Using epoll from Go.

epoll.go

package main

import (
	"log"
	"os"
	"syscall"
)

func main() {
	f, err := os.Open("/tmp/pipe")
	if err != nil {
		log.Fatal("file open error ", err)
	}
	defer f.Close()
	fd := int(f.Fd())

	if err := syscall.SetNonblock(fd, true); err != nil {
		log.Fatal("failed to switch fd to non-blocking mode ", err)
	}

	epollFd, err := syscall.EpollCreate1(0)
	if err != nil {
		log.Fatal("epoll create error ", err)
	}
	defer syscall.Close(epollFd)

	if err := syscall.EpollCtl(epollFd, syscall.EPOLL_CTL_ADD, fd,
		&syscall.EpollEvent{Events: syscall.EPOLLIN, Fd: int32(fd)}); err != nil {
		log.Fatal("error registering event ", err)
	}

	events := make([]syscall.EpollEvent, 32)

	n, err := syscall.EpollWait(epollFd, events, -1)
	if err != nil {
		log.Fatal("error receiving events from epoll ", err)
	}
	for _, ev := range events[:n] {
		log.Printf("read event on fd #%d", ev.Fd)
	}
}