Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!tut.cis.ohio-state.edu!mailrus!ncar!mephisto!mcnc!kk
From: kk@mcnc.org (Krzysztof Kozminski)
Newsgroups: comp.sys.mac.programmer
Subject: Re: PBHGetVInfo returns noErr but volRefNum=-1
Message-ID: <2074@speedy.mcnc.org>
Date: 8 May 90 04:08:03 GMT
References: <9166@tank.uchicago.edu>
Reply-To: kk@mcnc.org.UUCP (Krzysztof Kozminski)
Organization: MCNC; RTP, NC
Lines: 26

In article <9166@tank.uchicago.edu> gft_robert@gsbacd.uchicago.edu writes:
>Well, I have for the first time delved into the PB calls, and am having some
>problems.  At one point in my program I'm trying to convert a volume name to a
>vol ref num and I do the following:
> [OK code deleted]
>I get noErr (0) for theOSErr, but ioVRefNum comes back as -1.  What am I doing
>wrong?  

Nothing wrong, -1 is a correct result. volRefNums are small negative
numbers.  Perhaps you're thinking about path reference numbers (like
those returned by the standard file dialogs) to be used with things
like FSOpen and such.  To get a large negative number you expect (I
think) you'll need to make a working directory.  Or, alternately, use
hierarchical versions of the file routines (see TN 218).

>Any info much appreciated! (BTW, is there a clearer exposition of the PB calls
>in general than in IM IV?  I've re-read it a couple of times, and though it's
>well-written, it could be a bit more explicit at times.)

Technical Notes can clarify some things, and some sample code therein
is quite informative...

KK
-- 
Kris Kozminski   kk@mcnc.org
"The party was a masquerade; the guests were all wearing their faces."