Dynamic DNS support shell script for freenom.com

check

#!/bin/bash
GET_IP_URL="https://api.ipify.org/"
UPDATE_SCRIPT=$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )/update
LOGGER_SCRIPT=$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )/log
source $( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )/config

HOST_RESULT="$(host $freenom_domain_name 80.80.80.80)"
DNS_IP=$(echo $HOST_RESULT | cut -d' ' -f 12)
CURR_IP="$(curl -s $GET_IP_URL)"

$LOGGER_SCRIPT start

$LOGGER_SCRIPT continue "Current IP: $CURR_IP :: DNS IP: $DNS_IP"

if [ $DNS_IP = $CURR_IP ]
then
$LOGGER_SCRIPT continue "No change is needed, exiting"
else
$LOGGER_SCRIPT continue "Change is needed procedeing to execute freenom update script"
$UPDATE_SCRIPT
fi
$LOGGER_SCRIPT end

config

#!/bin/bash
freenom_email="example@example.com"
freenom_passwd="hackme"
freenom_domain_name="example.com"
freenom_domain_id="000000000"

log

#!/bin/bash
FULL_PATH=$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )/log.log
if [ ! -e $FULL_PATH ]
then
touch $FULL_PATH
fi
case $1 in
"erase")
rm $FULL_PATH
;;
"start")
echo "Started domain address check at:   $(date)" >> $FULL_PATH
;;
continue)
echo $2 >> $FULL_PATH
;;
"end")
echo "" >> $FULL_PATH
echo "" >> $FULL_PATH
echo "" >> $FULL_PATH
echo "" >> $FULL_PATH
;;
*)
echo "$1  no es una opción"
exit 1
;;
esac

update

#!/bin/bash
set -u

# settings
# Login information of freenom.com
# Open DNS management page in your browser.
# URL vs settings:
#   https://my.freenom.com/clientarea.php?managedns={freenom_domain_name}&domainid={freenom_domain_id}
source $( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )/config
BASE_URL="https://my.freenom.com"
CAREA_URL="$BASE_URL/clientarea.php"
LOGIN_URL="$BASE_URL/dologin.php"
LOGOUT_URL="$BASE_URL/logout.php"
MANAGED_URL="$CAREA_URL?managedns=$freenom_domain_name&domainid=$freenom_domain_id"
GET_IP_URL="https://api.ipify.org/"
LOGGER_SCRIPT=$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )/log

# get current ip address
current_ip="$(curl -s "$GET_IP_URL")"

if [ -z "$current_ip" ]; then
        $LOGGER_SCRIPT continue "Could not get current IP address."
    exit 1
fi

cookie_file=$(mktemp)
cleanup() {
    $LOGGER_SCRIPT continue "Cleanup"
    rm -f "$cookie_file"
}
trap cleanup INT EXIT TERM

$LOGGER_SCRIPT continue "Login"
loginResult=$(curl --compressed -k -L -c "$cookie_file" \
                   -F "username=$freenom_email" -F "password=$freenom_passwd" \
                   -e "$CAREA_URL" \
                   "$LOGIN_URL" 2>&1)

if [ ! -s "$cookie_file" ]; then
    $LOGGER_SCRIPT continue "Login failed: empty cookie."
    exit 1
fi

if echo "$loginResult" | grep -q "/clientarea.php?incorrect=true"; then
    $LOGGER_SCRIPT continue "Login failed."
    exit 1
fi

$LOGGER_SCRIPT continue "Update $current_ip to domain($freenom_domain_name)"
updateResult=$(curl --compressed -k -L -b "$cookie_file" \
                    -e "$MANAGED_URL" \
                    -F "dnsaction=modify" \
                    -F "records[0][line]=" \
                    -F "records[0][type]=A" \
                    -F "records[0][name]=" \
                    -F "records[0][ttl]=14440" \
                    -F "records[0][value]=$current_ip" \
                    "$MANAGED_URL" 2>&1)

if ! echo "$updateResult" | grep -q "name=\"records\[0\]\[value\]\" value=\"$current_ip\""; then
    $LOGGER_SCRIPT continue "Update failed." 1>&2
    exit 1
fi

$LOGGER_SCRIPT continue "Logout"
curl --compressed -k -b "$cookie_file" "$LOGOUT_URL" > /dev/null 2>&1

exit 0

Hi Reiikz,
Thanks for your feedback. and definitly will look into your suggestion see will this work for me.
Thanks once again.