标签:客户端 联系 roc failure eof 端口 void 输出 文件的
使用man wc命令查看wc命令的基本用法:
可知wc命令的功能为:统计指定文件中的字节数、字数、行数等,并将统计结果显示输出。常用的参数为:
但是,如果我们想统计某文件中出现过某个特定单词的行数,只用wc命令是无法完成的。我们可以借助管道将wc命令与其他命令(如grep)串联起来:
grep and test.txt | wc -l
上面命令实现了查找test.txt中所有出现过“and”这个单词的行,并统计行数。
进一步,如果想精确到个数,可以加上参数-o选项(only),表示只选中那些匹配的地方,结果为:
基于以上分析,代码如下:
#include <stdio.h> #include <stdlib.h> #include <unistd.h> void wc_func(char *file,int ism,int isw,int isl); int main(int argc ,char *argv[]) { int ism,isw,isl,opt; ism = isw = isl = 0; int count = 0; while((opt=getopt(argc,argv,"mwl"))!=-1) { count++; switch(opt) { case ‘m‘: ism=1; break; case ‘w‘: isw=1; break; case ‘l‘: isl=1; break; case ‘?‘: printf("请查看该指令说明文档 %c\n",optopt); exit(0); } } if(count==0) { ism=isw=isl=1; } if(optind==argc) { printf("wc error: have no file!\n"); } for(;optind<argc;optind++) { wc_func(argv[optind],ism,isw,isl); } } void wc_func(char *file,int ism,int isw,int isl) { int t,m,w,l; int state = 0; FILE *in; if((in = fopen(file,"r"))==NULL) { printf("wc %s:no this file or dir\n",file); return; } w=m=l=0; while((t=fgetc(in))!=EOF) { /*if(t==‘\t‘||t==‘ ‘) { w++; } else if(t==‘\n‘) { l++; }*/ if(t == ‘\n‘) { l++; state = 0; continue; } else if(t == ‘ ‘) { state = 0; continue; } else if(t == ‘\r‘) { state = 0; continue; } else { if(state == 0) { state = 1; w++; } continue; } m++; } if(isl) printf("%-5d",l); if(isw) printf("%-5d",w); if(ism) printf("%-5d",m); printf("%-10s\n",file); }
运行结果如下:
虽然在网络安全编程基础课程上学习过网络编程的相关知识,但基于的是Windows。将其移植到Linux下时需要注意以下几个方面:
...... 以上是在移植过程中遇到的问题,需格外注意。
基于客户端与服务器的通信流程,可分别写出创建服务器和客户端,以及客户端和服务器连接的代码:
/*创建服务器:*/ #include <netinet/in.h> // for sockaddr_in #include <sys/types.h> // for socket #include <sys/socket.h> // for socket #include <stdio.h> // for printf #include <stdlib.h> // for exit #include <string.h> // for bzero #include <unistd.h> /* #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> */ #define HELLO_WORLD_SERVER_PORT 5212 #define LENGTH_OF_LISTEN_QUEUE 20 #define BUFFER_SIZE 1024 #define FILE_NAME_MAX_SIZE 512 #define FILE_WORDS_NUMBER 32 int wc_func(char *file_name); int main(int argc, char **argv) { //设置一个socket地址结构server_addr,代表服务器internet地址, 端口 struct sockaddr_in server_addr; bzero(&server_addr,sizeof(server_addr)); //把一段内存区的内容全部设置为0 server_addr.sin_family = AF_INET; server_addr.sin_addr.s_addr = htons(INADDR_ANY); server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); //创建用于internet的流协议(TCP)socket,用server_socket代表服务器socket int server_socket = socket(PF_INET,SOCK_STREAM,0); if( server_socket < 0) { printf("Create Socket Failed!"); exit(1); } //把socket和socket地址结构联系起来 if( bind(server_socket,(struct sockaddr*)&server_addr,sizeof(server_addr))) { printf("Server Bind Port : %d Failed!", HELLO_WORLD_SERVER_PORT); exit(1); } //server_socket用于监听 if ( listen(server_socket, LENGTH_OF_LISTEN_QUEUE) ) { printf("Server Listen Failed!"); exit(1); } while (1) //服务器端要一直运行 { //定义客户端的socket地址结构client_addr struct sockaddr_in client_addr; socklen_t length = sizeof(client_addr); //接受一个到server_socket代表的socket的一个连接 //如果没有连接请求,就等待到有连接请求--这是accept函数的特性 //accept函数返回一个新的socket,这个socket(new_server_socket)用于同连接到的客户的通信 //new_server_socket代表了服务器和客户端之间的一个通信通道 //accept函数把连接到的客户端信息填写到客户端的socket地址结构client_addr中 int new_server_socket = accept(server_socket,(struct sockaddr*)&client_addr,&length); if ( new_server_socket < 0) { printf("Server Accept Failed!\n"); break; } char file_name[FILE_NAME_MAX_SIZE+1]; bzero(file_name, FILE_NAME_MAX_SIZE+1); char buffer[BUFFER_SIZE]; bzero(buffer,BUFFER_SIZE); recv(new_server_socket,file_name,BUFFER_SIZE,0); FILE * fp = fopen(file_name,"w"); if(NULL == fp ) { printf("File:\t%s Can Not Open To Write\n", file_name); exit(1); } //从客户端接收数据到buffer中 bzero(buffer,BUFFER_SIZE); int len = 0; while( len = recv(new_server_socket,buffer,BUFFER_SIZE,0)) { if(len < 0) { printf("Recieve Data From Client %s Failed!\n", argv[1]); break; } int write_length = fwrite(buffer,sizeof(char),len,fp); if (write_length<len) { printf("File:\t%s Write Failed\n", file_name); break; } bzero(buffer,BUFFER_SIZE); } printf("File:\t%s Transfer Finished!\n",file_name); fclose(fp); //关闭与客户端的连接 close(new_server_socket); } //关闭监听用的socket close(server_socket); return 0; }
/*客户端:*/ #include <netinet/in.h> // for sockaddr_in #include <sys/types.h> // for socket #include <sys/socket.h> // for socket #include <stdio.h> // for printf #include <stdlib.h> // for exit #include <string.h> // for bzero #include <unistd.h> /* #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> */ #define HELLO_WORLD_SERVER_PORT 5212 #define BUFFER_SIZE 1024 #define FILE_NAME_MAX_SIZE 512 #define FILE_WORDS_NUMBER 32 int main(int argc, char **argv) { if (argc != 2) { printf("Usage: ./%s ServerIPAddress\n",argv[0]); exit(1); } //设置一个socket地址结构client_addr,代表客户机internet地址, 端口 struct sockaddr_in client_addr; bzero(&client_addr,sizeof(client_addr)); //把一段内存区的内容全部设置为0 client_addr.sin_family = AF_INET; //internet协议族 client_addr.sin_addr.s_addr = htons(INADDR_ANY);//INADDR_ANY表示自动获取本机地址 client_addr.sin_port = htons(0); //0表示让系统自动分配一个空闲端口 //创建用于internet的流协议(TCP)socket,用client_socket代表客户机socket int client_socket = socket(AF_INET,SOCK_STREAM,0); if( client_socket < 0) { printf("Create Socket Failed!\n"); exit(1); } //把客户机的socket和客户机的socket地址结构联系起来 if( bind(client_socket,(struct sockaddr*)&client_addr,sizeof(client_addr))) { printf("Client Bind Port Failed!\n"); exit(1); } //设置一个socket地址结构server_addr,代表服务器的internet地址, 端口 struct sockaddr_in server_addr; bzero(&server_addr,sizeof(server_addr)); server_addr.sin_family = AF_INET; if(inet_aton(argv[1],&server_addr.sin_addr) == 0) //服务器的IP地址来自程序的参数 { printf("Server IP Address Error!\n"); exit(1); } server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); socklen_t server_addr_length = sizeof(server_addr); //向服务器发起连接,连接成功后client_socket代表了客户机和服务器的一个socket连接 if(connect(client_socket,(struct sockaddr*)&server_addr, server_addr_length) < 0) { printf("Can Not Connect To %s!\n",argv[1]); exit(1); } char file_name[FILE_NAME_MAX_SIZE+1]; bzero(file_name, FILE_NAME_MAX_SIZE+1); printf("Please Input File Name On Server:\t"); scanf("%s", file_name); char buffer[BUFFER_SIZE]; bzero(buffer,BUFFER_SIZE); strncpy(buffer, file_name, strlen(file_name)>BUFFER_SIZE?BUFFER_SIZE:strlen(file_name)); //向服务器发送buffer中的数据 send(client_socket,buffer,BUFFER_SIZE,0); FILE * fp = fopen(file_name,"r"); if(NULL == fp ) { printf("File:\t%s Not Found\n", file_name); exit(1); } else { bzero(buffer, BUFFER_SIZE); int file_block_length = 0; while( (file_block_length = fread(buffer,sizeof(char),BUFFER_SIZE, fp))>0) { //printf("file_block_length = %d\n",file_block_length); //发送buffer中的字符串到服务器 if(send(client_socket,buffer,file_block_length,0)<0) { printf("Send File:\t%s Failed\n", file_name); break; } bzero(buffer, BUFFER_SIZE); } } printf("Send File:\t %s To Server[%s] Finished\n",file_name, argv[1]); printf("The File has %d words.\n", wc_func(file_name)); fclose(fp); //关闭socket close(client_socket); return 0; } int wc_func(char *file_name) { int t; int w = 0; int state = 0; FILE *in; if((in = fopen(file_name,"r"))==NULL) { printf("wc %s:no this file or dir\n",file_name); return; } while((t=fgetc(in))!=EOF) { if(t==‘\n‘||t==‘ ‘||t==‘\r‘) { state = 0; continue; } else { if(state == 0) { state = 1; w++; } continue; } } return w; }
运行结果:
查看与创建进程相关的函数:
“pthreadcreate()”函数,使用man 3 pthreadcreate命令查看其用法
意思是:系统调用里没有“pthread”函数,再编译使用进程的.C文件时要在 后面加上-pthread
函数说明:
这部分的代码如下:
while(1){ //接受客户端连接 socklent addrlen = sizeof(struct sockaddr); struct sockaddrin clientaddr; //客户端地址结构 int clientsock = accept(ss, (struct sockaddr*)&clientaddr, &addrlen); if(clientsock < 0){ printf("accept error\n"); } printf("accept success\n"); pthread_t pid; if(pthread_create(&pid, NULL, process_client, &client_sock) < 0){ printf("pthread_create error\n"); } }
创建了新的线程,接下来就可以传送文件了。
代码如下:
/*服务器*/ #include<netinet/in.h> #include<sys/types.h> #include<sys/socket.h> #include<stdio.h> #include<stdlib.h> #include<string.h> #include<pthread.h> /* #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> */ #define HELLO_WORLD_SERVER_PORT 165212 #define LENGTH_OF_LISTEN_QUEUE 20 #define BUFFER_SIZE 1024 #define FILE_NAME_MAX_SIZE 512 void *process_client(void *new_server_socket); int mywc(char file_name[]) { char ch; int flag=0,num=0; int choose; FILE *fp; printf("统计单词个数还是实现“wc -w”?(1or2)\n"); scanf("%d",&choose); if((fp = fopen(file_name,"r"))==NULL) { printf("Failure to open %s\n",file_name); exit(0); } if(choose==1) { while((ch=fgetc(fp))!=EOF) { if(ch==‘ ‘ || ch==‘\n‘ || ch==‘\t‘ || ch==‘\!‘ || ch==‘\?‘ || ch==‘\"‘ || ch==‘\.‘ || ch== ‘\,‘ || ch==‘\:‘ || ch==‘\(‘ || ch==‘\)‘ || ch==‘\;‘ || ch==‘\-‘) { flag=0; } else { if(flag==0) { flag=1; num++; } } } } else if(choose==2) { while((ch=fgetc(fp))!=EOF) { if(ch==‘ ‘ || ch==‘\n‘ || ch==‘\t‘ || ch==‘\r‘) flag=0; else { if(flag==0) { flag=1; num++; } } } } printf("单词个数为:%d\n",num); fclose(fp); return num; } int main(int argc, char **argv) { // set socket‘s address information // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口 struct sockaddr_in server_addr; bzero(&server_addr, sizeof(server_addr)); server_addr.sin_family = AF_INET; server_addr.sin_addr.s_addr = htons(INADDR_ANY); server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); // create a stream socket // 创建用于internet的流协议(TCP)socket,用server_socket代表服务器向客户端提供服务的接口 int server_socket = socket(PF_INET, SOCK_STREAM, 0); if (server_socket < 0) { printf("Create Socket Failed!\n"); exit(1); } // 把socket和socket地址结构绑定 if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr))) { printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT); exit(1); } // server_socket用于监听 if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE)) { printf("Server Listen Failed!\n"); exit(1); } // 服务器端一直运行用以持续为客户端提供服务 while(1) { // 定义客户端的socket地址结构client_addr,当收到来自客户端的请求后,调用accept // 接受此请求,同时将client端的地址和端口等信息写入client_addr中 struct sockaddr_in client_addr; socklen_t length = sizeof(client_addr); // 接受一个从client端到达server端的连接请求,将客户端的信息保存在client_addr中 // 如果没有连接请求,则一直等待直到有连接请求为止,这是accept函数的特性,可以 // 用select()来实现超时检测 // accpet返回一个新的socket,这个socket用来与此次连接到server的client进行通信 // 这里的new_server_socket代表了这个通信通道 int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length); printf("连接到客户端\n"); if (new_server_socket < 0) { printf("Server Accept Failed!\n"); } //添加进程相关代码 pthread_t pid; if(pthread_create(&pid, NULL, process_client,(void *) &new_server_socket) < 0){ printf("pthread_create error\n"); } } // close(server_socket); } void *process_client(void *new_server_socket) { int sockid=*(int *)new_server_socket; FILE *fp; //接受来自客户端的文件 char buffer[BUFFER_SIZE]; char file_name[FILE_NAME_MAX_SIZE]; bzero(buffer, sizeof(buffer)); int length=0; if(recv(sockid,buffer,BUFFER_SIZE, 0)==-1) { printf("接受文件名%s失败\n",buffer); } strcpy(file_name,buffer); strcat(file_name,"-server"); if((fp = fopen(file_name,"w"))==NULL) { printf("Failure to open %s\n",file_name); exit(0); } while( length = recv(sockid, buffer, BUFFER_SIZE, 0)) { if(length<0) { printf("接受文件出错\n"); exit(0); } if(fwrite(buffer,sizeof(char),length,fp)<length) { printf("写文件失败\n"); } bzero(buffer, BUFFER_SIZE); } fclose(fp); printf("接受文件完毕\n"); int number=0; number=mywc(file_name); bzero(buffer, BUFFER_SIZE); buffer[0]=number+48; // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端 /*if (send(new_server_socket, buffer, sizeof(buffer), 0) < 0) { printf("Send number Failed!\n"); } printf("发送单词个数完毕\n");*/ bzero(buffer, sizeof(buffer)); // fclose(fp); printf("File Transfer Finished!\n"); close(new_server_socket); }
/*客户端*/
include<netinet/in.h> // for sockaddr_in include<sys/types.h> // for socket include<sys/socket.h> // for socket include<stdio.h> // for printf include<stdlib.h> // for exit include<string.h> // for bzero /* include <sys/types.h> include <sys/stat.h> include <fcntl.h> include <unistd.h> */ define HELLOWORLDSERVER_PORT 165212 define BUFFER_SIZE 1024 define FILENAMEMAX_SIZE 512 int mywc(char file_name[],int choose); int main(int argc, char **argv) { FILE *fp; if (argc != 2) { printf("Usage: ./%s ServerIPAddress\n", argv[0]); exit(1); } // 设置一个socket地址结构clientaddr, 代表客户机的internet地址和端口 struct sockaddrin clientaddr; bzero(&clientaddr, sizeof(clientaddr)); clientaddr.sinfamily = AFINET; // internet协议族 client_addr.sinaddr.saddr = htons(INADDRANY); // INADDRANY表示自动获取本机地址 clientaddr.sinport = htons(0); // auto allocated, 让系统自动分配一个空闲端口 // 创建用于internet的流协议(TCP)类型socket,用clientsocket代表客户端socket int clientsocket = socket(AF_INET, SOCKSTREAM, 0); if (clientsocket < 0) { printf("Create Socket Failed!\n"); exit(1); } // 把客户端的socket和客户端的socket地址结构绑定 if (bind(clientsocket, (struct sockaddr*)&clientaddr, sizeof(client_addr))) { printf("Client Bind Port Failed!\n"); exit(1); } // 设置一个socket地址结构serveraddr,代表服务器的internet地址和端口 struct sockaddrin serveraddr; bzero(&serveraddr, sizeof(serveraddr)); serveraddr.sinfamily = AFINET; // 服务器的IP地址来自程序的参数 if (inetaton(argv[1], &serveraddr.sinaddr) == 0) { printf("Server IP Address Error!\n"); exit(1); } serveraddr.sinport = htons(HELLOWORLDSERVERPORT); socklen_t serveraddrlength = sizeof(serveraddr); // 向服务器发起连接请求,连接成功后clientsocket代表客户端和服务器端的一个socket连接 if (connect(clientsocket, (struct sockaddr*)&serveraddr, serveraddrlength) < 0) { printf("Can Not Connect To %s!\n", argv[1]); exit(1); } char file_name[FILE_NAME_MAX_SIZE + 1]; bzero(file_name, sizeof(file_name)); printf("Please Input File Name.\t"); scanf("%s", file_name); if((fp = fopen(file_name,"r"))==NULL) { printf("Failure to open %s\n",file_name); exit(0); } char buffer[BUFFER_SIZE]; bzero(buffer, sizeof(buffer)); strcpy(buffer,file_name); if(send(client_socket,buffer,BUFFER_SIZE,0)==-1) { printf("发送文件名失败\n"); } char ch; int i=0; while((ch=fgetc(fp))!=EOF) { buffer[i++]=ch; if(i>=BUFFER_SIZE) { if((send(client_socket, buffer, BUFFER_SIZE, 0))==-1) { printf("发送文件失败\n"); } bzero(buffer, sizeof(buffer)); i=0; } } if(i<BUFFER_SIZE) { if((send(client_socket, buffer, i, 0))==-1) { printf("发送文件失败\n"); } } printf("发送%s完毕\n",file_name); mywc(file_name,1); mywc(file_name,2); // 向服务器发送buffer中的数据,此时buffer中存放的是客户端需要接收的文件 //以下接收服务器发来的单词个数 bzero(buffer, sizeof(buffer)); // int length = 0; /* int length = recv(client_socket, buffer, sizeof(buffer), 0); if (length < 0) { printf("Recieve Data From Server %s Failed!\n", argv[1]); } else { printf("Recieve words number %c From Server[%s] Finished!\n",buffer[0],argv[1]); } bzero(buffer, BUFFER_SIZE); */ // 传输完毕,关闭socket fclose(fp); close(client_socket); return 0; } int mywc(char file_name[],int choose) { FILE *fp; char ch; int flag=0,num=0; // int choose; // printf("统计单词个数还是实现“wc -w”?(1or2)\n"); // scanf("%d",&choose); if((fp = fopen(filename,"r"))==NULL) { printf("Failure to open %s\n",filename); exit(0); } if(choose==1) { while((ch=fgetc(fp))!=EOF) { if(ch==‘ ‘ || ch==‘\n‘ || ch==‘\t‘ || ch==‘\!‘ || ch==‘\?‘ || ch==‘\"‘ || ch==‘\.‘ || ch== ‘\,‘ || ch==‘\:‘ || ch==‘\(‘ || ch==‘\)‘ || ch==‘\;‘ || ch==‘\-‘) { flag=0; } else { if(flag==0) { flag=1; num++; } } } } else if(choose==2) { while((ch=fgetc(fp))!=EOF) { if(ch==‘ ‘ || ch==‘\n‘ || ch==‘\t‘ || ch==‘\r‘) flag=0; else { if(flag==0) { flag=1; num++; } } } } printf("单词个数为:%d_用方式%d计算\n",num,choose); fclose(fp); return num; }
运行结果如下:
本次实验模拟wc命令统计文本文件中的单词数、实现linux下的文本传输,虽然最终已经实现了多线程的传输为每个用户提供了单独的平台,但仅仅做到这里(一台主机上自己和自己通信)完全没有价值,因此我们应该继续学习改善程序使其能在多台主机上运行完成真正的用户互动
有一个问题:本学期开始的时候我选择期末考试(平时分占10%),老师第11周上课时突然说全部都变成期末考试,平时分占40%,因此10周之前的课堂测试,课下测试、每周博客没有做,我的平时成绩会因此低于选择平时考试的同学,希望老师可以提供公平合理的方案解决这一问题
2018-2019-1 20165212 实验三-并发程序设计
标签:客户端 联系 roc failure eof 端口 void 输出 文件的
原文地址:https://www.cnblogs.com/FenixRen/p/9977726.html