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21 lines
310 B
21 lines
310 B
#!/bin/sh
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m=10
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useage () {
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echo "Usage: head [OPTION]... [FILE]..."
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echo -e "\t-n,-[0-9]+\tprint first NUMBER lines instead of first 10"
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exit 1
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}
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while [ "$1" ] ; do
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case "$1" in
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-n) m="$2" ; shift ; shift ;;
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-[0-9]*) m=${1#-}; shift ;;
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-*) useage ;;
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*) break;
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esac
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done
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exec grep -m$m "" $*
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