#include "apue.h"#include <fcntl.h>#define	FIFO	"temp.fifo"intmain(void){	int		fdread, fdwrite;	unlink(FIFO);	if (mkfifo(FIFO, FILE_MODE) < 0)		err_sys("mkfifo error");	if ((fdread = open(FIFO, O_RDONLY | O_NONBLOCK)) < 0)		err_sys("open error for reading");	if ((fdwrite = open(FIFO, O_WRONLY)) < 0)		err_sys("open error for writing");	clr_fl(fdread, O_NONBLOCK);	exit(0);}