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: exec.go
    path of file: ./repos/sealer/vendor/sigs.k8s.io/kustomize/kyaml/fn/runtime/exec
    
    the code of the file until where you have to start completion: // Copyright 2019 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0

package exec

import (
	"io"
	"os"
	"os/exec"
	"path/filepath"

	"sigs.k8s.io/kustomize/kyaml/errors"
	"sigs.k8s.io/kustomize/kyaml/fn/runtime/runtimeutil"
	"sigs.k8s.io/kustomize/kyaml/yaml"
)

type Filter struct {
	// Path is the path to the executable to run
	Path string `yaml:"path,omitempty"`

	// Args are the arguments to the ex
    
func (c *Filter) Run(reader io.Reader, writer io.Writer) error {
	cmd := exec.Command(c.Path, c.Args...)
	cmd.Stdin = reader
	cmd.Stdout = writer
	cmd.Stderr = os.Stderr
	if c.WorkingDir == "" {
		return errors.Errorf("no working directory set for exec function")
	}
	if !filepath.IsAbs(c.WorkingDir) {
		return errors.Errorf(
			"relative working directory %s not allowed", c.WorkingDir)
	}
	if c.WorkingDir == "/" {
		return errors.Errorf(
			"root working directory '/' not allowed")
	}
	cmd.Dir = c.WorkingDir
	return cmd.Run()
}