2019-2020 20175207- 20175235 实验三 实时系统
20175207-20175235 实验三 实时系统
20175207冷南
20175235泽仁拉措
目录:
任务详情
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
上方提交代码
附件提交测试截图，至少要测试附件中的两个文件
- 实验代码:
- 服务器端
#include <stdio.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <string.h> #define MYPORT 175235 void main(){ int serverfd, clientfd; struct sockaddr_in my_addr; struct sockaddr_in remote_addr; char buffer[BUFSIZ]; memset(&my_addr, 0, sizeof(my_addr)); my_addr.sin_family=AF_INET; my_addr.sin_addr.s_addr=INADDR_ANY; my_addr.sin_port=htons(MYPORT); if((serverfd=socket(PF_INET, SOCK_STREAM, 0))==-1){ perror("socket"); } if(bind(serverfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr))<0){ perror("bind"); } listen(serverfd, 5); int addrlen=sizeof(struct sockaddr_in); while(1){ if((clientfd=accept(serverfd, (struct sockaddr *)&remote_addr, &addrlen))<0){ perror("accept"); } printf("accept client %s\n", inet_ntoa(remote_addr.sin_addr)); int len, i; long wordscount=0; int flag=1; while(1){ if((len=recv(clientfd, buffer, 1024, 0))>0){ for(i=0; i<len; i++){ if(flag==0){ switch(buffer[i]){ case ' ': wordscount++; break; case '\n': wordscount++; break; case '\r': wordscount++; break; default: break; } } if(buffer[i]== ' ' || buffer[i]=='\n' || buffer[i]=='\r') flag=1; else flag=0; } } if(len<1024) break; } send(clientfd, &wordscount, sizeof(long), 0); close(clientfd); } close(serverfd);
}
* 客户端
```
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#define MYPORT 175235
void main(){
int clientfd;
struct sockaddr_in remote_addr;
char buffer[BUFSIZ];
memset(&remote_addr, 0 , sizeof(remote_addr));
remote_addr.sin_family=AF_INET;
remote_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
remote_addr.sin_port=htons(MYPORT);
if((clientfd=socket(PF_INET,SOCK_STREAM,0))<0){
perror("socket");
}
if(connect(clientfd, (struct sockaddr *)&remote_addr, sizeof(struct sockaddr))<0){
perror("connect");
}
int len;
FILE *fp;
char path[20];
gets(path);
fp=fopen(path, "r");
char readch;
int i=0;
while((readch=fgetc(fp))!=EOF){
if(i<1024){
buffer[i]=readch;
i++;
}
else{
i=0;
int n=send(clientfd, buffer, 1024, 0);
}
}
fclose(fp);
if(i!=0)
send(clientfd, buffer, i, 0);
long wordscount;
recv(clientfd, &wordscount, sizeof(long), 0);
printf("%ld\n", wordscount);
close(clientfd);
}
任务详情
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
上方提交代码
下方提交测试
对比单线程版
实验代码：
- 服务器端
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <pthread.h>
#define MYPORT 175235
pthread_mutex_t counter_mutex = PTHREAD_MUTEX_INITIALIZER;
int serverfd, clientfd;
char buffer[BUFSIZ];
void *wc(void *m){
pthread_mutex_lock( &counter_mutex );
int len, i;
long wordscount=0;
int flag=1;
while(1){
if((len=recv(clientfd, buffer, 1024, 0))>0){
for(i=0; i<len; i++){
if(flag==0){
switch(buffer[i]){
case ' ':
wordscount++;
break;
case '\n':
wordscount++;
break;
case '\r':
wordscount++;
break;
default:
break;
}
}
if(buffer[i]== ' ' || buffer[i]=='\n' || buffer[i]=='\r')
flag=1;
else
flag=0;
}
}
if(len<1024)
break;
}
send(clientfd, &wordscount, sizeof(long), 0);
close(clientfd);
pthread_mutex_unlock( &counter_mutex );
return NULL;
}
void main(){
pthread_t t;
char arg[30];
struct sockaddr_in my_addr;
struct sockaddr_in remote_addr;
memset(&my_addr, 0, sizeof(my_addr));
my_addr.sin_family=AF_INET;
my_addr.sin_addr.s_addr=INADDR_ANY;
my_addr.sin_port=htons(MYPORT);
if((serverfd=socket(PF_INET, SOCK_STREAM, 0))==-1){
perror("socket");
}
if(bind(serverfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr))<0){
perror("bind");
}
listen(serverfd, 5);
int addrlen=sizeof(struct sockaddr_in);
while(1){
if((clientfd=accept(serverfd, (struct sockaddr *)&remote_addr, &addrlen))<0){
perror("accept");
}
printf("accept client %s\n", inet_ntoa(remote_addr.sin_addr));
pthread_create(&t, NULL, &wc, NULL);
pthread_join(&t, NULL);
}
close(serverfd);
}
- 客户端
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#define MYPORT 175235
void main(){
int clientfd;
struct sockaddr_in remote_addr;
char buffer[BUFSIZ];
memset(&remote_addr, 0 , sizeof(remote_addr));
remote_addr.sin_family=AF_INET;
remote_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
remote_addr.sin_port=htons(MYPORT);
if((clientfd=socket(PF_INET,SOCK_STREAM,0))<0){
perror("socket");
}
if(connect(clientfd, (struct sockaddr *)&remote_addr, sizeof(struct sockaddr))<0){
perror("connect");
}
int len;
FILE *fp;
char path[20];
gets(path);
fp=fopen(path, "r");
char readch;
int i=0;
while((readch=fgetc(fp))!=EOF){
if(i<1024){
buffer[i]=readch;
i++;
}
else{
i=0;
int n=send(clientfd, buffer, 1024, 0);
}
}
fclose(fp);
if(i!=0)
send(clientfd, buffer, i, 0);
long wordscount;
recv(clientfd, &wordscount, sizeof(long), 0);
printf("%ld\n", wordscount);
close(clientfd);
}
