[Pythonmac-SIG] Mac and unix pathnames

[Jack Jansen]

On Monday, January 21, 2002, at 01:58 , Michael J. Barber wrote:
> I don't disagree, but I do have an example that (I think) isn't just 
> sloppy programming. It is a recent discovery, so there may be a simple 
> solution that I haven't though of.

Ah, talking to external programs is exactly the sort of use case I had 
in mind. Here is a function that does the trick (but I'm not 100% sure 
it will work in 2.2 as distributed). Are people also interested in the 
reverse, i.e. obtaining Unix pathnames in a MacPython program running on 
MacOSX?

# Classicpath - convert unix pathnames (or fsspecs, or fsrefs) to
# classic MacOS colon-separated pathnames.
# Will only work in MachoPython 2.2+ and later (because part of the magic
# is that the first FSSpec() call interprets unix pathnames).
import macfs

def classicpath(item):
	import macfs
	fss = macfs.FSSpec(item)
	vrefnum, dirid, filename = fss.as_tuple()
	path = filename
	while dirid != 1:
		fss = macfs.FSSpec((vrefnum, dirid, ''))
		vrefnum, dirid, filename = fss.as_tuple()
		path = filename + ':' + path
	return path
--
- Jack Jansen        <Jack.Jansen@oratrix.com>        
http://www.cwi.nl/~jack -
- If I can't dance I don't want to be part of your revolution -- Emma 
Goldman -