【 *** 作系统实验】匿名管道通信、命名管道通信

环境：Linux *** 作系统Ubuntu 

#include
#include
#include
#include
int main(){
	int fd[2];
	pid_t p;
	char buf[100];
	if((pipe(fd))==0){	//管道创建成功
		p = fork();	//创建一个子进程
		if(p==0){	//创建子进程成功
			close(fd[1]);
			sleep(3);
			read(fd[0],buf,100);
			printf("child process read date successfully!\n");
			printf("data:%s\n",buf);
			close(fd[0]);
			return 0;
		}
		else if(p>0){
			close(fd[0]);
			write(fd[1],"hello world",11);
			printf("write in the pipe successfully!\n");
			close(fd[1]);
			printf("parent close write pipe successfully!\n");
			sleep(3);
		}
	}
	return 0;
}

#include
#include
#include
#include
#include
#include
#include
#include
int main(){
	char buf[100];
	char* path = "fifo";
	int fi = mkfifo(path,0666);	//创建命名管道文件
	int fifo_fd;
	int fifo_wr;
	if(fi<0){
		printf("create fifo error!\n");
		return 0;
	}
	printf("create fifo successfully!\n");
	pid_t p;
	p = fork();
	if(p==0){
		fifo_fd = open(path,O_WRONLY);
		if(fifo_fd<0){
			printf("write error!\n");
			return 0;
		}
		printf("write in fifo successfully!\n");
		write(fifo_fd,"hello world",11);
		sleep(3);
		close(fifo_fd);
	}
	else if(p>0){
		fifo_fd = open(path,O_RDONLY);
		printf("buf before read fifo:%s\n",buf);
		read(fifo_fd,buf,11);
		printf("buf:%s\n",buf);
		close(fifo_fd);
	}
	else{
		printf("create child process error!\n");
		return 0;
	}
	return 0;
}

 命名管道通信实验中，每次运行后可删除新建的fifo文件，以备下一次运行