Path: utzoo!attcan!uunet!seismo!sundc!pitstop!sun!amdahl!apple!darin
From: darin@Apple.COM (Darin Adler)
Newsgroups: comp.sys.mac.programmer
Subject: Re: PBHGetFInfo modifies ioDirID
Message-ID: <9835@apple.Apple.Com>
Date: 13 May 88 10:40:40 GMT
References: <3691@sdcc6.ucsd.EDU> <8998@apple.Apple.Com>
Reply-To: darin@apple.UUCP (Darin Adler)
Organization: Apple
Lines: 24

In article <8998@apple.Apple.Com> darin@apple.UUCP (Darin Adler) I wrote:
> In article <3691@sdcc6.ucsd.EDU> ir10@sdcc6.ucsd.EDU (Donald R. Fredkin) writes:
> > Does anyone know why PBHGetFInfo modifies the field ioDirID in the
> > HParamBlockRec it is given?  What, if anything, is the significance
> > of modified value?
> 
> The value returned in ioDirID is the id of the parent directory of the file,
> i.e. the directory that contains it. This can be useful if you passed a
> working directory in the ioVRefNum field.

Whoops!

I was completely mistaken here!

The value returned in ioDirID is what is called the "file ID". This is a unique
number assigned to each file on an HFS volume when it is created. It is created
in the same way that a dirID is ... the volume starts with 1 and gives a new
number to each new file or directory. As a matter of fact, there is only one
set of numbers, shared by both files and directories.

Sorry about the incorrect information.
-- 
Darin Adler						AppleLink:Adler4
UUCP: {sun,voder,nsc,mtxinu,dual}!apple!darin	  CSNET: darin@Apple.com