extern char Enoerror[];		/* no error */
extern char Emount[];		/* inconsistent mount */
extern char Eunmount[];		/* not mounted */
extern char Eunion[];		/* not in union */
extern char Emountrpc[];	/* mount rpc error */
extern char Eshutdown[];	/* mounted device shut down */
extern char Enocreate[];	/* mounted directory forbids creation */
extern char Enonexist[];	/* file does not exist */
extern char Eexist[];		/* file already exists */
extern char Ebadsharp[];	/* unknown device in # filename */
extern char Enotdir[];		/* not a directory */
extern char Eisdir[];		/* file is a directory */
extern char Ebadchar[];		/* bad character in file name */
extern char Efilename[];	/* file name syntax */
extern char Eperm[];		/* permission denied */
extern char Ebadusefd[];	/* inappropriate use of fd */
extern char Ebadarg[];		/* bad arg in system call */
extern char Einuse[];		/* device or object already in use */
extern char Eio[];		/* i/o error */
extern char Etoobig[];		/* read or write too large */
extern char Etoosmall[];	/* read or write too small */
extern char Enetaddr[];		/* bad network address */
extern char Emsgsize[];		/* message is too big for protocol */
extern char Enetbusy[];		/* network device is busy or allocated */
extern char Enoproto[];		/* network protocol not supported */
extern char Enoport[];		/* network port not available */
extern char Enoifc[];		/* bad interface or no free interface slots */
extern char Enolisten[];	/* not announced */
extern char Ehungup[];		/* write to hungup channel */
extern char Ebadctl[];		/* bad process or channel control request */
extern char Enodev[];		/* no free devices */
extern char Enoenv[];		/* no free environment resources */
extern char Emuxshutdown[];	/* mux server shut down */
extern char Emuxbusy[];		/* all mux channels busy */
extern char Emuxmsg[];		/* bad mux message format or mismatch */
extern char Eprocdied[];	/* process exited */
extern char Enochild[];		/* no living children */
extern char Eioload[];		/* i/o error in demand load */
extern char Enovmem[];		/* virtual memory allocation failed */
extern char Ebadld[];		/* illegal line discipline */
extern char Ebadfd[];		/* fd out of range or not open */
extern char Eisstream[];	/* seek on a stream */
extern char Ebadexec[];		/* exec header invalid */
extern char Etimedout[];	/* connection timed out */
extern char Econrefused[];	/* connection refused */
extern char Enetunreach[];	/* network unreachable */
extern char Eintr[];		/* interrupted */
extern char Eneedservice[];	/* service required for tcp/udp/il calls */
extern char Enomem[];		/* kernel allocate failed */
extern char Enoswap[];		/* swap space full */
extern char Esfnotcached[];	/* subfont not cached */
extern char Esoverlap[];	/* segments overlap */
extern char Emouseset[];	/* mouse type already set */
extern char Erecover[];		/* failed to recover fd */
extern char Eshort[];		/* i/o count too small */
extern char Egreg[];		/* ken scheduled it */
extern char Ebadspec[];		/* bad attach specifier */
extern char Enoreg[];		/* process has no saved registers */