#define _GNU_SOURCE
#include <fcntl.h>
#include <stdlib.h>
#include <sys/socket.h>

int main() {
  int sp[2];
  socketpair(AF_UNIX, SOCK_STREAM, 0, sp);
  for(;;)
    splice(sp[0], 0, 1, 0, 128 * 1024 * 1024, 0);
}