implement Fsmodule;include "sys.m";	sys: Sys;include "draw.m";include "sh.m";include "fslib.m";	fslib: Fslib;	Report, Value, type2s, quit: import fslib;	Fschan, Fsdata, Entrychan, Entry,	Gatechan, Gatequery, Nilentry, Option,	Next, Down, Skip, Quit: import Fslib; # set the root types(): string{	return "xsx-c";} badmod(p: string){	sys->fprint(sys->fildes(2), "fs: size: cannot load %s: %r\n", p);	raise "fail:bad module";} init(){	sys = load Sys Sys->PATH;	fslib = load Fslib Fslib->PATH;	if(fslib == nil)		badmod(Fslib->PATH);} run(nil: ref Draw->Context, nil: ref Report,			opts: list of Option, args: list of ref Value): ref Value{	root := (hd args).s().i;	if(root == nil && opts == nil){		sys->fprint(sys->fildes(2), "fs: setroot: empty path\n");		return nil;	}	v := ref Value.X(chan of (Fsdata, chan of int));	spawn setroot((hd tl args).x().i, v.i, root, opts != nil);	return v;} setroot(src, dst: Fschan, root: string, cflag: int){	((d, nil), reply) := <-src;	if(cflag){		createroot(src, dst, root, d, reply);	}else{		myreply := chan of int;		rd := ref *d;		rd.name = root;		dst <-= ((rd, nil), myreply);		if(<-myreply == Down){			reply <-= Down;			fslib->copy(src, dst);		}	}} createroot(src, dst: Fschan, root: string, d: ref Sys->Dir, reply: chan of int){	if(root == nil)		root = d.name;	(n, elems) := sys->tokenize(root, "/");		# XXX should really do a cleanname first	if(root[0] == '/'){		elems = "/" :: elems;		n++;	}	myreply := chan of int;	lev := 0;	r := -1;	for(; elems != nil; elems = tl elems){		rd := ref *d;		rd.name = hd elems;		dst <-= ((rd, nil), myreply);		case r = <-myreply {		Quit =>			(<-src).t1 <-= Quit;			exit;		Skip =>			break;		Next =>			lev++;			break;		}		lev++;	}	if(r == Down){		reply <-= Down;		if(fslib->copy(src, dst) == Quit)			exit;	}else		reply <-= Quit;	while(lev-- > 1){		dst <-= ((nil, nil), myreply);		if(<-myreply == Quit){			(<-src).t1 <-= Quit;			exit;		}	}}