[Pythonmac-SIG] MacOS 10.4: getxattr() etc. for Python?
wolfgang.keller.nospam at gmx.de
Wed May 4 23:10:27 CEST 2005
>> > Dumb question: How about integrating it "officially" in the Macpython
>> > distribution, so that all file objects on MacOS X.4 automatically have
>> > an xattr dict?
>> Are these functions in any way standard (eg. does FreeBSD have
>> them?). If so, they should probably be detected at configure time.
> I don't believe FreeBSD has them, but the SELinux project has them
> for ACLs, though they are poorly documented. They may also exist in
> other file systems, such as ReiserFS. Also, the concept exists on
> Solaris as well.
Basically _every_ "modern" file system has extended attributes.
> The trick is that on Solaris and SELinux they're purely an ACL issue
> as far as I know.
The irony is that it seems that currently _no_ OS that supports
extended attributes allows the user to actually use them. Because
there's no UI.
> I believe Tiger is the first OS to fully deploy an abstract
> meta-data infrastructure in the FS.
Most definitely not. In fact MacOS X actually seems to be (one of) the
last OSes which supports user-definable extended attributes.
As I've been told, OS/400 had even a real "filebase" including
relations etc. for decades. VMS had EAs for decades as well. XFS is
probably th eoldest unix filesystem with EAs. OS/2's HPFS has them
since it existed etc...
BeOS was/is apparently the only OS that allowed end user to actually
use extended attributes. Through its "Tracker".
While MacOS X.4 doesn't (provide a UI to user-defined extended
BTW: How many years after Jobs generated all hype bubbles to drag
Amelio away from Be, hype bubbles which extremely ressembled those
that MS created around "Chicago" in order to FUD users and companies
away from OS/2...? It's been so long ago I can't even remember it.
>> Another question is if empty xattr dicts should appear on platforms
>> with no support for them.
> Yes, they should appear empty, and I would imagine, throw an
> Exception on any attempt to set them.
And, imho, the API (a dict) should be identical on all platforms that
support EAs, not just on MacOS X.
P.S.: My From-address is correct
More information about the Pythonmac-SIG