Ned,

> FileDirectory>>exists
> "Answer whether the directory exists"
> 
> 	| result |
> 	result _ self primLookupEntryIn: pathName index: 1.
> 	^ result ~= #badDirectoryPath

This looks reasonable to me.

Cheers,
  - Andreas

> -----Original Message-----
> From: squeak-dev-admin at lists.squeakfoundation.org 
> [mailto:squeak-dev-admin at lists.squeakfoundation.org] On 
> Behalf Of Ned Konz
> Sent: Saturday, November 30, 2002 11:13 PM
> To: squeak-dev at lists.squeakfoundation.org
> Subject: Re: [BUG]3.4-5125 FileDirectory>exists faulty?
> 
> 
> On Saturday 30 November 2002 01:36 pm, Andreas Raab wrote:
> > No, no, no. The use of indexes <= 0 in this primitive is UNDEFINED. 
> > Period. That the Windows VM does not fail is a bug in the 
> primitive. 
> > The Windows functions used in that code work on arbitrary 
> file systems 
> > some of which may or may not return what you are expecting. 
> Unless you 
> > show me some documentation that clearly states that the first two 
> > entries for *any* file system which can be accessed on Windows are 
> > returned in this particular order I am going to fix that bug. Which 
> > means that with the next VM it will no longer work.
> 
> In fact, I know that there are file systems available to Windows in 
> which this is not the case, having helped write the NT backup API...
> 
> I did feel uneasy about it because of that. So here's my attempt at 
> improving it:
> 
> How can we best code FileDirectory>exists, so that it'll be 
> compatible 
> with old VMs?
> 
> We don't really want to iterate through the parent directory contents.
> 
> We could try looking for an entry -- any entry -- in the directory in 
> question. If it's not there, the prim should return nil. If it's a 
> bad directory, it should return #badDirectoryPath:
> 
> FileDirectory>>exists
> "Answer whether the directory exists"
> 
> 	| result |
> 	result _ self primLookupEntryIn: pathName index: 1.
> 	^ result ~= #badDirectoryPath
> 
> Does this sound OK? It works for me on the Mac, Unix, and Windows VMs 
> I have available.
> 
> -- 
> Ned Konz
> http://bike-nomad.com
> GPG key ID: BEEA7EFE
> 
>