Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!apple!ames!pacbell!att!alberta!idacom!danny
From: danny@idacom.UUCP (Danny Wilson)
Newsgroups: comp.sys.apollo
Subject: go to old directory == 'back' ??
Keywords: Aegis shell levels
Message-ID: <678@idacom.UUCP>
Date: 9 Jun 89 22:01:09 GMT
Organization: IDACOM Electronics Ltd., Edmonton, Alta.
Lines: 39


When using the C shell, I have a handy alias that returns you to 
the directory you were just in. This involves making an alias
for 'cd' and 'back':

	alias cd   set old=$cwd; chdir !*
	alias back set back=$old; set old=$cwd; cd $back; unset back; dirs

I thought this would be a great function for the Aegis shell. I made
the following shell scripts:

file: wd
	eon
	if eqs ^1 "" then
		/com/wd		# no parameters, just print where we are
		return
	endif
	old := ^"/com/wd" 
	export old
	/com/wd ^1

file: back
	eon
	back := ^old
	old := ^"/com/wd"
	/com/wd ^back
	dlvar back
	/com/wd

However, because the variable 'old' gets set at a lower shell level it
is undefined within program 'back'. Has anyone got a solution for
a (seemingly) easy problem like this?


-- 
Danny Wilson
IDACOM Electronics		danny@idacom.uucp
Edmonton, Alberta		alberta!idacom!danny
C A N A D A