iwantmyname DNS API wrapper

iwantmyname.sh

#!/usr/bin/env bash

## iwantmyname DNS API wrapper
## see <https://iwantmyname.com/developer/domain-dns-api>

usage() {
    echo "Usage: `basename $0` <RECORD_TYPE> <HOSTNAME> <RECORD_VALUE>
    RECORD_TYPE := A|AAAA|TXT|MX|CNAME|NAPTR|SRV

    e.g. `basename $0` A blog.example.com 123.456.78.90
         `basename $0` CNAME www.example.com example.com
         `basename $0` TXT _acme-challenge.example.com DmCKygRUkCIApIfHtpELeHy3f5JXcm_WNQccuADh1Do"
}

[ $# -ne 3 ] && usage && exit 1

read -p 'Email: ' USER
read -p 'Password: ' -s PASS
echo

TYPE="$1"
HOSTNAME="$2"
VAL="$3"

case $TYPE in
    a|aaaa|A|AAAA)
        curl -u "$USER:$PASS" "https://iwantmyname.com/basicauth/ddns?hostname=$HOSTNAME&myip=$VAL"
        ;;
    txt|mx|cname|naptr|srv|TXT|MX|CNAME|NAPTR|SRV)
        curl -u "$USER:$PASS" "https://iwantmyname.com/basicauth/ddns?hostname=$HOSTNAME&type=$TYPE&value=$VAL"
        ;;
    *)
        echo "Invalid record type: $1"
        usage
        exit 1;;
esac
echo