/*

编写一个程序，使用pipe函数创建一个匿名管道，并使用write向管道的一端写入数据，使用read函数从管道的另一端读取数据。
*/

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

#define BUFSIZE PIPE_BUF

int main(int argc, char *argv[])
{
int fd[2];
int len;
pid_t pid;
char buffer[BUFSIZ]="hello,Linux world!\n";

//create pipeif(pipe(fd)<0){ printf("pipe failed!\n"); exit(1);}//create son processif((pid=fork())<0){ printf("fork failed!\n"); exit(1);}else if(pid>0)// father process{ close(fd[0]); write(fd[0],buf,strlen(buf));//father process write data to pipe exit(0);}else{ close(fd[1]);//son process close the write of pipe len=read(fd[0],buf,BUFSIZE);//son process read data from pipe if(len<0) { printf("process failed when read a pipe.\n"); exit(1); } else write(STDOUT_FILENO,buf,len);//output to stdout exit(0);}//return 0;

}