kata-containers/src/runtime/virtcontainers/syscall.go

// Copyright 2015 The rkt Authors
// Copyright (c) 2016 Intel Corporation
//
// SPDX-License-Identifier: Apache-2.0
//

package virtcontainers

import (
	"fmt"
	"os"
	"path/filepath"
)

// ensureDestinationExists will recursively create a given mountpoint. If directories
// are created, their permissions are initialized to mountPerm
func ensureDestinationExists(source, destination string) error {
	fileInfo, err := os.Stat(source)
	if err != nil {
		return fmt.Errorf("could not stat source location %v: %v", source, err)
	}

	targetPathParent, _ := filepath.Split(destination)
	if err := os.MkdirAll(targetPathParent, mountPerm); err != nil {
		return fmt.Errorf("could not create parent directory %v: %v", targetPathParent, err)
	}

	if fileInfo.IsDir() {
		if err := os.Mkdir(destination, mountPerm); !os.IsExist(err) {
			return err
		}
	} else {
		file, err := os.OpenFile(destination, os.O_CREATE, mountPerm)
		if err != nil {
			return err
		}

		file.Close()
	}
	return nil
}