You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: safesocket_plan9.go
    path of file: ./repos/sliver/vendor/tailscale.com/safesocket
    
    the code of the file until where you have to start completion: // Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause

//go:build plan9

package safesocket

import (
	"fmt"
	"net"
	"os"
	"syscall"
	"time"

	"golang.org/x/sys/plan9"
)

// Plan 9's devsrv srv(3) is a server registry  and
// it is conventionally bound to "/srv" in the default
// namespace. It is "a one level directo
    
func listen(path string) (net.Listener, error) {
	const O_RCLOSE = 64 // remove on close; should be in plan9 package
	var pip [2]int

	err := plan9.Pipe(pip[:])
	if err != nil {
		return nil, err
	}
	defer plan9.Close(pip[1])

	srvfd, err := plan9.Create(path, plan9.O_WRONLY|plan9.O_CLOEXEC|O_RCLOSE, 0600)
	if err != nil {
		return nil, err
	}
	srv := os.NewFile(uintptr(srvfd), path)

	_, err = fmt.Fprintf(srv, "%d", pip[1])
	if err != nil {
		return nil, err
	}

	return &plan9SrvListener{name: path, srvf: srv, file: os.NewFile(uintptr(pip[0]), path)}, nil
}