#include <u.h>#include <libc.h>#include <bio.h>#include <auth.h>#include <fcall.h> Fcall	hdr;char	dest[2*NAMELEN]; void	error(char *);int	cyclone(void);void	rpc(int, int);void	post(char*, int);void	mountfs(char*, int); voidusage(void){	fprint(2, "usage: %s [-m] [net!]host [srvname [mtpt]]\n", argv0);		exits("usage");} voidmain(int argc, char *argv[]){	int fd, cfd;	char srv[64], mtpt[64];	char dir[NAMELEN*4];	char err[ERRLEN];	char tickets[2*TICKETLEN];	char *p, *p2;	int domount, record, try; 	domount = 0;	record = 0;	ARGBEGIN{	case 'm':		domount = 1;		break;	case 'r':		record = 1;		break;	default:		usage();		break;	}ARGEND 	switch(argc){	case 1:	/* calculate srv and mtpt from address */		p = strrchr(argv[0], '/');		p = p ? p+1 : argv[0];		sprint(srv, "/srv/%.28s", p);		p2 = strchr(p, '!');		p2 = p2 ? p2+1 : p;		sprint(mtpt, "/n/%.28s", p2);		break;	case 2:	/* calculate mtpt from address, srv given */		sprint(srv, "/srv/%.28s", argv[1]);		p = strrchr(argv[0], '/');		p = p ? p+1 : argv[0];		p2 = strchr(p, '!');		p2 = p2 ? p2+1 : p;		sprint(mtpt, "/n/%.28s", p2);		break;	case 3:	/* srv and mtpt given */		domount = 1;		sprint(srv, "/srv/%.28s", argv[1]);		sprint(mtpt, "%.28s", argv[2]);		break;	default:		usage();	} 	try = 0;Again:	try++;	if(access(srv, 0) == 0){		if(domount){			fd = open(srv, ORDWR);			if(fd >= 0)				goto Mount;			remove(srv);		}		else{			fprint(2, "srv: %s already exists\n", srv);			exits(0);		}	} 	strcpy(dest, *argv); 	if(strncmp(*argv, "cyc!", 4) == 0)		fd = cyclone();	else {		fd = dial(netmkaddr(*argv, 0, "9fs"), 0, dir, &cfd);		if(fd < 0) {			fprint(2, "srv: dial %s: %r\n", netmkaddr(*argv, 0, "9fs"));			exits("dial");		}		if(record || strstr(dir, "tcp")) {			if(write(cfd, "push fcall", 10) < 0) {				fprint(2, "srv: push fcall %r\n");				exits(0);			}			close(cfd);		}	} 	fprint(2, "session...");	fsession(fd, tickets);	post(srv, fd); Mount:	if(domount == 0)		exits(0); 	if(amount(fd, mtpt, MREPL, "") < 0){		err[0] = 0;		errstr(err);		if(strstr(err, "hungup") || strstr(err, "timed out")){			remove(srv);			if(try == 1)				goto Again;		}		fprint(2, "srv %s: mount failed: %s\n", dest, err);		exits("mount");	}	exits(0);} voidpost(char *srv, int fd){	int f;	char buf[128]; 	fprint(2, "post...\n");	f = create(srv, OWRITE, 0666);	if(f < 0){		sprint(buf, "create(%s)", srv);		error(buf);	}	sprint(buf, "%d", fd);	if(write(f, buf, strlen(buf)) != strlen(buf))		error("write");} intcyclone(void){	int fd; 	fd = open("#H/hotrod", ORDWR);	if(fd < 0)		error("opening #H/hotrod");	return fd;} voiderror(char *s){	fprint(2, "srv %s: %s: %r\n", dest, s);	exits("srv: error");}