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https://issues.apache.org/jira/browse/HADOOP-8139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13224495#comment-13224495
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Daryn Sharp commented on HADOOP-8139:
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{quote}
Here are the scenarios to consider (sorry I do not have access to Windows PC).
# On windows terminal paths use '/' and WINDOWS is true.
# On Cygwin terminal paths use '\' and WINDOWS is (probably) true. In this case
the patch might introduce unnecessary behavior?
{quote}
Good questions. The pre-existing WINDOWS flag is based on
{{System.getProperty("os.name").startsWith("Windows");}} so it should be true
for both cygwin and non-cygwin.
If the "^" to "\" substitution is removed, then no behavior changes for
windows. It just won't be able to quote metachars. I'm fine with that.
> 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
> Priority: Blocker
>
> 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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