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https://issues.apache.org/jira/browse/HADOOP-8139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13225672#comment-13225672
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Doug Cutting commented on HADOOP-8139:
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I don't understand the motivation for (1) over (3). When would a non-windows
user want subbing? When would a Windows user not require it?
(2) will probably require changes to more than RawLocalFileSystem. You won't
know unless you try to run things on Windows. Last time I worked on this
(years ago) I was surprised at the number of places that paths with backslashes
crept in. This is probably the best long-term approach, but it may be a lot of
work to stomp all the bugs.
(4) Is simplest, but system-dependent escapes would be unfortunate.
I don't see a clear winner. I prefer (2) or (4) to (1) or (3): if the ability
to escape paths is a critical feature for Unix users then it's probably a
critical feature for Windows users.
> Path does not allow metachars to be escaped
> -------------------------------------------
>
> Key: HADOOP-8139
> URL: https://issues.apache.org/jira/browse/HADOOP-8139
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.23.0, 0.24.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Blocker
> Attachments: HADOOP-8139-2.patch, HADOOP-8139.patch, HADOOP-8139.patch
>
>
> Path converts "\" into "/", probably for windows support? This means it's
> impossible for the user to escape metachars in a path name. Glob expansion
> can have deadly results.
> Here are the most egregious examples. A user accidentally creates a path like
> "/user/me/*/file". Now they want to remove it.
> {noformat}"hadoop fs -rmr -skipTrash '/user/me/\*'" becomes...
> "hadoop fs -rmr -skipTrash /user/me/*"{noformat}
> * User/Admin: Nuked their home directory or any given directory
> {noformat}"hadoop fs -rmr -skipTrash '\*'" becomes...
> "hadoop fs -rmr -skipTrash /*"{noformat}
> * User: Deleted _everything_ they have access to on the cluster
> * Admin: *Nukes the entire cluster*
> Note: FsShell is shown for illustrative purposes, however the problem is in
> the Path object, not FsShell.
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