Revision c37bb2c6 lib/client/gnt_instance.py

b/lib/client/gnt_instance.py
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    cl = GetClient()
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    inames = _ExpandMultiNames(opts.multi_mode, args, client=cl)
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    if not inames:
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      if opts.multi_mode == _SHUTDOWN_CLUSTER:
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        ToStdout("Cluster is empty, no instances to shutdown")
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        return 0
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      raise errors.OpPrereqError("Selection filter does not match"
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                                 " any instances", errors.ECODE_INVAL)
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    multi_on = opts.multi_mode != _SHUTDOWN_INSTANCES or len(inames) > 1

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