【操作系统】Linux高级进程通信（头歌作业）

第1关 socket之本地通信

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>

int localsocket_test(const char *buffer, char *recv_buff, int length)
{
	/*********begin***********/

    static struct sockaddr_un srv_addr;
    // creat unix socket
    int connect_fd = socket(PF_UNIX,SOCK_STREAM,0);
    if(connect_fd < 0)
    {
        perror("cannot creat socket");
        return -1;
    }
    srv_addr.sun_family = AF_UNIX;
    strncpy(srv_addr.sun_path, "./socket_test", strlen("./socket_test"));
    //connect server
    int ret = connect(connect_fd,(struct sockaddr*)&srv_addr,sizeof(srv_addr));
    if (ret < 0)
    {
        perror("cannot connect server");
        close(connect_fd);
        return -1;
    }

    /*send message to server*/
    if(0 > write(connect_fd, buffer, strlen(buffer)))
    {
        perror("send message failed\n");
        close(connect_fd);
        return -1;
    }
    if(0 < read(connect_fd, recv_buff, length))
    {
        ret = 0;
    }
    else
    {
        ret = -1;
    }
    close(connect_fd);
    return ret;
	
	/**********end************/
}

第2关 命名管理

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#include <string.h>

void namepipe_commu(const char *buffer)
{
	/***********begin***********/
     int res = 0;
        if (access("./my_fifo", F_OK) == -1) {
            res = mkfifo("./my_fifo", 0777);
            if (res == -1) {
                perror("Error creating named pipe");
                return;
            }
        }
        int pipe_fd = open("./my_fifo", O_WRONLY);
        if (pipe_fd == -1) {
            perror("Error opening named pipe");
            return;
        }
        ssize_t bytes_write = write(pipe_fd, buffer, strlen(buffer));
        if (bytes_write == -1) {
            perror("Error writing to named pipe");
        }
        close(pipe_fd);
	
	/***********end***********/
}

第3关 消息队列

#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>

struct msgbuf
{
    long mytype;
    char bookname[100];
};

void mq_commu (void)
{
	/*********Begin*********/

    key_t key=0x1234;
 
    //创建消息队列
    int msgid=msgget(key,IPC_CREAT|0666);
 
    struct msgbuf message;
    message.mytype=66;
 
    //发送三条消息
    strcpy(message.bookname,"C");
    msgsnd(msgid,&message,sizeof(struct msgbuf)-sizeof(long),0);
    sleep(1);//等待一秒
 
    strcpy(message.bookname,"Linux"); 
    msgsnd(msgid,&message,sizeof(struct msgbuf)-sizeof(long),0);
    sleep(1);//等待一秒
 
    strcpy(message.bookname,"Makefile");
    msgsnd(msgid, &message,sizeof(struct msgbuf)-sizeof(long),0);
    sleep(1);//等待一秒
     
    //最后发送一条"End"消息
    strcpy(message.bookname,"End");
    msgsnd(msgid,&message,sizeof(struct msgbuf)-sizeof(long),0);


	/**********End**********/
}