element = p[:i]
			p = p[i+1:]
		}
		if isReservedName(element) {
			return "", errInvalidPath
		}
	}
	if containsSlash {
		// We can't depend on strings, so substitute \ for / manually.
		buf := []byte(path)
		for i, b := range buf {
			if b == '/' {
				buf[i] = '\\'
			}
		}
		path = string(buf)
	}
	return path, nil
}

// isReservedName reports if name is a Windows reserved device name.