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Getting parent of nonexistent file

Subject: Getting parent of nonexistent file
From: "Steve Mills" <email@hidden>
Date: Fri, 29 Jul 2005 13:20:11 -0500
Delivered-to: email@hidden
Delivered-to: email@hidden

If spec refers to a file that does NOT exist, but the parent directory (spec->parID) DOES exist, should this work?

OSErr FSpGetParent(FSSpec* spec)
{
    CInfoPBRec        pb;
    DirInfo*          dirRec = (DirInfo*)&pb;
    OSErr             err;
    Str255            s;

    PStrCopy(spec->name, s);
    dirRec->ioCompletion = nil;
    dirRec->ioNamePtr = s;
    dirRec->ioVRefNum = spec->vRefNum;
    dirRec->ioFDirIndex = -1;
    dirRec->ioDrDirID = spec->parID;
    err = PBGetCatInfoSync(&pb);

if(err == noErr) err = FSMakeFSSpec(dirRec->ioVRefNum, dirRec->ioDrParID, s, spec);

    return err;
}

Should err returned from PBGetcatInfoSync be noErr or fnfErr, and should ioDrParID contain the parent directory upon completion?

I have a customer who is getting random problems when saving documents. We create a temp file in kTemporaryFolderType. Calling our FSpGetParent routine on a nonexistent file seems to work most of the time, but sometimes returns fnfErr. At this point I don't know which call in FSpGetParent is returning the fnfErr, so I'm adding more logging to a build for the customer.

They say the volume where these files reside are on an external FireWire drive connected to their OSX server. Is it possible that the TemporaryItems folder is being deleted between the time we call FindFolder and the call to FSpGetParent (which should be only microseconds apart from each other)?

_________________________________________________________
Steve Mills                              Me: 952-401-6255
Senior Software Architect                         MultiAd
email@hidden                       www.multi-ad.com


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