Factotum: module{	PATH:	con "/dis/lib/factotum.dis"; 	# client interface to Plan 9 or Inferno factotum 	Authinfo: adt {		cuid:	string;	# caller id		suid:	string;	# server id		cap:	string;	# capability (only valid on server side)		secret:	array of byte;		# TO DO: add attrs 		unpack:	fn(a: array of byte): (int, ref Authinfo);		read:	fn(fd: ref Sys->FD): ref Authinfo;	}; 	mount:	fn(fd: ref Sys->FD, mnt: string, flags: int, aname: string, keyspec: string): (int, ref Authinfo); 	# factotum interaction	AuthRpcMax: con 4096; 	init:	fn();	open:	fn(): ref Sys->FD;	rpc:	fn(fd: ref Sys->FD, verb: string, a: array of byte): (string, array of byte);	proxy:	fn(afd: ref Sys->FD, facfd: ref Sys->FD, arg: string): ref Authinfo;	genproxy: fn(		readc: chan of (array of byte, chan of (int, string)),		writec: chan of (array of byte, chan of (int, string)),		donec: chan of (ref Authinfo, string),		afd: ref Sys->FD,		params: string);	rpcattrs:	fn(afd: ref Sys->FD): list of ref Attr; 	getuserpasswd:	fn(keyspec: string): (string, string); 	# challenge/response	Challenge: adt {		user:	string;		chal:	string;		afd:	ref Sys->FD;	}; 	challenge:	fn(keyspec: string): ref Challenge;	response:	fn(c: ref Challenge, resp: string): ref Authinfo;	respond:	fn(chal: string, keyspec: string): (string, string); 	dump:	fn(a: array of byte): string;	setdebug:	fn(i: int); 	Aattr, Aval, Aquery: con iota; 	Attr: adt {		tag:	int;		name:	string;		val:	string; 		text:	fn(a: self ref Attr): string;	}; 	parseattrs:	fn(s: string): list of ref Attr;	copyattrs:		fn(l: list of ref Attr): list of ref Attr;	delattr:	fn(l: list of ref Attr, n: string): list of ref Attr;	takeattrs:	fn(l: list of ref Attr, names: list of string): list of ref Attr;	findattr:	fn(l: list of ref Attr, n: string): ref Attr;	findattrval:	fn(l: list of ref Attr, n: string): string;	publicattrs:	fn(l: list of ref Attr): list of ref Attr;	attrtext:	fn(l: list of ref Attr): string;};