Message63533
I found a bug (or at least a shortcoming) in Python's os.path.normpath routine.
It overly normalizes, at least for Unix and Unix-like systems (including Mac), and
Windows.
Example:
x = os.path.join(".", "dog", "..", "cupcake.txt")
print x
x = os.path.normpath(x)
print x
If say "dog" is a symlink (any flavor of Unix (including OS X), or Win), there is a
difference between ./dog/../cupcake.txt and ./cupcake.txt.
In the OS, if dog is a symlink to fire/fly, the .. resolves relative to fire/fly.
It should be safe to normalize this:
././././././././cupcake.txt --> ./cupcake.txt
It should be safe to normalize this:
.////////////////cupcake.txt --> ./cupcake.txt
But this is not safe to normalize:
./x/../x/../x/../cupcake.txt --> ./cupcake.txt
For example, if the directories look like this:
./cupcake.txt
./over/yonder/back/cupcake.txt
./x --> over/there
./over/there
./over/x --> yonder/aways
./over/yonder/aways
./over/yonder/x --> back/again
./over/yonder/back/again
./cupcake.txt refers to first cupcake.
./x/../x/../x/../cupcake.txt refers to the second cupcake.
The os.path.realpath does the resolve, but sometimes the path-in-hand is for some
arbitrary path, and not necessarily one on the local system, or if on the local
files system may be relative based off from a different cwd. |
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Date |
User |
Action |
Args |
2008-03-14 18:43:45 | eljay451 | set | spambayes_score: 0.0330139 -> 0.033013918 recipients:
+ eljay451 |
2008-03-14 18:43:45 | eljay451 | set | spambayes_score: 0.0330139 -> 0.0330139 messageid: <1205520225.21.0.16693669718.issue2289@psf.upfronthosting.co.za> |
2008-03-14 18:43:44 | eljay451 | link | issue2289 messages |
2008-03-14 18:43:43 | eljay451 | create | |
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