Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!zaphod.mps.ohio-state.edu!mips!twg.com!lefty
From: lefty@twg.com (David N. Schlesinger)
Newsgroups: comp.sys.mac.programmer
Subject: Re: A couple of questions
Message-ID: <7496@gollum.twg.com>
Date: 6 Jul 90 23:04:31 GMT
Sender: news@twg.com
Organization: The Wollongong Group
Lines: 23
References:<26801@bcsaic.UUCP> <8799@goofy.Apple.COM>

In article <8799@goofy.Apple.COM> stevec@Apple.COM (Steve Christensen) 
writes:
> In article <26801@bcsaic.UUCP> lbaum@bcsaic.UUCP (Larry Baum) writes:
> >How can I determine if the file is alreadfy open, before I call
> >OpenResFile?
> 
> Call GetFileInfo and see if bit 7 of the ioFlAttrib field is set.  I can't
> remember if it makes a distinction between the resource and data forks or
> if that bit is set when either fork is open.

Specifically, if the resource fork of the file is open, bit 2 of 
ioFlAttrib will be set; if the data fork is open, bit 3 will be set.  If 
either fork is open, bit 7 of ioFlAttrib will be set and ioFRefNum will be 
non-zero.

Lefty

|<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>|
|           David N. Schlesinger   ||   "When I have nothing to say,       |
|           The Wollongong Group   ||    my lips are sealed;               |
| Internet: Lefty@twg.com          ||    say something once,               |
| POTS:     415/962-7219           ||    why say it again?" -- David Byrne |
|<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>|