Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!blkcat!Uucp
From: Edward.Rice@p4214.f421.n109.z1.FidoNet.Org (Edward Rice)
Newsgroups: comp.sys.mac.programmer
Subject: Volume Name + dirID == ?
Message-ID: <677239715.1@blkcat.FidoNet>
Date: 17 Jun 91 22:48:00 GMT
Lines: 29

JE> I've been following the discussion on how to obtain permanent file
JE> references.  I now know how to obtain the file's volume name and
JE> and directory ID.  How do I use them to open the file?  In particular,
JE> how do I use them to open a file on an unmounted volume whose absolute
JE> pathname is > 255 characters long?


Inside Mac again...

FUNCTION PBOpen (paramBlock: ParmBlkPtr; async: BOOLEAN) : OSErr;

Parameter block
    Q>  12  ioCompletion    pointer
    <Q  16  ioResult        word
    Q>  18  ioNamePtr       pointer
    Q>  22  ioVRefNum       word
    <Q  24  ioRefNum        word
    Q>  26  ioVersNum       byte
    Q>  27  ioPermssn       byte
    Q>  28  ioMisc          pointer

PBOpen creates an access path to the file having the name pointed to by ioNamePtr (and on flat volumes, the version number ioVersNum) on the volume specified by ioVRefNum. A path reference number is returned in ioRefNum.

IOMisc either points to a portion of memory (522 bytes) to be used as the access pathUs buffer, or is NIL if you want the volume buffer to be used instead.


Of course, on S/7, you can use aliases to shorten pathnames, if you're trying to handle the ">255 character pathname" in that environment.

 * Origin: "It's still in beta testing," Tom said pointedly. (1:109/421.4214)