#!/bin/sh## dgibson.sh - run the dgibson entry## usage:#	dgibson.sh [data_file]# parse args#if [ $# -eq 0 ]; then    DATA="./dgibson.data1"else    DATA="$1"fiif [ ! -f "$DATA" ]; then    echo "$0: no data found in $DATA" 1>&2    exit 1fi# for the initial data.name if needed#if [ ! -f "data.name" ]; then    rm -f data.name    echo "$DATA" > data.namefiif [ ! -f life.d ]; then    # force a new life setup    echo "/" > data.namefirm -f data.name2echo "$DATA" > data.name2# note if we are running a new form#if cmp -s data.name data.name2; then    :else    rm -f life.d    cp "$DATA" life.d    rm -f data.name    echo "$DATA" > data.name    cat life.dfi# build a new copy of the program#rm -f dgibsonmake dgibson# form the next generation#chmod +w life.ddgibson | tee life.d