Bugs item #796219, was opened at 2003-08-27 20:11
Message generated for change (Comment added) made by gbrandl
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=796219&group_id=5470
Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Windows
Group: Python 2.3
>Status: Closed
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: Guido van Rossum (gvanrossum)
>Assigned to: Georg Brandl (gbrandl)
Summary: ntpath.expanduser() is still wrong
Initial Comment:
I found a system with the following setup:
- os.getenv("HOME") returns "%USERPROFILE%"
- os.getenv("USERPROFILE") returns the home directory
Currently, ntpath.py doesn't expand ~ correctly in this
case.
The fix is pretty simple, I'll try to submit it if I
have time.
----------------------------------------------------------------------
>Comment By: Georg Brandl (gbrandl)
Date: 2007-03-13 22:08
Message:
Logged In: YES
user_id=849994
Originator: NO
This is finally fixed with patch #957650.
----------------------------------------------------------------------
Comment By: Josiah Carlson (josiahcarlson)
Date: 2004-05-20 20:45
Message:
Logged In: YES
user_id=341410
I have submitted sf patch #957650 to fix the bug listed.
There is still an issue when there actually exists folders
with names that mirror environment variables, but regardless
of whether we stat the filesystem, the meaning of such a
thing is ambiguous.
The patch also includes ~user\subpath functionality, which
has been missing in ntpath.
----------------------------------------------------------------------
Comment By: Josiah Carlson (josiahcarlson)
Date: 2004-03-27 00:53
Message:
Logged In: YES
user_id=341410
After doing some more playing around, I discovered a few
other examples that would kill either method described below:
HOME=%USERDRIVE%%USERPATH%
HOME=C:\%userprofiles\%USERNAME%
The real trick is that % can exist in a path on windows, so
even c:\%HOME% is a vaild path:
Directory of D:\test
03/26/2004 03:58p <DIR> .
03/26/2004 03:58p <DIR> ..
03/26/2004 03:59p <DIR> %HOME%
0 File(s) 0 bytes
3 Dir(s) 5,355,511,808 bytes free
D:\test>
I suppose the question remains as to what cases do we want
to cover. If we assume that there aren't any % symbols in a
path, then the code is straightforward, and I can have a
patch for you in a few minutes. If % can be in a path, then
the problem is a pain, and a miniature parser needs to be
written to deal with it.
----------------------------------------------------------------------
Comment By: Guido van Rossum (gvanrossum)
Date: 2004-03-20 22:49
Message:
Logged In: YES
user_id=6380
Unclear what I'm asked to do here. Josiah, could you produce
an actual patch against CVS rather than random example code?
If you have forward slashes, you should use
os.path.normpath(). Why doesn't that work?
----------------------------------------------------------------------
Comment By: Tim Peters (tim_one)
Date: 2003-09-30 14:00
Message:
Logged In: YES
user_id=31435
Assigned back to Guido.
----------------------------------------------------------------------
Comment By: Josiah Carlson (josiahcarlson)
Date: 2003-09-30 06:33
Message:
Logged In: YES
user_id=341410
I just noticed that I've got some forward slashes in various
paths on my windows machines...here's some updated code:
def expandfull(var, rem=3):
if not rem:
return os.path.expandvars(var)
a = os.path.expandvars(var)
b = []
d = [b.extend(i.split('\\')) for i in a.split('/')]
c = []
for i in b:
if '%' in i:
c.append(expandfull(i), rem-1)
else:
c.append(i)
return '\\'.join(c)
----------------------------------------------------------------------
Comment By: Christos Georgiou (tzot)
Date: 2003-08-30 09:55
Message:
Logged In: YES
user_id=539787
I stand corrected; multiple backslashes inside a path are not
merged into one on Windows. Thank you.
----------------------------------------------------------------------
Comment By: Josiah Carlson (josiahcarlson)
Date: 2003-08-29 18:48
Message:
Logged In: YES
user_id=341410
Sourceforge ate my double-backslashes.
All '\\' should be '\\\\'.
----------------------------------------------------------------------
Comment By: Josiah Carlson (josiahcarlson)
Date: 2003-08-29 18:20
Message:
Logged In: YES
user_id=341410
The code you offered won't work correctly for all
environment variable returns. An example that would kill
your code:
%SYSTEMROOT%\System32
def expandfull(var, rem=3):
if not rem:
return expandvars(var)
a = expandvars(var)
b = a.split('\\')
c = []
for i in b:
if '%' in i:
c.append(expandfull(i), rem-1)
else:
c.append(i)
return '\\'.join(c)
The above would work properly for all environment variables.
----------------------------------------------------------------------
Comment By: Christos Georgiou (tzot)
Date: 2003-08-29 08:38
Message:
Logged In: YES
user_id=539787
If expandvars worked for nt variable syntax too, then just
before the expanduser final return, the following code would
suffice, right?
max_recursion = 3
while '%' in userhome and max_recursion > 0:
userhome = expandvars(userhome)
max_recursion -= 1
ignoring the fact that path[1:] could contain variables too.
Shouldn't expandvars be made to work with %var% format
too? If yes, I'll offer code.
----------------------------------------------------------------------
Comment By: Jarek Zgoda (zgoda)
Date: 2003-08-28 07:47
Message:
Logged In: YES
user_id=92222
This is very common setting on Windows2000 Professional.
----------------------------------------------------------------------
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=796219&group_id=5470
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
