[Bug 1953] New: Implementation of xattr in sftp-server for sshfs

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https://bugzilla.mindrot.org/show_bug.cgi?id=1953

             Bug #: 1953
           Summary: Implementation of xattr in sftp-server for sshfs
    Classification: Unclassified
           Product: Portable OpenSSH
           Version: 5.9p1
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: patch
          Severity: enhancement
          Priority: P2
         Component: sftp-server
        AssignedTo: unassigned-bugs at mindrot.org
        ReportedBy: e.kuemmerle at fz-juelich.de


Created attachment 2109
  --> https://bugzilla.mindrot.org/attachment.cgi?id=2109
Patch that implements xattr in sftp-server

In the attachment you will find a patch that implements xattr
functionality in the sftp-server, intended to be used by sshfs.
A corresponding patch to sshfs will be filed to the sshfs developers.

I did not implement xattr in sftp-client, because I think that it is
not really useful: For sshfs, the low level functions
set-/get-/list-/removexattr are needed. But for a user interface like
sftp-client, high level functions like set-/getfacl and set-/getfattr
would be necessary. These are rather complex and would unnecessarily
burden the sftp-client code in my opinion.

Additionally, I changed the limitation of entries per message in
process_readdir from max. 100 entries to a packet size limitation,
because the size per entry may be enlarged by xattr data. But
typically, much more than 100 entries can now be sent in one message.

I hope, that you are interested in my patch.

Thanks,
  Eberhard

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