[CalendarServer-dev] Re: twisted dav : xattrprops on linux

[Guido Guenther]

Hi Wilfredo,
On Mon, Sep 11, 2006 at 03:12:51PM -0700, Wilfredo Sánchez Vega wrote:
>   (Let's chat on the mailing list; I don't always respond to direct  
> mail, get too much and all that.)
> 
>   That's a weird rule...
> 
>   Does it make sense for this to be hidden in the xattr library?   
> Perhaps not...  I kinda hate to so this on OS X just because Linux is  
> weird.
I'm using this in twisted to fix this: 

--- twisted/web2/dav/xattrprops.py.orig	2006-09-05 22:09:03.000000000 +0200
+++ twisted/web2/dav/xattrprops.py	2006-09-05 23:12:17.000000000 +0200
@@ -32,6 +32,7 @@
 __all__ = ["xattrPropertyStore"]
 
 import urllib
+import sys
 
 import xattr
 
@@ -58,8 +59,11 @@
     #
     # Dead properties are stored as extended attributes on disk.  In order to
     # avoid conflicts with other attributes, prefix dead property names.
-    #
-    deadPropertyXattrPrefix = "WebDAV:"
+    # Linux additionally needs everything in the user namespace
+    if sys.platform == 'linux2':
+        deadPropertyXattrPrefix = "user.WebDav:"
+    else:
+        deadPropertyXattrPrefix = "WebDAV:"
 
     def _encode(clazz, name):
         #

This looks clean and hardcodes the namespace at exactly one place.
Addingt this to xattr doesn't seem reasonable since there are other
namespaces.
Cheers,
 -- Guido