#include <stdio.h>
int main()
{
    setvbuf(stdout,NULL,_IONBF,0);
    /*
    FILE *f=fopen("~testpipe","rw");

    int pid=_fork();

    if(pid==0)
    {
	char buf[2];
	fread(buf,1,1,f);
	printf("[%c]\n",buf[0]);
	while(1);
    }

    else
    {
	char buf[]="666";
	fwrite(buf,1,1,f);
	printf("written\n");
	while(1);
    }
    */
    int f=_open("~testpipe","RW");
    int pid=_fork();
    if(pid==0)
    {
	char buf[2];
	while(_read(f,buf,1))printf("%c",buf[0]);
    }

    else
    {
	char buf[]="666 the number of the beast";
	_write(f,buf,27);
	printf("written\n");
    }
    

}