ser.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <assert.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <pthread.h>
#include <fcntl.h>

#define  SER_PORT   6000
#define  SER_IP     "127.0.0.1"


int socket_create();
void* thread_fun(void * arg);
int main()
{
    int sockfd = socket_create();

    struct sockaddr_in caddr;
    while( 1 )
    {
        int len = sizeof(caddr);
        int c = accept(sockfd,(struct sockaddr*)&caddr,&len);
        if ( c < 0 )
        {
            continue;
        }

        printf("accept c = %d\n",c);

        pthread_t id;
        pthread_create(&id,NULL,thread_fun,(void*)c);
    }

}

void* thread_fun(void * arg)
{
    int c = (int)arg;
    while( 1 )
    {
        char buff[128] = {0};
        int n = recv(c,buff,127,0);//rm a.c 
        if ( n <= 0 )
        {
            break;
        }

        //strtok_t  -> rm, a.c -> myargv[],
        //1) get -> send_file()
        //2) put -> recv_file()
        //3) rm, cp , ls -> 创建管道 fork
        // parent -> read(pipefd[0]);
        // child -> dup2(pipefd[1],1)
        //          dup2(pipefd[2],2)
        //exec(ls);
        //exit()
        printf("buff=%s\n",buff);
        send(c,"ok",2,0);

    }

    close(c);
    printf("one client over\n");

}

int socket_create()
{
    int sockfd = socket(AF_INET,SOCK_STREAM,0);
    if ( sockfd == -1 )
    {
        return -1;
    }

    struct sockaddr_in saddr;
    memset(&saddr,0,sizeof(saddr));
    saddr.sin_family = AF_INET;
    saddr.sin_port = htons(SER_PORT);
    saddr.sin_addr.s_addr = inet_addr(SER_IP);

    int res = bind(sockfd,(struct sockaddr*)&saddr,sizeof(saddr));
    if ( res == -1 )
    {
        return -1;
    }

    listen(sockfd,5);

    return sockfd;
}

cli.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <assert.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <pthread.h>
#include <fcntl.h>

#define  SER_PORT   6000
#define  SER_IP     "127.0.0.1"

int main()
{
    int sockfd = socket(AF_INET,SOCK_STREAM,0);
    assert ( sockfd != -1 );

    struct sockaddr_in saddr;
    memset(&saddr,0,sizeof(saddr));
    saddr.sin_family = AF_INET;
    saddr.sin_port = htons(SER_PORT);
    saddr.sin_addr.s_addr = inet_addr(SER_IP);

    int res = connect(sockfd,(struct sockaddr*)&saddr,sizeof(saddr));
    assert( res != -1 );

    while( 1 )
    {
        char buff[128] = {0};
        printf("Connect success>> ");
        fflush(stdout);
        
        fgets(buff,128,stdin);// ls , rm a.c,  cp  a.txt  b.txt ,get a.c  , put name

        if ( strncmp(buff,"end",3) == 0 )
        {
            break;
        }

        send(sockfd,buff,strlen(buff),0);

        memset(buff,0,128);

        recv(sockfd,buff,127,0);
        printf("%s\n",buff);
    }

    close(sockfd);
}