BerkeleyDB cursor in C

bdb-cursor.c

#include <stdio.h>
#include <string.h>
#include <db.h>

#define FILE "some.db"

int main() {
    DBT key, data;
    DBC *cursor;
    DB *dbp;
    int ret;

    ret = db_create(&dbp, NULL, 0);
    if (ret != 0) {
        printf("db_create() failed");
        return 1;
    }

    ret = dbp->open(dbp, NULL, FILE, NULL, DB_BTREE, DB_RDONLY, 0);
    if (ret != 0) {
        printf("dbp->open() failed");
        return 1;
    }

    ret = dbp->cursor(dbp, NULL, &cursor, 0);
    if (ret != 0) {
        printf("dbp->cursor() failed");
        return 1;
    }

    memset(&key, 0, sizeof(DBT));
    memset(&data, 0, sizeof(DBT));
    key.flags = DB_DBT_REALLOC;
    data.flags = DB_DBT_REALLOC;
    ret = cursor->c_get(cursor, &key, &data, DB_NEXT);
    if (ret != 0) {
        printf("cursor->c_get() failed");
        return 1;
    }

    char* k;
    k = (char *)key.data;
    printf("key: %s\n", k);
    printf("size: %d\n", key.size);

    free(key.data);
    free(data.data);

    cursor->c_close(cursor);
    dbp->close(dbp, 0);

    return 0;
}

==17538== HEAP SUMMARY:
==17538==     in use at exit: 0 bytes in 0 blocks
==17538==   total heap usage: 51 allocs, 51 frees, 35,894 bytes allocated
==17538==
==17538== All heap blocks were freed -- no leaks are possible