安装过程： (环境： 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： 1、如果以gcc和g++编译的话,须执行#env CC=gcc CCC=g++ ../dist/configure，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=/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)： #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：http://www.oracle.com/technology/documentation/berkeley-db/db/ref/build_unix/solaris.html BerkeleyDB参考资料：http://www.oracle.com/technology/documentation/berkeley-db/db/ref/toc.html 可使用如下程序测试_______________ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> #include <string.h> //only this head should include for use bdb. #include <db.h> #define DATABASE "free.db" #define DBLOCAT "/home/free/code/cc++/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 = db_env_create(&myEnv, 0); if (ret != 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 = DB_CREATE | DB_INIT_MPOOL; //........Open the environment. ret = myEnv->open(myEnv,DBLOCAT,env_flags,0); if (ret != 0) { fprintf(stderr, "Environment open failed: %s", db_strerror(ret)); return -1; } if ((ret = db_create(&dbp, myEnv, 0)) != 0) { fprintf(stderr, "db_create: %s/n", db_strerror(ret)); exit (1); } if ((ret = dbp->open(dbp, NULL, DATABASE, NULL, DB_BTREE, DB_CREATE, 0664)) != 0) { dbp->err(dbp, ret, "%s", DATABASE); exit (1); } memset(&key, 0, sizeof(key)); memset(&data, 0, sizeof(data)); key.data = "sport"; key.size = sizeof("sport"); data.data = "football"; data.size = sizeof("football"); /* //......put data if ((ret = dbp->put(dbp, NULL, &key, &data, 0)) == 0) { printf("db: %s: key stored./n", (char *)key.data); } else { dbp->err(dbp, ret, "DB->put"); } */ //........put data NOOVERWRITE if ((ret = dbp->put(dbp, NULL, &key, &data, DB_NOOVERWRITE)) == 0) printf("db: %s: key stored./n", (char *)key.data); else dbp->err(dbp, ret, "DB->put"); //.......get data if ((ret = dbp->get(dbp, NULL, &key, &data, 0)) == 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 = dbp->del(dbp, NULL, &key, 0)) == 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 = dbp->close(dbp, 0)) != 0 && ret == 0) //ret = t_ret; //exit(ret); if (dbp != 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 != NULL) myEnv->close(myEnv, 0); return 0; }
