resolv_domain.sh

_resolv_domain_name() {
    if _cmd_exists dscacheutil; then
        # Mac OSX
        dscacheutil -q host -a name "$1" | grep ip_address | cut -d ":" -f2 | head -n 1 | xargs
    elif _cmd_exists dig; then
        dig A +short "$1" | head -n 1 | xargs
    elif _cmd_exists nslookup; then
        # exclude IPV6
        nslookup "$1" | awk '/^Address: / { print $2 }' | grep -Eo '[0-9\.]{7,15}' | head -n 1 | xargs
    elif _cmd_exists host; then
        # exclude IPV6
        host "$1" | awk '/has address/ { print $4 }' | head -n 1 | xargs
    else
        # exclude IPV6
        getent ahosts "$1" | grep -Eo '[0-9\.]{7,15}' | awk '{ print $1 }' | head -n 1 | xargs
    fi
}