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: rchcon.go
    path of file: ./repos/octant/vendor/github.com/opencontainers/selinux/go-selinux
    
    the code of the file until where you have to start completion: // +build linux,go1.16

package selinux

import (
	"errors"
	"io/fs"
	"os"

	"github.com/opencontainers/selinux/pkg/pwalkdir"
)

func rchcon(fpath,
    
func rchcon(fpath, label string) error {
	return pwalkdir.Walk(fpath, func(p string, _ fs.DirEntry, _ error) error {
		e := setFileLabel(p, label)
		// Walk a file tree can race with removal, so ignore ENOENT.
		if errors.Is(e, os.ErrNotExist) {
			return nil
		}
		return e
	})
}