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: unix_socket.go
    path of file: ./repos/comply/vendor/github.com/docker/go-connections/sockets
    
    the code of the file until where you have to start completion: // +build !windows

package sockets

import (
	"net"
	"os"
	"syscall"
)

// NewUnixSocket creates a unix socket with the specified pat
    
func NewUnixSocket(path string, gid int) (net.Listener, error) {
	if err := syscall.Unlink(path); err != nil && !os.IsNotExist(err) {
		return nil, err
	}
	mask := syscall.Umask(0777)
	defer syscall.Umask(mask)

	l, err := net.Listen("unix", path)
	if err != nil {
		return nil, err
	}
	if err := os.Chown(path, 0, gid); err != nil {
		l.Close()
		return nil, err
	}
	if err := os.Chmod(path, 0660); err != nil {
		l.Close()
		return nil, err
	}
	return l, nil
}