#include <u.h>#include <libc.h>#include <authsrv.h>#include <bio.h>#include "authcmdlib.h" void	install(char*, char*, int);void	usage(void); voidmain(int argc, char *argv[]){	char *key;	char *u;	char keybuf[DESKEYLEN]; 	argv0 = "printnetkey";	fmtinstall('K', keyfmt); 	ARGBEGIN{	default:		usage();	}ARGEND	if(argc != 1)		usage(); 	u = argv[0];	fmtinstall('K', keyfmt);		if(memchr(u, '\0', ANAMELEN) == 0)		error("bad user name");	key = findkey(NETKEYDB, u, keybuf);	if(!key)		error("%s has no netkey\n", u);	print("user %s: net key %K\n", u, key);	exits(0);} voidusage(void){	fprint(2, "usage: printnetkey user\n");	exits("usage");}