Method: Winhelper.identifier_from_handle

Defined in:
lib/filewatch/winhelper.rb

.identifier_from_handle(handle, close_handle = true) ⇒ Object 



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# File 'lib/filewatch/winhelper.rb', line 159

def self.identifier_from_handle(handle, close_handle = true)
  fileInfo = Winhelper::FileInformation.new
  success = GetFileInformationByHandle(handle, fileInfo)
  if  success > 0
    #args = [
    #   fileInfo[:fileAttributes], fileInfo[:volumeSerialNumber], fileInfo[:fileSizeHigh], fileInfo[:fileSizeLow],
    #   fileInfo[:numberOfLinks], fileInfo[:fileIndexHigh], fileInfo[:fileIndexLow]
    # ]
    #p "Information: %u %u %u %u %u %u %u " % args
    #this is only guaranteed on NTFS, for ReFS on windows 2012, GetFileInformationByHandleEx should be used with FILE_ID_INFO, which returns a 128 bit identifier
    return "#{fileInfo[:volumeSerialNumber]}-#{fileInfo[:fileIndexLow]}-#{fileInfo[:fileIndexHigh]}"
  else
    return 'unknown'
  end
ensure
  CloseHandle(handle) if close_handle
end