Viewing file:  ex_env.c (3.09 KB) -rw-r--r--
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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996-2004
* Sleepycat Software. All rights reserved.
*
* $Id: ex_env.c,v 11.29 2004/01/28 03:36:03 bostic Exp $
*/
#include <sys/types.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <db.h>
#ifdef macintosh
#define DATABASE_HOME ":database"
#define CONFIG_DATA_DIR ":database"
#else
#ifdef DB_WIN32
#define DATABASE_HOME "\\tmp\\database"
#define CONFIG_DATA_DIR "\\database\\files"
#else
#define DATABASE_HOME "/tmp/database"
#define CONFIG_DATA_DIR "/database/files"
#endif
#endif
int db_setup __P((const char *, const char *, FILE *, const char *));
int db_teardown __P((const char *, const char *, FILE *, const char *));
int main __P((void));
/*
* An example of a program creating/configuring a Berkeley DB environment.
*/
int
main()
{
const char *data_dir, *home;
const char *progname = "ex_env"; /* Program name. */
/*
* All of the shared database files live in DATABASE_HOME, but
* data files will live in CONFIG_DATA_DIR.
*/
home = DATABASE_HOME;
data_dir = CONFIG_DATA_DIR;
printf("Setup env\n");
if (db_setup(home, data_dir, stderr, progname) != 0)
return (EXIT_FAILURE);
printf("Teardown env\n");
if (db_teardown(home, data_dir, stderr, progname) != 0)
return (EXIT_FAILURE);
return (EXIT_SUCCESS);
}
int
db_setup(home, data_dir, errfp, progname)
const char *home, *data_dir, *progname;
FILE *errfp;
{
DB_ENV *dbenv;
int ret;
/*
* Create an environment object and initialize it for error
* reporting.
*/
if ((ret = db_env_create(&dbenv, 0)) != 0) {
fprintf(errfp, "%s: %s\n", progname, db_strerror(ret));
return (1);
}
dbenv->set_errfile(dbenv, errfp);
dbenv->set_errpfx(dbenv, progname);
/*
* We want to specify the shared memory buffer pool cachesize,
* but everything else is the default.
*/
if ((ret = dbenv->set_cachesize(dbenv, 0, 64 * 1024, 0)) != 0) {
dbenv->err(dbenv, ret, "set_cachesize");
dbenv->close(dbenv, 0);
return (1);
}
/* Databases are in a subdirectory. */
(void)dbenv->set_data_dir(dbenv, data_dir);
/* Open the environment with full transactional support. */
if ((ret = dbenv->open(dbenv, home,
DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN,
0)) != 0) {
dbenv->err(dbenv, ret, "environment open: %s", home);
dbenv->close(dbenv, 0);
return (1);
}
/* Do something interesting... */
/* Close the handle. */
if ((ret = dbenv->close(dbenv, 0)) != 0) {
fprintf(stderr, "DB_ENV->close: %s\n", db_strerror(ret));
return (1);
}
return (0);
}
int
db_teardown(home, data_dir, errfp, progname)
const char *home, *data_dir, *progname;
FILE *errfp;
{
DB_ENV *dbenv;
int ret;
/* Remove the shared database regions. */
if ((ret = db_env_create(&dbenv, 0)) != 0) {
fprintf(errfp, "%s: %s\n", progname, db_strerror(ret));
return (1);
}
dbenv->set_errfile(dbenv, errfp);
dbenv->set_errpfx(dbenv, progname);
(void)dbenv->set_data_dir(dbenv, data_dir);
if ((ret = dbenv->remove(dbenv, home, 0)) != 0) {
fprintf(stderr, "DB_ENV->remove: %s\n", db_strerror(ret));
return (1);
}
return (0);
}
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