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From: berner@Navajo.ARPA (William Berner)
Newsgroups: net.sources.mac
Subject: Inside Mac Volume II page 91
Message-ID: <400@Navajo.ARPA>
Date: Mon, 3-Mar-86 16:13:02 EST
Article-I.D.: Navajo.400
Posted: Mon Mar  3 16:13:02 1986
Date-Received: Wed, 5-Mar-86 05:43:35 EST
Reply-To: berner@Navajo.UUCP (William Berner)
Organization: Stanford University
Lines: 62

Here is the missing page from Inside Macintosh.  This was posted to 
Info-Mac awhile back, but I'm afraid that I've forgotten who posted 
it.  


[from [SUMEX]<INFO-MAC>INSIDEMACPAGEII-91.TXT]

 -------------------------------------------------------------------------
                                                         The File Manager

Result codes   noErr        No error
               bdNamErr     Bad file name
               dupFNErr     Duplicate file name and version
               dirFulErr    File directory full
               extFSErr     External file system
               ioErr        I/O error
               nsvErr       No such volume
               vLckdErr     Software volume lock
               wPrErr       Hardware volume lock

FUNCTION FSOpen (fileName: Str255; vRefNum:  INTEGER; VAR refNum:
           INTEGER)  :  OSErr;  [Not in ROM]

FSOpen creates an access path to the file having the name fileName on the
volume specified by vRefNum.  A path reference number is returned in refNum.
The access path's read/write permission is set to whatever the file's open
permission allows.

Result codes   noErr        No error
               bdNamErr     Bad file name
               extFSErr     External file system
               fnfErr       File not found
               ioErr        I/O error
               nsvErr       No such volume
               opWrErr      File already open for writing
               tmfoErr      Too many files open

FUNCTION OpenRF (fileName: Str255; vRefNum: INTEGER; VAR refNum:
           INTEGER)  :  OSErr;  [Not in ROM]

OpenRF is similar to FSOpen; the only difference is that OpenRF opens the
resource fork of the specified file rather than the data fork.  A path
reference number is returned in refNum.  The access path's read/write
permission is set ot whatever the file's open permission allows.

  NOTE:  Normally you should access a file's resource fork through the
  routines of the Resource Manager rather than the File Manager.  OpenRF
  doesn't read the resource map into memory;  it's really only useful for
  block-level operations such as copying files.

Result codes   noErr        No error
               bdNamErr     Bad file name
               extFSErr     External file system
               fnfErr       File not found
               ioErr        I/O error
               nsvErr       No such volume
               opWrErr      File already open for writing
               tmfoErr      Too many files open



                                   High-level File Manager Routines II-91