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Shell Programming and Scripting

How to check if the file is empty or has blank space.?

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Top Forums Shell Programming and Scripting How to check if the file is empty or has blank space.?
# 8  
Old 07-18-2014
Quote:
Originally Posted by Sharma331
You are correct i am getting some data and deleting it so its coming as 1 while the file is empty.

Can't we do anything about it??
We can, open the file with vi and delete the line, type dd and save the file
# 9  
Old 07-18-2014
How about:

Code:
if [ $(tr -d ' \r\n\t' < filename | wc -c ) -eq 0 ]
then
        echo "File is empty"
else
        echo "File has non-blank characters"
fi

# 10  
Old 07-19-2014
Code:
read x1 < $file
[[ -z "$x1" ]]

This tests the first line.
Or
Code:
awk 'NF {exit 1}' $file
[[ $? -eq 0 ]]

Last edited by MadeInGermany; 07-19-2014 at 04:45 AM..
# 11  
Old 07-21-2014
Quote:
Originally Posted by Corona688
How about:

Code:
if [ $(tr -d ' \r\n\t' < filename | wc -c ) -eq 0 ]
then
        echo "File is empty"
else
        echo "File has non-blank characters"
fi

Thanks alot!! Smilie it is working now.. Smilie
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