extern	void		kclose(int);extern	int		kdirfstat(int, Dir*);extern	void		kerrstr(char*);extern	void		kgerrstr(char*);extern	int		kopen(char*, int);extern	long		kread(int, void*, long);extern	void		kwerrstr(char*, ...);extern	long		kwrite(int, void*, long); extern	char*	syserr(char*, char*, Prog*); #pragma	varargck	argpos kwerrstr 1