I am trying to implement a bash script that will take the piped input and cut the first column and return a total. The difference is that the cut is not from a file, but from the piped input. For example:
#!/bin/bash total=$(cut -f1 $1 | numsum) echo $total
Basically, in my scenario the first column will always be from the passed input.
Example usuage is:
./script.sh "cat data.txt | grep -i status | grep something"
data.txt contains:
1 status 2 something
This will produce something like:
2
How can this be achieved? I have noticed the cut only works for files only. I cannot see any examples on Google.
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Answer
I have managed to fix the issue myself. The code is:
#!/bin/bash
total=$(eval $1 | awk '{sum+=$1} END {print sum}')
echo $total