backup-v5.sh

#!/bin/bash

declare -a arr

i=0


for arg in $*; do

    arr[$i]=$arg
    ((i++))
done


# backup.sh s /ruta/origen d /ruta/destino

if [ ${arr[0]} = d ]; then

    echo ${arr[1]}

elif [ ${arr[2]} = s ]; then

    echo ${arr[3]}
else
    echo "modo de uso: $0 s /ruta/origen d /ruta/destino"
fi