
void *handle_arg,
const Manifest *manifest_arg)
: name(name_arg), handle(handle_arg), manifest(manifest_arg)
{}
module::Library::~Library()
{
/**
* @TODO: This breaks valgrind at the moment.
if (handle)
dlclose(handle);
*/
}
const fs::path module::Library::getLibraryPath(const string &plugin_name)
{
string plugin_lib_name("lib");
plugin_lib_name.append(plugin_name);
plugin_lib_name.append("_plugin");
#if defined(TARGET_OS_OSX)
plugin_lib_name.append(".dylib");
#else
plugin_lib_name.append(".so");
#endif
/* Compile dll path */
return plugin_dir / plugin_lib_name;
}
module::Library *module::Library::loadLibrary(const string &plugin_name, bool builtin)
{
/*
Ensure that the dll doesn't have a path.
This is done to ensure that only approved libraries from the
plugin directory are used (to make this even remotely secure).
*/
size_t found= plugin_name.find(FN_LIBCHAR);
if (found != string::npos)
{
errmsg_printf(ERRMSG_LVL_ERROR, "%s",ER(ER_PLUGIN_NO_PATHS));
return NULL;
}
void *dl_handle= NULL;
string dlpath("");
if (builtin)
{
dlpath.assign("<builtin>");
dl_handle= dlopen(NULL, RTLD_NOW|RTLD_LOCAL);
if (dl_handle == NULL)
{
const char *errmsg= dlerror();
errmsg_printf(ERRMSG_LVL_ERROR, ER(ER_CANT_OPEN_LIBRARY),
dlpath.c_str(), errno, errmsg);
(void)dlerror();
return NULL;
}
}
else
{
/* Open new dll handle */
dlpath.assign(Library::getLibraryPath(plugin_name).file_string());
dl_handle= dlopen(dlpath.c_str(), RTLD_NOW|RTLD_GLOBAL);
if (dl_handle == NULL)
{
const char *errmsg= dlerror();
uint32_t dlpathlen= dlpath.length();
if (not dlpath.compare(0, dlpathlen, errmsg))
{ // if errmsg starts from dlpath, trim this prefix.
errmsg+= dlpathlen;
if (*errmsg == ':') errmsg++;
if (*errmsg == ' ') errmsg++;
}
errmsg_printf(ERRMSG_LVL_ERROR, ER(ER_CANT_OPEN_LIBRARY),
dlpath.c_str(), errno, errmsg);
// This, in theory, should cause dlerror() to deallocate the error
// message. Found this via Google'ing :)
(void)dlerror();
return NULL;
}
}
string plugin_decl_sym("_drizzled_");
plugin_decl_sym.append(plugin_name);
plugin_decl_sym.append("_plugin_");
/* Find plugin declarations */
void *sym= dlsym(dl_handle, plugin_decl_sym.c_str());
if (sym == NULL)
{
const char* errmsg= dlerror();
errmsg_printf(ERRMSG_LVL_ERROR, errmsg);
errmsg_printf(ERRMSG_LVL_ERROR, ER(ER_CANT_FIND_DL_ENTRY),
plugin_decl_sym.c_str(), dlpath.c_str());
(void)dlerror();
dlclose(dl_handle);
return NULL;
}
const Manifest *module_manifest= static_cast<module::Manifest *>(sym);
if (module_manifest->drizzle_version != DRIZZLE_VERSION_ID)
{
errmsg_printf(ERRMSG_LVL_ERROR,
_("Plugin module %s was compiled for version %" PRIu64 ", "
"which does not match the current running version of "
"Drizzle: %" PRIu64"."),
dlpath.c_str(), module_manifest->drizzle_version,
DRIZZLE_VERSION_ID);
return NULL;
}
return new (nothrow) module::Library(plugin_name, dl_handle, module_manifest);
}
} /* namespace drizzled */
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