mirror of https://github.com/tLDP/LDP
37 lines
825 B
Bash
37 lines
825 B
Bash
#!/bin/bash
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# Yet another version of the "column totaler" script (col-totaler.sh)
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# that adds up a specified column (of numbers) in the target file.
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# This uses the environment to pass a script variable to 'awk'.
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ARGS=2
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E_WRONGARGS=65
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if [ $# -ne "$ARGS" ] # Check for proper no. of command line args.
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then
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echo "Usage: `basename $0` filename column-number"
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exit $E_WRONGARGS
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fi
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filename=$1
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column_number=$2
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#===== Same as original script, up to this point =====#
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export column_number
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# Export column number to environment, so it's available for retrieval.
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# Begin awk script.
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# ------------------------------------------------
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awk '{ total += $ENVIRON["column_number"]
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}
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END { print total }' $filename
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# ------------------------------------------------
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# End awk script.
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# Thanks, Stephane Chazelas.
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exit 0
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