cilium/cilium · error

failed to create file %s: %w

Error message

failed to create file %s: %w

What it means

For each regular file entry, extractZip creates the destination file with os.OpenFile using the entry's stored permissions. Failure to create/open the destination file produces this wrapped error.

Source

Thrown at cilium-cli/features/summary.go:252

		destPath := filepath.Join(destDir, cleanName)
		if !strings.HasPrefix(destPath, filepath.Clean(destDir)+string(os.PathSeparator)) {
			return fmt.Errorf("file path escapes destination directory: %s", destPath)
		}

		if file.FileInfo().IsDir() {
			// Create directories
			if err := os.MkdirAll(destPath, os.ModePerm); err != nil {
				return fmt.Errorf("failed to create directory %s: %w", destPath, err)
			}
			continue
		}
		// Create directories
		os.MkdirAll(filepath.Dir(destPath), os.ModePerm)

		// Extract files
		destFile, err := os.OpenFile(destPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, file.Mode())
		if err != nil {
			return fmt.Errorf("failed to create file %s: %w", destPath, err)
		}
		srcFile, err := file.Open()
		if err != nil {
			destFile.Close()
			return fmt.Errorf("failed to open file in ZIP archive %s: %w", file.Name, err)
		}
		_, err = io.Copy(destFile, srcFile)
		destFile.Close()
		srcFile.Close()
		if err != nil {
			return fmt.Errorf("failed to extract file %s: %w", file.Name, err)
		}
	}

	return nil
}

// nodesValues maps a node to value

View on GitHub (pinned to ac7b90affa)

Solutions

1. Clean destDir and re-extract to remove stale conflicting entries
2. Check free disk space and write permissions on destDir
3. Retry with elevated permissions if the destination is protected
4. Check for security software (SELinux/AppArmor) denying writes

Example fix

// before
extractZip(tempFile, destDir)
// after
os.RemoveAll(destDir)
os.MkdirAll(destDir, 0o755)
extractZip(tempFile, destDir)

if fi, err := os.Stat(destDir); err != nil || !fi.IsDir() {
	return fmt.Errorf("destination %s must exist and be a directory", destDir)
}

if err := extractZip(zipPath, destDir); err != nil {
	var pathErr *fs.PathError
	if errors.As(err, &pathErr) {
		switch {
		case errors.Is(pathErr.Err, fs.ErrPermission): // fix perms
		case errors.Is(pathErr.Err, syscall.ENOSPC): // free disk space
		}
	}
	return err
}

When it happens

Trigger: os.OpenFile(destPath, O_WRONLY|O_CREATE|O_TRUNC, file.Mode()) fails: parent directory missing or unwritable, or the target exists as a directory/read-only file.

Common situations: Archive entries with modes like 0555 being re-extracted over existing files; disk full; antivirus or SELinux blocking writes; partial prior extraction left a directory where a file belongs.

Related errors

• Failed to open file %s for writing: %w
• could not create report dir %q: %w
• failed to create directory %s: %w
• failed to create temp file %s: %w
• failed to extract artifact %s: %w

AI-assisted analysis of cilium/cilium@ac7b90affa (2026-08-31). Data as JSON: /api/errors/4bec191abc4411e9. Report an issue: GitHub.