implement Fsmodule;include "sys.m";	sys: Sys;include "draw.m";include "sh.m";	sh: Sh;	Context: import sh;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; types(): string{	return "sc";} 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);	sh = load Sh Sh->PATH;	if(sh == nil)		badmod(Sh->PATH);	sh->initialise();} run(drawctxt: ref Draw->Context, nil: ref Report,			nil: list of Option, args: list of ref Value): ref Value{	c := (hd args).c().i;	ctxt := Context.new(drawctxt);	ctxt.setlocal("s", nil);	{		ctxt.run(ref Sh->Listnode(c, nil)::nil, 0);	} exception e {	"fail:*" =>		sys->fprint(sys->fildes(2), "fs: run: exception %q raised in %s\n", e[5:], sh->cmd2string(c));		return nil;	}	sl := ctxt.get("s");	if(sl == nil || tl sl != nil){		sys->fprint(sys->fildes(2), "fs: run: $s has %d members; exactly one is required\n", len sl);		return nil;	}	s := (hd sl).word;	if(s == nil && (hd sl).cmd != nil)		s = sh->cmd2string((hd sl).cmd);	return ref Value.S(s);}