block country iptables bash script

#!/bin/bash

PATH=/bin:/usr/bin:/usr/local/bin:/sbin
CURDATE=`date +%s`
CURL=/usr/bin/curl
ISOLIST=(${*})
OLDDATE=`expr ${CURDATE} - 86400`
URL=https://ip.ludost.net/raw/country.db.gz

# Set modification date if database is around
if [ -f ./country.db ]; then
    MODDATE=`stat -c %Y ./country.db`
fi

# Only root can run this script
if [[ $EUID -ne 0 ]]; then
    echo "This script must be run as root" 1>&2
    exit 1
fi

# Check for curl
if [ ! -x ${CURL} ]; then
    printf "\n \033[1mcurl not found\033[0m\n \033[1mplease install curl\033[0m\n\n"
    exit 1
fi

# If database does not exist, Print usage and download database
if [ ! -f ./country.db ]; then
    printf "\n \033[1mUsage:\t\t./mine.sh <space delimited ISO codes>\033[0m\n"
    printf " \t\t\033[1m ** country ISO codes are two characters **\033[0m\n"
    printf " \033[1mExample:\t./mine.sh cn [ru] [gb] [eu]\033[0m\n"
    printf "\n ** Database not found."
    printf "\n ** A new copy of country.db downloading...\n\n"
    curl -O $URL && gunzip -f ${URL##*/}
    printf "\n"
    exit 1

# If database exists, but it is older than one day, Print usage and download fresh database
elif [ -f ./country.db ] && [ ${MODDATE} -lt ${OLDDATE} ]; then
    printf "\n \033[1mUsage:\t\t./mine.sh <space delimited ISO codes>\033[0m\n"
    printf " \t\t\033[1m ** country ISO codes are two characters **\033[0m\n"
    printf " \033[1mExample:\t./mine.sh cn [ru] [gb] [eu]\033[0m\n"
    printf "\n ** Database is older than one day."
    printf "\n ** A fresh copy of country.db downloading...\n\n"
    curl -O $URL && gunzip -f ${URL##*/}
    printf "\n"
    exit 1

# If country code input is empty, the database exists, and database is not old, Print usage
elif [ -z "${ISOLIST}" ] && [ -f ./country.db ] && [ ${MODDATE} -gt ${OLDDATE} ]; then
    printf "\n \033[1mUsage:\t\t./mine.sh <space delimited ISO codes>\033[0m\n"
    printf " \t\t\033[1m ** country ISO codes are two characters **\033[0m\n"
    printf " \033[1mExample:\t./mine.sh cn [ru] [gb] [eu]\033[0m\n\n"
    exit 0

# If script makes it to here, new-ish database exists and the country code has been entered
# Git-R-Done
else
    for i in ${ISOLIST[*]}
    do
        IP+=($(grep -i $i ./country.db | awk '{print $1"-"$2}'))
    done
    # Wait message, rules applied
    printf "\n \033[1mOne moment...\033[0m\n\n"
    for r in ${IP[*]}
    do
        ## Print actions on console
        ##printf "iptables -A INPUT -m iprange --src-range $r -j DROP\n"
        # Uncomment line below to really commit
        iptables -A INPUT -m iprange --src-range $r -j DROP
    done

fi