pq_connect.c

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/*
   This file is part of GNUnet
   Copyright (C) 2017 GNUnet e.V.

   GNUnet is free software: you can redistribute it and/or modify it
   under the terms of the GNU Affero General Public License as published
   by the Free Software Foundation, either version 3 of the License,
   or (at your option) any later version.

   GNUnet 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
   Affero General Public License for more details.

   You should have received a copy of the GNU Affero General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
 */
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_pq_lib.h"


static void
pq_notice_receiver_cb(void *arg,
                      const PGresult *res)
{
  /* do nothing, intentionally */
}


static void
pq_notice_processor_cb(void *arg,
                       const char *message)
{
  GNUNET_log_from(GNUNET_ERROR_TYPE_INFO,
                  "pq",
                  "%s",
                  message);
}


PGconn *
GNUNET_PQ_connect(const char *config_str)
{
  PGconn *conn;

  conn = PQconnectdb(config_str);
  if ((NULL == conn) ||
      (CONNECTION_OK !=
       PQstatus(conn)))
    {
      GNUNET_log_from(GNUNET_ERROR_TYPE_ERROR,
                      "pq",
                      "Database connection to '%s' failed: %s\n",
                      config_str,
                      (NULL != conn) ?
                      PQerrorMessage(conn)
                      : "PQconnectdb returned NULL");
      if (NULL != conn)
        PQfinish(conn);
      return NULL;
    }
  PQsetNoticeReceiver(conn,
                      &pq_notice_receiver_cb,
                      conn);
  PQsetNoticeProcessor(conn,
                       &pq_notice_processor_cb,
                       conn);
  return conn;
}


PGconn *
GNUNET_PQ_connect_with_cfg(const struct GNUNET_CONFIGURATION_Handle * cfg,
                           const char *section)
{
  PGconn *dbh;
  char *conninfo;

  /* Open database and precompile statements */
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string(cfg,
                                            section,
                                            "CONFIG",
                                            &conninfo))
    conninfo = NULL;
  dbh = GNUNET_PQ_connect(conninfo == NULL ? "" : conninfo);
  GNUNET_free_non_null(conninfo);
  return dbh;
}


/* end of pq/pq_connect.c */