zero/internal/peermsg/private_dir_other.go

//go:build !unix && !windows

package peermsg

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

func ensurePrivateDir(path string) error {
	abs, err := filepath.Abs(path)
	if err != nil {
		return err
	}
	volume := filepath.VolumeName(abs)
	current := volume + string(filepath.Separator)
	for _, component := range strings.Split(strings.TrimPrefix(abs[len(volume):], string(filepath.Separator)), string(filepath.Separator)) {
		if component == "" {
			continue
		}
		current = filepath.Join(current, component)
		info, statErr := os.Lstat(current)
		if errors.Is(statErr, os.ErrNotExist) {
			if err := os.Mkdir(current, 0o700); err != nil && !errors.Is(err, os.ErrExist) {
				return err
			}
			info, statErr = os.Lstat(current)
		}
		if statErr != nil {
			return statErr
		}
		if !info.IsDir() || info.Mode()&os.ModeSymlink != 0 {
			return fmt.Errorf("refusing non-directory or symlink runtime path %q", current)
		}
	}
	return os.Chmod(abs, 0o700)
}