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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9652) RawLocalFs#getFileLinkStatus does not fill in the link owner and mode
Date Mon, 12 Aug 2013 19:06:56 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Wang updated HADOOP-9652:
--------------------------------

    Attachment: hadoop-9652-6.patch

Thanks Colin, I cleaned up the calling structure in this patch and fixed the getLinkTarget
issue. Public methods now all delegate to {{getFileLinkStatus}}, which then calls either the
native or deprecated implementations as per platform support.
                
> RawLocalFs#getFileLinkStatus does not fill in the link owner and mode
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-9652
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9652
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Colin Patrick McCabe
>            Assignee: Andrew Wang
>             Fix For: 2.3.0
>
>         Attachments: hadoop-9452-1.patch, hadoop-9652-2.patch, hadoop-9652-3.patch, hadoop-9652-4.patch,
hadoop-9652-5.patch, hadoop-9652-6.patch
>
>
> {{RawLocalFs#getFileLinkStatus}} does not actually get the owner and mode of the symlink,
but instead uses the owner and mode of the symlink target.  If the target can't be found,
it fills in bogus values (the empty string and FsPermission.getDefault) for these.
> Symlinks have an owner distinct from the owner of the target they point to, and getFileLinkStatus
ought to expose this.
> In some operating systems, symlinks can have a permission other than 0777.  We ought
to expose this in RawLocalFilesystem and other places, although we don't necessarily have
to support this behavior in HDFS.

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