#include <u.h>#include <libc.h>#include <auth.h>#include <fcall.h> int	connect(char*, char*);int	filter(int);int	fflag;void	catcher(void*, char*);void	error(char*, ...);void	usage(void); voidmain(int argc, char **argv){	char *mntpt;	int fd, mntflags; 	mntflags = MREPL;	ARGBEGIN{	case 'a':		mntflags = MAFTER;		break;	case 'b':		mntflags = MBEFORE;		break;	case 'c':		mntflags |= MCREATE;		break;	case 'C':		mntflags |= MCACHE;		break;	case 'f':		fflag = 1;		break;	default:		usage();	}ARGEND; 	switch(argc) {	case 2:		mntpt = argv[1];		break;	case 3:		mntpt = argv[2];		break;			default:		mntpt = 0;		/* to shut up compiler */		usage();	} 	notify(catcher);	alarm(60*1000);	fd = connect(argv[0], argv[1]);	if(fflag)		fd = filter(fd); 	if(amount(fd, mntpt, mntflags, "") < 0)		error("can't mount %s: %r", argv[1]);	alarm(0);	exits(0);} voidcatcher(void*, char *msg){	if(strcmp(msg, "alarm") == 0)		noted(NCONT);	noted(NDFLT);} intconnect(char *system, char *tree){	char buf[ERRLEN], dir[4*NAMELEN], *na;	int fd, n; 	na = netmkaddr(system, 0, "exportfs");	if((fd = dial(na, 0, dir, 0)) < 0)		error("can't dial %s: %r", system); 	if(auth(fd) < 0)		error("%r: %s", system); 	if(strstr(dir, "tcp"))		fflag = 1; 	n = write(fd, tree, strlen(tree));	if(n < 0)		error("can't write tree: %r"); 	strcpy(buf, "can't read tree"); 	n = read(fd, buf, sizeof buf - 1);	if(n!=2 || buf[0]!='O' || buf[1]!='K'){		buf[sizeof buf - 1] = '\0';		error("bad remote tree: %s\n", buf);	}	return fd;} voiderror(char *fmt, ...){	char msg[256];	va_list arg; 	va_start(arg, fmt);	doprint(msg, msg+sizeof(msg), fmt, arg);	va_end(arg);	fprint(2, "import: %s\n", msg);	exits(msg);} voidusage(void){	print("Usage: import [-abcC] host remotefs [mountpoint]\n");	exits("usage");} voidfatal(int syserr, char *fmt, ...){	char buf[ERRLEN];	va_list arg; 	va_start(arg, fmt);	doprint(buf, buf+sizeof(buf), fmt, arg);	va_end(arg);	if(syserr)		fprint(2, "cpu: %s: %r\n", buf);	else		fprint(2, "cpu: %s\n", buf);	exits(buf);} /* Network on fd1, mount driver on fd0 */intfilter(int fd){	int p[2]; 	if(pipe(p) < 0)		fatal(1, "pipe"); 	switch(rfork(RFNOWAIT|RFPROC|RFFDG)) {	case -1:		fatal(1, "rfork record module");	case 0:		dup(fd, 1);		close(fd);		dup(p[0], 0);		close(p[0]);		close(p[1]);		execl("/bin/aux/fcall", "fcall", 0);		fatal(1, "exec record module");	default:		close(fd);		close(p[0]);	}	return p[1];	}