Wishlist: check-domains

[mgedmin]

It would be another daily script like check-ssl-certs, with configuration in /etc/pov/check-domains.

It would have a new helper function:

get_expiration_date() {
    # this works for .com and .net domains
    # whois pov.lt doesn't tell me the expiration date!
    whois $1 | grep "^ *Expiration Date:\|^Expires:\|^paid-till:\|^Registry Expiry Date:" | sed -e 's/^[^:]*: *//' -e 's/\([0-9]\{4\}\)[.]\([0-9]\{2\}\)[.]\([0-9]\{2\}\)/\1-\2-\3/g'
    # you get something like "28-nov-2013" or "14 Jul 2018 00:00 UTC" or "2014.08.26" or "2018-07-14T00:00:00.000Z"
}

checkdomain() {
    local domain=$1
    local days=${2:-60}
    local expires=$(get_expiration_date $domain)
    if [ -z "$expires" ]; then
        warn "$domain: cannot get expiration date from whois"
        return
    fi
    local expires_as_time_t=$(date +%s --date="$expires")
    local now_as_time_t=$(date +%s)
    local seconds_remaining=$((expires_as_time_t - now_as_time_t))
    local days_remaining=$((seconds_remaining / 86400))
    if [ $days_remaining -le $days ]; then
        warn "$domain expires in $days_remaining days ($expires)"
    elif [ $verbose -ne 0 ]; then
        echo "$domain expires in $days_remaining days ($expires)"
    fi
}