Clear bash history of any lines matching keyword

clearhistory.sh

#!/bin/bash
#
echo '# @author brockhensley'
echo '# @version 1.0.0'
echo '# @date Last updated April 18th 2013'
echo '# @link brockhensley.com'

if [ -z "$@" ] 
then
    echo '#'
    echo '# Enter search string to clear from history as parameter'
    echo '#'
    echo '# Example: ./clearhistory.sh anythingwiththisword'
    echo '#'
    exit 0
fi

for var in "$@"
do
    grep -v $var "$HISTFILE" > /tmp/history
    mv /tmp/history "$HISTFILE"
done