BerkeleyDB安装及配置

安装过程&＃xff1a;
 
(环境&＃xff1a; Kubuntu 7.10)

从其oracle公司官网http://www.oracle.com/technology/software/products/berkeley-db/index.html获得其安装包,当前版本为4.6.21
    #tar zxfv db-4.x.tgz
    #cd db-4.x/build_unix
 (仅用于unix平台安装)
    #../dist/configure
 (主意&＃xff1a;
1、如果以gcc和g&＃43;&＃43;编译的话,须执行#env CC&＃61;gcc CCC&＃61;g&＃43;&＃43; ../dist/configure&＃xff0c;否则编译时出现段错误
2、默认状态,berkeleyDB的lib和include将被安装到/usr/local/BerkeleyDB/下,需要更改这个路径的话,可以加上选项--prefix,例如:#../dist/configure --prefix&＃61;/opt/BerkeleyDB.)
    #make
    #make install
    #vi /etc/ld.so.conf
(并将berkeleyDB的lib路径加到该文件的最后一行,这样才能找到并加载它的库文件.ld.so.conf是系统动态链接库的配置文件.此文件内,存放着可被LINUX共享的动态链接库所在目录的名字(系统目录/lib,/usr/lib除外),各个目录名间以空白字符(空格,换行等)或冒号或逗号分隔.)
    #ldconfig
(#make uninstall卸载)

编译方法(源文件为test.c)&＃xff1a;
    #gcc test.c -ggdb -I/usr/local/BerkeleyDB.4.6/include/ -L/usr/local/BerkeleyDB.4.6/lib/ -ldb -lpthread -o test.out

unix系统参考指南&＃xff1a;http://www.oracle.com/technology/documentation/berkeley-db/db/ref/build_unix/solaris.html
BerkeleyDB参考资料&＃xff1a;http://www.oracle.com/technology/documentation/berkeley-db/db/ref/toc.html


可使用如下程序测试_______________
#include
#include
#include
#include
//only this head should include for use bdb.
#include
#define DATABASE "free.db"
#define DBLOCAT "/home/free/code/cc&＃43;&＃43;/new"

int main()
{
    DB_ENV *myEnv;
    DB *dbp;
    DBT key, data;
    int ret,t_ret;
    u_int32_t env_flags;
    //........... Create an environment object and initialize it for error reporting
    ret &＃61; db_env_create(&myEnv, 0);
    if (ret !&＃61; 0)
    {
        fprintf(stderr, "Error creating env handle: %s/n", db_strerror(ret));
        return -1;
    }
    //........If the environment does not exist create it. Initialize the in-memory cache.
    env_flags &＃61; DB_CREATE | DB_INIT_MPOOL;
    //........Open the environment.
    ret &＃61; myEnv->open(myEnv,DBLOCAT,env_flags,0);
    if (ret !&＃61; 0)
    {
        fprintf(stderr, "Environment open failed: %s", db_strerror(ret));
        return -1;
    }

    if ((ret &＃61; db_create(&dbp, myEnv, 0)) !&＃61; 0)
    {
        fprintf(stderr, "db_create: %s/n", db_strerror(ret));
        exit (1);
    }

    if ((ret &＃61; dbp->open(dbp, NULL, DATABASE, NULL, DB_BTREE, DB_CREATE, 0664)) !&＃61; 0)
    {
        dbp->err(dbp, ret, "%s", DATABASE);
        exit (1);
    }
    memset(&key, 0, sizeof(key));
    memset(&data, 0, sizeof(data)); key.data &＃61; "sport";
    key.size &＃61; sizeof("sport");
    data.data &＃61; "football";
    data.size &＃61; sizeof("football");
    /*
    //......put data
    if ((ret &＃61; dbp->put(dbp, NULL, &key, &data, 0)) &＃61;&＃61; 0)
    {
        printf("db: %s: key stored./n", (char *)key.data);
    }
    else
    {
        dbp->err(dbp, ret, "DB->put");
    }
    */

    //........put data NOOVERWRITE
    if ((ret &＃61; dbp->put(dbp, NULL, &key, &data, DB_NOOVERWRITE)) &＃61;&＃61; 0)
        printf("db: %s: key stored./n", (char *)key.data);
    else
        dbp->err(dbp, ret, "DB->put");

    //.......get data
    if ((ret &＃61; dbp->get(dbp, NULL, &key, &data, 0)) &＃61;&＃61; 0)
        printf("db: %s: key retrieved: data was %s./n", (char *)key.data, (char *)data.data);
    else
        dbp->err(dbp, ret, "DB->get");
     //......del data
    if((ret &＃61; dbp->del(dbp, NULL, &key, 0)) &＃61;&＃61; 0)
        printf("db: %s: key was deleted./n", (char *)key.data);
    else
        dbp->err(dbp, ret, "DB->del");
    //.........close, only when the db successful closed,the data can real write to the disk.
    //if ((t_ret &＃61; dbp->close(dbp, 0)) !&＃61; 0 && ret &＃61;&＃61; 0)
    //ret &＃61; t_ret;
    //exit(ret);
    if (dbp !&＃61; NULL)
        dbp->close(dbp, 0);
    //.........close evn
    //........When you are done with an environment, you must close it.
    //........Before you close an environment, make sure you close any opened databases
    if (myEnv !&＃61; NULL)
        myEnv->close(myEnv, 0);
     return 0;
}