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: foreground_sysv.go
    path of file: ./repos/restic/internal/backend/util
    
    the code of the file until where you have to start completion: //go:build aix || solaris
// +build aix solaris

package util

import (
	"os/exec"
	"syscall"

	"github.com/restic/restic/internal/errors"
)

func startForeground(cmd *exec.Cmd) (bg func() error, err error) {
	// run the command in its own process group so that SIGINT
	
    
func startForeground(cmd *exec.Cmd) (bg func() error, err error) {
	// run the command in its own process group so that SIGINT
	// is not sent to it.
	cmd.SysProcAttr = &syscall.SysProcAttr{
		Setpgid: true,
	}

	// start the process
	err = cmd.Start()
	if err != nil {
		return nil, errors.Wrap(err, "cmd.Start")
	}

	bg = func() error { return nil }
	return bg, nil
}