27 lines
662 B
Plaintext
27 lines
662 B
Plaintext
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#!/bin/bash
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this="${0##*/}"
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USAGE="\
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usage: $this [<awk_args>] <field_no>
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Ex: getent passwd | grep andy | $this -F: 5
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Ex: echo \"A B\" | $this 2
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"
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err(){ echo -e "$USAGE" >&2; exit 1; }
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[[ $# -eq 0 ]] && err
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# bail if the *last* argument isn't a number (source:
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# http://stackoverflow.com/a/808740)
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last=${@:(-1)}
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if ! [ $last -eq $last ] &>/dev/null; then
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echo "_awk! Last argument (awk field) must be numeric." >&2
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err
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fi
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if [ $# -gt 1 ]; then
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# Source:
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# http://www.cyberciti.biz/faq/linux-unix-bsd-apple-osx-bash-get-last-argument/
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rest=${@:1:$(( $# - 1 ))}
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else
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rest='' # just to be sure
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fi
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awk $rest "{ print \$$last }"
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