2018-2019-1 20165204 实验三 实时系统

任务一

• 学习使用Linux命令wc
• 基于Linux Socket程序设计实现wc
• 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

wc命令使用方法如下

通过man wc命令进行查询

程序实现截图如下

服务器

客户端

实验代码如下：

//服务器
#include<netinet/in.h> // sockaddr_in
#include<sys/types.h>  // socket
#include<sys/socket.h> // socket
#include<stdio.h>    // printf
#include<stdlib.h>   // exit
#include<string.h>   // bzero #define SERVER_PORT 165204
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512 int main(void)
{ 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(SERVER_PORT); int server_socket_fd = socket(PF_INET, SOCK_STREAM, 0); if(server_socket_fd < 0) { perror("Create Socket Failed:"); exit(1); } int opt = 1; setsockopt(server_socket_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); if(-1 == (bind(server_socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr)))) { perror("Server Bind Failed:"); exit(1); } if(-1 == (listen(server_socket_fd, LENGTH_OF_LISTEN_QUEUE))) { perror("Server Listen Failed:"); exit(1); } while(1) { struct sockaddr_in client_addr; socklen_t client_addr_length = sizeof(client_addr); int new_server_socket_fd = accept(server_socket_fd, (struct sockaddr*)&client_addr, &client_addr_length); if(new_server_socket_fd < 0) { perror("Server Accept Failed:"); break; } char buffer[BUFFER_SIZE]; bzero(buffer, BUFFER_SIZE); if(recv(new_server_socket_fd, buffer, BUFFER_SIZE, 0) < 0) { perror("Server Recieve Data Failed:"); break; } char file_name[FILE_NAME_MAX_SIZE+1]; bzero(file_name, FILE_NAME_MAX_SIZE+1); strncpy(file_name, buffer, strlen(buffer)>FILE_NAME_MAX_SIZE?FILE_NAME_MAX_SIZE:strlen(buffer)); printf("%s\n", file_name); FILE *fp = fopen(file_name, "r"); if(NULL == fp) { printf("File:%s Not Found\n", file_name); } else{ bzero(buffer, BUFFER_SIZE); int length = 0; while((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0) { if(send(new_server_socket_fd, buffer, length, 0) < 0) { printf("Send File:%s Failed./n", file_name); break; } bzero(buffer, BUFFER_SIZE); } fclose(fp); printf("File:%s Transfer Successful!\n", file_name); } close(new_server_socket_fd); } close(server_socket_fd); return 0;
}

//客户端
#include<netinet/in.h>  // sockaddr_in
#include<sys/types.h>  // socket
#include<sys/socket.h>  // socket
#include<stdio.h>    // printf
#include<stdlib.h>    // exit
#include<string.h>    // bzero #define SERVER_PORT 165204
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512 int main()
{ struct sockaddr_in client_addr; bzero(&client_addr, sizeof(client_addr)); client_addr.sin_family = AF_INET; client_addr.sin_addr.s_addr = htons(INADDR_ANY); client_addr.sin_port = htons(0); int client_socket_fd = socket(AF_INET, SOCK_STREAM, 0); if(client_socket_fd < 0) { perror("Create Socket Failed:"); exit(1); } if(-1 == (bind(client_socket_fd, (struct sockaddr*)&client_addr, sizeof(client_addr)))) { perror("Client Bind Failed:"); exit(1); } struct sockaddr_in server_addr; bzero(&server_addr, sizeof(server_addr)); server_addr.sin_family = AF_INET; if(inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) == 0) { perror("Server IP Address Error:"); exit(1); } server_addr.sin_port = htons(SERVER_PORT); socklen_t server_addr_length = sizeof(server_addr); if(connect(client_socket_fd, (struct sockaddr*)&server_addr, server_addr_length) < 0) { perror("Can Not Connect To Server IP:"); exit(0); } 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)); if(send(client_socket_fd, buffer, BUFFER_SIZE, 0) < 0) { perror("Send File Name Failed:"); exit(1); } FILE *fp = fopen(file_name, "w"); if(NULL == fp) { printf("File:\t%s Can Not Open To Write\n", file_name); exit(1); } bzero(buffer, BUFFER_SIZE); int length = 0; while((length = recv(client_socket_fd, buffer, BUFFER_SIZE, 0)) > 0) { if(fwrite(buffer, sizeof(char), length, fp) < length) { printf("File:\t%s Write Failed\n", file_name); break; } bzero(buffer, BUFFER_SIZE); }printf("Receive File:\t%s From Server IP Successful!\n", file_name); close(fp); close(client_socket_fd);char *argv[]={"wc","-w",file_name,0};execvp("wc",argv);return 0;
} 

任务二

• 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
  实现截图如下