学习Unix 1 时间/日期服务器和客户端程序

来源：互联网发布：明星天价片酬知乎编辑：程序博客网时间：2024/06/16 03:43

根据Uuix学习的第一个服务器和客户端程序

时间/日期服务器程序：

#include <time.h>#include <sys/socket.h>#include <sys/types.h>#include <stdio.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <string.h>#define BUFFER_SIZE 1024#define LISTENQ     1024typedef struct sockaddr SA;int main(int argc, char **argv){    int listenfd, connfd;    struct sockaddr_in servaddr;    char buff[BUFFER_SIZE];    time_t ticks;    listenfd = socket(AF_INET, SOCK_STREAM, 0);    if (listenfd < 0)    {        printf("socket error");        return;    }    memset(&servaddr, 0, sizeof(servaddr));    servaddr.sin_family = AF_INET;    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);    servaddr.sin_port = htons(13);    if (bind(listenfd, (SA *)&servaddr, sizeof(servaddr)) < 0)    {        printf("bind error");        return;    }    if (listen(listenfd, LISTENQ) < 0)    {        printf("listenfd error");        return;    }        for ( ; ; )    {        if ((connfd = accept(listenfd, (SA *)NULL, NULL)) < 0)        {            printf("accept error");            return;        }        ticks = time(NULL);        snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));        if ((write(connfd, buff, strlen(buff)) != strlen(buff))        {            printf("write error");            return;        }                if (close(connfd) == -1)        {            printf("close error");            return;        }    }}

时间/日期客户端程序：

#include <stdio.h>#include <stdlib.h>#include <sys/socket.h>#include <sys/types.h>#include <netinet/in.h>#include <arpa/inet.h>#include <string.h>#define BUFFER_SIZE 1024typedef struct sockaddr SA;int main(int argc, char **argv){    int sockfd, n;    char recvline[BUFFER_SIZE + 1];    struct sockaddr_in servaddr;    if (argc != 2)    {        printf("usage: a.out < IP addrress>\r\n");        exit(1);    }    if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)    {        printf("socket error\n");        exit(1);    }    memset(&servaddr, 0, sizeof(servaddr));    servaddr.sin_family = AF_INET;    servaddr.sin_port = htons(13);    if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)    {        printf("inet_pton error %s", argv[1]);        exit(1);    }    if (connect(sockfd, (SA *)&servaddr, sizeof(servaddr)) < 0 )    {        printf("connect error");        exit(1);    }    while ((n = read(sockfd, recvline, BUFFER_SIZE)) > 0)    {        recvline[n] = 0;        printf("recived: %s", recvline);    }    if (n < 0)    {        printf("read error");        exit(1);    }}

打开一个终端之后运行服务器程序（必须是超级用户），再打开一个终端运行客户端程序（./a 127.0.0.1）

max@max:~/work/unix/unpv13e/max$ ./a 127.0.0.1
recived: Thu Feb 20 15:27:25 2014

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