gistfile1.bash

function hs () {
    n_hist_default=1000000

    n_hist=${1#-}

    if [ $1 != ''  -a  $n_hist != $1 ]; then
        shift

        if [ $n_hist -gt 0 ]; then
        else
            n_hist=$n_hist_default
        fi
    else
        n_hist=$n_hist_default
    fi

    words=($*)

    greps=""
    for w in $words; do
        greps="${greps} | grep ${w}"
    done

    # echo n: $n_hist
    # echo w: $words

    eval "history -${n_hist} ${greps}"
}