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/* ---------------------------------------------------------------------------
* couriergrey - Greylisting filter for Courier
* Copyright (C) 2007-2012 Matthias Wimmer <m@tthias.eu>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
* ---------------------------------------------------------------------------
* vi: sw=4:tabstop=8
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "database.h"
#include <iostream>
#include <sys/stat.h>
#include <cstdio>
#include <stdexcept>
#include <glibmm.h>
#include <unistd.h>
namespace couriergrey {
database::database() : db(NULL) {
for (int retry = 0; db == NULL && retry < 10; retry++) {
db = ::gdbm_open(LOCALSTATEDIR "/cache/" PACKAGE "/deliveryattempts.gdbm", 0, GDBM_WRCREAT, S_IRUSR | S_IWUSR | S_IRGRP, 0);
if (db == NULL && retry < 9) {
::sleep(1);
}
}
if (!db) {
throw Glib::ustring(N_("Could not open database at " LOCALSTATEDIR "/cache/" PACKAGE "/deliveryattempts.gdbm"));
}
}
database::~database() {
// close the database again
if (db) {
::gdbm_close(db);
db = NULL;
}
}
std::string database::fetch(std::string const& key) const {
// generate key
::datum key_datum;
key_datum.dptr = const_cast<char*>(key.c_str());
key_datum.dsize = key.length();
// get the entry for this key
::datum value = ::gdbm_fetch(db, key_datum);
// anything found?
if (!value.dptr) {
return std::string();
}
// convert to string
std::string result = std::string(value.dptr, value.dsize);
// free memory
std::free(value.dptr);
// return result
return result;
}
void database::store(std::string const& key, std::string const& value) {
// generate key
::datum key_datum;
key_datum.dptr = const_cast<char*>(key.c_str());
key_datum.dsize = key.length();
// generate value
::datum value_datum;
value_datum.dptr = const_cast<char*>(value.c_str());
value_datum.dsize = value.length();
::gdbm_store(db, key_datum, value_datum, GDBM_REPLACE);
}
void database::reorganize() {
::gdbm_reorganize(db);
}
void database::del(std::string const& key) {
// generate key
::datum key_datum;
key_datum.dptr = const_cast<char*>(key.c_str());
key_datum.dsize = key.length();
// delete database entry
::gdbm_delete(db, key_datum);
}
std::list<std::string> database::get_keys() {
std::list<std::string> result;
for (::datum key = ::gdbm_firstkey(db); key.dptr; key = ::gdbm_nextkey(db, key)) {
try {
result.push_back(std::string(key.dptr, key.dsize));
} catch (std::length_error len_err) {
std::cerr << "Length error!" << std::endl;
std::cerr << "Length is: " << key.dsize << std::endl;
std::cerr << "Key is: " << key.dptr << std::endl;
}
}
return result;
}
}
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