【C语言】无名管道

#include <unistd.h>
#include <sys/types.h>
#include <stdio.h>

int main(void)
{
    int fd[2];
    int pid;

    if(pipe(fd) == -1)
        perror("pipe");
//创建子进程
    pid = fork();
//判断如果是父进程
    if(pid > 0)
    {
//关闭管道读端
        close(fd[0]);
        sleep(5);
//写入ab两个字母
        write(fd[1],"ab",2);

        while(1);
    }
//判断子进程
    else if(pid == 0)
    {
        char ch[2];
        printf("Child process is waiting for data: \n");
//关闭管道写端
        close(fd[1]);
//读取管道两个字母
        read(fd[0],ch,2);
        printf("Read from pipe: %s\n",ch);
    }
    return 0;
}