Re: [MacPerl] MacPerl::SetFileInfo Help (fwd)

[mark@cheers.jsc.nasa.gov (Mark Manning/Muniz Eng.)]

According to Brian L. Matthews:
> 
> Well, it's time to put a stop to this bit of misinformation. When a file
> is created, it exists as soon as the create succeeds, and can be
> manipulated or opened again just the same as a file that's been around
> since 1984.
> 
> Consider:
> 
> open F1, ">testfile" or die "can't create testfile: $!\n";
> open F2, "<testfile" or die "can't open testfile: $!\n";
> 
> This works fine. If testfile didn't exist until it was closed, it wouldn't
> work, the second open would fail with a "No such file or directory".
<snip>

Ok!  :-)  If this is the case that's great!  :-)

However, the original question was: When I create a file I
can not set the type and creator information.  Not - can I
read the file immediately after opening the file.  :-/

Also, my question about your example is: Does the second
OPEN statement cause the system to flush out any other
system requests (such as file creations) before performing
the second OPEN statement?  If so, then the second OPEN
statement is acting like the OPEN/CLOSE/OPEN I mentioned
earlier.  Because the second OPEN statement makes a system
request which can not be fullfilled until the first request
is completed.

So to test this correctly, you need to open a file and then
immediately do the type/creator command and see if it gets
set correctly or if an error occurs.  Then you'd have to
try this out on both 68k systems as well as PPCs so you
could be sure it did the same thing on both system types.
:-(  This is not to mention having to try it out on System
7.6, 7.5.5, 7.5.3, 7.2, 7.1, and 6.0.  Blech.  :-P  And
someone might go "Oh yeah.  Right.  You're just blowing
smoke." Maybe - who cares really?  This is getting into the
"OH MY GOD!" stage.  But the truth is I do not even know
what kind of a system the person was running on, their OS,
memory constraints, etc....  So it could be one of many
reasons why they couldn't set their file's type and creator
information.  It might be something as simple as their not
having installed MacPerl correctly (though I really doubt
this as easy as it is to install).

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