stasis-aries-wal/test/lladd-old/db41/dbGet.c

/*---
This software is copyrighted by the Regents of the University of
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each file where they apply.
                                                                                                                                  
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POSSIBILITY OF SUCH DAMAGE.
                                                                                                                                  
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
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the software and related documentation as defined in the Federal
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---*/
	
#include "../../pbl/jbhash.h"
#include <db.h>
#include <errno.h>
#include <pthread.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <assert.h>
#define DATABASE "access.db"
#define ENV_DIRECTORY   "TXNAPP"

#define VERBOSE 0
#define SEED 5095
int db_open(DB_ENV *dbenv, DB **dbp, char *name, int dups);

void env_open(DB_ENV **dbenvp);

void env_dir_create();


int main(int argc, char **argv) {
	DB *dbp;
	DB_ENV *dbenv;
	DBT key, data;
	db_recno_t recno;

	int num_trials;

	if (argc != 2)  {
		printf("usage: %s <num trials>\n", argv[0]);
		exit(-1);
	}


	env_dir_create();
	env_open(&dbenv);
	if (db_open(dbenv, &dbp, DATABASE, 0))
		return (1); 	

        memset(&key, 0, sizeof(DBT));
        memset(&data, 0, sizeof(DBT));

	db_open(dbenv, &dbp, DATABASE, 0);



	num_trials = atoi(argv[1]);
	for (recno = 1; (int)recno <= num_trials; recno++) {
		memset(&key, 0, sizeof(key));	
		memset(&data, 0, sizeof(data));
		key.size = sizeof(recno);


		key.data = &recno;
		data.flags = DB_DBT_MALLOC;
		dbp->get(dbp, NULL, &key, &data, 0);
		if (VERBOSE) {
			printf("get got %s\n", (char *)data.data);
		}
		
	}

		


	return 0;

}


int db_open(DB_ENV *dbenv, DB **dbp, char *name, int dups) {
        DB *db;
        int ret;


        /* Create the database handle. */
        if ((ret = db_create(&db, dbenv, 0)) != 0) {
                dbenv->err(dbenv, ret, "db_create");
                return (1);
        }


        /* Optionally, turn on duplicate data items. */
        if (dups && (ret = db->set_flags(db, DB_DUP)) != 0) {
                (void)db->close(db, 0);
                dbenv->err(dbenv, ret, "db->set_flags: DB_DUP");
                return (1);
        }


        /*
         * Open a database in the environment:
         *      create if it doesn't exist
         *      free-threaded handle
         *      read/write owner only
         */
        if ((ret = db->open(db, NULL, name, NULL, DB_BTREE,
            DB_AUTO_COMMIT | DB_CREATE | DB_THREAD, S_IRUSR | S_IWUSR)) != 0) {
                (void)db->close(db, 0);
                dbenv->err(dbenv, ret, "db->open: %s", name);
                return (1);
        }


        *dbp = db;
        return (0);
}


void env_open(DB_ENV **dbenvp) {
        DB_ENV *dbenv;
        int ret;


        /* Create the environment handle. */
        if ((ret = db_env_create(&dbenv, 0)) != 0) {
                fprintf(stderr,
                    "txnapp: db_env_create: %s\n", db_strerror(ret));
                exit (1);
        }


        /* Set up error handling. */
        dbenv->set_errpfx(dbenv, "txnapp");
        dbenv->set_errfile(dbenv, stderr);


        /*
         * Open a transactional environment:
         *      create if it doesn't exist
         *      free-threaded handle
         *      run recovery
         *      read/write owner only
         */
        if ((ret = dbenv->open(dbenv, ENV_DIRECTORY,
            DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG |
            DB_INIT_MPOOL | DB_INIT_TXN | DB_RECOVER | DB_THREAD,
            S_IRUSR | S_IWUSR)) != 0) {
                (void)dbenv->close(dbenv, 0);
                fprintf(stderr, "dbenv->open: %s: %s\n",
                    ENV_DIRECTORY, db_strerror(ret));
                exit (1);
        }


        *dbenvp = dbenv;
}


void env_dir_create(void) {
        struct stat sb;


        /*
         * If the directory exists, we're done.  We do not further check
         * the type of the file, DB will fail appropriately if it's the
         * wrong type.
         */
        if (stat(ENV_DIRECTORY, &sb) == 0)
                return;


        /* Create the directory, read/write/access owner only. */
        if (mkdir(ENV_DIRECTORY, S_IRWXU) != 0) {
                fprintf(stderr,
                    "txnapp: mkdir: %s: %s\n", ENV_DIRECTORY, strerror(errno));
                exit (1);
        }
}


/*
for (recno = 1; (int)recno <= num_trials; recno++) {
		memset(&key, 0, sizeof(key));	
		memset(&data, 0, sizeof(data));
		key.size = sizeof(recno);


		key.data = &recno;
		data.flags = DB_DBT_MALLOC;
		dbp->get(dbp, NULL, &key, &data, 0);

		printf("get got %s\n", data.data);
		
	}

*/