#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <pthread.h>
#include <sys/time.h>
#include <sys/types.h>
#include <math.h>

int pfds[2];
char buf[100000];


void do_fork(void)
{
    fd_set readfds;
    struct timeval timeout;
    int n;

    n = read(pfds[0], buf, 100000);
    printf("%d bytes read\n", n);
}


int main()
{
    pid_t pid;
    int n;
    
    if (pipe(pfds) < 0) {
	fprintf(stderr, "Couldn't create pipe\n");
	exit(1);
    }

    pid = fork();
    if (! pid) {
        close(pfds[1]);
	do_fork();
    } else
        close(pfds[0]);

    usleep(1000);

    printf("writing\n");
    n = write(pfds[1], buf, 1);
    getchar();
}
.