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Check if Data file zero length and Count File contains all zeros

Last Modified: 2013-12-26

I am writing a script in korn shell and need to do the following
1. Check if the incoming DATA file is of zero length
2. and if the DATA file is zero length check if the COUNT file is either empty or contains all zeros as nos

if [ -s DATAfilename ] and [ Count File contains nothing (empty) OR Count File contains all zeros]

  something else
An actual example would be useful.
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