Readdir: module{	PATH:	con	"/dis/lib/readdir.dis"; 	# sortkey is one of NAME, ATIME, MTIME, SIZE, or NONE	# possibly with DESCENDING or'd in 	NAME, ATIME, MTIME, SIZE, NONE: con iota;	DESCENDING:	con (1<<5); 	init:	fn(path: string, sortkey: int): (array of ref Sys->Dir, int);	readall:	fn(fd: ref Sys->FD, sortkey: int): (array of ref Sys->Dir, int);	sortdir:fn(a: array of ref Sys->Dir, key: int): (array of ref Sys->Dir, int); 	# COMPACT can be or'd into sortkey to preserve only the first	# (by depth) of a group of duplicate names in a union 	COMPACT:	con (1<<4);};