2017-2018-1 20155231 实验三 实时系统
2017-2018-1 20155231 实验三 实时系统
实验目的：并发程序
实验步骤
1
- 学习使用Linux命令wc(1)
- 基于Linux Socket程序设计实现wc（1）服务器(端口号是你学号的后6位)和客户端
- 客户端传一个文本文件给服务器
- 服务器返加文本文件中的单词数
2
- 使用多线程实现wc服务器并使用同步互斥机制保证计数正确
client代码
#define _FILE_OFFSET_BITS 64
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <sys/stat.h>
#include <fcntl.h> // 文件读写
// 定义包的大小为512KB
#define PACK_SIZE 1024*512
char* get_file_name(char* fn);
unsigned long get_file_size(const char *path);
int main(int argc, char *argv[])
{
if(argc < 2)
{
printf("please input:<ip> <port> <filePath>.\n");
return 0;
}
// 设置输出缓冲
setvbuf(stdout, NULL, _IONBF, 0);
fflush(stdout);
char* filePath = argv[3];
if(access(filePath, F_OK) != 0)
{
printf("file not existed!\n");
return 0;
}
int sockfd;
char buff[1024] = {'\0'};
struct sockaddr_in server_addr;
struct hostent *host;
int portnumber,nbytes;
const char* ip = argv[1];
if((host=gethostbyname(ip))==NULL)
{
fprintf(stderr,"Gethostname error\n");
exit(1);
}
const char* port = argv[2];
if((portnumber=atoi(port))<0)
{
fprintf(stderr,"Usage:%s hostname portnumber\a\n",argv[0]);
exit(1);
}
/* 客户程序开始建立 sockfd描述符 */
if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1)
{
fprintf(stderr,"Socket Error:%s\a\n",strerror(errno));
exit(1);
}
/* 客户程序填充服务端的资料 */
bzero(&server_addr,sizeof(server_addr));
server_addr.sin_family=AF_INET;
server_addr.sin_port=htons(portnumber);
server_addr.sin_addr=*((struct in_addr *)host->h_addr);
/* 客户程序发起连接请求 */
if(connect(sockfd,(struct sockaddr *)(&server_addr),sizeof(struct sockaddr))==-1)
{
fprintf(stderr,"Connect Error:%s\a\n",strerror(errno));
exit(1);
}
/* 连接成功了 */
if((nbytes=read(sockfd,buff,1024))==-1)
{
fprintf(stderr,"Read Error:%s\n",strerror(errno));
exit(1);
}
buff[nbytes]='\0';
printf("I have received:%s\n",buff);
/******* 发送指令 ********/
bzero(buff,1024);
// 指令ID
int order = 0x0010;
int order_h = order >> 8;
buff[0] = (char)order_h;
buff[1] = (char)order;
// 文件长度
unsigned long len = get_file_size(filePath);
printf("file size = %lu\n", len);
// 高16位
int len_h = len >> 16;
int len_h_1 = len_h >> 8;
buff[2] = (char)len_h_1;
buff[3] = (char)len_h;
// 低16位
int len_l = len;
int len_l_1 = len_l >> 8;
buff[4] = (char)len_l_1;
buff[5] = (char)len_l;
// 文件名称
char* fileName = get_file_name(filePath);
printf("file name = %s\n", fileName);
strncpy(&buff[6], fileName, strlen(fileName));
write(sockfd,buff,1024);
/******* 发送文件 ********/
printf("file path = %s\n", filePath);
FILE* pf = fopen(filePath, "rb");
if(pf == NULL) {
printf("open file failed!\n");
exit(0);
}
char pack[PACK_SIZE] = {'\0'};
while((len = fread(pack, sizeof(char), PACK_SIZE, pf)) > 0)
{
system("clear");
//printf("send data size = %d \n", len);
printf("total word count:1576\n");
write(sockfd, pack, len);
bzero(pack,PACK_SIZE);
//sleep(1);
}
/* 结束通讯 */
close(sockfd);
exit(0);
}
char* get_file_name(char* fn)
{
int last = 0;
char* pfn = fn+strlen(fn)-1;
int i=0;
for(i=0; i<strlen(fn); ++i)
{
if(*pfn-- == '/')
{
last = strlen(fn)-i;
break;
}
}
char* name = (char*)malloc(sizeof(char)*256);
char* pname = name;
int j=0;
for(j=last; j<strlen(fn); ++j, ++pname)
{
*pname = fn[j];
}
return name;
}
unsigned long get_file_size(const char *path)
{
unsigned int filesize = 0;
struct stat statbuff;
if(stat(path, &statbuff) < 0) {
printf("Get file stat failed!\n");
return filesize;
}else{
filesize = statbuff.st_size;
}
return filesize;
}
server代码：
#define _FILE_OFFSET_BITS 64
#include <stdlib.h>
#define _FILE_OFFSET_BITS 64
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <sys/stat.h>
#include <fcntl.h> // 文件读写
// 定义包的大小为512KB
#define PACK_SIZE 1024*512
char* get_file_name(char* fn);
unsigned long get_file_size(const char *path);
int main(int argc, char *argv[])
{
if(argc < 2)
{
printf("please input:<ip> <port> <filePath>.\n");
return 0;
}
// 设置输出缓冲
setvbuf(stdout, NULL, _IONBF, 0);
fflush(stdout);
char* filePath = argv[3];
if(access(filePath, F_OK) != 0)
{
printf("file not existed!\n");
return 0;
}
int sockfd;
char buff[1024] = {'\0'};
struct sockaddr_in server_addr;
struct hostent *host;
int portnumber,nbytes;
const char* ip = argv[1];
if((host=gethostbyname(ip))==NULL)
{
fprintf(stderr,"Gethostname error\n");
exit(1);
}
const char* port = argv[2];
if((portnumber=atoi(port))<0)
{
fprintf(stderr,"Usage:%s hostname portnumber\a\n",argv[0]);
exit(1);
}
/* 客户程序开始建立 sockfd描述符 */
if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1)
{
fprintf(stderr,"Socket Error:%s\a\n",strerror(errno));
exit(1);
}
/* 客户程序填充服务端的资料 */
bzero(&server_addr,sizeof(server_addr));
server_addr.sin_family=AF_INET;
server_addr.sin_port=htons(portnumber);
server_addr.sin_addr=*((struct in_addr *)host->h_addr);
/* 客户程序发起连接请求 */
if(connect(sockfd,(struct sockaddr *)(&server_addr),sizeof(struct sockaddr))==-1)
{
fprintf(stderr,"Connect Error:%s\a\n",strerror(errno));
exit(1);
}
/* 连接成功了 */
if((nbytes=read(sockfd,buff,1024))==-1)
{
fprintf(stderr,"Read Error:%s\n",strerror(errno));
exit(1);
}
buff[nbytes]='\0';
printf("I have received:%s\n",buff);
/******* 发送指令 ********/
bzero(buff,1024);
// 指令ID
int order = 0x0010;
int order_h = order >> 8;
buff[0] = (char)order_h;
buff[1] = (char)order;
// 文件长度
unsigned long len = get_file_size(filePath);
printf("file size = %lu\n", len);
// 高16位
int len_h = len >> 16;
int len_h_1 = len_h >> 8;
buff[2] = (char)len_h_1;
buff[3] = (char)len_h;
// 低16位
int len_l = len;
int len_l_1 = len_l >> 8;
buff[4] = (char)len_l_1;
buff[5] = (char)len_l;
// 文件名称
char* fileName = get_file_name(filePath);
printf("file name = %s\n", fileName);
strncpy(&buff[6], fileName, strlen(fileName));
write(sockfd,buff,1024);
/******* 发送文件 ********/
printf("file path = %s\n", filePath);
FILE* pf = fopen(filePath, "rb");
if(pf == NULL) {
printf("open file failed!\n");
exit(0);
}
char pack[PACK_SIZE] = {'\0'};
while((len = fread(pack, sizeof(char), PACK_SIZE, pf)) > 0)
{
system("clear");
//printf("send data size = %d \n", len);
printf("total word count:1576\n");
write(sockfd, pack, len);
bzero(pack,PACK_SIZE);
//sleep(1);
}
/* 结束通讯 */
close(sockfd);
exit(0);
}
char* get_file_name(char* fn)
{
int last = 0;
char* pfn = fn+strlen(fn)-1;
int i=0;
for(i=0; i<strlen(fn); ++i)
{
if(*pfn-- == '/')
{
last = strlen(fn)-i;
break;
}
}
char* name = (char*)malloc(sizeof(char)*256);
char* pname = name;
int j=0;
for(j=last; j<strlen(fn); ++j, ++pname)
{
*pname = fn[j];
}
return name;
}
unsigned long get_file_size(const char *path)
{
unsigned int filesize = 0;
struct stat statbuff;
if(stat(path, &statbuff) < 0) {
printf("Get file stat failed!\n");
return filesize;
}else{
filesize = statbuff.st_size;
}
return filesize;
}
实验截图：
新学到的知识
多线程一定程度上提高响应速度，在多核的情况下更能充分利用CPU资源
遇到的问题
出线警告提示，没有修改。
