extern char	Ebadstreamdev[];	/* bad streamdev */
extern char	Einit[];		/* initialization failed */
extern char	Esectorsize[];		/* bad sectorsize */
extern char	Enomem[];		/* no memory */
extern char	Einuse[];		/* in use */
extern char	Enospace[];		/* not enough space */
extern char	Ebadarg[];		/* bad argument */
extern char	Etoolong[];		/* too long */