Ejemplo n.º 1
0
// Handle lifecycle events
func handleSignals(srv *falcore.Server) {
	var sig os.Signal
	pid := syscall.Getpid()
	for {
		sig = <-signal.Incoming
		if usig, ok := sig.(os.UnixSignal); ok {
			switch usig {
			case os.SIGHUP:
				// send this to the paraent process to initiate the restart
				fmt.Println(pid, "Received SIGHUP.  forking.")
				cpid, err := forker(srv)
				fmt.Println(pid, "Forked pid:", cpid, "errno:", err)
			case os.SIGUSR1:
				// child sends this back to the parent when it's ready to Accept
				fmt.Println(pid, "Received SIGUSR1.  Stopping accept.")
				srv.StopAccepting()
			case os.SIGINT:
				fmt.Println(pid, "Received SIGINT.  Shutting down.")
				os.Exit(0)
			case os.SIGTERM:
				fmt.Println(pid, "Received SIGTERM.  Terminating.")
				os.Exit(0)
			case os.SIGTSTP:
				fmt.Println(pid, "Received SIGTSTP.  Stopping.")
				syscall.Kill(pid, syscall.SIGSTOP)
			default:
				fmt.Println(pid, "Received", sig, ": ignoring")
			}
		}
	}
}
Ejemplo n.º 2
0
// setup and fork/exec myself. Make sure to keep open important FD's that won't get re-created by the child
// specifically, std* and your listen socket
func forker(srv *falcore.Server) (pid int, err int) {
	fmt.Printf("Forking now with socket: %v\n", srv.SocketFd())
	mypath := os.Args[0]
	args := []string{mypath, "-socket", fmt.Sprintf("%v", srv.SocketFd())}
	attr := new(syscall.ProcAttr)
	attr.Files = append([]int(nil), 0, 1, 2, srv.SocketFd())
	pid, err = syscall.ForkExec(mypath, args, attr)
	return
}