3e6
#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 * thread(void * arg)
{
    fd_set readfds;
    struct timeval timeout;
    int n;

    while (1) {
	usleep(200000);
	
	FD_ZERO(&readfds);
	FD_SET(pfds[0], &readfds);
	timeout.tv_sec = 0;
	timeout.tv_usec = 0;
	if (! (n = select(pfds[0] + 1, &readfds, NULL, NULL, &timeout)))
	    continue;
	if (n < 0) {
	    perror("select");
	    return NULL;
	}

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


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

    pthread_create(&th, NULL, thread, NULL);
    usleep(1000);

    while (1) {
	n = write(pfds[1], buf, 100000);
	usleep(1000);
    }
}

.

0