无名管道进程间通信

#include<iostream>

#include<unistd.h>

#include<string.h>

#include<sys/types.h>

#include<sys/wait.h>

#include <sys/ipc.h>

#include <sys/shm.h>

using namespace std;

int main()

{

//创建共享内存 长度是1024 权限为666

int shmid = shmget(IPC_PRIVATE,1024,0666);

if(shmid<0)

{

cout<<"error:"<<shmid<<endl;

}

else

{

cout<<"sucess:"<<shmid<<endl;

}

char* shnmbuf = (char*)shmat(shmid,0,0);

int i=30;

while(i)

{

sleep(1);

cout<<i--<<endl;

}

shmdt(shnmbuf);

return 0;

}

来自为知笔记(Wiz)