Geografic-Information-System/lib/db/dbmi_driver/d_opendb.c

/*!
 * \file db/dbmi_driver/d_opendb.c
 * 
 * \brief DBMI Library (driver) - open database connection
 *
 * (C) 1999-2008 by the GRASS Development Team
 *
 * This program is free software under the GNU General Public
 * License (>=v2). Read the file COPYING that comes with GRASS
 * for details.
 *
 * \author Joel Jones (CERL/UIUC), Radim Blazek
 */

#include <stdlib.h>
#include <grass/dbmi.h>
#include "macros.h"
#include "dbstubs.h"

/*!
  \brief Open database connection

  \return DB_OK on success
  \return DB_FAILED on failure
 */
int db_d_open_database(void)
{
    dbHandle handle;
    int stat;

    /* get the arg(s) */
    db_init_handle(&handle);
    DB_RECV_HANDLE(&handle);

    /* see if there is a database already open */
    if (db__test_database_open()) {
	db_error("Multiple open databases not allowed");
	DB_SEND_FAILURE();
	return DB_OK;
    }

    /* call the procedure */
    stat = db_driver_open_database(&handle);

    /* send the return code */
    if (stat != DB_OK) {
	db_free_handle(&handle);
	DB_SEND_FAILURE();
	return DB_OK;
    }
    DB_SEND_SUCCESS();

    /* record the open in the driver state */
    db__mark_database_open(db_get_handle_dbname(&handle),
			   db_get_handle_dbschema(&handle));
    /* DO NOT free the handle since we saved the pointers to the name,path */

    /* no results */
    return DB_OK;
}