#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

main()
{
    char *s, buf[1024];
     int fds[2], i;
     s = "hello world\n";
     pipe(fds);
     if (fork() == 0) {
	 write(fds[1], s, 12);
         printf("child process: \n");
         exit(0);
     }
     i = read(fds[0], buf, 6);
     buf[i] = '\0';
     printf("parent process: i = %d\n", i);
     write(1, buf, 6);
}


/* example2.c */
/* IPC can be used to enforce the order */