[Pythonmac-SIG] Python and resource forks under Mac OS X

[Lars Damerow]

Hello Python-mac folks!

I sent this question to comp.lang.python and got no response, so I'll target a
narrower audience. :)

Do the resource fork manipulation tools in the standard library work under
OS X?

I'm hoping to use them to copy the resource fork out of one file and into
a regular file, and also to copy that file into the resource fork of
another file. I looked at macostools.py, specifically at the copy()
function, and wrote these functions to do the job:

import MacOS
from macostools import BUFSIZ

def joinResources(args):
    source, target = args
    infile = open(source, "rb")
    rf = infile.read(BUFSIZ)
    if rf != '':
        outfile = MacOS.openrf(target, "wb")
        while rf:
            outfile.write(rf)
            rf = infile.read(BUFSIZ)
        outfile.close()
    infile.close()

def splitResources(args):
    source, target = args
    infile = MacOS.openrf(source, "*rb")
    rf = infile.read(BUFSIZ)
    if rf != '':
        outfile = open(target, "wb")
        while rf:
            outfile.write(rf)
            rf = infile.read(BUFSIZ)
        outfile.close()
    infile.close()

I tried using them to copy the icon from one file to another, but the
Finder doesn't seem to notice the new resource fork; the target file's
icon doesn't change. When I open the target file in a program like
Resourcer, though, it looks like the resource fork was copied correctly.
Baffling!

I also tried using the macostools.copy() to copy a file that had an icon,
and the resulting file was icon-less. :)

Am I doing something wrong? Any tips would be greatly appreciated!

Thanks,
lars

___________________________________________________________
lars damerow
button pusher
lars-pythonmac@pixar.com

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