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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 2015 Oracle and/or its affiliates. All rights reserved.
*
* $Id$
*/
#include <sys/types.h>
#include <errno.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef _WIN32
extern int getopt(int, char * const *, const char *);
#else
#include <unistd.h>
#endif
#include <db.h>
int db_setup __P((const char *, const char *, FILE *, const char *));
int db_teardown __P((const char *, const char *, FILE *, const char *));
static int usage __P((void));
const char *progname = "ex_env"; /* Program name. */
int EnvFlags =
DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN;
/*
* An example of a program creating/configuring a Berkeley DB environment.
*/
int
main(argc, argv)
int argc;
char *argv[];
{
extern char *optarg;
extern int optind;
const char *data_dir, *home;
int ch;
/*
* All of the shared database files live in home, but
* data files will live in data_dir.
*/
home = "TESTDIR";
data_dir = "data";
while ((ch = getopt(argc, argv, "h:d:l")) != EOF)
switch (ch) {
case 'h':
home = optarg;
break;
case 'd':
data_dir = optarg;
break;
case 'l':
EnvFlags |= DB_LOCKDOWN;
break;
case '?':
default:
return (usage());
}
argc -= optind;
argv += optind;
if (argc != 0)
return (usage());
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;
DB *dbp;
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, EnvFlags, 0644)) != 0) {
dbenv->err(dbenv, ret, "environment open: %s", home);
if (ret == ENOENT) {
printf("Please check whether home dir \"%s\" existed.\n",
home);
}
dbenv->close(dbenv, 0);
return (1);
}
/*
* Open a database in the environment to verify the data_dir
* has been set correctly.
* Create a database object and initialize it for error
* reporting.
*/
if ((ret = db_create(&dbp, dbenv, 0)) != 0) {
fprintf(errfp, "%s: %s\n", progname, db_strerror(ret));
return (1);
}
/* Open a database with DB_BTREE access method. */
if ((ret = dbp->open(dbp, NULL, "exenv_db1.db", NULL,
DB_BTREE, DB_CREATE, 0644)) != 0) {
fprintf(stderr, "database open: %s\n", db_strerror(ret));
if (ret == ENOENT) {
printf("Please check whether data dir \"%s\" "
"exists under \"%s\".\n", data_dir, home);
}
return (1);
}
/* Close the database handle. */
if ((ret = dbp->close(dbp, 0)) != 0) {
fprintf(stderr, "database close: %s\n", db_strerror(ret));
return (1);
}
/* Close the environment 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);
/* Remove the environment. */
if ((ret = dbenv->remove(dbenv, home, 0)) != 0) {
fprintf(stderr, "DB_ENV->remove: %s\n", db_strerror(ret));
return (1);
}
return (0);
}
static int
usage()
{
(void)fprintf(stderr,
"usage: %s [-l] [-h home] [-d data_dir]\n", progname);
return (EXIT_FAILURE);
}
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