Language: Go
Label: safe
CWE: CWE-22 \u2014 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Code:
func ClearFile(path string) error {
	f, err := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
	if err != nil {
		return err
	}
	defer f.Close()
	return nil
}